source: MondoRescue/branches/2.2.5/mindi-busybox/libbb/mtab.c@ 1765

/* vi: set sw=4 ts=4: */
/*
 * Utility routines.
 *
 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

#include <mntent.h>
#include "libbb.h"

#if ENABLE_FEATURE_MTAB_SUPPORT
void erase_mtab(const char *name)
{
    struct mntent *entries = NULL;
    int i, count = 0;
    FILE *mountTable;
    struct mntent *m;

    mountTable = setmntent(bb_path_mtab_file, "r");
    /* Bummer. Fall back on trying the /proc filesystem */
    if (!mountTable) mountTable = setmntent("/proc/mounts", "r");
    if (!mountTable) {
        bb_perror_msg(bb_path_mtab_file);
        return;
    }

    while ((m = getmntent(mountTable)) != 0) {
        i = count++;
        entries = xrealloc(entries, count * sizeof(entries[0]));
        entries[i].mnt_fsname = xstrdup(m->mnt_fsname);
        entries[i].mnt_dir = xstrdup(m->mnt_dir);
        entries[i].mnt_type = xstrdup(m->mnt_type);
        entries[i].mnt_opts = xstrdup(m->mnt_opts);
        entries[i].mnt_freq = m->mnt_freq;
        entries[i].mnt_passno = m->mnt_passno;
    }
    endmntent(mountTable);

    mountTable = setmntent(bb_path_mtab_file, "w");
    if (mountTable) {
        for (i = 0; i < count; i++) {
            if (strcmp(entries[i].mnt_fsname, name) != 0
             && strcmp(entries[i].mnt_dir, name) != 0)
                addmntent(mountTable, &entries[i]);
        }
        endmntent(mountTable);
    } else if (errno != EROFS)
        bb_perror_msg(bb_path_mtab_file);
}
#endif