blob: d32f396e92a54af566d4790529f6de2ae808951c
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 | |
37 | //usage:#define fsck_trivial_usage |
38 | //usage: "[-ANPRTV] [-C FD] [-t FSTYPE] [FS_OPTS] [BLOCKDEV]..." |
39 | //usage:#define fsck_full_usage "\n\n" |
40 | //usage: "Check and repair filesystems\n" |
41 | //usage: "\n -A Walk /etc/fstab and check all filesystems" |
42 | //usage: "\n -N Don't execute, just show what would be done" |
43 | //usage: "\n -P With -A, check filesystems in parallel" |
44 | //usage: "\n -R With -A, skip the root filesystem" |
45 | //usage: "\n -T Don't show title on startup" |
46 | //usage: "\n -V Verbose" |
47 | //usage: "\n -C n Write status information to specified filedescriptor" |
48 | //usage: "\n -t TYPE List of filesystem types to check" |
49 | |
50 | #include "libbb.h" |
51 | |
52 | /* "progress indicator" code is somewhat buggy and ext[23] specific. |
53 | * We should be filesystem agnostic. IOW: there should be a well-defined |
54 | * API for fsck.something, NOT ad-hoc hacks in generic fsck. */ |
55 | #define DO_PROGRESS_INDICATOR 0 |
56 | |
57 | /* fsck 1.41.4 (27-Jan-2009) manpage says: |
58 | * 0 - No errors |
59 | * 1 - File system errors corrected |
60 | * 2 - System should be rebooted |
61 | * 4 - File system errors left uncorrected |
62 | * 8 - Operational error |
63 | * 16 - Usage or syntax error |
64 | * 32 - Fsck canceled by user request |
65 | * 128 - Shared library error |
66 | */ |
67 | #define EXIT_OK 0 |
68 | #define EXIT_NONDESTRUCT 1 |
69 | #define EXIT_DESTRUCT 2 |
70 | #define EXIT_UNCORRECTED 4 |
71 | #define EXIT_ERROR 8 |
72 | #define EXIT_USAGE 16 |
73 | #define FSCK_CANCELED 32 /* Aborted with a signal or ^C */ |
74 | |
75 | /* |
76 | * Internal structure for mount table entries. |
77 | */ |
78 | struct fs_info { |
79 | struct fs_info *next; |
80 | char *device; |
81 | char *mountpt; |
82 | char *type; |
83 | char *opts; |
84 | int passno; |
85 | int flags; |
86 | }; |
87 | |
88 | #define FLAG_DONE 1 |
89 | #define FLAG_PROGRESS 2 |
90 | /* |
91 | * Structure to allow exit codes to be stored |
92 | */ |
93 | struct fsck_instance { |
94 | struct fsck_instance *next; |
95 | int pid; |
96 | int flags; |
97 | #if DO_PROGRESS_INDICATOR |
98 | time_t start_time; |
99 | #endif |
100 | char *prog; |
101 | char *device; |
102 | char *base_device; /* /dev/hda for /dev/hdaN etc */ |
103 | }; |
104 | |
105 | static const char ignored_types[] ALIGN1 = |
106 | "ignore\0" |
107 | "iso9660\0" |
108 | "nfs\0" |
109 | "proc\0" |
110 | "sw\0" |
111 | "swap\0" |
112 | "tmpfs\0" |
113 | "devpts\0"; |
114 | |
115 | #if 0 |
116 | static const char really_wanted[] ALIGN1 = |
117 | "minix\0" |
118 | "ext2\0" |
119 | "ext3\0" |
120 | "jfs\0" |
121 | "reiserfs\0" |
122 | "xiafs\0" |
123 | "xfs\0"; |
124 | #endif |
125 | |
126 | #define BASE_MD "/dev/md" |
127 | |
128 | static char **args; |
129 | static int num_args; |
130 | static int verbose; |
131 | |
132 | #define FS_TYPE_FLAG_NORMAL 0 |
133 | #define FS_TYPE_FLAG_OPT 1 |
134 | #define FS_TYPE_FLAG_NEGOPT 2 |
135 | static char **fs_type_list; |
136 | static uint8_t *fs_type_flag; |
137 | static smallint fs_type_negated; |
138 | |
139 | static smallint noexecute; |
140 | static smallint serialize; |
141 | static smallint skip_root; |
142 | /* static smallint like_mount; */ |
143 | static smallint parallel_root; |
144 | static smallint force_all_parallel; |
145 | |
146 | #if DO_PROGRESS_INDICATOR |
147 | static smallint progress; |
148 | static int progress_fd; |
149 | #endif |
150 | |
151 | static int num_running; |
152 | static int max_running; |
153 | static char *fstype; |
154 | static struct fs_info *filesys_info; |
155 | static struct fs_info *filesys_last; |
156 | static struct fsck_instance *instance_list; |
157 | |
158 | /* |
159 | * Return the "base device" given a particular device; this is used to |
160 | * assure that we only fsck one partition on a particular drive at any |
161 | * one time. Otherwise, the disk heads will be seeking all over the |
162 | * place. If the base device cannot be determined, return NULL. |
163 | * |
164 | * The base_device() function returns an allocated string which must |
165 | * be freed. |
166 | */ |
167 | #if ENABLE_FEATURE_DEVFS |
168 | /* |
169 | * Required for the uber-silly devfs /dev/ide/host1/bus2/target3/lun3 |
170 | * pathames. |
171 | */ |
172 | static const char *const devfs_hier[] = { |
173 | "host", "bus", "target", "lun", NULL |
174 | }; |
175 | #endif |
176 | |
177 | static char *base_device(const char *device) |
178 | { |
179 | char *str, *cp; |
180 | #if ENABLE_FEATURE_DEVFS |
181 | const char *const *hier; |
182 | const char *disk; |
183 | int len; |
184 | #endif |
185 | str = xstrdup(device); |
186 | |
187 | /* Skip over "/dev/"; if it's not present, give up */ |
188 | cp = skip_dev_pfx(str); |
189 | if (cp == str) |
190 | goto errout; |
191 | |
192 | /* |
193 | * For md devices, we treat them all as if they were all |
194 | * on one disk, since we don't know how to parallelize them. |
195 | */ |
196 | if (cp[0] == 'm' && cp[1] == 'd') { |
197 | cp[2] = 0; |
198 | return str; |
199 | } |
200 | |
201 | /* Handle DAC 960 devices */ |
202 | if (strncmp(cp, "rd/", 3) == 0) { |
203 | cp += 3; |
204 | if (cp[0] != 'c' || !isdigit(cp[1]) |
205 | || cp[2] != 'd' || !isdigit(cp[3])) |
206 | goto errout; |
207 | cp[4] = 0; |
208 | return str; |
209 | } |
210 | |
211 | /* Now let's handle /dev/hd* and /dev/sd* devices.... */ |
212 | if ((cp[0] == 'h' || cp[0] == 's') && cp[1] == 'd') { |
213 | cp += 2; |
214 | /* If there's a single number after /dev/hd, skip it */ |
215 | if (isdigit(*cp)) |
216 | cp++; |
217 | /* What follows must be an alpha char, or give up */ |
218 | if (!isalpha(*cp)) |
219 | goto errout; |
220 | cp[1] = 0; |
221 | return str; |
222 | } |
223 | |
224 | #if ENABLE_FEATURE_DEVFS |
225 | /* Now let's handle devfs (ugh) names */ |
226 | len = 0; |
227 | if (strncmp(cp, "ide/", 4) == 0) |
228 | len = 4; |
229 | if (strncmp(cp, "scsi/", 5) == 0) |
230 | len = 5; |
231 | if (len) { |
232 | cp += len; |
233 | /* |
234 | * Now we proceed down the expected devfs hierarchy. |
235 | * i.e., .../host1/bus2/target3/lun4/... |
236 | * If we don't find the expected token, followed by |
237 | * some number of digits at each level, abort. |
238 | */ |
239 | for (hier = devfs_hier; *hier; hier++) { |
240 | len = strlen(*hier); |
241 | if (strncmp(cp, *hier, len) != 0) |
242 | goto errout; |
243 | cp += len; |
244 | while (*cp != '/' && *cp != 0) { |
245 | if (!isdigit(*cp)) |
246 | goto errout; |
247 | cp++; |
248 | } |
249 | cp++; |
250 | } |
251 | cp[-1] = 0; |
252 | return str; |
253 | } |
254 | |
255 | /* Now handle devfs /dev/disc or /dev/disk names */ |
256 | disk = 0; |
257 | if (strncmp(cp, "discs/", 6) == 0) |
258 | disk = "disc"; |
259 | else if (strncmp(cp, "disks/", 6) == 0) |
260 | disk = "disk"; |
261 | if (disk) { |
262 | cp += 6; |
263 | if (strncmp(cp, disk, 4) != 0) |
264 | goto errout; |
265 | cp += 4; |
266 | while (*cp != '/' && *cp != 0) { |
267 | if (!isdigit(*cp)) |
268 | goto errout; |
269 | cp++; |
270 | } |
271 | *cp = 0; |
272 | return str; |
273 | } |
274 | #endif |
275 | errout: |
276 | free(str); |
277 | return NULL; |
278 | } |
279 | |
280 | static void free_instance(struct fsck_instance *p) |
281 | { |
282 | free(p->prog); |
283 | free(p->device); |
284 | free(p->base_device); |
285 | free(p); |
286 | } |
287 | |
288 | static struct fs_info *create_fs_device(const char *device, const char *mntpnt, |
289 | const char *type, const char *opts, |
290 | int passno) |
291 | { |
292 | struct fs_info *fs; |
293 | |
294 | fs = xzalloc(sizeof(*fs)); |
295 | fs->device = xstrdup(device); |
296 | fs->mountpt = xstrdup(mntpnt); |
297 | if (strchr(type, ',')) |
298 | type = (char *)"auto"; |
299 | fs->type = xstrdup(type); |
300 | fs->opts = xstrdup(opts ? opts : ""); |
301 | fs->passno = passno < 0 ? 1 : passno; |
302 | /*fs->flags = 0; */ |
303 | /*fs->next = NULL; */ |
304 | |
305 | if (!filesys_info) |
306 | filesys_info = fs; |
307 | else |
308 | filesys_last->next = fs; |
309 | filesys_last = fs; |
310 | |
311 | return fs; |
312 | } |
313 | |
314 | /* Load the filesystem database from /etc/fstab */ |
315 | static void load_fs_info(const char *filename) |
316 | { |
317 | FILE *fstab; |
318 | struct mntent mte; |
319 | |
320 | fstab = setmntent(filename, "r"); |
321 | if (!fstab) { |
322 | bb_perror_msg("can't read '%s'", filename); |
323 | return; |
324 | } |
325 | |
326 | // Loop through entries |
327 | while (getmntent_r(fstab, &mte, bb_common_bufsiz1, COMMON_BUFSIZE)) { |
328 | //bb_info_msg("CREATE[%s][%s][%s][%s][%d]", mte.mnt_fsname, mte.mnt_dir, |
329 | // mte.mnt_type, mte.mnt_opts, |
330 | // mte.mnt_passno); |
331 | create_fs_device(mte.mnt_fsname, mte.mnt_dir, |
332 | mte.mnt_type, mte.mnt_opts, |
333 | mte.mnt_passno); |
334 | } |
335 | endmntent(fstab); |
336 | } |
337 | |
338 | /* Lookup filesys in /etc/fstab and return the corresponding entry. */ |
339 | static struct fs_info *lookup(char *filesys) |
340 | { |
341 | struct fs_info *fs; |
342 | |
343 | for (fs = filesys_info; fs; fs = fs->next) { |
344 | if (strcmp(filesys, fs->device) == 0 |
345 | || (fs->mountpt && strcmp(filesys, fs->mountpt) == 0) |
346 | ) |
347 | break; |
348 | } |
349 | |
350 | return fs; |
351 | } |
352 | |
353 | #if DO_PROGRESS_INDICATOR |
354 | static int progress_active(void) |
355 | { |
356 | struct fsck_instance *inst; |
357 | |
358 | for (inst = instance_list; inst; inst = inst->next) { |
359 | if (inst->flags & FLAG_DONE) |
360 | continue; |
361 | if (inst->flags & FLAG_PROGRESS) |
362 | return 1; |
363 | } |
364 | return 0; |
365 | } |
366 | #endif |
367 | |
368 | |
369 | /* |
370 | * Send a signal to all outstanding fsck child processes |
371 | */ |
372 | static void kill_all_if_got_signal(void) |
373 | { |
374 | static smallint kill_sent; |
375 | |
376 | struct fsck_instance *inst; |
377 | |
378 | if (!bb_got_signal || kill_sent) |
379 | return; |
380 | |
381 | for (inst = instance_list; inst; inst = inst->next) { |
382 | if (inst->flags & FLAG_DONE) |
383 | continue; |
384 | kill(inst->pid, SIGTERM); |
385 | } |
386 | kill_sent = 1; |
387 | } |
388 | |
389 | /* |
390 | * Wait for one child process to exit; when it does, unlink it from |
391 | * the list of executing child processes, free, and return its exit status. |
392 | * If there is no exited child, return -1. |
393 | */ |
394 | static int wait_one(int flags) |
395 | { |
396 | int status; |
397 | int sig; |
398 | struct fsck_instance *inst, *prev; |
399 | pid_t pid; |
400 | |
401 | if (!instance_list) |
402 | return -1; |
403 | /* if (noexecute) { already returned -1; } */ |
404 | |
405 | while (1) { |
406 | pid = waitpid(-1, &status, flags); |
407 | kill_all_if_got_signal(); |
408 | if (pid == 0) /* flags == WNOHANG and no children exited */ |
409 | return -1; |
410 | if (pid < 0) { |
411 | if (errno == EINTR) |
412 | continue; |
413 | if (errno == ECHILD) { /* paranoia */ |
414 | bb_error_msg("wait: no more children"); |
415 | return -1; |
416 | } |
417 | bb_perror_msg("wait"); |
418 | continue; |
419 | } |
420 | prev = NULL; |
421 | inst = instance_list; |
422 | do { |
423 | if (inst->pid == pid) |
424 | goto child_died; |
425 | prev = inst; |
426 | inst = inst->next; |
427 | } while (inst); |
428 | } |
429 | child_died: |
430 | |
431 | if (WIFEXITED(status)) |
432 | status = WEXITSTATUS(status); |
433 | else if (WIFSIGNALED(status)) { |
434 | sig = WTERMSIG(status); |
435 | status = EXIT_UNCORRECTED; |
436 | if (sig != SIGINT) { |
437 | printf("Warning: %s %s terminated " |
438 | "by signal %d\n", |
439 | inst->prog, inst->device, sig); |
440 | status = EXIT_ERROR; |
441 | } |
442 | } else { |
443 | printf("%s %s: status is %x, should never happen\n", |
444 | inst->prog, inst->device, status); |
445 | status = EXIT_ERROR; |
446 | } |
447 | |
448 | #if DO_PROGRESS_INDICATOR |
449 | if (progress && (inst->flags & FLAG_PROGRESS) && !progress_active()) { |
450 | struct fsck_instance *inst2; |
451 | for (inst2 = instance_list; inst2; inst2 = inst2->next) { |
452 | if (inst2->flags & FLAG_DONE) |
453 | continue; |
454 | if (strcmp(inst2->type, "ext2") != 0 |
455 | && strcmp(inst2->type, "ext3") != 0 |
456 | ) { |
457 | continue; |
458 | } |
459 | /* ext[23], we will send USR1 |
460 | * (request to start displaying progress bar) |
461 | * |
462 | * If we've just started the fsck, wait a tiny |
463 | * bit before sending the kill, to give it |
464 | * time to set up the signal handler |
465 | */ |
466 | if (inst2->start_time >= time(NULL) - 1) |
467 | sleep(1); |
468 | kill(inst2->pid, SIGUSR1); |
469 | inst2->flags |= FLAG_PROGRESS; |
470 | break; |
471 | } |
472 | } |
473 | #endif |
474 | |
475 | if (prev) |
476 | prev->next = inst->next; |
477 | else |
478 | instance_list = inst->next; |
479 | if (verbose > 1) |
480 | printf("Finished with %s (exit status %d)\n", |
481 | inst->device, status); |
482 | num_running--; |
483 | free_instance(inst); |
484 | |
485 | return status; |
486 | } |
487 | |
488 | /* |
489 | * Wait until all executing child processes have exited; return the |
490 | * logical OR of all of their exit code values. |
491 | */ |
492 | #define FLAG_WAIT_ALL 0 |
493 | #define FLAG_WAIT_ATLEAST_ONE WNOHANG |
494 | static int wait_many(int flags) |
495 | { |
496 | int exit_status; |
497 | int global_status = 0; |
498 | int wait_flags = 0; |
499 | |
500 | while ((exit_status = wait_one(wait_flags)) != -1) { |
501 | global_status |= exit_status; |
502 | wait_flags |= flags; |
503 | } |
504 | return global_status; |
505 | } |
506 | |
507 | /* |
508 | * Execute a particular fsck program, and link it into the list of |
509 | * child processes we are waiting for. |
510 | */ |
511 | static void execute(const char *type, const char *device, |
512 | const char *mntpt /*, int interactive */) |
513 | { |
514 | int i; |
515 | struct fsck_instance *inst; |
516 | pid_t pid; |
517 | |
518 | args[0] = xasprintf("fsck.%s", type); |
519 | |
520 | #if DO_PROGRESS_INDICATOR |
521 | if (progress && !progress_active()) { |
522 | if (strcmp(type, "ext2") == 0 |
523 | || strcmp(type, "ext3") == 0 |
524 | ) { |
525 | args[XXX] = xasprintf("-C%d", progress_fd); /* 1 */ |
526 | inst->flags |= FLAG_PROGRESS; |
527 | } |
528 | } |
529 | #endif |
530 | |
531 | args[num_args - 2] = (char*)device; |
532 | /* args[num_args - 1] = NULL; - already is */ |
533 | |
534 | if (verbose || noexecute) { |
535 | printf("[%s (%d) -- %s]", args[0], num_running, |
536 | mntpt ? mntpt : device); |
537 | for (i = 0; args[i]; i++) |
538 | printf(" %s", args[i]); |
539 | bb_putchar('\n'); |
540 | } |
541 | |
542 | /* Fork and execute the correct program. */ |
543 | pid = -1; |
544 | if (!noexecute) { |
545 | pid = spawn(args); |
546 | if (pid < 0) |
547 | bb_simple_perror_msg(args[0]); |
548 | } |
549 | |
550 | #if DO_PROGRESS_INDICATOR |
551 | free(args[XXX]); |
552 | #endif |
553 | |
554 | /* No child, so don't record an instance */ |
555 | if (pid <= 0) { |
556 | free(args[0]); |
557 | return; |
558 | } |
559 | |
560 | inst = xzalloc(sizeof(*inst)); |
561 | inst->pid = pid; |
562 | inst->prog = args[0]; |
563 | inst->device = xstrdup(device); |
564 | inst->base_device = base_device(device); |
565 | #if DO_PROGRESS_INDICATOR |
566 | inst->start_time = time(NULL); |
567 | #endif |
568 | |
569 | /* Add to the list of running fsck's. |
570 | * (was adding to the end, but adding to the front is simpler...) */ |
571 | inst->next = instance_list; |
572 | instance_list = inst; |
573 | } |
574 | |
575 | /* |
576 | * Run the fsck program on a particular device |
577 | * |
578 | * If the type is specified using -t, and it isn't prefixed with "no" |
579 | * (as in "noext2") and only one filesystem type is specified, then |
580 | * use that type regardless of what is specified in /etc/fstab. |
581 | * |
582 | * If the type isn't specified by the user, then use either the type |
583 | * specified in /etc/fstab, or "auto". |
584 | */ |
585 | static void fsck_device(struct fs_info *fs /*, int interactive */) |
586 | { |
587 | const char *type; |
588 | |
589 | if (strcmp(fs->type, "auto") != 0) { |
590 | type = fs->type; |
591 | if (verbose > 2) |
592 | bb_info_msg("using filesystem type '%s' %s", |
593 | type, "from fstab"); |
594 | } else if (fstype |
595 | && (fstype[0] != 'n' || fstype[1] != 'o') /* != "no" */ |
596 | && strncmp(fstype, "opts=", 5) != 0 |
597 | && strncmp(fstype, "loop", 4) != 0 |
598 | && !strchr(fstype, ',') |
599 | ) { |
600 | type = fstype; |
601 | if (verbose > 2) |
602 | bb_info_msg("using filesystem type '%s' %s", |
603 | type, "from -t"); |
604 | } else { |
605 | type = "auto"; |
606 | if (verbose > 2) |
607 | bb_info_msg("using filesystem type '%s' %s", |
608 | type, "(default)"); |
609 | } |
610 | |
611 | num_running++; |
612 | execute(type, fs->device, fs->mountpt /*, interactive */); |
613 | } |
614 | |
615 | /* |
616 | * Returns TRUE if a partition on the same disk is already being |
617 | * checked. |
618 | */ |
619 | static int device_already_active(char *device) |
620 | { |
621 | struct fsck_instance *inst; |
622 | char *base; |
623 | |
624 | if (force_all_parallel) |
625 | return 0; |
626 | |
627 | #ifdef BASE_MD |
628 | /* Don't check a soft raid disk with any other disk */ |
629 | if (instance_list |
630 | && (!strncmp(instance_list->device, BASE_MD, sizeof(BASE_MD)-1) |
631 | || !strncmp(device, BASE_MD, sizeof(BASE_MD)-1)) |
632 | ) { |
633 | return 1; |
634 | } |
635 | #endif |
636 | |
637 | base = base_device(device); |
638 | /* |
639 | * If we don't know the base device, assume that the device is |
640 | * already active if there are any fsck instances running. |
641 | */ |
642 | if (!base) |
643 | return (instance_list != NULL); |
644 | |
645 | for (inst = instance_list; inst; inst = inst->next) { |
646 | if (!inst->base_device || !strcmp(base, inst->base_device)) { |
647 | free(base); |
648 | return 1; |
649 | } |
650 | } |
651 | |
652 | free(base); |
653 | return 0; |
654 | } |
655 | |
656 | /* |
657 | * This function returns true if a particular option appears in a |
658 | * comma-delimited options list |
659 | */ |
660 | static int opt_in_list(char *opt, char *optlist) |
661 | { |
662 | char *s; |
663 | int len; |
664 | |
665 | if (!optlist) |
666 | return 0; |
667 | |
668 | len = strlen(opt); |
669 | s = optlist - 1; |
670 | while (1) { |
671 | s = strstr(s + 1, opt); |
672 | if (!s) |
673 | return 0; |
674 | /* neither "opt.." nor "xxx,opt.."? */ |
675 | if (s != optlist && s[-1] != ',') |
676 | continue; |
677 | /* neither "..opt" nor "..opt,xxx"? */ |
678 | if (s[len] != '\0' && s[len] != ',') |
679 | continue; |
680 | return 1; |
681 | } |
682 | } |
683 | |
684 | /* See if the filesystem matches the criteria given by the -t option */ |
685 | static int fs_match(struct fs_info *fs) |
686 | { |
687 | int n, ret, checked_type; |
688 | char *cp; |
689 | |
690 | if (!fs_type_list) |
691 | return 1; |
692 | |
693 | ret = 0; |
694 | checked_type = 0; |
695 | n = 0; |
696 | while (1) { |
697 | cp = fs_type_list[n]; |
698 | if (!cp) |
699 | break; |
700 | switch (fs_type_flag[n]) { |
701 | case FS_TYPE_FLAG_NORMAL: |
702 | checked_type++; |
703 | if (strcmp(cp, fs->type) == 0) |
704 | ret = 1; |
705 | break; |
706 | case FS_TYPE_FLAG_NEGOPT: |
707 | if (opt_in_list(cp, fs->opts)) |
708 | return 0; |
709 | break; |
710 | case FS_TYPE_FLAG_OPT: |
711 | if (!opt_in_list(cp, fs->opts)) |
712 | return 0; |
713 | break; |
714 | } |
715 | n++; |
716 | } |
717 | if (checked_type == 0) |
718 | return 1; |
719 | |
720 | return (fs_type_negated ? !ret : ret); |
721 | } |
722 | |
723 | /* Check if we should ignore this filesystem. */ |
724 | static int ignore(struct fs_info *fs) |
725 | { |
726 | /* |
727 | * If the pass number is 0, ignore it. |
728 | */ |
729 | if (fs->passno == 0) |
730 | return 1; |
731 | |
732 | /* |
733 | * If a specific fstype is specified, and it doesn't match, |
734 | * ignore it. |
735 | */ |
736 | if (!fs_match(fs)) |
737 | return 1; |
738 | |
739 | /* Are we ignoring this type? */ |
740 | if (index_in_strings(ignored_types, fs->type) >= 0) |
741 | return 1; |
742 | |
743 | /* We can and want to check this file system type. */ |
744 | return 0; |
745 | } |
746 | |
747 | /* Check all file systems, using the /etc/fstab table. */ |
748 | static int check_all(void) |
749 | { |
750 | struct fs_info *fs; |
751 | int status = EXIT_OK; |
752 | smallint not_done_yet; |
753 | smallint pass_done; |
754 | int passno; |
755 | |
756 | if (verbose) |
757 | puts("Checking all filesystems"); |
758 | |
759 | /* |
760 | * Do an initial scan over the filesystem; mark filesystems |
761 | * which should be ignored as done, and resolve any "auto" |
762 | * filesystem types (done as a side-effect of calling ignore()). |
763 | */ |
764 | for (fs = filesys_info; fs; fs = fs->next) |
765 | if (ignore(fs)) |
766 | fs->flags |= FLAG_DONE; |
767 | |
768 | /* |
769 | * Find and check the root filesystem. |
770 | */ |
771 | if (!parallel_root) { |
772 | for (fs = filesys_info; fs; fs = fs->next) { |
773 | if (LONE_CHAR(fs->mountpt, '/')) { |
774 | if (!skip_root && !ignore(fs)) { |
775 | fsck_device(fs /*, 1*/); |
776 | status |= wait_many(FLAG_WAIT_ALL); |
777 | if (status > EXIT_NONDESTRUCT) |
778 | return status; |
779 | } |
780 | fs->flags |= FLAG_DONE; |
781 | break; |
782 | } |
783 | } |
784 | } |
785 | /* |
786 | * This is for the bone-headed user who has root |
787 | * filesystem listed twice. |
788 | * "Skip root" will skip _all_ root entries. |
789 | */ |
790 | if (skip_root) |
791 | for (fs = filesys_info; fs; fs = fs->next) |
792 | if (LONE_CHAR(fs->mountpt, '/')) |
793 | fs->flags |= FLAG_DONE; |
794 | |
795 | not_done_yet = 1; |
796 | passno = 1; |
797 | while (not_done_yet) { |
798 | not_done_yet = 0; |
799 | pass_done = 1; |
800 | |
801 | for (fs = filesys_info; fs; fs = fs->next) { |
802 | if (bb_got_signal) |
803 | break; |
804 | if (fs->flags & FLAG_DONE) |
805 | continue; |
806 | /* |
807 | * If the filesystem's pass number is higher |
808 | * than the current pass number, then we didn't |
809 | * do it yet. |
810 | */ |
811 | if (fs->passno > passno) { |
812 | not_done_yet = 1; |
813 | continue; |
814 | } |
815 | /* |
816 | * If a filesystem on a particular device has |
817 | * already been spawned, then we need to defer |
818 | * this to another pass. |
819 | */ |
820 | if (device_already_active(fs->device)) { |
821 | pass_done = 0; |
822 | continue; |
823 | } |
824 | /* |
825 | * Spawn off the fsck process |
826 | */ |
827 | fsck_device(fs /*, serialize*/); |
828 | fs->flags |= FLAG_DONE; |
829 | |
830 | /* |
831 | * Only do one filesystem at a time, or if we |
832 | * have a limit on the number of fsck's extant |
833 | * at one time, apply that limit. |
834 | */ |
835 | if (serialize |
836 | || (max_running && (num_running >= max_running)) |
837 | ) { |
838 | pass_done = 0; |
839 | break; |
840 | } |
841 | } |
842 | if (bb_got_signal) |
843 | break; |
844 | if (verbose > 1) |
845 | printf("--waiting-- (pass %d)\n", passno); |
846 | status |= wait_many(pass_done ? FLAG_WAIT_ALL : |
847 | FLAG_WAIT_ATLEAST_ONE); |
848 | if (pass_done) { |
849 | if (verbose > 1) |
850 | puts("----------------------------------"); |
851 | passno++; |
852 | } else |
853 | not_done_yet = 1; |
854 | } |
855 | kill_all_if_got_signal(); |
856 | status |= wait_many(FLAG_WAIT_ATLEAST_ONE); |
857 | return status; |
858 | } |
859 | |
860 | /* |
861 | * Deal with the fsck -t argument. |
862 | * Huh, for mount "-t novfat,nfs" means "neither vfat nor nfs"! |
863 | * Why here we require "-t novfat,nonfs" ?? |
864 | */ |
865 | static void compile_fs_type(char *fs_type) |
866 | { |
867 | char *s; |
868 | int num = 2; |
869 | smallint negate; |
870 | |
871 | s = fs_type; |
872 | while ((s = strchr(s, ','))) { |
873 | num++; |
874 | s++; |
875 | } |
876 | |
877 | fs_type_list = xzalloc(num * sizeof(fs_type_list[0])); |
878 | fs_type_flag = xzalloc(num * sizeof(fs_type_flag[0])); |
879 | fs_type_negated = -1; /* not yet known is it negated or not */ |
880 | |
881 | num = 0; |
882 | s = fs_type; |
883 | while (1) { |
884 | char *comma; |
885 | |
886 | negate = 0; |
887 | if (s[0] == 'n' && s[1] == 'o') { /* "no.." */ |
888 | s += 2; |
889 | negate = 1; |
890 | } else if (s[0] == '!') { |
891 | s++; |
892 | negate = 1; |
893 | } |
894 | |
895 | if (strcmp(s, "loop") == 0) |
896 | /* loop is really short-hand for opts=loop */ |
897 | goto loop_special_case; |
898 | if (strncmp(s, "opts=", 5) == 0) { |
899 | s += 5; |
900 | loop_special_case: |
901 | fs_type_flag[num] = negate ? FS_TYPE_FLAG_NEGOPT : FS_TYPE_FLAG_OPT; |
902 | } else { |
903 | if (fs_type_negated == -1) |
904 | fs_type_negated = negate; |
905 | if (fs_type_negated != negate) |
906 | bb_error_msg_and_die( |
907 | "either all or none of the filesystem types passed to -t must be prefixed " |
908 | "with 'no' or '!'"); |
909 | } |
910 | comma = strchr(s, ','); |
911 | fs_type_list[num++] = comma ? xstrndup(s, comma-s) : xstrdup(s); |
912 | if (!comma) |
913 | break; |
914 | s = comma + 1; |
915 | } |
916 | } |
917 | |
918 | static char **new_args(void) |
919 | { |
920 | args = xrealloc_vector(args, 2, num_args); |
921 | return &args[num_args++]; |
922 | } |
923 | |
924 | int fsck_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
925 | int fsck_main(int argc UNUSED_PARAM, char **argv) |
926 | { |
927 | int i, status; |
928 | /*int interactive;*/ |
929 | struct fs_info *fs; |
930 | const char *fstab; |
931 | char *tmp; |
932 | char **devices; |
933 | int num_devices; |
934 | smallint opts_for_fsck; |
935 | smallint doall; |
936 | smallint notitle; |
937 | |
938 | /* we want wait() to be interruptible */ |
939 | signal_no_SA_RESTART_empty_mask(SIGINT, record_signo); |
940 | signal_no_SA_RESTART_empty_mask(SIGTERM, record_signo); |
941 | |
942 | setbuf(stdout, NULL); |
943 | |
944 | opts_for_fsck = doall = notitle = 0; |
945 | devices = NULL; |
946 | num_devices = 0; |
947 | new_args(); /* args[0] = NULL, will be replaced by fsck.<type> */ |
948 | /* instance_list = NULL; - in bss, so already zeroed */ |
949 | |
950 | while (*++argv) { |
951 | int j; |
952 | int optpos; |
953 | char *options; |
954 | char *arg = *argv; |
955 | |
956 | /* "/dev/blk" or "/path" or "UUID=xxx" or "LABEL=xxx" */ |
957 | if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) { |
958 | // FIXME: must check that arg is a blkdev, or resolve |
959 | // "/path", "UUID=xxx" or "LABEL=xxx" into block device name |
960 | // ("UUID=xxx"/"LABEL=xxx" can probably shifted to fsck.auto duties) |
961 | devices = xrealloc_vector(devices, 2, num_devices); |
962 | devices[num_devices++] = arg; |
963 | continue; |
964 | } |
965 | |
966 | if (arg[0] != '-' || opts_for_fsck) { |
967 | *new_args() = arg; |
968 | continue; |
969 | } |
970 | |
971 | if (LONE_CHAR(arg + 1, '-')) { /* "--" ? */ |
972 | opts_for_fsck = 1; |
973 | continue; |
974 | } |
975 | |
976 | optpos = 0; |
977 | options = NULL; |
978 | for (j = 1; arg[j]; j++) { |
979 | switch (arg[j]) { |
980 | case 'A': |
981 | doall = 1; |
982 | break; |
983 | #if DO_PROGRESS_INDICATOR |
984 | case 'C': |
985 | progress = 1; |
986 | if (arg[++j]) { /* -Cn */ |
987 | progress_fd = xatoi_positive(&arg[j]); |
988 | goto next_arg; |
989 | } |
990 | /* -C n */ |
991 | if (!*++argv) |
992 | bb_show_usage(); |
993 | progress_fd = xatoi_positive(*argv); |
994 | goto next_arg; |
995 | #endif |
996 | case 'V': |
997 | verbose++; |
998 | break; |
999 | case 'N': |
1000 | noexecute = 1; |
1001 | break; |
1002 | case 'R': |
1003 | skip_root = 1; |
1004 | break; |
1005 | case 'T': |
1006 | notitle = 1; |
1007 | break; |
1008 | /* case 'M': |
1009 | like_mount = 1; |
1010 | break; */ |
1011 | case 'P': |
1012 | parallel_root = 1; |
1013 | break; |
1014 | case 's': |
1015 | serialize = 1; |
1016 | break; |
1017 | case 't': |
1018 | if (fstype) |
1019 | bb_show_usage(); |
1020 | if (arg[++j]) |
1021 | tmp = &arg[j]; |
1022 | else if (*++argv) |
1023 | tmp = *argv; |
1024 | else |
1025 | bb_show_usage(); |
1026 | fstype = xstrdup(tmp); |
1027 | compile_fs_type(fstype); |
1028 | goto next_arg; |
1029 | case '?': |
1030 | bb_show_usage(); |
1031 | break; |
1032 | default: |
1033 | optpos++; |
1034 | /* one extra for '\0' */ |
1035 | options = xrealloc(options, optpos + 2); |
1036 | options[optpos] = arg[j]; |
1037 | break; |
1038 | } |
1039 | } |
1040 | next_arg: |
1041 | if (optpos) { |
1042 | options[0] = '-'; |
1043 | options[optpos + 1] = '\0'; |
1044 | *new_args() = options; |
1045 | } |
1046 | } |
1047 | if (getenv("FSCK_FORCE_ALL_PARALLEL")) |
1048 | force_all_parallel = 1; |
1049 | tmp = getenv("FSCK_MAX_INST"); |
1050 | if (tmp) |
1051 | max_running = xatoi(tmp); |
1052 | new_args(); /* args[num_args - 2] will be replaced by <device> */ |
1053 | new_args(); /* args[num_args - 1] is the last, NULL element */ |
1054 | |
1055 | if (!notitle) |
1056 | puts("fsck (busybox "BB_VER", "BB_BT")"); |
1057 | |
1058 | /* Even plain "fsck /dev/hda1" needs fstab to get fs type, |
1059 | * so we are scanning it anyway */ |
1060 | fstab = getenv("FSTAB_FILE"); |
1061 | if (!fstab) |
1062 | fstab = "/etc/fstab"; |
1063 | load_fs_info(fstab); |
1064 | |
1065 | /*interactive = (num_devices == 1) | serialize;*/ |
1066 | |
1067 | if (num_devices == 0) |
1068 | /*interactive =*/ serialize = doall = 1; |
1069 | if (doall) |
1070 | return check_all(); |
1071 | |
1072 | status = 0; |
1073 | for (i = 0; i < num_devices; i++) { |
1074 | if (bb_got_signal) { |
1075 | kill_all_if_got_signal(); |
1076 | break; |
1077 | } |
1078 | |
1079 | fs = lookup(devices[i]); |
1080 | if (!fs) |
1081 | fs = create_fs_device(devices[i], "", "auto", NULL, -1); |
1082 | fsck_device(fs /*, interactive */); |
1083 | |
1084 | if (serialize |
1085 | || (max_running && (num_running >= max_running)) |
1086 | ) { |
1087 | int exit_status = wait_one(0); |
1088 | if (exit_status >= 0) |
1089 | status |= exit_status; |
1090 | if (verbose > 1) |
1091 | puts("----------------------------------"); |
1092 | } |
1093 | } |
1094 | status |= wait_many(FLAG_WAIT_ALL); |
1095 | return status; |
1096 | } |
1097 |