blob: 110b3d246f6a53cb3baae3b0df28c7bc0d8d9d14 [file] [log] [blame]
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001/* 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
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +000029/* 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
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000040#include "libbb.h"
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +000041
42#define EXIT_OK 0
43#define EXIT_NONDESTRUCT 1
44#define EXIT_DESTRUCT 2
45#define EXIT_UNCORRECTED 4
46#define EXIT_ERROR 8
47#define EXIT_USAGE 16
48#define FSCK_CANCELED 32 /* Aborted with a signal or ^C */
49
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +000050/*
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +000051 * Internal structure for mount table entries.
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +000052 */
53
54struct fs_info {
Denis Vlasenkoe18a2932007-01-19 02:03:14 +000055 struct fs_info *next;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +000056 char *device;
57 char *mountpt;
58 char *type;
59 char *opts;
60 int freq;
61 int passno;
62 int flags;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +000063};
64
65#define FLAG_DONE 1
66#define FLAG_PROGRESS 2
67/*
68 * Structure to allow exit codes to be stored
69 */
70struct fsck_instance {
Denis Vlasenkoe18a2932007-01-19 02:03:14 +000071 struct fsck_instance *next;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +000072 int pid;
73 int flags;
74 int exit_status;
75 time_t start_time;
76 char *prog;
77 char *type;
78 char *device;
79 char *base_device; /* /dev/hda for /dev/hdaN etc */
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +000080};
81
Denis Vlasenko6ca409e2007-08-12 20:58:27 +000082static const char ignored_types[] ALIGN1 =
Denis Vlasenko990d0f62007-07-24 15:54:42 +000083 "ignore\0"
84 "iso9660\0"
85 "nfs\0"
86 "proc\0"
87 "sw\0"
88 "swap\0"
89 "tmpfs\0"
90 "devpts\0";
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +000091
Denis Vlasenko0de93752006-12-26 02:51:29 +000092#if 0
Denis Vlasenko6ca409e2007-08-12 20:58:27 +000093static const char really_wanted[] ALIGN1 =
Denis Vlasenko990d0f62007-07-24 15:54:42 +000094 "minix\0"
95 "ext2\0"
96 "ext3\0"
97 "jfs\0"
98 "reiserfs\0"
99 "xiafs\0"
100 "xfs\0";
Denis Vlasenko0de93752006-12-26 02:51:29 +0000101#endif
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000102
103#define BASE_MD "/dev/md"
104
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000105static char **devices;
106static char **args;
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +0000107static int num_devices;
108static int num_args;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000109static int verbose;
Denis Vlasenkoe18a2932007-01-19 02:03:14 +0000110
111#define FS_TYPE_FLAG_NORMAL 0
112#define FS_TYPE_FLAG_OPT 1
113#define FS_TYPE_FLAG_NEGOPT 2
114static char **fs_type_list;
115static uint8_t *fs_type_flag;
116static smallint fs_type_negated;
117
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +0000118static volatile smallint cancel_requested;
119static smallint doall;
120static smallint noexecute;
121static smallint serialize;
122static smallint skip_root;
123/* static smallint like_mount; */
124static smallint notitle;
125static smallint parallel_root;
126static smallint force_all_parallel;
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000127
128/* "progress indicator" code is somewhat buggy and ext[23] specific.
129 * We should be filesystem agnostic. IOW: there should be a well-defined
130 * API for fsck.something, NOT ad-hoc hacks in generic fsck. */
131#define DO_PROGRESS_INDICATOR 0
132#if DO_PROGRESS_INDICATOR
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +0000133static smallint progress;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000134static int progress_fd;
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000135#endif
136
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000137static int num_running;
138static int max_running;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000139static char *fstype;
Denis Vlasenko0de93752006-12-26 02:51:29 +0000140static struct fs_info *filesys_info;
141static struct fs_info *filesys_last;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000142static struct fsck_instance *instance_list;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000143
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000144/*
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 */
158static const char *const devfs_hier[] = {
159 "host", "bus", "target", "lun", NULL
160};
161#endif
162
163static 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
266static 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
274static struct fs_info *create_fs_device(const char *device, const char *mntpnt,
275 const char *type, const char *opts,
276 int freq, 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 fs->type = xstrdup(type);
284 fs->opts = xstrdup(opts ? opts : "");
285 fs->freq = freq;
286 fs->passno = passno;
287 /*fs->flags = 0; */
288 /*fs->next = NULL; */
289
290 if (!filesys_info)
291 filesys_info = fs;
292 else
293 filesys_last->next = fs;
294 filesys_last = fs;
295
296 return fs;
297}
298
299static void strip_line(char *line)
300{
301 char *p = line + strlen(line) - 1;
302
303 while (*line) {
304 if (*p != '\n' && *p != '\r')
305 break;
306 *p-- = '\0';
307 }
308}
309
310static char *parse_word(char **buf)
311{
312 char *word, *next;
313
314 word = *buf;
315 if (*word == '\0')
316 return NULL;
317
318 word = skip_whitespace(word);
319 next = skip_non_whitespace(word);
320 if (*next)
321 *next++ = '\0';
322 *buf = next;
323 return word;
324}
325
326static void parse_escape(char *word)
327{
328 char *q, c;
329 const char *p;
330
331 if (!word)
332 return;
333
334 for (p = q = word; *p; q++) {
335 c = *p++;
336 if (c != '\\') {
337 *q = c;
338 } else {
339 *q = bb_process_escape_sequence(&p);
340 }
341 }
342 *q = '\0';
343}
344
345static int parse_fstab_line(char *line, struct fs_info **ret_fs)
346{
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000347 char *device, *mntpnt, *type, *opts, *freq, *passno, *cp;
348 struct fs_info *fs;
349
350 *ret_fs = 0;
351 strip_line(line);
352 cp = strchr(line, '#');
353 if (cp)
354 *cp = '\0'; /* Ignore everything after the comment char */
355 cp = line;
356
357 device = parse_word(&cp);
358 if (!device) return 0; /* Allow blank lines */
359 mntpnt = parse_word(&cp);
360 type = parse_word(&cp);
361 opts = parse_word(&cp);
362 freq = parse_word(&cp);
363 passno = parse_word(&cp);
364
365 if (!mntpnt || !type)
366 return -1;
367
368 parse_escape(device);
369 parse_escape(mntpnt);
370 parse_escape(type);
371 parse_escape(opts);
372 parse_escape(freq);
373 parse_escape(passno);
374
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000375 if (strchr(type, ','))
376 type = NULL;
377
378 fs = create_fs_device(device, mntpnt, type ? type : "auto", opts,
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000379 freq ? atoi(freq) : -1,
380 passno ? atoi(passno) : -1);
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000381 *ret_fs = fs;
382 return 0;
383}
384
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000385/* Load the filesystem database from /etc/fstab */
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000386static void load_fs_info(const char *filename)
387{
388 FILE *f;
389 int lineno = 0;
390 int old_fstab = 1;
391 struct fs_info *fs;
392
393 f = fopen_or_warn(filename, "r");
394 if (f == NULL) {
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000395 return;
396 }
397 while (1) {
398 int r;
399 char *buf = xmalloc_getline(f);
400 if (!buf) break;
401 r = parse_fstab_line(buf, &fs);
402 free(buf);
403 lineno++;
404 if (r < 0) {
405 bb_error_msg("WARNING: bad format "
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +0000406 "on line %d of %s", lineno, filename);
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000407 continue;
408 }
409 if (!fs)
410 continue;
411 if (fs->passno < 0)
412 fs->passno = 0;
413 else
414 old_fstab = 0;
415 }
416 fclose(f);
417
418 if (old_fstab) {
Denis Vlasenko0de93752006-12-26 02:51:29 +0000419 fputs("\007"
420"WARNING: Your /etc/fstab does not contain the fsck passno field.\n"
421"I will kludge around things for you, but you should fix\n"
422"your /etc/fstab file as soon as you can.\n\n", stderr);
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000423 for (fs = filesys_info; fs; fs = fs->next) {
424 fs->passno = 1;
425 }
426 }
427}
428
429/* Lookup filesys in /etc/fstab and return the corresponding entry. */
430static struct fs_info *lookup(char *filesys)
431{
432 struct fs_info *fs;
433
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000434 for (fs = filesys_info; fs; fs = fs->next) {
435 if (strcmp(filesys, fs->device) == 0
436 || (fs->mountpt && strcmp(filesys, fs->mountpt) == 0)
437 )
438 break;
439 }
440
441 return fs;
442}
443
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000444#if DO_PROGRESS_INDICATOR
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000445static int progress_active(void)
446{
447 struct fsck_instance *inst;
448
449 for (inst = instance_list; inst; inst = inst->next) {
450 if (inst->flags & FLAG_DONE)
451 continue;
452 if (inst->flags & FLAG_PROGRESS)
453 return 1;
454 }
455 return 0;
456}
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000457#endif
458
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000459
460/*
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000461 * Send a signal to all outstanding fsck child processes
462 */
Denis Vlasenko0de93752006-12-26 02:51:29 +0000463static void kill_all_if_cancel_requested(void)
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000464{
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +0000465 static smallint kill_sent;
Denis Vlasenko0de93752006-12-26 02:51:29 +0000466
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000467 struct fsck_instance *inst;
Denis Vlasenko0de93752006-12-26 02:51:29 +0000468
469 if (!cancel_requested || kill_sent)
470 return;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000471
472 for (inst = instance_list; inst; inst = inst->next) {
473 if (inst->flags & FLAG_DONE)
474 continue;
Denis Vlasenko0de93752006-12-26 02:51:29 +0000475 kill(inst->pid, SIGTERM);
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000476 }
Denis Vlasenko0de93752006-12-26 02:51:29 +0000477 kill_sent = 1;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000478}
479
480/*
481 * Wait for one child process to exit; when it does, unlink it from
482 * the list of executing child processes, and return it.
483 */
484static struct fsck_instance *wait_one(int flags)
485{
486 int status;
487 int sig;
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000488 struct fsck_instance *inst, *prev;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000489 pid_t pid;
490
491 if (!instance_list)
492 return NULL;
493
494 if (noexecute) {
495 inst = instance_list;
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000496 prev = NULL;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000497#ifdef RANDOM_DEBUG
498 while (inst->next && (random() & 1)) {
499 prev = inst;
500 inst = inst->next;
501 }
502#endif
503 inst->exit_status = 0;
504 goto ret_inst;
505 }
506
Denis Vlasenkoafa70232007-03-26 17:25:33 +0000507 inst = prev = NULL; /* for gcc */
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000508 do {
509 pid = waitpid(-1, &status, flags);
Denis Vlasenko0de93752006-12-26 02:51:29 +0000510 kill_all_if_cancel_requested();
511 if (pid == 0 && (flags & WNOHANG))
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000512 return NULL;
513 if (pid < 0) {
Denis Vlasenko0de93752006-12-26 02:51:29 +0000514 if (errno == EINTR || errno == EAGAIN)
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000515 continue;
516 if (errno == ECHILD) {
517 bb_error_msg("wait: no more child process?!?");
518 return NULL;
519 }
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000520 bb_perror_msg("wait");
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000521 continue;
522 }
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000523 prev = NULL;
524 inst = instance_list;
525 while (inst) {
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000526 if (inst->pid == pid)
527 break;
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000528 prev = inst;
529 inst = inst->next;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000530 }
531 } while (!inst);
532
533 if (WIFEXITED(status))
534 status = WEXITSTATUS(status);
535 else if (WIFSIGNALED(status)) {
536 sig = WTERMSIG(status);
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000537 status = EXIT_UNCORRECTED;
538 if (sig != SIGINT) {
539 printf("Warning... %s %s exited "
540 "with signal %d\n",
541 inst->prog, inst->device, sig);
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000542 status = EXIT_ERROR;
543 }
544 } else {
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000545 printf("%s %s: status is %x, should never happen\n",
546 inst->prog, inst->device, status);
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000547 status = EXIT_ERROR;
548 }
549 inst->exit_status = status;
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000550
551#if DO_PROGRESS_INDICATOR
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +0000552 if (progress && (inst->flags & FLAG_PROGRESS) && !progress_active()) {
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000553 struct fsck_instance *inst2;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000554 for (inst2 = instance_list; inst2; inst2 = inst2->next) {
555 if (inst2->flags & FLAG_DONE)
556 continue;
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000557 if (strcmp(inst2->type, "ext2") != 0
558 && strcmp(inst2->type, "ext3") != 0
559 ) {
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000560 continue;
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000561 }
562 /* ext[23], we will send USR1
563 * (request to start displaying progress bar)
564 *
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000565 * If we've just started the fsck, wait a tiny
566 * bit before sending the kill, to give it
567 * time to set up the signal handler
568 */
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000569 if (inst2->start_time >= time(NULL) - 1)
570 sleep(1);
571 kill(inst2->pid, SIGUSR1);
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000572 inst2->flags |= FLAG_PROGRESS;
573 break;
574 }
575 }
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000576#endif
577
Denis Vlasenko0de93752006-12-26 02:51:29 +0000578 ret_inst:
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000579 if (prev)
580 prev->next = inst->next;
581 else
582 instance_list = inst->next;
583 if (verbose > 1)
584 printf("Finished with %s (exit status %d)\n",
585 inst->device, inst->exit_status);
586 num_running--;
587 return inst;
588}
589
590#define FLAG_WAIT_ALL 0
591#define FLAG_WAIT_ATLEAST_ONE 1
592/*
593 * Wait until all executing child processes have exited; return the
594 * logical OR of all of their exit code values.
595 */
596static int wait_many(int flags)
597{
598 struct fsck_instance *inst;
599 int global_status = 0;
600 int wait_flags = 0;
601
602 while ((inst = wait_one(wait_flags))) {
603 global_status |= inst->exit_status;
604 free_instance(inst);
605#ifdef RANDOM_DEBUG
606 if (noexecute && (flags & WNOHANG) && !(random() % 3))
607 break;
608#endif
609 if (flags & FLAG_WAIT_ATLEAST_ONE)
610 wait_flags = WNOHANG;
611 }
612 return global_status;
613}
614
615/*
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000616 * Execute a particular fsck program, and link it into the list of
617 * child processes we are waiting for.
618 */
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000619static void execute(const char *type, const char *device, const char *mntpt,
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000620 int interactive)
621{
622 char *argv[num_args + 4]; /* see count below: */
623 int argc;
624 int i;
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000625 struct fsck_instance *inst;
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000626 pid_t pid;
627
628 inst = xzalloc(sizeof(*inst));
629
630 argv[0] = xasprintf("fsck.%s", type); /* 1 */
631 for (i = 0; i < num_args; i++)
632 argv[i+1] = args[i]; /* num_args */
633 argc = num_args + 1;
634
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000635#if DO_PROGRESS_INDICATOR
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000636 if (progress && !progress_active()) {
637 if (strcmp(type, "ext2") == 0
638 || strcmp(type, "ext3") == 0
639 ) {
640 argv[argc++] = xasprintf("-C%d", progress_fd); /* 1 */
641 inst->flags |= FLAG_PROGRESS;
642 }
643 }
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000644#endif
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000645
646 argv[argc++] = xstrdup(device); /* 1 */
647 argv[argc] = NULL; /* 1 */
648
649 if (verbose || noexecute) {
650 printf("[%s (%d) -- %s]", argv[0], num_running,
651 mntpt ? mntpt : device);
652 for (i = 0; i < argc; i++)
653 printf(" %s", argv[i]);
Denis Vlasenko4daad902007-09-27 10:20:47 +0000654 bb_putchar('\n');
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000655 }
656
657 /* Fork and execute the correct program. */
658 pid = -1;
659 if (!noexecute) {
Denis Vlasenko53091ec2007-03-26 13:35:09 +0000660 pid = spawn(argv);
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000661 if (pid < 0)
Denis Vlasenko0c97c9d2007-10-01 11:58:38 +0000662 bb_simple_perror_msg(argv[0]);
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000663 }
664
665 for (i = num_args+1; i < argc; i++)
666 free(argv[i]);
667
668 inst->pid = pid;
669 inst->prog = argv[0];
670 inst->type = xstrdup(type);
671 inst->device = xstrdup(device);
672 inst->base_device = base_device(device);
673 inst->start_time = time(NULL);
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000674
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000675 /* Add to the list of running fsck's.
676 * (was adding to the end, but adding to the front is simpler...) */
677 inst->next = instance_list;
678 instance_list = inst;
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000679}
680
681/*
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000682 * Run the fsck program on a particular device
683 *
684 * If the type is specified using -t, and it isn't prefixed with "no"
685 * (as in "noext2") and only one filesystem type is specified, then
686 * use that type regardless of what is specified in /etc/fstab.
687 *
688 * If the type isn't specified by the user, then use either the type
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000689 * specified in /etc/fstab, or "auto".
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000690 */
691static void fsck_device(struct fs_info *fs, int interactive)
692{
693 const char *type;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000694
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000695 if (strcmp(fs->type, "auto") != 0) {
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000696 type = fs->type;
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000697 if (verbose > 2)
698 bb_info_msg("using filesystem type '%s' %s",
699 type, "from fstab");
700 } else if (fstype
Denis Vlasenko0de93752006-12-26 02:51:29 +0000701 && (fstype[0] != 'n' || fstype[1] != 'o') /* != "no" */
702 && strncmp(fstype, "opts=", 5) != 0
703 && strncmp(fstype, "loop", 4) != 0
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000704 && !strchr(fstype, ',')
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000705 ) {
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000706 type = fstype;
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000707 if (verbose > 2)
708 bb_info_msg("using filesystem type '%s' %s",
709 type, "from -t");
710 } else {
711 type = "auto";
712 if (verbose > 2)
713 bb_info_msg("using filesystem type '%s' %s",
714 type, "(default)");
715 }
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000716
717 num_running++;
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +0000718 execute(type, fs->device, fs->mountpt, interactive);
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000719}
720
721/*
Denis Vlasenkoe18a2932007-01-19 02:03:14 +0000722 * Returns TRUE if a partition on the same disk is already being
723 * checked.
724 */
725static int device_already_active(char *device)
726{
727 struct fsck_instance *inst;
728 char *base;
729
730 if (force_all_parallel)
731 return 0;
732
733#ifdef BASE_MD
734 /* Don't check a soft raid disk with any other disk */
735 if (instance_list
736 && (!strncmp(instance_list->device, BASE_MD, sizeof(BASE_MD)-1)
737 || !strncmp(device, BASE_MD, sizeof(BASE_MD)-1))
738 ) {
739 return 1;
740 }
741#endif
742
743 base = base_device(device);
744 /*
745 * If we don't know the base device, assume that the device is
746 * already active if there are any fsck instances running.
747 */
748 if (!base)
749 return (instance_list != NULL);
750
751 for (inst = instance_list; inst; inst = inst->next) {
752 if (!inst->base_device || !strcmp(base, inst->base_device)) {
753 free(base);
754 return 1;
755 }
756 }
757
758 free(base);
759 return 0;
760}
761
762/*
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000763 * This function returns true if a particular option appears in a
764 * comma-delimited options list
765 */
766static int opt_in_list(char *opt, char *optlist)
767{
Denis Vlasenkoe18a2932007-01-19 02:03:14 +0000768 char *s;
769 int len;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000770
771 if (!optlist)
772 return 0;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000773
Denis Vlasenkoe18a2932007-01-19 02:03:14 +0000774 len = strlen(opt);
775 s = optlist - 1;
776 while (1) {
777 s = strstr(s + 1, opt);
778 if (!s)
779 return 0;
780 /* neither "opt.." nor "xxx,opt.."? */
781 if (s != optlist && s[-1] != ',')
782 continue;
783 /* neither "..opt" nor "..opt,xxx"? */
784 if (s[len] != '\0' && s[len] != ',')
785 continue;
786 return 1;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000787 }
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000788}
789
790/* See if the filesystem matches the criteria given by the -t option */
791static int fs_match(struct fs_info *fs)
792{
Denis Vlasenkoe18a2932007-01-19 02:03:14 +0000793 int n, ret, checked_type;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000794 char *cp;
795
796 if (!fs_type_list)
797 return 1;
798
Denis Vlasenkoe18a2932007-01-19 02:03:14 +0000799 ret = 0;
800 checked_type = 0;
801 n = 0;
802 while (1) {
803 cp = fs_type_list[n];
804 if (!cp)
805 break;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000806 switch (fs_type_flag[n]) {
807 case FS_TYPE_FLAG_NORMAL:
808 checked_type++;
809 if (strcmp(cp, fs->type) == 0)
810 ret = 1;
811 break;
812 case FS_TYPE_FLAG_NEGOPT:
813 if (opt_in_list(cp, fs->opts))
814 return 0;
815 break;
816 case FS_TYPE_FLAG_OPT:
817 if (!opt_in_list(cp, fs->opts))
818 return 0;
819 break;
820 }
Denis Vlasenkoe18a2932007-01-19 02:03:14 +0000821 n++;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000822 }
823 if (checked_type == 0)
824 return 1;
825
826 return (fs_type_negated ? !ret : ret);
827}
828
829/* Check if we should ignore this filesystem. */
830static int ignore(struct fs_info *fs)
831{
832 /*
833 * If the pass number is 0, ignore it.
834 */
835 if (fs->passno == 0)
836 return 1;
837
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000838 /*
839 * If a specific fstype is specified, and it doesn't match,
840 * ignore it.
841 */
842 if (!fs_match(fs))
843 return 1;
844
845 /* Are we ignoring this type? */
Denis Vlasenko990d0f62007-07-24 15:54:42 +0000846 if (index_in_strings(ignored_types, fs->type) >= 0)
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000847 return 1;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000848
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000849 /* We can and want to check this file system type. */
850 return 0;
851}
852
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000853/* Check all file systems, using the /etc/fstab table. */
854static int check_all(void)
855{
Denis Vlasenkoe18a2932007-01-19 02:03:14 +0000856 struct fs_info *fs;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000857 int status = EXIT_OK;
Denis Vlasenkoe18a2932007-01-19 02:03:14 +0000858 smallint not_done_yet;
859 smallint pass_done;
860 int passno;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000861
862 if (verbose)
863 puts("Checking all filesystems");
864
865 /*
866 * Do an initial scan over the filesystem; mark filesystems
867 * which should be ignored as done, and resolve any "auto"
868 * filesystem types (done as a side-effect of calling ignore()).
869 */
870 for (fs = filesys_info; fs; fs = fs->next) {
871 if (ignore(fs))
872 fs->flags |= FLAG_DONE;
873 }
874
875 /*
876 * Find and check the root filesystem.
877 */
878 if (!parallel_root) {
879 for (fs = filesys_info; fs; fs = fs->next) {
880 if (LONE_CHAR(fs->mountpt, '/'))
881 break;
882 }
883 if (fs) {
884 if (!skip_root && !ignore(fs)) {
885 fsck_device(fs, 1);
886 status |= wait_many(FLAG_WAIT_ALL);
887 if (status > EXIT_NONDESTRUCT)
888 return status;
889 }
890 fs->flags |= FLAG_DONE;
891 }
892 }
893 /*
894 * This is for the bone-headed user who enters the root
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +0000895 * filesystem twice. Skip root will skip all root entries.
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000896 */
897 if (skip_root)
898 for (fs = filesys_info; fs; fs = fs->next)
899 if (LONE_CHAR(fs->mountpt, '/'))
900 fs->flags |= FLAG_DONE;
901
Denis Vlasenkoe18a2932007-01-19 02:03:14 +0000902 not_done_yet = 1;
903 passno = 1;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000904 while (not_done_yet) {
905 not_done_yet = 0;
906 pass_done = 1;
907
908 for (fs = filesys_info; fs; fs = fs->next) {
909 if (cancel_requested)
910 break;
911 if (fs->flags & FLAG_DONE)
912 continue;
913 /*
914 * If the filesystem's pass number is higher
915 * than the current pass number, then we don't
916 * do it yet.
917 */
918 if (fs->passno > passno) {
Denis Vlasenkoe18a2932007-01-19 02:03:14 +0000919 not_done_yet = 1;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000920 continue;
921 }
922 /*
923 * If a filesystem on a particular device has
924 * already been spawned, then we need to defer
925 * this to another pass.
926 */
927 if (device_already_active(fs->device)) {
928 pass_done = 0;
929 continue;
930 }
931 /*
932 * Spawn off the fsck process
933 */
934 fsck_device(fs, serialize);
935 fs->flags |= FLAG_DONE;
936
937 /*
938 * Only do one filesystem at a time, or if we
939 * have a limit on the number of fsck's extant
940 * at one time, apply that limit.
941 */
942 if (serialize
943 || (max_running && (num_running >= max_running))
944 ) {
945 pass_done = 0;
946 break;
947 }
948 }
949 if (cancel_requested)
950 break;
951 if (verbose > 1)
952 printf("--waiting-- (pass %d)\n", passno);
953 status |= wait_many(pass_done ? FLAG_WAIT_ALL :
954 FLAG_WAIT_ATLEAST_ONE);
955 if (pass_done) {
956 if (verbose > 1)
957 puts("----------------------------------");
958 passno++;
959 } else
Denis Vlasenkoe18a2932007-01-19 02:03:14 +0000960 not_done_yet = 1;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000961 }
Denis Vlasenko0de93752006-12-26 02:51:29 +0000962 kill_all_if_cancel_requested();
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000963 status |= wait_many(FLAG_WAIT_ATLEAST_ONE);
964 return status;
965}
966
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000967/*
968 * Deal with the fsck -t argument.
969 * Huh, for mount "-t novfat,nfs" means "neither vfat nor nfs"!
970 * Why here we require "-t novfat,nonfs" ??
971 */
972static void compile_fs_type(char *fs_type)
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000973{
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000974 char *s;
975 int num = 2;
976 smallint negate;
977
978 if (fs_type) {
979 s = fs_type;
980 while ((s = strchr(s, ','))) {
981 num++;
982 s++;
983 }
984 }
985
986 fs_type_list = xzalloc(num * sizeof(fs_type_list[0]));
987 fs_type_flag = xzalloc(num * sizeof(fs_type_flag[0]));
988 fs_type_negated = -1; /* not yet known is it negated or not */
989
990 if (!fs_type)
991 return;
992
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000993 num = 0;
Denis Vlasenko1abf91a2007-01-19 02:02:33 +0000994 s = fs_type;
995 while (1) {
996 char *comma;
997
998 negate = 0;
999 if (s[0] == 'n' && s[1] == 'o') { /* "no.." */
1000 s += 2;
1001 negate = 1;
1002 } else if (s[0] == '!') {
1003 s++;
1004 negate = 1;
1005 }
Denis Vlasenkoe18a2932007-01-19 02:03:14 +00001006
Denis Vlasenko1abf91a2007-01-19 02:02:33 +00001007 if (strcmp(s, "loop") == 0)
1008 /* loop is really short-hand for opts=loop */
1009 goto loop_special_case;
1010 if (strncmp(s, "opts=", 5) == 0) {
1011 s += 5;
1012 loop_special_case:
1013 fs_type_flag[num] = negate ? FS_TYPE_FLAG_NEGOPT : FS_TYPE_FLAG_OPT;
1014 } else {
1015 if (fs_type_negated == -1)
1016 fs_type_negated = negate;
1017 if (fs_type_negated != negate)
1018 bb_error_msg_and_die(
1019"either all or none of the filesystem types passed to -t must be prefixed "
1020"with 'no' or '!'");
1021 }
1022 comma = strchr(s, ',');
1023 fs_type_list[num++] = comma ? xstrndup(s, comma-s) : xstrdup(s);
1024 if (!comma)
1025 break;
1026 s = comma + 1;
Denis Vlasenko1abf91a2007-01-19 02:02:33 +00001027 }
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001028}
1029
Bernhard Reutner-Fischerfebe3c42007-04-04 20:52:03 +00001030static void parse_args(int argc, char **argv)
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001031{
1032 int i, j;
1033 char *arg, *tmp;
1034 char *options = NULL;
1035 int optpos = 0;
1036 int opts_for_fsck = 0;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001037
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +00001038 /* in bss, so already zeroed
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001039 num_devices = 0;
1040 num_args = 0;
Denis Vlasenko1abf91a2007-01-19 02:02:33 +00001041 instance_list = NULL;
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +00001042 */
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001043
1044/* TODO: getopt32 */
1045 for (i = 1; i < argc; i++) {
1046 arg = argv[i];
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +00001047
Denis Vlasenko1abf91a2007-01-19 02:02:33 +00001048 /* "/dev/blk" or "/path" or "UUID=xxx" or "LABEL=xxx" */
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001049 if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) {
Denis Vlasenko1abf91a2007-01-19 02:02:33 +00001050// FIXME: must check that arg is a blkdev, or resolve
1051// "/path", "UUID=xxx" or "LABEL=xxx" into block device name
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +00001052// ("UUID=xxx"/"LABEL=xxx" can probably shifted to fsck.auto duties)
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001053 devices = xrealloc(devices, (num_devices+1) * sizeof(devices[0]));
1054 devices[num_devices++] = xstrdup(arg);
1055 continue;
1056 }
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +00001057
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001058 if (arg[0] != '-' || opts_for_fsck) {
1059 args = xrealloc(args, (num_args+1) * sizeof(args[0]));
1060 args[num_args++] = xstrdup(arg);
1061 continue;
1062 }
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +00001063
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001064 for (j = 1; arg[j]; j++) {
1065 if (opts_for_fsck) {
1066 optpos++;
1067 /* one extra for '\0' */
1068 options = xrealloc(options, optpos + 2);
1069 options[optpos] = arg[j];
1070 continue;
1071 }
1072 switch (arg[j]) {
1073 case 'A':
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +00001074 doall = 1;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001075 break;
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +00001076#if DO_PROGRESS_INDICATOR
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001077 case 'C':
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +00001078 progress = 1;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001079 if (arg[++j]) { /* -Cn */
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +00001080 progress_fd = xatoi_u(&arg[j]);
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001081 goto next_arg;
1082 }
1083 /* -C n */
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +00001084 progress_fd = xatoi_u(argv[++i]);
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001085 goto next_arg;
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +00001086#endif
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001087 case 'V':
1088 verbose++;
1089 break;
1090 case 'N':
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +00001091 noexecute = 1;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001092 break;
1093 case 'R':
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +00001094 skip_root = 1;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001095 break;
1096 case 'T':
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +00001097 notitle = 1;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001098 break;
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +00001099/* case 'M':
1100 like_mount = 1;
1101 break; */
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001102 case 'P':
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +00001103 parallel_root = 1;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001104 break;
1105 case 's':
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +00001106 serialize = 1;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001107 break;
1108 case 't':
1109 if (fstype)
1110 bb_show_usage();
1111 if (arg[++j])
1112 tmp = &arg[j];
1113 else if (++i < argc)
1114 tmp = argv[i];
1115 else
1116 bb_show_usage();
1117 fstype = xstrdup(tmp);
1118 compile_fs_type(fstype);
1119 goto next_arg;
1120 case '-':
1121 opts_for_fsck++;
1122 break;
1123 case '?':
1124 bb_show_usage();
1125 break;
1126 default:
1127 optpos++;
1128 /* one extra for '\0' */
1129 options = xrealloc(options, optpos + 2);
1130 options[optpos] = arg[j];
1131 break;
1132 }
1133 }
1134 next_arg:
1135 if (optpos) {
1136 options[0] = '-';
1137 options[optpos + 1] = '\0';
1138 args = xrealloc(args, (num_args+1) * sizeof(args[0]));
1139 args[num_args++] = options;
1140 optpos = 0;
1141 options = NULL;
1142 }
1143 }
1144 if (getenv("FSCK_FORCE_ALL_PARALLEL"))
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +00001145 force_all_parallel = 1;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001146 tmp = getenv("FSCK_MAX_INST");
1147 if (tmp)
1148 max_running = xatoi(tmp);
1149}
1150
Denis Vlasenko1abf91a2007-01-19 02:02:33 +00001151static void signal_cancel(int sig ATTRIBUTE_UNUSED)
1152{
1153 cancel_requested = 1;
1154}
1155
Bernhard Reutner-Fischerfebe3c42007-04-04 20:52:03 +00001156int fsck_main(int argc, char **argv);
1157int fsck_main(int argc, char **argv)
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001158{
1159 int i, status = 0;
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +00001160 int interactive;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001161 const char *fstab;
1162 struct fs_info *fs;
Denis Vlasenko1abf91a2007-01-19 02:02:33 +00001163 struct sigaction sa;
1164
Denis Vlasenko1abf91a2007-01-19 02:02:33 +00001165 memset(&sa, 0, sizeof(sa));
1166 sa.sa_handler = signal_cancel;
1167 sigaction(SIGINT, &sa, 0);
1168 sigaction(SIGTERM, &sa, 0);
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001169
1170 setbuf(stdout, NULL);
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001171
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001172 parse_args(argc, argv);
1173
1174 if (!notitle)
1175 puts("fsck (busybox "BB_VER", "BB_BT")");
1176
Denis Vlasenko1abf91a2007-01-19 02:02:33 +00001177 /* Even plain "fsck /dev/hda1" needs fstab to get fs type,
1178 * so we are scanning it anyway */
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001179 fstab = getenv("FSTAB_FILE");
1180 if (!fstab)
1181 fstab = "/etc/fstab";
1182 load_fs_info(fstab);
1183
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +00001184 interactive = (num_devices == 1) | serialize;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001185
1186 /* If -A was specified ("check all"), do that! */
1187 if (doall)
1188 return check_all();
1189
1190 if (num_devices == 0) {
Denis Vlasenkoa0e701d2007-01-19 02:01:19 +00001191 serialize = 1;
1192 interactive = 1;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001193 return check_all();
1194 }
1195
Denis Vlasenko0de93752006-12-26 02:51:29 +00001196 for (i = 0; i < num_devices; i++) {
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001197 if (cancel_requested) {
Denis Vlasenko0de93752006-12-26 02:51:29 +00001198 kill_all_if_cancel_requested();
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001199 break;
1200 }
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +00001201
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001202 fs = lookup(devices[i]);
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +00001203 if (!fs)
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001204 fs = create_fs_device(devices[i], 0, "auto", 0, -1, -1);
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001205 fsck_device(fs, interactive);
Denis Vlasenkof8c11aa2007-01-19 02:04:09 +00001206
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001207 if (serialize
1208 || (max_running && (num_running >= max_running))
1209 ) {
1210 struct fsck_instance *inst;
1211
1212 inst = wait_one(0);
1213 if (inst) {
1214 status |= inst->exit_status;
1215 free_instance(inst);
1216 }
1217 if (verbose > 1)
1218 puts("----------------------------------");
1219 }
1220 }
1221 status |= wait_many(FLAG_WAIT_ALL);
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001222 return status;
1223}