1 /* vi: set sw=4 ts=4: */
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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.
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.
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
30 #define MTAB_MAX_ENTRIES 40
31 static const int MS_RDONLY = 1; /* Mount read-only. */
33 void erase_mtab(const char *name)
35 struct mntent entries[MTAB_MAX_ENTRIES];
37 FILE *mountTable = setmntent(bb_path_mtab_file, "r");
40 /* Check if reading the mtab file failed */
42 /* Bummer. fall back on trying the /proc filesystem */
43 && (mountTable = setmntent("/proc/mounts", "r")) == 0) {
44 bb_perror_msg(bb_path_mtab_file);
48 while (((m = getmntent(mountTable)) != 0) && (count < MTAB_MAX_ENTRIES))
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;
58 endmntent(mountTable);
59 if ((mountTable = setmntent(bb_path_mtab_file, "w"))) {
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);
69 addmntent(mountTable, &entries[i]);
71 endmntent(mountTable);
72 } else if (errno != EROFS)
73 bb_perror_msg(bb_path_mtab_file);
76 void write_mtab(char *blockDevice, char *directory,
77 char *filesystemType, long flags, char *string_flags)
79 FILE *mountTable = setmntent(bb_path_mtab_file, "a+");
82 if (mountTable == 0) {
83 bb_perror_msg(bb_path_mtab_file);
87 int length = strlen(directory);
89 if (length > 1 && directory[length - 1] == '/')
90 directory[length - 1] = '\0';
92 if (filesystemType == 0) {
93 struct mntent *p = find_mount_point(blockDevice, "/proc/mounts");
96 filesystemType = p->mnt_type;
98 m.mnt_fsname = blockDevice;
99 m.mnt_dir = directory;
100 m.mnt_type = filesystemType ? filesystemType : "default";
103 m.mnt_opts = string_flags;
105 if ((flags | MS_RDONLY) == flags)
113 addmntent(mountTable, &m);
114 endmntent(mountTable);