| /* vi: set sw=4 ts=4: */ |
| /* |
| * Support functions for mounting devices by label/uuid |
| * |
| * Copyright (C) 2006 by Jason Schoon <floydpink@gmail.com> |
| * Some portions cribbed from e2fsprogs, util-linux, dosfstools |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| */ |
| //config:config FINDFS |
| //config: bool "findfs" |
| //config: default y |
| //config: select PLATFORM_LINUX |
| //config: select VOLUMEID |
| //config: help |
| //config: Prints the name of a filesystem with given label or UUID. |
| //config: WARNING: |
| //config: With all submodules selected, it will add ~8k to busybox. |
| |
| /* Benefits from suid root: better access to /dev/BLOCKDEVs: */ |
| //applet:IF_FINDFS(APPLET(findfs, BB_DIR_SBIN, BB_SUID_MAYBE)) |
| |
| //kbuild:lib-$(CONFIG_FINDFS) += findfs.o |
| |
| //usage:#define findfs_trivial_usage |
| //usage: "LABEL=label or UUID=uuid" |
| //usage:#define findfs_full_usage "\n\n" |
| //usage: "Find a filesystem device based on a label or UUID" |
| //usage: |
| //usage:#define findfs_example_usage |
| //usage: "$ findfs LABEL=MyDevice" |
| |
| #include "libbb.h" |
| #include "volume_id.h" |
| |
| int findfs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int findfs_main(int argc UNUSED_PARAM, char **argv) |
| { |
| char *dev = *++argv; |
| |
| if (!dev) |
| bb_show_usage(); |
| |
| if (is_prefixed_with(dev, "/dev/")) { |
| /* Just pass any /dev/xxx name right through. |
| * This might aid in some scripts being able |
| * to call this unconditionally */ |
| dev = NULL; |
| } else { |
| /* Otherwise, handle LABEL=xxx and UUID=xxx, |
| * fail on anything else */ |
| if (!resolve_mount_spec(argv)) |
| bb_show_usage(); |
| } |
| |
| if (*argv != dev) { |
| puts(*argv); |
| return 0; |
| } |
| return 1; |
| } |