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-rw-r--r--util-linux/mount.c681
1 files changed, 292 insertions, 389 deletions
diff --git a/util-linux/mount.c b/util-linux/mount.c
index b059d7094..924d79d69 100644
--- a/util-linux/mount.c
+++ b/util-linux/mount.c
@@ -4,6 +4,7 @@
4 * 4 *
5 * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>. 5 * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
6 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> 6 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
7 * Copyright (C) 2005 by Rob Landley <rob@landley.net>
7 * 8 *
8 * This program is free software; you can redistribute it and/or modify 9 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by 10 * it under the terms of the GNU General Public License as published by
@@ -19,29 +20,6 @@
19 * along with this program; if not, write to the Free Software 20 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 * 22 *
22 * 3/21/1999 Charles P. Wright <cpwright@cpwright.com>
23 * searches through fstab when -a is passed
24 * will try mounting stuff with all fses when passed -t auto
25 *
26 * 1999-04-17 Dave Cinege...Rewrote -t auto. Fixed ro mtab.
27 *
28 * 1999-10-07 Erik Andersen <andersen@codepoet.org>.
29 * Rewrite of a lot of code. Removed mtab usage (I plan on
30 * putting it back as a compile-time option some time),
31 * major adjustments to option parsing, and some serious
32 * dieting all around.
33 *
34 * 1999-11-06 mtab support is back - andersee
35 *
36 * 2000-01-12 Ben Collins <bcollins@debian.org>, Borrowed utils-linux's
37 * mount to add loop support.
38 *
39 * 2000-04-30 Dave Cinege <dcinege@psychosis.com>
40 * Rewrote fstab while loop and lower mount section. Can now do
41 * single mounts from fstab. Can override fstab options for single
42 * mount. Common mount_one call for single mounts and 'all'. Fixed
43 * mtab updating and stale entries. Removed 'remount' default.
44 *
45 */ 23 */
46 24
47#include <limits.h> 25#include <limits.h>
@@ -52,351 +30,131 @@
52#include <stdio.h> 30#include <stdio.h>
53#include <mntent.h> 31#include <mntent.h>
54#include <ctype.h> 32#include <ctype.h>
33#include <sys/mount.h>
34#include <fcntl.h> // for CONFIG_FEATURE_MOUNT_LOOP
35#include <sys/ioctl.h> // for CONFIG_FEATURE_MOUNT_LOOP
55#include "busybox.h" 36#include "busybox.h"
56 37
57#ifdef CONFIG_NFSMOUNT 38/* This is just a warning of a common mistake. Possibly this should be a
58#if defined(__UCLIBC__) && ! defined(__UCLIBC_HAS_RPC__) 39 * uclibc faq entry rather than in busybox... */
40#if ENABLE_NFSMOUNT && defined(__UCLIBC__) && ! defined(__UCLIBC_HAS_RPC__)
59#error "You need to build uClibc with UCLIBC_HAS_RPC for busybox mount with NFS support to compile." 41#error "You need to build uClibc with UCLIBC_HAS_RPC for busybox mount with NFS support to compile."
60#endif 42#endif
61#endif
62
63enum {
64 MS_MGC_VAL = 0xc0ed0000, /* Magic number indicatng "new" flags */
65 MS_RDONLY = 1, /* Mount read-only */
66 MS_NOSUID = 2, /* Ignore suid and sgid bits */
67 MS_NODEV = 4, /* Disallow access to device special files */
68 MS_NOEXEC = 8, /* Disallow program execution */
69 MS_SYNCHRONOUS = 16, /* Writes are synced at once */
70 MS_REMOUNT = 32, /* Alter flags of a mounted FS */
71 MS_MANDLOCK = 64, /* Allow mandatory locks on an FS */
72 S_QUOTA = 128, /* Quota initialized for file/directory/symlink */
73 S_APPEND = 256, /* Append-only file */
74 S_IMMUTABLE = 512, /* Immutable file */
75 MS_NOATIME = 1024, /* Do not update access times. */
76 MS_NODIRATIME = 2048, /* Do not update directory access times */
77 MS_BIND = 4096, /* Use the new linux 2.4.x "mount --bind" feature */
78 MS_MOVE = 8192, /* Use the new linux 2.4.x "mount --move" feature */
79};
80
81 43
82#if defined CONFIG_FEATURE_MOUNT_LOOP 44// These two aren't always defined in old headers
83#include <fcntl.h> 45#ifndef MS_BIND
84#include <sys/ioctl.h> 46#define MS_BIND 4096
85static int use_loop = FALSE; 47#endif
48#ifndef MS_MOVE
49#define MS_MOVE 8192
86#endif 50#endif
87 51
88extern int mount(__const char *__special_file, __const char *__dir, 52/* Consume standard mount options (from -o options or --options).
89 __const char *__fstype, unsigned long int __rwflag, 53 * Set appropriate flags and collect unrecognized ones as a comma separated
90 __const void *__data); 54 * string to pass to kernel */
91extern int umount(__const char *__special_file);
92extern int umount2(__const char *__special_file, int __flags);
93
94extern int sysfs(int option, unsigned int fs_index, char *buf);
95 55
96struct mount_options { 56struct {
97 const char *name; 57 const char *name;
98 unsigned long and; 58 long flags;
99 unsigned long or; 59} static const mount_options[] = {
60 {"loop", 0},
61 {"defaults", 0},
62 {"noauto", 0},
63 {"ro", MS_RDONLY},
64 {"rw", ~MS_RDONLY},
65 {"nosuid", MS_NOSUID},
66 {"suid", ~MS_NOSUID},
67 {"dev", ~MS_NODEV},
68 {"nodev", MS_NODEV},
69 {"exec", ~MS_NOEXEC},
70 {"noexec", MS_NOEXEC},
71 {"sync", MS_SYNCHRONOUS},
72 {"async", ~MS_SYNCHRONOUS},
73 {"remount", MS_REMOUNT},
74 {"atime", MS_NOATIME},
75 {"noatime", MS_NOATIME},
76 {"diratime", MS_NODIRATIME},
77 {"nodiratime", MS_NODIRATIME},
78 {"bind", MS_BIND},
79 {"move", MS_MOVE}
100}; 80};
101 81
102static const struct mount_options mount_options[] = { 82/* Uses the mount_options list above */
103 {"async", ~MS_SYNCHRONOUS, 0},
104 {"atime", ~0, ~MS_NOATIME},
105 {"defaults", ~0, 0},
106 {"noauto", ~0, 0},
107 {"dev", ~MS_NODEV, 0},
108 {"diratime", ~0, ~MS_NODIRATIME},
109 {"exec", ~MS_NOEXEC, 0},
110 {"noatime", ~0, MS_NOATIME},
111 {"nodev", ~0, MS_NODEV},
112 {"nodiratime", ~0, MS_NODIRATIME},
113 {"noexec", ~0, MS_NOEXEC},
114 {"nosuid", ~0, MS_NOSUID},
115 {"remount", ~0, MS_REMOUNT},
116 {"ro", ~0, MS_RDONLY},
117 {"rw", ~MS_RDONLY, 0},
118 {"suid", ~MS_NOSUID, 0},
119 {"sync", ~0, MS_SYNCHRONOUS},
120 {"bind", ~0, MS_BIND},
121 {"move", ~0, MS_MOVE},
122 {0, 0, 0}
123};
124
125static int
126do_mount(char *specialfile, char *dir, char *filesystemtype, long flags,
127 void *string_flags, int useMtab, int fakeIt, char *mtab_opts,
128 int mount_all)
129{
130 int status = 0;
131
132#if defined CONFIG_FEATURE_MOUNT_LOOP
133 char *lofile = NULL;
134#endif
135
136 if (!fakeIt) {
137#if defined CONFIG_FEATURE_MOUNT_LOOP
138 if (use_loop == TRUE) {
139 int loro = flags & MS_RDONLY;
140
141 lofile = specialfile;
142
143 specialfile = find_unused_loop_device();
144 if (specialfile == NULL) {
145 bb_error_msg_and_die("Could not find a spare loop device");
146 }
147 if (set_loop(specialfile, lofile, 0, &loro)) {
148 bb_error_msg_and_die("Could not setup loop device");
149 }
150 if (!(flags & MS_RDONLY) && loro) { /* loop is ro, but wanted rw */
151 bb_error_msg("WARNING: loop device is read-only");
152 flags |= MS_RDONLY;
153 }
154 }
155#endif
156 status = mount(specialfile, dir, filesystemtype, flags, string_flags);
157 if (status < 0 && errno == EROFS) {
158 bb_error_msg("%s is write-protected, mounting read-only",
159 specialfile);
160 status = mount(specialfile, dir, filesystemtype, flags |=
161 MS_RDONLY, string_flags);
162 }
163 /* Don't whine about already mounted filesystems when mounting all. */
164 if (status < 0 && errno == EBUSY && mount_all) {
165 return TRUE;
166 }
167 }
168
169
170 /* If the mount was sucessful, do anything needed, then return TRUE */
171 if (status == 0 || fakeIt == TRUE) {
172
173#if defined CONFIG_FEATURE_MTAB_SUPPORT
174 if (useMtab) {
175 erase_mtab(specialfile); /* Clean any stale entries */
176 write_mtab(specialfile, dir, filesystemtype, flags, mtab_opts);
177 }
178#endif
179 return (TRUE);
180 }
181
182 /* Bummer. mount failed. Clean up */
183#if defined CONFIG_FEATURE_MOUNT_LOOP
184 if (lofile != NULL) {
185 del_loop(specialfile);
186 }
187#endif
188
189 if (errno == EPERM) {
190 bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
191 }
192
193 return (FALSE);
194}
195
196
197static void paste_str(char **s1, const char *s2)
198{
199 *s1 = xrealloc(*s1, strlen(*s1) + strlen(s2) + 1);
200 strcat(*s1, s2);
201}
202
203/* Seperate standard mount options from the nonstandard string options */
204static void parse_mount_options(char *options, int *flags, char **strflags) 83static void parse_mount_options(char *options, int *flags, char **strflags)
205{ 84{
206 while (options) { 85 // Loop through options
207 int gotone = FALSE; 86 for(;;) {
87 int i;
208 char *comma = strchr(options, ','); 88 char *comma = strchr(options, ',');
209 const struct mount_options *f = mount_options;
210 89
211 if (comma) { 90 if(comma) *comma = 0;
212 *comma = '\0';
213 }
214
215 while (f->name != 0) {
216 if (strcasecmp(f->name, options) == 0) {
217 91
218 *flags &= f->and; 92 // Find this option in mount_options
219 *flags |= f->or; 93 for(i = 0; i < (sizeof(mount_options) / sizeof(*mount_options)); i++) {
220 gotone = TRUE; 94 if(!strcasecmp(mount_options[i].name, options)) {
95 long fl = mount_options[i].flags;
96 if(fl < 0) *flags &= fl;
97 else *flags |= fl;
221 break; 98 break;
222 } 99 }
223 f++;
224 }
225#if defined CONFIG_FEATURE_MOUNT_LOOP
226 if (!strcasecmp("loop", options)) { /* loop device support */
227 use_loop = TRUE;
228 gotone = TRUE;
229 } 100 }
230#endif 101 // Unrecognized mount option?
231 if (!gotone) { 102 if(i == sizeof(mount_options)) {
232 if (**strflags) { 103 // Add it to strflags, to pass on to kernel
233 /* have previous parsed options */ 104 i = *strflags ? strlen(*strflags) : 0;
234 paste_str(strflags, ","); 105 *strflags = xrealloc(*strflags, i+strlen(options)+2);
235 } 106 // Comma separated if it's not the first one
236 paste_str(strflags, options); 107 if(i) (*strflags)[i] = ',';
108 strcpy((*strflags)+i, options);
237 } 109 }
238 if (comma) { 110 // Advance to next option, or finish
111 if(comma) {
239 *comma = ','; 112 *comma = ',';
240 options = ++comma; 113 options = ++comma;
241 } else { 114 } else break;
242 break;
243 }
244 } 115 }
245} 116}
246 117
247static int mount_one(char *blockDevice, char *directory, char *filesystemType, 118/* This does the work */
248 unsigned long flags, char *string_flags, int useMtab,
249 int fakeIt, char *mtab_opts, int whineOnErrors,
250 int mount_all)
251{
252 int status = 0;
253 if (strcmp(filesystemType, "auto") == 0) {
254 char buf[255];
255 FILE *f;
256 int read_proc = 0;
257
258 f = fopen("/etc/filesystems", "r");
259
260 if (f) {
261 while (fgets(buf, sizeof(buf), f)) {
262 if (*buf == '*') {
263 read_proc = 1;
264 } else if (*buf == '#') {
265 continue;
266 } else {
267 filesystemType = buf;
268
269 /* Add NULL termination to each line */
270 while (*filesystemType && !isspace(*filesystemType)) {
271 filesystemType++;
272 }
273 *filesystemType = '\0';
274
275 filesystemType = buf;
276
277 if (bb_strlen(filesystemType)) {
278 status = do_mount(blockDevice, directory, filesystemType,
279 flags | MS_MGC_VAL, string_flags,
280 useMtab, fakeIt, mtab_opts, mount_all);
281 if (status) {
282 break;
283 }
284 }
285
286 }
287 }
288 fclose(f);
289 } else {
290 read_proc = 1;
291 }
292
293 if (read_proc && !status) {
294
295 f = bb_xfopen("/proc/filesystems", "r");
296 119
297 while (fgets(buf, sizeof(buf), f) != NULL) { 120extern int mount_main(int argc, char **argv)
298 filesystemType = buf;
299 if (*filesystemType == '\t') { /* Not a nodev filesystem */
300
301 /* Add NULL termination to each line */
302 while (*filesystemType && *filesystemType != '\n') {
303 filesystemType++;
304 }
305 *filesystemType = '\0';
306
307 filesystemType = buf;
308 filesystemType++; /* hop past tab */
309
310 status = do_mount(blockDevice, directory, filesystemType,
311 flags | MS_MGC_VAL, string_flags, useMtab,
312 fakeIt, mtab_opts, mount_all);
313 if (status) {
314 break;
315 }
316 }
317 }
318 fclose(f);
319 }
320 } else {
321 status = do_mount(blockDevice, directory, filesystemType,
322 flags | MS_MGC_VAL, string_flags, useMtab, fakeIt,
323 mtab_opts, mount_all);
324 }
325
326 if (!status) {
327 if (whineOnErrors) {
328 bb_perror_msg("Mounting %s on %s failed", blockDevice, directory);
329 }
330 return (FALSE);
331 }
332 return (TRUE);
333}
334
335static void show_mounts(char *onlytype)
336{ 121{
337 FILE *mountTable = setmntent(bb_path_mtab_file, "r"); 122 char *string_flags = 0, *fsType = 0, *blockDevice = 0, *directory = 0,
338 123 *loopFile = 0, *buf = 0,
339 if (mountTable) { 124 *files[] = {"/etc/filesystems", "/proc/filesystems", 0};
340 struct mntent *m; 125 int i, opt, all = FALSE, fakeIt = FALSE, allowWrite = FALSE,
126 rc = EXIT_FAILURE, useMtab = ENABLE_FEATURE_MTAB_SUPPORT;
127 int flags=0xc0ed0000; // Needed for linux 2.2, ignored by 2.4 and 2.6.
128 FILE *file = 0,*f = 0;
129 char path[PATH_MAX*2];
130 struct mntent m;
131 struct stat statbuf;
341 132
342 while ((m = getmntent(mountTable)) != 0) { 133 /* parse long options, like --bind and --move. Note that -o option
343 char *blockDevice = m->mnt_fsname; 134 * and --option are synonymous. Yes, this means --remount,rw works. */
344 135
345 if (strcmp(blockDevice, "rootfs") == 0) { 136 for(i = opt = 0; i < argc; i++) {
346 continue; 137 if(argv[i][0] == '-' && argv[i][1] == '-')
347 } else if (strcmp(blockDevice, "/dev/root") == 0) { 138 parse_mount_options(argv[i]+2, &flags, &string_flags);
348 blockDevice = find_real_root_device_name(); 139 else argv[opt++] = argv[i];
349 }
350 if (!onlytype || (strcmp(m->mnt_type, onlytype) == 0)) {
351 printf("%s on %s type %s (%s)\n", blockDevice, m->mnt_dir,
352 m->mnt_type, m->mnt_opts);
353 }
354#ifdef CONFIG_FEATURE_CLEAN_UP
355 if (blockDevice != m->mnt_fsname) {
356 free(blockDevice);
357 }
358#endif
359 }
360 endmntent(mountTable);
361 } else {
362 bb_perror_msg_and_die(bb_path_mtab_file);
363 } 140 }
364 exit(EXIT_SUCCESS); 141 argc = opt;
365}
366 142
367extern int mount_main(int argc, char **argv) 143 // Parse remaining options
368{ 144
369 struct stat statbuf; 145 while((opt = getopt(argc, argv, "o:t:rwafnv")) > 0) {
370 char *string_flags = bb_xstrdup("");
371 char *extra_opts;
372 int flags = 0;
373 char *filesystemType = "auto";
374 int got_filesystemType = 0;
375 char *device = xmalloc(PATH_MAX);
376 char *directory = xmalloc(PATH_MAX);
377 struct mntent *m = NULL;
378 int all = FALSE;
379 int fakeIt = FALSE;
380 int useMtab = TRUE;
381 int rc = EXIT_FAILURE;
382 FILE *f = 0;
383 int opt;
384
385 /* Parse options */
386 while ((opt = getopt(argc, argv, "o:rt:wafnv")) > 0) {
387 switch (opt) { 146 switch (opt) {
388 case 'o': 147 case 'o':
389 parse_mount_options(optarg, &flags, &string_flags); 148 parse_mount_options(optarg, &flags, &string_flags);
390 break; 149 break;
150 case 't':
151 fsType = optarg;
152 break;
391 case 'r': 153 case 'r':
392 flags |= MS_RDONLY; 154 flags |= MS_RDONLY;
393 break; 155 break;
394 case 't':
395 filesystemType = optarg;
396 got_filesystemType = 1;
397 break;
398 case 'w': 156 case 'w':
399 flags &= ~MS_RDONLY; 157 allowWrite=TRUE;
400 break; 158 break;
401 case 'a': 159 case 'a':
402 all = TRUE; 160 all = TRUE;
@@ -405,93 +163,238 @@ extern int mount_main(int argc, char **argv)
405 fakeIt = TRUE; 163 fakeIt = TRUE;
406 break; 164 break;
407 case 'n': 165 case 'n':
408#ifdef CONFIG_FEATURE_MTAB_SUPPORT
409 useMtab = FALSE; 166 useMtab = FALSE;
410#endif
411 break; 167 break;
412 case 'v': 168 case 'v':
413 break; /* ignore -v */ 169 break; // ignore -v
170 default:
171 bb_show_usage();
414 } 172 }
415 } 173 }
416 174
417 if (!all && (optind == argc)) { 175 // If we have no arguments, show currently mounted filesystems
418 show_mounts(got_filesystemType ? filesystemType : NULL);
419 }
420 176
421 if (optind < argc) { 177 if(!all && (optind == argc)) {
422 /* if device is a filename get its real path */ 178 FILE *mountTable = setmntent(bb_path_mtab_file, "r");
423 if (stat(argv[optind], &statbuf) == 0) {
424 char *tmp = bb_simplify_path(argv[optind]);
425 179
426 safe_strncpy(device, tmp, PATH_MAX); 180 if(!mountTable) bb_perror_msg_and_die(bb_path_mtab_file);
427 } else { 181
428 safe_strncpy(device, argv[optind], PATH_MAX); 182 while (getmntent_r(mountTable,&m,path,sizeof(path))) {
183 blockDevice = m.mnt_fsname;
184
185 // Clean up display a little bit regarding root devie
186 if(!strcmp(blockDevice, "rootfs")) continue;
187 if(!strcmp(blockDevice, "/dev/root"))
188 blockDevice = find_block_device("/");
189
190 if(!fsType || !strcmp(m.mnt_type, fsType))
191 printf("%s on %s type %s (%s)\n", blockDevice, m.mnt_dir,
192 m.mnt_type, m.mnt_opts);
193 if(ENABLE_FEATURE_CLEAN_UP && blockDevice != m.mnt_fsname)
194 free(blockDevice);
429 } 195 }
196 endmntent(mountTable);
197 return EXIT_SUCCESS;
430 } 198 }
431 199
432 if (optind + 1 < argc) 200 /* The next argument is what to mount. if there's an argument after that
433 directory = bb_simplify_path(argv[optind + 1]); 201 * it's where to mount it. If we're not mounting all, and we have both
202 * of these arguments, jump straight to the actual mount. */
203
204 statbuf.st_mode=0;
205 if(optind < argc)
206 blockDevice = !stat(argv[optind], &statbuf) ?
207 bb_simplify_path(argv[optind]) :
208 (ENABLE_FEATURE_CLEAN_UP ? strdup(argv[optind]) : argv[optind]);
209 if(optind+1 < argc) directory = bb_simplify_path(argv[optind+1]);
210
211 // If we don't have to loop through fstab, skip ahead a bit.
212
213 if(!all && optind+1!=argc) goto singlemount;
214
215 // Loop through /etc/fstab entries to look up this entry.
434 216
435 if (all || optind + 1 == argc) { 217 if(!(file=setmntent("/etc/fstab","r")))
436 f = setmntent("/etc/fstab", "r"); 218 bb_perror_msg_and_die("\nCannot read /etc/fstab");
219 for(;;) {
437 220
438 if (f == NULL) 221 // Get next fstab entry
439 bb_perror_msg_and_die("\nCannot read /etc/fstab");
440 222
441 while ((m = getmntent(f)) != NULL) { 223 if(!getmntent_r(file,&m,path,sizeof(path))) {
442 if (!all && (optind + 1 == argc) 224 if(!all)
443 && ((strcmp(device, m->mnt_fsname) != 0) 225 bb_perror_msg("Can't find %s in /etc/fstab\n", blockDevice);
444 && (strcmp(device, m->mnt_dir) != 0))) { 226 break;
227 }
228
229 // If we're mounting all and all doesn't mount this one, skip it.
230
231 if(all) {
232 if(strstr(m.mnt_opts,"noauto") || strstr(m.mnt_type,"swap"))
445 continue; 233 continue;
234 flags=0;
235
236 /* If we're mounting something specific and this isn't it, skip it.
237 * Note we must match both the exact text in fstab (ala "proc") or
238 * a full path from root */
239
240 } else if(strcmp(blockDevice,m.mnt_fsname) &&
241 strcmp(argv[optind],m.mnt_fsname) &&
242 strcmp(blockDevice,m.mnt_dir) &&
243 strcmp(argv[optind],m.mnt_dir)) continue;
244
245 /* Parse flags from /etc/fstab (unless this is a single mount
246 * overriding fstab -- note the "all" test above zeroed the flags,
247 * to prevent flags from previous entries affecting this one, so
248 * the only way we could get here with nonzero flags is a single
249 * mount). */
250
251 if(!flags) {
252 if(ENABLE_FEATURE_CLEAN_UP) free(string_flags);
253 string_flags=NULL;
254 parse_mount_options(m.mnt_opts, &flags, &string_flags);
255 }
256
257 /* Fill out remaining fields with info from mtab */
258
259 if(ENABLE_FEATURE_CLEAN_UP) {
260 free(blockDevice);
261 blockDevice=strdup(m.mnt_fsname);
262 free(directory);
263 directory=strdup(m.mnt_type);
264 } else {
265 blockDevice=m.mnt_fsname;
266 directory=m.mnt_dir;
267 }
268 fsType=m.mnt_type;
269
270 /* Ok, we're ready to actually mount a specific source on a specific
271 * directory now. */
272
273singlemount:
274
275 // If they said -w, override fstab
276
277 if(allowWrite) flags&=~MS_RDONLY;
278
279 // Might this be an NFS filesystem?
280
281 if(ENABLE_NFSMOUNT && (!fsType || !strcmp(fsType,"nfs")) &&
282 strchr(blockDevice, ':') != NULL)
283 {
284 if(nfsmount(blockDevice, directory, &flags, &string_flags, 1))
285 bb_perror_msg("nfsmount failed");
286 else {
287 rc=EXIT_SUCCESS;
288 fsType="nfs";
446 } 289 }
290 } else {
291
292 // Do we need to allocate a loopback device?
447 293
448 if (all && ( /* If we're mounting 'all' */ 294 if(ENABLE_FEATURE_MOUNT_LOOP && !fakeIt && S_ISREG(statbuf.st_mode))
449 (strstr(m->mnt_opts, "noauto")) || /* and the file system isn't noauto, */
450 (strstr(m->mnt_type, "swap")))) /* and isn't swap, then mount it */
451 { 295 {
452 continue; 296 loopFile = blockDevice;
297 blockDevice = 0;
298 switch(set_loop(&blockDevice, loopFile, 0)) {
299 case 0:
300 case 1:
301 break;
302 default:
303 bb_error_msg_and_die(
304 errno == EPERM || errno == EACCES ?
305 bb_msg_perm_denied_are_you_root :
306 "Couldn't setup loop device");
307 break;
308 }
453 } 309 }
454 310
455 if (all || flags == 0) { /* Allow single mount to override fstab flags */ 311 /* If we know the fstype (or don't need to), jump straight
456 flags = 0; 312 * to the actual mount. */
457 string_flags[0] = 0;
458 parse_mount_options(m->mnt_opts, &flags, &string_flags);
459 }
460 313
461 strcpy(device, m->mnt_fsname); 314 if(fsType || (flags & (MS_REMOUNT | MS_BIND | MS_MOVE)))
462 strcpy(directory, m->mnt_dir); 315 goto mount_it_now;
463 filesystemType = bb_xstrdup(m->mnt_type); 316 }
464 singlemount: 317
465 extra_opts = string_flags; 318 // Loop through filesystem types until mount succeeds or we run out
466 rc = EXIT_SUCCESS; 319
467#ifdef CONFIG_NFSMOUNT 320 for(i = 0; files[i] && rc; i++) {
468 if (strchr(device, ':') != NULL) { 321 f = fopen(files[i], "r");
469 filesystemType = "nfs"; 322 if(!f) continue;
470 if (nfsmount 323 // Get next block device backed filesystem
471 (device, directory, &flags, &extra_opts, &string_flags, 324 for(buf = 0; (buf = fsType = bb_get_chomped_line_from_file(f));
472 1)) { 325 free(buf))
473 bb_perror_msg("nfsmount failed"); 326 {
474 rc = EXIT_FAILURE; 327 // Skip funky entries in /proc
328 if(!strncmp(buf,"nodev",5) && isspace(buf[5])) continue;
329
330 while(isspace(*fsType)) fsType++;
331 if(*buf=='#' || *buf=='*') continue;
332 if(!*fsType) continue;
333mount_it_now:
334 // Okay, try to mount
335
336 if (!fakeIt) {
337 for(;;) {
338 rc = mount(blockDevice, directory, fsType, flags, string_flags);
339 if(!rc || (flags&MS_RDONLY) || (errno!=EACCES && errno!=EROFS))
340 break;
341 bb_error_msg("%s is write-protected, mounting read-only", blockDevice);
342 flags|=MS_RDONLY;
343 }
475 } 344 }
345 if(!rc) break;
476 } 346 }
477#endif 347 if(f) fclose(f);
478 if (!mount_one 348 if(!f || !rc) break;
479 (device, directory, filesystemType, flags, string_flags, 349 }
480 useMtab, fakeIt, extra_opts, TRUE, all)) { 350
481 rc = EXIT_FAILURE; 351 /* If the mount was sucessful, and we're maintaining an old-style
352 * mtab file by hand, add new entry to it now. */
353 if((!rc || fakeIt) && useMtab) {
354 FILE *mountTable = setmntent(bb_path_mtab_file, "a+");
355
356 if(!mountTable) bb_perror_msg(bb_path_mtab_file);
357 else {
358 // Remove trailing / (if any) from directory we mounted on
359 int length=strlen(directory);
360 if(length>1 && directory[length-1] == '/')
361 directory[length-1]=0;
362
363 // Fill out structure (should be ok to re-use existing one).
364 m.mnt_fsname=blockDevice;
365 m.mnt_dir=directory;
366 m.mnt_type=fsType ? : "--bind";
367 m.mnt_opts=string_flags ? :
368 ((flags & MS_RDONLY) ? "ro" : "rw");
369 m.mnt_freq = 0;
370 m.mnt_passno = 0;
371
372 // Write and close
373 addmntent(mountTable, &m);
374 endmntent(mountTable);
482 } 375 }
483 if (!all) { 376 } else {
484 break; 377 // Mount failed. Clean up
378 if(loopFile) {
379 del_loop(blockDevice);
380 if(ENABLE_FEATURE_CLEAN_UP) free(loopFile);
485 } 381 }
382 // Don't whine about already mounted fs when mounting all.
383 if(rc<0 && errno == EBUSY && all) rc=0;
384 else if (errno == EPERM)
385 bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
486 } 386 }
487 if (f) { 387 // We couldn't free this earlier becase fsType could be in buf.
488 endmntent(f); 388 if(ENABLE_FEATURE_CLEAN_UP) {
389 free(buf);
390 free(blockDevice);
391 free(directory);
489 } 392 }
490 if (!all && f && m == NULL) { 393 if(!all) break;
491 fprintf(stderr, "Can't find %s in /etc/fstab\n", device);
492 }
493 return rc;
494 } 394 }
495 395
496 goto singlemount; 396 if(file) endmntent(file);
397 if(rc) bb_perror_msg("Mounting %s on %s failed", blockDevice, directory);
398
399 return rc ? : EXIT_FAILURE;
497} 400}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-15 11:50:09 +0000