blob: 6414988b49e2a2ea5ff446de77efd838cfc127dc
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * fsck --- A generic, parallelizing front-end for the fsck program. |
4 | * It will automatically try to run fsck programs in parallel if the |
5 | * devices are on separate spindles. It is based on the same ideas as |
6 | * the generic front end for fsck by David Engel and Fred van Kempen, |
7 | * but it has been completely rewritten from scratch to support |
8 | * parallel execution. |
9 | * |
10 | * Written by Theodore Ts'o, <tytso@mit.edu> |
11 | * |
12 | * Miquel van Smoorenburg (miquels@drinkel.ow.org) 20-Oct-1994: |
13 | * o Changed -t fstype to behave like with mount when -A (all file |
14 | * systems) or -M (like mount) is specified. |
15 | * o fsck looks if it can find the fsck.type program to decide |
16 | * if it should ignore the fs type. This way more fsck programs |
17 | * can be added without changing this front-end. |
18 | * o -R flag skip root file system. |
19 | * |
20 | * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
21 | * 2001, 2002, 2003, 2004, 2005 by Theodore Ts'o. |
22 | * |
23 | * Licensed under GPLv2, see file LICENSE in this source tree. |
24 | */ |
25 | |
26 | /* All filesystem specific hooks have been removed. |
27 | * If filesystem cannot be determined, we will execute |
28 | * "fsck.auto". Currently this also happens if you specify |
29 | * UUID=xxx or LABEL=xxx as an object to check. |
30 | * Detection code for that is also probably has to be in fsck.auto. |
31 | * |
32 | * In other words, this is _really_ is just a driver program which |
33 | * spawns actual fsck.something for each filesystem to check. |
34 | * It doesn't guess filesystem types from on-disk format. |
35 | */ |
36 | //config:config FSCK |
37 | //config: bool "fsck" |
38 | //config: default y |
39 | //config: help |
40 | //config: fsck is used to check and optionally repair one or more filesystems. |
41 | //config: In actuality, fsck is simply a front-end for the various file system |
42 | //config: checkers (fsck.fstype) available under Linux. |
43 | |
44 | //applet:IF_FSCK(APPLET(fsck, BB_DIR_SBIN, BB_SUID_DROP)) |
45 | |
46 | //kbuild:lib-$(CONFIG_FSCK) += fsck.o |
47 | |
48 | //usage:#define fsck_trivial_usage |
49 | //usage: "[-ANPRTV] [-t FSTYPE] [FS_OPTS] [BLOCKDEV]..." |
50 | //usage:#define fsck_full_usage "\n\n" |
51 | //usage: "Check and repair filesystems\n" |
52 | //usage: "\n -A Walk /etc/fstab and check all filesystems" |
53 | //usage: "\n -N Don't execute, just show what would be done" |
54 | //usage: "\n -P With -A, check filesystems in parallel" |
55 | //usage: "\n -R With -A, skip the root filesystem" |
56 | //usage: "\n -T Don't show title on startup" |
57 | //usage: "\n -V Verbose" |
58 | //DO_PROGRESS_INDICATOR is off: |
59 | ////usage: "\n -C FD Write status information to specified file descriptor" |
60 | //usage: "\n -t TYPE List of filesystem types to check" |
61 | |
62 | #include "libbb.h" |
63 | #include "common_bufsiz.h" |
64 | |
65 | /* "progress indicator" code is somewhat buggy and ext[23] specific. |
66 | * We should be filesystem agnostic. IOW: there should be a well-defined |
67 | * API for fsck.something, NOT ad-hoc hacks in generic fsck. */ |
68 | #define DO_PROGRESS_INDICATOR 0 |
69 | |
70 | /* fsck 1.41.4 (27-Jan-2009) manpage says: |
71 | * 0 - No errors |
72 | * 1 - File system errors corrected |
73 | * 2 - System should be rebooted |
74 | * 4 - File system errors left uncorrected |
75 | * 8 - Operational error |
76 | * 16 - Usage or syntax error |
77 | * 32 - Fsck canceled by user request |
78 | * 128 - Shared library error |
79 | */ |
80 | #define EXIT_OK 0 |
81 | #define EXIT_NONDESTRUCT 1 |
82 | #define EXIT_DESTRUCT 2 |
83 | #define EXIT_UNCORRECTED 4 |
84 | #define EXIT_ERROR 8 |
85 | #define EXIT_USAGE 16 |
86 | #define FSCK_CANCELED 32 /* Aborted with a signal or ^C */ |
87 | |
88 | /* |
89 | * Internal structure for mount table entries. |
90 | */ |
91 | struct fs_info { |
92 | struct fs_info *next; |
93 | char *device; |
94 | char *mountpt; |
95 | char *type; |
96 | char *opts; |
97 | int passno; |
98 | int flags; |
99 | }; |
100 | |
101 | #define FLAG_DONE 1 |
102 | #define FLAG_PROGRESS 2 |
103 | /* |
104 | * Structure to allow exit codes to be stored |
105 | */ |
106 | struct fsck_instance { |
107 | struct fsck_instance *next; |
108 | int pid; |
109 | int flags; |
110 | #if DO_PROGRESS_INDICATOR |
111 | time_t start_time; |
112 | #endif |
113 | char *prog; |
114 | char *device; |
115 | char *base_device; /* /dev/hda for /dev/hdaN etc */ |
116 | }; |
117 | |
118 | static const char ignored_types[] ALIGN1 = |
119 | "ignore\0" |
120 | "iso9660\0" |
121 | "nfs\0" |
122 | "proc\0" |
123 | "sw\0" |
124 | "swap\0" |
125 | "tmpfs\0" |
126 | "devpts\0"; |
127 | |
128 | #if 0 |
129 | static const char really_wanted[] ALIGN1 = |
130 | "minix\0" |
131 | "ext2\0" |
132 | "ext3\0" |
133 | "jfs\0" |
134 | "reiserfs\0" |
135 | "xiafs\0" |
136 | "xfs\0"; |
137 | #endif |
138 | |
139 | #define BASE_MD "/dev/md" |
140 | |
141 | struct globals { |
142 | char **args; |
143 | int num_args; |
144 | int verbose; |
145 | |
146 | #define FS_TYPE_FLAG_NORMAL 0 |
147 | #define FS_TYPE_FLAG_OPT 1 |
148 | #define FS_TYPE_FLAG_NEGOPT 2 |
149 | char **fs_type_list; |
150 | uint8_t *fs_type_flag; |
151 | smallint fs_type_negated; |
152 | |
153 | smallint noexecute; |
154 | smallint serialize; |
155 | smallint skip_root; |
156 | /* smallint like_mount; */ |
157 | smallint parallel_root; |
158 | smallint force_all_parallel; |
159 | smallint kill_sent; |
160 | |
161 | #if DO_PROGRESS_INDICATOR |
162 | smallint progress; |
163 | int progress_fd; |
164 | #endif |
165 | |
166 | int num_running; |
167 | int max_running; |
168 | char *fstype; |
169 | struct fs_info *filesys_info; |
170 | struct fs_info *filesys_last; |
171 | struct fsck_instance *instance_list; |
172 | } FIX_ALIASING; |
173 | #define G (*(struct globals*)bb_common_bufsiz1) |
174 | #define INIT_G() do { \ |
175 | setup_common_bufsiz(); \ |
176 | BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \ |
177 | } while (0) |
178 | |
179 | /* |
180 | * Return the "base device" given a particular device; this is used to |
181 | * assure that we only fsck one partition on a particular drive at any |
182 | * one time. Otherwise, the disk heads will be seeking all over the |
183 | * place. If the base device cannot be determined, return NULL. |
184 | * |
185 | * The base_device() function returns an allocated string which must |
186 | * be freed. |
187 | */ |
188 | #if ENABLE_FEATURE_DEVFS |
189 | /* |
190 | * Required for the uber-silly devfs /dev/ide/host1/bus2/target3/lun3 |
191 | * pathames. |
192 | */ |
193 | static const char *const devfs_hier[] = { |
194 | "host", "bus", "target", "lun", NULL |
195 | }; |
196 | #endif |
197 | |
198 | static char *base_device(const char *device) |
199 | { |
200 | char *str, *cp; |
201 | #if ENABLE_FEATURE_DEVFS |
202 | const char *const *hier; |
203 | const char *disk; |
204 | int len; |
205 | #endif |
206 | str = xstrdup(device); |
207 | |
208 | /* Skip over "/dev/"; if it's not present, give up */ |
209 | cp = skip_dev_pfx(str); |
210 | if (cp == str) |
211 | goto errout; |
212 | |
213 | /* |
214 | * For md devices, we treat them all as if they were all |
215 | * on one disk, since we don't know how to parallelize them. |
216 | */ |
217 | if (cp[0] == 'm' && cp[1] == 'd') { |
218 | cp[2] = 0; |
219 | return str; |
220 | } |
221 | |
222 | /* Handle DAC 960 devices */ |
223 | if (is_prefixed_with(cp, "rd/")) { |
224 | cp += 3; |
225 | if (cp[0] != 'c' || !isdigit(cp[1]) |
226 | || cp[2] != 'd' || !isdigit(cp[3])) |
227 | goto errout; |
228 | cp[4] = 0; |
229 | return str; |
230 | } |
231 | |
232 | /* Now let's handle /dev/hd* and /dev/sd* devices.... */ |
233 | if ((cp[0] == 'h' || cp[0] == 's') && cp[1] == 'd') { |
234 | cp += 2; |
235 | /* If there's a single number after /dev/hd, skip it */ |
236 | if (isdigit(*cp)) |
237 | cp++; |
238 | /* What follows must be an alpha char, or give up */ |
239 | if (!isalpha(*cp)) |
240 | goto errout; |
241 | cp[1] = 0; |
242 | return str; |
243 | } |
244 | |
245 | #if ENABLE_FEATURE_DEVFS |
246 | /* Now let's handle devfs (ugh) names */ |
247 | len = 0; |
248 | if (is_prefixed_with(cp, "ide/")) |
249 | len = 4; |
250 | if (is_prefixed_with(cp, "scsi/")) |
251 | len = 5; |
252 | if (len) { |
253 | cp += len; |
254 | /* |
255 | * Now we proceed down the expected devfs hierarchy. |
256 | * i.e., .../host1/bus2/target3/lun4/... |
257 | * If we don't find the expected token, followed by |
258 | * some number of digits at each level, abort. |
259 | */ |
260 | for (hier = devfs_hier; *hier; hier++) { |
261 | cp = is_prefixed_with(cp, *hier); |
262 | if (!cp) |
263 | goto errout; |
264 | while (*cp != '/' && *cp != '\0') { |
265 | if (!isdigit(*cp)) |
266 | goto errout; |
267 | cp++; |
268 | } |
269 | //FIXME: what if *cp = '\0' now? cp++ moves past it!!! |
270 | cp++; |
271 | } |
272 | cp[-1] = '\0'; |
273 | return str; |
274 | } |
275 | |
276 | /* Now handle devfs /dev/disc or /dev/disk names */ |
277 | disk = NULL; |
278 | if (is_prefixed_with(cp, "discs/")) |
279 | disk = "disc"; |
280 | else if (is_prefixed_with(cp, "disks/")) |
281 | disk = "disk"; |
282 | if (disk) { |
283 | cp += 6; |
284 | cp = is_prefixed_with(cp, disk); |
285 | if (!cp) |
286 | goto errout; |
287 | while (*cp != '/' && *cp != '\0') { |
288 | if (!isdigit(*cp)) |
289 | goto errout; |
290 | cp++; |
291 | } |
292 | *cp = '\0'; |
293 | return str; |
294 | } |
295 | #endif |
296 | errout: |
297 | free(str); |
298 | return NULL; |
299 | } |
300 | |
301 | static void free_instance(struct fsck_instance *p) |
302 | { |
303 | free(p->prog); |
304 | free(p->device); |
305 | free(p->base_device); |
306 | free(p); |
307 | } |
308 | |
309 | static struct fs_info *create_fs_device(const char *device, const char *mntpnt, |
310 | const char *type, const char *opts, |
311 | int passno) |
312 | { |
313 | struct fs_info *fs; |
314 | |
315 | fs = xzalloc(sizeof(*fs)); |
316 | fs->device = xstrdup(device); |
317 | fs->mountpt = xstrdup(mntpnt); |
318 | if (strchr(type, ',')) |
319 | type = (char *)"auto"; |
320 | fs->type = xstrdup(type); |
321 | fs->opts = xstrdup(opts ? opts : ""); |
322 | fs->passno = passno < 0 ? 1 : passno; |
323 | /*fs->flags = 0; */ |
324 | /*fs->next = NULL; */ |
325 | |
326 | if (!G.filesys_info) |
327 | G.filesys_info = fs; |
328 | else |
329 | G.filesys_last->next = fs; |
330 | G.filesys_last = fs; |
331 | |
332 | return fs; |
333 | } |
334 | |
335 | /* Load the filesystem database from /etc/fstab */ |
336 | static void load_fs_info(const char *filename) |
337 | { |
338 | FILE *fstab; |
339 | struct mntent mte; |
340 | char buf[1024]; |
341 | |
342 | fstab = setmntent(filename, "r"); |
343 | if (!fstab) { |
344 | bb_perror_msg("can't read '%s'", filename); |
345 | return; |
346 | } |
347 | |
348 | // Loop through entries |
349 | while (getmntent_r(fstab, &mte, buf, sizeof(buf))) { |
350 | //bb_error_msg("CREATE[%s][%s][%s][%s][%d]", mte.mnt_fsname, mte.mnt_dir, |
351 | // mte.mnt_type, mte.mnt_opts, |
352 | // mte.mnt_passno); |
353 | create_fs_device(mte.mnt_fsname, mte.mnt_dir, |
354 | mte.mnt_type, mte.mnt_opts, |
355 | mte.mnt_passno); |
356 | } |
357 | endmntent(fstab); |
358 | } |
359 | |
360 | /* Lookup filesys in /etc/fstab and return the corresponding entry. */ |
361 | static struct fs_info *lookup(char *filesys) |
362 | { |
363 | struct fs_info *fs; |
364 | |
365 | for (fs = G.filesys_info; fs; fs = fs->next) { |
366 | if (strcmp(filesys, fs->device) == 0 |
367 | || (fs->mountpt && strcmp(filesys, fs->mountpt) == 0) |
368 | ) |
369 | break; |
370 | } |
371 | |
372 | return fs; |
373 | } |
374 | |
375 | #if DO_PROGRESS_INDICATOR |
376 | static int progress_active(void) |
377 | { |
378 | struct fsck_instance *inst; |
379 | |
380 | for (inst = G.instance_list; inst; inst = inst->next) { |
381 | if (inst->flags & FLAG_DONE) |
382 | continue; |
383 | if (inst->flags & FLAG_PROGRESS) |
384 | return 1; |
385 | } |
386 | return 0; |
387 | } |
388 | #endif |
389 | |
390 | |
391 | /* |
392 | * Send a signal to all outstanding fsck child processes |
393 | */ |
394 | static void kill_all_if_got_signal(void) |
395 | { |
396 | struct fsck_instance *inst; |
397 | |
398 | if (!bb_got_signal || G.kill_sent) |
399 | return; |
400 | |
401 | for (inst = G.instance_list; inst; inst = inst->next) { |
402 | if (inst->flags & FLAG_DONE) |
403 | continue; |
404 | kill(inst->pid, SIGTERM); |
405 | } |
406 | G.kill_sent = 1; |
407 | } |
408 | |
409 | /* |
410 | * Wait for one child process to exit; when it does, unlink it from |
411 | * the list of executing child processes, free, and return its exit status. |
412 | * If there is no exited child, return -1. |
413 | */ |
414 | static int wait_one(int flags) |
415 | { |
416 | int status; |
417 | int sig; |
418 | struct fsck_instance *inst, *prev; |
419 | pid_t pid; |
420 | |
421 | if (!G.instance_list) |
422 | return -1; |
423 | /* if (G.noexecute) { already returned -1; } */ |
424 | |
425 | while (1) { |
426 | pid = waitpid(-1, &status, flags); |
427 | kill_all_if_got_signal(); |
428 | if (pid == 0) /* flags == WNOHANG and no children exited */ |
429 | return -1; |
430 | if (pid < 0) { |
431 | if (errno == EINTR) |
432 | continue; |
433 | if (errno == ECHILD) { /* paranoia */ |
434 | bb_error_msg("wait: no more children"); |
435 | return -1; |
436 | } |
437 | bb_perror_msg("wait"); |
438 | continue; |
439 | } |
440 | prev = NULL; |
441 | inst = G.instance_list; |
442 | do { |
443 | if (inst->pid == pid) |
444 | goto child_died; |
445 | prev = inst; |
446 | inst = inst->next; |
447 | } while (inst); |
448 | } |
449 | child_died: |
450 | |
451 | status = WEXITSTATUS(status); |
452 | if (WIFSIGNALED(status)) { |
453 | sig = WTERMSIG(status); |
454 | status = EXIT_UNCORRECTED; |
455 | if (sig != SIGINT) { |
456 | printf("Warning: %s %s terminated " |
457 | "by signal %d\n", |
458 | inst->prog, inst->device, sig); |
459 | status = EXIT_ERROR; |
460 | } |
461 | } |
462 | |
463 | #if DO_PROGRESS_INDICATOR |
464 | if (progress && (inst->flags & FLAG_PROGRESS) && !progress_active()) { |
465 | struct fsck_instance *inst2; |
466 | for (inst2 = G.instance_list; inst2; inst2 = inst2->next) { |
467 | if (inst2->flags & FLAG_DONE) |
468 | continue; |
469 | if (strcmp(inst2->type, "ext2") != 0 |
470 | && strcmp(inst2->type, "ext3") != 0 |
471 | ) { |
472 | continue; |
473 | } |
474 | /* ext[23], we will send USR1 |
475 | * (request to start displaying progress bar) |
476 | * |
477 | * If we've just started the fsck, wait a tiny |
478 | * bit before sending the kill, to give it |
479 | * time to set up the signal handler |
480 | */ |
481 | if (inst2->start_time >= time(NULL) - 1) |
482 | sleep(1); |
483 | kill(inst2->pid, SIGUSR1); |
484 | inst2->flags |= FLAG_PROGRESS; |
485 | break; |
486 | } |
487 | } |
488 | #endif |
489 | |
490 | if (prev) |
491 | prev->next = inst->next; |
492 | else |
493 | G.instance_list = inst->next; |
494 | if (G.verbose > 1) |
495 | printf("Finished with %s (exit status %d)\n", |
496 | inst->device, status); |
497 | G.num_running--; |
498 | free_instance(inst); |
499 | |
500 | return status; |
501 | } |
502 | |
503 | /* |
504 | * Wait until all executing child processes have exited; return the |
505 | * logical OR of all of their exit code values. |
506 | */ |
507 | #define FLAG_WAIT_ALL 0 |
508 | #define FLAG_WAIT_ATLEAST_ONE WNOHANG |
509 | static int wait_many(int flags) |
510 | { |
511 | int exit_status; |
512 | int global_status = 0; |
513 | int wait_flags = 0; |
514 | |
515 | while ((exit_status = wait_one(wait_flags)) != -1) { |
516 | global_status |= exit_status; |
517 | wait_flags |= flags; |
518 | } |
519 | return global_status; |
520 | } |
521 | |
522 | /* |
523 | * Execute a particular fsck program, and link it into the list of |
524 | * child processes we are waiting for. |
525 | */ |
526 | static void execute(const char *type, const char *device, |
527 | const char *mntpt /*, int interactive */) |
528 | { |
529 | int i; |
530 | struct fsck_instance *inst; |
531 | pid_t pid; |
532 | |
533 | G.args[0] = xasprintf("fsck.%s", type); |
534 | |
535 | #if DO_PROGRESS_INDICATOR |
536 | if (progress && !progress_active()) { |
537 | if (strcmp(type, "ext2") == 0 |
538 | || strcmp(type, "ext3") == 0 |
539 | ) { |
540 | G.args[XXX] = xasprintf("-C%d", progress_fd); /* 1 */ |
541 | inst->flags |= FLAG_PROGRESS; |
542 | } |
543 | } |
544 | #endif |
545 | |
546 | G.args[G.num_args - 2] = (char*)device; |
547 | /* G.args[G.num_args - 1] = NULL; - already is */ |
548 | |
549 | if (G.verbose || G.noexecute) { |
550 | printf("[%s (%d) -- %s]", G.args[0], G.num_running, |
551 | mntpt ? mntpt : device); |
552 | for (i = 0; G.args[i]; i++) |
553 | printf(" %s", G.args[i]); |
554 | bb_putchar('\n'); |
555 | } |
556 | |
557 | /* Fork and execute the correct program. */ |
558 | pid = -1; |
559 | if (!G.noexecute) { |
560 | pid = spawn(G.args); |
561 | if (pid < 0) |
562 | bb_simple_perror_msg(G.args[0]); |
563 | } |
564 | |
565 | #if DO_PROGRESS_INDICATOR |
566 | free(G.args[XXX]); |
567 | #endif |
568 | |
569 | /* No child, so don't record an instance */ |
570 | if (pid <= 0) { |
571 | free(G.args[0]); |
572 | return; |
573 | } |
574 | |
575 | inst = xzalloc(sizeof(*inst)); |
576 | inst->pid = pid; |
577 | inst->prog = G.args[0]; |
578 | inst->device = xstrdup(device); |
579 | inst->base_device = base_device(device); |
580 | #if DO_PROGRESS_INDICATOR |
581 | inst->start_time = time(NULL); |
582 | #endif |
583 | |
584 | /* Add to the list of running fsck's. |
585 | * (was adding to the end, but adding to the front is simpler...) */ |
586 | inst->next = G.instance_list; |
587 | G.instance_list = inst; |
588 | } |
589 | |
590 | /* |
591 | * Run the fsck program on a particular device |
592 | * |
593 | * If the type is specified using -t, and it isn't prefixed with "no" |
594 | * (as in "noext2") and only one filesystem type is specified, then |
595 | * use that type regardless of what is specified in /etc/fstab. |
596 | * |
597 | * If the type isn't specified by the user, then use either the type |
598 | * specified in /etc/fstab, or "auto". |
599 | */ |
600 | static void fsck_device(struct fs_info *fs /*, int interactive */) |
601 | { |
602 | const char *type; |
603 | |
604 | if (strcmp(fs->type, "auto") != 0) { |
605 | type = fs->type; |
606 | if (G.verbose > 2) |
607 | printf("using filesystem type '%s' %s\n", |
608 | type, "from fstab"); |
609 | } else if (G.fstype |
610 | && (G.fstype[0] != 'n' || G.fstype[1] != 'o') /* != "no" */ |
611 | && !is_prefixed_with(G.fstype, "opts=") |
612 | && !is_prefixed_with(G.fstype, "loop") |
613 | && !strchr(G.fstype, ',') |
614 | ) { |
615 | type = G.fstype; |
616 | if (G.verbose > 2) |
617 | printf("using filesystem type '%s' %s\n", |
618 | type, "from -t"); |
619 | } else { |
620 | type = "auto"; |
621 | if (G.verbose > 2) |
622 | printf("using filesystem type '%s' %s\n", |
623 | type, "(default)"); |
624 | } |
625 | |
626 | G.num_running++; |
627 | execute(type, fs->device, fs->mountpt /*, interactive */); |
628 | } |
629 | |
630 | /* |
631 | * Returns TRUE if a partition on the same disk is already being |
632 | * checked. |
633 | */ |
634 | static int device_already_active(char *device) |
635 | { |
636 | struct fsck_instance *inst; |
637 | char *base; |
638 | |
639 | if (G.force_all_parallel) |
640 | return 0; |
641 | |
642 | #ifdef BASE_MD |
643 | /* Don't check a soft raid disk with any other disk */ |
644 | if (G.instance_list |
645 | && (is_prefixed_with(G.instance_list->device, BASE_MD) |
646 | || is_prefixed_with(device, BASE_MD)) |
647 | ) { |
648 | return 1; |
649 | } |
650 | #endif |
651 | |
652 | base = base_device(device); |
653 | /* |
654 | * If we don't know the base device, assume that the device is |
655 | * already active if there are any fsck instances running. |
656 | */ |
657 | if (!base) |
658 | return (G.instance_list != NULL); |
659 | |
660 | for (inst = G.instance_list; inst; inst = inst->next) { |
661 | if (!inst->base_device || strcmp(base, inst->base_device) == 0) { |
662 | free(base); |
663 | return 1; |
664 | } |
665 | } |
666 | |
667 | free(base); |
668 | return 0; |
669 | } |
670 | |
671 | /* |
672 | * This function returns true if a particular option appears in a |
673 | * comma-delimited options list |
674 | */ |
675 | static int opt_in_list(char *opt, char *optlist) |
676 | { |
677 | char *s; |
678 | int len; |
679 | |
680 | if (!optlist) |
681 | return 0; |
682 | |
683 | len = strlen(opt); |
684 | s = optlist - 1; |
685 | while (1) { |
686 | s = strstr(s + 1, opt); |
687 | if (!s) |
688 | return 0; |
689 | /* neither "opt.." nor "xxx,opt.."? */ |
690 | if (s != optlist && s[-1] != ',') |
691 | continue; |
692 | /* neither "..opt" nor "..opt,xxx"? */ |
693 | if (s[len] != '\0' && s[len] != ',') |
694 | continue; |
695 | return 1; |
696 | } |
697 | } |
698 | |
699 | /* See if the filesystem matches the criteria given by the -t option */ |
700 | static int fs_match(struct fs_info *fs) |
701 | { |
702 | int n, ret, checked_type; |
703 | char *cp; |
704 | |
705 | if (!G.fs_type_list) |
706 | return 1; |
707 | |
708 | ret = 0; |
709 | checked_type = 0; |
710 | n = 0; |
711 | while (1) { |
712 | cp = G.fs_type_list[n]; |
713 | if (!cp) |
714 | break; |
715 | switch (G.fs_type_flag[n]) { |
716 | case FS_TYPE_FLAG_NORMAL: |
717 | checked_type++; |
718 | if (strcmp(cp, fs->type) == 0) |
719 | ret = 1; |
720 | break; |
721 | case FS_TYPE_FLAG_NEGOPT: |
722 | if (opt_in_list(cp, fs->opts)) |
723 | return 0; |
724 | break; |
725 | case FS_TYPE_FLAG_OPT: |
726 | if (!opt_in_list(cp, fs->opts)) |
727 | return 0; |
728 | break; |
729 | } |
730 | n++; |
731 | } |
732 | if (checked_type == 0) |
733 | return 1; |
734 | |
735 | return (G.fs_type_negated ? !ret : ret); |
736 | } |
737 | |
738 | /* Check if we should ignore this filesystem. */ |
739 | static int ignore(struct fs_info *fs) |
740 | { |
741 | /* |
742 | * If the pass number is 0, ignore it. |
743 | */ |
744 | if (fs->passno == 0) |
745 | return 1; |
746 | |
747 | /* |
748 | * If a specific fstype is specified, and it doesn't match, |
749 | * ignore it. |
750 | */ |
751 | if (!fs_match(fs)) |
752 | return 1; |
753 | |
754 | /* Are we ignoring this type? */ |
755 | if (index_in_strings(ignored_types, fs->type) >= 0) |
756 | return 1; |
757 | |
758 | /* We can and want to check this file system type. */ |
759 | return 0; |
760 | } |
761 | |
762 | /* Check all file systems, using the /etc/fstab table. */ |
763 | static int check_all(void) |
764 | { |
765 | struct fs_info *fs; |
766 | int status = EXIT_OK; |
767 | smallint not_done_yet; |
768 | smallint pass_done; |
769 | int passno; |
770 | |
771 | if (G.verbose) |
772 | puts("Checking all filesystems"); |
773 | |
774 | /* |
775 | * Do an initial scan over the filesystem; mark filesystems |
776 | * which should be ignored as done, and resolve any "auto" |
777 | * filesystem types (done as a side-effect of calling ignore()). |
778 | */ |
779 | for (fs = G.filesys_info; fs; fs = fs->next) |
780 | if (ignore(fs)) |
781 | fs->flags |= FLAG_DONE; |
782 | |
783 | /* |
784 | * Find and check the root filesystem. |
785 | */ |
786 | if (!G.parallel_root) { |
787 | for (fs = G.filesys_info; fs; fs = fs->next) { |
788 | if (LONE_CHAR(fs->mountpt, '/')) { |
789 | if (!G.skip_root && !ignore(fs)) { |
790 | fsck_device(fs /*, 1*/); |
791 | status |= wait_many(FLAG_WAIT_ALL); |
792 | if (status > EXIT_NONDESTRUCT) |
793 | return status; |
794 | } |
795 | fs->flags |= FLAG_DONE; |
796 | break; |
797 | } |
798 | } |
799 | } |
800 | /* |
801 | * This is for the bone-headed user who has root |
802 | * filesystem listed twice. |
803 | * "Skip root" will skip _all_ root entries. |
804 | */ |
805 | if (G.skip_root) |
806 | for (fs = G.filesys_info; fs; fs = fs->next) |
807 | if (LONE_CHAR(fs->mountpt, '/')) |
808 | fs->flags |= FLAG_DONE; |
809 | |
810 | not_done_yet = 1; |
811 | passno = 1; |
812 | while (not_done_yet) { |
813 | not_done_yet = 0; |
814 | pass_done = 1; |
815 | |
816 | for (fs = G.filesys_info; fs; fs = fs->next) { |
817 | if (bb_got_signal) |
818 | break; |
819 | if (fs->flags & FLAG_DONE) |
820 | continue; |
821 | /* |
822 | * If the filesystem's pass number is higher |
823 | * than the current pass number, then we didn't |
824 | * do it yet. |
825 | */ |
826 | if (fs->passno > passno) { |
827 | not_done_yet = 1; |
828 | continue; |
829 | } |
830 | /* |
831 | * If a filesystem on a particular device has |
832 | * already been spawned, then we need to defer |
833 | * this to another pass. |
834 | */ |
835 | if (device_already_active(fs->device)) { |
836 | pass_done = 0; |
837 | continue; |
838 | } |
839 | /* |
840 | * Spawn off the fsck process |
841 | */ |
842 | fsck_device(fs /*, G.serialize*/); |
843 | fs->flags |= FLAG_DONE; |
844 | |
845 | /* |
846 | * Only do one filesystem at a time, or if we |
847 | * have a limit on the number of fsck's extant |
848 | * at one time, apply that limit. |
849 | */ |
850 | if (G.serialize |
851 | || (G.num_running >= G.max_running) |
852 | ) { |
853 | pass_done = 0; |
854 | break; |
855 | } |
856 | } |
857 | if (bb_got_signal) |
858 | break; |
859 | if (G.verbose > 1) |
860 | printf("--waiting-- (pass %d)\n", passno); |
861 | status |= wait_many(pass_done ? FLAG_WAIT_ALL : |
862 | FLAG_WAIT_ATLEAST_ONE); |
863 | if (pass_done) { |
864 | if (G.verbose > 1) |
865 | puts("----------------------------------"); |
866 | passno++; |
867 | } else |
868 | not_done_yet = 1; |
869 | } |
870 | kill_all_if_got_signal(); |
871 | status |= wait_many(FLAG_WAIT_ATLEAST_ONE); |
872 | return status; |
873 | } |
874 | |
875 | /* |
876 | * Deal with the fsck -t argument. |
877 | * Huh, for mount "-t novfat,nfs" means "neither vfat nor nfs"! |
878 | * Why here we require "-t novfat,nonfs" ?? |
879 | */ |
880 | static void compile_fs_type(char *fs_type) |
881 | { |
882 | char *s; |
883 | int num = 2; |
884 | smallint negate; |
885 | |
886 | s = fs_type; |
887 | while ((s = strchr(s, ','))) { |
888 | num++; |
889 | s++; |
890 | } |
891 | |
892 | G.fs_type_list = xzalloc(num * sizeof(G.fs_type_list[0])); |
893 | G.fs_type_flag = xzalloc(num * sizeof(G.fs_type_flag[0])); |
894 | G.fs_type_negated = -1; /* not yet known is it negated or not */ |
895 | |
896 | num = 0; |
897 | s = fs_type; |
898 | while (1) { |
899 | char *comma; |
900 | |
901 | negate = 0; |
902 | if (s[0] == 'n' && s[1] == 'o') { /* "no.." */ |
903 | s += 2; |
904 | negate = 1; |
905 | } else if (s[0] == '!') { |
906 | s++; |
907 | negate = 1; |
908 | } |
909 | |
910 | if (strcmp(s, "loop") == 0) |
911 | /* loop is really short-hand for opts=loop */ |
912 | goto loop_special_case; |
913 | if (is_prefixed_with(s, "opts=")) { |
914 | s += 5; |
915 | loop_special_case: |
916 | G.fs_type_flag[num] = negate ? FS_TYPE_FLAG_NEGOPT : FS_TYPE_FLAG_OPT; |
917 | } else { |
918 | if (G.fs_type_negated == -1) |
919 | G.fs_type_negated = negate; |
920 | if (G.fs_type_negated != negate) |
921 | bb_error_msg_and_die( |
922 | "either all or none of the filesystem types passed to -t must be prefixed " |
923 | "with 'no' or '!'"); |
924 | } |
925 | comma = strchrnul(s, ','); |
926 | G.fs_type_list[num++] = xstrndup(s, comma-s); |
927 | if (*comma == '\0') |
928 | break; |
929 | s = comma + 1; |
930 | } |
931 | } |
932 | |
933 | static char **new_args(void) |
934 | { |
935 | G.args = xrealloc_vector(G.args, 2, G.num_args); |
936 | return &G.args[G.num_args++]; |
937 | } |
938 | |
939 | int fsck_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
940 | int fsck_main(int argc UNUSED_PARAM, char **argv) |
941 | { |
942 | int i, status; |
943 | /*int interactive;*/ |
944 | struct fs_info *fs; |
945 | const char *fstab; |
946 | char *tmp; |
947 | char **devices; |
948 | int num_devices; |
949 | smallint opts_for_fsck; |
950 | smallint doall; |
951 | smallint notitle; |
952 | |
953 | INIT_G(); |
954 | |
955 | /* we want wait() to be interruptible */ |
956 | signal_no_SA_RESTART_empty_mask(SIGINT, record_signo); |
957 | signal_no_SA_RESTART_empty_mask(SIGTERM, record_signo); |
958 | |
959 | setbuf(stdout, NULL); |
960 | |
961 | opts_for_fsck = doall = notitle = 0; |
962 | devices = NULL; |
963 | num_devices = 0; |
964 | new_args(); /* G.args[0] = NULL, will be replaced by fsck.<type> */ |
965 | /* G.instance_list = NULL; - in bss, so already zeroed */ |
966 | |
967 | while (*++argv) { |
968 | int j; |
969 | int optpos; |
970 | char *options; |
971 | char *arg = *argv; |
972 | |
973 | /* "/dev/blk" or "/path" or "UUID=xxx" or "LABEL=xxx" */ |
974 | if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) { |
975 | // FIXME: must check that arg is a blkdev, or resolve |
976 | // "/path", "UUID=xxx" or "LABEL=xxx" into block device name |
977 | // ("UUID=xxx"/"LABEL=xxx" can probably shifted to fsck.auto duties) |
978 | devices = xrealloc_vector(devices, 2, num_devices); |
979 | devices[num_devices++] = arg; |
980 | continue; |
981 | } |
982 | |
983 | if (arg[0] != '-' || opts_for_fsck) { |
984 | *new_args() = arg; |
985 | continue; |
986 | } |
987 | |
988 | if (LONE_CHAR(arg + 1, '-')) { /* "--" ? */ |
989 | opts_for_fsck = 1; |
990 | continue; |
991 | } |
992 | |
993 | optpos = 0; |
994 | options = NULL; |
995 | for (j = 1; arg[j]; j++) { |
996 | switch (arg[j]) { |
997 | case 'A': |
998 | doall = 1; |
999 | break; |
1000 | #if DO_PROGRESS_INDICATOR |
1001 | case 'C': |
1002 | progress = 1; |
1003 | if (arg[++j]) { /* -Cn */ |
1004 | progress_fd = xatoi_positive(&arg[j]); |
1005 | goto next_arg; |
1006 | } |
1007 | /* -C n */ |
1008 | if (!*++argv) |
1009 | bb_show_usage(); |
1010 | progress_fd = xatoi_positive(*argv); |
1011 | goto next_arg; |
1012 | #endif |
1013 | case 'V': |
1014 | G.verbose++; |
1015 | break; |
1016 | case 'N': |
1017 | G.noexecute = 1; |
1018 | break; |
1019 | case 'R': |
1020 | G.skip_root = 1; |
1021 | break; |
1022 | case 'T': |
1023 | notitle = 1; |
1024 | break; |
1025 | /* case 'M': |
1026 | like_mount = 1; |
1027 | break; */ |
1028 | case 'P': |
1029 | G.parallel_root = 1; |
1030 | break; |
1031 | case 's': |
1032 | G.serialize = 1; |
1033 | break; |
1034 | case 't': |
1035 | if (G.fstype) |
1036 | bb_show_usage(); |
1037 | if (arg[++j]) |
1038 | tmp = &arg[j]; |
1039 | else if (*++argv) |
1040 | tmp = *argv; |
1041 | else |
1042 | bb_show_usage(); |
1043 | G.fstype = xstrdup(tmp); |
1044 | compile_fs_type(G.fstype); |
1045 | goto next_arg; |
1046 | case '?': |
1047 | bb_show_usage(); |
1048 | break; |
1049 | default: |
1050 | optpos++; |
1051 | /* one extra for '\0' */ |
1052 | options = xrealloc(options, optpos + 2); |
1053 | options[optpos] = arg[j]; |
1054 | break; |
1055 | } |
1056 | } |
1057 | next_arg: |
1058 | if (optpos) { |
1059 | options[0] = '-'; |
1060 | options[optpos + 1] = '\0'; |
1061 | *new_args() = options; |
1062 | } |
1063 | } |
1064 | if (getenv("FSCK_FORCE_ALL_PARALLEL")) |
1065 | G.force_all_parallel = 1; |
1066 | tmp = getenv("FSCK_MAX_INST"); |
1067 | G.max_running = INT_MAX; |
1068 | if (tmp) |
1069 | G.max_running = xatoi(tmp); |
1070 | new_args(); /* G.args[G.num_args - 2] will be replaced by <device> */ |
1071 | new_args(); /* G.args[G.num_args - 1] is the last, NULL element */ |
1072 | |
1073 | if (!notitle) |
1074 | puts("fsck (busybox "BB_VER", "BB_BT")"); |
1075 | |
1076 | /* Even plain "fsck /dev/hda1" needs fstab to get fs type, |
1077 | * so we are scanning it anyway */ |
1078 | fstab = getenv("FSTAB_FILE"); |
1079 | if (!fstab) |
1080 | fstab = "/etc/fstab"; |
1081 | load_fs_info(fstab); |
1082 | |
1083 | /*interactive = (num_devices == 1) | G.serialize;*/ |
1084 | |
1085 | if (num_devices == 0) |
1086 | /*interactive =*/ G.serialize = doall = 1; |
1087 | if (doall) |
1088 | return check_all(); |
1089 | |
1090 | status = 0; |
1091 | for (i = 0; i < num_devices; i++) { |
1092 | if (bb_got_signal) { |
1093 | kill_all_if_got_signal(); |
1094 | break; |
1095 | } |
1096 | |
1097 | fs = lookup(devices[i]); |
1098 | if (!fs) |
1099 | fs = create_fs_device(devices[i], "", "auto", NULL, -1); |
1100 | fsck_device(fs /*, interactive */); |
1101 | |
1102 | if (G.serialize |
1103 | || (G.num_running >= G.max_running) |
1104 | ) { |
1105 | int exit_status = wait_one(0); |
1106 | if (exit_status >= 0) |
1107 | status |= exit_status; |
1108 | if (G.verbose > 1) |
1109 | puts("----------------------------------"); |
1110 | } |
1111 | } |
1112 | status |= wait_many(FLAG_WAIT_ALL); |
1113 | return status; |
1114 | } |
1115 |