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authorbigbiff <bigbiff@teamw.in>2015-01-02 01:44:14 +0100
committerDees Troy <dees_troy@teamw.in>2015-01-05 04:38:42 +0100
commit7b4c7a681cc4c0a53dc8a8baf4853e921cfbf5de (patch)
treefb69cb515cb4ab675d5850684cc402100b7a2a22 /libblkid/devno.c
parentcrypto: remove unused libs and clean up makefile (diff)
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Diffstat (limited to 'libblkid/devno.c')
-rw-r--r--libblkid/devno.c379
1 files changed, 0 insertions, 379 deletions
diff --git a/libblkid/devno.c b/libblkid/devno.c
deleted file mode 100644
index 906c91fcd..000000000
--- a/libblkid/devno.c
+++ /dev/null
@@ -1,379 +0,0 @@
-/*
- * devno.c - find a particular device by its device number (major/minor)
- *
- * Copyright (C) 2000, 2001, 2003 Theodore Ts'o
- * Copyright (C) 2001 Andreas Dilger
- *
- * %Begin-Header%
- * This file may be redistributed under the terms of the
- * GNU Lesser General Public License.
- * %End-Header%
- */
-
-#include <stdio.h>
-#include <string.h>
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#include <stdlib.h>
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-#include <dirent.h>
-#ifdef HAVE_ERRNO_H
-#include <errno.h>
-#endif
-#ifdef HAVE_SYS_MKDEV_H
-#include <sys/mkdev.h>
-#endif
-#include <fcntl.h>
-#include <inttypes.h>
-
-#include "blkidP.h"
-#include "pathnames.h"
-#include "at.h"
-#include "sysfs.h"
-
-static char *blkid_strconcat(const char *a, const char *b, const char *c)
-{
- char *res, *p;
- size_t len, al, bl, cl;
-
- al = a ? strlen(a) : 0;
- bl = b ? strlen(b) : 0;
- cl = c ? strlen(c) : 0;
-
- len = al + bl + cl;
- if (!len)
- return NULL;
- p = res = malloc(len + 1);
- if (!res)
- return NULL;
- if (al) {
- memcpy(p, a, al);
- p += al;
- }
- if (bl) {
- memcpy(p, b, bl);
- p += bl;
- }
- if (cl) {
- memcpy(p, c, cl);
- p += cl;
- }
- *p = '\0';
- return res;
-}
-
-/*
- * This function adds an entry to the directory list
- */
-static void add_to_dirlist(const char *dir, const char *subdir,
- struct dir_list **list)
-{
- struct dir_list *dp;
-
- dp = malloc(sizeof(struct dir_list));
- if (!dp)
- return;
- dp->name = subdir ? blkid_strconcat(dir, "/", subdir) :
- dir ? strdup(dir) : NULL;
-
- if (!dp->name) {
- free(dp);
- return;
- }
- dp->next = *list;
- *list = dp;
-}
-
-/*
- * This function frees a directory list
- */
-static void free_dirlist(struct dir_list **list)
-{
- struct dir_list *dp, *next;
-
- for (dp = *list; dp; dp = next) {
- next = dp->next;
- free(dp->name);
- free(dp);
- }
- *list = NULL;
-}
-
-void blkid__scan_dir(char *dirname, dev_t devno, struct dir_list **list,
- char **devname)
-{
- DIR *dir;
- struct dirent *dp;
- struct stat st;
-
- if ((dir = opendir(dirname)) == NULL)
- return;
-
- while ((dp = readdir(dir)) != NULL) {
-#ifdef _DIRENT_HAVE_D_TYPE
- if (dp->d_type != DT_UNKNOWN && dp->d_type != DT_BLK &&
- dp->d_type != DT_LNK && dp->d_type != DT_DIR)
- continue;
-#endif
- if (dp->d_name[0] == '.' &&
- ((dp->d_name[1] == 0) ||
- ((dp->d_name[1] == '.') && (dp->d_name[2] == 0))))
- continue;
-
- if (fstat_at(dirfd(dir), dirname, dp->d_name, &st, 0))
- continue;
-
- if (S_ISBLK(st.st_mode) && st.st_rdev == devno) {
- *devname = blkid_strconcat(dirname, "/", dp->d_name);
- DBG(DEBUG_DEVNO,
- printf("found 0x%llx at %s\n", (long long)devno,
- *devname));
- break;
- }
-
- if (!list || !S_ISDIR(st.st_mode))
- continue;
-
- /* add subdirectory (but not symlink) to the list */
-#ifdef _DIRENT_HAVE_D_TYPE
- if (dp->d_type == DT_LNK)
- continue;
- if (dp->d_type == DT_UNKNOWN)
-#endif
- {
- if (fstat_at(dirfd(dir), dirname, dp->d_name, &st, 1) ||
- !S_ISDIR(st.st_mode))
- continue; /* symlink or lstat() failed */
- }
-
- if (*dp->d_name == '.' || (
-#ifdef _DIRENT_HAVE_D_TYPE
- dp->d_type == DT_DIR &&
-#endif
- strcmp(dp->d_name, "shm") == 0))
- /* ignore /dev/.{udev,mount,mdadm} and /dev/shm */
- continue;
-
- add_to_dirlist(dirname, dp->d_name, list);
- }
- closedir(dir);
- return;
-}
-
-/* Directories where we will try to search for device numbers */
-static const char *devdirs[] = { "/devices", "/devfs", "/dev", NULL };
-
-/**
- * SECTION: misc
- * @title: Miscellaneous utils
- * @short_description: mix of various utils for low-level and high-level API
- */
-
-
-
-static char *scandev_devno_to_devpath(dev_t devno)
-{
- struct dir_list *list = NULL, *new_list = NULL;
- char *devname = NULL;
- const char **dir;
-
- /*
- * Add the starting directories to search in reverse order of
- * importance, since we are using a stack...
- */
- for (dir = devdirs; *dir; dir++)
- add_to_dirlist(*dir, NULL, &list);
-
- while (list) {
- struct dir_list *current = list;
-
- list = list->next;
- DBG(DEBUG_DEVNO, printf("directory %s\n", current->name));
- blkid__scan_dir(current->name, devno, &new_list, &devname);
- free(current->name);
- free(current);
- if (devname)
- break;
- /*
- * If we're done checking at this level, descend to
- * the next level of subdirectories. (breadth-first)
- */
- if (list == NULL) {
- list = new_list;
- new_list = NULL;
- }
- }
- free_dirlist(&list);
- free_dirlist(&new_list);
-
- return devname;
-}
-
-/**
- * blkid_devno_to_devname:
- * @devno: device number
- *
- * This function finds the pathname to a block device with a given
- * device number.
- *
- * Returns: a pointer to allocated memory to the pathname on success,
- * and NULL on failure.
- */
-char *blkid_devno_to_devname(dev_t devno)
-{
- char *path = NULL;
- char buf[PATH_MAX];
-
- path = sysfs_devno_to_devpath(devno, buf, sizeof(buf));
- if (path)
- path = strdup(path);
- if (!path)
- path = scandev_devno_to_devpath(devno);
-
- if (!path) {
- DBG(DEBUG_DEVNO,
- printf("blkid: couldn't find devno 0x%04lx\n",
- (unsigned long) devno));
- } else {
- DBG(DEBUG_DEVNO,
- printf("found devno 0x%04llx as %s\n", (long long)devno, path));
- }
-
- return path;
-}
-
-
-/**
- * blkid_devno_to_wholedisk:
- * @dev: device number
- * @diskname: buffer to return diskname (or NULL)
- * @len: diskname buffer size (or 0)
- * @diskdevno: pointer to returns devno of entire disk (or NULL)
- *
- * This function uses sysfs to convert the @devno device number to the *name*
- * of the whole disk. The function DOES NOT return full device name. The @dev
- * argument could be partition or whole disk -- both is converted.
- *
- * For example: sda1, 0x0801 --> sda, 0x0800
- *
- * For conversion to the full disk *path* use blkid_devno_to_devname(), for
- * example:
- *
- * <informalexample>
- * <programlisting>
- *
- * dev_t dev = 0x0801, disk; // sda1 = 8:1
- * char *diskpath, diskname[32];
- *
- * blkid_devno_to_wholedisk(dev, diskname, sizeof(diskname), &disk);
- * diskpath = blkid_devno_to_devname(disk);
- *
- * // print "0x0801: sda, /dev/sda, 8:0
- * printf("0x%x: %s, %s, %d:%d\n",
- * dev, diskname, diskpath, major(disk), minor(disk));
- *
- * free(diskpath);
- *
- * </programlisting>
- * </informalexample>
- *
- * Returns: 0 on success or -1 in case of error.
- */
-int blkid_devno_to_wholedisk(dev_t dev, char *diskname,
- size_t len, dev_t *diskdevno)
-{
- return sysfs_devno_to_wholedisk( dev, diskname, len, diskdevno);
-}
-
-/*
- * Returns 1 if the @major number is associated with @drvname.
- */
-int blkid_driver_has_major(const char *drvname, int major)
-{
- FILE *f;
- char buf[128];
- int match = 0;
-
- f = fopen(_PATH_PROC_DEVICES, "r");
- if (!f)
- return 0;
-
- while (fgets(buf, sizeof(buf), f)) { /* skip to block dev section */
- if (strncmp("Block devices:\n", buf, sizeof(buf)) == 0)
- break;
- }
-
- while (fgets(buf, sizeof(buf), f)) {
- int maj;
- char name[64 + 1];
-
- if (sscanf(buf, "%d %64[^\n ]", &maj, name) != 2)
- continue;
-
- if (maj == major && strcmp(name, drvname) == 0) {
- match = 1;
- break;
- }
- }
-
- fclose(f);
-
- DBG(DEBUG_DEVNO, printf("major %d %s associated with '%s' driver\n",
- major, match ? "is" : "is NOT", drvname));
- return match;
-}
-
-
-#ifdef TEST_PROGRAM
-int main(int argc, char** argv)
-{
- char *devname, *tmp;
- char diskname[PATH_MAX];
- int major, minor;
- dev_t devno, disk_devno;
- const char *errmsg = "Couldn't parse %s: %s\n";
-
- blkid_init_debug(DEBUG_ALL);
- if ((argc != 2) && (argc != 3)) {
- fprintf(stderr, "Usage:\t%s device_number\n\t%s major minor\n"
- "Resolve a device number to a device name\n",
- argv[0], argv[0]);
- exit(1);
- }
- if (argc == 2) {
- devno = strtoul(argv[1], &tmp, 0);
- if (*tmp) {
- fprintf(stderr, errmsg, "device number", argv[1]);
- exit(1);
- }
- } else {
- major = strtoul(argv[1], &tmp, 0);
- if (*tmp) {
- fprintf(stderr, errmsg, "major number", argv[1]);
- exit(1);
- }
- minor = strtoul(argv[2], &tmp, 0);
- if (*tmp) {
- fprintf(stderr, errmsg, "minor number", argv[2]);
- exit(1);
- }
- devno = makedev(major, minor);
- }
- printf("Looking for device 0x%04llx\n", (long long)devno);
- devname = blkid_devno_to_devname(devno);
- free(devname);
-
- printf("Looking for whole-device for 0x%04llx\n", (long long)devno);
- if (blkid_devno_to_wholedisk(devno, diskname,
- sizeof(diskname), &disk_devno) == 0)
- printf("found devno 0x%04llx as /dev/%s\n", (long long) disk_devno, diskname);
-
- return 0;
-}
-#endif