diff options
| -rw-r--r-- | util-linux/umount.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/util-linux/umount.c b/util-linux/umount.c index 24c1d03..fabc3d0 100644 --- a/util-linux/umount.c +++ b/util-linux/umount.c @@ -78,6 +78,7 @@ int umount_main(int argc, char **argv) // Loop through everything we're supposed to umount, and do so. for (;;) { int curstat; + char *zapit = *argv; // Do we already know what to umount this time through the loop? if (m) safe_strncpy(path, m->dir, PATH_MAX); @@ -86,32 +87,37 @@ int umount_main(int argc, char **argv) // Get next command line argument (and look it up in mtab list) else if (!argc--) break; else { - realpath(*argv++, path); + argv++; + realpath(zapit, path); for (m = mtl; m; m = m->next) if (!strcmp(path, m->dir) || !strcmp(path, m->device)) break; } + // If we couldn't find this sucker in /etc/mtab, punt by passing our + // command line argument straight to the umount syscall. Otherwise, + // umount the directory even if we were given the block device. + if (m) zapit = m->dir; // Let's ask the thing nicely to unmount. - curstat = umount(path); + curstat = umount(zapit); // Force the unmount, if necessary. if (curstat && doForce) { - curstat = umount2(path, doForce); + curstat = umount2(zapit, doForce); if (curstat) - bb_error_msg_and_die("forced umount of %s failed!", path); + bb_error_msg_and_die("forced umount of %s failed!", zapit); } // If still can't umount, maybe remount read-only? if (curstat && (opt & OPT_REMOUNT) && errno == EBUSY && m) { - curstat = mount(m->device, path, NULL, MS_REMOUNT|MS_RDONLY, NULL); + curstat = mount(m->device, zapit, NULL, MS_REMOUNT|MS_RDONLY, NULL); bb_error_msg(curstat ? "Cannot remount %s read-only" : "%s busy - remounted read-only", m->device); } if (curstat) { status = EXIT_FAILURE; - bb_perror_msg("Couldn't umount %s", path); + bb_perror_msg("Couldn't umount %s", zapit); } else { /* De-allocate the loop device. This ioctl should be ignored on * any non-loop block devices. */ @@ -121,9 +127,9 @@ int umount_main(int argc, char **argv) erase_mtab(m->dir); } - - // Find next matching mtab entry for -a or umount /dev + // Note this means that "umount /dev/blah" will unmount all instances + // of /dev/blah, not just the most recent. while (m && (m = m->next)) if ((opt & OPT_ALL) || !strcmp(path,m->device)) break; |