64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#include <mntent.h>
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#include "libbb.h"
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#define MTAB_MAX_ENTRIES 40
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#ifdef CONFIG_FEATURE_MTAB_SUPPORT
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void erase_mtab(const char *name)
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{
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struct mntent entries[MTAB_MAX_ENTRIES];
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int count = 0;
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FILE *mountTable = setmntent(bb_path_mtab_file, "r");
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struct mntent *m;
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/* Check if reading the mtab file failed */
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if (mountTable == 0
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/* Bummer. fall back on trying the /proc filesystem */
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&& (mountTable = setmntent("/proc/mounts", "r")) == 0) {
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bb_perror_msg(bb_path_mtab_file);
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return;
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}
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while (((m = getmntent(mountTable)) != 0) && (count < MTAB_MAX_ENTRIES))
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{
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entries[count].mnt_fsname = strdup(m->mnt_fsname);
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entries[count].mnt_dir = strdup(m->mnt_dir);
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entries[count].mnt_type = strdup(m->mnt_type);
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entries[count].mnt_opts = strdup(m->mnt_opts);
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entries[count].mnt_freq = m->mnt_freq;
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entries[count].mnt_passno = m->mnt_passno;
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count++;
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}
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endmntent(mountTable);
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if ((mountTable = setmntent(bb_path_mtab_file, "w"))) {
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int i;
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for (i = 0; i < count; i++) {
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int result = (strcmp(entries[i].mnt_fsname, name) == 0
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|| strcmp(entries[i].mnt_dir, name) == 0);
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if (result)
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continue;
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else
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addmntent(mountTable, &entries[i]);
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}
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endmntent(mountTable);
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} else if (errno != EROFS)
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bb_perror_msg(bb_path_mtab_file);
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}
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#endif
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