diff options
| -rw-r--r-- | adb/remount_service.c | 46 |
1 files changed, 27 insertions, 19 deletions
diff --git a/adb/remount_service.c b/adb/remount_service.c index 26bc841..4cb41e7 100644 --- a/adb/remount_service.c +++ b/adb/remount_service.c @@ -30,19 +30,19 @@ static int system_ro = 1; -/* Returns the mount number of the requested partition from /proc/mtd */ -static int find_mount(const char *findme) +/* Returns the device used to mount a directory in /proc/mounts */ +static char *find_mount(const char *dir) { int fd; int res; int size; char *token = NULL; const char delims[] = "\n"; - char buf[1024]; + char buf[4096]; - fd = unix_open("/proc/mtd", O_RDONLY); + fd = unix_open("/proc/mounts", O_RDONLY); if (fd < 0) - return -errno; + return NULL; buf[sizeof(buf) - 1] = '\0'; size = adb_read(fd, buf, sizeof(buf) - 1); @@ -51,33 +51,41 @@ static int find_mount(const char *findme) token = strtok(buf, delims); while (token) { - char mtdname[16]; - int mtdnum, mtdsize, mtderasesize; - - res = sscanf(token, "mtd%d: %x %x %15s", - &mtdnum, &mtdsize, &mtderasesize, mtdname); - - if (res == 4 && !strcmp(mtdname, findme)) - return mtdnum; + char mount_dev[256]; + char mount_dir[256]; + int mount_freq; + int mount_passno; + + res = sscanf(token, "%255s %255s %*s %*s %d %d\n", + mount_dev, mount_dir, &mount_freq, &mount_passno); + mount_dev[255] = 0; + mount_dir[255] = 0; + if (res == 4 && (strcmp(dir, mount_dir) == 0)) + return strdup(mount_dev); token = strtok(NULL, delims); } - return -1; + return NULL; } /* Init mounts /system as read only, remount to enable writes. */ static int remount_system() { - int num; - char source[64]; + char *dev; + if (system_ro == 0) { return 0; } - if ((num = find_mount("\"system\"")) < 0) + + dev = find_mount("/system"); + + if (!dev) return -1; - snprintf(source, sizeof source, "/dev/block/mtdblock%d", num); - system_ro = mount(source, "/system", "yaffs2", MS_REMOUNT, NULL); + system_ro = mount(dev, "/system", "none", MS_REMOUNT, NULL); + + free(dev); + return system_ro; } |