| [821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Utility routines.
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| 4 | *
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| 5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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| 6 | *
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| 7 | * This program is free software; you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation; either version 2 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * This program is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 15 | * General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with this program; if not, write to the Free Software
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| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 20 | */
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| 21 |
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| 22 | #include <stdlib.h>
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| 23 | #include <unistd.h>
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| 24 | #include <errno.h>
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| 25 | #include <string.h>
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| 26 | #include <stdio.h>
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| 27 | #include <mntent.h>
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| 28 | #include "libbb.h"
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| 29 |
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| 30 | #define MTAB_MAX_ENTRIES 40
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| 31 |
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| 32 | #ifdef CONFIG_FEATURE_MTAB_SUPPORT
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| 33 | void erase_mtab(const char *name)
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| 34 | {
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| 35 | struct mntent entries[MTAB_MAX_ENTRIES];
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| 36 | int count = 0;
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| 37 | FILE *mountTable = setmntent(bb_path_mtab_file, "r");
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| 38 | struct mntent *m;
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| 39 |
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| 40 | /* Check if reading the mtab file failed */
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| 41 | if (mountTable == 0
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| 42 | /* Bummer. fall back on trying the /proc filesystem */
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| 43 | && (mountTable = setmntent("/proc/mounts", "r")) == 0) {
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| 44 | bb_perror_msg(bb_path_mtab_file);
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| 45 | return;
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| 46 | }
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| 47 |
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| 48 | while (((m = getmntent(mountTable)) != 0) && (count < MTAB_MAX_ENTRIES))
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| 49 | {
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| 50 | entries[count].mnt_fsname = strdup(m->mnt_fsname);
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| 51 | entries[count].mnt_dir = strdup(m->mnt_dir);
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| 52 | entries[count].mnt_type = strdup(m->mnt_type);
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| 53 | entries[count].mnt_opts = strdup(m->mnt_opts);
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| 54 | entries[count].mnt_freq = m->mnt_freq;
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| 55 | entries[count].mnt_passno = m->mnt_passno;
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| 56 | count++;
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| 57 | }
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| 58 | endmntent(mountTable);
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| 59 | if ((mountTable = setmntent(bb_path_mtab_file, "w"))) {
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| 60 | int i;
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| 61 |
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| 62 | for (i = 0; i < count; i++) {
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| 63 | int result = (strcmp(entries[i].mnt_fsname, name) == 0
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| 64 | || strcmp(entries[i].mnt_dir, name) == 0);
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| 65 |
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| 66 | if (result)
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| 67 | continue;
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| 68 | else
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| 69 | addmntent(mountTable, &entries[i]);
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| 70 | }
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| 71 | endmntent(mountTable);
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| 72 | } else if (errno != EROFS)
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| 73 | bb_perror_msg(bb_path_mtab_file);
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| 74 | }
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| 75 | #endif
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