Annotation of /trunk/mkinitrd-magellan/busybox/util-linux/mount.c
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Sat Sep 1 22:45:15 2007 UTC (16 years, 9 months ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (16 years, 9 months ago) by niro
File MIME type: text/plain
File size: 42124 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
1 | niro | 532 | /* vi: set sw=4 ts=4: */ |
2 | /* | ||
3 | * Mini mount implementation for busybox | ||
4 | * | ||
5 | * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>. | ||
6 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> | ||
7 | * Copyright (C) 2005-2006 by Rob Landley <rob@landley.net> | ||
8 | * | ||
9 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. | ||
10 | */ | ||
11 | |||
12 | /* Design notes: There is no spec for mount. Remind me to write one. | ||
13 | |||
14 | mount_main() calls singlemount() which calls mount_it_now(). | ||
15 | |||
16 | mount_main() can loop through /etc/fstab for mount -a | ||
17 | singlemount() can loop through /etc/filesystems for fstype detection. | ||
18 | mount_it_now() does the actual mount. | ||
19 | */ | ||
20 | |||
21 | #include "busybox.h" | ||
22 | #include <mntent.h> | ||
23 | |||
24 | /* Needed for nfs support only... */ | ||
25 | #include <syslog.h> | ||
26 | #include <sys/utsname.h> | ||
27 | #undef TRUE | ||
28 | #undef FALSE | ||
29 | #include <rpc/rpc.h> | ||
30 | #include <rpc/pmap_prot.h> | ||
31 | #include <rpc/pmap_clnt.h> | ||
32 | |||
33 | |||
34 | #if defined(__dietlibc__) | ||
35 | /* 16.12.2006, Sampo Kellomaki (sampo@iki.fi) | ||
36 | * dietlibc-0.30 does not have implementation of getmntent_r() */ | ||
37 | /* OTOH: why we use getmntent_r instead of getmntent? TODO... */ | ||
38 | struct mntent *getmntent_r(FILE* stream, struct mntent* result, char* buffer, int bufsize) | ||
39 | { | ||
40 | /* *** XXX FIXME WARNING: This hack is NOT thread safe. --Sampo */ | ||
41 | struct mntent* ment = getmntent(stream); | ||
42 | memcpy(result, ment, sizeof(struct mntent)); | ||
43 | return result; | ||
44 | } | ||
45 | #endif | ||
46 | |||
47 | |||
48 | // Not real flags, but we want to be able to check for this. | ||
49 | enum { | ||
50 | MOUNT_USERS = (1<<28)*ENABLE_DESKTOP, | ||
51 | MOUNT_NOAUTO = (1<<29), | ||
52 | MOUNT_SWAP = (1<<30), | ||
53 | }; | ||
54 | // TODO: more "user" flag compatibility. | ||
55 | // "user" option (from mount manpage): | ||
56 | // Only the user that mounted a filesystem can unmount it again. | ||
57 | // If any user should be able to unmount, then use users instead of user | ||
58 | // in the fstab line. The owner option is similar to the user option, | ||
59 | // with the restriction that the user must be the owner of the special file. | ||
60 | // This may be useful e.g. for /dev/fd if a login script makes | ||
61 | // the console user owner of this device. | ||
62 | |||
63 | /* Standard mount options (from -o options or --options), with corresponding | ||
64 | * flags */ | ||
65 | |||
66 | struct { | ||
67 | char *name; | ||
68 | long flags; | ||
69 | } static mount_options[] = { | ||
70 | // MS_FLAGS set a bit. ~MS_FLAGS disable that bit. 0 flags are NOPs. | ||
71 | |||
72 | USE_FEATURE_MOUNT_LOOP( | ||
73 | {"loop", 0}, | ||
74 | ) | ||
75 | |||
76 | USE_FEATURE_MOUNT_FSTAB( | ||
77 | {"defaults", 0}, | ||
78 | /* {"quiet", 0}, - do not filter out, vfat wants to see it */ | ||
79 | {"noauto", MOUNT_NOAUTO}, | ||
80 | {"swap", MOUNT_SWAP}, | ||
81 | USE_DESKTOP({"user", MOUNT_USERS},) | ||
82 | USE_DESKTOP({"users", MOUNT_USERS},) | ||
83 | ) | ||
84 | |||
85 | USE_FEATURE_MOUNT_FLAGS( | ||
86 | // vfs flags | ||
87 | {"nosuid", MS_NOSUID}, | ||
88 | {"suid", ~MS_NOSUID}, | ||
89 | {"dev", ~MS_NODEV}, | ||
90 | {"nodev", MS_NODEV}, | ||
91 | {"exec", ~MS_NOEXEC}, | ||
92 | {"noexec", MS_NOEXEC}, | ||
93 | {"sync", MS_SYNCHRONOUS}, | ||
94 | {"async", ~MS_SYNCHRONOUS}, | ||
95 | {"atime", ~MS_NOATIME}, | ||
96 | {"noatime", MS_NOATIME}, | ||
97 | {"diratime", ~MS_NODIRATIME}, | ||
98 | {"nodiratime", MS_NODIRATIME}, | ||
99 | {"loud", ~MS_SILENT}, | ||
100 | |||
101 | // action flags | ||
102 | |||
103 | {"bind", MS_BIND}, | ||
104 | {"move", MS_MOVE}, | ||
105 | {"shared", MS_SHARED}, | ||
106 | {"slave", MS_SLAVE}, | ||
107 | {"private", MS_PRIVATE}, | ||
108 | {"unbindable", MS_UNBINDABLE}, | ||
109 | {"rshared", MS_SHARED|MS_RECURSIVE}, | ||
110 | {"rslave", MS_SLAVE|MS_RECURSIVE}, | ||
111 | {"rprivate", MS_SLAVE|MS_RECURSIVE}, | ||
112 | {"runbindable", MS_UNBINDABLE|MS_RECURSIVE}, | ||
113 | ) | ||
114 | |||
115 | // Always understood. | ||
116 | |||
117 | {"ro", MS_RDONLY}, // vfs flag | ||
118 | {"rw", ~MS_RDONLY}, // vfs flag | ||
119 | {"remount", MS_REMOUNT}, // action flag | ||
120 | }; | ||
121 | |||
122 | #define VECTOR_SIZE(v) (sizeof(v) / sizeof((v)[0])) | ||
123 | |||
124 | /* Append mount options to string */ | ||
125 | static void append_mount_options(char **oldopts, char *newopts) | ||
126 | { | ||
127 | if (*oldopts && **oldopts) { | ||
128 | /* do not insert options which are already there */ | ||
129 | while (newopts[0]) { | ||
130 | char *p; | ||
131 | int len = strlen(newopts); | ||
132 | p = strchr(newopts, ','); | ||
133 | if (p) len = p - newopts; | ||
134 | p = *oldopts; | ||
135 | while (1) { | ||
136 | if (!strncmp(p, newopts, len) | ||
137 | && (p[len]==',' || p[len]==0)) | ||
138 | goto skip; | ||
139 | p = strchr(p,','); | ||
140 | if(!p) break; | ||
141 | p++; | ||
142 | } | ||
143 | p = xasprintf("%s,%.*s", *oldopts, len, newopts); | ||
144 | free(*oldopts); | ||
145 | *oldopts = p; | ||
146 | skip: | ||
147 | newopts += len; | ||
148 | while (newopts[0] == ',') newopts++; | ||
149 | } | ||
150 | } else { | ||
151 | if (ENABLE_FEATURE_CLEAN_UP) free(*oldopts); | ||
152 | *oldopts = xstrdup(newopts); | ||
153 | } | ||
154 | } | ||
155 | |||
156 | /* Use the mount_options list to parse options into flags. | ||
157 | * Also return list of unrecognized options if unrecognized!=NULL */ | ||
158 | static int parse_mount_options(char *options, char **unrecognized) | ||
159 | { | ||
160 | int flags = MS_SILENT; | ||
161 | |||
162 | // Loop through options | ||
163 | for (;;) { | ||
164 | int i; | ||
165 | char *comma = strchr(options, ','); | ||
166 | |||
167 | if (comma) *comma = 0; | ||
168 | |||
169 | // Find this option in mount_options | ||
170 | for (i = 0; i < VECTOR_SIZE(mount_options); i++) { | ||
171 | if (!strcasecmp(mount_options[i].name, options)) { | ||
172 | long fl = mount_options[i].flags; | ||
173 | if (fl < 0) flags &= fl; | ||
174 | else flags |= fl; | ||
175 | break; | ||
176 | } | ||
177 | } | ||
178 | // If unrecognized not NULL, append unrecognized mount options */ | ||
179 | if (unrecognized && i == VECTOR_SIZE(mount_options)) { | ||
180 | // Add it to strflags, to pass on to kernel | ||
181 | i = *unrecognized ? strlen(*unrecognized) : 0; | ||
182 | *unrecognized = xrealloc(*unrecognized, i+strlen(options)+2); | ||
183 | |||
184 | // Comma separated if it's not the first one | ||
185 | if (i) (*unrecognized)[i++] = ','; | ||
186 | strcpy((*unrecognized)+i, options); | ||
187 | } | ||
188 | |||
189 | // Advance to next option, or finish | ||
190 | if (comma) { | ||
191 | *comma = ','; | ||
192 | options = ++comma; | ||
193 | } else break; | ||
194 | } | ||
195 | |||
196 | return flags; | ||
197 | } | ||
198 | |||
199 | // Return a list of all block device backed filesystems | ||
200 | |||
201 | static llist_t *get_block_backed_filesystems(void) | ||
202 | { | ||
203 | static const char *const filesystems[] = { | ||
204 | "/etc/filesystems", | ||
205 | "/proc/filesystems", | ||
206 | 0 | ||
207 | }; | ||
208 | char *fs, *buf; | ||
209 | llist_t *list = 0; | ||
210 | int i; | ||
211 | FILE *f; | ||
212 | |||
213 | for (i = 0; filesystems[i]; i++) { | ||
214 | f = fopen(filesystems[i], "r"); | ||
215 | if (!f) continue; | ||
216 | |||
217 | while ((buf = xmalloc_getline(f)) != 0) { | ||
218 | if (!strncmp(buf, "nodev", 5) && isspace(buf[5])) | ||
219 | continue; | ||
220 | fs = skip_whitespace(buf); | ||
221 | if (*fs=='#' || *fs=='*' || !*fs) continue; | ||
222 | |||
223 | llist_add_to_end(&list, xstrdup(fs)); | ||
224 | free(buf); | ||
225 | } | ||
226 | if (ENABLE_FEATURE_CLEAN_UP) fclose(f); | ||
227 | } | ||
228 | |||
229 | return list; | ||
230 | } | ||
231 | |||
232 | llist_t *fslist = 0; | ||
233 | |||
234 | #if ENABLE_FEATURE_CLEAN_UP | ||
235 | static void delete_block_backed_filesystems(void) | ||
236 | { | ||
237 | llist_free(fslist, free); | ||
238 | } | ||
239 | #else | ||
240 | void delete_block_backed_filesystems(void); | ||
241 | #endif | ||
242 | |||
243 | #if ENABLE_FEATURE_MTAB_SUPPORT | ||
244 | static int useMtab = 1; | ||
245 | static int fakeIt; | ||
246 | #else | ||
247 | #define useMtab 0 | ||
248 | #define fakeIt 0 | ||
249 | #endif | ||
250 | |||
251 | // Perform actual mount of specific filesystem at specific location. | ||
252 | // NB: mp->xxx fields may be trashed on exit | ||
253 | static int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts) | ||
254 | { | ||
255 | int rc = 0; | ||
256 | |||
257 | if (fakeIt) goto mtab; | ||
258 | |||
259 | // Mount, with fallback to read-only if necessary. | ||
260 | |||
261 | for (;;) { | ||
262 | rc = mount(mp->mnt_fsname, mp->mnt_dir, mp->mnt_type, | ||
263 | vfsflags, filteropts); | ||
264 | if (!rc || (vfsflags&MS_RDONLY) || (errno!=EACCES && errno!=EROFS)) | ||
265 | break; | ||
266 | bb_error_msg("%s is write-protected, mounting read-only", | ||
267 | mp->mnt_fsname); | ||
268 | vfsflags |= MS_RDONLY; | ||
269 | } | ||
270 | |||
271 | // Abort entirely if permission denied. | ||
272 | |||
273 | if (rc && errno == EPERM) | ||
274 | bb_error_msg_and_die(bb_msg_perm_denied_are_you_root); | ||
275 | |||
276 | /* If the mount was successful, and we're maintaining an old-style | ||
277 | * mtab file by hand, add the new entry to it now. */ | ||
278 | mtab: | ||
279 | if (ENABLE_FEATURE_MTAB_SUPPORT && useMtab && !rc && !(vfsflags & MS_REMOUNT)) { | ||
280 | char *fsname; | ||
281 | FILE *mountTable = setmntent(bb_path_mtab_file, "a+"); | ||
282 | int i; | ||
283 | |||
284 | if (!mountTable) { | ||
285 | bb_error_msg("no %s",bb_path_mtab_file); | ||
286 | goto ret; | ||
287 | } | ||
288 | |||
289 | // Add vfs string flags | ||
290 | |||
291 | for (i=0; mount_options[i].flags != MS_REMOUNT; i++) | ||
292 | if (mount_options[i].flags > 0 && (mount_options[i].flags & vfsflags)) | ||
293 | append_mount_options(&(mp->mnt_opts), mount_options[i].name); | ||
294 | |||
295 | // Remove trailing / (if any) from directory we mounted on | ||
296 | |||
297 | i = strlen(mp->mnt_dir) - 1; | ||
298 | if (i > 0 && mp->mnt_dir[i] == '/') mp->mnt_dir[i] = 0; | ||
299 | |||
300 | // Convert to canonical pathnames as needed | ||
301 | |||
302 | mp->mnt_dir = bb_simplify_path(mp->mnt_dir); | ||
303 | fsname = 0; | ||
304 | if (!mp->mnt_type || !*mp->mnt_type) { /* bind mount */ | ||
305 | mp->mnt_fsname = fsname = bb_simplify_path(mp->mnt_fsname); | ||
306 | mp->mnt_type = "bind"; | ||
307 | } | ||
308 | mp->mnt_freq = mp->mnt_passno = 0; | ||
309 | |||
310 | // Write and close. | ||
311 | |||
312 | addmntent(mountTable, mp); | ||
313 | endmntent(mountTable); | ||
314 | if (ENABLE_FEATURE_CLEAN_UP) { | ||
315 | free(mp->mnt_dir); | ||
316 | free(fsname); | ||
317 | } | ||
318 | } | ||
319 | ret: | ||
320 | return rc; | ||
321 | } | ||
322 | |||
323 | #if ENABLE_FEATURE_MOUNT_NFS | ||
324 | |||
325 | /* | ||
326 | * Linux NFS mount | ||
327 | * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com> | ||
328 | * | ||
329 | * Licensed under GPLv2, see file LICENSE in this tarball for details. | ||
330 | * | ||
331 | * Wed Feb 8 12:51:48 1995, biro@yggdrasil.com (Ross Biro): allow all port | ||
332 | * numbers to be specified on the command line. | ||
333 | * | ||
334 | * Fri, 8 Mar 1996 18:01:39, Swen Thuemmler <swen@uni-paderborn.de>: | ||
335 | * Omit the call to connect() for Linux version 1.3.11 or later. | ||
336 | * | ||
337 | * Wed Oct 1 23:55:28 1997: Dick Streefland <dick_streefland@tasking.com> | ||
338 | * Implemented the "bg", "fg" and "retry" mount options for NFS. | ||
339 | * | ||
340 | * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org> | ||
341 | * - added Native Language Support | ||
342 | * | ||
343 | * Modified by Olaf Kirch and Trond Myklebust for new NFS code, | ||
344 | * plus NFSv3 stuff. | ||
345 | */ | ||
346 | |||
347 | /* This is just a warning of a common mistake. Possibly this should be a | ||
348 | * uclibc faq entry rather than in busybox... */ | ||
349 | #if defined(__UCLIBC__) && ! defined(__UCLIBC_HAS_RPC__) | ||
350 | #error "You need to build uClibc with UCLIBC_HAS_RPC for NFS support." | ||
351 | #endif | ||
352 | |||
353 | #define MOUNTPORT 635 | ||
354 | #define MNTPATHLEN 1024 | ||
355 | #define MNTNAMLEN 255 | ||
356 | #define FHSIZE 32 | ||
357 | #define FHSIZE3 64 | ||
358 | |||
359 | typedef char fhandle[FHSIZE]; | ||
360 | |||
361 | typedef struct { | ||
362 | unsigned int fhandle3_len; | ||
363 | char *fhandle3_val; | ||
364 | } fhandle3; | ||
365 | |||
366 | enum mountstat3 { | ||
367 | MNT_OK = 0, | ||
368 | MNT3ERR_PERM = 1, | ||
369 | MNT3ERR_NOENT = 2, | ||
370 | MNT3ERR_IO = 5, | ||
371 | MNT3ERR_ACCES = 13, | ||
372 | MNT3ERR_NOTDIR = 20, | ||
373 | MNT3ERR_INVAL = 22, | ||
374 | MNT3ERR_NAMETOOLONG = 63, | ||
375 | MNT3ERR_NOTSUPP = 10004, | ||
376 | MNT3ERR_SERVERFAULT = 10006, | ||
377 | }; | ||
378 | typedef enum mountstat3 mountstat3; | ||
379 | |||
380 | struct fhstatus { | ||
381 | unsigned int fhs_status; | ||
382 | union { | ||
383 | fhandle fhs_fhandle; | ||
384 | } fhstatus_u; | ||
385 | }; | ||
386 | typedef struct fhstatus fhstatus; | ||
387 | |||
388 | struct mountres3_ok { | ||
389 | fhandle3 fhandle; | ||
390 | struct { | ||
391 | unsigned int auth_flavours_len; | ||
392 | char *auth_flavours_val; | ||
393 | } auth_flavours; | ||
394 | }; | ||
395 | typedef struct mountres3_ok mountres3_ok; | ||
396 | |||
397 | struct mountres3 { | ||
398 | mountstat3 fhs_status; | ||
399 | union { | ||
400 | mountres3_ok mountinfo; | ||
401 | } mountres3_u; | ||
402 | }; | ||
403 | typedef struct mountres3 mountres3; | ||
404 | |||
405 | typedef char *dirpath; | ||
406 | |||
407 | typedef char *name; | ||
408 | |||
409 | typedef struct mountbody *mountlist; | ||
410 | |||
411 | struct mountbody { | ||
412 | name ml_hostname; | ||
413 | dirpath ml_directory; | ||
414 | mountlist ml_next; | ||
415 | }; | ||
416 | typedef struct mountbody mountbody; | ||
417 | |||
418 | typedef struct groupnode *groups; | ||
419 | |||
420 | struct groupnode { | ||
421 | name gr_name; | ||
422 | groups gr_next; | ||
423 | }; | ||
424 | typedef struct groupnode groupnode; | ||
425 | |||
426 | typedef struct exportnode *exports; | ||
427 | |||
428 | struct exportnode { | ||
429 | dirpath ex_dir; | ||
430 | groups ex_groups; | ||
431 | exports ex_next; | ||
432 | }; | ||
433 | typedef struct exportnode exportnode; | ||
434 | |||
435 | struct ppathcnf { | ||
436 | int pc_link_max; | ||
437 | short pc_max_canon; | ||
438 | short pc_max_input; | ||
439 | short pc_name_max; | ||
440 | short pc_path_max; | ||
441 | short pc_pipe_buf; | ||
442 | uint8_t pc_vdisable; | ||
443 | char pc_xxx; | ||
444 | short pc_mask[2]; | ||
445 | }; | ||
446 | typedef struct ppathcnf ppathcnf; | ||
447 | |||
448 | #define MOUNTPROG 100005 | ||
449 | #define MOUNTVERS 1 | ||
450 | |||
451 | #define MOUNTPROC_NULL 0 | ||
452 | #define MOUNTPROC_MNT 1 | ||
453 | #define MOUNTPROC_DUMP 2 | ||
454 | #define MOUNTPROC_UMNT 3 | ||
455 | #define MOUNTPROC_UMNTALL 4 | ||
456 | #define MOUNTPROC_EXPORT 5 | ||
457 | #define MOUNTPROC_EXPORTALL 6 | ||
458 | |||
459 | #define MOUNTVERS_POSIX 2 | ||
460 | |||
461 | #define MOUNTPROC_PATHCONF 7 | ||
462 | |||
463 | #define MOUNT_V3 3 | ||
464 | |||
465 | #define MOUNTPROC3_NULL 0 | ||
466 | #define MOUNTPROC3_MNT 1 | ||
467 | #define MOUNTPROC3_DUMP 2 | ||
468 | #define MOUNTPROC3_UMNT 3 | ||
469 | #define MOUNTPROC3_UMNTALL 4 | ||
470 | #define MOUNTPROC3_EXPORT 5 | ||
471 | |||
472 | enum { | ||
473 | #ifndef NFS_FHSIZE | ||
474 | NFS_FHSIZE = 32, | ||
475 | #endif | ||
476 | #ifndef NFS_PORT | ||
477 | NFS_PORT = 2049 | ||
478 | #endif | ||
479 | }; | ||
480 | |||
481 | /* | ||
482 | * We want to be able to compile mount on old kernels in such a way | ||
483 | * that the binary will work well on more recent kernels. | ||
484 | * Thus, if necessary we teach nfsmount.c the structure of new fields | ||
485 | * that will come later. | ||
486 | * | ||
487 | * Moreover, the new kernel includes conflict with glibc includes | ||
488 | * so it is easiest to ignore the kernel altogether (at compile time). | ||
489 | */ | ||
490 | |||
491 | struct nfs2_fh { | ||
492 | char data[32]; | ||
493 | }; | ||
494 | struct nfs3_fh { | ||
495 | unsigned short size; | ||
496 | unsigned char data[64]; | ||
497 | }; | ||
498 | |||
499 | struct nfs_mount_data { | ||
500 | int version; /* 1 */ | ||
501 | int fd; /* 1 */ | ||
502 | struct nfs2_fh old_root; /* 1 */ | ||
503 | int flags; /* 1 */ | ||
504 | int rsize; /* 1 */ | ||
505 | int wsize; /* 1 */ | ||
506 | int timeo; /* 1 */ | ||
507 | int retrans; /* 1 */ | ||
508 | int acregmin; /* 1 */ | ||
509 | int acregmax; /* 1 */ | ||
510 | int acdirmin; /* 1 */ | ||
511 | int acdirmax; /* 1 */ | ||
512 | struct sockaddr_in addr; /* 1 */ | ||
513 | char hostname[256]; /* 1 */ | ||
514 | int namlen; /* 2 */ | ||
515 | unsigned int bsize; /* 3 */ | ||
516 | struct nfs3_fh root; /* 4 */ | ||
517 | }; | ||
518 | |||
519 | /* bits in the flags field */ | ||
520 | enum { | ||
521 | NFS_MOUNT_SOFT = 0x0001, /* 1 */ | ||
522 | NFS_MOUNT_INTR = 0x0002, /* 1 */ | ||
523 | NFS_MOUNT_SECURE = 0x0004, /* 1 */ | ||
524 | NFS_MOUNT_POSIX = 0x0008, /* 1 */ | ||
525 | NFS_MOUNT_NOCTO = 0x0010, /* 1 */ | ||
526 | NFS_MOUNT_NOAC = 0x0020, /* 1 */ | ||
527 | NFS_MOUNT_TCP = 0x0040, /* 2 */ | ||
528 | NFS_MOUNT_VER3 = 0x0080, /* 3 */ | ||
529 | NFS_MOUNT_KERBEROS = 0x0100, /* 3 */ | ||
530 | NFS_MOUNT_NONLM = 0x0200 /* 3 */ | ||
531 | }; | ||
532 | |||
533 | |||
534 | /* | ||
535 | * We need to translate between nfs status return values and | ||
536 | * the local errno values which may not be the same. | ||
537 | * | ||
538 | * Andreas Schwab <schwab@LS5.informatik.uni-dortmund.de>: change errno: | ||
539 | * "after #include <errno.h> the symbol errno is reserved for any use, | ||
540 | * it cannot even be used as a struct tag or field name". | ||
541 | */ | ||
542 | |||
543 | #ifndef EDQUOT | ||
544 | #define EDQUOT ENOSPC | ||
545 | #endif | ||
546 | |||
547 | // Convert each NFSERR_BLAH into EBLAH | ||
548 | |||
549 | static const struct { | ||
550 | int stat; | ||
551 | int errnum; | ||
552 | } nfs_errtbl[] = { | ||
553 | {0,0}, {1,EPERM}, {2,ENOENT}, {5,EIO}, {6,ENXIO}, {13,EACCES}, {17,EEXIST}, | ||
554 | {19,ENODEV}, {20,ENOTDIR}, {21,EISDIR}, {22,EINVAL}, {27,EFBIG}, | ||
555 | {28,ENOSPC}, {30,EROFS}, {63,ENAMETOOLONG}, {66,ENOTEMPTY}, {69,EDQUOT}, | ||
556 | {70,ESTALE}, {71,EREMOTE}, {-1,EIO} | ||
557 | }; | ||
558 | |||
559 | static char *nfs_strerror(int status) | ||
560 | { | ||
561 | int i; | ||
562 | static char buf[sizeof("unknown nfs status return value: ") + sizeof(int)*3]; | ||
563 | |||
564 | for (i = 0; nfs_errtbl[i].stat != -1; i++) { | ||
565 | if (nfs_errtbl[i].stat == status) | ||
566 | return strerror(nfs_errtbl[i].errnum); | ||
567 | } | ||
568 | sprintf(buf, "unknown nfs status return value: %d", status); | ||
569 | return buf; | ||
570 | } | ||
571 | |||
572 | static bool_t xdr_fhandle(XDR *xdrs, fhandle objp) | ||
573 | { | ||
574 | if (!xdr_opaque(xdrs, objp, FHSIZE)) | ||
575 | return FALSE; | ||
576 | return TRUE; | ||
577 | } | ||
578 | |||
579 | static bool_t xdr_fhstatus(XDR *xdrs, fhstatus *objp) | ||
580 | { | ||
581 | if (!xdr_u_int(xdrs, &objp->fhs_status)) | ||
582 | return FALSE; | ||
583 | switch (objp->fhs_status) { | ||
584 | case 0: | ||
585 | if (!xdr_fhandle(xdrs, objp->fhstatus_u.fhs_fhandle)) | ||
586 | return FALSE; | ||
587 | break; | ||
588 | default: | ||
589 | break; | ||
590 | } | ||
591 | return TRUE; | ||
592 | } | ||
593 | |||
594 | static bool_t xdr_dirpath(XDR *xdrs, dirpath *objp) | ||
595 | { | ||
596 | if (!xdr_string(xdrs, objp, MNTPATHLEN)) | ||
597 | return FALSE; | ||
598 | return TRUE; | ||
599 | } | ||
600 | |||
601 | static bool_t xdr_fhandle3(XDR *xdrs, fhandle3 *objp) | ||
602 | { | ||
603 | if (!xdr_bytes(xdrs, (char **)&objp->fhandle3_val, (unsigned int *) &objp->fhandle3_len, FHSIZE3)) | ||
604 | return FALSE; | ||
605 | return TRUE; | ||
606 | } | ||
607 | |||
608 | static bool_t xdr_mountres3_ok(XDR *xdrs, mountres3_ok *objp) | ||
609 | { | ||
610 | if (!xdr_fhandle3(xdrs, &objp->fhandle)) | ||
611 | return FALSE; | ||
612 | if (!xdr_array(xdrs, &(objp->auth_flavours.auth_flavours_val), &(objp->auth_flavours.auth_flavours_len), ~0, | ||
613 | sizeof (int), (xdrproc_t) xdr_int)) | ||
614 | return FALSE; | ||
615 | return TRUE; | ||
616 | } | ||
617 | |||
618 | static bool_t xdr_mountstat3(XDR *xdrs, mountstat3 *objp) | ||
619 | { | ||
620 | if (!xdr_enum(xdrs, (enum_t *) objp)) | ||
621 | return FALSE; | ||
622 | return TRUE; | ||
623 | } | ||
624 | |||
625 | static bool_t xdr_mountres3(XDR *xdrs, mountres3 *objp) | ||
626 | { | ||
627 | if (!xdr_mountstat3(xdrs, &objp->fhs_status)) | ||
628 | return FALSE; | ||
629 | switch (objp->fhs_status) { | ||
630 | case MNT_OK: | ||
631 | if (!xdr_mountres3_ok(xdrs, &objp->mountres3_u.mountinfo)) | ||
632 | return FALSE; | ||
633 | break; | ||
634 | default: | ||
635 | break; | ||
636 | } | ||
637 | return TRUE; | ||
638 | } | ||
639 | |||
640 | #define MAX_NFSPROT ((nfs_mount_version >= 4) ? 3 : 2) | ||
641 | |||
642 | /* | ||
643 | * nfs_mount_version according to the sources seen at compile time. | ||
644 | */ | ||
645 | static int nfs_mount_version; | ||
646 | static int kernel_version; | ||
647 | |||
648 | /* | ||
649 | * Unfortunately, the kernel prints annoying console messages | ||
650 | * in case of an unexpected nfs mount version (instead of | ||
651 | * just returning some error). Therefore we'll have to try | ||
652 | * and figure out what version the kernel expects. | ||
653 | * | ||
654 | * Variables: | ||
655 | * KERNEL_NFS_MOUNT_VERSION: kernel sources at compile time | ||
656 | * NFS_MOUNT_VERSION: these nfsmount sources at compile time | ||
657 | * nfs_mount_version: version this source and running kernel can handle | ||
658 | */ | ||
659 | static void | ||
660 | find_kernel_nfs_mount_version(void) | ||
661 | { | ||
662 | if (kernel_version) | ||
663 | return; | ||
664 | |||
665 | nfs_mount_version = 4; /* default */ | ||
666 | |||
667 | kernel_version = get_linux_version_code(); | ||
668 | if (kernel_version) { | ||
669 | if (kernel_version < KERNEL_VERSION(2,1,32)) | ||
670 | nfs_mount_version = 1; | ||
671 | else if (kernel_version < KERNEL_VERSION(2,2,18) || | ||
672 | (kernel_version >= KERNEL_VERSION(2,3,0) && | ||
673 | kernel_version < KERNEL_VERSION(2,3,99))) | ||
674 | nfs_mount_version = 3; | ||
675 | /* else v4 since 2.3.99pre4 */ | ||
676 | } | ||
677 | } | ||
678 | |||
679 | static struct pmap * | ||
680 | get_mountport(struct sockaddr_in *server_addr, | ||
681 | long unsigned prog, | ||
682 | long unsigned version, | ||
683 | long unsigned proto, | ||
684 | long unsigned port) | ||
685 | { | ||
686 | struct pmaplist *pmap; | ||
687 | static struct pmap p = {0, 0, 0, 0}; | ||
688 | |||
689 | server_addr->sin_port = PMAPPORT; | ||
690 | pmap = pmap_getmaps(server_addr); | ||
691 | |||
692 | if (version > MAX_NFSPROT) | ||
693 | version = MAX_NFSPROT; | ||
694 | if (!prog) | ||
695 | prog = MOUNTPROG; | ||
696 | p.pm_prog = prog; | ||
697 | p.pm_vers = version; | ||
698 | p.pm_prot = proto; | ||
699 | p.pm_port = port; | ||
700 | |||
701 | while (pmap) { | ||
702 | if (pmap->pml_map.pm_prog != prog) | ||
703 | goto next; | ||
704 | if (!version && p.pm_vers > pmap->pml_map.pm_vers) | ||
705 | goto next; | ||
706 | if (version > 2 && pmap->pml_map.pm_vers != version) | ||
707 | goto next; | ||
708 | if (version && version <= 2 && pmap->pml_map.pm_vers > 2) | ||
709 | goto next; | ||
710 | if (pmap->pml_map.pm_vers > MAX_NFSPROT || | ||
711 | (proto && p.pm_prot && pmap->pml_map.pm_prot != proto) || | ||
712 | (port && pmap->pml_map.pm_port != port)) | ||
713 | goto next; | ||
714 | memcpy(&p, &pmap->pml_map, sizeof(p)); | ||
715 | next: | ||
716 | pmap = pmap->pml_next; | ||
717 | } | ||
718 | if (!p.pm_vers) | ||
719 | p.pm_vers = MOUNTVERS; | ||
720 | if (!p.pm_port) | ||
721 | p.pm_port = MOUNTPORT; | ||
722 | if (!p.pm_prot) | ||
723 | p.pm_prot = IPPROTO_TCP; | ||
724 | return &p; | ||
725 | } | ||
726 | |||
727 | static int daemonize(void) | ||
728 | { | ||
729 | int fd; | ||
730 | int pid = fork(); | ||
731 | if (pid < 0) /* error */ | ||
732 | return -errno; | ||
733 | if (pid > 0) /* parent */ | ||
734 | return 0; | ||
735 | /* child */ | ||
736 | fd = xopen(bb_dev_null, O_RDWR); | ||
737 | dup2(fd, 0); | ||
738 | dup2(fd, 1); | ||
739 | dup2(fd, 2); | ||
740 | while (fd > 2) close(fd--); | ||
741 | setsid(); | ||
742 | openlog(applet_name, LOG_PID, LOG_DAEMON); | ||
743 | logmode = LOGMODE_SYSLOG; | ||
744 | return 1; | ||
745 | } | ||
746 | |||
747 | // TODO | ||
748 | static inline int we_saw_this_host_before(const char *hostname) | ||
749 | { | ||
750 | return 0; | ||
751 | } | ||
752 | |||
753 | /* RPC strerror analogs are terminally idiotic: | ||
754 | * *mandatory* prefix and \n at end. | ||
755 | * This hopefully helps. Usage: | ||
756 | * error_msg_rpc(clnt_*error*(" ")) */ | ||
757 | static void error_msg_rpc(const char *msg) | ||
758 | { | ||
759 | int len; | ||
760 | while (msg[0] == ' ' || msg[0] == ':') msg++; | ||
761 | len = strlen(msg); | ||
762 | while (len && msg[len-1] == '\n') len--; | ||
763 | bb_error_msg("%.*s", len, msg); | ||
764 | } | ||
765 | |||
766 | // NB: mp->xxx fields may be trashed on exit | ||
767 | static int nfsmount(struct mntent *mp, int vfsflags, char *filteropts) | ||
768 | { | ||
769 | CLIENT *mclient; | ||
770 | char *hostname; | ||
771 | char *pathname; | ||
772 | char *mounthost; | ||
773 | struct nfs_mount_data data; | ||
774 | char *opt; | ||
775 | struct hostent *hp; | ||
776 | struct sockaddr_in server_addr; | ||
777 | struct sockaddr_in mount_server_addr; | ||
778 | int msock, fsock; | ||
779 | union { | ||
780 | struct fhstatus nfsv2; | ||
781 | struct mountres3 nfsv3; | ||
782 | } status; | ||
783 | int daemonized; | ||
784 | char *s; | ||
785 | int port; | ||
786 | int mountport; | ||
787 | int proto; | ||
788 | int bg; | ||
789 | int soft; | ||
790 | int intr; | ||
791 | int posix; | ||
792 | int nocto; | ||
793 | int noac; | ||
794 | int nolock; | ||
795 | int retry; | ||
796 | int tcp; | ||
797 | int mountprog; | ||
798 | int mountvers; | ||
799 | int nfsprog; | ||
800 | int nfsvers; | ||
801 | int retval; | ||
802 | |||
803 | find_kernel_nfs_mount_version(); | ||
804 | |||
805 | daemonized = 0; | ||
806 | mounthost = NULL; | ||
807 | retval = ETIMEDOUT; | ||
808 | msock = fsock = -1; | ||
809 | mclient = NULL; | ||
810 | |||
811 | /* NB: hostname, mounthost, filteropts must be free()d prior to return */ | ||
812 | |||
813 | filteropts = xstrdup(filteropts); /* going to trash it later... */ | ||
814 | |||
815 | hostname = xstrdup(mp->mnt_fsname); | ||
816 | /* mount_main() guarantees that ':' is there */ | ||
817 | s = strchr(hostname, ':'); | ||
818 | pathname = s + 1; | ||
819 | *s = '\0'; | ||
820 | /* Ignore all but first hostname in replicated mounts | ||
821 | until they can be fully supported. (mack@sgi.com) */ | ||
822 | s = strchr(hostname, ','); | ||
823 | if (s) { | ||
824 | *s = '\0'; | ||
825 | bb_error_msg("warning: multiple hostnames not supported"); | ||
826 | } | ||
827 | |||
828 | server_addr.sin_family = AF_INET; | ||
829 | if (!inet_aton(hostname, &server_addr.sin_addr)) { | ||
830 | hp = gethostbyname(hostname); | ||
831 | if (hp == NULL) { | ||
832 | bb_herror_msg("%s", hostname); | ||
833 | goto fail; | ||
834 | } | ||
835 | if (hp->h_length > sizeof(struct in_addr)) { | ||
836 | bb_error_msg("got bad hp->h_length"); | ||
837 | hp->h_length = sizeof(struct in_addr); | ||
838 | } | ||
839 | memcpy(&server_addr.sin_addr, | ||
840 | hp->h_addr, hp->h_length); | ||
841 | } | ||
842 | |||
843 | memcpy(&mount_server_addr, &server_addr, sizeof(mount_server_addr)); | ||
844 | |||
845 | /* add IP address to mtab options for use when unmounting */ | ||
846 | |||
847 | if (!mp->mnt_opts) { /* TODO: actually mp->mnt_opts is never NULL */ | ||
848 | mp->mnt_opts = xasprintf("addr=%s", inet_ntoa(server_addr.sin_addr)); | ||
849 | } else { | ||
850 | char *tmp = xasprintf("%s%saddr=%s", mp->mnt_opts, | ||
851 | mp->mnt_opts[0] ? "," : "", | ||
852 | inet_ntoa(server_addr.sin_addr)); | ||
853 | free(mp->mnt_opts); | ||
854 | mp->mnt_opts = tmp; | ||
855 | } | ||
856 | |||
857 | /* Set default options. | ||
858 | * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to | ||
859 | * let the kernel decide. | ||
860 | * timeo is filled in after we know whether it'll be TCP or UDP. */ | ||
861 | memset(&data, 0, sizeof(data)); | ||
862 | data.retrans = 3; | ||
863 | data.acregmin = 3; | ||
864 | data.acregmax = 60; | ||
865 | data.acdirmin = 30; | ||
866 | data.acdirmax = 60; | ||
867 | data.namlen = NAME_MAX; | ||
868 | |||
869 | bg = 0; | ||
870 | soft = 0; | ||
871 | intr = 0; | ||
872 | posix = 0; | ||
873 | nocto = 0; | ||
874 | nolock = 0; | ||
875 | noac = 0; | ||
876 | retry = 10000; /* 10000 minutes ~ 1 week */ | ||
877 | tcp = 0; | ||
878 | |||
879 | mountprog = MOUNTPROG; | ||
880 | mountvers = 0; | ||
881 | port = 0; | ||
882 | mountport = 0; | ||
883 | nfsprog = 100003; | ||
884 | nfsvers = 0; | ||
885 | |||
886 | /* parse options */ | ||
887 | |||
888 | for (opt = strtok(filteropts, ","); opt; opt = strtok(NULL, ",")) { | ||
889 | char *opteq = strchr(opt, '='); | ||
890 | if (opteq) { | ||
891 | const char *const options[] = { | ||
892 | /* 0 */ "rsize", | ||
893 | /* 1 */ "wsize", | ||
894 | /* 2 */ "timeo", | ||
895 | /* 3 */ "retrans", | ||
896 | /* 4 */ "acregmin", | ||
897 | /* 5 */ "acregmax", | ||
898 | /* 6 */ "acdirmin", | ||
899 | /* 7 */ "acdirmax", | ||
900 | /* 8 */ "actimeo", | ||
901 | /* 9 */ "retry", | ||
902 | /* 10 */ "port", | ||
903 | /* 11 */ "mountport", | ||
904 | /* 12 */ "mounthost", | ||
905 | /* 13 */ "mountprog", | ||
906 | /* 14 */ "mountvers", | ||
907 | /* 15 */ "nfsprog", | ||
908 | /* 16 */ "nfsvers", | ||
909 | /* 17 */ "vers", | ||
910 | /* 18 */ "proto", | ||
911 | /* 19 */ "namlen", | ||
912 | /* 20 */ "addr", | ||
913 | NULL | ||
914 | }; | ||
915 | int val = xatoi_u(opteq + 1); | ||
916 | *opteq = '\0'; | ||
917 | switch (index_in_str_array(options, opt)) { | ||
918 | case 0: // "rsize" | ||
919 | data.rsize = val; | ||
920 | break; | ||
921 | case 1: // "wsize" | ||
922 | data.wsize = val; | ||
923 | break; | ||
924 | case 2: // "timeo" | ||
925 | data.timeo = val; | ||
926 | break; | ||
927 | case 3: // "retrans" | ||
928 | data.retrans = val; | ||
929 | break; | ||
930 | case 4: // "acregmin" | ||
931 | data.acregmin = val; | ||
932 | break; | ||
933 | case 5: // "acregmax" | ||
934 | data.acregmax = val; | ||
935 | break; | ||
936 | case 6: // "acdirmin" | ||
937 | data.acdirmin = val; | ||
938 | break; | ||
939 | case 7: // "acdirmax" | ||
940 | data.acdirmax = val; | ||
941 | break; | ||
942 | case 8: // "actimeo" | ||
943 | data.acregmin = val; | ||
944 | data.acregmax = val; | ||
945 | data.acdirmin = val; | ||
946 | data.acdirmax = val; | ||
947 | break; | ||
948 | case 9: // "retry" | ||
949 | retry = val; | ||
950 | break; | ||
951 | case 10: // "port" | ||
952 | port = val; | ||
953 | break; | ||
954 | case 11: // "mountport" | ||
955 | mountport = val; | ||
956 | break; | ||
957 | case 12: // "mounthost" | ||
958 | mounthost = xstrndup(opteq+1, | ||
959 | strcspn(opteq+1," \t\n\r,")); | ||
960 | break; | ||
961 | case 13: // "mountprog" | ||
962 | mountprog = val; | ||
963 | break; | ||
964 | case 14: // "mountvers" | ||
965 | mountvers = val; | ||
966 | break; | ||
967 | case 15: // "nfsprog" | ||
968 | nfsprog = val; | ||
969 | break; | ||
970 | case 16: // "nfsvers" | ||
971 | case 17: // "vers" | ||
972 | nfsvers = val; | ||
973 | break; | ||
974 | case 18: // "proto" | ||
975 | if (!strncmp(opteq+1, "tcp", 3)) | ||
976 | tcp = 1; | ||
977 | else if (!strncmp(opteq+1, "udp", 3)) | ||
978 | tcp = 0; | ||
979 | else | ||
980 | bb_error_msg("warning: unrecognized proto= option"); | ||
981 | break; | ||
982 | case 19: // "namlen" | ||
983 | if (nfs_mount_version >= 2) | ||
984 | data.namlen = val; | ||
985 | else | ||
986 | bb_error_msg("warning: option namlen is not supported\n"); | ||
987 | break; | ||
988 | case 20: // "addr" - ignore | ||
989 | break; | ||
990 | default: | ||
991 | bb_error_msg("unknown nfs mount parameter: %s=%d", opt, val); | ||
992 | goto fail; | ||
993 | } | ||
994 | } | ||
995 | else { | ||
996 | const char *const options[] = { | ||
997 | "bg", | ||
998 | "fg", | ||
999 | "soft", | ||
1000 | "hard", | ||
1001 | "intr", | ||
1002 | "posix", | ||
1003 | "cto", | ||
1004 | "ac", | ||
1005 | "tcp", | ||
1006 | "udp", | ||
1007 | "lock", | ||
1008 | NULL | ||
1009 | }; | ||
1010 | int val = 1; | ||
1011 | if (!strncmp(opt, "no", 2)) { | ||
1012 | val = 0; | ||
1013 | opt += 2; | ||
1014 | } | ||
1015 | switch (index_in_str_array(options, opt)) { | ||
1016 | case 0: // "bg" | ||
1017 | bg = val; | ||
1018 | break; | ||
1019 | case 1: // "fg" | ||
1020 | bg = !val; | ||
1021 | break; | ||
1022 | case 2: // "soft" | ||
1023 | soft = val; | ||
1024 | break; | ||
1025 | case 3: // "hard" | ||
1026 | soft = !val; | ||
1027 | break; | ||
1028 | case 4: // "intr" | ||
1029 | intr = val; | ||
1030 | break; | ||
1031 | case 5: // "posix" | ||
1032 | posix = val; | ||
1033 | break; | ||
1034 | case 6: // "cto" | ||
1035 | nocto = !val; | ||
1036 | break; | ||
1037 | case 7: // "ac" | ||
1038 | noac = !val; | ||
1039 | break; | ||
1040 | case 8: // "tcp" | ||
1041 | tcp = val; | ||
1042 | break; | ||
1043 | case 9: // "udp" | ||
1044 | tcp = !val; | ||
1045 | break; | ||
1046 | case 10: // "lock" | ||
1047 | if (nfs_mount_version >= 3) | ||
1048 | nolock = !val; | ||
1049 | else | ||
1050 | bb_error_msg("warning: option nolock is not supported"); | ||
1051 | break; | ||
1052 | default: | ||
1053 | bb_error_msg("unknown nfs mount option: %s%s", val ? "" : "no", opt); | ||
1054 | goto fail; | ||
1055 | } | ||
1056 | } | ||
1057 | } | ||
1058 | proto = (tcp) ? IPPROTO_TCP : IPPROTO_UDP; | ||
1059 | |||
1060 | data.flags = (soft ? NFS_MOUNT_SOFT : 0) | ||
1061 | | (intr ? NFS_MOUNT_INTR : 0) | ||
1062 | | (posix ? NFS_MOUNT_POSIX : 0) | ||
1063 | | (nocto ? NFS_MOUNT_NOCTO : 0) | ||
1064 | | (noac ? NFS_MOUNT_NOAC : 0); | ||
1065 | if (nfs_mount_version >= 2) | ||
1066 | data.flags |= (tcp ? NFS_MOUNT_TCP : 0); | ||
1067 | if (nfs_mount_version >= 3) | ||
1068 | data.flags |= (nolock ? NFS_MOUNT_NONLM : 0); | ||
1069 | if (nfsvers > MAX_NFSPROT || mountvers > MAX_NFSPROT) { | ||
1070 | bb_error_msg("NFSv%d not supported", nfsvers); | ||
1071 | goto fail; | ||
1072 | } | ||
1073 | if (nfsvers && !mountvers) | ||
1074 | mountvers = (nfsvers < 3) ? 1 : nfsvers; | ||
1075 | if (nfsvers && nfsvers < mountvers) { | ||
1076 | mountvers = nfsvers; | ||
1077 | } | ||
1078 | |||
1079 | /* Adjust options if none specified */ | ||
1080 | if (!data.timeo) | ||
1081 | data.timeo = tcp ? 70 : 7; | ||
1082 | |||
1083 | data.version = nfs_mount_version; | ||
1084 | |||
1085 | if (vfsflags & MS_REMOUNT) | ||
1086 | goto do_mount; | ||
1087 | |||
1088 | /* | ||
1089 | * If the previous mount operation on the same host was | ||
1090 | * backgrounded, and the "bg" for this mount is also set, | ||
1091 | * give up immediately, to avoid the initial timeout. | ||
1092 | */ | ||
1093 | if (bg && we_saw_this_host_before(hostname)) { | ||
1094 | daemonized = daemonize(); /* parent or error */ | ||
1095 | if (daemonized <= 0) { /* parent or error */ | ||
1096 | retval = -daemonized; | ||
1097 | goto ret; | ||
1098 | } | ||
1099 | } | ||
1100 | |||
1101 | /* create mount daemon client */ | ||
1102 | /* See if the nfs host = mount host. */ | ||
1103 | if (mounthost) { | ||
1104 | if (mounthost[0] >= '0' && mounthost[0] <= '9') { | ||
1105 | mount_server_addr.sin_family = AF_INET; | ||
1106 | mount_server_addr.sin_addr.s_addr = inet_addr(hostname); | ||
1107 | } else { | ||
1108 | hp = gethostbyname(mounthost); | ||
1109 | if (hp == NULL) { | ||
1110 | bb_herror_msg("%s", mounthost); | ||
1111 | goto fail; | ||
1112 | } else { | ||
1113 | if (hp->h_length > sizeof(struct in_addr)) { | ||
1114 | bb_error_msg("got bad hp->h_length?"); | ||
1115 | hp->h_length = sizeof(struct in_addr); | ||
1116 | } | ||
1117 | mount_server_addr.sin_family = AF_INET; | ||
1118 | memcpy(&mount_server_addr.sin_addr, | ||
1119 | hp->h_addr, hp->h_length); | ||
1120 | } | ||
1121 | } | ||
1122 | } | ||
1123 | |||
1124 | /* | ||
1125 | * The following loop implements the mount retries. When the mount | ||
1126 | * times out, and the "bg" option is set, we background ourself | ||
1127 | * and continue trying. | ||
1128 | * | ||
1129 | * The case where the mount point is not present and the "bg" | ||
1130 | * option is set, is treated as a timeout. This is done to | ||
1131 | * support nested mounts. | ||
1132 | * | ||
1133 | * The "retry" count specified by the user is the number of | ||
1134 | * minutes to retry before giving up. | ||
1135 | */ | ||
1136 | { | ||
1137 | struct timeval total_timeout; | ||
1138 | struct timeval retry_timeout; | ||
1139 | struct pmap* pm_mnt; | ||
1140 | time_t t; | ||
1141 | time_t prevt; | ||
1142 | time_t timeout; | ||
1143 | |||
1144 | retry_timeout.tv_sec = 3; | ||
1145 | retry_timeout.tv_usec = 0; | ||
1146 | total_timeout.tv_sec = 20; | ||
1147 | total_timeout.tv_usec = 0; | ||
1148 | timeout = time(NULL) + 60 * retry; | ||
1149 | prevt = 0; | ||
1150 | t = 30; | ||
1151 | retry: | ||
1152 | /* be careful not to use too many CPU cycles */ | ||
1153 | if (t - prevt < 30) | ||
1154 | sleep(30); | ||
1155 | |||
1156 | pm_mnt = get_mountport(&mount_server_addr, | ||
1157 | mountprog, | ||
1158 | mountvers, | ||
1159 | proto, | ||
1160 | mountport); | ||
1161 | nfsvers = (pm_mnt->pm_vers < 2) ? 2 : pm_mnt->pm_vers; | ||
1162 | |||
1163 | /* contact the mount daemon via TCP */ | ||
1164 | mount_server_addr.sin_port = htons(pm_mnt->pm_port); | ||
1165 | msock = RPC_ANYSOCK; | ||
1166 | |||
1167 | switch (pm_mnt->pm_prot) { | ||
1168 | case IPPROTO_UDP: | ||
1169 | mclient = clntudp_create(&mount_server_addr, | ||
1170 | pm_mnt->pm_prog, | ||
1171 | pm_mnt->pm_vers, | ||
1172 | retry_timeout, | ||
1173 | &msock); | ||
1174 | if (mclient) | ||
1175 | break; | ||
1176 | mount_server_addr.sin_port = htons(pm_mnt->pm_port); | ||
1177 | msock = RPC_ANYSOCK; | ||
1178 | case IPPROTO_TCP: | ||
1179 | mclient = clnttcp_create(&mount_server_addr, | ||
1180 | pm_mnt->pm_prog, | ||
1181 | pm_mnt->pm_vers, | ||
1182 | &msock, 0, 0); | ||
1183 | break; | ||
1184 | default: | ||
1185 | mclient = 0; | ||
1186 | } | ||
1187 | if (!mclient) { | ||
1188 | if (!daemonized && prevt == 0) | ||
1189 | error_msg_rpc(clnt_spcreateerror(" ")); | ||
1190 | } else { | ||
1191 | enum clnt_stat clnt_stat; | ||
1192 | /* try to mount hostname:pathname */ | ||
1193 | mclient->cl_auth = authunix_create_default(); | ||
1194 | |||
1195 | /* make pointers in xdr_mountres3 NULL so | ||
1196 | * that xdr_array allocates memory for us | ||
1197 | */ | ||
1198 | memset(&status, 0, sizeof(status)); | ||
1199 | |||
1200 | if (pm_mnt->pm_vers == 3) | ||
1201 | clnt_stat = clnt_call(mclient, MOUNTPROC3_MNT, | ||
1202 | (xdrproc_t) xdr_dirpath, | ||
1203 | (caddr_t) &pathname, | ||
1204 | (xdrproc_t) xdr_mountres3, | ||
1205 | (caddr_t) &status, | ||
1206 | total_timeout); | ||
1207 | else | ||
1208 | clnt_stat = clnt_call(mclient, MOUNTPROC_MNT, | ||
1209 | (xdrproc_t) xdr_dirpath, | ||
1210 | (caddr_t) &pathname, | ||
1211 | (xdrproc_t) xdr_fhstatus, | ||
1212 | (caddr_t) &status, | ||
1213 | total_timeout); | ||
1214 | |||
1215 | if (clnt_stat == RPC_SUCCESS) | ||
1216 | goto prepare_kernel_data; /* we're done */ | ||
1217 | if (errno != ECONNREFUSED) { | ||
1218 | error_msg_rpc(clnt_sperror(mclient, " ")); | ||
1219 | goto fail; /* don't retry */ | ||
1220 | } | ||
1221 | /* Connection refused */ | ||
1222 | if (!daemonized && prevt == 0) /* print just once */ | ||
1223 | error_msg_rpc(clnt_sperror(mclient, " ")); | ||
1224 | auth_destroy(mclient->cl_auth); | ||
1225 | clnt_destroy(mclient); | ||
1226 | mclient = 0; | ||
1227 | close(msock); | ||
1228 | } | ||
1229 | |||
1230 | /* Timeout. We are going to retry... maybe */ | ||
1231 | |||
1232 | if (!bg) | ||
1233 | goto fail; | ||
1234 | if (!daemonized) { | ||
1235 | daemonized = daemonize(); | ||
1236 | if (daemonized <= 0) { /* parent or error */ | ||
1237 | retval = -daemonized; | ||
1238 | goto ret; | ||
1239 | } | ||
1240 | } | ||
1241 | prevt = t; | ||
1242 | t = time(NULL); | ||
1243 | if (t >= timeout) | ||
1244 | /* TODO error message */ | ||
1245 | goto fail; | ||
1246 | |||
1247 | goto retry; | ||
1248 | } | ||
1249 | |||
1250 | prepare_kernel_data: | ||
1251 | |||
1252 | if (nfsvers == 2) { | ||
1253 | if (status.nfsv2.fhs_status != 0) { | ||
1254 | bb_error_msg("%s:%s failed, reason given by server: %s", | ||
1255 | hostname, pathname, | ||
1256 | nfs_strerror(status.nfsv2.fhs_status)); | ||
1257 | goto fail; | ||
1258 | } | ||
1259 | memcpy(data.root.data, | ||
1260 | (char *) status.nfsv2.fhstatus_u.fhs_fhandle, | ||
1261 | NFS_FHSIZE); | ||
1262 | data.root.size = NFS_FHSIZE; | ||
1263 | memcpy(data.old_root.data, | ||
1264 | (char *) status.nfsv2.fhstatus_u.fhs_fhandle, | ||
1265 | NFS_FHSIZE); | ||
1266 | } else { | ||
1267 | fhandle3 *my_fhandle; | ||
1268 | if (status.nfsv3.fhs_status != 0) { | ||
1269 | bb_error_msg("%s:%s failed, reason given by server: %s", | ||
1270 | hostname, pathname, | ||
1271 | nfs_strerror(status.nfsv3.fhs_status)); | ||
1272 | goto fail; | ||
1273 | } | ||
1274 | my_fhandle = &status.nfsv3.mountres3_u.mountinfo.fhandle; | ||
1275 | memset(data.old_root.data, 0, NFS_FHSIZE); | ||
1276 | memset(&data.root, 0, sizeof(data.root)); | ||
1277 | data.root.size = my_fhandle->fhandle3_len; | ||
1278 | memcpy(data.root.data, | ||
1279 | (char *) my_fhandle->fhandle3_val, | ||
1280 | my_fhandle->fhandle3_len); | ||
1281 | |||
1282 | data.flags |= NFS_MOUNT_VER3; | ||
1283 | } | ||
1284 | |||
1285 | /* create nfs socket for kernel */ | ||
1286 | |||
1287 | if (tcp) { | ||
1288 | if (nfs_mount_version < 3) { | ||
1289 | bb_error_msg("NFS over TCP is not supported"); | ||
1290 | goto fail; | ||
1291 | } | ||
1292 | fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); | ||
1293 | } else | ||
1294 | fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); | ||
1295 | if (fsock < 0) { | ||
1296 | bb_perror_msg("nfs socket"); | ||
1297 | goto fail; | ||
1298 | } | ||
1299 | if (bindresvport(fsock, 0) < 0) { | ||
1300 | bb_perror_msg("nfs bindresvport"); | ||
1301 | goto fail; | ||
1302 | } | ||
1303 | if (port == 0) { | ||
1304 | server_addr.sin_port = PMAPPORT; | ||
1305 | port = pmap_getport(&server_addr, nfsprog, nfsvers, | ||
1306 | tcp ? IPPROTO_TCP : IPPROTO_UDP); | ||
1307 | if (port == 0) | ||
1308 | port = NFS_PORT; | ||
1309 | } | ||
1310 | server_addr.sin_port = htons(port); | ||
1311 | |||
1312 | /* prepare data structure for kernel */ | ||
1313 | |||
1314 | data.fd = fsock; | ||
1315 | memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr)); | ||
1316 | strncpy(data.hostname, hostname, sizeof(data.hostname)); | ||
1317 | |||
1318 | /* clean up */ | ||
1319 | |||
1320 | auth_destroy(mclient->cl_auth); | ||
1321 | clnt_destroy(mclient); | ||
1322 | close(msock); | ||
1323 | |||
1324 | if (bg) { | ||
1325 | /* We must wait until mount directory is available */ | ||
1326 | struct stat statbuf; | ||
1327 | int delay = 1; | ||
1328 | while (stat(mp->mnt_dir, &statbuf) == -1) { | ||
1329 | if (!daemonized) { | ||
1330 | daemonized = daemonize(); | ||
1331 | if (daemonized <= 0) { /* parent or error */ | ||
1332 | retval = -daemonized; | ||
1333 | goto ret; | ||
1334 | } | ||
1335 | } | ||
1336 | sleep(delay); /* 1, 2, 4, 8, 16, 30, ... */ | ||
1337 | delay *= 2; | ||
1338 | if (delay > 30) | ||
1339 | delay = 30; | ||
1340 | } | ||
1341 | } | ||
1342 | |||
1343 | do_mount: /* perform actual mount */ | ||
1344 | |||
1345 | mp->mnt_type = "nfs"; | ||
1346 | retval = mount_it_now(mp, vfsflags, (char*)&data); | ||
1347 | goto ret; | ||
1348 | |||
1349 | fail: /* abort */ | ||
1350 | |||
1351 | if (msock != -1) { | ||
1352 | if (mclient) { | ||
1353 | auth_destroy(mclient->cl_auth); | ||
1354 | clnt_destroy(mclient); | ||
1355 | } | ||
1356 | close(msock); | ||
1357 | } | ||
1358 | if (fsock != -1) | ||
1359 | close(fsock); | ||
1360 | |||
1361 | ret: | ||
1362 | free(hostname); | ||
1363 | free(mounthost); | ||
1364 | free(filteropts); | ||
1365 | return retval; | ||
1366 | } | ||
1367 | |||
1368 | #else /* !ENABLE_FEATURE_MOUNT_NFS */ | ||
1369 | |||
1370 | /* Never called. Call should be optimized out. */ | ||
1371 | int nfsmount(struct mntent *mp, int vfsflags, char *filteropts); | ||
1372 | |||
1373 | #endif /* !ENABLE_FEATURE_MOUNT_NFS */ | ||
1374 | |||
1375 | // Mount one directory. Handles CIFS, NFS, loopback, autobind, and filesystem | ||
1376 | // type detection. Returns 0 for success, nonzero for failure. | ||
1377 | // NB: mp->xxx fields may be trashed on exit | ||
1378 | static int singlemount(struct mntent *mp, int ignore_busy) | ||
1379 | { | ||
1380 | int rc = -1, vfsflags; | ||
1381 | char *loopFile = 0, *filteropts = 0; | ||
1382 | llist_t *fl = 0; | ||
1383 | struct stat st; | ||
1384 | |||
1385 | vfsflags = parse_mount_options(mp->mnt_opts, &filteropts); | ||
1386 | |||
1387 | // Treat fstype "auto" as unspecified. | ||
1388 | |||
1389 | if (mp->mnt_type && !strcmp(mp->mnt_type,"auto")) mp->mnt_type = 0; | ||
1390 | |||
1391 | // Might this be an CIFS filesystem? | ||
1392 | |||
1393 | if (ENABLE_FEATURE_MOUNT_CIFS && | ||
1394 | (!mp->mnt_type || !strcmp(mp->mnt_type,"cifs")) && | ||
1395 | (mp->mnt_fsname[0]==mp->mnt_fsname[1] && (mp->mnt_fsname[0]=='/' || mp->mnt_fsname[0]=='\\'))) | ||
1396 | { | ||
1397 | struct hostent *he; | ||
1398 | char ip[32], *s; | ||
1399 | |||
1400 | rc = 1; | ||
1401 | // Replace '/' with '\' and verify that unc points to "//server/share". | ||
1402 | |||
1403 | for (s = mp->mnt_fsname; *s; ++s) | ||
1404 | if (*s == '/') *s = '\\'; | ||
1405 | |||
1406 | // get server IP | ||
1407 | |||
1408 | s = strrchr(mp->mnt_fsname, '\\'); | ||
1409 | if (s == mp->mnt_fsname+1) goto report_error; | ||
1410 | *s = 0; | ||
1411 | he = gethostbyname(mp->mnt_fsname+2); | ||
1412 | *s = '\\'; | ||
1413 | if (!he) goto report_error; | ||
1414 | |||
1415 | // Insert ip=... option into string flags. (NOTE: Add IPv6 support.) | ||
1416 | |||
1417 | sprintf(ip, "ip=%d.%d.%d.%d", he->h_addr[0], he->h_addr[1], | ||
1418 | he->h_addr[2], he->h_addr[3]); | ||
1419 | parse_mount_options(ip, &filteropts); | ||
1420 | |||
1421 | // compose new unc '\\server-ip\share' | ||
1422 | |||
1423 | mp->mnt_fsname = xasprintf("\\\\%s%s", ip+3, | ||
1424 | strchr(mp->mnt_fsname+2,'\\')); | ||
1425 | |||
1426 | // lock is required | ||
1427 | vfsflags |= MS_MANDLOCK; | ||
1428 | |||
1429 | mp->mnt_type = "cifs"; | ||
1430 | rc = mount_it_now(mp, vfsflags, filteropts); | ||
1431 | if (ENABLE_FEATURE_CLEAN_UP) free(mp->mnt_fsname); | ||
1432 | goto report_error; | ||
1433 | } | ||
1434 | |||
1435 | // Might this be an NFS filesystem? | ||
1436 | |||
1437 | if (ENABLE_FEATURE_MOUNT_NFS && | ||
1438 | (!mp->mnt_type || !strcmp(mp->mnt_type,"nfs")) && | ||
1439 | strchr(mp->mnt_fsname, ':') != NULL) | ||
1440 | { | ||
1441 | rc = nfsmount(mp, vfsflags, filteropts); | ||
1442 | goto report_error; | ||
1443 | } | ||
1444 | |||
1445 | // Look at the file. (Not found isn't a failure for remount, or for | ||
1446 | // a synthetic filesystem like proc or sysfs.) | ||
1447 | |||
1448 | if (!lstat(mp->mnt_fsname, &st) && !(vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE))) | ||
1449 | { | ||
1450 | // Do we need to allocate a loopback device for it? | ||
1451 | |||
1452 | if (ENABLE_FEATURE_MOUNT_LOOP && S_ISREG(st.st_mode)) { | ||
1453 | loopFile = bb_simplify_path(mp->mnt_fsname); | ||
1454 | mp->mnt_fsname = 0; | ||
1455 | switch (set_loop(&(mp->mnt_fsname), loopFile, 0)) { | ||
1456 | case 0: | ||
1457 | case 1: | ||
1458 | break; | ||
1459 | default: | ||
1460 | bb_error_msg( errno == EPERM || errno == EACCES | ||
1461 | ? bb_msg_perm_denied_are_you_root | ||
1462 | : "cannot setup loop device"); | ||
1463 | return errno; | ||
1464 | } | ||
1465 | |||
1466 | // Autodetect bind mounts | ||
1467 | |||
1468 | } else if (S_ISDIR(st.st_mode) && !mp->mnt_type) | ||
1469 | vfsflags |= MS_BIND; | ||
1470 | } | ||
1471 | |||
1472 | /* If we know the fstype (or don't need to), jump straight | ||
1473 | * to the actual mount. */ | ||
1474 | |||
1475 | if (mp->mnt_type || (vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE))) | ||
1476 | rc = mount_it_now(mp, vfsflags, filteropts); | ||
1477 | |||
1478 | // Loop through filesystem types until mount succeeds or we run out | ||
1479 | |||
1480 | else { | ||
1481 | |||
1482 | /* Initialize list of block backed filesystems. This has to be | ||
1483 | * done here so that during "mount -a", mounts after /proc shows up | ||
1484 | * can autodetect. */ | ||
1485 | |||
1486 | if (!fslist) { | ||
1487 | fslist = get_block_backed_filesystems(); | ||
1488 | if (ENABLE_FEATURE_CLEAN_UP && fslist) | ||
1489 | atexit(delete_block_backed_filesystems); | ||
1490 | } | ||
1491 | |||
1492 | for (fl = fslist; fl; fl = fl->link) { | ||
1493 | mp->mnt_type = fl->data; | ||
1494 | rc = mount_it_now(mp, vfsflags, filteropts); | ||
1495 | if (!rc) break; | ||
1496 | } | ||
1497 | } | ||
1498 | |||
1499 | // If mount failed, clean up loop file (if any). | ||
1500 | |||
1501 | if (ENABLE_FEATURE_MOUNT_LOOP && rc && loopFile) { | ||
1502 | del_loop(mp->mnt_fsname); | ||
1503 | if (ENABLE_FEATURE_CLEAN_UP) { | ||
1504 | free(loopFile); | ||
1505 | free(mp->mnt_fsname); | ||
1506 | } | ||
1507 | } | ||
1508 | |||
1509 | report_error: | ||
1510 | if (ENABLE_FEATURE_CLEAN_UP) free(filteropts); | ||
1511 | |||
1512 | if (rc && errno == EBUSY && ignore_busy) rc = 0; | ||
1513 | if (rc < 0) | ||
1514 | /* perror here sometimes says "mounting ... on ... failed: Success" */ | ||
1515 | bb_error_msg("mounting %s on %s failed", mp->mnt_fsname, mp->mnt_dir); | ||
1516 | |||
1517 | return rc; | ||
1518 | } | ||
1519 | |||
1520 | // Parse options, if necessary parse fstab/mtab, and call singlemount for | ||
1521 | // each directory to be mounted. | ||
1522 | |||
1523 | const char must_be_root[] = "you must be root"; | ||
1524 | |||
1525 | int mount_main(int argc, char **argv) | ||
1526 | { | ||
1527 | enum { OPT_ALL = 0x10 }; | ||
1528 | |||
1529 | char *cmdopts = xstrdup(""), *fstype=0, *storage_path=0; | ||
1530 | char *opt_o; | ||
1531 | const char *fstabname; | ||
1532 | FILE *fstab; | ||
1533 | int i, j, rc = 0; | ||
1534 | unsigned opt; | ||
1535 | struct mntent mtpair[2], *mtcur = mtpair; | ||
1536 | SKIP_DESKTOP(const int nonroot = 0;) | ||
1537 | USE_DESKTOP( int nonroot = (getuid() != 0);) | ||
1538 | |||
1539 | /* parse long options, like --bind and --move. Note that -o option | ||
1540 | * and --option are synonymous. Yes, this means --remount,rw works. */ | ||
1541 | |||
1542 | for (i = j = 0; i < argc; i++) { | ||
1543 | if (argv[i][0] == '-' && argv[i][1] == '-') { | ||
1544 | append_mount_options(&cmdopts, argv[i]+2); | ||
1545 | } else argv[j++] = argv[i]; | ||
1546 | } | ||
1547 | argv[j] = 0; | ||
1548 | argc = j; | ||
1549 | |||
1550 | // Parse remaining options | ||
1551 | |||
1552 | opt = getopt32(argc, argv, "o:t:rwanfvs", &opt_o, &fstype); | ||
1553 | if (opt & 0x1) append_mount_options(&cmdopts, opt_o); // -o | ||
1554 | //if (opt & 0x2) // -t | ||
1555 | if (opt & 0x4) append_mount_options(&cmdopts, "ro"); // -r | ||
1556 | if (opt & 0x8) append_mount_options(&cmdopts, "rw"); // -w | ||
1557 | //if (opt & 0x10) // -a | ||
1558 | if (opt & 0x20) USE_FEATURE_MTAB_SUPPORT(useMtab = 0); // -n | ||
1559 | if (opt & 0x40) USE_FEATURE_MTAB_SUPPORT(fakeIt = 1); // -f | ||
1560 | //if (opt & 0x80) // -v: verbose (ignore) | ||
1561 | //if (opt & 0x100) // -s: sloppy (ignore) | ||
1562 | argv += optind; | ||
1563 | argc -= optind; | ||
1564 | |||
1565 | // Three or more non-option arguments? Die with a usage message. | ||
1566 | |||
1567 | if (argc > 2) bb_show_usage(); | ||
1568 | |||
1569 | // If we have no arguments, show currently mounted filesystems | ||
1570 | |||
1571 | if (!argc) { | ||
1572 | if (!(opt & OPT_ALL)) { | ||
1573 | FILE *mountTable = setmntent(bb_path_mtab_file, "r"); | ||
1574 | |||
1575 | if (!mountTable) bb_error_msg_and_die("no %s", bb_path_mtab_file); | ||
1576 | |||
1577 | while (getmntent_r(mountTable, mtpair, bb_common_bufsiz1, | ||
1578 | sizeof(bb_common_bufsiz1))) | ||
1579 | { | ||
1580 | // Don't show rootfs. FIXME: why?? | ||
1581 | // util-linux 2.12a happily shows rootfs... | ||
1582 | //if (!strcmp(mtpair->mnt_fsname, "rootfs")) continue; | ||
1583 | |||
1584 | if (!fstype || !strcmp(mtpair->mnt_type, fstype)) | ||
1585 | printf("%s on %s type %s (%s)\n", mtpair->mnt_fsname, | ||
1586 | mtpair->mnt_dir, mtpair->mnt_type, | ||
1587 | mtpair->mnt_opts); | ||
1588 | } | ||
1589 | if (ENABLE_FEATURE_CLEAN_UP) endmntent(mountTable); | ||
1590 | return EXIT_SUCCESS; | ||
1591 | } | ||
1592 | } else storage_path = bb_simplify_path(argv[0]); | ||
1593 | |||
1594 | // When we have two arguments, the second is the directory and we can | ||
1595 | // skip looking at fstab entirely. We can always abspath() the directory | ||
1596 | // argument when we get it. | ||
1597 | |||
1598 | if (argc == 2) { | ||
1599 | if (nonroot) | ||
1600 | bb_error_msg_and_die(must_be_root); | ||
1601 | mtpair->mnt_fsname = argv[0]; | ||
1602 | mtpair->mnt_dir = argv[1]; | ||
1603 | mtpair->mnt_type = fstype; | ||
1604 | mtpair->mnt_opts = cmdopts; | ||
1605 | rc = singlemount(mtpair, 0); | ||
1606 | goto clean_up; | ||
1607 | } | ||
1608 | |||
1609 | i = parse_mount_options(cmdopts, 0); | ||
1610 | if (nonroot && (i & ~MS_SILENT)) // Non-root users cannot specify flags | ||
1611 | bb_error_msg_and_die(must_be_root); | ||
1612 | |||
1613 | // If we have a shared subtree flag, don't worry about fstab or mtab. | ||
1614 | |||
1615 | if (ENABLE_FEATURE_MOUNT_FLAGS && | ||
1616 | (i & (MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE))) | ||
1617 | { | ||
1618 | rc = mount("", argv[0], "", i, ""); | ||
1619 | if (rc) bb_perror_msg_and_die("%s", argv[0]); | ||
1620 | goto clean_up; | ||
1621 | } | ||
1622 | |||
1623 | // Open either fstab or mtab | ||
1624 | |||
1625 | fstabname = "/etc/fstab"; | ||
1626 | if (i & MS_REMOUNT) { | ||
1627 | fstabname = bb_path_mtab_file; | ||
1628 | } | ||
1629 | fstab = setmntent(fstabname, "r"); | ||
1630 | if (!fstab) | ||
1631 | bb_perror_msg_and_die("cannot read %s", fstabname); | ||
1632 | |||
1633 | // Loop through entries until we find what we're looking for. | ||
1634 | |||
1635 | memset(mtpair, 0, sizeof(mtpair)); | ||
1636 | for (;;) { | ||
1637 | struct mntent *mtnext = (mtcur==mtpair ? mtpair+1 : mtpair); | ||
1638 | |||
1639 | // Get next fstab entry | ||
1640 | |||
1641 | if (!getmntent_r(fstab, mtcur, bb_common_bufsiz1 | ||
1642 | + (mtcur==mtpair ? sizeof(bb_common_bufsiz1)/2 : 0), | ||
1643 | sizeof(bb_common_bufsiz1)/2)) | ||
1644 | { | ||
1645 | // Were we looking for something specific? | ||
1646 | |||
1647 | if (argc) { | ||
1648 | |||
1649 | // If we didn't find anything, complain. | ||
1650 | |||
1651 | if (!mtnext->mnt_fsname) | ||
1652 | bb_error_msg_and_die("can't find %s in %s", | ||
1653 | argv[0], fstabname); | ||
1654 | |||
1655 | mtcur = mtnext; | ||
1656 | if (nonroot) { | ||
1657 | // fstab must have "users" or "user" | ||
1658 | if (!(parse_mount_options(mtcur->mnt_opts, 0) & MOUNT_USERS)) | ||
1659 | bb_error_msg_and_die(must_be_root); | ||
1660 | } | ||
1661 | |||
1662 | // Mount the last thing we found. | ||
1663 | |||
1664 | mtcur->mnt_opts = xstrdup(mtcur->mnt_opts); | ||
1665 | append_mount_options(&(mtcur->mnt_opts), cmdopts); | ||
1666 | rc = singlemount(mtcur, 0); | ||
1667 | free(mtcur->mnt_opts); | ||
1668 | } | ||
1669 | goto clean_up; | ||
1670 | } | ||
1671 | |||
1672 | /* If we're trying to mount something specific and this isn't it, | ||
1673 | * skip it. Note we must match both the exact text in fstab (ala | ||
1674 | * "proc") or a full path from root */ | ||
1675 | |||
1676 | if (argc) { | ||
1677 | |||
1678 | // Is this what we're looking for? | ||
1679 | |||
1680 | if (strcmp(argv[0], mtcur->mnt_fsname) && | ||
1681 | strcmp(storage_path, mtcur->mnt_fsname) && | ||
1682 | strcmp(argv[0], mtcur->mnt_dir) && | ||
1683 | strcmp(storage_path, mtcur->mnt_dir)) continue; | ||
1684 | |||
1685 | // Remember this entry. Something later may have overmounted | ||
1686 | // it, and we want the _last_ match. | ||
1687 | |||
1688 | mtcur = mtnext; | ||
1689 | |||
1690 | // If we're mounting all. | ||
1691 | |||
1692 | } else { | ||
1693 | // Do we need to match a filesystem type? | ||
1694 | // TODO: support "-t type1,type2"; "-t notype1,type2" | ||
1695 | |||
1696 | if (fstype && strcmp(mtcur->mnt_type, fstype)) continue; | ||
1697 | |||
1698 | // Skip noauto and swap anyway. | ||
1699 | |||
1700 | if (parse_mount_options(mtcur->mnt_opts, 0) | ||
1701 | & (MOUNT_NOAUTO | MOUNT_SWAP)) continue; | ||
1702 | |||
1703 | // No, mount -a won't mount anything, | ||
1704 | // even user mounts, for mere humans. | ||
1705 | |||
1706 | if (nonroot) | ||
1707 | bb_error_msg_and_die(must_be_root); | ||
1708 | |||
1709 | // Mount this thing. | ||
1710 | |||
1711 | // NFS mounts want this to be xrealloc-able | ||
1712 | mtcur->mnt_opts = xstrdup(mtcur->mnt_opts); | ||
1713 | if (singlemount(mtcur, 1)) { | ||
1714 | /* Count number of failed mounts */ | ||
1715 | rc++; | ||
1716 | } | ||
1717 | free(mtcur->mnt_opts); | ||
1718 | } | ||
1719 | } | ||
1720 | if (ENABLE_FEATURE_CLEAN_UP) endmntent(fstab); | ||
1721 | |||
1722 | clean_up: | ||
1723 | |||
1724 | if (ENABLE_FEATURE_CLEAN_UP) { | ||
1725 | free(storage_path); | ||
1726 | free(cmdopts); | ||
1727 | } | ||
1728 | |||
1729 | return rc; | ||
1730 | } |