diff options
Diffstat (limited to 'mtdutils/mounts.c')
| -rw-r--r-- | mtdutils/mounts.c | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/mtdutils/mounts.c b/mtdutils/mounts.c deleted file mode 100644 index 2ab3ff60c..000000000 --- a/mtdutils/mounts.c +++ /dev/null @@ -1,214 +0,0 @@ -/* - * Copyright (C) 2007 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <fcntl.h> -#include <errno.h> -#include <sys/mount.h> - -#include "mounts.h" - -struct MountedVolume { - const char *device; - const char *mount_point; - const char *filesystem; - const char *flags; -}; - -typedef struct { - MountedVolume *volumes; - int volumes_allocd; - int volume_count; -} MountsState; - -static MountsState g_mounts_state = { - NULL, // volumes - 0, // volumes_allocd - 0 // volume_count -}; - -static inline void -free_volume_internals(const MountedVolume *volume, int zero) -{ - free((char *)volume->device); - free((char *)volume->mount_point); - free((char *)volume->filesystem); - free((char *)volume->flags); - if (zero) { - memset((void *)volume, 0, sizeof(*volume)); - } -} - -#define PROC_MOUNTS_FILENAME "/proc/mounts" - -int -scan_mounted_volumes() -{ - char buf[2048]; - const char *bufp; - int fd; - ssize_t nbytes; - - if (g_mounts_state.volumes == NULL) { - const int numv = 32; - MountedVolume *volumes = malloc(numv * sizeof(*volumes)); - if (volumes == NULL) { - errno = ENOMEM; - return -1; - } - g_mounts_state.volumes = volumes; - g_mounts_state.volumes_allocd = numv; - memset(volumes, 0, numv * sizeof(*volumes)); - } else { - /* Free the old volume strings. - */ - int i; - for (i = 0; i < g_mounts_state.volume_count; i++) { - free_volume_internals(&g_mounts_state.volumes[i], 1); - } - } - g_mounts_state.volume_count = 0; - - /* Open and read the file contents. - */ - fd = open(PROC_MOUNTS_FILENAME, O_RDONLY); - if (fd < 0) { - goto bail; - } - nbytes = read(fd, buf, sizeof(buf) - 1); - close(fd); - if (nbytes < 0) { - goto bail; - } - buf[nbytes] = '\0'; - - /* Parse the contents of the file, which looks like: - * - * # cat /proc/mounts - * rootfs / rootfs rw 0 0 - * /dev/pts /dev/pts devpts rw 0 0 - * /proc /proc proc rw 0 0 - * /sys /sys sysfs rw 0 0 - * /dev/block/mtdblock4 /system yaffs2 rw,nodev,noatime,nodiratime 0 0 - * /dev/block/mtdblock5 /data yaffs2 rw,nodev,noatime,nodiratime 0 0 - * /dev/block/mmcblk0p1 /sdcard vfat rw,sync,dirsync,fmask=0000,dmask=0000,codepage=cp437,iocharset=iso8859-1,utf8 0 0 - * - * The zeroes at the end are dummy placeholder fields to make the - * output match Linux's /etc/mtab, but don't represent anything here. - */ - bufp = buf; - while (nbytes > 0) { - char device[64]; - char mount_point[64]; - char filesystem[64]; - char flags[128]; - int matches; - - /* %as is a gnu extension that malloc()s a string for each field. - */ - matches = sscanf(bufp, "%63s %63s %63s %127s", - device, mount_point, filesystem, flags); - - if (matches == 4) { - device[sizeof(device)-1] = '\0'; - mount_point[sizeof(mount_point)-1] = '\0'; - filesystem[sizeof(filesystem)-1] = '\0'; - flags[sizeof(flags)-1] = '\0'; - - MountedVolume *v = - &g_mounts_state.volumes[g_mounts_state.volume_count++]; - v->device = strdup(device); - v->mount_point = strdup(mount_point); - v->filesystem = strdup(filesystem); - v->flags = strdup(flags); - } else { -printf("matches was %d on <<%.40s>>\n", matches, bufp); - } - - /* Eat the line. - */ - while (nbytes > 0 && *bufp != '\n') { - bufp++; - nbytes--; - } - if (nbytes > 0) { - bufp++; - nbytes--; - } - } - - return 0; - -bail: -//TODO: free the strings we've allocated. - g_mounts_state.volume_count = 0; - return -1; -} - -const MountedVolume * -find_mounted_volume_by_device(const char *device) -{ - if (g_mounts_state.volumes != NULL) { - int i; - for (i = 0; i < g_mounts_state.volume_count; i++) { - MountedVolume *v = &g_mounts_state.volumes[i]; - /* May be null if it was unmounted and we haven't rescanned. - */ - if (v->device != NULL) { - if (strcmp(v->device, device) == 0) { - return v; - } - } - } - } - return NULL; -} - -const MountedVolume * -find_mounted_volume_by_mount_point(const char *mount_point) -{ - if (g_mounts_state.volumes != NULL) { - int i; - for (i = 0; i < g_mounts_state.volume_count; i++) { - MountedVolume *v = &g_mounts_state.volumes[i]; - /* May be null if it was unmounted and we haven't rescanned. - */ - if (v->mount_point != NULL) { - if (strcmp(v->mount_point, mount_point) == 0) { - return v; - } - } - } - } - return NULL; -} - -int -unmount_mounted_volume(const MountedVolume *volume) -{ - /* Intentionally pass NULL to umount if the caller tries - * to unmount a volume they already unmounted using this - * function. - */ - int ret = umount(volume->mount_point); - if (ret == 0) { - free_volume_internals(volume, 1); - return 0; - } - return ret; -} |