diff options
Diffstat (limited to 'libbb/find_mount_point.c')
| -rw-r--r-- | libbb/find_mount_point.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/libbb/find_mount_point.c b/libbb/find_mount_point.c index 4cd6b1618..12b2cfce4 100644 --- a/libbb/find_mount_point.c +++ b/libbb/find_mount_point.c @@ -17,7 +17,7 @@ * Given any other file (or directory), find the mount table entry for its * filesystem. */ -struct mntent* FAST_FUNC find_mount_point(const char *name, const char *table) +struct mntent* FAST_FUNC find_mount_point(const char *name) { struct stat s; dev_t mountDevice; @@ -25,27 +25,35 @@ struct mntent* FAST_FUNC find_mount_point(const char *name, const char *table) struct mntent *mountEntry; if (stat(name, &s) != 0) - return 0; + return NULL; - if ((s.st_mode & S_IFMT) == S_IFBLK) + if (S_ISBLK(s.st_mode)) mountDevice = s.st_rdev; else mountDevice = s.st_dev; - mountTable = setmntent(table ? table : bb_path_mtab_file, "r"); + mountTable = setmntent(bb_path_mtab_file, "r"); if (!mountTable) return 0; - while ((mountEntry = getmntent(mountTable)) != 0) { + while ((mountEntry = getmntent(mountTable)) != NULL) { + /* rootfs mount in Linux 2.6 exists always, + * and it makes sense to always ignore it. + * Otherwise people can't reference their "real" root! */ + if (strcmp(mountEntry->mnt_fsname, "rootfs") == 0) + continue; + if (strcmp(name, mountEntry->mnt_dir) == 0 || strcmp(name, mountEntry->mnt_fsname) == 0 ) { /* String match. */ break; } - if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) /* Match the device. */ + /* Match the device. */ + if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) break; - if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) /* Match the directory's mount point. */ + /* Match the directory's mount point. */ + if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) break; } endmntent(mountTable); |