60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/* 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 (12 kb)"
|
|
//config: default y
|
|
//config: select PLATFORM_LINUX
|
|
//config: select VOLUMEID
|
|
//config: help
|
|
//config: Prints the name of a filesystem with given label or UUID.
|
|
|
|
/* 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;
|
|
}
|