60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Support functions for mounting devices by label/uuid
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*
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* Copyright (C) 2006 by Jason Schoon <floydpink@gmail.com>
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* Some portions cribbed from e2fsprogs, util-linux, dosfstools
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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//config:config FINDFS
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//config: bool "findfs (11 kb)"
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//config: default y
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//config: select PLATFORM_LINUX
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//config: select VOLUMEID
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//config: help
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//config: Prints the name of a filesystem with given label or UUID.
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/* Benefits from suid root: better access to /dev/BLOCKDEVs: */
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//applet:IF_FINDFS(APPLET(findfs, BB_DIR_SBIN, BB_SUID_MAYBE))
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//kbuild:lib-$(CONFIG_FINDFS) += findfs.o
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//usage:#define findfs_trivial_usage
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//usage: "LABEL=label or UUID=uuid"
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//usage:#define findfs_full_usage "\n\n"
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//usage: "Find a filesystem device based on a label or UUID"
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//usage:
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//usage:#define findfs_example_usage
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//usage: "$ findfs LABEL=MyDevice"
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#include "libbb.h"
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#include "volume_id.h"
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int findfs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int findfs_main(int argc UNUSED_PARAM, char **argv)
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{
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char *dev = *++argv;
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if (!dev)
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bb_show_usage();
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if (is_prefixed_with(dev, "/dev/")) {
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/* Just pass any /dev/xxx name right through.
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* This might aid in some scripts being able
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* to call this unconditionally */
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dev = NULL;
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} else {
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/* Otherwise, handle LABEL=xxx and UUID=xxx,
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* fail on anything else */
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if (!resolve_mount_spec(argv))
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bb_show_usage();
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}
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if (*argv != dev) {
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puts(*argv);
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return 0;
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}
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return 1;
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}
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