source: branches/stable/mindi-busybox/libbb/mtab.c @ 821

Last change on this file since 821 was 821, checked in by bruno, 13 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)

File size: 2.2 KB
Line 
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 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#include <stdlib.h>
23#include <unistd.h>
24#include <errno.h>
25#include <string.h>
26#include <stdio.h>
27#include <mntent.h>
28#include "libbb.h"
29
30#define MTAB_MAX_ENTRIES 40
31
32#ifdef CONFIG_FEATURE_MTAB_SUPPORT
33void erase_mtab(const char *name)
34{
35    struct mntent entries[MTAB_MAX_ENTRIES];
36    int count = 0;
37    FILE *mountTable = setmntent(bb_path_mtab_file, "r");
38    struct mntent *m;
39
40    /* Check if reading the mtab file failed */
41    if (mountTable == 0
42            /* Bummer.  fall back on trying the /proc filesystem */
43            && (mountTable = setmntent("/proc/mounts", "r")) == 0) {
44        bb_perror_msg(bb_path_mtab_file);
45        return;
46    }
47
48    while (((m = getmntent(mountTable)) != 0) && (count < MTAB_MAX_ENTRIES))
49    {
50        entries[count].mnt_fsname = strdup(m->mnt_fsname);
51        entries[count].mnt_dir = strdup(m->mnt_dir);
52        entries[count].mnt_type = strdup(m->mnt_type);
53        entries[count].mnt_opts = strdup(m->mnt_opts);
54        entries[count].mnt_freq = m->mnt_freq;
55        entries[count].mnt_passno = m->mnt_passno;
56        count++;
57    }
58    endmntent(mountTable);
59    if ((mountTable = setmntent(bb_path_mtab_file, "w"))) {
60        int i;
61
62        for (i = 0; i < count; i++) {
63            int result = (strcmp(entries[i].mnt_fsname, name) == 0
64                          || strcmp(entries[i].mnt_dir, name) == 0);
65
66            if (result)
67                continue;
68            else
69                addmntent(mountTable, &entries[i]);
70        }
71        endmntent(mountTable);
72    } else if (errno != EROFS)
73        bb_perror_msg(bb_path_mtab_file);
74}
75#endif
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