diff options
Diffstat (limited to 'libblkid/lib')
32 files changed, 9234 insertions, 0 deletions
diff --git a/libblkid/lib/Makemodule.am b/libblkid/lib/Makemodule.am new file mode 100644 index 000000000..565294e5c --- /dev/null +++ b/libblkid/lib/Makemodule.am @@ -0,0 +1,115 @@ + +noinst_LTLIBRARIES += libcommon.la +libcommon_la_CFLAGS = $(AM_CFLAGS) +libcommon_la_SOURCES = \ + lib/at.c \ + lib/blkdev.c \ + lib/canonicalize.c \ + lib/colors.c \ + lib/crc32.c \ + lib/crc64.c \ + lib/env.c \ + lib/fileutils.c \ + lib/ismounted.c \ + lib/mangle.c \ + lib/match.c \ + lib/mbsalign.c \ + lib/md5.c \ + lib/pager.c \ + lib/path.c \ + lib/procutils.c \ + lib/randutils.c \ + lib/setproctitle.c \ + lib/strutils.c \ + lib/sysfs.c \ + lib/timeutils.c \ + lib/ttyutils.c \ + lib/exec_shell.c \ + lib/readutmp.c + +if LINUX +libcommon_la_SOURCES += \ + lib/linux_version.c \ + lib/loopdev.c +endif + +if !HAVE_LANGINFO +libcommon_la_SOURCES += lib/langinfo.c +endif + +if HAVE_CPU_SET_T +libcommon_la_SOURCES += lib/cpuset.c +endif + +dist_man_MANS += lib/terminal-colors.d.5 + +check_PROGRAMS += \ + test_at \ + test_blkdev \ + test_canonicalize \ + test_colors \ + test_fileutils \ + test_ismounted \ + test_mangle \ + test_procutils \ + test_randutils \ + test_strutils \ + test_ttyutils + +if LINUX +if HAVE_CPU_SET_T +check_PROGRAMS += test_cpuset +endif +check_PROGRAMS += \ + test_sysfs \ + test_pager +endif + +test_ttyutils_SOURCES = lib/ttyutils.c +test_ttyutils_CFLAGS = -DTEST_PROGRAM +test_ttyutils_LDADD = libcommon.la + +test_blkdev_SOURCES = lib/blkdev.c +test_blkdev_CFLAGS = -DTEST_PROGRAM_BLKDEV +test_blkdev_LDADD = libcommon.la + +test_ismounted_SOURCES = lib/ismounted.c +test_ismounted_CFLAGS = -DTEST_PROGRAM +test_ismounted_LDADD = libcommon.la + +test_mangle_SOURCES = lib/mangle.c +test_mangle_CFLAGS = -DTEST_PROGRAM + +test_at_SOURCES = lib/at.c +test_at_CFLAGS = -DTEST_PROGRAM_AT + +test_strutils_SOURCES = lib/strutils.c +test_strutils_CFLAGS = -DTEST_PROGRAM + +test_colors_SOURCES = lib/colors.c +test_colors_CFLAGS = -DTEST_PROGRAM + +test_randutils_SOURCES = lib/randutils.c +test_randutils_CFLAGS = -DTEST_PROGRAM + +test_procutils_SOURCES = lib/procutils.c lib/at.c +test_procutils_CFLAGS = -DTEST_PROGRAM + +if LINUX +test_cpuset_SOURCES = lib/cpuset.c +test_cpuset_CFLAGS = -DTEST_PROGRAM + +test_sysfs_SOURCES = lib/sysfs.c +test_sysfs_CFLAGS = -DTEST_PROGRAM_SYSFS +test_sysfs_LDADD = libcommon.la + +test_pager_SOURCES = lib/pager.c +test_pager_CFLAGS = -DTEST_PROGRAM +endif + +test_fileutils_SOURCES = lib/fileutils.c +test_fileutils_CFLAGS = -DTEST_PROGRAM + +test_canonicalize_SOURCES = lib/canonicalize.c +test_canonicalize_CFLAGS = -DTEST_PROGRAM_CANONICALIZE + diff --git a/libblkid/lib/at.c b/libblkid/lib/at.c new file mode 100644 index 000000000..f8bfe1399 --- /dev/null +++ b/libblkid/lib/at.c @@ -0,0 +1,143 @@ +/* + * Portable xxxat() functions. + * + * No copyright is claimed. This code is in the public domain; do with + * it what you wish. + * + * Written by Karel Zak <kzak@redhat.com> + */ +#include <stdio.h> +#include <stdlib.h> +#include <fcntl.h> +#include <sys/stat.h> + +#include "at.h" +#include "c.h" + +#ifdef HAVE_FSTATAT +int fstat_at(int dir, const char *dirname __attribute__ ((__unused__)), + const char *filename, struct stat *st, int nofollow) +{ + return fstatat(dir, filename, st, + nofollow ? AT_SYMLINK_NOFOLLOW : 0); +} +#else +int fstat_at(int dir, const char *dirname, const char *filename, + struct stat *st, int nofollow) +{ + + if (*filename != '/') { + char path[PATH_MAX]; + int len; + + len = snprintf(path, sizeof(path), "%s/%s", dirname, filename); + if (len < 0 || len + 1 > sizeof(path)) + return -1; + + return nofollow ? lstat(path, st) : stat(path, st); + } + + return nofollow ? lstat(filename, st) : stat(filename, st); +} +#endif + +#ifdef HAVE_FSTATAT +int open_at(int dir, const char *dirname __attribute__ ((__unused__)), + const char *filename, int flags) +{ + return openat(dir, filename, flags); +} +#else +int open_at(int dir, const char *dirname, const char *filename, int flags) +{ + if (*filename != '/') { + char path[PATH_MAX]; + int len; + + len = snprintf(path, sizeof(path), "%s/%s", dirname, filename); + if (len < 0 || len + 1 > sizeof(path)) + return -1; + + return open(path, flags); + } + return open(filename, flags); +} +#endif + +FILE *fopen_at(int dir, const char *dirname, const char *filename, int flags, + const char *mode) +{ + int fd = open_at(dir, dirname, filename, flags); + + if (fd < 0) + return NULL; + + return fdopen(fd, mode); +} + +#ifdef HAVE_FSTATAT +ssize_t readlink_at(int dir, const char *dirname __attribute__ ((__unused__)), + const char *pathname, char *buf, size_t bufsiz) +{ + return readlinkat(dir, pathname, buf, bufsiz); +} +#else +ssize_t readlink_at(int dir, const char *dirname, const char *pathname, + char *buf, size_t bufsiz) +{ + if (*pathname != '/') { + char path[PATH_MAX]; + int len; + + len = snprintf(path, sizeof(path), "%s/%s", dirname, pathname); + if (len < 0 || len + 1 > sizeof(path)) + return -1; + + return readlink(path, buf, bufsiz); + } + return readlink(pathname, buf, bufsiz); +} +#endif + +#ifdef TEST_PROGRAM_AT +#include <errno.h> +#include <sys/types.h> +#include <dirent.h> +#include <string.h> + +int main(int argc, char *argv[]) +{ + DIR *dir; + struct dirent *d; + char *dirname; + + if (argc != 2) { + fprintf(stderr, "usage: %s <directory>\n", argv[0]); + exit(EXIT_FAILURE); + } + dirname = argv[1]; + + dir = opendir(dirname); + if (!dir) + err(EXIT_FAILURE, "cannot open %s", dirname); + + while ((d = readdir(dir))) { + struct stat st; + FILE *f; + + printf("%32s ", d->d_name); + + if (fstat_at(dirfd(dir), dirname, d->d_name, &st, 0) == 0) + printf("%16jd bytes ", st.st_size); + else + printf("%16s bytes ", "???"); + + f = fopen_at(dirfd(dir), dirname, d->d_name, O_RDONLY, "r"); + printf(" %s\n", f ? "OK" : strerror(errno)); + if (f) + fclose(f); + } + closedir(dir); + return EXIT_SUCCESS; +} +#endif diff --git a/libblkid/lib/blkdev.c b/libblkid/lib/blkdev.c new file mode 100644 index 000000000..a29352963 --- /dev/null +++ b/libblkid/lib/blkdev.c @@ -0,0 +1,378 @@ +/* + * No copyright is claimed. This code is in the public domain; do with + * it what you wish. + * + * Written by Karel Zak <kzak@redhat.com> + */ +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/ioctl.h> +#include <unistd.h> +#include <stdint.h> + +#ifdef HAVE_LINUX_FD_H +#include <linux/fd.h> +#endif + +#ifdef HAVE_SYS_DISKLABEL_H +#include <sys/disklabel.h> +#endif + +#ifdef HAVE_SYS_DISK_H +#ifdef HAVE_SYS_QUEUE_H +#include <sys/queue.h> /* for LIST_HEAD */ +#endif +#include <sys/disk.h> +#endif + +#ifdef __FreeBSD_kernel__ +#include <sys/disk.h> +#endif + +#include "blkdev.h" +#include "c.h" +#include "linux_version.h" + +static long +blkdev_valid_offset (int fd, off_t offset) { + char ch; + + if (lseek (fd, offset, 0) < 0) + return 0; + if (read (fd, &ch, 1) < 1) + return 0; + return 1; +} + +int is_blkdev(int fd) +{ + struct stat st; + return (fstat(fd, &st) == 0 && S_ISBLK(st.st_mode)); +} + +off_t +blkdev_find_size (int fd) { + uintmax_t high, low = 0; + + for (high = 1024; blkdev_valid_offset (fd, high); ) { + if (high == UINTMAX_MAX) + return -1; + + low = high; + + if (high >= UINTMAX_MAX/2) + high = UINTMAX_MAX; + else + high *= 2; + } + + while (low < high - 1) + { + uintmax_t mid = (low + high) / 2; + + if (blkdev_valid_offset (fd, mid)) + low = mid; + else + high = mid; + } + blkdev_valid_offset (fd, 0); + return (low + 1); +} + +/* get size in bytes */ +int +blkdev_get_size(int fd, unsigned long long *bytes) +{ +#ifdef DKIOCGETBLOCKCOUNT + /* Apple Darwin */ + if (ioctl(fd, DKIOCGETBLOCKCOUNT, bytes) >= 0) { + *bytes <<= 9; + return 0; + } +#endif + +#ifdef BLKGETSIZE64 + { +#ifdef __linux__ + int ver = get_linux_version(); + + /* kernels 2.4.15-2.4.17, had a broken BLKGETSIZE64 */ + if (ver >= KERNEL_VERSION (2,6,0) || + (ver >= KERNEL_VERSION (2,4,18) && ver < KERNEL_VERSION (2,5,0))) +#endif + if (ioctl(fd, BLKGETSIZE64, bytes) >= 0) + return 0; + } +#endif /* BLKGETSIZE64 */ + +#ifdef BLKGETSIZE + { + unsigned long size; + + if (ioctl(fd, BLKGETSIZE, &size) >= 0) { + *bytes = ((unsigned long long)size << 9); + return 0; + } + } + +#endif /* BLKGETSIZE */ + +#ifdef DIOCGMEDIASIZE + /* FreeBSD */ + if (ioctl(fd, DIOCGMEDIASIZE, bytes) >= 0) + return 0; +#endif + +#ifdef FDGETPRM + { + struct floppy_struct this_floppy; + + if (ioctl(fd, FDGETPRM, &this_floppy) >= 0) { + *bytes = this_floppy.size << 9; + return 0; + } + } +#endif /* FDGETPRM */ + +#ifdef HAVE_SYS_DISKLABEL_H + { + /* + * This code works for FreeBSD 4.11 i386, except for the full device + * (such as /dev/ad0). It doesn't work properly for newer FreeBSD + * though. FreeBSD >= 5.0 should be covered by the DIOCGMEDIASIZE + * above however. + * + * Note that FreeBSD >= 4.0 has disk devices as unbuffered (raw, + * character) devices, so we need to check for S_ISCHR, too. + */ + int part = -1; + struct disklabel lab; + struct partition *pp; + char ch; + struct stat st; + + if ((fstat(fd, &st) >= 0) && + (S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode))) + part = st.st_rdev & 7; + + if (part >= 0 && (ioctl(fd, DIOCGDINFO, (char *)&lab) >= 0)) { + pp = &lab.d_partitions[part]; + if (pp->p_size) { + *bytes = pp->p_size << 9; + return 0; + } + } + } +#endif /* HAVE_SYS_DISKLABEL_H */ + + { + struct stat st; + + if (fstat(fd, &st) == 0 && S_ISREG(st.st_mode)) { + *bytes = st.st_size; + return 0; + } + if (!S_ISBLK(st.st_mode)) + return -1; + } + + *bytes = blkdev_find_size(fd); + return 0; +} + +/* get 512-byte sector count */ +int +blkdev_get_sectors(int fd, unsigned long long *sectors) +{ + unsigned long long bytes; + + if (blkdev_get_size(fd, &bytes) == 0) { + *sectors = (bytes >> 9); + return 0; + } + + return -1; +} + +/* + * Get logical sector size. + * + * This is the smallest unit the storage device can + * address. It is typically 512 bytes. + */ +int blkdev_get_sector_size(int fd, int *sector_size) +{ +#ifdef BLKSSZGET + if (ioctl(fd, BLKSSZGET, sector_size) >= 0) + return 0; + return -1; +#else + *sector_size = DEFAULT_SECTOR_SIZE; + return 0; +#endif +} + +/* + * Get physical block device size. The BLKPBSZGET is supported since Linux + * 2.6.32. For old kernels is probably the best to assume that physical sector + * size is the same as logical sector size. + * + * Example: + * + * rc = blkdev_get_physector_size(fd, &physec); + * if (rc || physec == 0) { + * rc = blkdev_get_sector_size(fd, &physec); + * if (rc) + * physec = DEFAULT_SECTOR_SIZE; + * } + */ +int blkdev_get_physector_size(int fd, int *sector_size) +{ +#ifdef BLKPBSZGET + if (ioctl(fd, BLKPBSZGET, §or_size) >= 0) + return 0; + return -1; +#else + *sector_size = DEFAULT_SECTOR_SIZE; + return 0; +#endif +} + +/* + * Return the alignment status of a device + */ +int blkdev_is_misaligned(int fd) +{ +#ifdef BLKALIGNOFF + int aligned; + + if (ioctl(fd, BLKALIGNOFF, &aligned) < 0) + return 0; /* probably kernel < 2.6.32 */ + /* + * Note that kernel returns -1 as alignement offset if no compatible + * sizes and alignments exist for stacked devices + */ + return aligned != 0 ? 1 : 0; +#else + return 0; +#endif +} + +int blkdev_is_cdrom(int fd) +{ +#ifdef CDROM_GET_CAPABILITY + int ret; + + if ((ret = ioctl(fd, CDROM_GET_CAPABILITY, NULL)) < 0) + return 0; + else + return ret; +#else + return 0; +#endif +} + +/* + * Get kernel's interpretation of the device's geometry. + * + * Returns the heads and sectors - but not cylinders + * as it's truncated for disks with more than 65535 tracks. + * + * Note that this is deprecated in favor of LBA addressing. + */ +int blkdev_get_geometry(int fd, unsigned int *h, unsigned int *s) +{ +#ifdef HDIO_GETGEO + struct hd_geometry geometry; + + if (ioctl(fd, HDIO_GETGEO, &geometry) == 0) { + *h = geometry.heads; + *s = geometry.sectors; + return 0; + } +#else + *h = 0; + *s = 0; +#endif + return -1; +} + +/* + * Convert scsi type to human readable string. + */ +const char *blkdev_scsi_type_to_name(int type) +{ + switch (type) { + case SCSI_TYPE_DISK: + return "disk"; + case SCSI_TYPE_TAPE: + return "tape"; + case SCSI_TYPE_PRINTER: + return "printer"; + case SCSI_TYPE_PROCESSOR: + return "processor"; + case SCSI_TYPE_WORM: + return "worm"; + case SCSI_TYPE_ROM: + return "rom"; + case SCSI_TYPE_SCANNER: + return "scanner"; + case SCSI_TYPE_MOD: + return "mo-disk"; + case SCSI_TYPE_MEDIUM_CHANGER: + return "changer"; + case SCSI_TYPE_COMM: + return "comm"; + case SCSI_TYPE_RAID: + return "raid"; + case SCSI_TYPE_ENCLOSURE: + return "enclosure"; + case SCSI_TYPE_RBC: + return "rbc"; + case SCSI_TYPE_OSD: + return "osd"; + case SCSI_TYPE_NO_LUN: + return "no-lun"; + default: + break; + } + return NULL; +} + +#ifdef TEST_PROGRAM_BLKDEV +#include <stdio.h> +#include <stdlib.h> +#include <fcntl.h> +int +main(int argc, char **argv) +{ + unsigned long long bytes; + unsigned long long sectors; + int sector_size, phy_sector_size; + int fd; + + if (argc != 2) { + fprintf(stderr, "usage: %s device\n", argv[0]); + exit(EXIT_FAILURE); + } + + if ((fd = open(argv[1], O_RDONLY|O_CLOEXEC)) < 0) + err(EXIT_FAILURE, "open %s failed", argv[1]); + + if (blkdev_get_size(fd, &bytes) < 0) + err(EXIT_FAILURE, "blkdev_get_size() failed"); + if (blkdev_get_sectors(fd, §ors) < 0) + err(EXIT_FAILURE, "blkdev_get_sectors() failed"); + if (blkdev_get_sector_size(fd, §or_size) < 0) + err(EXIT_FAILURE, "blkdev_get_sector_size() failed"); + if (blkdev_get_physector_size(fd, &phy_sector_size) < 0) + err(EXIT_FAILURE, "blkdev_get_physector_size() failed"); + + printf(" bytes: %llu\n", bytes); + printf(" sectors: %llu\n", sectors); + printf(" sector size: %d\n", sector_size); + printf("phy-sector size: %d\n", phy_sector_size); + + return EXIT_SUCCESS; +} +#endif /* TEST_PROGRAM */ diff --git a/libblkid/lib/canonicalize.c b/libblkid/lib/canonicalize.c new file mode 100644 index 000000000..303703b7c --- /dev/null +++ b/libblkid/lib/canonicalize.c @@ -0,0 +1,145 @@ +/* + * canonicalize.c -- canonicalize pathname by removing symlinks + * + * This file may be distributed under the terms of the + * GNU Lesser General Public License. + * + * Copyright (C) 2009-2013 Karel Zak <kzak@redhat.com> + */ +#include <stdio.h> +#include <string.h> +#include <ctype.h> +#include <unistd.h> +#include <errno.h> +#include <stdlib.h> +#include <sys/types.h> +#include <sys/stat.h> + +#include "canonicalize.h" + +/* + * Converts private "dm-N" names to "/dev/mapper/<name>" + * + * Since 2.6.29 (patch 784aae735d9b0bba3f8b9faef4c8b30df3bf0128) kernel sysfs + * provides the real DM device names in /sys/block/<ptname>/dm/name + */ +char *canonicalize_dm_name(const char *ptname) +{ + FILE *f; + size_t sz; + char path[256], name[256], *res = NULL; + + if (!ptname || !*ptname) + return NULL; + + snprintf(path, sizeof(path), "/sys/block/%s/dm/name", ptname); + if (!(f = fopen(path, "r"))) + return NULL; + + /* read "<name>\n" from sysfs */ + if (fgets(name, sizeof(name), f) && (sz = strlen(name)) > 1) { + name[sz - 1] = '\0'; + snprintf(path, sizeof(path), "/dev/mapper/%s", name); + + if (access(path, F_OK) == 0) + res = strdup(path); + } + fclose(f); + return res; +} + +static int is_dm_devname(char *canonical, char **name) +{ + struct stat sb; + char *p = strrchr(canonical, '/'); + + *name = NULL; + + if (!p + || strncmp(p, "/dm-", 4) != 0 + || !isdigit(*(p + 4)) + || stat(canonical, &sb) != 0 + || !S_ISBLK(sb.st_mode)) + return 0; + + *name = p + 1; + return 1; +} + +char *canonicalize_path(const char *path) +{ + char *canonical, *dmname; + + if (!path || !*path) + return NULL; + + canonical = realpath(path, NULL); + if (!canonical) + return strdup(path); + + if (is_dm_devname(canonical, &dmname)) { + char *dm = canonicalize_dm_name(dmname); + if (dm) { + free(canonical); + return dm; + } + } + + return canonical; +} + +char *canonicalize_path_restricted(const char *path) +{ + char *canonical, *dmname; + int errsv; + uid_t euid; + gid_t egid; + + if (!path || !*path) + return NULL; + + euid = geteuid(); + egid = getegid(); + + /* drop permissions */ + if (setegid(getgid()) < 0 || seteuid(getuid()) < 0) + return NULL; + + errsv = errno = 0; + + canonical = realpath(path, NULL); + if (!canonical) + errsv = errno; + else if (is_dm_devname(canonical, &dmname)) { + char *dm = canonicalize_dm_name(dmname); + if (dm) { + free(canonical); + canonical = dm; + } + } + + /* restore */ + if (setegid(egid) < 0 || seteuid(euid) < 0) { + free(canonical); + return NULL; + } + + errno = errsv; + return canonical; +} + + +#ifdef TEST_PROGRAM_CANONICALIZE +int main(int argc, char **argv) +{ + if (argc < 2) { + fprintf(stderr, "usage: %s <device>\n", argv[0]); + exit(EXIT_FAILURE); + } + + fprintf(stdout, "orig: %s\n", argv[1]); + fprintf(stdout, "real: %s\n", canonicalize_path(argv[1])); + + exit(EXIT_SUCCESS); +} +#endif diff --git a/libblkid/lib/colors.c b/libblkid/lib/colors.c new file mode 100644 index 000000000..6f79ac4a8 --- /dev/null +++ b/libblkid/lib/colors.c @@ -0,0 +1,877 @@ +/* + * Copyright (C) 2012 Ondrej Oprala <ooprala@redhat.com> + * Copyright (C) 2012-2014 Karel Zak <kzak@redhat.com> + * + * This file may be distributed under the terms of the + * GNU Lesser General Public License. + */ +#include <assert.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <dirent.h> +#include <ctype.h> + +#include "c.h" +#include "colors.h" +#include "pathnames.h" +#include "strutils.h" + +#include "debug.h" + +/* + * terminal-colors.d debug stuff + */ +UL_DEBUG_DEFINE_MASK(termcolors); +UL_DEBUG_DEFINE_MASKNAMES(termcolors) = UL_DEBUG_EMPTY_MASKNAMES; + +#define TERMCOLORS_DEBUG_INIT (1 << 1) +#define TERMCOLORS_DEBUG_CONF (1 << 2) +#define TERMCOLORS_DEBUG_SCHEME (1 << 3) +#define TERMCOLORS_DEBUG_ALL 0xFFFF + +#define DBG(m, x) __UL_DBG(termcolors, TERMCOLORS_DEBUG_, m, x) +#define ON_DBG(m, x) __UL_DBG_CALL(termcolors, TERMCOLORS_DEBUG_, m, x) + +/* + * terminal-colors.d file types + */ +enum { + UL_COLORFILE_DISABLE, /* .disable */ + UL_COLORFILE_ENABLE, /* .enable */ + UL_COLORFILE_SCHEME, /* .scheme */ + + __UL_COLORFILE_COUNT +}; + +struct ul_color_scheme { + char *name; + char *seq; +}; + +/* + * Global colors control struct + * + * The terminal-colors.d/ evaluation is based on "scores": + * + * filename score + * --------------------------------------- + * type 1 + * @termname.type 10 + 1 + * utilname.type 20 + 1 + * utilname@termname.type 20 + 10 + 1 + * + * the match with higher score wins. The score is per type. + */ +struct ul_color_ctl { + const char *utilname; /* util name */ + const char *termname; /* terminal name ($TERM) */ + + char *sfile; /* path to scheme */ + + struct ul_color_scheme *schemes; /* array with color schemes */ + size_t nschemes; /* number of the items */ + size_t schemes_sz; /* number of the allocated items */ + + int mode; /* UL_COLORMODE_* */ + unsigned int has_colors : 1, /* based on mode and scores[] */ + disabled : 1, /* disable colors */ + cs_configured : 1, /* color schemes read */ + configured : 1; /* terminal-colors.d parsed */ + + int scores[__UL_COLORFILE_COUNT]; /* the best match */ +}; + +/* + * Control struct, globally shared. + */ +static struct ul_color_ctl ul_colors; + +static void colors_free_schemes(struct ul_color_ctl *cc); +static int colors_read_schemes(struct ul_color_ctl *cc); + +/* + * qsort/bsearch buddy + */ +static int cmp_scheme_name(const void *a0, const void *b0) +{ + struct ul_color_scheme *a = (struct ul_color_scheme *) a0, + *b = (struct ul_color_scheme *) b0; + return strcmp(a->name, b->name); +} + +/* + * Maintains human readable color names + */ +const char *color_sequence_from_colorname(const char *str) +{ + static const struct ul_color_scheme basic_schemes[] = { + { "black", UL_COLOR_BLACK }, + { "blue", UL_COLOR_BLUE }, + { "brown", UL_COLOR_BROWN }, + { "cyan", UL_COLOR_CYAN }, + { "darkgray", UL_COLOR_DARK_GRAY }, + { "gray", UL_COLOR_GRAY }, + { "green", UL_COLOR_GREEN }, + { "lightblue", UL_COLOR_BOLD_BLUE }, + { "lightcyan", UL_COLOR_BOLD_CYAN }, + { "lightgray,", UL_COLOR_GRAY }, + { "lightgreen", UL_COLOR_BOLD_GREEN }, + { "lightmagenta", UL_COLOR_BOLD_MAGENTA }, + { "lightred", UL_COLOR_BOLD_RED }, + { "magenta", UL_COLOR_MAGENTA }, + { "red", UL_COLOR_RED }, + { "yellow", UL_COLOR_BOLD_YELLOW }, + }; + struct ul_color_scheme key = { .name = (char *) str }, *res; + + if (!str) + return NULL; + + res = bsearch(&key, basic_schemes, ARRAY_SIZE(basic_schemes), + sizeof(struct ul_color_scheme), + cmp_scheme_name); + return res ? res->seq : NULL; +} + + +/* + * Resets control struct (note that we don't allocate the struct) + */ +static void colors_reset(struct ul_color_ctl *cc) +{ + if (!cc) + return; + + colors_free_schemes(cc); + + free(cc->sfile); + + cc->sfile = NULL; + cc->utilname = NULL; + cc->termname = NULL; + cc->mode = UL_COLORMODE_UNDEF; + + memset(cc->scores, 0, sizeof(cc->scores)); +} + +static void colors_debug(struct ul_color_ctl *cc) +{ + size_t i; + + if (!cc) + return; + + printf("Colors:\n"); + printf("\tutilname = '%s'\n", cc->utilname); + printf("\ttermname = '%s'\n", cc->termname); + printf("\tscheme file = '%s'\n", cc->sfile); + printf("\tmode = %s\n", + cc->mode == UL_COLORMODE_UNDEF ? "undefined" : + cc->mode == UL_COLORMODE_AUTO ? "auto" : + cc->mode == UL_COLORMODE_NEVER ? "never" : + cc->mode == UL_COLORMODE_ALWAYS ? "always" : "???"); + printf("\thas_colors = %d\n", cc->has_colors); + printf("\tdisabled = %d\n", cc->disabled); + printf("\tconfigured = %d\n", cc->configured); + printf("\tcs configured = %d\n", cc->cs_configured); + + fputc('\n', stdout); + + for (i = 0; i < ARRAY_SIZE(cc->scores); i++) + printf("\tscore %s = %d\n", + i == UL_COLORFILE_DISABLE ? "disable" : + i == UL_COLORFILE_ENABLE ? "enable" : + i == UL_COLORFILE_SCHEME ? "scheme" : "???", + cc->scores[i]); + + fputc('\n', stdout); + + for (i = 0; i < cc->nschemes; i++) { + printf("\tscheme #%02zu ", i); + color_scheme_enable(cc->schemes[i].name, NULL); + fputs(cc->schemes[i].name, stdout); + color_disable(); + fputc('\n', stdout); + } + fputc('\n', stdout); +} + +/* + * Parses [[<utilname>][@<termname>].]<type> + */ +static int filename_to_tokens(const char *str, + const char **name, size_t *namesz, + const char **term, size_t *termsz, + int *filetype) +{ + const char *type_start, *term_start, *p; + + if (!str || !*str || *str == '.' || strlen(str) > PATH_MAX) + return -EINVAL; + + /* parse .type */ + p = strrchr(str, '.'); + type_start = p ? p + 1 : str; + + if (strcmp(type_start, "disable") == 0) + *filetype = UL_COLORFILE_DISABLE; + else if (strcmp(type_start, "enable") == 0) + *filetype = UL_COLORFILE_ENABLE; + else if (strcmp(type_start, "scheme") == 0) + *filetype = UL_COLORFILE_SCHEME; + else { + DBG(CONF, ul_debug("unknown type '%s'", type_start)); + return 1; /* unknown type */ + } + + if (type_start == str) + return 0; /* "type" only */ + + /* parse @termname */ + p = strchr(str, '@'); + term_start = p ? p + 1 : NULL; + if (term_start) { + *term = term_start; + *termsz = type_start - term_start - 1; + if (term_start - 1 == str) + return 0; /* "@termname.type" */ + } + + /* parse utilname */ + p = term_start ? term_start : type_start; + *name = str; + *namesz = p - str - 1; + + return 0; +} + +/* + * Scans @dirname and select the best matches for UL_COLORFILE_* types. + * The result is stored to cc->scores. The path to the best "scheme" + * file is stored to cc->scheme. + */ +static int colors_readdir(struct ul_color_ctl *cc, const char *dirname) +{ + DIR *dir; + int rc = 0; + struct dirent *d; + char sfile[PATH_MAX] = { '\0' }; + size_t namesz, termsz; + + if (!dirname || !cc || !cc->utilname || !*cc->utilname) + return -EINVAL; + + DBG(CONF, ul_debug("reading dir: '%s'", dirname)); + + dir = opendir(dirname); + if (!dir) + return -errno; + + namesz = strlen(cc->utilname); + termsz = cc->termname ? strlen(cc->termname) : 0; + + while ((d = readdir(dir))) { + int type, score = 1; + const char *tk_name = NULL, *tk_term = NULL; + size_t tk_namesz = 0, tk_termsz = 0; + + if (*d->d_name == '.') + continue; +#ifdef _DIRENT_HAVE_D_TYPE + if (d->d_type != DT_UNKNOWN && d->d_type != DT_LNK && + d->d_type != DT_REG) + continue; +#endif + if (filename_to_tokens(d->d_name, + &tk_name, &tk_namesz, + &tk_term, &tk_termsz, &type) != 0) + continue; + + /* count teoretical score before we check names to avoid + * unnecessary strcmp() */ + if (tk_name) + score += 20; + if (tk_term) + score += 10; + + DBG(CONF, ul_debug("item '%s': score=%d " + "[cur: %d, name(%zu): %s, term(%zu): %s]", + d->d_name, score, cc->scores[type], + tk_namesz, tk_name, + tk_termsz, tk_term)); + + + if (score < cc->scores[type]) + continue; + + /* filter out by names */ + if (tk_namesz && (tk_namesz != namesz || + strncmp(tk_name, cc->utilname, namesz) != 0)) + continue; + + if (tk_termsz && (termsz == 0 || tk_termsz != termsz || + strncmp(tk_term, cc->termname, termsz) != 0)) + continue; + + DBG(CONF, ul_debug("setting '%s' from %d -to-> %d", + type == UL_COLORFILE_SCHEME ? "scheme" : + type == UL_COLORFILE_DISABLE ? "disable" : + type == UL_COLORFILE_ENABLE ? "enable" : "???", + cc->scores[type], score)); + cc->scores[type] = score; + if (type == UL_COLORFILE_SCHEME) + strncpy(sfile, d->d_name, sizeof(sfile)); + } + + if (*sfile) { + sfile[sizeof(sfile) - 1] = '\0'; + if (asprintf(&cc->sfile, "%s/%s", dirname, sfile) <= 0) + rc = -ENOMEM; + } + + closedir(dir); + return rc; +} + +/* atexit() wrapper */ +static void colors_deinit(void) +{ + colors_reset(&ul_colors); +} + +/* + * Returns path to $XDG_CONFIG_HOME/terminal-colors.d + */ +static char *colors_get_homedir(char *buf, size_t bufsz) +{ + char *p = getenv("XDG_CONFIG_HOME"); + + if (p) { + snprintf(buf, bufsz, "%s/" _PATH_TERMCOLORS_DIRNAME, p); + return buf; + } + + p = getenv("HOME"); + if (p) { + snprintf(buf, bufsz, "%s/.config/" _PATH_TERMCOLORS_DIRNAME, p); + return buf; + } + + return NULL; +} + +/* canonicalize sequence */ +static int cn_sequence(const char *str, char **seq) +{ + char *in, *out; + + if (!str) + return -EINVAL; + + *seq = NULL; + + /* convert logical names like "red" to the real sequence */ + if (*str != '\\' && isalpha(*str)) { + const char *s = color_sequence_from_colorname(str); + *seq = strdup(s ? s : str); + + return *seq ? 0 : -ENOMEM; + } + + /* convert xx;yy sequences to "\033[xx;yy" */ + if (asprintf(seq, "\033[%sm", str) < 1) + return -ENOMEM; + + for (in = *seq, out = *seq; in && *in; in++) { + if (*in != '\\') { + *out++ = *in; + continue; + } + switch(*(in + 1)) { + case 'a': + *out++ = '\a'; /* Bell */ + break; + case 'b': + *out++ = '\b'; /* Backspace */ + break; + case 'e': + *out++ = '\033'; /* Escape */ + break; + case 'f': + *out++ = '\f'; /* Form Feed */ + break; + case 'n': + *out++ = '\n'; /* Newline */ + break; + case 'r': + *out++ = '\r'; /* Carriage Return */ + break; + case 't': + *out++ = '\t'; /* Tab */ + break; + case 'v': + *out++ = '\v'; /* Vertical Tab */ + break; + case '\\': + *out++ = '\\'; /* Backslash */ + break; + case '_': + *out++ = ' '; /* Space */ + break; + case '#': + *out++ = '#'; /* Hash mark */ + break; + case '?': + *out++ = '?'; /* Qestion mark */ + break; + default: + *out++ = *in; + *out++ = *(in + 1); + break; + } + in++; + } + *out = '\0'; + + return 0; +} + + +/* + * Adds one color sequence to array with color scheme. + * When returning success (0) this function takes ownership of + * @seq and @name, which have to be allocated strings. + */ +static int colors_add_scheme(struct ul_color_ctl *cc, + char *name, + char *seq0) +{ + struct ul_color_scheme *cs = NULL; + char *seq = NULL; + int rc; + + if (!cc || !name || !*name || !seq0 || !*seq0) + return -EINVAL; + + DBG(SCHEME, ul_debug("add '%s'", name)); + + rc = cn_sequence(seq0, &seq); + if (rc) + return rc; + + rc = -ENOMEM; + + /* convert logical name (e.g. "red") to real ESC code */ + if (isalpha(*seq)) { + const char *s = color_sequence_from_colorname(seq); + char *p; + + if (!s) { + DBG(SCHEME, ul_debug("unknown logical name: %s", seq)); + rc = -EINVAL; + goto err; + } + + p = strdup(s); + if (!p) + goto err; + free(seq); + seq = p; + } + + /* enlarge the array */ + if (cc->nschemes == cc->schemes_sz) { + void *tmp = realloc(cc->schemes, (cc->nschemes + 10) + * sizeof(struct ul_color_scheme)); + if (!tmp) + goto err; + cc->schemes = tmp; + cc->schemes_sz = cc->nschemes + 10; + } + + /* add a new item */ + cs = &cc->schemes[cc->nschemes]; + cs->seq = seq; + cs->name = strdup(name); + if (!cs->name) + goto err; + + cc->nschemes++; + return 0; +err: + if (cs) { + free(cs->seq); + free(cs->name); + cs->seq = cs->name = NULL; + } else + free(seq); + return rc; +} + +/* + * Deallocates all regards to color schemes + */ +static void colors_free_schemes(struct ul_color_ctl *cc) +{ + size_t i; + + DBG(SCHEME, ul_debug("free scheme")); + + for (i = 0; i < cc->nschemes; i++) { + free(cc->schemes[i].name); + free(cc->schemes[i].seq); + } + + free(cc->schemes); + cc->schemes = NULL; + cc->nschemes = 0; + cc->schemes_sz = 0; +} + +/* + * The scheme configuration has to be sorted for bsearch + */ +static void colors_sort_schemes(struct ul_color_ctl *cc) +{ + if (!cc->nschemes) + return; + + DBG(SCHEME, ul_debug("sort scheme")); + + qsort(cc->schemes, cc->nschemes, + sizeof(struct ul_color_scheme), cmp_scheme_name); +} + +/* + * Returns just one color scheme + */ +static struct ul_color_scheme *colors_get_scheme(struct ul_color_ctl *cc, + const char *name) +{ + struct ul_color_scheme key = { .name = (char *) name}, *res; + + if (!cc || !name || !*name) + return NULL; + + if (!cc->cs_configured) { + int rc = colors_read_schemes(cc); + if (rc) + return NULL; + } + if (!cc->nschemes) + return NULL; + + DBG(SCHEME, ul_debug("search '%s'", name)); + + res = bsearch(&key, cc->schemes, cc->nschemes, + sizeof(struct ul_color_scheme), + cmp_scheme_name); + + return res && res->seq ? res : NULL; +} + +/* + * Parses filenames in terminal-colors.d + */ +static int colors_read_configuration(struct ul_color_ctl *cc) +{ + int rc = -ENOENT; + char *dirname, buf[PATH_MAX]; + + cc->termname = getenv("TERM"); + + dirname = colors_get_homedir(buf, sizeof(buf)); + if (dirname) + rc = colors_readdir(cc, dirname); /* ~/.config */ + if (rc == -EPERM || rc == -EACCES || rc == -ENOENT) + rc = colors_readdir(cc, _PATH_TERMCOLORS_DIR); /* /etc */ + + cc->configured = 1; + return rc; +} + +/* + * Reads terminal-colors.d/ scheme file into array schemes + */ +static int colors_read_schemes(struct ul_color_ctl *cc) +{ + int rc = 0; + FILE *f = NULL; + char buf[BUFSIZ], + cn[129], seq[129]; + + if (!cc->configured) + rc = colors_read_configuration(cc); + + cc->cs_configured = 1; + + if (rc || !cc->sfile) + goto done; + + DBG(SCHEME, ul_debug("reading file '%s'", cc->sfile)); + + f = fopen(cc->sfile, "r"); + if (!f) { + rc = -errno; + goto done; + } + + while (fgets(buf, sizeof(buf), f)) { + char *p = strchr(buf, '\n'); + + if (!p) { + if (feof(f)) + p = strchr(buf, '\0'); + else { + rc = -errno; + goto done; + } + } + *p = '\0'; + p = (char *) skip_blank(buf); + if (*p == '\0' || *p == '#') + continue; + + rc = sscanf(p, "%128[^ ] %128[^\n ]", cn, seq); + if (rc == 2 && *cn && *seq) { + rc = colors_add_scheme(cc, cn, seq); /* set rc=0 on success */ + if (rc) + goto done; + } + } + rc = 0; + +done: + if (f) + fclose(f); + colors_sort_schemes(cc); + + return rc; +} + + +static void termcolors_init_debug(void) +{ + __UL_INIT_DEBUG(termcolors, TERMCOLORS_DEBUG_, 0, TERMINAL_COLORS_DEBUG); +} + +/** + * colors_init: + * @mode: UL_COLORMODE_* + * @name: util argv[0] + * + * Initialize private color control struct and initialize the colors + * status. The color schemes are parsed on demand by colors_get_scheme(). + * + * Returns: >0 on success. + */ +int colors_init(int mode, const char *name) +{ + int atty = -1; + struct ul_color_ctl *cc = &ul_colors; + + cc->utilname = name; + cc->mode = mode; + + termcolors_init_debug(); + + if (mode == UL_COLORMODE_UNDEF && (atty = isatty(STDOUT_FILENO))) { + int rc = colors_read_configuration(cc); + if (rc) + cc->mode = UL_COLORMODE_AUTO; + else { + + /* evaluate scores */ + if (cc->scores[UL_COLORFILE_DISABLE] > + cc->scores[UL_COLORFILE_ENABLE]) + cc->mode = UL_COLORMODE_NEVER; + else + cc->mode = UL_COLORMODE_AUTO; + + atexit(colors_deinit); + } + } + + switch (cc->mode) { + case UL_COLORMODE_AUTO: + cc->has_colors = atty == -1 ? isatty(STDOUT_FILENO) : atty; + break; + case UL_COLORMODE_ALWAYS: + cc->has_colors = 1; + break; + case UL_COLORMODE_NEVER: + default: + cc->has_colors = 0; + } + + ON_DBG(CONF, colors_debug(cc)); + + return cc->has_colors; +} + +/* + * Temporary disable colors (this setting is independent on terminal-colors.d/) + */ +void colors_off(void) +{ + ul_colors.disabled = 1; +} + +/* + * Enable colors + */ +void colors_on(void) +{ + ul_colors.disabled = 0; +} + +/* + * Is terminal-colors.d/ configured to use colors? + */ +int colors_wanted(void) +{ + return ul_colors.has_colors; +} + +/* + * Enable @seq color + */ +void color_fenable(const char *seq, FILE *f) +{ + if (!ul_colors.disabled && ul_colors.has_colors && seq) + fputs(seq, f); +} + +/* + * Returns escape sequence by logical @name, if undefined then returns @dflt. + */ +const char *color_scheme_get_sequence(const char *name, const char *dflt) +{ + struct ul_color_scheme *cs; + + if (ul_colors.disabled || !ul_colors.has_colors) + return NULL; + + cs = colors_get_scheme(&ul_colors, name); + return cs && cs->seq ? cs->seq : dflt; +} + +/* + * Enable color by logical @name, if undefined enable @dflt. + */ +void color_scheme_fenable(const char *name, const char *dflt, FILE *f) +{ + const char *seq = color_scheme_get_sequence(name, dflt); + + if (!seq) + return; + color_fenable(seq, f); +} + + +/* + * Disable previously enabled color + */ +void color_fdisable(FILE *f) +{ + if (!ul_colors.disabled && ul_colors.has_colors) + fputs(UL_COLOR_RESET, f); +} + +/* + * Parses @str to return UL_COLORMODE_* + */ +int colormode_from_string(const char *str) +{ + size_t i; + static const char *modes[] = { + [UL_COLORMODE_AUTO] = "auto", + [UL_COLORMODE_NEVER] = "never", + [UL_COLORMODE_ALWAYS] = "always", + [UL_COLORMODE_UNDEF] = "" + }; + + if (!str || !*str) + return -EINVAL; + + assert(ARRAY_SIZE(modes) == __UL_NCOLORMODES); + + for (i = 0; i < ARRAY_SIZE(modes); i++) { + if (strcasecmp(str, modes[i]) == 0) + return i; + } + + return -EINVAL; +} + +/* + * Parses @str and exit(EXIT_FAILURE) on error + */ +int colormode_or_err(const char *str, const char *errmsg) +{ + const char *p = str && *str == '=' ? str + 1 : str; + int colormode; + + colormode = colormode_from_string(p); + if (colormode < 0) + errx(EXIT_FAILURE, "%s: '%s'", errmsg, p); + + return colormode; +} + +#ifdef TEST_PROGRAM +# include <getopt.h> +int main(int argc, char *argv[]) +{ + static const struct option longopts[] = { + { "mode", required_argument, 0, 'm' }, + { "color", required_argument, 0, 'c' }, + { "color-scheme", required_argument, 0, 'C' }, + { "name", required_argument, 0, 'n' }, + { NULL, 0, 0, 0 } + }; + int c, mode = UL_COLORMODE_UNDEF; /* default */ + const char *color = "red", *name = NULL, *color_scheme = NULL; + const char *seq = NULL; + + while ((c = getopt_long(argc, argv, "C:c:m:n:", longopts, NULL)) != -1) { + switch (c) { + case 'c': + color = optarg; + break; + case 'C': + color_scheme = optarg; + break; + case 'm': + mode = colormode_or_err(optarg, "unsupported color mode"); + break; + case 'n': + name = optarg; + break; + default: + fprintf(stderr, "usage: %s [options]\n" + " -m, --mode <auto|never|always> default is undefined\n" + " -c, --color <red|blue|...> color for the test message\n" + " -C, --color-scheme <name> color for the test message\n" + " -n, --name <utilname> util name\n", + program_invocation_short_name); + return EXIT_FAILURE; + } + } + + colors_init(mode, name ? name : program_invocation_short_name); + + seq = color_sequence_from_colorname(color); + + if (color_scheme) + color_scheme_enable(color_scheme, seq); + else + color_enable(seq); + printf("Hello World!"); + color_disable(); + fputc('\n', stdout); + + return EXIT_SUCCESS; +} +#endif + diff --git a/libblkid/lib/cpuset.c b/libblkid/lib/cpuset.c new file mode 100644 index 000000000..d715720e3 --- /dev/null +++ b/libblkid/lib/cpuset.c @@ -0,0 +1,403 @@ +/* + * Terminology: + * + * cpuset - (libc) cpu_set_t data structure represents set of CPUs + * cpumask - string with hex mask (e.g. "0x00000001") + * cpulist - string with CPU ranges (e.g. "0-3,5,7,8") + * + * Based on code from taskset.c and Linux kernel. + * + * This file may be redistributed under the terms of the + * GNU Lesser General Public License. + * + * Copyright (C) 2010 Karel Zak <kzak@redhat.com> + */ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <sched.h> +#include <errno.h> +#include <string.h> +#include <ctype.h> +#include <sys/syscall.h> + +#include "cpuset.h" +#include "c.h" + +static inline int val_to_char(int v) +{ + if (v >= 0 && v < 10) + return '0' + v; + else if (v >= 10 && v < 16) + return ('a' - 10) + v; + else + return -1; +} + +static inline int char_to_val(int c) +{ + int cl; + + cl = tolower(c); + if (c >= '0' && c <= '9') + return c - '0'; + else if (cl >= 'a' && cl <= 'f') + return cl + (10 - 'a'); + else + return -1; +} + +static const char *nexttoken(const char *q, int sep) +{ + if (q) + q = strchr(q, sep); + if (q) + q++; + return q; +} + +/* + * Number of bits in a CPU bitmask on current system + */ +int get_max_number_of_cpus(void) +{ +#ifdef SYS_sched_getaffinity + int n, cpus = 2048; + size_t setsize; + cpu_set_t *set = cpuset_alloc(cpus, &setsize, NULL); + + if (!set) + return -1; /* error */ + + for (;;) { + CPU_ZERO_S(setsize, set); + + /* the library version does not return size of cpumask_t */ + n = syscall(SYS_sched_getaffinity, 0, setsize, set); + + if (n < 0 && errno == EINVAL && cpus < 1024 * 1024) { + cpuset_free(set); + cpus *= 2; + set = cpuset_alloc(cpus, &setsize, NULL); + if (!set) + return -1; /* error */ + continue; + } + cpuset_free(set); + return n * 8; + } +#endif + return -1; +} + +/* + * Allocates a new set for ncpus and returns size in bytes and size in bits + */ +cpu_set_t *cpuset_alloc(int ncpus, size_t *setsize, size_t *nbits) +{ + cpu_set_t *set = CPU_ALLOC(ncpus); + + if (!set) + return NULL; + if (setsize) + *setsize = CPU_ALLOC_SIZE(ncpus); + if (nbits) + *nbits = cpuset_nbits(CPU_ALLOC_SIZE(ncpus)); + return set; +} + +void cpuset_free(cpu_set_t *set) +{ + CPU_FREE(set); +} + +#if !HAVE_DECL_CPU_ALLOC +/* Please, use CPU_COUNT_S() macro. This is fallback */ +int __cpuset_count_s(size_t setsize, const cpu_set_t *set) +{ + int s = 0; + const __cpu_mask *p = set->__bits; + const __cpu_mask *end = &set->__bits[setsize / sizeof (__cpu_mask)]; + + while (p < end) { + __cpu_mask l = *p++; + + if (l == 0) + continue; +# if LONG_BIT > 32 + l = (l & 0x5555555555555555ul) + ((l >> 1) & 0x5555555555555555ul); + l = (l & 0x3333333333333333ul) + ((l >> 2) & 0x3333333333333333ul); + l = (l & 0x0f0f0f0f0f0f0f0ful) + ((l >> 4) & 0x0f0f0f0f0f0f0f0ful); + l = (l & 0x00ff00ff00ff00fful) + ((l >> 8) & 0x00ff00ff00ff00fful); + l = (l & 0x0000ffff0000fffful) + ((l >> 16) & 0x0000ffff0000fffful); + l = (l & 0x00000000fffffffful) + ((l >> 32) & 0x00000000fffffffful); +# else + l = (l & 0x55555555ul) + ((l >> 1) & 0x55555555ul); + l = (l & 0x33333333ul) + ((l >> 2) & 0x33333333ul); + l = (l & 0x0f0f0f0ful) + ((l >> 4) & 0x0f0f0f0ful); + l = (l & 0x00ff00fful) + ((l >> 8) & 0x00ff00fful); + l = (l & 0x0000fffful) + ((l >> 16) & 0x0000fffful); +# endif + s += l; + } + return s; +} +#endif + +/* + * Returns human readable representation of the cpuset. The output format is + * a list of CPUs with ranges (for example, "0,1,3-9"). + */ +char *cpulist_create(char *str, size_t len, + cpu_set_t *set, size_t setsize) +{ + size_t i; + char *ptr = str; + int entry_made = 0; + size_t max = cpuset_nbits(setsize); + + for (i = 0; i < max; i++) { + if (CPU_ISSET_S(i, setsize, set)) { + int rlen; + size_t j, run = 0; + entry_made = 1; + for (j = i + 1; j < max; j++) { + if (CPU_ISSET_S(j, setsize, set)) + run++; + else + break; + } + if (!run) + rlen = snprintf(ptr, len, "%zd,", i); + else if (run == 1) { + rlen = snprintf(ptr, len, "%zd,%zd,", i, i + 1); + i++; + } else { + rlen = snprintf(ptr, len, "%zd-%zd,", i, i + run); + i += run; + } + if (rlen < 0 || (size_t) rlen + 1 > len) + return NULL; + ptr += rlen; + if (rlen > 0 && len > (size_t) rlen) + len -= rlen; + else + len = 0; + } + } + ptr -= entry_made; + *ptr = '\0'; + + return str; +} + +/* + * Returns string with CPU mask. + */ +char *cpumask_create(char *str, size_t len, + cpu_set_t *set, size_t setsize) +{ + char *ptr = str; + char *ret = NULL; + int cpu; + + for (cpu = cpuset_nbits(setsize) - 4; cpu >= 0; cpu -= 4) { + char val = 0; + + if (len == (size_t) (ptr - str)) + break; + + if (CPU_ISSET_S(cpu, setsize, set)) + val |= 1; + if (CPU_ISSET_S(cpu + 1, setsize, set)) + val |= 2; + if (CPU_ISSET_S(cpu + 2, setsize, set)) + val |= 4; + if (CPU_ISSET_S(cpu + 3, setsize, set)) + val |= 8; + + if (!ret && val) + ret = ptr; + *ptr++ = val_to_char(val); + } + *ptr = '\0'; + return ret ? ret : ptr - 1; +} + +/* + * Parses string with CPUs mask. + */ +int cpumask_parse(const char *str, cpu_set_t *set, size_t setsize) +{ + int len = strlen(str); + const char *ptr = str + len - 1; + int cpu = 0; + + /* skip 0x, it's all hex anyway */ + if (len > 1 && !memcmp(str, "0x", 2L)) + str += 2; + + CPU_ZERO_S(setsize, set); + + while (ptr >= str) { + char val; + + /* cpu masks in /sys uses comma as a separator */ + if (*ptr == ',') + ptr--; + + val = char_to_val(*ptr); + if (val == (char) -1) + return -1; + if (val & 1) + CPU_SET_S(cpu, setsize, set); + if (val & 2) + CPU_SET_S(cpu + 1, setsize, set); + if (val & 4) + CPU_SET_S(cpu + 2, setsize, set); + if (val & 8) + CPU_SET_S(cpu + 3, setsize, set); + len--; + ptr--; + cpu += 4; + } + + return 0; +} + +/* + * Parses string with list of CPU ranges. + * Returns 0 on success. + * Returns 1 on error. + * Returns 2 if fail is set and a cpu number passed in the list doesn't fit + * into the cpu_set. If fail is not set cpu numbers that do not fit are + * ignored and 0 is returned instead. + */ +int cpulist_parse(const char *str, cpu_set_t *set, size_t setsize, int fail) +{ + size_t max = cpuset_nbits(setsize); + const char *p, *q; + int r = 0; + + q = str; + CPU_ZERO_S(setsize, set); + + while (p = q, q = nexttoken(q, ','), p) { + unsigned int a; /* beginning of range */ + unsigned int b; /* end of range */ + unsigned int s; /* stride */ + const char *c1, *c2; + char c; + + if ((r = sscanf(p, "%u%c", &a, &c)) < 1) + return 1; + b = a; + s = 1; + + c1 = nexttoken(p, '-'); + c2 = nexttoken(p, ','); + if (c1 != NULL && (c2 == NULL || c1 < c2)) { + if ((r = sscanf(c1, "%u%c", &b, &c)) < 1) + return 1; + c1 = nexttoken(c1, ':'); + if (c1 != NULL && (c2 == NULL || c1 < c2)) { + if ((r = sscanf(c1, "%u%c", &s, &c)) < 1) + return 1; + if (s == 0) + return 1; + } + } + + if (!(a <= b)) + return 1; + while (a <= b) { + if (fail && (a >= max)) + return 2; + CPU_SET_S(a, setsize, set); + a += s; + } + } + + if (r == 2) + return 1; + return 0; +} + +#ifdef TEST_PROGRAM + +#include <getopt.h> + +int main(int argc, char *argv[]) +{ + cpu_set_t *set; + size_t setsize, buflen, nbits; + char *buf, *mask = NULL, *range = NULL; + int ncpus = 2048, rc, c; + + static const struct option longopts[] = { + { "ncpus", 1, 0, 'n' }, + { "mask", 1, 0, 'm' }, + { "range", 1, 0, 'r' }, + { NULL, 0, 0, 0 } + }; + + while ((c = getopt_long(argc, argv, "n:m:r:", longopts, NULL)) != -1) { + switch(c) { + case 'n': + ncpus = atoi(optarg); + break; + case 'm': + mask = strdup(optarg); + break; + case 'r': + range = strdup(optarg); + break; + default: + goto usage_err; + } + } + + if (!mask && !range) + goto usage_err; + + set = cpuset_alloc(ncpus, &setsize, &nbits); + if (!set) + err(EXIT_FAILURE, "failed to allocate cpu set"); + + /* + fprintf(stderr, "ncpus: %d, cpuset bits: %zd, cpuset bytes: %zd\n", + ncpus, nbits, setsize); + */ + + buflen = 7 * nbits; + buf = malloc(buflen); + if (!buf) + err(EXIT_FAILURE, "failed to allocate cpu set buffer"); + + if (mask) + rc = cpumask_parse(mask, set, setsize); + else + rc = cpulist_parse(range, set, setsize, 0); + + if (rc) + errx(EXIT_FAILURE, "failed to parse string: %s", mask ? : range); + + printf("%-15s = %15s ", mask ? : range, + cpumask_create(buf, buflen, set, setsize)); + printf("[%s]\n", cpulist_create(buf, buflen, set, setsize)); + + free(buf); + free(mask); + free(range); + cpuset_free(set); + + return EXIT_SUCCESS; + +usage_err: + fprintf(stderr, + "usage: %s [--ncpus <num>] --mask <mask> | --range <list>", + program_invocation_short_name); + exit(EXIT_FAILURE); +} +#endif diff --git a/libblkid/lib/crc32.c b/libblkid/lib/crc32.c new file mode 100644 index 000000000..be98f1a8d --- /dev/null +++ b/libblkid/lib/crc32.c @@ -0,0 +1,118 @@ +/* + * COPYRIGHT (C) 1986 Gary S. Brown. You may use this program, or + * code or tables extracted from it, as desired without restriction. + * + * First, the polynomial itself and its table of feedback terms. The + * polynomial is + * X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0 + * + * Note that we take it "backwards" and put the highest-order term in + * the lowest-order bit. The X^32 term is "implied"; the LSB is the + * X^31 term, etc. The X^0 term (usually shown as "+1") results in + * the MSB being 1. + * + * Note that the usual hardware shift register implementation, which + * is what we're using (we're merely optimizing it by doing eight-bit + * chunks at a time) shifts bits into the lowest-order term. In our + * implementation, that means shifting towards the right. Why do we + * do it this way? Because the calculated CRC must be transmitted in + * order from highest-order term to lowest-order term. UARTs transmit + * characters in order from LSB to MSB. By storing the CRC this way, + * we hand it to the UART in the order low-byte to high-byte; the UART + * sends each low-bit to hight-bit; and the result is transmission bit + * by bit from highest- to lowest-order term without requiring any bit + * shuffling on our part. Reception works similarly. + * + * The feedback terms table consists of 256, 32-bit entries. Notes + * + * The table can be generated at runtime if desired; code to do so + * is shown later. It might not be obvious, but the feedback + * terms simply represent the results of eight shift/xor opera- + * tions for all combinations of data and CRC register values. + * + * The values must be right-shifted by eight bits by the "updcrc" + * logic; the shift must be unsigned (bring in zeroes). On some + * hardware you could probably optimize the shift in assembler by + * using byte-swap instructions. + * polynomial $edb88320 + * + */ + +#include <stdio.h> + +#include "crc32.h" + + +static const uint32_t crc32_tab[] = { + 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L, + 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L, + 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L, + 0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL, + 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L, + 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L, + 0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L, + 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL, + 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L, + 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL, + 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L, + 0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L, + 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L, + 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL, + 0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL, + 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L, + 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL, + 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L, + 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L, + 0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L, + 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL, + 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L, + 0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L, + 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL, + 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L, + 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L, + 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L, + 0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L, + 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L, + 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL, + 0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL, + 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L, + 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L, + 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL, + 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL, + 0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L, + 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL, + 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L, + 0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL, + 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L, + 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL, + 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L, + 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L, + 0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL, + 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L, + 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L, + 0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L, + 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L, + 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L, + 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L, + 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL, + 0x2d02ef8dL +}; + +/* + * This a generic crc32() function, it takes seed as an argument, + * and does __not__ xor at the end. Then individual users can do + * whatever they need. + */ +uint32_t crc32(uint32_t seed, const unsigned char *buf, size_t len) +{ + uint32_t crc = seed; + const unsigned char *p = buf; + + while (len) { + crc = crc32_tab[(crc ^ *p++) & 0xff] ^ (crc >> 8); + len--; + } + + return crc; +} + diff --git a/libblkid/lib/crc64.c b/libblkid/lib/crc64.c new file mode 100644 index 000000000..0be78e63b --- /dev/null +++ b/libblkid/lib/crc64.c @@ -0,0 +1,109 @@ +#include "crc64.h" + +static const uint64_t crc64_tab[256] = { + 0x0000000000000000ULL, 0x42F0E1EBA9EA3693ULL, 0x85E1C3D753D46D26ULL, + 0xC711223CFA3E5BB5ULL, 0x493366450E42ECDFULL, 0x0BC387AEA7A8DA4CULL, + 0xCCD2A5925D9681F9ULL, 0x8E224479F47CB76AULL, 0x9266CC8A1C85D9BEULL, + 0xD0962D61B56FEF2DULL, 0x17870F5D4F51B498ULL, 0x5577EEB6E6BB820BULL, + 0xDB55AACF12C73561ULL, 0x99A54B24BB2D03F2ULL, 0x5EB4691841135847ULL, + 0x1C4488F3E8F96ED4ULL, 0x663D78FF90E185EFULL, 0x24CD9914390BB37CULL, + 0xE3DCBB28C335E8C9ULL, 0xA12C5AC36ADFDE5AULL, 0x2F0E1EBA9EA36930ULL, + 0x6DFEFF5137495FA3ULL, 0xAAEFDD6DCD770416ULL, 0xE81F3C86649D3285ULL, + 0xF45BB4758C645C51ULL, 0xB6AB559E258E6AC2ULL, 0x71BA77A2DFB03177ULL, + 0x334A9649765A07E4ULL, 0xBD68D2308226B08EULL, 0xFF9833DB2BCC861DULL, + 0x388911E7D1F2DDA8ULL, 0x7A79F00C7818EB3BULL, 0xCC7AF1FF21C30BDEULL, + 0x8E8A101488293D4DULL, 0x499B3228721766F8ULL, 0x0B6BD3C3DBFD506BULL, + 0x854997BA2F81E701ULL, 0xC7B97651866BD192ULL, 0x00A8546D7C558A27ULL, + 0x4258B586D5BFBCB4ULL, 0x5E1C3D753D46D260ULL, 0x1CECDC9E94ACE4F3ULL, + 0xDBFDFEA26E92BF46ULL, 0x990D1F49C77889D5ULL, 0x172F5B3033043EBFULL, + 0x55DFBADB9AEE082CULL, 0x92CE98E760D05399ULL, 0xD03E790CC93A650AULL, + 0xAA478900B1228E31ULL, 0xE8B768EB18C8B8A2ULL, 0x2FA64AD7E2F6E317ULL, + 0x6D56AB3C4B1CD584ULL, 0xE374EF45BF6062EEULL, 0xA1840EAE168A547DULL, + 0x66952C92ECB40FC8ULL, 0x2465CD79455E395BULL, 0x3821458AADA7578FULL, + 0x7AD1A461044D611CULL, 0xBDC0865DFE733AA9ULL, 0xFF3067B657990C3AULL, + 0x711223CFA3E5BB50ULL, 0x33E2C2240A0F8DC3ULL, 0xF4F3E018F031D676ULL, + 0xB60301F359DBE0E5ULL, 0xDA050215EA6C212FULL, 0x98F5E3FE438617BCULL, + 0x5FE4C1C2B9B84C09ULL, 0x1D14202910527A9AULL, 0x93366450E42ECDF0ULL, + 0xD1C685BB4DC4FB63ULL, 0x16D7A787B7FAA0D6ULL, 0x5427466C1E109645ULL, + 0x4863CE9FF6E9F891ULL, 0x0A932F745F03CE02ULL, 0xCD820D48A53D95B7ULL, + 0x8F72ECA30CD7A324ULL, 0x0150A8DAF8AB144EULL, 0x43A04931514122DDULL, + 0x84B16B0DAB7F7968ULL, 0xC6418AE602954FFBULL, 0xBC387AEA7A8DA4C0ULL, + 0xFEC89B01D3679253ULL, 0x39D9B93D2959C9E6ULL, 0x7B2958D680B3FF75ULL, + 0xF50B1CAF74CF481FULL, 0xB7FBFD44DD257E8CULL, 0x70EADF78271B2539ULL, + 0x321A3E938EF113AAULL, 0x2E5EB66066087D7EULL, 0x6CAE578BCFE24BEDULL, + 0xABBF75B735DC1058ULL, 0xE94F945C9C3626CBULL, 0x676DD025684A91A1ULL, + 0x259D31CEC1A0A732ULL, 0xE28C13F23B9EFC87ULL, 0xA07CF2199274CA14ULL, + 0x167FF3EACBAF2AF1ULL, 0x548F120162451C62ULL, 0x939E303D987B47D7ULL, + 0xD16ED1D631917144ULL, 0x5F4C95AFC5EDC62EULL, 0x1DBC74446C07F0BDULL, + 0xDAAD56789639AB08ULL, 0x985DB7933FD39D9BULL, 0x84193F60D72AF34FULL, + 0xC6E9DE8B7EC0C5DCULL, 0x01F8FCB784FE9E69ULL, 0x43081D5C2D14A8FAULL, + 0xCD2A5925D9681F90ULL, 0x8FDAB8CE70822903ULL, 0x48CB9AF28ABC72B6ULL, + 0x0A3B7B1923564425ULL, 0x70428B155B4EAF1EULL, 0x32B26AFEF2A4998DULL, + 0xF5A348C2089AC238ULL, 0xB753A929A170F4ABULL, 0x3971ED50550C43C1ULL, + 0x7B810CBBFCE67552ULL, 0xBC902E8706D82EE7ULL, 0xFE60CF6CAF321874ULL, + 0xE224479F47CB76A0ULL, 0xA0D4A674EE214033ULL, 0x67C58448141F1B86ULL, + 0x253565A3BDF52D15ULL, 0xAB1721DA49899A7FULL, 0xE9E7C031E063ACECULL, + 0x2EF6E20D1A5DF759ULL, 0x6C0603E6B3B7C1CAULL, 0xF6FAE5C07D3274CDULL, + 0xB40A042BD4D8425EULL, 0x731B26172EE619EBULL, 0x31EBC7FC870C2F78ULL, + 0xBFC9838573709812ULL, 0xFD39626EDA9AAE81ULL, 0x3A28405220A4F534ULL, + 0x78D8A1B9894EC3A7ULL, 0x649C294A61B7AD73ULL, 0x266CC8A1C85D9BE0ULL, + 0xE17DEA9D3263C055ULL, 0xA38D0B769B89F6C6ULL, 0x2DAF4F0F6FF541ACULL, + 0x6F5FAEE4C61F773FULL, 0xA84E8CD83C212C8AULL, 0xEABE6D3395CB1A19ULL, + 0x90C79D3FEDD3F122ULL, 0xD2377CD44439C7B1ULL, 0x15265EE8BE079C04ULL, + 0x57D6BF0317EDAA97ULL, 0xD9F4FB7AE3911DFDULL, 0x9B041A914A7B2B6EULL, + 0x5C1538ADB04570DBULL, 0x1EE5D94619AF4648ULL, 0x02A151B5F156289CULL, + 0x4051B05E58BC1E0FULL, 0x87409262A28245BAULL, 0xC5B073890B687329ULL, + 0x4B9237F0FF14C443ULL, 0x0962D61B56FEF2D0ULL, 0xCE73F427ACC0A965ULL, + 0x8C8315CC052A9FF6ULL, 0x3A80143F5CF17F13ULL, 0x7870F5D4F51B4980ULL, + 0xBF61D7E80F251235ULL, 0xFD913603A6CF24A6ULL, 0x73B3727A52B393CCULL, + 0x31439391FB59A55FULL, 0xF652B1AD0167FEEAULL, 0xB4A25046A88DC879ULL, + 0xA8E6D8B54074A6ADULL, 0xEA16395EE99E903EULL, 0x2D071B6213A0CB8BULL, + 0x6FF7FA89BA4AFD18ULL, 0xE1D5BEF04E364A72ULL, 0xA3255F1BE7DC7CE1ULL, + 0x64347D271DE22754ULL, 0x26C49CCCB40811C7ULL, 0x5CBD6CC0CC10FAFCULL, + 0x1E4D8D2B65FACC6FULL, 0xD95CAF179FC497DAULL, 0x9BAC4EFC362EA149ULL, + 0x158E0A85C2521623ULL, 0x577EEB6E6BB820B0ULL, 0x906FC95291867B05ULL, + 0xD29F28B9386C4D96ULL, 0xCEDBA04AD0952342ULL, 0x8C2B41A1797F15D1ULL, + 0x4B3A639D83414E64ULL, 0x09CA82762AAB78F7ULL, 0x87E8C60FDED7CF9DULL, + 0xC51827E4773DF90EULL, 0x020905D88D03A2BBULL, 0x40F9E43324E99428ULL, + 0x2CFFE7D5975E55E2ULL, 0x6E0F063E3EB46371ULL, 0xA91E2402C48A38C4ULL, + 0xEBEEC5E96D600E57ULL, 0x65CC8190991CB93DULL, 0x273C607B30F68FAEULL, + 0xE02D4247CAC8D41BULL, 0xA2DDA3AC6322E288ULL, 0xBE992B5F8BDB8C5CULL, + 0xFC69CAB42231BACFULL, 0x3B78E888D80FE17AULL, 0x7988096371E5D7E9ULL, + 0xF7AA4D1A85996083ULL, 0xB55AACF12C735610ULL, 0x724B8ECDD64D0DA5ULL, + 0x30BB6F267FA73B36ULL, 0x4AC29F2A07BFD00DULL, 0x08327EC1AE55E69EULL, + 0xCF235CFD546BBD2BULL, 0x8DD3BD16FD818BB8ULL, 0x03F1F96F09FD3CD2ULL, + 0x41011884A0170A41ULL, 0x86103AB85A2951F4ULL, 0xC4E0DB53F3C36767ULL, + 0xD8A453A01B3A09B3ULL, 0x9A54B24BB2D03F20ULL, 0x5D45907748EE6495ULL, + 0x1FB5719CE1045206ULL, 0x919735E51578E56CULL, 0xD367D40EBC92D3FFULL, + 0x1476F63246AC884AULL, 0x568617D9EF46BED9ULL, 0xE085162AB69D5E3CULL, + 0xA275F7C11F7768AFULL, 0x6564D5FDE549331AULL, 0x279434164CA30589ULL, + 0xA9B6706FB8DFB2E3ULL, 0xEB46918411358470ULL, 0x2C57B3B8EB0BDFC5ULL, + 0x6EA7525342E1E956ULL, 0x72E3DAA0AA188782ULL, 0x30133B4B03F2B111ULL, + 0xF7021977F9CCEAA4ULL, 0xB5F2F89C5026DC37ULL, 0x3BD0BCE5A45A6B5DULL, + 0x79205D0E0DB05DCEULL, 0xBE317F32F78E067BULL, 0xFCC19ED95E6430E8ULL, + 0x86B86ED5267CDBD3ULL, 0xC4488F3E8F96ED40ULL, 0x0359AD0275A8B6F5ULL, + 0x41A94CE9DC428066ULL, 0xCF8B0890283E370CULL, 0x8D7BE97B81D4019FULL, + 0x4A6ACB477BEA5A2AULL, 0x089A2AACD2006CB9ULL, 0x14DEA25F3AF9026DULL, + 0x562E43B4931334FEULL, 0x913F6188692D6F4BULL, 0xD3CF8063C0C759D8ULL, + 0x5DEDC41A34BBEEB2ULL, 0x1F1D25F19D51D821ULL, 0xD80C07CD676F8394ULL, + 0x9AFCE626CE85B507ULL +}; + +/* + * This a generic crc64() function, it takes seed as an argument, + * and does __not__ xor at the end. Then individual users can do + * whatever they need. + */ +uint64_t crc64(uint64_t seed, const unsigned char *data, size_t len) +{ + uint64_t crc = seed; + + while (len) { + int i = ((int) (crc >> 56) ^ *data++) & 0xFF; + crc = crc64_tab[i] ^ (crc << 8); + len--; + } + + return crc; +} + diff --git a/libblkid/lib/env.c b/libblkid/lib/env.c new file mode 100644 index 000000000..c79e0e0de --- /dev/null +++ b/libblkid/lib/env.c @@ -0,0 +1,110 @@ +/* + * Security checks of environment + * Added from shadow-utils package + * by Arkadiusz MiÅ›kiewicz <misiek@pld.ORG.PL> + * + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#ifdef HAVE_SYS_PRCTL_H +#include <sys/prctl.h> +#else +#define PR_GET_DUMPABLE 3 +#endif +#if (!defined(HAVE_PRCTL) && defined(linux)) +#include <sys/syscall.h> +#endif +#include <unistd.h> +#include <sys/types.h> + +#include "env.h" + +#ifndef HAVE_ENVIRON_DECL +extern char **environ; +#endif + +static char * const forbid[] = { + "_RLD_=", + "BASH_ENV=", /* GNU creeping featurism strikes again... */ + "ENV=", + "HOME=", + "IFS=", + "KRB_CONF=", + "LD_", /* anything with the LD_ prefix */ + "LIBPATH=", + "MAIL=", + "NLSPATH=", + "PATH=", + "SHELL=", + "SHLIB_PATH=", + (char *) 0 +}; + +/* these are allowed, but with no slashes inside + (to work around security problems in GNU gettext) */ +static char * const noslash[] = { + "LANG=", + "LANGUAGE=", + "LC_", /* anything with the LC_ prefix */ + (char *) 0 +}; + +void +sanitize_env(void) +{ + char **envp = environ; + char * const *bad; + char **cur; + char **move; + + for (cur = envp; *cur; cur++) { + for (bad = forbid; *bad; bad++) { + if (strncmp(*cur, *bad, strlen(*bad)) == 0) { + for (move = cur; *move; move++) + *move = *(move + 1); + cur--; + break; + } + } + } + + for (cur = envp; *cur; cur++) { + for (bad = noslash; *bad; bad++) { + if (strncmp(*cur, *bad, strlen(*bad)) != 0) + continue; + if (!strchr(*cur, '/')) + continue; /* OK */ + for (move = cur; *move; move++) + *move = *(move + 1); + cur--; + break; + } + } +} + + +char *safe_getenv(const char *arg) +{ + uid_t ruid = getuid(); + + if (ruid != 0 || (ruid != geteuid()) || (getgid() != getegid())) + return NULL; +#ifdef HAVE_PRCTL + if (prctl(PR_GET_DUMPABLE, 0, 0, 0, 0) == 0) + return NULL; +#else +#if (defined(linux) && defined(SYS_prctl)) + if (syscall(SYS_prctl, PR_GET_DUMPABLE, 0, 0, 0, 0) == 0) + return NULL; +#endif +#endif +#ifdef HAVE_SECURE_GETENV +return secure_getenv(arg); +#elif HAVE___SECURE_GETENV + return __secure_getenv(arg); +#else + return getenv(arg); +#endif +} diff --git a/libblkid/lib/exec_shell.c b/libblkid/lib/exec_shell.c new file mode 100644 index 000000000..2b263644d --- /dev/null +++ b/libblkid/lib/exec_shell.c @@ -0,0 +1,46 @@ +/* + * exec_shell() - launch a shell, else exit! + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/types.h> + +#include "nls.h" +#include "c.h" +#include "xalloc.h" + +#include "exec_shell.h" + +#define DEFAULT_SHELL "/bin/sh" + +void exec_shell(void) +{ + const char *shell = getenv("SHELL"), *shell_basename; + char *arg0; + if (!shell) + shell = DEFAULT_SHELL; + + shell_basename = basename(shell); + arg0 = xmalloc(strlen(shell_basename) + 2); + arg0[0] = '-'; + strcpy(arg0 + 1, shell_basename); + + execl(shell, arg0, NULL); + err(EXIT_FAILURE, _("failed to execute %s"), shell); +} diff --git a/libblkid/lib/fileutils.c b/libblkid/lib/fileutils.c new file mode 100644 index 000000000..4e884d39a --- /dev/null +++ b/libblkid/lib/fileutils.c @@ -0,0 +1,135 @@ +/* + * Copyright (C) 2012 Sami Kerola <kerolasa@iki.fi> + */ + +#include <stdio.h> +#include <stdlib.h> +#include <paths.h> +#include <sys/stat.h> +#include <unistd.h> +#include <sys/time.h> +#include <sys/resource.h> + +#include "c.h" +#include "fileutils.h" +#include "pathnames.h" + +/* Create open temporary file in safe way. Please notice that the + * file permissions are -rw------- by default. */ +int xmkstemp(char **tmpname, char *dir) +{ + char *localtmp; + char *tmpenv; + mode_t old_mode; + int fd, rc; + + /* Some use cases must be capable of being moved atomically + * with rename(2), which is the reason why dir is here. */ + if (dir != NULL) + tmpenv = dir; + else + tmpenv = getenv("TMPDIR"); + + if (tmpenv) + rc = asprintf(&localtmp, "%s/%s.XXXXXX", tmpenv, + program_invocation_short_name); + else + rc = asprintf(&localtmp, "%s/%s.XXXXXX", _PATH_TMP, + program_invocation_short_name); + + if (rc < 0) + return -1; + + old_mode = umask(077); + fd = mkstemp(localtmp); + umask(old_mode); + if (fd == -1) { + free(localtmp); + localtmp = NULL; + } + *tmpname = localtmp; + return fd; +} + +/* + * portable getdtablesize() + */ +int get_fd_tabsize(void) +{ + int m; + +#if defined(HAVE_GETDTABLESIZE) + m = getdtablesize(); +#elif defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE) + struct rlimit rl; + + getrlimit(RLIMIT_NOFILE, &rl); + m = rl.rlim_cur; +#elif defined(HAVE_SYSCONF) && defined(_SC_OPEN_MAX) + m = sysconf(_SC_OPEN_MAX); +#else + m = OPEN_MAX; +#endif + return m; +} + +#ifdef TEST_PROGRAM +int main(void) +{ + FILE *f; + char *tmpname; + f = xfmkstemp(&tmpname, NULL); + unlink(tmpname); + free(tmpname); + fclose(f); + return EXIT_FAILURE; +} +#endif + + +int mkdir_p(const char *path, mode_t mode) +{ + char *p, *dir; + int rc = 0; + + if (!path || !*path) + return -EINVAL; + + dir = p = strdup(path); + if (!dir) + return -ENOMEM; + + if (*p == '/') + p++; + + while (p && *p) { + char *e = strchr(p, '/'); + if (e) + *e = '\0'; + if (*p) { + rc = mkdir(dir, mode); + if (rc && errno != EEXIST) + break; + rc = 0; + } + if (!e) + break; + *e = '/'; + p = e + 1; + } + + free(dir); + return rc; +} + +/* returns basename and keeps dirname in the @path, if @path is "/" (root) + * then returns empty string */ +char *stripoff_last_component(char *path) +{ + char *p = path ? strrchr(path, '/') : NULL; + + if (!p) + return NULL; + *p = '\0'; + return p + 1; +} diff --git a/libblkid/lib/ismounted.c b/libblkid/lib/ismounted.c new file mode 100644 index 000000000..8099bd7d5 --- /dev/null +++ b/libblkid/lib/ismounted.c @@ -0,0 +1,388 @@ +/* + * ismounted.c --- Check to see if the filesystem was mounted + * + * Copyright (C) 1995,1996,1997,1998,1999,2000,2008 Theodore Ts'o. + * + * This file may be redistributed under the terms of the GNU Public + * License. + */ +#include <stdio.h> +#include <unistd.h> +#include <stdlib.h> +#include <errno.h> +#include <fcntl.h> +#ifdef HAVE_MNTENT_H +#include <mntent.h> +#endif +#include <string.h> +#include <sys/stat.h> +#include <ctype.h> +#include <sys/param.h> +#ifdef __APPLE__ +#include <sys/ucred.h> +#include <sys/mount.h> +#endif + +#include "pathnames.h" +#include "ismounted.h" +#include "c.h" +#ifdef __linux__ +# include "loopdev.h" +#endif + + + +#ifdef HAVE_MNTENT_H +/* + * Helper function which checks a file in /etc/mtab format to see if a + * filesystem is mounted. Returns an error if the file doesn't exist + * or can't be opened. + */ +static int check_mntent_file(const char *mtab_file, const char *file, + int *mount_flags, char *mtpt, int mtlen) +{ + struct mntent *mnt; + struct stat st_buf; + int retval = 0; + dev_t file_dev=0, file_rdev=0; + ino_t file_ino=0; + FILE *f; + int fd; + + *mount_flags = 0; + if ((f = setmntent (mtab_file, "r")) == NULL) + return errno; + + if (stat(file, &st_buf) == 0) { + if (S_ISBLK(st_buf.st_mode)) { +#ifndef __GNU__ /* The GNU hurd is broken with respect to stat devices */ + file_rdev = st_buf.st_rdev; +#endif /* __GNU__ */ + } else { + file_dev = st_buf.st_dev; + file_ino = st_buf.st_ino; + } + } + + while ((mnt = getmntent (f)) != NULL) { + if (mnt->mnt_fsname[0] != '/') + continue; + if (strcmp(file, mnt->mnt_fsname) == 0) + break; + if (stat(mnt->mnt_fsname, &st_buf) != 0) + continue; + + if (S_ISBLK(st_buf.st_mode)) { +#ifndef __GNU__ + if (file_rdev && file_rdev == st_buf.st_rdev) + break; +#ifdef __linux__ + /* maybe the file is loopdev backing file */ + if (file_dev + && major(st_buf.st_rdev) == LOOPDEV_MAJOR + && loopdev_is_used(mnt->mnt_fsname, file, 0, 0)) + break; +#endif /* __linux__ */ +#endif /* __GNU__ */ + } else { + if (file_dev && ((file_dev == st_buf.st_dev) && + (file_ino == st_buf.st_ino))) + break; + } + } + + if (mnt == NULL) { +#ifndef __GNU__ /* The GNU hurd is broken with respect to stat devices */ + /* + * Do an extra check to see if this is the root device. We + * can't trust /etc/mtab, and /proc/mounts will only list + * /dev/root for the root filesystem. Argh. Instead we + * check if the given device has the same major/minor number + * as the device that the root directory is on. + */ + if (file_rdev && stat("/", &st_buf) == 0 && + st_buf.st_dev == file_rdev) { + *mount_flags = MF_MOUNTED; + if (mtpt) + strncpy(mtpt, "/", mtlen); + goto is_root; + } +#endif /* __GNU__ */ + goto errout; + } +#ifndef __GNU__ /* The GNU hurd is deficient; what else is new? */ + /* Validate the entry in case /etc/mtab is out of date */ + /* + * We need to be paranoid, because some broken distributions + * (read: Slackware) don't initialize /etc/mtab before checking + * all of the non-root filesystems on the disk. + */ + if (stat(mnt->mnt_dir, &st_buf) < 0) { + retval = errno; + if (retval == ENOENT) { +#ifdef DEBUG + printf("Bogus entry in %s! (%s does not exist)\n", + mtab_file, mnt->mnt_dir); +#endif /* DEBUG */ + retval = 0; + } + goto errout; + } + if (file_rdev && (st_buf.st_dev != file_rdev)) { +#ifdef DEBUG + printf("Bogus entry in %s! (%s not mounted on %s)\n", + mtab_file, file, mnt->mnt_dir); +#endif /* DEBUG */ + goto errout; + } +#endif /* __GNU__ */ + *mount_flags = MF_MOUNTED; + +#ifdef MNTOPT_RO + /* Check to see if the ro option is set */ + if (hasmntopt(mnt, MNTOPT_RO)) + *mount_flags |= MF_READONLY; +#endif + + if (mtpt) + strncpy(mtpt, mnt->mnt_dir, mtlen); + /* + * Check to see if we're referring to the root filesystem. + * If so, do a manual check to see if we can open /etc/mtab + * read/write, since if the root is mounted read/only, the + * contents of /etc/mtab may not be accurate. + */ + if (!strcmp(mnt->mnt_dir, "/")) { +is_root: +#define TEST_FILE "/.ismount-test-file" + *mount_flags |= MF_ISROOT; + fd = open(TEST_FILE, O_RDWR|O_CREAT|O_CLOEXEC, 0600); + if (fd < 0) { + if (errno == EROFS) + *mount_flags |= MF_READONLY; + } else + close(fd); + (void) unlink(TEST_FILE); + } + retval = 0; +errout: + endmntent (f); + return retval; +} + +static int check_mntent(const char *file, int *mount_flags, + char *mtpt, int mtlen) +{ + int retval; + +#ifdef DEBUG + retval = check_mntent_file("/tmp/mtab", file, mount_flags, + mtpt, mtlen); + if (retval == 0) + return 0; +#endif /* DEBUG */ +#ifdef __linux__ + retval = check_mntent_file("/proc/mounts", file, mount_flags, + mtpt, mtlen); + if (retval == 0 && (*mount_flags != 0)) + return 0; + if (access("/proc/mounts", R_OK) == 0) { + *mount_flags = 0; + return retval; + } +#endif /* __linux__ */ +#if defined(MOUNTED) || defined(_PATH_MOUNTED) +#ifndef MOUNTED +#define MOUNTED _PATH_MOUNTED +#endif /* MOUNTED */ + retval = check_mntent_file(MOUNTED, file, mount_flags, mtpt, mtlen); + return retval; +#else + *mount_flags = 0; + return 0; +#endif /* defined(MOUNTED) || defined(_PATH_MOUNTED) */ +} + +#else +#if defined(HAVE_GETMNTINFO) + +static int check_getmntinfo(const char *file, int *mount_flags, + char *mtpt, int mtlen) +{ + struct statfs *mp; + int len, n; + const char *s1; + char *s2; + + n = getmntinfo(&mp, MNT_NOWAIT); + if (n == 0) + return errno; + + len = sizeof(_PATH_DEV) - 1; + s1 = file; + if (strncmp(_PATH_DEV, s1, len) == 0) + s1 += len; + + *mount_flags = 0; + while (--n >= 0) { + s2 = mp->f_mntfromname; + if (strncmp(_PATH_DEV, s2, len) == 0) { + s2 += len - 1; + *s2 = 'r'; + } + if (strcmp(s1, s2) == 0 || strcmp(s1, &s2[1]) == 0) { + *mount_flags = MF_MOUNTED; + break; + } + ++mp; + } + if (mtpt) + strncpy(mtpt, mp->f_mntonname, mtlen); + return 0; +} +#endif /* HAVE_GETMNTINFO */ +#endif /* HAVE_MNTENT_H */ + +/* + * Check to see if we're dealing with the swap device. + */ +static int is_swap_device(const char *file) +{ + FILE *f; + char buf[1024], *cp; + dev_t file_dev; + struct stat st_buf; + int ret = 0; + + file_dev = 0; +#ifndef __GNU__ /* The GNU hurd is broken with respect to stat devices */ + if ((stat(file, &st_buf) == 0) && + S_ISBLK(st_buf.st_mode)) + file_dev = st_buf.st_rdev; +#endif /* __GNU__ */ + + if (!(f = fopen("/proc/swaps", "r"))) + return 0; + /* Skip the first line */ + if (!fgets(buf, sizeof(buf), f)) + goto leave; + if (*buf && strncmp(buf, "Filename\t", 9)) + /* Linux <=2.6.19 contained a bug in the /proc/swaps + * code where the header would not be displayed + */ + goto valid_first_line; + + while (fgets(buf, sizeof(buf), f)) { +valid_first_line: + if ((cp = strchr(buf, ' ')) != NULL) + *cp = 0; + if ((cp = strchr(buf, '\t')) != NULL) + *cp = 0; + if (strcmp(buf, file) == 0) { + ret++; + break; + } +#ifndef __GNU__ + if (file_dev && (stat(buf, &st_buf) == 0) && + S_ISBLK(st_buf.st_mode) && + file_dev == st_buf.st_rdev) { + ret++; + break; + } +#endif /* __GNU__ */ + } + +leave: + fclose(f); + return ret; +} + + +/* + * check_mount_point() fills determines if the device is mounted or otherwise + * busy, and fills in mount_flags with one or more of the following flags: + * MF_MOUNTED, MF_ISROOT, MF_READONLY, MF_SWAP, and MF_BUSY. If mtpt is + * non-NULL, the directory where the device is mounted is copied to where mtpt + * is pointing, up to mtlen characters. + */ +#ifdef __TURBOC__ + #pragma argsused +#endif +int check_mount_point(const char *device, int *mount_flags, + char *mtpt, int mtlen) +{ + struct stat st_buf; + int retval = 0; + int fd; + + if (is_swap_device(device)) { + *mount_flags = MF_MOUNTED | MF_SWAP; + if (mtpt && mtlen) + strncpy(mtpt, "[SWAP]", mtlen); + } else { +#ifdef HAVE_MNTENT_H + retval = check_mntent(device, mount_flags, mtpt, mtlen); +#else +#ifdef HAVE_GETMNTINFO + retval = check_getmntinfo(device, mount_flags, mtpt, mtlen); +#else +#ifdef __GNUC__ + #warning "Can't use getmntent or getmntinfo to check for mounted filesystems!" +#endif + *mount_flags = 0; +#endif /* HAVE_GETMNTINFO */ +#endif /* HAVE_MNTENT_H */ + } + if (retval) + return retval; + +#ifdef __linux__ /* This only works on Linux 2.6+ systems */ + if ((stat(device, &st_buf) != 0) || + !S_ISBLK(st_buf.st_mode)) + return 0; + fd = open(device, O_RDONLY|O_EXCL|O_CLOEXEC); + if (fd < 0) { + if (errno == EBUSY) + *mount_flags |= MF_BUSY; + } else + close(fd); +#endif + + return 0; +} + +int is_mounted(const char *file) +{ + int retval; + int mount_flags = 0; + + retval = check_mount_point(file, &mount_flags, NULL, 0); + if (retval) + return 0; + return mount_flags & MF_MOUNTED; +} + +#ifdef TEST_PROGRAM +int main(int argc, char **argv) +{ + int flags = 0; + char devname[PATH_MAX]; + + if (argc < 2) { + fprintf(stderr, "Usage: %s device\n", argv[0]); + return EXIT_FAILURE; + } + + if (check_mount_point(argv[1], &flags, devname, sizeof(devname)) == 0 && + (flags & MF_MOUNTED)) { + if (flags & MF_SWAP) + printf("used swap device\n"); + else + printf("mounted on %s\n", devname); + return EXIT_SUCCESS; + } + + printf("not mounted\n"); + return EXIT_FAILURE; +} +#endif /* DEBUG */ diff --git a/libblkid/lib/langinfo.c b/libblkid/lib/langinfo.c new file mode 100644 index 000000000..deeab9b11 --- /dev/null +++ b/libblkid/lib/langinfo.c @@ -0,0 +1,121 @@ +/* + * This is callback solution for systems without nl_langinfo(), this function + * returns hardcoded and on locale setting independed value. + * + * See langinfo.h man page for more details. + * + * Copyright (C) 2010 Karel Zak <kzak@redhat.com> + */ +#include "nls.h" + +char *langinfo_fallback(nl_item item) +{ + switch (item) { + case CODESET: + return "ISO-8859-1"; + case THOUSEP: + return ","; + case D_T_FMT: + case ERA_D_T_FMT: + return "%a %b %e %H:%M:%S %Y"; + case D_FMT: + case ERA_D_FMT: + return "%m/%d/%y"; + case T_FMT: + case ERA_T_FMT: + return "%H:%M:%S"; + case T_FMT_AMPM: + return "%I:%M:%S %p"; + case AM_STR: + return "AM"; + case PM_STR: + return "PM"; + case DAY_1: + return "Sunday"; + case DAY_2: + return "Monday"; + case DAY_3: + return "Tuesday"; + case DAY_4: + return "Wednesday"; + case DAY_5: + return "Thursday"; + case DAY_6: + return "Friday"; + case DAY_7: + return "Saturday"; + case ABDAY_1: + return "Sun"; + case ABDAY_2: + return "Mon"; + case ABDAY_3: + return "Tue"; + case ABDAY_4: + return "Wed"; + case ABDAY_5: + return "Thu"; + case ABDAY_6: + return "Fri"; + case ABDAY_7: + return "Sat"; + case MON_1: + return "January"; + case MON_2: + return "February"; + case MON_3: + return "March"; + case MON_4: + return "April"; + case MON_5: + return "May"; + case MON_6: + return "June"; + case MON_7: + return "July"; + case MON_8: + return "August"; + case MON_9: + return "September"; + case MON_10: + return "October"; + case MON_11: + return "November"; + case MON_12: + return "December"; + case ABMON_1: + return "Jan"; + case ABMON_2: + return "Feb"; + case ABMON_3: + return "Mar"; + case ABMON_4: + return "Apr"; + case ABMON_5: + return "May"; + case ABMON_6: + return "Jun"; + case ABMON_7: + return "Jul"; + case ABMON_8: + return "Aug"; + case ABMON_9: + return "Sep"; + case ABMON_10: + return "Oct"; + case ABMON_11: + return "Nov"; + case ABMON_12: + return "Dec"; + case ALT_DIGITS: + return "\0\0\0\0\0\0\0\0\0\0"; + case CRNCYSTR: + return "-"; + case YESEXPR: + return "^[yY]"; + case NOEXPR: + return "^[nN]"; + default: + return ""; + } +} + diff --git a/libblkid/lib/linux_version.c b/libblkid/lib/linux_version.c new file mode 100644 index 000000000..2bcc2cc65 --- /dev/null +++ b/libblkid/lib/linux_version.c @@ -0,0 +1,25 @@ +#include <stdio.h> +#include <sys/utsname.h> + +#include "linux_version.h" + +int get_linux_version (void) +{ + static int kver = -1; + struct utsname uts; + int major = 0; + int minor = 0; + int teeny = 0; + int n; + + if (kver != -1) + return kver; + if (uname (&uts)) + return kver = 0; + + n = sscanf(uts.release, "%d.%d.%d", &major, &minor, &teeny); + if (n < 1 || n > 3) + return kver = 0; + + return kver = KERNEL_VERSION(major, minor, teeny); +} diff --git a/libblkid/lib/loopdev.c b/libblkid/lib/loopdev.c new file mode 100644 index 000000000..09b9bbf75 --- /dev/null +++ b/libblkid/lib/loopdev.c @@ -0,0 +1,1572 @@ +/* + * No copyright is claimed. This code is in the public domain; do with + * it what you wish. + * + * Written by Karel Zak <kzak@redhat.com> + * + * -- based on mount/losetup.c + * + * Simple library for work with loop devices. + * + * - requires kernel 2.6.x + * - reads info from /sys/block/loop<N>/loop/<attr> (new kernels) + * - reads info by ioctl + * - supports *unlimited* number of loop devices + * - supports /dev/loop<N> as well as /dev/loop/<N> + * - minimize overhead (fd, loopinfo, ... are shared for all operations) + * - setup (associate device and backing file) + * - delete (dis-associate file) + * - old LOOP_{SET,GET}_STATUS (32bit) ioctls are unsupported + * - extendible + */ +#include <stdio.h> +#include <stdint.h> +#include <string.h> +#include <ctype.h> +#include <fcntl.h> +#include <stdlib.h> +#include <unistd.h> +#include <sys/ioctl.h> +#include <sys/stat.h> +#include <sys/mman.h> +#include <sys/sysmacros.h> +#include <inttypes.h> +#include <dirent.h> +#include <linux/posix_types.h> + +#include "linux_version.h" +#include "c.h" +#include "sysfs.h" +#include "pathnames.h" +#include "loopdev.h" +#include "canonicalize.h" +#include "at.h" +#include "blkdev.h" +#include "debug.h" + +/* + * Debug stuff (based on include/debug.h) + */ +UL_DEBUG_DEFINE_MASK(loopdev); +UL_DEBUG_DEFINE_MASKNAMES(loopdev) = UL_DEBUG_EMPTY_MASKNAMES; + +#define LOOPDEV_DEBUG_INIT (1 << 1) +#define LOOPDEV_DEBUG_CXT (1 << 2) +#define LOOPDEV_DEBUG_ITER (1 << 3) +#define LOOPDEV_DEBUG_SETUP (1 << 4) +#define SFDISKPROG_DEBUG_ALL 0xFFFF + +#define DBG(m, x) __UL_DBG(loopdev, LOOPDEV_DEBUG_, m, x) +#define ON_DBG(m, x) __UL_DBG_CALL(loopdev, LOOPDEV_DEBUG_, m, x) + +static void loopdev_init_debug(void) +{ + if (loopdev_debug_mask) + return; + __UL_INIT_DEBUG(loopdev, LOOPDEV_DEBUG_, 0, LOOPDEV_DEBUG); +} + +/* + * see loopcxt_init() + */ +#define loopcxt_ioctl_enabled(_lc) (!((_lc)->flags & LOOPDEV_FL_NOIOCTL)) +#define loopcxt_sysfs_available(_lc) (!((_lc)->flags & LOOPDEV_FL_NOSYSFS)) \ + && !loopcxt_ioctl_enabled(_lc) + +/* + * @lc: context + * @device: device name, absolute device path or NULL to reset the current setting + * + * Sets device, absolute paths (e.g. "/dev/loop<N>") are unchanged, device + * names ("loop<N>") are converted to the path (/dev/loop<N> or to + * /dev/loop/<N>) + * + * This sets the device name, but does not check if the device exists! + * + * Returns: <0 on error, 0 on success + */ +int loopcxt_set_device(struct loopdev_cxt *lc, const char *device) +{ + if (!lc) + return -EINVAL; + + if (lc->fd >= 0) { + close(lc->fd); + DBG(CXT, ul_debugobj(lc, "closing old open fd")); + } + lc->fd = -1; + lc->mode = 0; + lc->has_info = 0; + lc->info_failed = 0; + *lc->device = '\0'; + memset(&lc->info, 0, sizeof(lc->info)); + + /* set new */ + if (device) { + if (*device != '/') { + const char *dir = _PATH_DEV; + + /* compose device name for /dev/loop<n> or /dev/loop/<n> */ + if (lc->flags & LOOPDEV_FL_DEVSUBDIR) { + if (strlen(device) < 5) + return -1; + device += 4; + dir = _PATH_DEV_LOOP "/"; /* _PATH_DEV uses tailing slash */ + } + snprintf(lc->device, sizeof(lc->device), "%s%s", + dir, device); + } else { + strncpy(lc->device, device, sizeof(lc->device)); + lc->device[sizeof(lc->device) - 1] = '\0'; + } + DBG(CXT, ul_debugobj(lc, "%s name assigned", device)); + } + + sysfs_deinit(&lc->sysfs); + return 0; +} + +int loopcxt_has_device(struct loopdev_cxt *lc) +{ + return lc && *lc->device; +} + +/* + * @lc: context + * @flags: LOOPDEV_FL_* flags + * + * Initilize loop handler. + * + * We have two sets of the flags: + * + * * LOOPDEV_FL_* flags control loopcxt_* API behavior + * + * * LO_FLAGS_* are kernel flags used for LOOP_{SET,GET}_STAT64 ioctls + * + * Note about LOOPDEV_FL_{RDONLY,RDWR} flags. These flags are used for open(2) + * syscall to open loop device. By default is the device open read-only. + * + * The expection is loopcxt_setup_device(), where the device is open read-write + * if LO_FLAGS_READ_ONLY flags is not set (see loopcxt_set_flags()). + * + * Returns: <0 on error, 0 on success. + */ +int loopcxt_init(struct loopdev_cxt *lc, int flags) +{ + int rc; + struct stat st; + struct loopdev_cxt dummy = UL_LOOPDEVCXT_EMPTY; + + if (!lc) + return -EINVAL; + + loopdev_init_debug(); + DBG(CXT, ul_debugobj(lc, "initialize context")); + + memcpy(lc, &dummy, sizeof(dummy)); + lc->flags = flags; + + rc = loopcxt_set_device(lc, NULL); + if (rc) + return rc; + + if (stat(_PATH_SYS_BLOCK, &st) || !S_ISDIR(st.st_mode)) { + lc->flags |= LOOPDEV_FL_NOSYSFS; + lc->flags &= ~LOOPDEV_FL_NOIOCTL; + DBG(CXT, ul_debugobj(lc, "init: disable /sys usage")); + } + + if (!(lc->flags & LOOPDEV_FL_NOSYSFS) && + get_linux_version() >= KERNEL_VERSION(2,6,37)) { + /* + * Use only sysfs for basic information about loop devices + */ + lc->flags |= LOOPDEV_FL_NOIOCTL; + DBG(CXT, ul_debugobj(lc, "init: ignore ioctls")); + } + + if (!(lc->flags & LOOPDEV_FL_CONTROL) && !stat(_PATH_DEV_LOOPCTL, &st)) { + lc->flags |= LOOPDEV_FL_CONTROL; + DBG(CXT, ul_debugobj(lc, "init: loop-control detected ")); + } + + return 0; +} + +/* + * @lc: context + * + * Deinitialize loop context + */ +void loopcxt_deinit(struct loopdev_cxt *lc) +{ + int errsv = errno; + + if (!lc) + return; + + DBG(CXT, ul_debugobj(lc, "de-initialize")); + + free(lc->filename); + lc->filename = NULL; + + ignore_result( loopcxt_set_device(lc, NULL) ); + loopcxt_deinit_iterator(lc); + + errno = errsv; +} + +/* + * @lc: context + * + * Returns newly allocated device path. + */ +char *loopcxt_strdup_device(struct loopdev_cxt *lc) +{ + if (!lc || !*lc->device) + return NULL; + return strdup(lc->device); +} + +/* + * @lc: context + * + * Returns pointer device name in the @lc struct. + */ +const char *loopcxt_get_device(struct loopdev_cxt *lc) +{ + return lc && *lc->device ? lc->device : NULL; +} + +/* + * @lc: context + * + * Returns pointer to the sysfs context (see lib/sysfs.c) + */ +struct sysfs_cxt *loopcxt_get_sysfs(struct loopdev_cxt *lc) +{ + if (!lc || !*lc->device || (lc->flags & LOOPDEV_FL_NOSYSFS)) + return NULL; + + if (!lc->sysfs.devno) { + dev_t devno = sysfs_devname_to_devno(lc->device, NULL); + if (!devno) { + DBG(CXT, ul_debugobj(lc, "sysfs: failed devname to devno")); + return NULL; + } + if (sysfs_init(&lc->sysfs, devno, NULL)) { + DBG(CXT, ul_debugobj(lc, "sysfs: init failed")); + return NULL; + } + } + + return &lc->sysfs; +} + +/* + * @lc: context + * + * Returns: file descriptor to the open loop device or <0 on error. The mode + * depends on LOOPDEV_FL_{RDWR,RDONLY} context flags. Default is + * read-only. + */ +int loopcxt_get_fd(struct loopdev_cxt *lc) +{ + if (!lc || !*lc->device) + return -EINVAL; + + if (lc->fd < 0) { + lc->mode = lc->flags & LOOPDEV_FL_RDWR ? O_RDWR : O_RDONLY; + lc->fd = open(lc->device, lc->mode | O_CLOEXEC); + DBG(CXT, ul_debugobj(lc, "open %s [%s]: %m", lc->device, + lc->flags & LOOPDEV_FL_RDWR ? "rw" : "ro")); + } + return lc->fd; +} + +int loopcxt_set_fd(struct loopdev_cxt *lc, int fd, int mode) +{ + if (!lc) + return -EINVAL; + + lc->fd = fd; + lc->mode = mode; + return 0; +} + +/* + * @lc: context + * @flags: LOOPITER_FL_* flags + * + * Iterator allows to scan list of the free or used loop devices. + * + * Returns: <0 on error, 0 on success + */ +int loopcxt_init_iterator(struct loopdev_cxt *lc, int flags) +{ + struct loopdev_iter *iter; + struct stat st; + + if (!lc) + return -EINVAL; + + + iter = &lc->iter; + DBG(ITER, ul_debugobj(iter, "initialize")); + + /* always zeroize + */ + memset(iter, 0, sizeof(*iter)); + iter->ncur = -1; + iter->flags = flags; + iter->default_check = 1; + + if (!lc->extra_check) { + /* + * Check for /dev/loop/<N> subdirectory + */ + if (!(lc->flags & LOOPDEV_FL_DEVSUBDIR) && + stat(_PATH_DEV_LOOP, &st) == 0 && S_ISDIR(st.st_mode)) + lc->flags |= LOOPDEV_FL_DEVSUBDIR; + + lc->extra_check = 1; + } + return 0; +} + +/* + * @lc: context + * + * Returns: <0 on error, 0 on success + */ +int loopcxt_deinit_iterator(struct loopdev_cxt *lc) +{ + struct loopdev_iter *iter; + + if (!lc) + return -EINVAL; + + iter = &lc->iter; + DBG(ITER, ul_debugobj(iter, "de-initialize")); + + free(iter->minors); + if (iter->proc) + fclose(iter->proc); + if (iter->sysblock) + closedir(iter->sysblock); + iter->minors = NULL; + iter->proc = NULL; + iter->sysblock = NULL; + iter->done = 1; + return 0; +} + +/* + * Same as loopcxt_set_device, but also checks if the device is + * associeted with any file. + * + * Returns: <0 on error, 0 on success, 1 device does not match with + * LOOPITER_FL_{USED,FREE} flags. + */ +static int loopiter_set_device(struct loopdev_cxt *lc, const char *device) +{ + int rc = loopcxt_set_device(lc, device); + int used; + + if (rc) + return rc; + + if (!(lc->iter.flags & LOOPITER_FL_USED) && + !(lc->iter.flags & LOOPITER_FL_FREE)) + return 0; /* caller does not care about device status */ + + if (!is_loopdev(lc->device)) { + DBG(ITER, ul_debugobj(&lc->iter, "%s does not exist", lc->device)); + return -errno; + } + + DBG(ITER, ul_debugobj(&lc->iter, "%s exist", lc->device)); + + used = loopcxt_get_offset(lc, NULL) == 0; + + if ((lc->iter.flags & LOOPITER_FL_USED) && used) + return 0; + + if ((lc->iter.flags & LOOPITER_FL_FREE) && !used) + return 0; + + DBG(ITER, ul_debugobj(&lc->iter, "failed to use %s device", lc->device)); + + ignore_result( loopcxt_set_device(lc, NULL) ); + return 1; +} + +static int cmpnum(const void *p1, const void *p2) +{ + return (((* (int *) p1) > (* (int *) p2)) - + ((* (int *) p1) < (* (int *) p2))); +} + +/* + * The classic scandir() is more expensive and less portable. + * We needn't full loop device names -- loop numbers (loop<N>) + * are enough. + */ +static int loop_scandir(const char *dirname, int **ary, int hasprefix) +{ + DIR *dir; + struct dirent *d; + unsigned int n, count = 0, arylen = 0; + + if (!dirname || !ary) + return 0; + + DBG(ITER, ul_debug("scan dir: %s", dirname)); + + dir = opendir(dirname); + if (!dir) + return 0; + free(*ary); + *ary = NULL; + + while((d = readdir(dir))) { +#ifdef _DIRENT_HAVE_D_TYPE + if (d->d_type != DT_BLK && d->d_type != DT_UNKNOWN && + d->d_type != DT_LNK) + continue; +#endif + if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, "..")) + continue; + + if (hasprefix) { + /* /dev/loop<N> */ + if (sscanf(d->d_name, "loop%u", &n) != 1) + continue; + } else { + /* /dev/loop/<N> */ + char *end = NULL; + + errno = 0; + n = strtol(d->d_name, &end, 10); + if (d->d_name == end || (end && *end) || errno) + continue; + } + if (n < LOOPDEV_DEFAULT_NNODES) + continue; /* ignore loop<0..7> */ + + if (count + 1 > arylen) { + int *tmp; + + arylen += 1; + + tmp = realloc(*ary, arylen * sizeof(int)); + if (!tmp) { + free(*ary); + closedir(dir); + return -1; + } + *ary = tmp; + } + if (*ary) + (*ary)[count++] = n; + } + if (count && *ary) + qsort(*ary, count, sizeof(int), cmpnum); + + closedir(dir); + return count; +} + +/* + * Set the next *used* loop device according to /proc/partitions. + * + * Loop devices smaller than 512 bytes are invisible for this function. + */ +static int loopcxt_next_from_proc(struct loopdev_cxt *lc) +{ + struct loopdev_iter *iter = &lc->iter; + char buf[BUFSIZ]; + + DBG(ITER, ul_debugobj(iter, "scan /proc/partitions")); + + if (!iter->proc) + iter->proc = fopen(_PATH_PROC_PARTITIONS, "r"); + if (!iter->proc) + return 1; + + while (fgets(buf, sizeof(buf), iter->proc)) { + unsigned int m; + char name[128 + 1]; + + + if (sscanf(buf, " %u %*s %*s %128[^\n ]", + &m, name) != 2 || m != LOOPDEV_MAJOR) + continue; + + DBG(ITER, ul_debugobj(iter, "checking %s", name)); + + if (loopiter_set_device(lc, name) == 0) + return 0; + } + + return 1; +} + +/* + * Set the next *used* loop device according to + * /sys/block/loopN/loop/backing_file (kernel >= 2.6.37 is required). + * + * This is preferred method. + */ +static int loopcxt_next_from_sysfs(struct loopdev_cxt *lc) +{ + struct loopdev_iter *iter = &lc->iter; + struct dirent *d; + int fd; + + DBG(ITER, ul_debugobj(iter, "scanning /sys/block")); + + if (!iter->sysblock) + iter->sysblock = opendir(_PATH_SYS_BLOCK); + + if (!iter->sysblock) + return 1; + + fd = dirfd(iter->sysblock); + + while ((d = readdir(iter->sysblock))) { + char name[256]; + struct stat st; + + DBG(ITER, ul_debugobj(iter, "check %s", d->d_name)); + + if (strcmp(d->d_name, ".") == 0 + || strcmp(d->d_name, "..") == 0 + || strncmp(d->d_name, "loop", 4) != 0) + continue; + + snprintf(name, sizeof(name), "%s/loop/backing_file", d->d_name); + if (fstat_at(fd, _PATH_SYS_BLOCK, name, &st, 0) != 0) + continue; + + if (loopiter_set_device(lc, d->d_name) == 0) + return 0; + } + + return 1; +} + +/* + * @lc: context, has to initialized by loopcxt_init_iterator() + * + * Returns: 0 on success, -1 on error, 1 at the end of scanning. The details + * about the current loop device are available by + * loopcxt_get_{fd,backing_file,device,offset, ...} functions. + */ +int loopcxt_next(struct loopdev_cxt *lc) +{ + struct loopdev_iter *iter; + + if (!lc) + return -EINVAL; + + + iter = &lc->iter; + if (iter->done) + return 1; + + DBG(ITER, ul_debugobj(iter, "next")); + + /* A) Look for used loop devices in /proc/partitions ("losetup -a" only) + */ + if (iter->flags & LOOPITER_FL_USED) { + int rc; + + if (loopcxt_sysfs_available(lc)) + rc = loopcxt_next_from_sysfs(lc); + else + rc = loopcxt_next_from_proc(lc); + if (rc == 0) + return 0; + goto done; + } + + /* B) Classic way, try first eight loop devices (default number + * of loop devices). This is enough for 99% of all cases. + */ + if (iter->default_check) { + DBG(ITER, ul_debugobj(iter, "next: default check")); + for (++iter->ncur; iter->ncur < LOOPDEV_DEFAULT_NNODES; + iter->ncur++) { + char name[16]; + snprintf(name, sizeof(name), "loop%d", iter->ncur); + + if (loopiter_set_device(lc, name) == 0) + return 0; + } + iter->default_check = 0; + } + + /* C) the worst possibility, scan whole /dev or /dev/loop/<N> + */ + if (!iter->minors) { + DBG(ITER, ul_debugobj(iter, "next: scanning /dev")); + iter->nminors = (lc->flags & LOOPDEV_FL_DEVSUBDIR) ? + loop_scandir(_PATH_DEV_LOOP, &iter->minors, 0) : + loop_scandir(_PATH_DEV, &iter->minors, 1); + iter->ncur = -1; + } + for (++iter->ncur; iter->ncur < iter->nminors; iter->ncur++) { + char name[16]; + snprintf(name, sizeof(name), "loop%d", iter->minors[iter->ncur]); + + if (loopiter_set_device(lc, name) == 0) + return 0; + } +done: + loopcxt_deinit_iterator(lc); + return 1; +} + +/* + * @device: path to device + */ +int is_loopdev(const char *device) +{ + struct stat st; + + if (!device) + return 0; + + return (stat(device, &st) == 0 && + S_ISBLK(st.st_mode) && + major(st.st_rdev) == LOOPDEV_MAJOR); +} + +/* + * @lc: context + * + * Returns result from LOOP_GET_STAT64 ioctl or NULL on error. + */ +struct loop_info64 *loopcxt_get_info(struct loopdev_cxt *lc) +{ + int fd; + + if (!lc || lc->info_failed) { + errno = EINVAL; + return NULL; + } + errno = 0; + if (lc->has_info) + return &lc->info; + + fd = loopcxt_get_fd(lc); + if (fd < 0) + return NULL; + + if (ioctl(fd, LOOP_GET_STATUS64, &lc->info) == 0) { + lc->has_info = 1; + lc->info_failed = 0; + DBG(CXT, ul_debugobj(lc, "reading loop_info64 OK")); + return &lc->info; + } + + lc->info_failed = 1; + DBG(CXT, ul_debugobj(lc, "reading loop_info64 FAILED")); + + return NULL; +} + +/* + * @lc: context + * + * Returns (allocated) string with path to the file assicieted + * with the current loop device. + */ +char *loopcxt_get_backing_file(struct loopdev_cxt *lc) +{ + struct sysfs_cxt *sysfs = loopcxt_get_sysfs(lc); + char *res = NULL; + + if (sysfs) + /* + * This is always preffered, the loop_info64 + * has too small buffer for the filename. + */ + res = sysfs_strdup(sysfs, "loop/backing_file"); + + if (!res && loopcxt_ioctl_enabled(lc)) { + struct loop_info64 *lo = loopcxt_get_info(lc); + + if (lo) { + lo->lo_file_name[LO_NAME_SIZE - 2] = '*'; + lo->lo_file_name[LO_NAME_SIZE - 1] = '\0'; + res = strdup((char *) lo->lo_file_name); + } + } + + DBG(CXT, ul_debugobj(lc, "get_backing_file [%s]", res)); + return res; +} + +/* + * @lc: context + * @offset: returns offset number for the given device + * + * Returns: <0 on error, 0 on success + */ +int loopcxt_get_offset(struct loopdev_cxt *lc, uint64_t *offset) +{ + struct sysfs_cxt *sysfs = loopcxt_get_sysfs(lc); + int rc = -EINVAL; + + if (sysfs) + rc = sysfs_read_u64(sysfs, "loop/offset", offset); + + if (rc && loopcxt_ioctl_enabled(lc)) { + struct loop_info64 *lo = loopcxt_get_info(lc); + if (lo) { + if (offset) + *offset = lo->lo_offset; + rc = 0; + } else + rc = -errno; + } + + DBG(CXT, ul_debugobj(lc, "get_offset [rc=%d]", rc)); + return rc; +} + +/* + * @lc: context + * @sizelimit: returns size limit for the given device + * + * Returns: <0 on error, 0 on success + */ +int loopcxt_get_sizelimit(struct loopdev_cxt *lc, uint64_t *size) +{ + struct sysfs_cxt *sysfs = loopcxt_get_sysfs(lc); + int rc = -EINVAL; + + if (sysfs) + rc = sysfs_read_u64(sysfs, "loop/sizelimit", size); + + if (rc && loopcxt_ioctl_enabled(lc)) { + struct loop_info64 *lo = loopcxt_get_info(lc); + if (lo) { + if (size) + *size = lo->lo_sizelimit; + rc = 0; + } else + rc = -errno; + } + + DBG(CXT, ul_debugobj(lc, "get_sizelimit [rc=%d]", rc)); + return rc; +} + +/* + * @lc: context + * @devno: returns encryption type + * + * Cryptoloop is DEPRECATED! + * + * Returns: <0 on error, 0 on success + */ +int loopcxt_get_encrypt_type(struct loopdev_cxt *lc, uint32_t *type) +{ + struct loop_info64 *lo = loopcxt_get_info(lc); + int rc; + + /* not provided by sysfs */ + if (lo) { + if (type) + *type = lo->lo_encrypt_type; + rc = 0; + } else + rc = -errno; + + DBG(CXT, ul_debugobj(lc, "get_encrypt_type [rc=%d]", rc)); + return rc; +} + +/* + * @lc: context + * @devno: returns crypt name + * + * Cryptoloop is DEPRECATED! + * + * Returns: <0 on error, 0 on success + */ +const char *loopcxt_get_crypt_name(struct loopdev_cxt *lc) +{ + struct loop_info64 *lo = loopcxt_get_info(lc); + + if (lo) + return (char *) lo->lo_crypt_name; + + DBG(CXT, ul_debugobj(lc, "get_crypt_name failed")); + return NULL; +} + +/* + * @lc: context + * @devno: returns backing file devno + * + * Returns: <0 on error, 0 on success + */ +int loopcxt_get_backing_devno(struct loopdev_cxt *lc, dev_t *devno) +{ + struct loop_info64 *lo = loopcxt_get_info(lc); + int rc; + + if (lo) { + if (devno) + *devno = lo->lo_device; + rc = 0; + } else + rc = -errno; + + DBG(CXT, ul_debugobj(lc, "get_backing_devno [rc=%d]", rc)); + return rc; +} + +/* + * @lc: context + * @ino: returns backing file inode + * + * Returns: <0 on error, 0 on success + */ +int loopcxt_get_backing_inode(struct loopdev_cxt *lc, ino_t *ino) +{ + struct loop_info64 *lo = loopcxt_get_info(lc); + int rc; + + if (lo) { + if (ino) + *ino = lo->lo_inode; + rc = 0; + } else + rc = -errno; + + DBG(CXT, ul_debugobj(lc, "get_backing_inode [rc=%d]", rc)); + return rc; +} + +/* + * Check if the kernel supports partitioned loop devices. + * + * Notes: + * - kernels < 3.2 support partitioned loop devices and PT scanning + * only if max_part= module paremeter is non-zero + * + * - kernels >= 3.2 always support partitioned loop devices + * + * - kernels >= 3.2 always support BLKPG_{ADD,DEL}_PARTITION ioctls + * + * - kernels >= 3.2 enable PT scanner only if max_part= is non-zero or if the + * LO_FLAGS_PARTSCAN flag is set for the device. The PT scanner is disabled + * by default. + * + * See kernel commit e03c8dd14915fabc101aa495828d58598dc5af98. + */ +int loopmod_supports_partscan(void) +{ + int rc, ret = 0; + FILE *f; + + if (get_linux_version() >= KERNEL_VERSION(3,2,0)) + return 1; + + f = fopen("/sys/module/loop/parameters/max_part", "r"); + if (!f) + return 0; + rc = fscanf(f, "%d", &ret); + fclose(f); + return rc == 1 ? ret : 0; +} + +/* + * @lc: context + * + * Returns: 1 if the partscan flags is set *or* (for old kernels) partitions + * scannig is enabled for all loop devices. + */ +int loopcxt_is_partscan(struct loopdev_cxt *lc) +{ + struct sysfs_cxt *sysfs = loopcxt_get_sysfs(lc); + + if (sysfs) { + /* kernel >= 3.2 */ + int fl; + if (sysfs_read_int(sysfs, "loop/partscan", &fl) == 0) + return fl; + } + + /* old kernels (including kernels without loopN/loop/<flags> directory */ + return loopmod_supports_partscan(); +} + +/* + * @lc: context + * + * Returns: 1 if the autoclear flags is set. + */ +int loopcxt_is_autoclear(struct loopdev_cxt *lc) +{ + struct sysfs_cxt *sysfs = loopcxt_get_sysfs(lc); + + if (sysfs) { + int fl; + if (sysfs_read_int(sysfs, "loop/autoclear", &fl) == 0) + return fl; + } + + if (loopcxt_ioctl_enabled(lc)) { + struct loop_info64 *lo = loopcxt_get_info(lc); + if (lo) + return lo->lo_flags & LO_FLAGS_AUTOCLEAR; + } + return 0; +} + +/* + * @lc: context + * + * Returns: 1 if the readonly flags is set. + */ +int loopcxt_is_readonly(struct loopdev_cxt *lc) +{ + struct sysfs_cxt *sysfs = loopcxt_get_sysfs(lc); + + if (sysfs) { + int fl; + if (sysfs_read_int(sysfs, "ro", &fl) == 0) + return fl; + } + + if (loopcxt_ioctl_enabled(lc)) { + struct loop_info64 *lo = loopcxt_get_info(lc); + if (lo) + return lo->lo_flags & LO_FLAGS_READ_ONLY; + } + return 0; +} + +/* + * @lc: context + * @st: backing file stat or NULL + * @backing_file: filename + * @offset: offset + * @flags: LOOPDEV_FL_OFFSET if @offset should not be ignored + * + * Returns 1 if the current @lc loopdev is associated with the given backing + * file. Note that the preferred way is to use devno and inode number rather + * than filename. The @backing_file filename is poor solution usable in case + * that you don't have rights to call stat(). + * + * Don't forget that old kernels provide very restricted (in size) backing + * filename by LOOP_GET_STAT64 ioctl only. + */ +int loopcxt_is_used(struct loopdev_cxt *lc, + struct stat *st, + const char *backing_file, + uint64_t offset, + int flags) +{ + ino_t ino; + dev_t dev; + + if (!lc) + return 0; + + DBG(CXT, ul_debugobj(lc, "checking %s vs. %s", + loopcxt_get_device(lc), + backing_file)); + + if (st && loopcxt_get_backing_inode(lc, &ino) == 0 && + loopcxt_get_backing_devno(lc, &dev) == 0) { + + if (ino == st->st_ino && dev == st->st_dev) + goto found; + + /* don't use filename if we have devno and inode */ + return 0; + } + + /* poor man's solution */ + if (backing_file) { + char *name = loopcxt_get_backing_file(lc); + int rc = name && strcmp(name, backing_file) == 0; + + free(name); + if (rc) + goto found; + } + + return 0; +found: + if (flags & LOOPDEV_FL_OFFSET) { + uint64_t off; + + return loopcxt_get_offset(lc, &off) == 0 && off == offset; + } + return 1; +} + +/* + * The setting is removed by loopcxt_set_device() loopcxt_next()! + */ +int loopcxt_set_offset(struct loopdev_cxt *lc, uint64_t offset) +{ + if (!lc) + return -EINVAL; + lc->info.lo_offset = offset; + + DBG(CXT, ul_debugobj(lc, "set offset=%jd", offset)); + return 0; +} + +/* + * The setting is removed by loopcxt_set_device() loopcxt_next()! + */ +int loopcxt_set_sizelimit(struct loopdev_cxt *lc, uint64_t sizelimit) +{ + if (!lc) + return -EINVAL; + lc->info.lo_sizelimit = sizelimit; + + DBG(CXT, ul_debugobj(lc, "set sizelimit=%jd", sizelimit)); + return 0; +} + +/* + * @lc: context + * @flags: kernel LO_FLAGS_{READ_ONLY,USE_AOPS,AUTOCLEAR} flags + * + * The setting is removed by loopcxt_set_device() loopcxt_next()! + * + * Returns: 0 on success, <0 on error. + */ +int loopcxt_set_flags(struct loopdev_cxt *lc, uint32_t flags) +{ + if (!lc) + return -EINVAL; + lc->info.lo_flags = flags; + + DBG(CXT, ul_debugobj(lc, "set flags=%u", (unsigned) flags)); + return 0; +} + +/* + * @lc: context + * @filename: backing file path (the path will be canonicalized) + * + * The setting is removed by loopcxt_set_device() loopcxt_next()! + * + * Returns: 0 on success, <0 on error. + */ +int loopcxt_set_backing_file(struct loopdev_cxt *lc, const char *filename) +{ + if (!lc) + return -EINVAL; + + lc->filename = canonicalize_path(filename); + if (!lc->filename) + return -errno; + + strncpy((char *)lc->info.lo_file_name, lc->filename, LO_NAME_SIZE); + lc->info.lo_file_name[LO_NAME_SIZE- 1] = '\0'; + + DBG(CXT, ul_debugobj(lc, "set backing file=%s", lc->info.lo_file_name)); + return 0; +} + +/* + * In kernels prior to v3.9, if the offset or sizelimit options + * are used, the block device's size won't be synced automatically. + * blockdev --getsize64 and filesystems will use the backing + * file size until the block device has been re-opened or the + * LOOP_SET_CAPACITY ioctl is called to sync the sizes. + * + * Since mount -oloop uses the LO_FLAGS_AUTOCLEAR option and passes + * the open file descriptor to the mount system call, we need to use + * the ioctl. Calling losetup directly doesn't have this problem since + * it closes the device when it exits and whatever consumes the device + * next will re-open it, causing the resync. + */ +static int loopcxt_check_size(struct loopdev_cxt *lc, int file_fd) +{ + uint64_t size, expected_size; + int dev_fd; + struct stat st; + + if (!lc->info.lo_offset && !lc->info.lo_sizelimit) + return 0; + + if (fstat(file_fd, &st)) { + DBG(CXT, ul_debugobj(lc, "failed to fstat backing file")); + return -errno; + } + if (S_ISBLK(st.st_mode)) { + if (blkdev_get_size(file_fd, + (unsigned long long *) &expected_size)) { + DBG(CXT, ul_debugobj(lc, "failed to determine device size")); + return -errno; + } + } else + expected_size = st.st_size; + + if (expected_size == 0 || expected_size <= lc->info.lo_offset) { + DBG(CXT, ul_debugobj(lc, "failed to determine expected size")); + return 0; /* ignore this error */ + } + + if (lc->info.lo_offset > 0) + expected_size -= lc->info.lo_offset; + + if (lc->info.lo_sizelimit > 0 && lc->info.lo_sizelimit < expected_size) + expected_size = lc->info.lo_sizelimit; + + dev_fd = loopcxt_get_fd(lc); + if (dev_fd < 0) { + DBG(CXT, ul_debugobj(lc, "failed to get loop FD")); + return -errno; + } + + if (blkdev_get_size(dev_fd, (unsigned long long *) &size)) { + DBG(CXT, ul_debugobj(lc, "failed to determine loopdev size")); + return -errno; + } + + /* It's block device, so, align to 512-byte sectors */ + if (expected_size % 512) { + DBG(CXT, ul_debugobj(lc, "expected size misaligned to 512-byte sectors")); + expected_size = (expected_size >> 9) << 9; + } + + if (expected_size != size) { + DBG(CXT, ul_debugobj(lc, "warning: loopdev and expected " + "size dismatch (%ju/%ju)", + size, expected_size)); + + if (loopcxt_set_capacity(lc)) { + /* ioctl not available */ + if (errno == ENOTTY || errno == EINVAL) + errno = ERANGE; + return -errno; + } + + if (blkdev_get_size(dev_fd, (unsigned long long *) &size)) + return -errno; + + if (expected_size != size) { + errno = ERANGE; + DBG(CXT, ul_debugobj(lc, "failed to set loopdev size, " + "size: %ju, expected: %ju", + size, expected_size)); + return -errno; + } + } + + return 0; +} + +/* + * @cl: context + * + * Associate the current device (see loopcxt_{set,get}_device()) with + * a file (see loopcxt_set_backing_file()). + * + * The device is initialized read-write by default. If you want read-only + * device then set LO_FLAGS_READ_ONLY by loopcxt_set_flags(). The LOOPDEV_FL_* + * flags are ignored and modified according to LO_FLAGS_*. + * + * If the device is already open by loopcxt_get_fd() then this setup device + * function will re-open the device to fix read/write mode. + * + * The device is also initialized read-only if the backing file is not + * possible to open read-write (e.g. read-only FS). + * + * Returns: <0 on error, 0 on success. + */ +int loopcxt_setup_device(struct loopdev_cxt *lc) +{ + int file_fd, dev_fd, mode = O_RDWR, rc = -1, cnt = 0; + + if (!lc || !*lc->device || !lc->filename) + return -EINVAL; + + DBG(SETUP, ul_debugobj(lc, "device setup requested")); + + /* + * Open backing file and device + */ + if (lc->info.lo_flags & LO_FLAGS_READ_ONLY) + mode = O_RDONLY; + + if ((file_fd = open(lc->filename, mode | O_CLOEXEC)) < 0) { + if (mode != O_RDONLY && (errno == EROFS || errno == EACCES)) + file_fd = open(lc->filename, mode = O_RDONLY); + + if (file_fd < 0) { + DBG(SETUP, ul_debugobj(lc, "open backing file failed: %m")); + return -errno; + } + } + DBG(SETUP, ul_debugobj(lc, "backing file open: OK")); + + if (lc->fd != -1 && lc->mode != mode) { + DBG(SETUP, ul_debugobj(lc, "closing already open device (mode mismatch)")); + close(lc->fd); + lc->fd = -1; + lc->mode = 0; + } + + if (mode == O_RDONLY) { + lc->flags |= LOOPDEV_FL_RDONLY; /* open() mode */ + lc->info.lo_flags |= LO_FLAGS_READ_ONLY; /* kernel loopdev mode */ + } else { + lc->flags |= LOOPDEV_FL_RDWR; /* open() mode */ + lc->info.lo_flags &= ~LO_FLAGS_READ_ONLY; + lc->flags &= ~LOOPDEV_FL_RDONLY; + } + + do { + errno = 0; + dev_fd = loopcxt_get_fd(lc); + if (dev_fd >= 0 || lc->control_ok == 0) + break; + if (errno != EACCES && errno != ENOENT) + break; + /* We have permissions to open /dev/loop-control, but open + * /dev/loopN failed with EACCES, it's probably because udevd + * does not applied chown yet. Let's wait a moment. */ + usleep(25000); + } while (cnt++ < 16); + + if (dev_fd < 0) { + rc = -errno; + goto err; + } + + DBG(SETUP, ul_debugobj(lc, "device open: OK")); + + /* + * Set FD + */ + if (ioctl(dev_fd, LOOP_SET_FD, file_fd) < 0) { + rc = -errno; + DBG(SETUP, ul_debugobj(lc, "LOOP_SET_FD failed: %m")); + goto err; + } + + DBG(SETUP, ul_debugobj(lc, "LOOP_SET_FD: OK")); + + if (ioctl(dev_fd, LOOP_SET_STATUS64, &lc->info)) { + DBG(SETUP, ul_debugobj(lc, "LOOP_SET_STATUS64 failed: %m")); + goto err; + } + + DBG(SETUP, ul_debugobj(lc, "LOOP_SET_STATUS64: OK")); + + if ((rc = loopcxt_check_size(lc, file_fd))) + goto err; + + close(file_fd); + + memset(&lc->info, 0, sizeof(lc->info)); + lc->has_info = 0; + lc->info_failed = 0; + + DBG(SETUP, ul_debugobj(lc, "success [rc=0]")); + return 0; +err: + if (file_fd >= 0) + close(file_fd); + if (dev_fd >= 0 && rc != -EBUSY) + ioctl(dev_fd, LOOP_CLR_FD, 0); + + DBG(SETUP, ul_debugobj(lc, "failed [rc=%d]", rc)); + return rc; +} + +int loopcxt_set_capacity(struct loopdev_cxt *lc) +{ + int fd = loopcxt_get_fd(lc); + + if (fd < 0) + return -EINVAL; + + /* Kernels prior to v2.6.30 don't support this ioctl */ + if (ioctl(fd, LOOP_SET_CAPACITY, 0) < 0) { + int rc = -errno; + DBG(CXT, ul_debugobj(lc, "LOOP_SET_CAPACITY failed: %m")); + return rc; + } + + DBG(CXT, ul_debugobj(lc, "capacity set")); + return 0; +} + +int loopcxt_delete_device(struct loopdev_cxt *lc) +{ + int fd = loopcxt_get_fd(lc); + + if (fd < 0) + return -EINVAL; + + if (ioctl(fd, LOOP_CLR_FD, 0) < 0) { + DBG(CXT, ul_debugobj(lc, "LOOP_CLR_FD failed: %m")); + return -errno; + } + + DBG(CXT, ul_debugobj(lc, "device removed")); + return 0; +} + +int loopcxt_add_device(struct loopdev_cxt *lc) +{ + int rc = -EINVAL; + int ctl, nr = -1; + const char *p, *dev = loopcxt_get_device(lc); + + if (!dev) + goto done; + + if (!(lc->flags & LOOPDEV_FL_CONTROL)) { + rc = -ENOSYS; + goto done; + } + + p = strrchr(dev, '/'); + if (!p || (sscanf(p, "/loop%d", &nr) != 1 && sscanf(p, "/%d", &nr) != 1) + || nr < 0) + goto done; + + ctl = open(_PATH_DEV_LOOPCTL, O_RDWR|O_CLOEXEC); + if (ctl >= 0) { + DBG(CXT, ul_debugobj(lc, "add_device %d", nr)); + rc = ioctl(ctl, LOOP_CTL_ADD, nr); + close(ctl); + } + lc->control_ok = rc >= 0 ? 1 : 0; +done: + DBG(CXT, ul_debugobj(lc, "add_device done [rc=%d]", rc)); + return rc; +} + +/* + * Note that LOOP_CTL_GET_FREE ioctl is supported since kernel 3.1. In older + * kernels we have to check all loop devices to found unused one. + * + * See kernel commit 770fe30a46a12b6fb6b63fbe1737654d28e8484. + */ +int loopcxt_find_unused(struct loopdev_cxt *lc) +{ + int rc = -1; + + DBG(CXT, ul_debugobj(lc, "find_unused requested")); + + if (lc->flags & LOOPDEV_FL_CONTROL) { + int ctl = open(_PATH_DEV_LOOPCTL, O_RDWR|O_CLOEXEC); + + if (ctl >= 0) + rc = ioctl(ctl, LOOP_CTL_GET_FREE); + if (rc >= 0) { + char name[16]; + snprintf(name, sizeof(name), "loop%d", rc); + + rc = loopiter_set_device(lc, name); + } + lc->control_ok = ctl >= 0 && rc == 0 ? 1 : 0; + if (ctl >= 0) + close(ctl); + DBG(CXT, ul_debugobj(lc, "find_unused by loop-control [rc=%d]", rc)); + } + + if (rc < 0) { + rc = loopcxt_init_iterator(lc, LOOPITER_FL_FREE); + if (rc) + return rc; + + rc = loopcxt_next(lc); + loopcxt_deinit_iterator(lc); + DBG(CXT, ul_debugobj(lc, "find_unused by scan [rc=%d]", rc)); + } + return rc; +} + + + +/* + * Return: TRUE/FALSE + */ +int loopdev_is_autoclear(const char *device) +{ + struct loopdev_cxt lc; + int rc; + + if (!device) + return 0; + + rc = loopcxt_init(&lc, 0); + if (!rc) + rc = loopcxt_set_device(&lc, device); + if (!rc) + rc = loopcxt_is_autoclear(&lc); + + loopcxt_deinit(&lc); + return rc; +} + +char *loopdev_get_backing_file(const char *device) +{ + struct loopdev_cxt lc; + char *res = NULL; + + if (!device) + return NULL; + if (loopcxt_init(&lc, 0)) + return NULL; + if (loopcxt_set_device(&lc, device) == 0) + res = loopcxt_get_backing_file(&lc); + + loopcxt_deinit(&lc); + return res; +} + +/* + * Returns: TRUE/FALSE + */ +int loopdev_is_used(const char *device, const char *filename, + uint64_t offset, int flags) +{ + struct loopdev_cxt lc; + struct stat st; + int rc = 0; + + if (!device || !filename) + return 0; + + rc = loopcxt_init(&lc, 0); + if (!rc) + rc = loopcxt_set_device(&lc, device); + if (rc) + return rc; + + rc = !stat(filename, &st); + rc = loopcxt_is_used(&lc, rc ? &st : NULL, filename, offset, flags); + + loopcxt_deinit(&lc); + return rc; +} + +int loopdev_delete(const char *device) +{ + struct loopdev_cxt lc; + int rc; + + if (!device) + return -EINVAL; + + rc = loopcxt_init(&lc, 0); + if (!rc) + rc = loopcxt_set_device(&lc, device); + if (!rc) + rc = loopcxt_delete_device(&lc); + loopcxt_deinit(&lc); + return rc; +} + +/* + * Returns: 0 = success, < 0 error, 1 not found + */ +int loopcxt_find_by_backing_file(struct loopdev_cxt *lc, const char *filename, + uint64_t offset, int flags) +{ + int rc, hasst; + struct stat st; + + if (!filename) + return -EINVAL; + + hasst = !stat(filename, &st); + + rc = loopcxt_init_iterator(lc, LOOPITER_FL_USED); + if (rc) + return rc; + + while ((rc = loopcxt_next(lc)) == 0) { + + if (loopcxt_is_used(lc, hasst ? &st : NULL, + filename, offset, flags)) + break; + } + + loopcxt_deinit_iterator(lc); + return rc; +} + +/* + * Returns allocated string with device name + */ +char *loopdev_find_by_backing_file(const char *filename, uint64_t offset, int flags) +{ + struct loopdev_cxt lc; + char *res = NULL; + + if (!filename) + return NULL; + + if (loopcxt_init(&lc, 0)) + return NULL; + if (loopcxt_find_by_backing_file(&lc, filename, offset, flags) == 0) + res = loopcxt_strdup_device(&lc); + loopcxt_deinit(&lc); + + return res; +} + +/* + * Returns number of loop devices associated with @file, if only one loop + * device is associeted with the given @filename and @loopdev is not NULL then + * @loopdev returns name of the device. + */ +int loopdev_count_by_backing_file(const char *filename, char **loopdev) +{ + struct loopdev_cxt lc; + int count = 0, rc; + + if (!filename) + return -1; + + rc = loopcxt_init(&lc, 0); + if (rc) + return rc; + if (loopcxt_init_iterator(&lc, LOOPITER_FL_USED)) + return -1; + + while(loopcxt_next(&lc) == 0) { + char *backing = loopcxt_get_backing_file(&lc); + + if (!backing || strcmp(backing, filename)) { + free(backing); + continue; + } + + free(backing); + if (loopdev && count == 0) + *loopdev = loopcxt_strdup_device(&lc); + count++; + } + + loopcxt_deinit(&lc); + + if (loopdev && count > 1) { + free(*loopdev); + *loopdev = NULL; + } + return count; +} + diff --git a/libblkid/lib/mangle.c b/libblkid/lib/mangle.c new file mode 100644 index 000000000..5236e97bf --- /dev/null +++ b/libblkid/lib/mangle.c @@ -0,0 +1,166 @@ +/* + * Functions for \oct encoding used in mtab/fstab/swaps/etc. + * + * Based on code from mount(8). + * + * Copyright (C) 2010 Karel Zak <kzak@redhat.com> + */ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <ctype.h> + +#include "mangle.h" +#include "c.h" + +#define isoctal(a) (((a) & ~7) == '0') + +#define from_hex(c) (isdigit(c) ? c - '0' : tolower(c) - 'a' + 10) + +#define is_unwanted_char(x) (strchr(" \t\n\\", (unsigned int) x) != NULL) + + +char *mangle(const char *s) +{ + char *ss, *sp; + + if (!s) + return NULL; + + ss = sp = malloc(4 * strlen(s) + 1); + if (!sp) + return NULL; + while(1) { + if (!*s) { + *sp = '\0'; + break; + } + if (is_unwanted_char(*s)) { + *sp++ = '\\'; + *sp++ = '0' + ((*s & 0300) >> 6); + *sp++ = '0' + ((*s & 070) >> 3); + *sp++ = '0' + (*s & 07); + } else + *sp++ = *s; + s++; + } + return ss; +} + + +void unmangle_to_buffer(const char *s, char *buf, size_t len) +{ + size_t sz = 0; + + if (!s) + return; + + while(*s && sz < len - 1) { + if (*s == '\\' && sz + 3 < len - 1 && isoctal(s[1]) && + isoctal(s[2]) && isoctal(s[3])) { + + *buf++ = 64*(s[1] & 7) + 8*(s[2] & 7) + (s[3] & 7); + s += 4; + sz += 4; + } else { + *buf++ = *s++; + sz++; + } + } + *buf = '\0'; +} + +void unhexmangle_to_buffer(const char *s, char *buf, size_t len) +{ + size_t sz = 0; + + if (!s) + return; + + while(*s && sz < len - 1) { + if (*s == '\\' && sz + 3 < len - 1 && s[1] == 'x' && + isxdigit(s[2]) && isxdigit(s[3])) { + + *buf++ = from_hex(s[2]) << 4 | from_hex(s[3]); + s += 4; + sz += 4; + } else { + *buf++ = *s++; + sz++; + } + } + *buf = '\0'; +} + +static inline char *skip_nonspaces(const char *s) +{ + while (*s && !(*s == ' ' || *s == '\t')) + s++; + return (char *) s; +} + +/* + * Returns mallocated buffer or NULL in case of error. + */ +char *unmangle(const char *s, char **end) +{ + char *buf; + char *e; + size_t sz; + + if (!s) + return NULL; + + e = skip_nonspaces(s); + sz = e - s + 1; + + if (end) + *end = e; + if (e == s) + return NULL; /* empty string */ + + buf = malloc(sz); + if (!buf) + return NULL; + + unmangle_to_buffer(s, buf, sz); + return buf; +} + +#ifdef TEST_PROGRAM +#include <errno.h> +int main(int argc, char *argv[]) +{ + char *p = NULL; + if (argc < 3) { + fprintf(stderr, "usage: %s --mangle|unmangle <string>\n", + program_invocation_short_name); + return EXIT_FAILURE; + } + + if (!strcmp(argv[1], "--mangle")) { + p = mangle(argv[2]); + printf("mangled: '%s'\n", p); + free(p); + } + + else if (!strcmp(argv[1], "--unmangle")) { + char *x = unmangle(argv[2], NULL); + + if (x) { + printf("unmangled: '%s'\n", x); + free(x); + } + + x = strdup(argv[2]); + unmangle_to_buffer(x, x, strlen(x) + 1); + + if (x) { + printf("self-unmangled: '%s'\n", x); + free(x); + } + } + + return EXIT_SUCCESS; +} +#endif /* TEST_PROGRAM */ diff --git a/libblkid/lib/match.c b/libblkid/lib/match.c new file mode 100644 index 000000000..9be82b0cc --- /dev/null +++ b/libblkid/lib/match.c @@ -0,0 +1,53 @@ +/* + * Copyright (C) 2011 Karel Zak <kzak@redhat.com> + * + * This file may be redistributed under the terms of the + * GNU Lesser General Public License. + */ + +#include <string.h> + +#include "match.h" + +/* + * match_fstype: + * @type: filesystem type + * @pattern: filesystem name or comma delimited list of names + * + * The @pattern list of filesystem can be prefixed with a global + * "no" prefix to invert matching of the whole list. The "no" could + * also be used for individual items in the @pattern list. So, + * "nofoo,bar" has the same meaning as "nofoo,nobar". + */ +int match_fstype(const char *type, const char *pattern) +{ + int no = 0; /* negated types list */ + int len; + const char *p; + + if (!pattern && !type) + return 1; + if (!pattern) + return 0; + + if (!strncmp(pattern, "no", 2)) { + no = 1; + pattern += 2; + } + + /* Does type occur in types, separated by commas? */ + len = strlen(type); + p = pattern; + while(1) { + if (!strncmp(p, "no", 2) && !strncmp(p+2, type, len) && + (p[len+2] == 0 || p[len+2] == ',')) + return 0; + if (strncmp(p, type, len) == 0 && (p[len] == 0 || p[len] == ',')) + return !no; + p = strchr(p,','); + if (!p) + break; + p++; + } + return no; +} diff --git a/libblkid/lib/mbsalign.c b/libblkid/lib/mbsalign.c new file mode 100644 index 000000000..5e52e8f44 --- /dev/null +++ b/libblkid/lib/mbsalign.c @@ -0,0 +1,466 @@ +/* Align/Truncate a string in a given screen width + Copyright (C) 2009-2010 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation, either version 2.1 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +/* Written by Pádraig Brady. */ + +#include <config.h> + +#include <stdlib.h> +#include <string.h> +#include <stdio.h> +#include <stdbool.h> +#include <limits.h> +#include <ctype.h> + +#include "c.h" +#include "mbsalign.h" +#include "widechar.h" + +#ifdef HAVE_WIDECHAR +/* Replace non printable chars. + Note \t and \n etc. are non printable. + Return 1 if replacement made, 0 otherwise. */ + +/* + * Counts number of cells in multibyte string. For all control and + * non-printable chars is the result width enlarged to store \x?? hex + * sequence. See mbs_safe_encode(). + * + * Returns: number of cells, @sz returns number of bytes. + */ +size_t mbs_safe_nwidth(const char *buf, size_t bufsz, size_t *sz) +{ + mbstate_t st; + const char *p = buf, *last = buf; + size_t width = 0, bytes = 0; + + memset(&st, 0, sizeof(st)); + + if (p && *p && bufsz) + last = p + (bufsz - 1); + + while (p && *p && p <= last) { + if (iscntrl((unsigned char) *p)) { + width += 4, bytes += 4; /* *p encoded to \x?? */ + p++; + } +#ifdef HAVE_WIDECHAR + else { + wchar_t wc; + size_t len = mbrtowc(&wc, p, MB_CUR_MAX, &st); + + if (len == 0) + break; + + if (len == (size_t) -1 || len == (size_t) -2) { + len = 1; + if (isprint((unsigned char) *p)) + width += 1, bytes += 1; + else + width += 4, bytes += 4; + + } else if (!iswprint(wc)) { + width += len * 4; /* hex encode whole sequence */ + bytes += len * 4; + } else { + width += wcwidth(wc); /* number of cells */ + bytes += len; /* number of bytes */ + } + p += len; + } +#else + else if (!isprint((unsigned char) *p)) { + width += 4, bytes += 4; /* *p encoded to \x?? */ + p++; + } else { + width++, bytes++; + p++; + } +#endif + } + + if (sz) + *sz = bytes; + return width; +} + +size_t mbs_safe_width(const char *s) +{ + if (!s || !*s) + return 0; + return mbs_safe_nwidth(s, strlen(s), NULL); +} + +/* + * Copy @s to @buf and replace control and non-printable chars with + * \x?? hex sequence. The @width returns number of cells. + * + * The @buf has to be big enough to store mbs_safe_encode_size(strlen(s))) + * bytes. + */ +char *mbs_safe_encode_to_buffer(const char *s, size_t *width, char *buf) +{ + mbstate_t st; + const char *p = s; + char *r; + size_t sz = s ? strlen(s) : 0; + + if (!sz || !buf) + return NULL; + + memset(&st, 0, sizeof(st)); + + r = buf; + *width = 0; + + while (p && *p) { + if (iscntrl((unsigned char) *p)) { + sprintf(r, "\\x%02x", (unsigned char) *p); + r += 4; + *width += 4; + p++; + } +#ifdef HAVE_WIDECHAR + else { + wchar_t wc; + size_t len = mbrtowc(&wc, p, MB_CUR_MAX, &st); + + if (len == 0) + break; /* end of string */ + + if (len == (size_t) -1 || len == (size_t) -2) { + len = 1; + /* + * Not valid multibyte sequence -- maybe it's + * printable char according to the current locales. + */ + if (!isprint((unsigned char) *p)) { + sprintf(r, "\\x%02x", (unsigned char) *p); + r += 4; + *width += 4; + } else { + width++; + *r++ = *p; + } + } else if (!iswprint(wc)) { + size_t i; + for (i = 0; i < len; i++) { + sprintf(r, "\\x%02x", (unsigned char) *p); + r += 4; + *width += 4; + } + } else { + memcpy(r, p, len); + r += len; + *width += wcwidth(wc); + } + p += len; + } +#else + else if (!isprint((unsigned char) *p)) { + sprintf(r, "\\x%02x", (unsigned char) *p); + p++; + r += 4; + *width += 4; + } else { + *r++ = *p++; + *width++; + } +#endif + } + + *r = '\0'; + + return buf; +} + +size_t mbs_safe_encode_size(size_t bytes) +{ + return (bytes * 4) + 1; +} + +/* + * Returns allocated string where all control and non-printable chars are + * replaced with \x?? hex sequence. + */ +char *mbs_safe_encode(const char *s, size_t *width) +{ + size_t sz = s ? strlen(s) : 0; + char *buf; + + if (!sz) + return NULL; + buf = malloc(mbs_safe_encode_size(sz)); + if (!buf) + return NULL; + + return mbs_safe_encode_to_buffer(s, width, buf); +} + +static bool +wc_ensure_printable (wchar_t *wchars) +{ + bool replaced = false; + wchar_t *wc = wchars; + while (*wc) + { + if (!iswprint ((wint_t) *wc)) + { + *wc = 0xFFFD; /* L'\uFFFD' (replacement char) */ + replaced = true; + } + wc++; + } + return replaced; +} + +/* Truncate wchar string to width cells. + * Returns number of cells used. */ + +static size_t +wc_truncate (wchar_t *wc, size_t width) +{ + size_t cells = 0; + int next_cells = 0; + + while (*wc) + { + next_cells = wcwidth (*wc); + if (next_cells == -1) /* non printable */ + { + *wc = 0xFFFD; /* L'\uFFFD' (replacement char) */ + next_cells = 1; + } + if (cells + next_cells > width) + break; + cells += next_cells; + wc++; + } + *wc = L'\0'; + return cells; +} + +/* FIXME: move this function to gnulib as it's missing on: + OpenBSD 3.8, IRIX 5.3, Solaris 2.5.1, mingw, BeOS */ + +static int +rpl_wcswidth (const wchar_t *s, size_t n) +{ + int ret = 0; + + while (n-- > 0 && *s != L'\0') + { + int nwidth = wcwidth (*s++); + if (nwidth == -1) /* non printable */ + return -1; + if (ret > (INT_MAX - nwidth)) /* overflow */ + return -1; + ret += nwidth; + } + + return ret; +} +#endif + +/* Truncate multi-byte string to @width and returns number of + * bytes of the new string @str, and in @width returns number + * of cells. + */ +size_t +mbs_truncate(char *str, size_t *width) +{ + ssize_t bytes = strlen(str); +#ifdef HAVE_WIDECHAR + ssize_t sz = mbstowcs(NULL, str, 0); + wchar_t *wcs = NULL; + + if (sz == (ssize_t) -1) + goto done; + + wcs = malloc((sz + 1) * sizeof(wchar_t)); + if (!wcs) + goto done; + + if (!mbstowcs(wcs, str, sz)) + goto done; + *width = wc_truncate(wcs, *width); + bytes = wcstombs(str, wcs, bytes); +done: + free(wcs); +#else + if (*width < bytes) + bytes = *width; +#endif + if (bytes >= 0) + str[bytes] = '\0'; + return bytes; +} + +/* Write N_SPACES space characters to DEST while ensuring + nothing is written beyond DEST_END. A terminating NUL + is always added to DEST. + A pointer to the terminating NUL is returned. */ + +static char* +mbs_align_pad (char *dest, const char* dest_end, size_t n_spaces) +{ + /* FIXME: Should we pad with "figure space" (\u2007) + if non ascii data present? */ + for (/* nothing */; n_spaces && (dest < dest_end); n_spaces--) + *dest++ = ' '; + *dest = '\0'; + return dest; +} + +/* Align a string, SRC, in a field of *WIDTH columns, handling multi-byte + characters; write the result into the DEST_SIZE-byte buffer, DEST. + ALIGNMENT specifies whether to left- or right-justify or to center. + If SRC requires more than *WIDTH columns, truncate it to fit. + When centering, the number of trailing spaces may be one less than the + number of leading spaces. The FLAGS parameter is unused at present. + Return the length in bytes required for the final result, not counting + the trailing NUL. A return value of DEST_SIZE or larger means there + wasn't enough space. DEST will be NUL terminated in any case. + Return (size_t) -1 upon error (invalid multi-byte sequence in SRC, + or malloc failure), unless MBA_UNIBYTE_FALLBACK is specified. + Update *WIDTH to indicate how many columns were used before padding. */ + +size_t +mbsalign (const char *src, char *dest, size_t dest_size, + size_t *width, mbs_align_t align, int flags) +{ + size_t ret = -1; + size_t src_size = strlen (src) + 1; + char *newstr = NULL; + wchar_t *str_wc = NULL; + const char *str_to_print = src; + size_t n_cols = src_size - 1; + size_t n_used_bytes = n_cols; /* Not including NUL */ + size_t n_spaces = 0, space_left; + bool conversion = false; + bool wc_enabled = false; + +#ifdef HAVE_WIDECHAR + /* In multi-byte locales convert to wide characters + to allow easy truncation. Also determine number + of screen columns used. */ + if (MB_CUR_MAX > 1) + { + size_t src_chars = mbstowcs (NULL, src, 0); + if (src_chars == (size_t) -1) + { + if (flags & MBA_UNIBYTE_FALLBACK) + goto mbsalign_unibyte; + else + goto mbsalign_cleanup; + } + src_chars += 1; /* make space for NUL */ + str_wc = malloc (src_chars * sizeof (wchar_t)); + if (str_wc == NULL) + { + if (flags & MBA_UNIBYTE_FALLBACK) + goto mbsalign_unibyte; + else + goto mbsalign_cleanup; + } + if (mbstowcs (str_wc, src, src_chars) != 0) + { + str_wc[src_chars - 1] = L'\0'; + wc_enabled = true; + conversion = wc_ensure_printable (str_wc); + n_cols = rpl_wcswidth (str_wc, src_chars); + } + } + + /* If we transformed or need to truncate the source string + then create a modified copy of it. */ + if (wc_enabled && (conversion || (n_cols > *width))) + { + if (conversion) + { + /* May have increased the size by converting + \t to \uFFFD for example. */ + src_size = wcstombs(NULL, str_wc, 0) + 1; + } + newstr = malloc (src_size); + if (newstr == NULL) + { + if (flags & MBA_UNIBYTE_FALLBACK) + goto mbsalign_unibyte; + else + goto mbsalign_cleanup; + } + str_to_print = newstr; + n_cols = wc_truncate (str_wc, *width); + n_used_bytes = wcstombs (newstr, str_wc, src_size); + } +#endif + +mbsalign_unibyte: + + if (n_cols > *width) /* Unibyte truncation required. */ + { + n_cols = *width; + n_used_bytes = n_cols; + } + + if (*width > n_cols) /* Padding required. */ + n_spaces = *width - n_cols; + + /* indicate to caller how many cells needed (not including padding). */ + *width = n_cols; + + /* indicate to caller how many bytes needed (not including NUL). */ + ret = n_used_bytes + (n_spaces * 1); + + /* Write as much NUL terminated output to DEST as possible. */ + if (dest_size != 0) + { + char *dest_end = dest + dest_size - 1; + size_t start_spaces; + size_t end_spaces; + + switch (align) + { + case MBS_ALIGN_CENTER: + start_spaces = n_spaces / 2 + n_spaces % 2; + end_spaces = n_spaces / 2; + break; + case MBS_ALIGN_LEFT: + start_spaces = 0; + end_spaces = n_spaces; + break; + case MBS_ALIGN_RIGHT: + start_spaces = n_spaces; + end_spaces = 0; + break; + default: + abort(); + } + + dest = mbs_align_pad (dest, dest_end, start_spaces); + space_left = dest_end - dest; + dest = memcpy (dest, str_to_print, min (n_used_bytes, space_left)); + mbs_align_pad (dest, dest_end, end_spaces); + } + +mbsalign_cleanup: + + free (str_wc); + free (newstr); + + return ret; +} diff --git a/libblkid/lib/md5.c b/libblkid/lib/md5.c new file mode 100644 index 000000000..488d16ef6 --- /dev/null +++ b/libblkid/lib/md5.c @@ -0,0 +1,257 @@ +/* + * This code implements the MD5 message-digest algorithm. + * The algorithm is due to Ron Rivest. This code was + * written by Colin Plumb in 1993, no copyright is claimed. + * This code is in the public domain; do with it what you wish. + * + * Equivalent code is available from RSA Data Security, Inc. + * This code has been tested against that, and is equivalent, + * except that you don't need to include two pages of legalese + * with every copy. + * + * To compute the message digest of a chunk of bytes, declare an + * MD5Context structure, pass it to MD5Init, call MD5Update as + * needed on buffers full of bytes, and then call MD5Final, which + * will fill a supplied 16-byte array with the digest. + */ +#include <string.h> /* for memcpy() */ + +#include "md5.h" + +#if !defined(WORDS_BIGENDIAN) +#define byteReverse(buf, len) /* Nothing */ +#else +void byteReverse(unsigned char *buf, unsigned longs); + +#ifndef ASM_MD5 +/* + * Note: this code is harmless on little-endian machines. + */ +void byteReverse(unsigned char *buf, unsigned longs) +{ + uint32_t t; + do { + t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 | + ((unsigned) buf[1] << 8 | buf[0]); + *(uint32_t *) buf = t; + buf += 4; + } while (--longs); +} +#endif +#endif + +/* + * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious + * initialization constants. + */ +void MD5Init(struct MD5Context *ctx) +{ + ctx->buf[0] = 0x67452301; + ctx->buf[1] = 0xefcdab89; + ctx->buf[2] = 0x98badcfe; + ctx->buf[3] = 0x10325476; + + ctx->bits[0] = 0; + ctx->bits[1] = 0; +} + +/* + * Update context to reflect the concatenation of another buffer full + * of bytes. + */ +void MD5Update(struct MD5Context *ctx, unsigned char const *buf, unsigned len) +{ + uint32_t t; + + /* Update bitcount */ + + t = ctx->bits[0]; + if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) + ctx->bits[1]++; /* Carry from low to high */ + ctx->bits[1] += len >> 29; + + t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */ + + /* Handle any leading odd-sized chunks */ + + if (t) { + unsigned char *p = (unsigned char *) ctx->in + t; + + t = 64 - t; + if (len < t) { + memcpy(p, buf, len); + return; + } + memcpy(p, buf, t); + byteReverse(ctx->in, 16); + MD5Transform(ctx->buf, (uint32_t *) ctx->in); + buf += t; + len -= t; + } + /* Process data in 64-byte chunks */ + + while (len >= 64) { + memcpy(ctx->in, buf, 64); + byteReverse(ctx->in, 16); + MD5Transform(ctx->buf, (uint32_t *) ctx->in); + buf += 64; + len -= 64; + } + + /* Handle any remaining bytes of data. */ + + memcpy(ctx->in, buf, len); +} + +/* + * Final wrapup - pad to 64-byte boundary with the bit pattern + * 1 0* (64-bit count of bits processed, MSB-first) + */ +void MD5Final(unsigned char digest[MD5LENGTH], struct MD5Context *ctx) +{ + unsigned count; + unsigned char *p; + + /* Compute number of bytes mod 64 */ + count = (ctx->bits[0] >> 3) & 0x3F; + + /* Set the first char of padding to 0x80. This is safe since there is + always at least one byte free */ + p = ctx->in + count; + *p++ = 0x80; + + /* Bytes of padding needed to make 64 bytes */ + count = 64 - 1 - count; + + /* Pad out to 56 mod 64 */ + if (count < 8) { + /* Two lots of padding: Pad the first block to 64 bytes */ + memset(p, 0, count); + byteReverse(ctx->in, 16); + MD5Transform(ctx->buf, (uint32_t *) ctx->in); + + /* Now fill the next block with 56 bytes */ + memset(ctx->in, 0, 56); + } else { + /* Pad block to 56 bytes */ + memset(p, 0, count - 8); + } + byteReverse(ctx->in, 14); + + /* Append length in bits and transform. + * Use memcpy to avoid aliasing problems. On most systems, + * this will be optimized away to the same code. + */ + memcpy(&ctx->in[14 * sizeof(uint32_t)], &ctx->bits[0], 4); + memcpy(&ctx->in[15 * sizeof(uint32_t)], &ctx->bits[1], 4); + + MD5Transform(ctx->buf, (uint32_t *) ctx->in); + byteReverse((unsigned char *) ctx->buf, 4); + memcpy(digest, ctx->buf, MD5LENGTH); + memset(ctx, 0, sizeof(*ctx)); /* In case it's sensitive */ +} + +#ifndef ASM_MD5 + +/* The four core functions - F1 is optimized somewhat */ + +/* #define F1(x, y, z) (x & y | ~x & z) */ +#define F1(x, y, z) (z ^ (x & (y ^ z))) +#define F2(x, y, z) F1(z, x, y) +#define F3(x, y, z) (x ^ y ^ z) +#define F4(x, y, z) (y ^ (x | ~z)) + +/* This is the central step in the MD5 algorithm. */ +#define MD5STEP(f, w, x, y, z, data, s) \ + ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x ) + +/* + * The core of the MD5 algorithm, this alters an existing MD5 hash to + * reflect the addition of 16 longwords of new data. MD5Update blocks + * the data and converts bytes into longwords for this routine. + */ +void MD5Transform(uint32_t buf[4], uint32_t const in[16]) +{ + register uint32_t a, b, c, d; + + a = buf[0]; + b = buf[1]; + c = buf[2]; + d = buf[3]; + + MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); + MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); + MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); + MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); + MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); + MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); + MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); + MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); + MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); + MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); + MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); + MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); + MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); + MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); + MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); + MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); + + MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); + MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); + MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); + MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); + MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); + MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); + MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); + MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); + MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); + MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); + MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); + MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); + MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); + MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); + MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); + MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); + + MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); + MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); + MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); + MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); + MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); + MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); + MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); + MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); + MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); + MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); + MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); + MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); + MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); + MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); + MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); + MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); + + MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); + MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); + MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); + MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); + MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); + MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); + MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); + MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); + MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); + MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); + MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); + MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); + MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); + MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); + MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); + MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); + + buf[0] += a; + buf[1] += b; + buf[2] += c; + buf[3] += d; +} + +#endif + diff --git a/libblkid/lib/monotonic.c b/libblkid/lib/monotonic.c new file mode 100644 index 000000000..3d4a4438e --- /dev/null +++ b/libblkid/lib/monotonic.c @@ -0,0 +1,68 @@ +/* + * Please, don't add this file to libcommon because clock_gettime() requires + * -lrt on systems with old libc. + */ +#include <time.h> +#include <sys/sysinfo.h> +#include <sys/time.h> + +#include "c.h" +#include "nls.h" +#include "monotonic.h" + +int get_boot_time(struct timeval *boot_time) +{ +#ifdef CLOCK_BOOTTIME + struct timespec hires_uptime; + struct timeval lores_uptime; +#endif + struct timeval now; +#ifdef HAVE_SYSINFO + struct sysinfo info; +#endif + + if (gettimeofday(&now, NULL) != 0) { + warn(_("gettimeofday failed")); + return -errno; + } +#ifdef CLOCK_BOOTTIME + if (clock_gettime(CLOCK_BOOTTIME, &hires_uptime) == 0) { + TIMESPEC_TO_TIMEVAL(&lores_uptime, &hires_uptime); + timersub(&now, &lores_uptime, boot_time); + return 0; + } +#endif +#ifdef HAVE_SYSINFO + /* fallback */ + if (sysinfo(&info) != 0) + warn(_("sysinfo failed")); + + boot_time->tv_sec = now.tv_sec - info.uptime; + boot_time->tv_usec = 0; + return 0; +#else + return -ENOSYS; +#endif +} + +int gettime_monotonic(struct timeval *tv) +{ +#ifdef CLOCK_MONOTONIC + /* Can slew only by ntp and adjtime */ + int ret; + struct timespec ts; + +# ifdef CLOCK_MONOTONIC_RAW + /* Linux specific, cant slew */ + if (!(ret = clock_gettime(CLOCK_MONOTONIC_RAW, &ts))) { +# else + if (!(ret = clock_gettime(CLOCK_MONOTONIC, &ts))) { +# endif + tv->tv_sec = ts.tv_sec; + tv->tv_usec = ts.tv_nsec / 1000; + } + return ret; +#else + return gettimeofday(tv, NULL); +#endif +} diff --git a/libblkid/lib/pager.c b/libblkid/lib/pager.c new file mode 100644 index 000000000..9e09cd52b --- /dev/null +++ b/libblkid/lib/pager.c @@ -0,0 +1,210 @@ +/* + * Based on linux-perf/git scm + * + * Some modifications and simplifications for util-linux + * by Davidlohr Bueso <dave@xxxxxxx> - March 2012. + */ + +#include <unistd.h> +#include <stdlib.h> +#include <string.h> +#include <err.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/wait.h> + +#include "c.h" +#include "xalloc.h" +#include "nls.h" + +#define NULL_DEVICE "/dev/null" + +void setup_pager(void); + +static const char *pager_argv[] = { "sh", "-c", NULL, NULL }; + +struct child_process { + const char **argv; + pid_t pid; + int in; + int out; + int err; + unsigned no_stdin:1; + void (*preexec_cb)(void); +}; +static struct child_process pager_process; + +static inline void close_pair(int fd[2]) +{ + close(fd[0]); + close(fd[1]); +} + +static int start_command(struct child_process *cmd) +{ + int need_in; + int fdin[2]; + + /* + * In case of errors we must keep the promise to close FDs + * that have been passed in via ->in and ->out. + */ + need_in = !cmd->no_stdin && cmd->in < 0; + if (need_in) { + if (pipe(fdin) < 0) { + if (cmd->out > 0) + close(cmd->out); + return -1; + } + cmd->in = fdin[1]; + } + + fflush(NULL); + cmd->pid = fork(); + if (!cmd->pid) { + if (need_in) { + dup2(fdin[0], STDIN_FILENO); + close_pair(fdin); + } else if (cmd->in > 0) { + dup2(cmd->in, STDIN_FILENO); + close(cmd->in); + } + + cmd->preexec_cb(); + execvp(cmd->argv[0], (char *const*) cmd->argv); + exit(127); /* cmd not found */ + } + + if (cmd->pid < 0) { + if (need_in) + close_pair(fdin); + else if (cmd->in) + close(cmd->in); + return -1; + } + + if (need_in) + close(fdin[0]); + else if (cmd->in) + close(cmd->in); + return 0; +} + +static int wait_or_whine(pid_t pid) +{ + for (;;) { + int status, code; + pid_t waiting = waitpid(pid, &status, 0); + + if (waiting < 0) { + if (errno == EINTR) + continue; + err(EXIT_FAILURE, _("waitpid failed (%s)"), strerror(errno)); + } + if (waiting != pid) + return -1; + if (WIFSIGNALED(status)) + return -1; + + if (!WIFEXITED(status)) + return -1; + code = WEXITSTATUS(status); + switch (code) { + case 127: + return -1; + case 0: + return 0; + default: + return -1; + } + } +} + +static int finish_command(struct child_process *cmd) +{ + return wait_or_whine(cmd->pid); +} + +static void pager_preexec(void) +{ + /* + * Work around bug in "less" by not starting it until we + * have real input + */ + fd_set in; + + FD_ZERO(&in); + FD_SET(STDIN_FILENO, &in); + select(1, &in, NULL, &in, NULL); + + setenv("LESS", "FRSX", 0); +} + +static void wait_for_pager(void) +{ + fflush(stdout); + fflush(stderr); + /* signal EOF to pager */ + close(STDOUT_FILENO); + close(STDERR_FILENO); + finish_command(&pager_process); +} + +static void wait_for_pager_signal(int signo) +{ + wait_for_pager(); + raise(signo); +} + +void setup_pager(void) +{ + const char *pager = getenv("PAGER"); + + if (!isatty(STDOUT_FILENO)) + return; + + if (!pager) + pager = "less"; + else if (!*pager || !strcmp(pager, "cat")) + return; + + /* spawn the pager */ + pager_argv[2] = pager; + pager_process.argv = pager_argv; + pager_process.in = -1; + pager_process.preexec_cb = pager_preexec; + + if (start_command(&pager_process)) + return; + + /* original process continues, but writes to the pipe */ + dup2(pager_process.in, STDOUT_FILENO); + if (isatty(STDERR_FILENO)) + dup2(pager_process.in, STDERR_FILENO); + close(pager_process.in); + + /* this makes sure that the parent terminates after the pager */ + signal(SIGINT, wait_for_pager_signal); + signal(SIGHUP, wait_for_pager_signal); + signal(SIGTERM, wait_for_pager_signal); + signal(SIGQUIT, wait_for_pager_signal); + signal(SIGPIPE, wait_for_pager_signal); + + atexit(wait_for_pager); +} + +#ifdef TEST_PROGRAM + +#define MAX 255 + +int main(int argc __attribute__ ((__unused__)), + char *argv[] __attribute__ ((__unused__))) +{ + int i; + + setup_pager(); + for (i = 0; i < MAX; i++) + printf("%d\n", i); + return EXIT_SUCCESS; +} +#endif /* TEST_PROGRAM */ diff --git a/libblkid/lib/path.c b/libblkid/lib/path.c new file mode 100644 index 000000000..fc90c0a16 --- /dev/null +++ b/libblkid/lib/path.c @@ -0,0 +1,258 @@ +/* + * Simple functions to access files, paths maybe be globally prefixed by a + * global prefix to read data from alternative destination (e.g. /proc dump for + * regression tests). + * + * Taken from lscpu.c + * + * Copyright (C) 2008 Cai Qian <qcai@redhat.com> + * Copyright (C) 2008-2012 Karel Zak <kzak@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include <stdarg.h> +#include <string.h> +#include <unistd.h> +#include <stdio.h> +#include <inttypes.h> +#include <errno.h> + +#include "all-io.h" +#include "path.h" +#include "nls.h" +#include "c.h" + +static size_t prefixlen; +static char pathbuf[PATH_MAX]; + +static const char * +path_vcreate(const char *path, va_list ap) +{ + if (prefixlen) + vsnprintf(pathbuf + prefixlen, + sizeof(pathbuf) - prefixlen, path, ap); + else + vsnprintf(pathbuf, sizeof(pathbuf), path, ap); + return pathbuf; +} + +char * +path_strdup(const char *path, ...) +{ + const char *p; + va_list ap; + + va_start(ap, path); + p = path_vcreate(path, ap); + va_end(ap); + + return p ? strdup(p) : NULL; +} + +static FILE * +path_vfopen(const char *mode, int exit_on_error, const char *path, va_list ap) +{ + FILE *f; + const char *p = path_vcreate(path, ap); + + f = fopen(p, mode); + if (!f && exit_on_error) + err(EXIT_FAILURE, _("cannot open %s"), p); + return f; +} + +static int +path_vopen(int flags, const char *path, va_list ap) +{ + int fd; + const char *p = path_vcreate(path, ap); + + fd = open(p, flags); + if (fd == -1) + err(EXIT_FAILURE, _("cannot open %s"), p); + return fd; +} + +FILE * +path_fopen(const char *mode, int exit_on_error, const char *path, ...) +{ + FILE *fd; + va_list ap; + + va_start(ap, path); + fd = path_vfopen(mode, exit_on_error, path, ap); + va_end(ap); + + return fd; +} + +void +path_read_str(char *result, size_t len, const char *path, ...) +{ + FILE *fd; + va_list ap; + + va_start(ap, path); + fd = path_vfopen("r", 1, path, ap); + va_end(ap); + + if (!fgets(result, len, fd)) + err(EXIT_FAILURE, _("cannot read %s"), pathbuf); + fclose(fd); + + len = strlen(result); + if (result[len - 1] == '\n') + result[len - 1] = '\0'; +} + +int +path_read_s32(const char *path, ...) +{ + FILE *fd; + va_list ap; + int result; + + va_start(ap, path); + fd = path_vfopen("r", 1, path, ap); + va_end(ap); + + if (fscanf(fd, "%d", &result) != 1) { + if (ferror(fd)) + err(EXIT_FAILURE, _("cannot read %s"), pathbuf); + else + errx(EXIT_FAILURE, _("parse error: %s"), pathbuf); + } + fclose(fd); + return result; +} + +uint64_t +path_read_u64(const char *path, ...) +{ + FILE *fd; + va_list ap; + uint64_t result; + + va_start(ap, path); + fd = path_vfopen("r", 1, path, ap); + va_end(ap); + + if (fscanf(fd, "%"SCNu64, &result) != 1) { + if (ferror(fd)) + err(EXIT_FAILURE, _("cannot read %s"), pathbuf); + else + errx(EXIT_FAILURE, _("parse error: %s"), pathbuf); + } + fclose(fd); + return result; +} + +int +path_write_str(const char *str, const char *path, ...) +{ + int fd, result; + va_list ap; + + va_start(ap, path); + fd = path_vopen(O_WRONLY|O_CLOEXEC, path, ap); + va_end(ap); + result = write_all(fd, str, strlen(str)); + close(fd); + return result; +} + +int +path_exist(const char *path, ...) +{ + va_list ap; + const char *p; + + va_start(ap, path); + p = path_vcreate(path, ap); + va_end(ap); + + return access(p, F_OK) == 0; +} + +#ifdef HAVE_CPU_SET_T + +static cpu_set_t * +path_cpuparse(int maxcpus, int islist, const char *path, va_list ap) +{ + FILE *fd; + cpu_set_t *set; + size_t setsize, len = maxcpus * 7; + char buf[len]; + + fd = path_vfopen("r", 1, path, ap); + + if (!fgets(buf, len, fd)) + err(EXIT_FAILURE, _("cannot read %s"), pathbuf); + fclose(fd); + + len = strlen(buf); + if (buf[len - 1] == '\n') + buf[len - 1] = '\0'; + + set = cpuset_alloc(maxcpus, &setsize, NULL); + if (!set) + err(EXIT_FAILURE, _("failed to callocate cpu set")); + + if (islist) { + if (cpulist_parse(buf, set, setsize, 0)) + errx(EXIT_FAILURE, _("failed to parse CPU list %s"), buf); + } else { + if (cpumask_parse(buf, set, setsize)) + errx(EXIT_FAILURE, _("failed to parse CPU mask %s"), buf); + } + return set; +} + +cpu_set_t * +path_read_cpuset(int maxcpus, const char *path, ...) +{ + va_list ap; + cpu_set_t *set; + + va_start(ap, path); + set = path_cpuparse(maxcpus, 0, path, ap); + va_end(ap); + + return set; +} + +cpu_set_t * +path_read_cpulist(int maxcpus, const char *path, ...) +{ + va_list ap; + cpu_set_t *set; + + va_start(ap, path); + set = path_cpuparse(maxcpus, 1, path, ap); + va_end(ap); + + return set; +} + +#endif /* HAVE_CPU_SET_T */ + +void +path_set_prefix(const char *prefix) +{ + prefixlen = strlen(prefix); + strncpy(pathbuf, prefix, sizeof(pathbuf)); + pathbuf[sizeof(pathbuf) - 1] = '\0'; +} diff --git a/libblkid/lib/procutils.c b/libblkid/lib/procutils.c new file mode 100644 index 000000000..ef969417d --- /dev/null +++ b/libblkid/lib/procutils.c @@ -0,0 +1,264 @@ +/* + * Copyright (C) 2011 Davidlohr Bueso <dave@gnu.org> + * + * procutils.c: General purpose procfs parsing utilities + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Library Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Library Public License for more details. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <sys/types.h> +#include <dirent.h> +#include <ctype.h> + +#include "procutils.h" +#include "at.h" +#include "c.h" + +/* + * @pid: process ID for which we want to obtain the threads group + * + * Returns: newly allocated tasks structure + */ +struct proc_tasks *proc_open_tasks(pid_t pid) +{ + struct proc_tasks *tasks; + char path[PATH_MAX]; + + sprintf(path, "/proc/%d/task/", pid); + + tasks = malloc(sizeof(struct proc_tasks)); + if (tasks) { + tasks->dir = opendir(path); + if (tasks->dir) + return tasks; + } + + free(tasks); + return NULL; +} + +/* + * @tasks: allocated tasks structure + * + * Returns: nothing + */ +void proc_close_tasks(struct proc_tasks *tasks) +{ + if (tasks && tasks->dir) + closedir(tasks->dir); + free(tasks); +} + +/* + * @tasks: allocated task structure + * @tid: [output] one of the thread IDs belonging to the thread group + * If when an error occurs, it is set to 0. + * + * Returns: 0 on success, 1 on end, -1 on failure or no more threads + */ +int proc_next_tid(struct proc_tasks *tasks, pid_t *tid) +{ + struct dirent *d; + char *end; + + if (!tasks || !tid) + return -EINVAL; + + *tid = 0; + errno = 0; + + do { + d = readdir(tasks->dir); + if (!d) + return errno ? -1 : 1; /* error or end-of-dir */ + + if (!isdigit((unsigned char) *d->d_name)) + continue; + errno = 0; + *tid = (pid_t) strtol(d->d_name, &end, 10); + if (errno || d->d_name == end || (end && *end)) + return -1; + + } while (!*tid); + + return 0; +} + +struct proc_processes *proc_open_processes(void) +{ + struct proc_processes *ps; + + ps = calloc(1, sizeof(struct proc_processes)); + if (ps) { + ps->dir = opendir("/proc"); + if (ps->dir) + return ps; + } + + free(ps); + return NULL; +} + +void proc_close_processes(struct proc_processes *ps) +{ + if (ps && ps->dir) + closedir(ps->dir); + free(ps); +} + +void proc_processes_filter_by_name(struct proc_processes *ps, const char *name) +{ + ps->fltr_name = name; + ps->has_fltr_name = name ? 1 : 0; +} + +void proc_processes_filter_by_uid(struct proc_processes *ps, uid_t uid) +{ + ps->fltr_uid = uid; + ps->has_fltr_uid = 1; +} + +int proc_next_pid(struct proc_processes *ps, pid_t *pid) +{ + struct dirent *d; + + if (!ps || !pid) + return -EINVAL; + + *pid = 0; + errno = 0; + + do { + char buf[BUFSIZ], *p; + + d = readdir(ps->dir); + if (!d) + return errno ? -1 : 1; /* error or end-of-dir */ + + + if (!isdigit((unsigned char) *d->d_name)) + continue; + + /* filter out by UID */ + if (ps->has_fltr_uid) { + struct stat st; + + if (fstat_at(dirfd(ps->dir), "/proc", d->d_name, &st, 0)) + continue; + if (ps->fltr_uid != st.st_uid) + continue; + } + + /* filter out by NAME */ + if (ps->has_fltr_name) { + char procname[256]; + FILE *f; + + snprintf(buf, sizeof(buf), "%s/stat", d->d_name); + f = fopen_at(dirfd(ps->dir), "/proc", buf, + O_CLOEXEC|O_RDONLY, "r"); + if (!f) + continue; + + p = fgets(buf, sizeof(buf), f); + fclose(f); + if (!p) + continue; + + if (sscanf(buf, "%*d (%255[^)])", procname) != 1) + continue; + + /* ok, we got the process name. */ + if (strcmp(procname, ps->fltr_name) != 0) + continue; + } + + p = NULL; + errno = 0; + *pid = (pid_t) strtol(d->d_name, &p, 10); + if (errno || d->d_name == p || (p && *p)) + return errno ? -errno : -1; + + return 0; + } while (1); + + return 0; +} + +#ifdef TEST_PROGRAM + +static int test_tasks(int argc, char *argv[]) +{ + pid_t tid, pid; + struct proc_tasks *ts; + + if (argc != 2) + return EXIT_FAILURE; + + pid = strtol(argv[1], (char **) NULL, 10); + printf("PID=%d, TIDs:", pid); + + ts = proc_open_tasks(pid); + if (!ts) + err(EXIT_FAILURE, "open list of tasks failed"); + + while (proc_next_tid(ts, &tid) == 0) + printf(" %d", tid); + + printf("\n"); + proc_close_tasks(ts); + return EXIT_SUCCESS; +} + +static int test_processes(int argc, char *argv[]) +{ + pid_t pid; + struct proc_processes *ps; + + ps = proc_open_processes(); + if (!ps) + err(EXIT_FAILURE, "open list of processes failed"); + + if (argc >= 3 && strcmp(argv[1], "--name") == 0) + proc_processes_filter_by_name(ps, argv[2]); + + if (argc >= 3 && strcmp(argv[1], "--uid") == 0) + proc_processes_filter_by_uid(ps, (uid_t) atol(argv[2])); + + while (proc_next_pid(ps, &pid) == 0) + printf(" %d", pid); + + printf("\n"); + proc_close_processes(ps); + return EXIT_SUCCESS; +} + +int main(int argc, char *argv[]) +{ + if (argc < 2) { + fprintf(stderr, "usage: %1$s --tasks <pid>\n" + " %1$s --processes [---name <name>] [--uid <uid>]\n", + program_invocation_short_name); + return EXIT_FAILURE; + } + + if (strcmp(argv[1], "--tasks") == 0) + return test_tasks(argc - 1, argv + 1); + if (strcmp(argv[1], "--processes") == 0) + return test_processes(argc - 1, argv + 1); + + return EXIT_FAILURE; +} +#endif /* TEST_PROGRAM */ diff --git a/libblkid/lib/randutils.c b/libblkid/lib/randutils.c new file mode 100644 index 000000000..684ac0ac1 --- /dev/null +++ b/libblkid/lib/randutils.c @@ -0,0 +1,147 @@ +/* + * General purpose random utilities + * + * Based on libuuid code. + * + * This file may be redistributed under the terms of the + * GNU Lesser General Public License. + */ +#include <stdio.h> +#include <unistd.h> +#include <fcntl.h> +#include <stdlib.h> +#include <string.h> +#include <sys/time.h> + +#include <sys/syscall.h> + +#include "c.h" +#include "randutils.h" +#include "nls.h" + +#ifdef HAVE_TLS +#define THREAD_LOCAL static __thread +#else +#define THREAD_LOCAL static +#endif + +#if defined(__linux__) && defined(__NR_gettid) && defined(HAVE_JRAND48) +#define DO_JRAND_MIX +THREAD_LOCAL unsigned short ul_jrand_seed[3]; +#endif + +int random_get_fd(void) +{ + int i, fd; + struct timeval tv; + + gettimeofday(&tv, 0); + fd = open("/dev/urandom", O_RDONLY | O_CLOEXEC); + if (fd == -1) + fd = open("/dev/random", O_RDONLY | O_NONBLOCK | O_CLOEXEC); + if (fd >= 0) { + i = fcntl(fd, F_GETFD); + if (i >= 0) + fcntl(fd, F_SETFD, i | FD_CLOEXEC); + } + srand((getpid() << 16) ^ getuid() ^ tv.tv_sec ^ tv.tv_usec); + +#ifdef DO_JRAND_MIX + ul_jrand_seed[0] = getpid() ^ (tv.tv_sec & 0xFFFF); + ul_jrand_seed[1] = getppid() ^ (tv.tv_usec & 0xFFFF); + ul_jrand_seed[2] = (tv.tv_sec ^ tv.tv_usec) >> 16; +#endif + /* Crank the random number generator a few times */ + gettimeofday(&tv, 0); + for (i = (tv.tv_sec ^ tv.tv_usec) & 0x1F; i > 0; i--) + rand(); + return fd; +} + + +/* + * Generate a stream of random nbytes into buf. + * Use /dev/urandom if possible, and if not, + * use glibc pseudo-random functions. + */ +void random_get_bytes(void *buf, size_t nbytes) +{ + size_t i, n = nbytes; + int fd = random_get_fd(); + int lose_counter = 0; + unsigned char *cp = (unsigned char *) buf; + + if (fd >= 0) { + while (n > 0) { + ssize_t x = read(fd, cp, n); + if (x <= 0) { + if (lose_counter++ > 16) + break; + continue; + } + n -= x; + cp += x; + lose_counter = 0; + } + + close(fd); + } + + /* + * We do this all the time, but this is the only source of + * randomness if /dev/random/urandom is out to lunch. + */ + for (cp = buf, i = 0; i < nbytes; i++) + *cp++ ^= (rand() >> 7) & 0xFF; + +#ifdef DO_JRAND_MIX + { + unsigned short tmp_seed[3]; + + memcpy(tmp_seed, ul_jrand_seed, sizeof(tmp_seed)); + ul_jrand_seed[2] = ul_jrand_seed[2] ^ syscall(__NR_gettid); + for (cp = buf, i = 0; i < nbytes; i++) + *cp++ ^= (jrand48(tmp_seed) >> 7) & 0xFF; + memcpy(ul_jrand_seed, tmp_seed, + sizeof(ul_jrand_seed)-sizeof(unsigned short)); + } +#endif + + return; +} + + +/* + * Tell source of randomness. + */ +const char *random_tell_source(void) +{ + size_t i; + static const char *random_sources[] = { + "/dev/urandom", + "/dev/random" + }; + + for (i = 0; i < ARRAY_SIZE(random_sources); i++) { + if (!access(random_sources[i], R_OK)) + return random_sources[i]; + } + + return _("libc pseudo-random functions"); +} + +#ifdef TEST_PROGRAM +int main(int argc __attribute__ ((__unused__)), + char *argv[] __attribute__ ((__unused__))) +{ + unsigned int v, i; + + /* generate and print 10 random numbers */ + for (i = 0; i < 10; i++) { + random_get_bytes(&v, sizeof(v)); + printf("%d\n", v); + } + + return EXIT_SUCCESS; +} +#endif /* TEST_PROGRAM */ diff --git a/libblkid/lib/readutmp.c b/libblkid/lib/readutmp.c new file mode 100644 index 000000000..b11e9a4d2 --- /dev/null +++ b/libblkid/lib/readutmp.c @@ -0,0 +1,78 @@ +/* GNU's read utmp module. + + Copyright (C) 1992-2001, 2003-2006, 2009-2014 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +/* Written by jla; revised by djm */ +/* extracted for util-linux by ooprala */ + +#include <errno.h> +#include <stdio.h> + +#include <sys/types.h> +#include <sys/stat.h> +#include <signal.h> +#include <stdbool.h> +#include <string.h> +#include <stdlib.h> +#include <stdint.h> + +#include "xalloc.h" +#include "readutmp.h" + +/* Read the utmp entries corresponding to file FILE into freshly- + malloc'd storage, set *UTMP_BUF to that pointer, set *N_ENTRIES to + the number of entries, and return zero. If there is any error, + return -1, setting errno, and don't modify the parameters. + If OPTIONS & READ_UTMP_CHECK_PIDS is nonzero, omit entries whose + process-IDs do not currently exist. */ +int +read_utmp (char const *file, size_t *n_entries, struct utmp **utmp_buf) +{ + size_t n_read = 0; + size_t n_alloc = 0; + struct utmp *utmp = NULL; + struct utmp *u; + + /* Ignore the return value for now. + Solaris' utmpname returns 1 upon success -- which is contrary + to what the GNU libc version does. In addition, older GNU libc + versions are actually void. */ + utmpname(file); + + setutent(); + + errno = 0; + while ((u = getutent()) != NULL) { + if (n_read == n_alloc) { + n_alloc += 32; + utmp = xrealloc(utmp, n_alloc * sizeof (struct utmp)); + if (!utmp) + return -1; + } + utmp[n_read++] = *u; + } + if (!u && errno) { + free(utmp); + return -1; + } + + endutent(); + + *n_entries = n_read; + *utmp_buf = utmp; + + return 0; +} diff --git a/libblkid/lib/setproctitle.c b/libblkid/lib/setproctitle.c new file mode 100644 index 000000000..4bcf8c8a9 --- /dev/null +++ b/libblkid/lib/setproctitle.c @@ -0,0 +1,74 @@ +/* + * set process title for ps (from sendmail) + * + * Clobbers argv of our main procedure so ps(1) will display the title. + */ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <stdarg.h> + +#include "setproctitle.h" + +#ifndef SPT_BUFSIZE +# define SPT_BUFSIZE 2048 +#endif + +extern char **environ; + +static char **argv0; +static int argv_lth; + +void initproctitle (int argc, char **argv) +{ + int i; + char **envp = environ; + + /* + * Move the environment so we can reuse the memory. + * (Code borrowed from sendmail.) + * WARNING: ugly assumptions on memory layout here; + * if this ever causes problems, #undef DO_PS_FIDDLING + */ + for (i = 0; envp[i] != NULL; i++) + continue; + + environ = (char **) malloc(sizeof(char *) * (i + 1)); + if (environ == NULL) + return; + + for (i = 0; envp[i] != NULL; i++) + if ((environ[i] = strdup(envp[i])) == NULL) + return; + environ[i] = NULL; + + argv0 = argv; + if (i > 0) + argv_lth = envp[i-1] + strlen(envp[i-1]) - argv0[0]; + else + argv_lth = argv0[argc-1] + strlen(argv0[argc-1]) - argv0[0]; +} + +void setproctitle (const char *prog, const char *txt) +{ + int i; + char buf[SPT_BUFSIZE]; + + if (!argv0) + return; + + if (strlen(prog) + strlen(txt) + 5 > SPT_BUFSIZE) + return; + + sprintf(buf, "%s -- %s", prog, txt); + + i = strlen(buf); + if (i > argv_lth - 2) { + i = argv_lth - 2; + buf[i] = '\0'; + } + memset(argv0[0], '\0', argv_lth); /* clear the memory area */ + strcpy(argv0[0], buf); + + argv0[1] = NULL; +} diff --git a/libblkid/lib/strutils.c b/libblkid/lib/strutils.c new file mode 100644 index 000000000..9fe9481bc --- /dev/null +++ b/libblkid/lib/strutils.c @@ -0,0 +1,763 @@ +/* + * Copyright (C) 2010 Karel Zak <kzak@redhat.com> + * Copyright (C) 2010 Davidlohr Bueso <dave@gnu.org> + */ + +#include <stdio.h> +#include <stdlib.h> +#include <inttypes.h> +#include <ctype.h> +#include <errno.h> +#include <sys/stat.h> +#include <string.h> +#include <assert.h> + +#include "c.h" +#include "nls.h" +#include "strutils.h" +#include "bitops.h" + +static int do_scale_by_power (uintmax_t *x, int base, int power) +{ + while (power--) { + if (UINTMAX_MAX / base < *x) + return -ERANGE; + *x *= base; + } + return 0; +} + +/* + * strtosize() - convert string to size (uintmax_t). + * + * Supported suffixes: + * + * XiB or X for 2^N + * where X = {K,M,G,T,P,E,Z,Y} + * or X = {k,m,g,t,p,e} (undocumented for backward compatibility only) + * for example: + * 10KiB = 10240 + * 10K = 10240 + * + * XB for 10^N + * where X = {K,M,G,T,P,E,Z,Y} + * for example: + * 10KB = 10000 + * + * The optinal 'power' variable returns number associated with used suffix + * {K,M,G,T,P,E,Z,Y} = {1,2,3,4,5,6,7,8}. + * + * The function also supports decimal point, for example: + * 0.5MB = 500000 + * 0.5MiB = 512000 + * + * Note that the function does not accept numbers with '-' (negative sign) + * prefix. + */ +int parse_size(const char *str, uintmax_t *res, int *power) +{ + char *p; + uintmax_t x, frac = 0; + int base = 1024, rc = 0, pwr = 0, frac_zeros = 0; + + static const char *suf = "KMGTPEYZ"; + static const char *suf2 = "kmgtpeyz"; + const char *sp; + + *res = 0; + + if (!str || !*str) { + rc = -EINVAL; + goto err; + } + + /* Only positive numbers are acceptable + * + * Note that this check is not perfect, it would be better to + * use lconv->negative_sign. But coreutils use the same solution, + * so it's probably good enough... + */ + p = (char *) str; + while (isspace((unsigned char) *p)) + p++; + if (*p == '-') { + rc = -EINVAL; + goto err; + } + p = NULL; + + errno = 0; + x = strtoumax(str, &p, 0); + + if (p == str || + (errno != 0 && (x == UINTMAX_MAX || x == 0))) { + rc = errno ? -errno : -1; + goto err; + } + if (!p || !*p) + goto done; /* without suffix */ + + /* + * Check size suffixes + */ +check_suffix: + if (*(p + 1) == 'i' && *(p + 2) == 'B' && !*(p + 3)) + base = 1024; /* XiB, 2^N */ + else if (*(p + 1) == 'B' && !*(p + 2)) + base = 1000; /* XB, 10^N */ + else if (*(p + 1)) { + struct lconv const *l = localeconv(); + char *dp = l ? l->decimal_point : NULL; + size_t dpsz = dp ? strlen(dp) : 0; + + if (frac == 0 && *p && dp && strncmp(dp, p, dpsz) == 0) { + char *fstr = p + dpsz; + + for (p = fstr; *p && *p == '0'; p++) + frac_zeros++; + errno = 0, p = NULL; + frac = strtoumax(fstr, &p, 0); + if (p == fstr || + (errno != 0 && (frac == UINTMAX_MAX || frac == 0))) { + rc = errno ? -errno : -1; + goto err; + } + if (frac && (!p || !*p)) { + rc = -EINVAL; + goto err; /* without suffix, but with frac */ + } + goto check_suffix; + } + rc = -EINVAL; + goto err; /* unexpected suffix */ + } + + sp = strchr(suf, *p); + if (sp) + pwr = (sp - suf) + 1; + else { + sp = strchr(suf2, *p); + if (sp) + pwr = (sp - suf2) + 1; + else { + rc = -EINVAL; + goto err; + } + } + + rc = do_scale_by_power(&x, base, pwr); + if (power) + *power = pwr; + if (frac && pwr) { + int zeros_in_pwr = frac_zeros % 3; + int frac_pwr = pwr - (frac_zeros / 3) - 1; + uintmax_t y = frac * (zeros_in_pwr == 0 ? 100 : + zeros_in_pwr == 1 ? 10 : 1); + + if (frac_pwr < 0) { + rc = -EINVAL; + goto err; + } + do_scale_by_power(&y, base, frac_pwr); + x += y; + } +done: + *res = x; +err: + return rc; +} + +int strtosize(const char *str, uintmax_t *res) +{ + return parse_size(str, res, NULL); +} + +int isdigit_string(const char *str) +{ + const char *p; + + for (p = str; p && *p && isdigit((unsigned char) *p); p++); + + return p && p > str && !*p; +} + + +#ifndef HAVE_MEMPCPY +void *mempcpy(void *restrict dest, const void *restrict src, size_t n) +{ + return ((char *)memcpy(dest, src, n)) + n; +} +#endif + +#ifndef HAVE_STRNLEN +size_t strnlen(const char *s, size_t maxlen) +{ + int i; + + for (i = 0; i < maxlen; i++) { + if (s[i] == '\0') + return i + 1; + } + return maxlen; +} +#endif + +#ifndef HAVE_STRNCHR +char *strnchr(const char *s, size_t maxlen, int c) +{ + for (; maxlen-- && *s != '\0'; ++s) + if (*s == (char)c) + return (char *)s; + return NULL; +} +#endif + +#ifndef HAVE_STRNDUP +char *strndup(const char *s, size_t n) +{ + size_t len = strnlen(s, n); + char *new = (char *) malloc((len + 1) * sizeof(char)); + if (!new) + return NULL; + new[len] = '\0'; + return (char *) memcpy(new, s, len); +} +#endif + +int16_t strtos16_or_err(const char *str, const char *errmesg) +{ + int32_t num = strtos32_or_err(str, errmesg); + + if (num < INT16_MIN || num > INT16_MAX) + errx(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str); + + return num; +} + +uint16_t strtou16_or_err(const char *str, const char *errmesg) +{ + uint32_t num = strtou32_or_err(str, errmesg); + + if (num > UINT16_MAX) + errx(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str); + + return num; +} + +int32_t strtos32_or_err(const char *str, const char *errmesg) +{ + int64_t num = strtos64_or_err(str, errmesg); + + if (num < INT32_MIN || num > INT32_MAX) + errx(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str); + + return num; +} + +uint32_t strtou32_or_err(const char *str, const char *errmesg) +{ + uint64_t num = strtou64_or_err(str, errmesg); + + if (num > UINT32_MAX) + errx(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str); + + return num; +} + +int64_t strtos64_or_err(const char *str, const char *errmesg) +{ + int64_t num; + char *end = NULL; + + if (str == NULL || *str == '\0') + goto err; + errno = 0; + num = strtoimax(str, &end, 10); + + if (errno || str == end || (end && *end)) + goto err; + + return num; +err: + if (errno) + err(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str); + + errx(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str); +} + +uint64_t strtou64_or_err(const char *str, const char *errmesg) +{ + uintmax_t num; + char *end = NULL; + + if (str == NULL || *str == '\0') + goto err; + errno = 0; + num = strtoumax(str, &end, 10); + + if (errno || str == end || (end && *end)) + goto err; + + return num; +err: + if (errno) + err(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str); + + errx(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str); +} + + +double strtod_or_err(const char *str, const char *errmesg) +{ + double num; + char *end = NULL; + + if (str == NULL || *str == '\0') + goto err; + errno = 0; + num = strtod(str, &end); + + if (errno || str == end || (end && *end)) + goto err; + + return num; +err: + if (errno) + err(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str); + + errx(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str); +} + +long strtol_or_err(const char *str, const char *errmesg) +{ + long num; + char *end = NULL; + + if (str == NULL || *str == '\0') + goto err; + errno = 0; + num = strtol(str, &end, 10); + + if (errno || str == end || (end && *end)) + goto err; + + return num; +err: + if (errno) + err(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str); + errx(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str); +} + +unsigned long strtoul_or_err(const char *str, const char *errmesg) +{ + unsigned long num; + char *end = NULL; + + if (str == NULL || *str == '\0') + goto err; + errno = 0; + num = strtoul(str, &end, 10); + + if (errno || str == end || (end && *end)) + goto err; + + return num; +err: + if (errno) + err(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str); + + errx(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str); +} + +uintmax_t strtosize_or_err(const char *str, const char *errmesg) +{ + uintmax_t num; + + if (strtosize(str, &num) == 0) + return num; + + if (errno) + err(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str); + + errx(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str); +} + + +void strtotimeval_or_err(const char *str, struct timeval *tv, const char *errmesg) +{ + double user_input; + + user_input = strtod_or_err(str, errmesg); + tv->tv_sec = (time_t) user_input; + tv->tv_usec = (long)((user_input - tv->tv_sec) * 1000000); +} + +/* + * Converts stat->st_mode to ls(1)-like mode string. The size of "str" must + * be 11 bytes. + */ +void strmode(mode_t mode, char *str) +{ + if (S_ISDIR(mode)) + str[0] = 'd'; + else if (S_ISLNK(mode)) + str[0] = 'l'; + else if (S_ISCHR(mode)) + str[0] = 'c'; + else if (S_ISBLK(mode)) + str[0] = 'b'; + else if (S_ISSOCK(mode)) + str[0] = 's'; + else if (S_ISFIFO(mode)) + str[0] = 'p'; + else if (S_ISREG(mode)) + str[0] = '-'; + + str[1] = mode & S_IRUSR ? 'r' : '-'; + str[2] = mode & S_IWUSR ? 'w' : '-'; + str[3] = (mode & S_ISUID + ? (mode & S_IXUSR ? 's' : 'S') + : (mode & S_IXUSR ? 'x' : '-')); + str[4] = mode & S_IRGRP ? 'r' : '-'; + str[5] = mode & S_IWGRP ? 'w' : '-'; + str[6] = (mode & S_ISGID + ? (mode & S_IXGRP ? 's' : 'S') + : (mode & S_IXGRP ? 'x' : '-')); + str[7] = mode & S_IROTH ? 'r' : '-'; + str[8] = mode & S_IWOTH ? 'w' : '-'; + str[9] = (mode & S_ISVTX + ? (mode & S_IXOTH ? 't' : 'T') + : (mode & S_IXOTH ? 'x' : '-')); + str[10] = '\0'; +} + +/* + * returns exponent (2^x=n) in range KiB..PiB + */ +static int get_exp(uint64_t n) +{ + int shft; + + for (shft = 10; shft <= 60; shft += 10) { + if (n < (1ULL << shft)) + break; + } + return shft - 10; +} + +char *size_to_human_string(int options, uint64_t bytes) +{ + char buf[32]; + int dec, exp; + uint64_t frac; + const char *letters = "BKMGTPE"; + char suffix[sizeof(" KiB")], *psuf = suffix; + char c; + + if (options & SIZE_SUFFIX_SPACE) + *psuf++ = ' '; + + exp = get_exp(bytes); + c = *(letters + (exp ? exp / 10 : 0)); + dec = exp ? bytes / (1ULL << exp) : bytes; + frac = exp ? bytes % (1ULL << exp) : 0; + + *psuf++ = c; + + if ((options & SIZE_SUFFIX_3LETTER) && (c != 'B')) { + *psuf++ = 'i'; + *psuf++ = 'B'; + } + + *psuf = '\0'; + + /* fprintf(stderr, "exp: %d, unit: %c, dec: %d, frac: %jd\n", + * exp, suffix[0], dec, frac); + */ + + if (frac) { + /* round */ + frac = (frac / (1ULL << (exp - 10)) + 50) / 100; + if (frac == 10) + dec++, frac = 0; + } + + if (frac) { + struct lconv const *l = localeconv(); + char *dp = l ? l->decimal_point : NULL; + + if (!dp || !*dp) + dp = "."; + snprintf(buf, sizeof(buf), "%d%s%jd%s", dec, dp, frac, suffix); + } else + snprintf(buf, sizeof(buf), "%d%s", dec, suffix); + + return strdup(buf); +} + +/* + * Parses comma delimited list to array with IDs, for example: + * + * "aaa,bbb,ccc" --> ary[0] = FOO_AAA; + * ary[1] = FOO_BBB; + * ary[3] = FOO_CCC; + * + * The function name2id() provides conversion from string to ID. + * + * Returns: >= 0 : number of items added to ary[] + * -1 : parse error or unknown item + * -2 : arysz reached + */ +int string_to_idarray(const char *list, int ary[], size_t arysz, + int (name2id)(const char *, size_t)) +{ + const char *begin = NULL, *p; + size_t n = 0; + + if (!list || !*list || !ary || !arysz || !name2id) + return -1; + + for (p = list; p && *p; p++) { + const char *end = NULL; + int id; + + if (n >= arysz) + return -2; + if (!begin) + begin = p; /* begin of the column name */ + if (*p == ',') + end = p; /* terminate the name */ + if (*(p + 1) == '\0') + end = p + 1; /* end of string */ + if (!begin || !end) + continue; + if (end <= begin) + return -1; + + id = name2id(begin, end - begin); + if (id == -1) + return -1; + ary[ n++ ] = id; + begin = NULL; + if (end && !*end) + break; + } + return n; +} + +/* + * Parses the array like string_to_idarray but if format is "+aaa,bbb" + * it adds fields to array instead of replacing them. + */ +int string_add_to_idarray(const char *list, int ary[], size_t arysz, + int *ary_pos, int (name2id)(const char *, size_t)) +{ + const char *list_add; + int r; + + if (!list || !*list || !ary_pos || + *ary_pos < 0 || (size_t) *ary_pos > arysz) + return -1; + + if (list[0] == '+') + list_add = &list[1]; + else { + list_add = list; + *ary_pos = 0; + } + + r = string_to_idarray(list_add, &ary[*ary_pos], arysz - *ary_pos, name2id); + if (r > 0) + *ary_pos += r; + return r; +} + +/* + * LIST ::= <item> [, <item>] + * + * The <item> is translated to 'id' by name2id() function and the 'id' is used + * as a position in the 'ary' bit array. It means that the 'id' has to be in + * range <0..N> where N < sizeof(ary) * NBBY. + * + * Returns: 0 on success, <0 on error. + */ +int string_to_bitarray(const char *list, + char *ary, + int (*name2bit)(const char *, size_t)) +{ + const char *begin = NULL, *p; + + if (!list || !name2bit || !ary) + return -EINVAL; + + for (p = list; p && *p; p++) { + const char *end = NULL; + int bit; + + if (!begin) + begin = p; /* begin of the level name */ + if (*p == ',') + end = p; /* terminate the name */ + if (*(p + 1) == '\0') + end = p + 1; /* end of string */ + if (!begin || !end) + continue; + if (end <= begin) + return -1; + + bit = name2bit(begin, end - begin); + if (bit < 0) + return bit; + setbit(ary, bit); + begin = NULL; + if (end && !*end) + break; + } + return 0; +} + +/* + * LIST ::= <item> [, <item>] + * + * The <item> is translated to 'id' by name2flag() function and the flags is + * set to the 'mask' +* + * Returns: 0 on success, <0 on error. + */ +int string_to_bitmask(const char *list, + unsigned long *mask, + long (*name2flag)(const char *, size_t)) +{ + const char *begin = NULL, *p; + + if (!list || !name2flag || !mask) + return -EINVAL; + + for (p = list; p && *p; p++) { + const char *end = NULL; + long flag; + + if (!begin) + begin = p; /* begin of the level name */ + if (*p == ',') + end = p; /* terminate the name */ + if (*(p + 1) == '\0') + end = p + 1; /* end of string */ + if (!begin || !end) + continue; + if (end <= begin) + return -1; + + flag = name2flag(begin, end - begin); + if (flag < 0) + return flag; /* error */ + *mask |= flag; + begin = NULL; + if (end && !*end) + break; + } + return 0; +} + +/* + * Parse the lower and higher values in a string containing + * "lower:higher" or "lower-higher" format. Note that either + * the lower or the higher values may be missing, and the def + * value will be assigned to it by default. + * + * Returns: 0 on success, <0 on error. + */ +int parse_range(const char *str, int *lower, int *upper, int def) +{ + char *end = NULL; + + if (!str) + return 0; + + *upper = *lower = def; + errno = 0; + + if (*str == ':') { /* <:N> */ + str++; + *upper = strtol(str, &end, 10); + if (errno || !end || *end || end == str) + return -1; + } else { + *upper = *lower = strtol(str, &end, 10); + if (errno || !end || end == str) + return -1; + + if (*end == ':' && !*(end + 1)) /* <M:> */ + *upper = 0; + else if (*end == '-' || *end == ':') { /* <M:N> <M-N> */ + str = end + 1; + end = NULL; + errno = 0; + *upper = strtol(str, &end, 10); + + if (errno || !end || *end || end == str) + return -1; + } + } + return 0; +} + +/* + * Compare two strings for equality, ignoring at most one trailing + * slash. + */ +int streq_except_trailing_slash(const char *s1, const char *s2) +{ + int equal; + + if (!s1 && !s2) + return 1; + if (!s1 || !s2) + return 0; + + equal = !strcmp(s1, s2); + + if (!equal) { + size_t len1 = strlen(s1); + size_t len2 = strlen(s2); + + if (len1 && *(s1 + len1 - 1) == '/') + len1--; + if (len2 && *(s2 + len2 - 1) == '/') + len2--; + if (len1 != len2) + return 0; + + equal = !strncmp(s1, s2, len1); + } + + return equal; +} + + +#ifdef TEST_PROGRAM + +int main(int argc, char *argv[]) +{ + uintmax_t size = 0; + char *hum, *hum2; + + if (argc < 2) { + fprintf(stderr, "usage: %s <number>[suffix]\n", argv[0]); + exit(EXIT_FAILURE); + } + + if (strtosize(argv[1], &size)) + errx(EXIT_FAILURE, "invalid size '%s' value", argv[1]); + + hum = size_to_human_string(SIZE_SUFFIX_1LETTER, size); + hum2 = size_to_human_string(SIZE_SUFFIX_3LETTER | + SIZE_SUFFIX_SPACE, size); + + printf("%25s : %20ju : %8s : %12s\n", argv[1], size, hum, hum2); + free(hum); + free(hum2); + + return EXIT_SUCCESS; +} +#endif /* TEST_PROGRAM */ diff --git a/libblkid/lib/swapprober.c b/libblkid/lib/swapprober.c new file mode 100644 index 000000000..5a4b112e1 --- /dev/null +++ b/libblkid/lib/swapprober.c @@ -0,0 +1,49 @@ + +#include "c.h" +#include "nls.h" + +#include "swapheader.h" +#include "swapprober.h" + +blkid_probe get_swap_prober(const char *devname) +{ + blkid_probe pr; + int rc; + const char *version = NULL; + char *swap_filter[] = { "swap", NULL }; + + pr = blkid_new_probe_from_filename(devname); + if (!pr) { + warn(_("%s: unable to probe device"), devname); + return NULL; + } + + blkid_probe_enable_superblocks(pr, TRUE); + blkid_probe_set_superblocks_flags(pr, + BLKID_SUBLKS_LABEL | BLKID_SUBLKS_UUID | + BLKID_SUBLKS_VERSION); + + blkid_probe_filter_superblocks_type(pr, BLKID_FLTR_ONLYIN, swap_filter); + + rc = blkid_do_safeprobe(pr); + if (rc == -1) + warn(_("%s: unable to probe device"), devname); + else if (rc == -2) + warnx(_("%s: ambiguous probing result; use wipefs(8)"), devname); + else if (rc == 1) + warnx(_("%s: not a valid swap partition"), devname); + + if (rc == 0) { + /* Only the SWAPSPACE2 is supported. */ + if (blkid_probe_lookup_value(pr, "VERSION", &version, NULL) == 0 + && version + && strcmp(version, stringify_value(SWAP_VERSION))) + warnx(_("%s: unsupported swap version '%s'"), + devname, version); + else + return pr; + } + + blkid_free_probe(pr); + return NULL; +} diff --git a/libblkid/lib/sysfs.c b/libblkid/lib/sysfs.c new file mode 100644 index 000000000..63a90dcbc --- /dev/null +++ b/libblkid/lib/sysfs.c @@ -0,0 +1,1069 @@ +/* + * No copyright is claimed. This code is in the public domain; do with + * it what you wish. + * + * Written by Karel Zak <kzak@redhat.com> + */ +#include <ctype.h> + +#include "c.h" +#include "at.h" +#include "pathnames.h" +#include "sysfs.h" +#include "fileutils.h" +#include "all-io.h" + +char *sysfs_devno_attribute_path(dev_t devno, char *buf, + size_t bufsiz, const char *attr) +{ + int len; + + if (attr) + len = snprintf(buf, bufsiz, _PATH_SYS_DEVBLOCK "/%d:%d/%s", + major(devno), minor(devno), attr); + else + len = snprintf(buf, bufsiz, _PATH_SYS_DEVBLOCK "/%d:%d", + major(devno), minor(devno)); + + return (len < 0 || (size_t) len + 1 > bufsiz) ? NULL : buf; +} + +int sysfs_devno_has_attribute(dev_t devno, const char *attr) +{ + char path[PATH_MAX]; + struct stat info; + + if (!sysfs_devno_attribute_path(devno, path, sizeof(path), attr)) + return 0; + if (stat(path, &info) == 0) + return 1; + return 0; +} + +char *sysfs_devno_path(dev_t devno, char *buf, size_t bufsiz) +{ + return sysfs_devno_attribute_path(devno, buf, bufsiz, NULL); +} + +dev_t sysfs_devname_to_devno(const char *name, const char *parent) +{ + char buf[PATH_MAX], *path = NULL; + dev_t dev = 0; + + if (strncmp("/dev/", name, 5) == 0) { + /* + * Read from /dev + */ + struct stat st; + + if (stat(name, &st) == 0) + dev = st.st_rdev; + else + name += 5; /* unaccesible, or not node in /dev */ + } + + if (!dev && parent && strncmp("dm-", name, 3)) { + /* + * Create path to /sys/block/<parent>/<name>/dev + */ + int len = snprintf(buf, sizeof(buf), + _PATH_SYS_BLOCK "/%s/%s/dev", parent, name); + if (len < 0 || (size_t) len + 1 > sizeof(buf)) + return 0; + path = buf; + + } else if (!dev) { + /* + * Create path to /sys/block/<name>/dev + */ + int len = snprintf(buf, sizeof(buf), + _PATH_SYS_BLOCK "/%s/dev", name); + if (len < 0 || (size_t) len + 1 > sizeof(buf)) + return 0; + path = buf; + } + + if (path) { + /* + * read devno from sysfs + */ + FILE *f; + int maj = 0, min = 0; + + f = fopen(path, "r" UL_CLOEXECSTR); + if (!f) + return 0; + + if (fscanf(f, "%d:%d", &maj, &min) == 2) + dev = makedev(maj, min); + fclose(f); + } + return dev; +} + +/* + * Returns devname (e.g. "/dev/sda1") for the given devno. + * + * Note that the @buf has to be large enough to store /sys/dev/block/<maj:min> + * symlinks. + * + * Please, use more robust blkid_devno_to_devname() in your applications. + */ +char *sysfs_devno_to_devpath(dev_t devno, char *buf, size_t bufsiz) +{ + struct sysfs_cxt cxt; + char *name; + size_t sz; + struct stat st; + + if (sysfs_init(&cxt, devno, NULL)) + return NULL; + + name = sysfs_get_devname(&cxt, buf, bufsiz); + sysfs_deinit(&cxt); + + if (!name) + return NULL; + + sz = strlen(name); + + if (sz + sizeof("/dev/") > bufsiz) + return NULL; + + /* create the final "/dev/<name>" string */ + memmove(buf + 5, name, sz + 1); + memcpy(buf, "/dev/", 5); + + if (!stat(buf, &st) && S_ISBLK(st.st_mode) && st.st_rdev == devno) + return buf; + + return NULL; +} + +int sysfs_init(struct sysfs_cxt *cxt, dev_t devno, struct sysfs_cxt *parent) +{ + char path[PATH_MAX]; + int fd, rc; + + memset(cxt, 0, sizeof(*cxt)); + cxt->dir_fd = -1; + + if (!sysfs_devno_path(devno, path, sizeof(path))) + goto err; + + fd = open(path, O_RDONLY|O_CLOEXEC); + if (fd < 0) + goto err; + cxt->dir_fd = fd; + + cxt->dir_path = strdup(path); + if (!cxt->dir_path) + goto err; + cxt->devno = devno; + cxt->parent = parent; + return 0; +err: + rc = errno > 0 ? -errno : -1; + sysfs_deinit(cxt); + return rc; +} + +void sysfs_deinit(struct sysfs_cxt *cxt) +{ + if (!cxt) + return; + + if (cxt->dir_fd >= 0) + close(cxt->dir_fd); + free(cxt->dir_path); + + memset(cxt, 0, sizeof(*cxt)); + + cxt->dir_fd = -1; +} + +int sysfs_stat(struct sysfs_cxt *cxt, const char *attr, struct stat *st) +{ + int rc = fstat_at(cxt->dir_fd, cxt->dir_path, attr, st, 0); + + if (rc != 0 && errno == ENOENT && + strncmp(attr, "queue/", 6) == 0 && cxt->parent) { + + /* Exception for "queue/<attr>". These attributes are available + * for parental devices only + */ + return fstat_at(cxt->parent->dir_fd, + cxt->parent->dir_path, attr, st, 0); + } + return rc; +} + +int sysfs_has_attribute(struct sysfs_cxt *cxt, const char *attr) +{ + struct stat st; + + return sysfs_stat(cxt, attr, &st) == 0; +} + +static int sysfs_open(struct sysfs_cxt *cxt, const char *attr, int flags) +{ + int fd = open_at(cxt->dir_fd, cxt->dir_path, attr, flags); + + if (fd == -1 && errno == ENOENT && + strncmp(attr, "queue/", 6) == 0 && cxt->parent) { + + /* Exception for "queue/<attr>". These attributes are available + * for parental devices only + */ + fd = open_at(cxt->parent->dir_fd, cxt->dir_path, attr, flags); + } + return fd; +} + +ssize_t sysfs_readlink(struct sysfs_cxt *cxt, const char *attr, + char *buf, size_t bufsiz) +{ + if (!cxt->dir_path) + return -1; + + if (attr) + return readlink_at(cxt->dir_fd, cxt->dir_path, attr, buf, bufsiz); + + /* read /sys/dev/block/<maj:min> link */ + return readlink(cxt->dir_path, buf, bufsiz); +} + +DIR *sysfs_opendir(struct sysfs_cxt *cxt, const char *attr) +{ + DIR *dir; + int fd = -1; + + if (attr) + fd = sysfs_open(cxt, attr, O_RDONLY|O_CLOEXEC); + + else if (cxt->dir_fd >= 0) + /* request to open root of device in sysfs (/sys/block/<dev>) + * -- we cannot use cxt->sysfs_fd directly, because closedir() + * will close this our persistent file descriptor. + */ + fd = dup(cxt->dir_fd); + + if (fd < 0) + return NULL; + + dir = fdopendir(fd); + if (!dir) { + close(fd); + return NULL; + } + if (!attr) + rewinddir(dir); + return dir; +} + + +static FILE *sysfs_fopen(struct sysfs_cxt *cxt, const char *attr) +{ + int fd = sysfs_open(cxt, attr, O_RDONLY|O_CLOEXEC); + + return fd < 0 ? NULL : fdopen(fd, "r" UL_CLOEXECSTR); +} + + +static struct dirent *xreaddir(DIR *dp) +{ + struct dirent *d; + + while ((d = readdir(dp))) { + if (!strcmp(d->d_name, ".") || + !strcmp(d->d_name, "..")) + continue; + + /* blacklist here? */ + break; + } + return d; +} + +int sysfs_is_partition_dirent(DIR *dir, struct dirent *d, const char *parent_name) +{ + char path[256]; + +#ifdef _DIRENT_HAVE_D_TYPE + if (d->d_type != DT_DIR && + d->d_type != DT_LNK && + d->d_type != DT_UNKNOWN) + return 0; +#endif + if (parent_name) { + const char *p = parent_name; + size_t len; + + /* /dev/sda --> "sda" */ + if (*parent_name == '/') { + p = strrchr(parent_name, '/'); + if (!p) + return 0; + p++; + } + + len = strlen(p); + if (strlen(d->d_name) <= len) + return 0; + + /* partitions subdir name is + * "<parent>[:digit:]" or "<parent>p[:digit:]" + */ + return strncmp(p, d->d_name, len) == 0 && + ((*(d->d_name + len) == 'p' && isdigit(*(d->d_name + len + 1))) + || isdigit(*(d->d_name + len))); + } + + /* Cannot use /partition file, not supported on old sysfs */ + snprintf(path, sizeof(path), "%s/start", d->d_name); + + return faccessat(dirfd(dir), path, R_OK, 0) == 0; +} + +/* + * Converts @partno (partition number) to devno of the partition. + * The @cxt handles wholedisk device. + * + * Note that this code does not expect any special format of the + * partitions devnames. + */ +dev_t sysfs_partno_to_devno(struct sysfs_cxt *cxt, int partno) +{ + DIR *dir; + struct dirent *d; + char path[256]; + dev_t devno = 0; + + dir = sysfs_opendir(cxt, NULL); + if (!dir) + return 0; + + while ((d = xreaddir(dir))) { + int n, maj, min; + + if (!sysfs_is_partition_dirent(dir, d, NULL)) + continue; + + snprintf(path, sizeof(path), "%s/partition", d->d_name); + if (sysfs_read_int(cxt, path, &n)) + continue; + + if (n == partno) { + snprintf(path, sizeof(path), "%s/dev", d->d_name); + if (sysfs_scanf(cxt, path, "%d:%d", &maj, &min) == 2) + devno = makedev(maj, min); + break; + } + } + + closedir(dir); + return devno; +} + + +int sysfs_scanf(struct sysfs_cxt *cxt, const char *attr, const char *fmt, ...) +{ + FILE *f = sysfs_fopen(cxt, attr); + va_list ap; + int rc; + + if (!f) + return -EINVAL; + va_start(ap, fmt); + rc = vfscanf(f, fmt, ap); + va_end(ap); + + fclose(f); + return rc; +} + + +int sysfs_read_s64(struct sysfs_cxt *cxt, const char *attr, int64_t *res) +{ + int64_t x = 0; + + if (sysfs_scanf(cxt, attr, "%"SCNd64, &x) == 1) { + if (res) + *res = x; + return 0; + } + return -1; +} + +int sysfs_read_u64(struct sysfs_cxt *cxt, const char *attr, uint64_t *res) +{ + uint64_t x = 0; + + if (sysfs_scanf(cxt, attr, "%"SCNu64, &x) == 1) { + if (res) + *res = x; + return 0; + } + return -1; +} + +int sysfs_read_int(struct sysfs_cxt *cxt, const char *attr, int *res) +{ + int x = 0; + + if (sysfs_scanf(cxt, attr, "%d", &x) == 1) { + if (res) + *res = x; + return 0; + } + return -1; +} + +int sysfs_write_string(struct sysfs_cxt *cxt, const char *attr, const char *str) +{ + int fd = sysfs_open(cxt, attr, O_WRONLY|O_CLOEXEC); + int rc, errsv; + + if (fd < 0) + return -errno; + rc = write_all(fd, str, strlen(str)); + + errsv = errno; + close(fd); + errno = errsv; + return rc; +} + +int sysfs_write_u64(struct sysfs_cxt *cxt, const char *attr, uint64_t num) +{ + char buf[sizeof(stringify_value(ULLONG_MAX))]; + int fd, rc = 0, len, errsv; + + fd = sysfs_open(cxt, attr, O_WRONLY|O_CLOEXEC); + if (fd < 0) + return -errno; + + len = snprintf(buf, sizeof(buf), "%ju", num); + if (len < 0 || (size_t) len + 1 > sizeof(buf)) + rc = -errno; + else + rc = write_all(fd, buf, len); + + errsv = errno; + close(fd); + errno = errsv; + return rc; +} + +char *sysfs_strdup(struct sysfs_cxt *cxt, const char *attr) +{ + char buf[1024]; + return sysfs_scanf(cxt, attr, "%1023[^\n]", buf) == 1 ? + strdup(buf) : NULL; +} + +int sysfs_count_dirents(struct sysfs_cxt *cxt, const char *attr) +{ + DIR *dir; + int r = 0; + + if (!(dir = sysfs_opendir(cxt, attr))) + return 0; + + while (xreaddir(dir)) r++; + + closedir(dir); + return r; +} + +int sysfs_count_partitions(struct sysfs_cxt *cxt, const char *devname) +{ + DIR *dir; + struct dirent *d; + int r = 0; + + if (!(dir = sysfs_opendir(cxt, NULL))) + return 0; + + while ((d = xreaddir(dir))) { + if (sysfs_is_partition_dirent(dir, d, devname)) + r++; + } + + closedir(dir); + return r; +} + +/* + * Returns slave name if there is only one slave, otherwise returns NULL. + * The result should be deallocated by free(). + */ +char *sysfs_get_slave(struct sysfs_cxt *cxt) +{ + DIR *dir; + struct dirent *d; + char *name = NULL; + + if (!(dir = sysfs_opendir(cxt, "slaves"))) + return NULL; + + while ((d = xreaddir(dir))) { + if (name) + goto err; /* more slaves */ + + name = strdup(d->d_name); + } + + closedir(dir); + return name; +err: + free(name); + closedir(dir); + return NULL; +} + +/* + * Note that the @buf has to be large enough to store /sys/dev/block/<maj:min> + * symlinks. + */ +char *sysfs_get_devname(struct sysfs_cxt *cxt, char *buf, size_t bufsiz) +{ + char *name = NULL; + ssize_t sz; + + sz = sysfs_readlink(cxt, NULL, buf, bufsiz - 1); + if (sz < 0) + return NULL; + + buf[sz] = '\0'; + name = strrchr(buf, '/'); + if (!name) + return NULL; + + name++; + sz = strlen(name); + + memmove(buf, name, sz + 1); + return buf; +} + +#define SUBSYSTEM_LINKNAME "/subsystem" + +/* + * For example: + * + * chain: /sys/dev/block/../../devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/ \ + * 1-1.2:1.0/host65/target65:0:0/65:0:0:0/block/sdb + * + * The function check if <chain>/subsystem symlink exists, if yes then returns + * basename of the readlink result, and remove the last subdirectory from the + * <chain> path. + */ +static char *get_subsystem(char *chain, char *buf, size_t bufsz) +{ + size_t len; + char *p; + + if (!chain || !*chain) + return NULL; + + len = strlen(chain); + if (len + sizeof(SUBSYSTEM_LINKNAME) > PATH_MAX) + return NULL; + + do { + ssize_t sz; + + /* append "/subsystem" to the path */ + memcpy(chain + len, SUBSYSTEM_LINKNAME, sizeof(SUBSYSTEM_LINKNAME)); + + /* try if subsystem symlink exists */ + sz = readlink(chain, buf, bufsz - 1); + + /* remove last subsystem from chain */ + chain[len] = '\0'; + p = strrchr(chain, '/'); + if (p) { + *p = '\0'; + len = p - chain; + } + + if (sz > 0) { + /* we found symlink to subsystem, return basename */ + buf[sz] = '\0'; + return basename(buf); + } + + } while (p); + + return NULL; +} + +/* + * Returns complete path to the device, the patch contains all all sybsystems + * used for the device. + */ +char *sysfs_get_devchain(struct sysfs_cxt *cxt, char *buf, size_t bufsz) +{ + /* read /sys/dev/block/<maj>:<min> symlink */ + size_t sz = sysfs_readlink(cxt, NULL, buf, bufsz); + if (sz <= 0 || sz + sizeof(_PATH_SYS_DEVBLOCK "/") > bufsz) + return NULL; + + buf[sz++] = '\0'; + + /* create absolute patch from the link */ + memmove(buf + sizeof(_PATH_SYS_DEVBLOCK "/") - 1, buf, sz); + memcpy(buf, _PATH_SYS_DEVBLOCK "/", sizeof(_PATH_SYS_DEVBLOCK "/") - 1); + + return buf; +} + +/* + * The @subsys returns the next subsystem in the chain. Function modifies + * @devchain string. + * + * Returns: 0 in success, <0 on error, 1 on end of chain + */ +int sysfs_next_subsystem(struct sysfs_cxt *cxt __attribute__((unused)), + char *devchain, char **subsys) +{ + char subbuf[PATH_MAX]; + char *sub; + + if (!subsys || !devchain) + return -EINVAL; + + while ((sub = get_subsystem(devchain, subbuf, sizeof(subbuf)))) { + *subsys = strdup(sub); + if (!*subsys) + return -ENOMEM; + return 0; + } + + return 1; +} + + +static int is_hotpluggable_subsystem(const char *name) +{ + static const char * const hotplug_subsystems[] = { + "usb", + "ieee1394", + "pcmcia", + "mmc", + "ccw" + }; + size_t i; + + for (i = 0; i < ARRAY_SIZE(hotplug_subsystems); i++) + if (strcmp(name, hotplug_subsystems[i]) == 0) + return 1; + + return 0; +} + +int sysfs_is_hotpluggable(struct sysfs_cxt *cxt) +{ + char buf[PATH_MAX], *chain, *sub; + int rc = 0; + + + /* check /sys/dev/block/<maj>:<min>/removable attribute */ + if (sysfs_read_int(cxt, "removable", &rc) == 0 && rc == 1) + return 1; + + chain = sysfs_get_devchain(cxt, buf, sizeof(buf)); + + while (chain && sysfs_next_subsystem(cxt, chain, &sub) == 0) { + rc = is_hotpluggable_subsystem(sub); + if (rc) { + free(sub); + break; + } + free(sub); + } + + return rc; +} + +static int get_dm_wholedisk(struct sysfs_cxt *cxt, char *diskname, + size_t len, dev_t *diskdevno) +{ + int rc = 0; + char *name; + + /* Note, sysfs_get_slave() returns the first slave only, + * if there is more slaves, then return NULL + */ + name = sysfs_get_slave(cxt); + if (!name) + return -1; + + if (diskname && len) { + strncpy(diskname, name, len); + diskname[len - 1] = '\0'; + } + + if (diskdevno) { + *diskdevno = sysfs_devname_to_devno(name, NULL); + if (!*diskdevno) + rc = -1; + } + + free(name); + return rc; +} + +/* + * Returns by @diskdevno whole disk device devno and (optionaly) by + * @diskname the whole disk device name. + */ +int sysfs_devno_to_wholedisk(dev_t dev, char *diskname, + size_t len, dev_t *diskdevno) +{ + struct sysfs_cxt cxt; + int is_part = 0; + + if (!dev || sysfs_init(&cxt, dev, NULL) != 0) + return -1; + + is_part = sysfs_has_attribute(&cxt, "partition"); + if (!is_part) { + /* + * Extra case for partitions mapped by device-mapper. + * + * All regualar partitions (added by BLKPG ioctl or kernel PT + * parser) have the /sys/.../partition file. The partitions + * mapped by DM don't have such file, but they have "part" + * prefix in DM UUID. + */ + char *uuid = sysfs_strdup(&cxt, "dm/uuid"); + char *tmp = uuid; + char *prefix = uuid ? strsep(&tmp, "-") : NULL; + + if (prefix && strncasecmp(prefix, "part", 4) == 0) + is_part = 1; + free(uuid); + + if (is_part && + get_dm_wholedisk(&cxt, diskname, len, diskdevno) == 0) + /* + * partitioned device, mapped by DM + */ + goto done; + + is_part = 0; + } + + if (!is_part) { + /* + * unpartitioned device + */ + if (diskname && len) { + if (!sysfs_get_devname(&cxt, diskname, len)) + goto err; + } + if (diskdevno) + *diskdevno = dev; + + } else { + /* + * partitioned device + * - readlink /sys/dev/block/8:1 = ../../block/sda/sda1 + * - dirname ../../block/sda/sda1 = ../../block/sda + * - basename ../../block/sda = sda + */ + char linkpath[PATH_MAX]; + char *name; + int linklen; + + linklen = sysfs_readlink(&cxt, NULL, + linkpath, sizeof(linkpath) - 1); + if (linklen < 0) + goto err; + linkpath[linklen] = '\0'; + + stripoff_last_component(linkpath); /* dirname */ + name = stripoff_last_component(linkpath); /* basename */ + if (!name) + goto err; + + if (diskname && len) { + strncpy(diskname, name, len); + diskname[len - 1] = '\0'; + } + + if (diskdevno) { + *diskdevno = sysfs_devname_to_devno(name, NULL); + if (!*diskdevno) + goto err; + } + } + +done: + sysfs_deinit(&cxt); + return 0; +err: + sysfs_deinit(&cxt); + return -1; +} + +/* + * Returns 1 if the device is private LVM device. + */ +int sysfs_devno_is_lvm_private(dev_t devno) +{ + struct sysfs_cxt cxt = UL_SYSFSCXT_EMPTY; + char *uuid = NULL; + int rc = 0; + + if (sysfs_init(&cxt, devno, NULL) != 0) + return 0; + + uuid = sysfs_strdup(&cxt, "dm/uuid"); + + /* Private LVM devices use "LVM-<uuid>-<name>" uuid format (important + * is the "LVM" prefix and "-<name>" postfix). + */ + if (uuid && strncmp(uuid, "LVM-", 4) == 0) { + char *p = strrchr(uuid + 4, '-'); + + if (p && *(p + 1)) + rc = 1; + } + + sysfs_deinit(&cxt); + free(uuid); + return rc; +} + +/* + * Return 0 or 1, or < 0 in case of error + */ +int sysfs_devno_is_wholedisk(dev_t devno) +{ + dev_t disk; + + if (sysfs_devno_to_wholedisk(devno, NULL, 0, &disk) != 0) + return -1; + + return devno == disk; +} + + +int sysfs_scsi_get_hctl(struct sysfs_cxt *cxt, int *h, int *c, int *t, int *l) +{ + char buf[PATH_MAX], *hctl; + ssize_t len; + + if (!cxt) + return -EINVAL; + if (cxt->has_hctl) + goto done; + + len = sysfs_readlink(cxt, "device", buf, sizeof(buf) - 1); + if (len < 0) + return len; + + buf[len] = '\0'; + hctl = strrchr(buf, '/'); + if (!hctl) + return -1; + hctl++; + + if (sscanf(hctl, "%u:%u:%u:%u", &cxt->scsi_host, &cxt->scsi_channel, + &cxt->scsi_target, &cxt->scsi_lun) != 4) + return -1; + + cxt->has_hctl = 1; +done: + if (h) + *h = cxt->scsi_host; + if (c) + *c = cxt->scsi_channel; + if (t) + *t = cxt->scsi_target; + if (l) + *l = cxt->scsi_lun; + return 0; +} + + +static char *sysfs_scsi_host_attribute_path(struct sysfs_cxt *cxt, + const char *type, char *buf, size_t bufsz, const char *attr) +{ + int len; + int host; + + if (sysfs_scsi_get_hctl(cxt, &host, NULL, NULL, NULL)) + return NULL; + + if (attr) + len = snprintf(buf, bufsz, _PATH_SYS_CLASS "/%s_host/host%d/%s", + type, host, attr); + else + len = snprintf(buf, bufsz, _PATH_SYS_CLASS "/%s_host/host%d", + type, host); + + return (len < 0 || (size_t) len + 1 > bufsz) ? NULL : buf; +} + +char *sysfs_scsi_host_strdup_attribute(struct sysfs_cxt *cxt, + const char *type, const char *attr) +{ + char buf[1024]; + int rc; + FILE *f; + + if (!attr || !type || + !sysfs_scsi_host_attribute_path(cxt, type, buf, sizeof(buf), attr)) + return NULL; + + if (!(f = fopen(buf, "r" UL_CLOEXECSTR))) + return NULL; + + rc = fscanf(f, "%1023[^\n]", buf); + fclose(f); + + return rc == 1 ? strdup(buf) : NULL; +} + +int sysfs_scsi_host_is(struct sysfs_cxt *cxt, const char *type) +{ + char buf[PATH_MAX]; + struct stat st; + + if (!type || !sysfs_scsi_host_attribute_path(cxt, type, + buf, sizeof(buf), NULL)) + return 0; + + return stat(buf, &st) == 0 && S_ISDIR(st.st_mode); +} + +static char *sysfs_scsi_attribute_path(struct sysfs_cxt *cxt, + char *buf, size_t bufsz, const char *attr) +{ + int len, h, c, t, l; + + if (sysfs_scsi_get_hctl(cxt, &h, &c, &t, &l) != 0) + return NULL; + + if (attr) + len = snprintf(buf, bufsz, _PATH_SYS_SCSI "/devices/%d:%d:%d:%d/%s", + h,c,t,l, attr); + else + len = snprintf(buf, bufsz, _PATH_SYS_SCSI "/devices/%d:%d:%d:%d", + h,c,t,l); + return (len < 0 || (size_t) len + 1 > bufsz) ? NULL : buf; +} + +int sysfs_scsi_has_attribute(struct sysfs_cxt *cxt, const char *attr) +{ + char path[PATH_MAX]; + struct stat st; + + if (!sysfs_scsi_attribute_path(cxt, path, sizeof(path), attr)) + return 0; + + return stat(path, &st) == 0; +} + +int sysfs_scsi_path_contains(struct sysfs_cxt *cxt, const char *pattern) +{ + char path[PATH_MAX], linkc[PATH_MAX]; + struct stat st; + ssize_t len; + + if (!sysfs_scsi_attribute_path(cxt, path, sizeof(path), NULL)) + return 0; + + if (stat(path, &st) != 0) + return 0; + + len = readlink(path, linkc, sizeof(linkc) - 1); + if (len < 0) + return 0; + + linkc[len] = '\0'; + return strstr(linkc, pattern) != NULL; +} + +#ifdef TEST_PROGRAM_SYSFS +#include <errno.h> +#include <err.h> +#include <stdlib.h> + +int main(int argc, char *argv[]) +{ + struct sysfs_cxt cxt = UL_SYSFSCXT_EMPTY; + char *devname; + dev_t devno; + char path[PATH_MAX], *sub, *chain; + int i, is_part; + uint64_t u64; + ssize_t len; + + if (argc != 2) + errx(EXIT_FAILURE, "usage: %s <devname>", argv[0]); + + devname = argv[1]; + devno = sysfs_devname_to_devno(devname, NULL); + + if (!devno) + err(EXIT_FAILURE, "failed to read devno"); + + is_part = sysfs_devno_has_attribute(devno, "partition"); + + printf("NAME: %s\n", devname); + printf("DEVNO: %u (%d:%d)\n", (unsigned int) devno, major(devno), minor(devno)); + printf("DEVNOPATH: %s\n", sysfs_devno_path(devno, path, sizeof(path))); + printf("DEVPATH: %s\n", sysfs_devno_to_devpath(devno, path, sizeof(path))); + printf("PARTITION: %s\n", is_part ? "YES" : "NOT"); + + if (sysfs_init(&cxt, devno, NULL)) + return EXIT_FAILURE; + + len = sysfs_readlink(&cxt, NULL, path, sizeof(path) - 1); + if (len > 0) { + path[len] = '\0'; + printf("DEVNOLINK: %s\n", path); + } + + if (!is_part) { + printf("First 5 partitions:\n"); + for (i = 1; i <= 5; i++) { + dev_t dev = sysfs_partno_to_devno(&cxt, i); + if (dev) + printf("\t#%d %d:%d\n", i, major(dev), minor(dev)); + } + } + + printf("SLAVES: %d\n", sysfs_count_dirents(&cxt, "slaves")); + + if (sysfs_read_u64(&cxt, "size", &u64)) + printf("read SIZE failed\n"); + else + printf("SIZE: %jd\n", u64); + + if (sysfs_read_int(&cxt, "queue/hw_sector_size", &i)) + printf("read SECTOR failed\n"); + else + printf("SECTOR: %d\n", i); + + printf("DEVNAME: %s\n", sysfs_get_devname(&cxt, path, sizeof(path))); + printf("HOTPLUG: %s\n", sysfs_is_hotpluggable(&cxt) ? "yes" : "no"); + + chain = sysfs_get_devchain(&cxt, path, sizeof(path)); + printf("SUBSUSTEMS:\n"); + + while (chain && sysfs_next_subsystem(&cxt, chain, &sub) == 0) { + printf("\t%s\n", sub); + free(sub); + } + + + sysfs_deinit(&cxt); + return EXIT_SUCCESS; +} +#endif diff --git a/libblkid/lib/terminal-colors.d.5 b/libblkid/lib/terminal-colors.d.5 new file mode 100644 index 000000000..66ecf2c48 --- /dev/null +++ b/libblkid/lib/terminal-colors.d.5 @@ -0,0 +1,190 @@ +.\" terminal-colors.d.5 -- +.\" Copyright 2014 Ondrej Oprala <ooprala@redhat.com> +.\" Copyright (C) 2014 Karel Zak <kzak@redhat.com> +.\" Copyright 2014 Red Hat, Inc. +.\" May be distributed under the GNU General Public License +.TH "TERMINAL_COLORS.D" "5" "January 2014" "util-linux" "terminal-colors.d" +.SH "NAME" +terminal-colors.d \- Configure output colorization for various utilities +.SH "SYNOPSIS" +/etc/terminal-colors\&.d/[[\fIname\fR][@\fIterm\fR]\&.][\fItype\fR] +.SH "DESCRIPTION" +Files in this directory determine the default behavior for utilities +when coloring output. + +The +.I name +is a utility name. The name is optional and when none is specified then the +file is used for all unspecified utilities. + +The +.I term +is a terminal identifier (the TERM environment variable). +The terminal identifier is optional and when none is specified then the file +is used for all unspecified terminals. + +The +.I type +is a file type. Supported file types are: +.TP +.B disable +Turns off output colorization for all compatible utilities. +.TP +.B enable +Turns on output colorization; any matching +.B disable +files are ignored. +.TP +.B scheme +Specifies colors used for output. The file format may be specific to the utility, +the default format is described below. +.PP +If there are more files that match for a utility, then the file with the more +specific filename wins. For example, the filename "@xterm.scheme" has less +priority than "dmesg@xterm.scheme". The lowest priority are those files without a +utility name and terminal identifier (e.g. "disable"). + +The user-specific +.I $XDG_CONFIG_HOME/terminal-colors.d +or +.I $HOME/.config/terminal-colors.d +overrides the global setting. + +.SH EXAMPLES +Disable colors for all compatible utilities: +.RS +.br +.B "touch /etc/terminal-colors.d/disable" +.br +.RE + +Disable colors for all compatible utils on a vt100 terminal: +.RS +.br +.B "touch /etc/terminal-colors.d/@vt100.disable" +.br +.RE + +Disable colors for all compatible utils except dmesg(1): +.RS +.br +.B "touch /etc/terminal-colors.d/disable" +.sp +.B "touch /etc/terminal-colors.d/dmesg.enable" +.br +.RE + +.SH DEFAULT SCHEME FILES FORMAT +The following statement is recognized: + +.RS +.br +.B "name color-sequence" +.br +.RE + +The +.B name +is a logical name of color sequence (for example "error"). The names are +specific to the utilities. For more details always see the COLORS section +in the man page for the utility. + +The +.B color-sequence +is a color name, ASCII color sequences or escape sequences. + +.SS Color names +black, blue, brown, cyan, darkgray, gray, green, lightblue, lightcyan +lightgray, lightgreen, lightmagenta, lightred, magenta, red and yellow +.SS ANSI color sequences +The color sequences are composed of sequences of numbers +separated by semicolons. The most common codes are: +.sp +.RS +.TS +l l. + 0 to restore default color + 1 for brighter colors + 4 for underlined text + 5 for flashing text +30 for black foreground +31 for red foreground +32 for green foreground +33 for yellow (or brown) foreground +34 for blue foreground +35 for purple foreground +36 for cyan foreground +37 for white (or gray) foreground +40 for black background +41 for red background +42 for green background +43 for yellow (or brown) background +44 for blue background +45 for purple background +46 for cyan background +47 for white (or gray) background +.TE +.RE +.SS Escape sequences +To specify control or blank characters in the color sequences, +C-style \e-escaped notation can be used: +.sp +.RS +.TS +lb l. +\ea Bell (ASCII 7) +\eb Backspace (ASCII 8) +\ee Escape (ASCII 27) +\ef Form feed (ASCII 12) +\en Newline (ASCII 10) +\er Carriage Return (ASCII 13) +\et Tab (ASCII 9) +\ev Vertical Tab (ASCII 11) +\e? Delete (ASCII 127) +\e_ Space +\e\e Backslash (\e) +\e^ Caret (^) +\e# Hash mark (#) +.TE +.RE +.sp +Please note that escapes are necessary to enter a space, backslash, +caret, or any control character anywhere in the string, as well as a +hash mark as the first character. + +For example, to use a red background for alert messages in the output of +.BR dmesg (1), +use: + +.RS +.br +.B "echo 'alert 37;41' >> /etc/terminal-colors.d/dmesg.scheme" +.br +.RE + +.SS Comments +Lines where the first non-blank character is a # (hash) are ignored. +Any other use of the hash character is not interpreted as introducing +a comment. + +.SH FILES +.B $XDG_CONFIG_HOME/terminal-colors.d +.br +.B $HOME/.config/terminal-colors.d +.br +.B /etc/terminal-colors.d + +.SH ENVIRONMENT +.IP TERMINAL_COLORS_DEBUG=all +enables debug output. + +.SH COMPATIBILITY +The terminal-colors.d functionality is currently supported by all util-linux +utilities which provides colorized output. For more details always see the +COLORS section in the man page for the utility. + +.SH AVAILABILITY +terminal-colors.d is part of the util-linux package and is available from +.UR ftp://\:ftp.kernel.org\:/pub\:/linux\:/utils\:/util-linux/ +Linux Kernel Archive +.UE . diff --git a/libblkid/lib/timeutils.c b/libblkid/lib/timeutils.c new file mode 100644 index 000000000..b811041e4 --- /dev/null +++ b/libblkid/lib/timeutils.c @@ -0,0 +1,342 @@ +/*** + First set of functions in this file are part of systemd, and were + copied to util-linux at August 2013. + + Copyright 2010 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with util-linux; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <assert.h> +#include <ctype.h> +#include <string.h> +#include <sys/sysinfo.h> +#include <sys/time.h> +#include <time.h> + +#include "c.h" +#include "nls.h" +#include "strutils.h" +#include "timeutils.h" + +#define WHITESPACE " \t\n\r" + +#define streq(a,b) (strcmp((a),(b)) == 0) + +static int parse_sec(const char *t, usec_t *usec) +{ + static const struct { + const char *suffix; + usec_t usec; + } table[] = { + { "seconds", USEC_PER_SEC }, + { "second", USEC_PER_SEC }, + { "sec", USEC_PER_SEC }, + { "s", USEC_PER_SEC }, + { "minutes", USEC_PER_MINUTE }, + { "minute", USEC_PER_MINUTE }, + { "min", USEC_PER_MINUTE }, + { "months", USEC_PER_MONTH }, + { "month", USEC_PER_MONTH }, + { "msec", USEC_PER_MSEC }, + { "ms", USEC_PER_MSEC }, + { "m", USEC_PER_MINUTE }, + { "hours", USEC_PER_HOUR }, + { "hour", USEC_PER_HOUR }, + { "hr", USEC_PER_HOUR }, + { "h", USEC_PER_HOUR }, + { "days", USEC_PER_DAY }, + { "day", USEC_PER_DAY }, + { "d", USEC_PER_DAY }, + { "weeks", USEC_PER_WEEK }, + { "week", USEC_PER_WEEK }, + { "w", USEC_PER_WEEK }, + { "years", USEC_PER_YEAR }, + { "year", USEC_PER_YEAR }, + { "y", USEC_PER_YEAR }, + { "usec", 1ULL }, + { "us", 1ULL }, + { "", USEC_PER_SEC }, /* default is sec */ + }; + + const char *p; + usec_t r = 0; + int something = FALSE; + + assert(t); + assert(usec); + + p = t; + for (;;) { + long long l, z = 0; + char *e; + unsigned i, n = 0; + + p += strspn(p, WHITESPACE); + + if (*p == 0) { + if (!something) + return -EINVAL; + + break; + } + + errno = 0; + l = strtoll(p, &e, 10); + + if (errno > 0) + return -errno; + + if (l < 0) + return -ERANGE; + + if (*e == '.') { + char *b = e + 1; + + errno = 0; + z = strtoll(b, &e, 10); + if (errno > 0) + return -errno; + + if (z < 0) + return -ERANGE; + + if (e == b) + return -EINVAL; + + n = e - b; + + } else if (e == p) + return -EINVAL; + + e += strspn(e, WHITESPACE); + + for (i = 0; i < ARRAY_SIZE(table); i++) + if (startswith(e, table[i].suffix)) { + usec_t k = (usec_t) z * table[i].usec; + + for (; n > 0; n--) + k /= 10; + + r += (usec_t) l *table[i].usec + k; + p = e + strlen(table[i].suffix); + + something = TRUE; + break; + } + + if (i >= ARRAY_SIZE(table)) + return -EINVAL; + + } + + *usec = r; + + return 0; +} + +int parse_timestamp(const char *t, usec_t *usec) +{ + static const struct { + const char *name; + const int nr; + } day_nr[] = { + { "Sunday", 0 }, + { "Sun", 0 }, + { "Monday", 1 }, + { "Mon", 1 }, + { "Tuesday", 2 }, + { "Tue", 2 }, + { "Wednesday", 3 }, + { "Wed", 3 }, + { "Thursday", 4 }, + { "Thu", 4 }, + { "Friday", 5 }, + { "Fri", 5 }, + { "Saturday", 6 }, + { "Sat", 6 }, + }; + + const char *k; + struct tm tm, copy; + time_t x; + usec_t plus = 0, minus = 0, ret; + int r, weekday = -1; + unsigned i; + + /* + * Allowed syntaxes: + * + * 2012-09-22 16:34:22 + * 2012-09-22 16:34 (seconds will be set to 0) + * 2012-09-22 (time will be set to 00:00:00) + * 16:34:22 (date will be set to today) + * 16:34 (date will be set to today, seconds to 0) + * now + * yesterday (time is set to 00:00:00) + * today (time is set to 00:00:00) + * tomorrow (time is set to 00:00:00) + * +5min + * -5days + * + */ + + assert(t); + assert(usec); + + x = time(NULL); + localtime_r(&x, &tm); + tm.tm_isdst = -1; + + if (streq(t, "now")) + goto finish; + + else if (streq(t, "today")) { + tm.tm_sec = tm.tm_min = tm.tm_hour = 0; + goto finish; + + } else if (streq(t, "yesterday")) { + tm.tm_mday--; + tm.tm_sec = tm.tm_min = tm.tm_hour = 0; + goto finish; + + } else if (streq(t, "tomorrow")) { + tm.tm_mday++; + tm.tm_sec = tm.tm_min = tm.tm_hour = 0; + goto finish; + + } else if (t[0] == '+') { + + r = parse_sec(t + 1, &plus); + if (r < 0) + return r; + + goto finish; + } else if (t[0] == '-') { + + r = parse_sec(t + 1, &minus); + if (r < 0) + return r; + + goto finish; + + } else if (endswith(t, " ago")) { + char *z; + + z = strndup(t, strlen(t) - 4); + if (!z) + return -ENOMEM; + + r = parse_sec(z, &minus); + free(z); + if (r < 0) + return r; + + goto finish; + } + + for (i = 0; i < ARRAY_SIZE(day_nr); i++) { + size_t skip; + + if (!startswith_no_case(t, day_nr[i].name)) + continue; + + skip = strlen(day_nr[i].name); + if (t[skip] != ' ') + continue; + + weekday = day_nr[i].nr; + t += skip + 1; + break; + } + + copy = tm; + k = strptime(t, "%y-%m-%d %H:%M:%S", &tm); + if (k && *k == 0) + goto finish; + + tm = copy; + k = strptime(t, "%Y-%m-%d %H:%M:%S", &tm); + if (k && *k == 0) + goto finish; + + tm = copy; + k = strptime(t, "%y-%m-%d %H:%M", &tm); + if (k && *k == 0) { + tm.tm_sec = 0; + goto finish; + } + + tm = copy; + k = strptime(t, "%Y-%m-%d %H:%M", &tm); + if (k && *k == 0) { + tm.tm_sec = 0; + goto finish; + } + + tm = copy; + k = strptime(t, "%y-%m-%d", &tm); + if (k && *k == 0) { + tm.tm_sec = tm.tm_min = tm.tm_hour = 0; + goto finish; + } + + tm = copy; + k = strptime(t, "%Y-%m-%d", &tm); + if (k && *k == 0) { + tm.tm_sec = tm.tm_min = tm.tm_hour = 0; + goto finish; + } + + tm = copy; + k = strptime(t, "%H:%M:%S", &tm); + if (k && *k == 0) + goto finish; + + tm = copy; + k = strptime(t, "%H:%M", &tm); + if (k && *k == 0) { + tm.tm_sec = 0; + goto finish; + } + + tm = copy; + k = strptime(t, "%Y%m%d%H%M%S", &tm); + if (k && *k == 0) { + tm.tm_sec = 0; + goto finish; + } + + return -EINVAL; + + finish: + x = mktime(&tm); + if (x == (time_t)-1) + return -EINVAL; + + if (weekday >= 0 && tm.tm_wday != weekday) + return -EINVAL; + + ret = (usec_t) x *USEC_PER_SEC; + + ret += plus; + if (ret > minus) + ret -= minus; + else + ret = 0; + + *usec = ret; + + return 0; +} diff --git a/libblkid/lib/ttyutils.c b/libblkid/lib/ttyutils.c new file mode 100644 index 000000000..ea551e26c --- /dev/null +++ b/libblkid/lib/ttyutils.c @@ -0,0 +1,95 @@ +/* + * No copyright is claimed. This code is in the public domain; do with + * it what you wish. + * + * Written by Karel Zak <kzak@redhat.com> + */ +#include <ctype.h> + +#include "c.h" +#include "ttyutils.h" + +int get_terminal_width(void) +{ +#ifdef TIOCGSIZE + struct ttysize t_win; +#endif +#ifdef TIOCGWINSZ + struct winsize w_win; +#endif + const char *cp; + +#ifdef TIOCGSIZE + if (ioctl (STDIN_FILENO, TIOCGSIZE, &t_win) == 0) + return t_win.ts_cols; +#endif +#ifdef TIOCGWINSZ + if (ioctl (STDIN_FILENO, TIOCGWINSZ, &w_win) == 0) + return w_win.ws_col; +#endif + cp = getenv("COLUMNS"); + if (cp) { + char *end = NULL; + long c; + + errno = 0; + c = strtol(cp, &end, 10); + + if (errno == 0 && end && *end == '\0' && end > cp && + c > 0 && c <= INT_MAX) + return c; + } + return 0; +} + +int get_terminal_name(int fd, + const char **path, + const char **name, + const char **number) +{ + const char *tty; + const char *p; + + if (name) + *name = NULL; + if (path) + *path = NULL; + if (number) + *number = NULL; + + tty = ttyname(fd); + if (!tty) + return -1; + if (path) + *path = tty; + tty = strncmp(tty, "/dev/", 5) == 0 ? tty + 5 : tty; + if (name) + *name = tty; + if (number) { + for (p = tty; p && *p; p++) { + if (isdigit(*p)) { + *number = p; + break; + } + } + } + return 0; +} + + +#ifdef TEST_PROGRAM +# include <stdlib.h> +int main(void) +{ + const char *path, *name, *num; + + if (get_terminal_name(STDERR_FILENO, &path, &name, &num) == 0) { + fprintf(stderr, "tty path: %s\n", path); + fprintf(stderr, "tty name: %s\n", name); + fprintf(stderr, "tty number: %s\n", num); + } + fprintf(stderr, "tty width: %d\n", get_terminal_width()); + + return EXIT_SUCCESS; +} +#endif |