blob: 49e8979acf0b85b2120fa174f672b4baa6e4bdab
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Support functions for mounting devices by label/uuid |
4 | * |
5 | * Copyright (C) 2006 by Jason Schoon <floydpink@gmail.com> |
6 | * Some portions cribbed from e2fsprogs, util-linux, dosfstools |
7 | * |
8 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
9 | */ |
10 | |
11 | //usage:#define findfs_trivial_usage |
12 | //usage: "LABEL=label or UUID=uuid" |
13 | //usage:#define findfs_full_usage "\n\n" |
14 | //usage: "Find a filesystem device based on a label or UUID" |
15 | //usage: |
16 | //usage:#define findfs_example_usage |
17 | //usage: "$ findfs LABEL=MyDevice" |
18 | |
19 | #include "libbb.h" |
20 | #include "volume_id.h" |
21 | |
22 | int findfs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
23 | int findfs_main(int argc UNUSED_PARAM, char **argv) |
24 | { |
25 | char *dev = *++argv; |
26 | |
27 | if (!dev) |
28 | bb_show_usage(); |
29 | |
30 | if (strncmp(dev, "/dev/", 5) == 0) { |
31 | /* Just pass any /dev/xxx name right through. |
32 | * This might aid in some scripts being able |
33 | * to call this unconditionally */ |
34 | dev = NULL; |
35 | } else { |
36 | /* Otherwise, handle LABEL=xxx and UUID=xxx, |
37 | * fail on anything else */ |
38 | if (!resolve_mount_spec(argv)) |
39 | bb_show_usage(); |
40 | } |
41 | |
42 | if (*argv != dev) { |
43 | puts(*argv); |
44 | return 0; |
45 | } |
46 | return 1; |
47 | } |
48 |