Contents of /trunk/mkinitrd-magellan/busybox/e2fsprogs/fsck.c
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Fri Apr 24 18:33:46 2009 UTC (15 years, 5 months ago) by niro
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Fri Apr 24 18:33:46 2009 UTC (15 years, 5 months ago) by niro
File MIME type: text/plain
File size: 24226 byte(s)
-updated to busybox-1.13.4
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 | * %Begin-Header% |
24 | * This file may be redistributed under the terms of the GNU Public |
25 | * License. |
26 | * %End-Header% |
27 | */ |
28 | |
29 | /* All filesystem specific hooks have been removed. |
30 | * If filesystem cannot be determined, we will execute |
31 | * "fsck.auto". Currently this also happens if you specify |
32 | * UUID=xxx or LABEL=xxx as an object to check. |
33 | * Detection code for that is also probably has to be in fsck.auto. |
34 | * |
35 | * In other words, this is _really_ is just a driver program which |
36 | * spawns actual fsck.something for each filesystem to check. |
37 | * It doesn't guess filesystem types from on-disk format. |
38 | */ |
39 | |
40 | #include "libbb.h" |
41 | |
42 | /* "progress indicator" code is somewhat buggy and ext[23] specific. |
43 | * We should be filesystem agnostic. IOW: there should be a well-defined |
44 | * API for fsck.something, NOT ad-hoc hacks in generic fsck. */ |
45 | #define DO_PROGRESS_INDICATOR 0 |
46 | |
47 | #define EXIT_OK 0 |
48 | #define EXIT_NONDESTRUCT 1 |
49 | #define EXIT_DESTRUCT 2 |
50 | #define EXIT_UNCORRECTED 4 |
51 | #define EXIT_ERROR 8 |
52 | #define EXIT_USAGE 16 |
53 | #define FSCK_CANCELED 32 /* Aborted with a signal or ^C */ |
54 | |
55 | /* |
56 | * Internal structure for mount table entries. |
57 | */ |
58 | |
59 | struct fs_info { |
60 | struct fs_info *next; |
61 | char *device; |
62 | char *mountpt; |
63 | char *type; |
64 | char *opts; |
65 | int passno; |
66 | int flags; |
67 | }; |
68 | |
69 | #define FLAG_DONE 1 |
70 | #define FLAG_PROGRESS 2 |
71 | /* |
72 | * Structure to allow exit codes to be stored |
73 | */ |
74 | struct fsck_instance { |
75 | struct fsck_instance *next; |
76 | int pid; |
77 | int flags; |
78 | #if DO_PROGRESS_INDICATOR |
79 | time_t start_time; |
80 | #endif |
81 | char *prog; |
82 | char *device; |
83 | char *base_device; /* /dev/hda for /dev/hdaN etc */ |
84 | }; |
85 | |
86 | static const char ignored_types[] ALIGN1 = |
87 | "ignore\0" |
88 | "iso9660\0" |
89 | "nfs\0" |
90 | "proc\0" |
91 | "sw\0" |
92 | "swap\0" |
93 | "tmpfs\0" |
94 | "devpts\0"; |
95 | |
96 | #if 0 |
97 | static const char really_wanted[] ALIGN1 = |
98 | "minix\0" |
99 | "ext2\0" |
100 | "ext3\0" |
101 | "jfs\0" |
102 | "reiserfs\0" |
103 | "xiafs\0" |
104 | "xfs\0"; |
105 | #endif |
106 | |
107 | #define BASE_MD "/dev/md" |
108 | |
109 | static char **devices; |
110 | static char **args; |
111 | static int num_devices; |
112 | static int num_args; |
113 | static int verbose; |
114 | |
115 | #define FS_TYPE_FLAG_NORMAL 0 |
116 | #define FS_TYPE_FLAG_OPT 1 |
117 | #define FS_TYPE_FLAG_NEGOPT 2 |
118 | static char **fs_type_list; |
119 | static uint8_t *fs_type_flag; |
120 | static smallint fs_type_negated; |
121 | |
122 | static volatile smallint cancel_requested; |
123 | static smallint doall; |
124 | static smallint noexecute; |
125 | static smallint serialize; |
126 | static smallint skip_root; |
127 | /* static smallint like_mount; */ |
128 | static smallint notitle; |
129 | static smallint parallel_root; |
130 | static smallint force_all_parallel; |
131 | |
132 | #if DO_PROGRESS_INDICATOR |
133 | static smallint progress; |
134 | static int progress_fd; |
135 | #endif |
136 | |
137 | static int num_running; |
138 | static int max_running; |
139 | static char *fstype; |
140 | static struct fs_info *filesys_info; |
141 | static struct fs_info *filesys_last; |
142 | static struct fsck_instance *instance_list; |
143 | |
144 | /* |
145 | * Return the "base device" given a particular device; this is used to |
146 | * assure that we only fsck one partition on a particular drive at any |
147 | * one time. Otherwise, the disk heads will be seeking all over the |
148 | * place. If the base device cannot be determined, return NULL. |
149 | * |
150 | * The base_device() function returns an allocated string which must |
151 | * be freed. |
152 | */ |
153 | #if ENABLE_FEATURE_DEVFS |
154 | /* |
155 | * Required for the uber-silly devfs /dev/ide/host1/bus2/target3/lun3 |
156 | * pathames. |
157 | */ |
158 | static const char *const devfs_hier[] = { |
159 | "host", "bus", "target", "lun", NULL |
160 | }; |
161 | #endif |
162 | |
163 | static char *base_device(const char *device) |
164 | { |
165 | char *str, *cp; |
166 | #if ENABLE_FEATURE_DEVFS |
167 | const char *const *hier; |
168 | const char *disk; |
169 | int len; |
170 | #endif |
171 | cp = str = xstrdup(device); |
172 | |
173 | /* Skip over /dev/; if it's not present, give up. */ |
174 | if (strncmp(cp, "/dev/", 5) != 0) |
175 | goto errout; |
176 | cp += 5; |
177 | |
178 | /* |
179 | * For md devices, we treat them all as if they were all |
180 | * on one disk, since we don't know how to parallelize them. |
181 | */ |
182 | if (cp[0] == 'm' && cp[1] == 'd') { |
183 | cp[2] = 0; |
184 | return str; |
185 | } |
186 | |
187 | /* Handle DAC 960 devices */ |
188 | if (strncmp(cp, "rd/", 3) == 0) { |
189 | cp += 3; |
190 | if (cp[0] != 'c' || !isdigit(cp[1]) |
191 | || cp[2] != 'd' || !isdigit(cp[3])) |
192 | goto errout; |
193 | cp[4] = 0; |
194 | return str; |
195 | } |
196 | |
197 | /* Now let's handle /dev/hd* and /dev/sd* devices.... */ |
198 | if ((cp[0] == 'h' || cp[0] == 's') && cp[1] == 'd') { |
199 | cp += 2; |
200 | /* If there's a single number after /dev/hd, skip it */ |
201 | if (isdigit(*cp)) |
202 | cp++; |
203 | /* What follows must be an alpha char, or give up */ |
204 | if (!isalpha(*cp)) |
205 | goto errout; |
206 | cp[1] = 0; |
207 | return str; |
208 | } |
209 | |
210 | #if ENABLE_FEATURE_DEVFS |
211 | /* Now let's handle devfs (ugh) names */ |
212 | len = 0; |
213 | if (strncmp(cp, "ide/", 4) == 0) |
214 | len = 4; |
215 | if (strncmp(cp, "scsi/", 5) == 0) |
216 | len = 5; |
217 | if (len) { |
218 | cp += len; |
219 | /* |
220 | * Now we proceed down the expected devfs hierarchy. |
221 | * i.e., .../host1/bus2/target3/lun4/... |
222 | * If we don't find the expected token, followed by |
223 | * some number of digits at each level, abort. |
224 | */ |
225 | for (hier = devfs_hier; *hier; hier++) { |
226 | len = strlen(*hier); |
227 | if (strncmp(cp, *hier, len) != 0) |
228 | goto errout; |
229 | cp += len; |
230 | while (*cp != '/' && *cp != 0) { |
231 | if (!isdigit(*cp)) |
232 | goto errout; |
233 | cp++; |
234 | } |
235 | cp++; |
236 | } |
237 | cp[-1] = 0; |
238 | return str; |
239 | } |
240 | |
241 | /* Now handle devfs /dev/disc or /dev/disk names */ |
242 | disk = 0; |
243 | if (strncmp(cp, "discs/", 6) == 0) |
244 | disk = "disc"; |
245 | else if (strncmp(cp, "disks/", 6) == 0) |
246 | disk = "disk"; |
247 | if (disk) { |
248 | cp += 6; |
249 | if (strncmp(cp, disk, 4) != 0) |
250 | goto errout; |
251 | cp += 4; |
252 | while (*cp != '/' && *cp != 0) { |
253 | if (!isdigit(*cp)) |
254 | goto errout; |
255 | cp++; |
256 | } |
257 | *cp = 0; |
258 | return str; |
259 | } |
260 | #endif |
261 | errout: |
262 | free(str); |
263 | return NULL; |
264 | } |
265 | |
266 | static void free_instance(struct fsck_instance *p) |
267 | { |
268 | free(p->prog); |
269 | free(p->device); |
270 | free(p->base_device); |
271 | free(p); |
272 | } |
273 | |
274 | static struct fs_info *create_fs_device(const char *device, const char *mntpnt, |
275 | const char *type, const char *opts, |
276 | int passno) |
277 | { |
278 | struct fs_info *fs; |
279 | |
280 | fs = xzalloc(sizeof(*fs)); |
281 | fs->device = xstrdup(device); |
282 | fs->mountpt = xstrdup(mntpnt); |
283 | if (strchr(type, ',')) |
284 | type = (char *)"auto"; |
285 | fs->type = xstrdup(type); |
286 | fs->opts = xstrdup(opts ? opts : ""); |
287 | fs->passno = passno < 0 ? 1 : passno; |
288 | /*fs->flags = 0; */ |
289 | /*fs->next = NULL; */ |
290 | |
291 | if (!filesys_info) |
292 | filesys_info = fs; |
293 | else |
294 | filesys_last->next = fs; |
295 | filesys_last = fs; |
296 | |
297 | return fs; |
298 | } |
299 | |
300 | /* Load the filesystem database from /etc/fstab */ |
301 | static void load_fs_info(const char *filename) |
302 | { |
303 | FILE *fstab; |
304 | struct mntent mte; |
305 | struct fs_info *fs; |
306 | |
307 | fstab = setmntent(filename, "r"); |
308 | if (!fstab) { |
309 | bb_perror_msg("cannot read %s", filename); |
310 | return; |
311 | } |
312 | |
313 | // Loop through entries |
314 | while (getmntent_r(fstab, &mte, bb_common_bufsiz1, COMMON_BUFSIZE)) { |
315 | //bb_info_msg("CREATE[%s][%s][%s][%s][%d]", mte.mnt_fsname, mte.mnt_dir, |
316 | // mte.mnt_type, mte.mnt_opts, |
317 | // mte.mnt_passno); |
318 | fs = create_fs_device(mte.mnt_fsname, mte.mnt_dir, |
319 | mte.mnt_type, mte.mnt_opts, |
320 | mte.mnt_passno); |
321 | } |
322 | endmntent(fstab); |
323 | } |
324 | |
325 | /* Lookup filesys in /etc/fstab and return the corresponding entry. */ |
326 | static struct fs_info *lookup(char *filesys) |
327 | { |
328 | struct fs_info *fs; |
329 | |
330 | for (fs = filesys_info; fs; fs = fs->next) { |
331 | if (strcmp(filesys, fs->device) == 0 |
332 | || (fs->mountpt && strcmp(filesys, fs->mountpt) == 0) |
333 | ) |
334 | break; |
335 | } |
336 | |
337 | return fs; |
338 | } |
339 | |
340 | #if DO_PROGRESS_INDICATOR |
341 | static int progress_active(void) |
342 | { |
343 | struct fsck_instance *inst; |
344 | |
345 | for (inst = instance_list; inst; inst = inst->next) { |
346 | if (inst->flags & FLAG_DONE) |
347 | continue; |
348 | if (inst->flags & FLAG_PROGRESS) |
349 | return 1; |
350 | } |
351 | return 0; |
352 | } |
353 | #endif |
354 | |
355 | |
356 | /* |
357 | * Send a signal to all outstanding fsck child processes |
358 | */ |
359 | static void kill_all_if_cancel_requested(void) |
360 | { |
361 | static smallint kill_sent; |
362 | |
363 | struct fsck_instance *inst; |
364 | |
365 | if (!cancel_requested || kill_sent) |
366 | return; |
367 | |
368 | for (inst = instance_list; inst; inst = inst->next) { |
369 | if (inst->flags & FLAG_DONE) |
370 | continue; |
371 | kill(inst->pid, SIGTERM); |
372 | } |
373 | kill_sent = 1; |
374 | } |
375 | |
376 | /* |
377 | * Wait for one child process to exit; when it does, unlink it from |
378 | * the list of executing child processes, free, and return its exit status. |
379 | * If there is no exited child, return -1. |
380 | */ |
381 | static int wait_one(int flags) |
382 | { |
383 | int status; |
384 | int sig; |
385 | struct fsck_instance *inst, *prev; |
386 | pid_t pid; |
387 | |
388 | if (!instance_list) |
389 | return -1; |
390 | /* if (noexecute) { already returned -1; } */ |
391 | |
392 | while (1) { |
393 | pid = waitpid(-1, &status, flags); |
394 | kill_all_if_cancel_requested(); |
395 | if (pid == 0) /* flags == WNOHANG and no children exited */ |
396 | return -1; |
397 | if (pid < 0) { |
398 | if (errno == EINTR) |
399 | continue; |
400 | if (errno == ECHILD) { /* paranoia */ |
401 | bb_error_msg("wait: no more children"); |
402 | return -1; |
403 | } |
404 | bb_perror_msg("wait"); |
405 | continue; |
406 | } |
407 | prev = NULL; |
408 | inst = instance_list; |
409 | do { |
410 | if (inst->pid == pid) |
411 | goto child_died; |
412 | prev = inst; |
413 | inst = inst->next; |
414 | } while (inst); |
415 | } |
416 | child_died: |
417 | |
418 | if (WIFEXITED(status)) |
419 | status = WEXITSTATUS(status); |
420 | else if (WIFSIGNALED(status)) { |
421 | sig = WTERMSIG(status); |
422 | status = EXIT_UNCORRECTED; |
423 | if (sig != SIGINT) { |
424 | printf("Warning: %s %s terminated " |
425 | "by signal %d\n", |
426 | inst->prog, inst->device, sig); |
427 | status = EXIT_ERROR; |
428 | } |
429 | } else { |
430 | printf("%s %s: status is %x, should never happen\n", |
431 | inst->prog, inst->device, status); |
432 | status = EXIT_ERROR; |
433 | } |
434 | |
435 | #if DO_PROGRESS_INDICATOR |
436 | if (progress && (inst->flags & FLAG_PROGRESS) && !progress_active()) { |
437 | struct fsck_instance *inst2; |
438 | for (inst2 = instance_list; inst2; inst2 = inst2->next) { |
439 | if (inst2->flags & FLAG_DONE) |
440 | continue; |
441 | if (strcmp(inst2->type, "ext2") != 0 |
442 | && strcmp(inst2->type, "ext3") != 0 |
443 | ) { |
444 | continue; |
445 | } |
446 | /* ext[23], we will send USR1 |
447 | * (request to start displaying progress bar) |
448 | * |
449 | * If we've just started the fsck, wait a tiny |
450 | * bit before sending the kill, to give it |
451 | * time to set up the signal handler |
452 | */ |
453 | if (inst2->start_time >= time(NULL) - 1) |
454 | sleep(1); |
455 | kill(inst2->pid, SIGUSR1); |
456 | inst2->flags |= FLAG_PROGRESS; |
457 | break; |
458 | } |
459 | } |
460 | #endif |
461 | |
462 | if (prev) |
463 | prev->next = inst->next; |
464 | else |
465 | instance_list = inst->next; |
466 | if (verbose > 1) |
467 | printf("Finished with %s (exit status %d)\n", |
468 | inst->device, status); |
469 | num_running--; |
470 | free_instance(inst); |
471 | |
472 | return status; |
473 | } |
474 | |
475 | /* |
476 | * Wait until all executing child processes have exited; return the |
477 | * logical OR of all of their exit code values. |
478 | */ |
479 | #define FLAG_WAIT_ALL 0 |
480 | #define FLAG_WAIT_ATLEAST_ONE WNOHANG |
481 | static int wait_many(int flags) |
482 | { |
483 | int exit_status; |
484 | int global_status = 0; |
485 | int wait_flags = 0; |
486 | |
487 | while ((exit_status = wait_one(wait_flags)) != -1) { |
488 | global_status |= exit_status; |
489 | wait_flags |= flags; |
490 | } |
491 | return global_status; |
492 | } |
493 | |
494 | /* |
495 | * Execute a particular fsck program, and link it into the list of |
496 | * child processes we are waiting for. |
497 | */ |
498 | static void execute(const char *type, const char *device, |
499 | const char *mntpt /*, int interactive */) |
500 | { |
501 | char *argv[num_args + 4]; /* see count below: */ |
502 | int argc; |
503 | int i; |
504 | struct fsck_instance *inst; |
505 | pid_t pid; |
506 | |
507 | argv[0] = xasprintf("fsck.%s", type); /* 1 */ |
508 | for (i = 0; i < num_args; i++) |
509 | argv[i+1] = args[i]; /* num_args */ |
510 | argc = num_args + 1; |
511 | |
512 | #if DO_PROGRESS_INDICATOR |
513 | if (progress && !progress_active()) { |
514 | if (strcmp(type, "ext2") == 0 |
515 | || strcmp(type, "ext3") == 0 |
516 | ) { |
517 | argv[argc++] = xasprintf("-C%d", progress_fd); /* 1 */ |
518 | inst->flags |= FLAG_PROGRESS; |
519 | } |
520 | } |
521 | #endif |
522 | |
523 | argv[argc++] = (char*)device; /* 1 */ |
524 | argv[argc] = NULL; /* 1 */ |
525 | |
526 | if (verbose || noexecute) { |
527 | printf("[%s (%d) -- %s]", argv[0], num_running, |
528 | mntpt ? mntpt : device); |
529 | for (i = 0; i < argc; i++) |
530 | printf(" %s", argv[i]); |
531 | bb_putchar('\n'); |
532 | } |
533 | |
534 | /* Fork and execute the correct program. */ |
535 | pid = -1; |
536 | if (!noexecute) { |
537 | pid = spawn(argv); |
538 | if (pid < 0) |
539 | bb_simple_perror_msg(argv[0]); |
540 | } |
541 | |
542 | #if DO_PROGRESS_INDICATOR |
543 | free(argv[num_args + 1]); |
544 | #endif |
545 | |
546 | /* No child, so don't record an instance */ |
547 | if (pid <= 0) { |
548 | free(argv[0]); |
549 | return; |
550 | } |
551 | |
552 | inst = xzalloc(sizeof(*inst)); |
553 | inst->pid = pid; |
554 | inst->prog = argv[0]; |
555 | inst->device = xstrdup(device); |
556 | inst->base_device = base_device(device); |
557 | #if DO_PROGRESS_INDICATOR |
558 | inst->start_time = time(NULL); |
559 | #endif |
560 | |
561 | /* Add to the list of running fsck's. |
562 | * (was adding to the end, but adding to the front is simpler...) */ |
563 | inst->next = instance_list; |
564 | instance_list = inst; |
565 | } |
566 | |
567 | /* |
568 | * Run the fsck program on a particular device |
569 | * |
570 | * If the type is specified using -t, and it isn't prefixed with "no" |
571 | * (as in "noext2") and only one filesystem type is specified, then |
572 | * use that type regardless of what is specified in /etc/fstab. |
573 | * |
574 | * If the type isn't specified by the user, then use either the type |
575 | * specified in /etc/fstab, or "auto". |
576 | */ |
577 | static void fsck_device(struct fs_info *fs /*, int interactive */) |
578 | { |
579 | const char *type; |
580 | |
581 | if (strcmp(fs->type, "auto") != 0) { |
582 | type = fs->type; |
583 | if (verbose > 2) |
584 | bb_info_msg("using filesystem type '%s' %s", |
585 | type, "from fstab"); |
586 | } else if (fstype |
587 | && (fstype[0] != 'n' || fstype[1] != 'o') /* != "no" */ |
588 | && strncmp(fstype, "opts=", 5) != 0 |
589 | && strncmp(fstype, "loop", 4) != 0 |
590 | && !strchr(fstype, ',') |
591 | ) { |
592 | type = fstype; |
593 | if (verbose > 2) |
594 | bb_info_msg("using filesystem type '%s' %s", |
595 | type, "from -t"); |
596 | } else { |
597 | type = "auto"; |
598 | if (verbose > 2) |
599 | bb_info_msg("using filesystem type '%s' %s", |
600 | type, "(default)"); |
601 | } |
602 | |
603 | num_running++; |
604 | execute(type, fs->device, fs->mountpt /*, interactive */); |
605 | } |
606 | |
607 | /* |
608 | * Returns TRUE if a partition on the same disk is already being |
609 | * checked. |
610 | */ |
611 | static int device_already_active(char *device) |
612 | { |
613 | struct fsck_instance *inst; |
614 | char *base; |
615 | |
616 | if (force_all_parallel) |
617 | return 0; |
618 | |
619 | #ifdef BASE_MD |
620 | /* Don't check a soft raid disk with any other disk */ |
621 | if (instance_list |
622 | && (!strncmp(instance_list->device, BASE_MD, sizeof(BASE_MD)-1) |
623 | || !strncmp(device, BASE_MD, sizeof(BASE_MD)-1)) |
624 | ) { |
625 | return 1; |
626 | } |
627 | #endif |
628 | |
629 | base = base_device(device); |
630 | /* |
631 | * If we don't know the base device, assume that the device is |
632 | * already active if there are any fsck instances running. |
633 | */ |
634 | if (!base) |
635 | return (instance_list != NULL); |
636 | |
637 | for (inst = instance_list; inst; inst = inst->next) { |
638 | if (!inst->base_device || !strcmp(base, inst->base_device)) { |
639 | free(base); |
640 | return 1; |
641 | } |
642 | } |
643 | |
644 | free(base); |
645 | return 0; |
646 | } |
647 | |
648 | /* |
649 | * This function returns true if a particular option appears in a |
650 | * comma-delimited options list |
651 | */ |
652 | static int opt_in_list(char *opt, char *optlist) |
653 | { |
654 | char *s; |
655 | int len; |
656 | |
657 | if (!optlist) |
658 | return 0; |
659 | |
660 | len = strlen(opt); |
661 | s = optlist - 1; |
662 | while (1) { |
663 | s = strstr(s + 1, opt); |
664 | if (!s) |
665 | return 0; |
666 | /* neither "opt.." nor "xxx,opt.."? */ |
667 | if (s != optlist && s[-1] != ',') |
668 | continue; |
669 | /* neither "..opt" nor "..opt,xxx"? */ |
670 | if (s[len] != '\0' && s[len] != ',') |
671 | continue; |
672 | return 1; |
673 | } |
674 | } |
675 | |
676 | /* See if the filesystem matches the criteria given by the -t option */ |
677 | static int fs_match(struct fs_info *fs) |
678 | { |
679 | int n, ret, checked_type; |
680 | char *cp; |
681 | |
682 | if (!fs_type_list) |
683 | return 1; |
684 | |
685 | ret = 0; |
686 | checked_type = 0; |
687 | n = 0; |
688 | while (1) { |
689 | cp = fs_type_list[n]; |
690 | if (!cp) |
691 | break; |
692 | switch (fs_type_flag[n]) { |
693 | case FS_TYPE_FLAG_NORMAL: |
694 | checked_type++; |
695 | if (strcmp(cp, fs->type) == 0) |
696 | ret = 1; |
697 | break; |
698 | case FS_TYPE_FLAG_NEGOPT: |
699 | if (opt_in_list(cp, fs->opts)) |
700 | return 0; |
701 | break; |
702 | case FS_TYPE_FLAG_OPT: |
703 | if (!opt_in_list(cp, fs->opts)) |
704 | return 0; |
705 | break; |
706 | } |
707 | n++; |
708 | } |
709 | if (checked_type == 0) |
710 | return 1; |
711 | |
712 | return (fs_type_negated ? !ret : ret); |
713 | } |
714 | |
715 | /* Check if we should ignore this filesystem. */ |
716 | static int ignore(struct fs_info *fs) |
717 | { |
718 | /* |
719 | * If the pass number is 0, ignore it. |
720 | */ |
721 | if (fs->passno == 0) |
722 | return 1; |
723 | |
724 | /* |
725 | * If a specific fstype is specified, and it doesn't match, |
726 | * ignore it. |
727 | */ |
728 | if (!fs_match(fs)) |
729 | return 1; |
730 | |
731 | /* Are we ignoring this type? */ |
732 | if (index_in_strings(ignored_types, fs->type) >= 0) |
733 | return 1; |
734 | |
735 | /* We can and want to check this file system type. */ |
736 | return 0; |
737 | } |
738 | |
739 | /* Check all file systems, using the /etc/fstab table. */ |
740 | static int check_all(void) |
741 | { |
742 | struct fs_info *fs; |
743 | int status = EXIT_OK; |
744 | smallint not_done_yet; |
745 | smallint pass_done; |
746 | int passno; |
747 | |
748 | if (verbose) |
749 | puts("Checking all filesystems"); |
750 | |
751 | /* |
752 | * Do an initial scan over the filesystem; mark filesystems |
753 | * which should be ignored as done, and resolve any "auto" |
754 | * filesystem types (done as a side-effect of calling ignore()). |
755 | */ |
756 | for (fs = filesys_info; fs; fs = fs->next) |
757 | if (ignore(fs)) |
758 | fs->flags |= FLAG_DONE; |
759 | |
760 | /* |
761 | * Find and check the root filesystem. |
762 | */ |
763 | if (!parallel_root) { |
764 | for (fs = filesys_info; fs; fs = fs->next) { |
765 | if (LONE_CHAR(fs->mountpt, '/')) { |
766 | if (!skip_root && !ignore(fs)) { |
767 | fsck_device(fs /*, 1*/); |
768 | status |= wait_many(FLAG_WAIT_ALL); |
769 | if (status > EXIT_NONDESTRUCT) |
770 | return status; |
771 | } |
772 | fs->flags |= FLAG_DONE; |
773 | break; |
774 | } |
775 | } |
776 | } |
777 | /* |
778 | * This is for the bone-headed user who has root |
779 | * filesystem listed twice. |
780 | * "Skip root" will skip _all_ root entries. |
781 | */ |
782 | if (skip_root) |
783 | for (fs = filesys_info; fs; fs = fs->next) |
784 | if (LONE_CHAR(fs->mountpt, '/')) |
785 | fs->flags |= FLAG_DONE; |
786 | |
787 | not_done_yet = 1; |
788 | passno = 1; |
789 | while (not_done_yet) { |
790 | not_done_yet = 0; |
791 | pass_done = 1; |
792 | |
793 | for (fs = filesys_info; fs; fs = fs->next) { |
794 | if (cancel_requested) |
795 | break; |
796 | if (fs->flags & FLAG_DONE) |
797 | continue; |
798 | /* |
799 | * If the filesystem's pass number is higher |
800 | * than the current pass number, then we didn't |
801 | * do it yet. |
802 | */ |
803 | if (fs->passno > passno) { |
804 | not_done_yet = 1; |
805 | continue; |
806 | } |
807 | /* |
808 | * If a filesystem on a particular device has |
809 | * already been spawned, then we need to defer |
810 | * this to another pass. |
811 | */ |
812 | if (device_already_active(fs->device)) { |
813 | pass_done = 0; |
814 | continue; |
815 | } |
816 | /* |
817 | * Spawn off the fsck process |
818 | */ |
819 | fsck_device(fs /*, serialize*/); |
820 | fs->flags |= FLAG_DONE; |
821 | |
822 | /* |
823 | * Only do one filesystem at a time, or if we |
824 | * have a limit on the number of fsck's extant |
825 | * at one time, apply that limit. |
826 | */ |
827 | if (serialize |
828 | || (max_running && (num_running >= max_running)) |
829 | ) { |
830 | pass_done = 0; |
831 | break; |
832 | } |
833 | } |
834 | if (cancel_requested) |
835 | break; |
836 | if (verbose > 1) |
837 | printf("--waiting-- (pass %d)\n", passno); |
838 | status |= wait_many(pass_done ? FLAG_WAIT_ALL : |
839 | FLAG_WAIT_ATLEAST_ONE); |
840 | if (pass_done) { |
841 | if (verbose > 1) |
842 | puts("----------------------------------"); |
843 | passno++; |
844 | } else |
845 | not_done_yet = 1; |
846 | } |
847 | kill_all_if_cancel_requested(); |
848 | status |= wait_many(FLAG_WAIT_ATLEAST_ONE); |
849 | return status; |
850 | } |
851 | |
852 | /* |
853 | * Deal with the fsck -t argument. |
854 | * Huh, for mount "-t novfat,nfs" means "neither vfat nor nfs"! |
855 | * Why here we require "-t novfat,nonfs" ?? |
856 | */ |
857 | static void compile_fs_type(char *fs_type) |
858 | { |
859 | char *s; |
860 | int num = 2; |
861 | smallint negate; |
862 | |
863 | s = fs_type; |
864 | while ((s = strchr(s, ','))) { |
865 | num++; |
866 | s++; |
867 | } |
868 | |
869 | fs_type_list = xzalloc(num * sizeof(fs_type_list[0])); |
870 | fs_type_flag = xzalloc(num * sizeof(fs_type_flag[0])); |
871 | fs_type_negated = -1; /* not yet known is it negated or not */ |
872 | |
873 | num = 0; |
874 | s = fs_type; |
875 | while (1) { |
876 | char *comma; |
877 | |
878 | negate = 0; |
879 | if (s[0] == 'n' && s[1] == 'o') { /* "no.." */ |
880 | s += 2; |
881 | negate = 1; |
882 | } else if (s[0] == '!') { |
883 | s++; |
884 | negate = 1; |
885 | } |
886 | |
887 | if (strcmp(s, "loop") == 0) |
888 | /* loop is really short-hand for opts=loop */ |
889 | goto loop_special_case; |
890 | if (strncmp(s, "opts=", 5) == 0) { |
891 | s += 5; |
892 | loop_special_case: |
893 | fs_type_flag[num] = negate ? FS_TYPE_FLAG_NEGOPT : FS_TYPE_FLAG_OPT; |
894 | } else { |
895 | if (fs_type_negated == -1) |
896 | fs_type_negated = negate; |
897 | if (fs_type_negated != negate) |
898 | bb_error_msg_and_die( |
899 | "either all or none of the filesystem types passed to -t must be prefixed " |
900 | "with 'no' or '!'"); |
901 | } |
902 | comma = strchr(s, ','); |
903 | fs_type_list[num++] = comma ? xstrndup(s, comma-s) : xstrdup(s); |
904 | if (!comma) |
905 | break; |
906 | s = comma + 1; |
907 | } |
908 | } |
909 | |
910 | static void parse_args(char **argv) |
911 | { |
912 | int i, j; |
913 | char *arg, *tmp; |
914 | char *options; |
915 | int optpos; |
916 | int opts_for_fsck = 0; |
917 | |
918 | /* in bss, so already zeroed |
919 | num_devices = 0; |
920 | num_args = 0; |
921 | instance_list = NULL; |
922 | */ |
923 | |
924 | for (i = 1; argv[i]; i++) { |
925 | arg = argv[i]; |
926 | |
927 | /* "/dev/blk" or "/path" or "UUID=xxx" or "LABEL=xxx" */ |
928 | if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) { |
929 | // FIXME: must check that arg is a blkdev, or resolve |
930 | // "/path", "UUID=xxx" or "LABEL=xxx" into block device name |
931 | // ("UUID=xxx"/"LABEL=xxx" can probably shifted to fsck.auto duties) |
932 | devices = xrealloc_vector(devices, 2, num_devices); |
933 | devices[num_devices++] = xstrdup(arg); |
934 | continue; |
935 | } |
936 | |
937 | if (arg[0] != '-' || opts_for_fsck) { |
938 | args = xrealloc_vector(args, 2, num_args); |
939 | args[num_args++] = xstrdup(arg); |
940 | continue; |
941 | } |
942 | |
943 | if (LONE_CHAR(arg + 1, '-')) { /* "--" ? */ |
944 | opts_for_fsck = 1; |
945 | continue; |
946 | } |
947 | |
948 | optpos = 0; |
949 | options = NULL; |
950 | for (j = 1; arg[j]; j++) { |
951 | switch (arg[j]) { |
952 | case 'A': |
953 | doall = 1; |
954 | break; |
955 | #if DO_PROGRESS_INDICATOR |
956 | case 'C': |
957 | progress = 1; |
958 | if (arg[++j]) { /* -Cn */ |
959 | progress_fd = xatoi_u(&arg[j]); |
960 | goto next_arg; |
961 | } |
962 | /* -C n */ |
963 | if (!argv[++i]) bb_show_usage(); |
964 | progress_fd = xatoi_u(argv[i]); |
965 | goto next_arg; |
966 | #endif |
967 | case 'V': |
968 | verbose++; |
969 | break; |
970 | case 'N': |
971 | noexecute = 1; |
972 | break; |
973 | case 'R': |
974 | skip_root = 1; |
975 | break; |
976 | case 'T': |
977 | notitle = 1; |
978 | break; |
979 | /* case 'M': |
980 | like_mount = 1; |
981 | break; */ |
982 | case 'P': |
983 | parallel_root = 1; |
984 | break; |
985 | case 's': |
986 | serialize = 1; |
987 | break; |
988 | case 't': |
989 | if (fstype) |
990 | bb_show_usage(); |
991 | if (arg[++j]) |
992 | tmp = &arg[j]; |
993 | else if (argv[++i]) |
994 | tmp = argv[i]; |
995 | else |
996 | bb_show_usage(); |
997 | fstype = xstrdup(tmp); |
998 | compile_fs_type(fstype); |
999 | goto next_arg; |
1000 | case '?': |
1001 | bb_show_usage(); |
1002 | break; |
1003 | default: |
1004 | optpos++; |
1005 | /* one extra for '\0' */ |
1006 | options = xrealloc(options, optpos + 2); |
1007 | options[optpos] = arg[j]; |
1008 | break; |
1009 | } |
1010 | } |
1011 | next_arg: |
1012 | if (optpos) { |
1013 | options[0] = '-'; |
1014 | options[optpos + 1] = '\0'; |
1015 | args = xrealloc_vector(args, 2, num_args); |
1016 | args[num_args++] = options; |
1017 | } |
1018 | } |
1019 | if (getenv("FSCK_FORCE_ALL_PARALLEL")) |
1020 | force_all_parallel = 1; |
1021 | tmp = getenv("FSCK_MAX_INST"); |
1022 | if (tmp) |
1023 | max_running = xatoi(tmp); |
1024 | } |
1025 | |
1026 | static void signal_cancel(int sig UNUSED_PARAM) |
1027 | { |
1028 | cancel_requested = 1; |
1029 | } |
1030 | |
1031 | int fsck_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
1032 | int fsck_main(int argc UNUSED_PARAM, char **argv) |
1033 | { |
1034 | int i, status; |
1035 | /*int interactive;*/ |
1036 | const char *fstab; |
1037 | struct fs_info *fs; |
1038 | |
1039 | /* we want wait() to be interruptible */ |
1040 | signal_no_SA_RESTART_empty_mask(SIGINT, signal_cancel); |
1041 | signal_no_SA_RESTART_empty_mask(SIGTERM, signal_cancel); |
1042 | |
1043 | setbuf(stdout, NULL); |
1044 | |
1045 | parse_args(argv); |
1046 | |
1047 | if (!notitle) |
1048 | puts("fsck (busybox "BB_VER", "BB_BT")"); |
1049 | |
1050 | /* Even plain "fsck /dev/hda1" needs fstab to get fs type, |
1051 | * so we are scanning it anyway */ |
1052 | fstab = getenv("FSTAB_FILE"); |
1053 | if (!fstab) |
1054 | fstab = "/etc/fstab"; |
1055 | load_fs_info(fstab); |
1056 | |
1057 | /*interactive = (num_devices == 1) | serialize;*/ |
1058 | |
1059 | if (num_devices == 0) |
1060 | /*interactive =*/ serialize = doall = 1; |
1061 | if (doall) |
1062 | return check_all(); |
1063 | |
1064 | status = 0; |
1065 | for (i = 0; i < num_devices; i++) { |
1066 | if (cancel_requested) { |
1067 | kill_all_if_cancel_requested(); |
1068 | break; |
1069 | } |
1070 | |
1071 | fs = lookup(devices[i]); |
1072 | if (!fs) |
1073 | fs = create_fs_device(devices[i], "", "auto", NULL, -1); |
1074 | fsck_device(fs /*, interactive */); |
1075 | |
1076 | if (serialize |
1077 | || (max_running && (num_running >= max_running)) |
1078 | ) { |
1079 | int exit_status = wait_one(0); |
1080 | if (exit_status >= 0) |
1081 | status |= exit_status; |
1082 | if (verbose > 1) |
1083 | puts("----------------------------------"); |
1084 | } |
1085 | } |
1086 | status |= wait_many(FLAG_WAIT_ALL); |
1087 | return status; |
1088 | } |