1/* vi: set sw=4 ts=4: */
2/*
3 * Utility routines.
4 *
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
6 *
7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
8 */
9
10#include <mntent.h>
11#include "libbb.h"
12
13#if ENABLE_FEATURE_MTAB_SUPPORT
14void erase_mtab(const char *name)
15{
16	struct mntent *entries = NULL;
17	int i, count = 0;
18	FILE *mountTable;
19	struct mntent *m;
20
21	mountTable = setmntent(bb_path_mtab_file, "r");
22	/* Bummer. Fall back on trying the /proc filesystem */
23	if (!mountTable) mountTable = setmntent("/proc/mounts", "r");
24	if (!mountTable) {
25		bb_perror_msg(bb_path_mtab_file);
26		return;
27	}
28
29	while ((m = getmntent(mountTable)) != 0) {
30		i = count++;
31		entries = xrealloc(entries, count * sizeof(entries[0]));
32		entries[i].mnt_fsname = xstrdup(m->mnt_fsname);
33		entries[i].mnt_dir = xstrdup(m->mnt_dir);
34		entries[i].mnt_type = xstrdup(m->mnt_type);
35		entries[i].mnt_opts = xstrdup(m->mnt_opts);
36		entries[i].mnt_freq = m->mnt_freq;
37		entries[i].mnt_passno = m->mnt_passno;
38	}
39	endmntent(mountTable);
40
41	mountTable = setmntent(bb_path_mtab_file, "w");
42	if (mountTable) {
43		for (i = 0; i < count; i++) {
44			if (strcmp(entries[i].mnt_fsname, name) != 0
45			 && strcmp(entries[i].mnt_dir, name) != 0)
46				addmntent(mountTable, &entries[i]);
47		}
48		endmntent(mountTable);
49	} else if (errno != EROFS)
50		bb_perror_msg(bb_path_mtab_file);
51}
52#endif
53