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    Contents of /tags/mkinitrd-6_2_0/libbb/mtab.c

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    Revision 994 - (show annotations) (download)
    Sun May 30 11:53:18 2010 UTC (14 years ago) by niro
    File MIME type: text/plain
    File size: 1454 byte(s) 
    tagged 'mkinitrd-6_2_0'
    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
    14 void FAST_FUNC erase_mtab(const char *name)
    15 {
    16 struct mntent *entries;
    17 int i, count;
    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 entries = NULL;
    30 count = 0;
    31 while ((m = getmntent(mountTable)) != 0) {
    32 entries = xrealloc_vector(entries, 3, count);
    33 entries[count].mnt_fsname = xstrdup(m->mnt_fsname);
    34 entries[count].mnt_dir = xstrdup(m->mnt_dir);
    35 entries[count].mnt_type = xstrdup(m->mnt_type);
    36 entries[count].mnt_opts = xstrdup(m->mnt_opts);
    37 entries[count].mnt_freq = m->mnt_freq;
    38 entries[count].mnt_passno = m->mnt_passno;
    39 count++;
    40 }
    41 endmntent(mountTable);
    42
    43 //TODO: make update atomic
    44 mountTable = setmntent(bb_path_mtab_file, "w");
    45 if (mountTable) {
    46 for (i = 0; i < count; i++) {
    47 if (strcmp(entries[i].mnt_fsname, name) != 0
    48 && strcmp(entries[i].mnt_dir, name) != 0)
    49 addmntent(mountTable, &entries[i]);
    50 }
    51 endmntent(mountTable);
    52 } else if (errno != EROFS)
    53 bb_perror_msg(bb_path_mtab_file);
    54 }
    55 #endif