2 * Mini mount implementation for busybox
4 * Copyright (C) 1999 by Erik Andersen <andersee@debian.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * 3/21/1999 Charles P. Wright <cpwright@cpwright.com>
21 * searches through fstab when -a is passed
22 * will try mounting stuff with all fses when passed -t auto
24 * 1999-04-17 Dave Cinege...Rewrote -t auto. Fixed ro mtab.
25 * 1999-10-07 Erik Andersen. Removed mtab usage, major adjustments,
26 * and some serious dieting all around.
36 #include <sys/mount.h>
40 const char mount_usage[] = "Usage:\tmount [flags]\n"
41 "\tmount [flags] device directory [-o options,more-options]\n"
44 "\t-a:\tMount all file systems in fstab.\n"
45 "\t-o option:\tOne of many filesystem options, listed below.\n"
46 "\t-r:\tMount the filesystem read-only.\n"
47 "\t-t filesystem-type:\tSpecify the filesystem type.\n"
48 "\t-w:\tMount for reading and writing (default).\n"
50 "Options for use with the \"-o\" flag:\n"
51 "\tasync / sync:\tWrites are asynchronous / synchronous.\n"
52 "\tdev / nodev:\tAllow use of special device files / disallow them.\n"
53 "\texec / noexec:\tAllow use of executable files / disallow them.\n"
54 "\tsuid / nosuid:\tAllow set-user-id-root programs / disallow them.\n"
55 "\tremount: Re-mount a currently-mounted filesystem, changing its flags.\n"
56 "\tro / rw: Mount for read-only / read-write.\n"
58 "There are EVEN MORE flags that are specific to each filesystem.\n"
59 "You'll have to see the written documentation for those.\n";
61 struct mount_options {
67 static const struct mount_options mount_options[] = {
68 {"async", ~MS_SYNCHRONOUS, 0},
70 {"dev", ~MS_NODEV, 0},
71 {"exec", ~MS_NOEXEC, 0},
72 {"nodev", ~0, MS_NODEV},
73 {"noexec", ~0, MS_NOEXEC},
74 {"nosuid", ~0, MS_NOSUID},
75 {"remount", ~0, MS_REMOUNT},
76 {"ro", ~0, MS_RDONLY},
77 {"rw", ~MS_RDONLY, 0},
78 {"suid", ~MS_NOSUID, 0},
79 {"sync", ~0, MS_SYNCHRONOUS},
85 parse_mount_options ( char *options, unsigned long *flags, char *data)
87 printf("option=%s\n", options);
89 char *comma = strchr (options, ',');
90 const struct mount_options* f = mount_options;
94 printf("checking option=%s vs %s\n", options, f->name);
95 while (f->name != 0) {
96 printf("checking option=%s vs %s\n", options, f->name);
97 if (strcasecmp (f->name, options) == 0) {
105 data += strlen (data);
108 strcpy (data, options);
119 char *blockDevice, char *directory, char *filesystemType,
120 unsigned long flags, char *string_flags)
126 if (strcmp(filesystemType, "auto") == 0) {
127 FILE *f = fopen ("/proc/filesystems", "r");
132 while (fgets (buf, sizeof (buf), f) != NULL) {
133 filesystemType = buf;
134 if (*filesystemType == '\t') { // Not a nodev filesystem
136 // Add NULL termination to each line
137 while (*filesystemType && *filesystemType != '\n')
139 *filesystemType = '\0';
141 filesystemType = buf;
142 filesystemType++; // hop past tab
144 status = mount (blockDevice, directory, filesystemType,
145 flags | MS_MGC_VAL, string_flags);
152 status = mount (blockDevice, directory, filesystemType,
153 flags | MS_MGC_VAL, string_flags);
157 fprintf (stderr, "Mounting %s on %s failed: %s\n",
158 blockDevice, directory, strerror(errno));
164 extern int mount_main (int argc, char **argv)
166 char string_flags[1024]="\0";
167 unsigned long flags = 0;
168 char *filesystemType = "auto";
174 if ((mountTable = setmntent ("/proc/mounts", "r"))) {
176 while ((m = getmntent (mountTable)) != 0) {
177 char *blockDevice = m->mnt_fsname;
178 if (strcmp (blockDevice, "/dev/root") == 0)
179 blockDevice = (getfsfile ("/"))->fs_spec;
180 printf ("%s on %s type %s (%s)\n", blockDevice, m->mnt_dir,
181 m->mnt_type, m->mnt_opts);
183 endmntent (mountTable);
195 fprintf (stderr, "%s\n", mount_usage);
198 parse_mount_options (*argv, &flags, string_flags);
207 fprintf (stderr, "%s\n", mount_usage);
210 filesystemType = *argv;
223 fprintf (stderr, "%s\n", mount_usage);
233 FILE *f = setmntent ("/etc/fstab", "r");
236 perror("/etc/fstab");
239 // FIXME: Combine read routine (make new function) with unmount_all
242 while ((m = getmntent (f)) != NULL) {
243 // If the file system isn't noauto, and isn't mounted on /, mount
245 if ((!strstr (m->mnt_opts, "noauto"))
246 && (m->mnt_dir[1] != '\0') && !((m->mnt_type[0] == 's')
247 && (m->mnt_type[1] == 'w'))
248 && !((m->mnt_type[0] == 'n') && (m->mnt_type[1] == 'f'))) {
249 mount_one (m->mnt_fsname, m->mnt_dir, m->mnt_type, flags,
259 while (**argv == '-')
262 (*argv, *(argv+1), filesystemType, flags,
263 string_flags) == 0) return 0;
267 fprintf (stderr, "%s\n", mount_usage);