1 /* vi: set sw=4 ts=4: */
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
14 * Given a block device, find the mount table entry if that block device
17 * Given any other file (or directory), find the mount table entry for its
20 struct mntent* FAST_FUNC find_mount_point(const char *name, int subdir_too)
24 struct mntent *mountEntry;
28 if (stat(name, &s) != 0)
31 devno_of_name = s.st_dev;
33 /* Why S_ISCHR? - UBI volumes use char devices, not block */
34 if (S_ISBLK(s.st_mode) || S_ISCHR(s.st_mode)) {
35 devno_of_name = s.st_rdev;
39 mtab_fp = setmntent(bb_path_mtab_file, "r");
43 while ((mountEntry = getmntent(mtab_fp)) != NULL) {
44 /* rootfs mount in Linux 2.6 exists always,
45 * and it makes sense to always ignore it.
46 * Otherwise people can't reference their "real" root! */
47 if (ENABLE_FEATURE_SKIP_ROOTFS && strcmp(mountEntry->mnt_fsname, "rootfs") == 0)
50 if (strcmp(name, mountEntry->mnt_dir) == 0
51 || strcmp(name, mountEntry->mnt_fsname) == 0
52 ) { /* String match. */
56 if (!(subdir_too || block_dev))
59 /* Is device's dev_t == name's dev_t? */
60 if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == devno_of_name)
62 /* Match the directory's mount point. */
63 if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == devno_of_name)