source: MondoRescue/branches/2.2.2/mindi-busybox/e2fsprogs/fsck.c@ 1247

Last change on this file since 1247 was 821, checked in by Bruno Cornec, 18 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)
File size: 28.1 KB
Line 
1/*
2 * pfsck --- A generic, parallelizing front-end for the fsck program.
3 * It will automatically try to run fsck programs in parallel if the
4 * devices are on separate spindles. It is based on the same ideas as
5 * the generic front end for fsck by David Engel and Fred van Kempen,
6 * but it has been completely rewritten from scratch to support
7 * parallel execution.
8 *
9 * Written by Theodore Ts'o, <tytso@mit.edu>
10 *
11 * Miquel van Smoorenburg (miquels@drinkel.ow.org) 20-Oct-1994:
12 * o Changed -t fstype to behave like with mount when -A (all file
13 * systems) or -M (like mount) is specified.
14 * o fsck looks if it can find the fsck.type program to decide
15 * if it should ignore the fs type. This way more fsck programs
16 * can be added without changing this front-end.
17 * o -R flag skip root file system.
18 *
19 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
20 * 2001, 2002, 2003, 2004, 2005 by Theodore Ts'o.
21 *
22 * %Begin-Header%
23 * This file may be redistributed under the terms of the GNU Public
24 * License.
25 * %End-Header%
26 */
27
28#include <sys/types.h>
29#include <sys/wait.h>
30#include <sys/stat.h>
31#include <limits.h>
32#include <stdio.h>
33#include <ctype.h>
34#include <string.h>
35#include <time.h>
36#include <stdlib.h>
37#include <errno.h>
38#include <paths.h>
39#include <unistd.h>
40#include <errno.h>
41#include <signal.h>
42
43#include "fsck.h"
44#include "blkid/blkid.h"
45
46#include "e2fsbb.h"
47
48#include "busybox.h"
49
50#ifndef _PATH_MNTTAB
51#define _PATH_MNTTAB "/etc/fstab"
52#endif
53
54/*
55 * fsck.h
56 */
57
58#ifndef DEFAULT_FSTYPE
59#define DEFAULT_FSTYPE "ext2"
60#endif
61
62#define MAX_DEVICES 32
63#define MAX_ARGS 32
64
65/*
66 * Internal structure for mount tabel entries.
67 */
68
69struct fs_info {
70 char *device;
71 char *mountpt;
72 char *type;
73 char *opts;
74 int freq;
75 int passno;
76 int flags;
77 struct fs_info *next;
78};
79
80#define FLAG_DONE 1
81#define FLAG_PROGRESS 2
82
83/*
84 * Structure to allow exit codes to be stored
85 */
86struct fsck_instance {
87 int pid;
88 int flags;
89 int exit_status;
90 time_t start_time;
91 char * prog;
92 char * type;
93 char * device;
94 char * base_device;
95 struct fsck_instance *next;
96};
97
98/*
99 * base_device.c
100 *
101 * Return the "base device" given a particular device; this is used to
102 * assure that we only fsck one partition on a particular drive at any
103 * one time. Otherwise, the disk heads will be seeking all over the
104 * place. If the base device can not be determined, return NULL.
105 *
106 * The base_device() function returns an allocated string which must
107 * be freed.
108 *
109 */
110
111
112#ifdef CONFIG_FEATURE_DEVFS
113/*
114 * Required for the uber-silly devfs /dev/ide/host1/bus2/target3/lun3
115 * pathames.
116 */
117static const char * const devfs_hier[] = {
118 "host", "bus", "target", "lun", 0
119};
120#endif
121
122static char *base_device(const char *device)
123{
124 char *str, *cp;
125#ifdef CONFIG_FEATURE_DEVFS
126 const char * const *hier;
127 const char *disk;
128 int len;
129#endif
130
131 cp = str = bb_xstrdup(device);
132
133 /* Skip over /dev/; if it's not present, give up. */
134 if (strncmp(cp, "/dev/", 5) != 0)
135 goto errout;
136 cp += 5;
137
138#if 0 /* this is for old stuff no one uses anymore ? */
139 /* Skip over /dev/dsk/... */
140 if (strncmp(cp, "dsk/", 4) == 0)
141 cp += 4;
142#endif
143
144 /*
145 * For md devices, we treat them all as if they were all
146 * on one disk, since we don't know how to parallelize them.
147 */
148 if (cp[0] == 'm' && cp[1] == 'd') {
149 *(cp+2) = 0;
150 return str;
151 }
152
153 /* Handle DAC 960 devices */
154 if (strncmp(cp, "rd/", 3) == 0) {
155 cp += 3;
156 if (cp[0] != 'c' || cp[2] != 'd' ||
157 !isdigit(cp[1]) || !isdigit(cp[3]))
158 goto errout;
159 *(cp+4) = 0;
160 return str;
161 }
162
163 /* Now let's handle /dev/hd* and /dev/sd* devices.... */
164 if ((cp[0] == 'h' || cp[0] == 's') && (cp[1] == 'd')) {
165 cp += 2;
166 /* If there's a single number after /dev/hd, skip it */
167 if (isdigit(*cp))
168 cp++;
169 /* What follows must be an alpha char, or give up */
170 if (!isalpha(*cp))
171 goto errout;
172 *(cp + 1) = 0;
173 return str;
174 }
175
176#ifdef CONFIG_FEATURE_DEVFS
177 /* Now let's handle devfs (ugh) names */
178 len = 0;
179 if (strncmp(cp, "ide/", 4) == 0)
180 len = 4;
181 if (strncmp(cp, "scsi/", 5) == 0)
182 len = 5;
183 if (len) {
184 cp += len;
185 /*
186 * Now we proceed down the expected devfs hierarchy.
187 * i.e., .../host1/bus2/target3/lun4/...
188 * If we don't find the expected token, followed by
189 * some number of digits at each level, abort.
190 */
191 for (hier = devfs_hier; *hier; hier++) {
192 len = strlen(*hier);
193 if (strncmp(cp, *hier, len) != 0)
194 goto errout;
195 cp += len;
196 while (*cp != '/' && *cp != 0) {
197 if (!isdigit(*cp))
198 goto errout;
199 cp++;
200 }
201 cp++;
202 }
203 *(cp - 1) = 0;
204 return str;
205 }
206
207 /* Now handle devfs /dev/disc or /dev/disk names */
208 disk = 0;
209 if (strncmp(cp, "discs/", 6) == 0)
210 disk = "disc";
211 else if (strncmp(cp, "disks/", 6) == 0)
212 disk = "disk";
213 if (disk) {
214 cp += 6;
215 if (strncmp(cp, disk, 4) != 0)
216 goto errout;
217 cp += 4;
218 while (*cp != '/' && *cp != 0) {
219 if (!isdigit(*cp))
220 goto errout;
221 cp++;
222 }
223 *cp = 0;
224 return str;
225 }
226#endif
227
228errout:
229 free(str);
230 return NULL;
231}
232
233
234static const char * const ignored_types[] = {
235 "ignore",
236 "iso9660",
237 "nfs",
238 "proc",
239 "sw",
240 "swap",
241 "tmpfs",
242 "devpts",
243 NULL
244};
245
246static const char * const really_wanted[] = {
247 "minix",
248 "ext2",
249 "ext3",
250 "jfs",
251 "reiserfs",
252 "xiafs",
253 "xfs",
254 NULL
255};
256
257#define BASE_MD "/dev/md"
258
259/*
260 * Global variables for options
261 */
262static char *devices[MAX_DEVICES];
263static char *args[MAX_ARGS];
264static int num_devices, num_args;
265
266static int verbose;
267static int doall;
268static int noexecute;
269static int serialize;
270static int skip_root;
271static int like_mount;
272static int notitle;
273static int parallel_root;
274static int progress;
275static int progress_fd;
276static int force_all_parallel;
277static int num_running;
278static int max_running;
279static volatile int cancel_requested;
280static int kill_sent;
281static char *fstype;
282static struct fs_info *filesys_info, *filesys_last;
283static struct fsck_instance *instance_list;
284static char *fsck_path;
285static blkid_cache cache;
286
287static char *string_copy(const char *s)
288{
289 char *ret;
290
291 if (!s)
292 return 0;
293 ret = strdup(s);
294 return ret;
295}
296
297static int string_to_int(const char *s)
298{
299 long l;
300 char *p;
301
302 l = strtol(s, &p, 0);
303 if (*p || l == LONG_MIN || l == LONG_MAX || l < 0 || l > INT_MAX)
304 return -1;
305 else
306 return (int) l;
307}
308
309static char *skip_over_blank(char *cp)
310{
311 while (*cp && isspace(*cp))
312 cp++;
313 return cp;
314}
315
316static char *skip_over_word(char *cp)
317{
318 while (*cp && !isspace(*cp))
319 cp++;
320 return cp;
321}
322
323static void strip_line(char *line)
324{
325 char *p;
326
327 while (*line) {
328 p = line + strlen(line) - 1;
329 if ((*p == '\n') || (*p == '\r'))
330 *p = 0;
331 else
332 break;
333 }
334}
335
336static char *parse_word(char **buf)
337{
338 char *word, *next;
339
340 word = *buf;
341 if (*word == 0)
342 return 0;
343
344 word = skip_over_blank(word);
345 next = skip_over_word(word);
346 if (*next)
347 *next++ = 0;
348 *buf = next;
349 return word;
350}
351
352static void parse_escape(char *word)
353{
354 char *q, c;
355 const char *p;
356
357 if (!word)
358 return;
359
360 for (p = q = word; *p; q++) {
361 c = *p++;
362 if (c != '\\') {
363 *q = c;
364 } else {
365 *q = bb_process_escape_sequence(&p);
366 }
367 }
368 *q = 0;
369}
370
371static void free_instance(struct fsck_instance *i)
372{
373 if (i->prog)
374 free(i->prog);
375 if (i->device)
376 free(i->device);
377 if (i->base_device)
378 free(i->base_device);
379 free(i);
380 return;
381}
382
383static struct fs_info *create_fs_device(const char *device, const char *mntpnt,
384 const char *type, const char *opts,
385 int freq, int passno)
386{
387 struct fs_info *fs;
388
389 if (!(fs = malloc(sizeof(struct fs_info))))
390 return NULL;
391
392 fs->device = string_copy(device);
393 fs->mountpt = string_copy(mntpnt);
394 fs->type = string_copy(type);
395 fs->opts = string_copy(opts ? opts : "");
396 fs->freq = freq;
397 fs->passno = passno;
398 fs->flags = 0;
399 fs->next = NULL;
400
401 if (!filesys_info)
402 filesys_info = fs;
403 else
404 filesys_last->next = fs;
405 filesys_last = fs;
406
407 return fs;
408}
409
410
411
412static int parse_fstab_line(char *line, struct fs_info **ret_fs)
413{
414 char *dev, *device, *mntpnt, *type, *opts, *freq, *passno, *cp;
415 struct fs_info *fs;
416
417 *ret_fs = 0;
418 strip_line(line);
419 if ((cp = strchr(line, '#')))
420 *cp = 0; /* Ignore everything after the comment char */
421 cp = line;
422
423 device = parse_word(&cp);
424 mntpnt = parse_word(&cp);
425 type = parse_word(&cp);
426 opts = parse_word(&cp);
427 freq = parse_word(&cp);
428 passno = parse_word(&cp);
429
430 if (!device)
431 return 0; /* Allow blank lines */
432
433 if (!mntpnt || !type)
434 return -1;
435
436 parse_escape(device);
437 parse_escape(mntpnt);
438 parse_escape(type);
439 parse_escape(opts);
440 parse_escape(freq);
441 parse_escape(passno);
442
443 dev = blkid_get_devname(cache, device, NULL);
444 if (dev)
445 device = dev;
446
447 if (strchr(type, ','))
448 type = 0;
449
450 fs = create_fs_device(device, mntpnt, type ? type : "auto", opts,
451 freq ? atoi(freq) : -1,
452 passno ? atoi(passno) : -1);
453 if (dev)
454 free(dev);
455
456 if (!fs)
457 return -1;
458 *ret_fs = fs;
459 return 0;
460}
461
462static void interpret_type(struct fs_info *fs)
463{
464 char *t;
465
466 if (strcmp(fs->type, "auto") != 0)
467 return;
468 t = blkid_get_tag_value(cache, "TYPE", fs->device);
469 if (t) {
470 free(fs->type);
471 fs->type = t;
472 }
473}
474
475/*
476 * Load the filesystem database from /etc/fstab
477 */
478static void load_fs_info(const char *filename)
479{
480 FILE *f;
481 char buf[1024];
482 int lineno = 0;
483 int old_fstab = 1;
484 struct fs_info *fs;
485
486 if ((f = fopen(filename, "r")) == NULL) {
487 bb_perror_msg("WARNING: couldn't open %s", filename);
488 return;
489 }
490 while (!feof(f)) {
491 lineno++;
492 if (!fgets(buf, sizeof(buf), f))
493 break;
494 buf[sizeof(buf)-1] = 0;
495 if (parse_fstab_line(buf, &fs) < 0) {
496 bb_error_msg("WARNING: bad format "
497 "on line %d of %s\n", lineno, filename);
498 continue;
499 }
500 if (!fs)
501 continue;
502 if (fs->passno < 0)
503 fs->passno = 0;
504 else
505 old_fstab = 0;
506 }
507
508 fclose(f);
509
510 if (old_fstab) {
511 fputs("\007\007\007"
512 "WARNING: Your /etc/fstab does not contain the fsck passno\n"
513 " field. I will kludge around things for you, but you\n"
514 " should fix your /etc/fstab file as soon as you can.\n\n", stderr);
515
516 for (fs = filesys_info; fs; fs = fs->next) {
517 fs->passno = 1;
518 }
519 }
520}
521
522/* Lookup filesys in /etc/fstab and return the corresponding entry. */
523static struct fs_info *lookup(char *filesys)
524{
525 struct fs_info *fs;
526
527 /* No filesys name given. */
528 if (filesys == NULL)
529 return NULL;
530
531 for (fs = filesys_info; fs; fs = fs->next) {
532 if (!strcmp(filesys, fs->device) ||
533 (fs->mountpt && !strcmp(filesys, fs->mountpt)))
534 break;
535 }
536
537 return fs;
538}
539
540/* Find fsck program for a given fs type. */
541static char *find_fsck(char *type)
542{
543 char *s;
544 const char *tpl;
545 char *p = string_copy(fsck_path);
546 struct stat st;
547
548 /* Are we looking for a program or just a type? */
549 tpl = (strncmp(type, "fsck.", 5) ? "%s/fsck.%s" : "%s/%s");
550
551 for(s = strtok(p, ":"); s; s = strtok(NULL, ":")) {
552 s = bb_xasprintf(tpl, s, type);
553 if (stat(s, &st) == 0) break;
554 free(s);
555 }
556 free(p);
557 return(s);
558}
559
560static int progress_active(void)
561{
562 struct fsck_instance *inst;
563
564 for (inst = instance_list; inst; inst = inst->next) {
565 if (inst->flags & FLAG_DONE)
566 continue;
567 if (inst->flags & FLAG_PROGRESS)
568 return 1;
569 }
570 return 0;
571}
572
573/*
574 * Execute a particular fsck program, and link it into the list of
575 * child processes we are waiting for.
576 */
577static int execute(const char *type, const char *device, const char *mntpt,
578 int interactive)
579{
580 char *s, *argv[80];
581 char *prog;
582 int argc, i;
583 struct fsck_instance *inst, *p;
584 pid_t pid;
585
586 inst = malloc(sizeof(struct fsck_instance));
587 if (!inst)
588 return ENOMEM;
589 memset(inst, 0, sizeof(struct fsck_instance));
590
591 prog = bb_xasprintf("fsck.%s", type);
592 argv[0] = prog;
593 argc = 1;
594
595 for (i=0; i <num_args; i++)
596 argv[argc++] = string_copy(args[i]);
597
598 if (progress && !progress_active()) {
599 if ((strcmp(type, "ext2") == 0) ||
600 (strcmp(type, "ext3") == 0)) {
601 char tmp[80];
602 snprintf(tmp, 80, "-C%d", progress_fd);
603 argv[argc++] = string_copy(tmp);
604 inst->flags |= FLAG_PROGRESS;
605 }
606 }
607
608 argv[argc++] = string_copy(device);
609 argv[argc] = 0;
610
611 s = find_fsck(prog);
612 if (s == NULL) {
613 bb_error_msg("%s: not found", prog);
614 return ENOENT;
615 }
616
617 if (verbose || noexecute) {
618 printf("[%s (%d) -- %s] ", s, num_running,
619 mntpt ? mntpt : device);
620 for (i=0; i < argc; i++)
621 printf("%s ", argv[i]);
622 printf("\n");
623 }
624
625 /* Fork and execute the correct program. */
626 if (noexecute)
627 pid = -1;
628 else if ((pid = fork()) < 0) {
629 perror("fork");
630 return errno;
631 } else if (pid == 0) {
632 if (!interactive)
633 close(0);
634 (void) execv(s, argv);
635 bb_perror_msg_and_die("%s", argv[0]);
636 }
637
638 for (i = 1; i < argc; i++)
639 free(argv[i]);
640
641 free(s);
642 inst->pid = pid;
643 inst->prog = prog;
644 inst->type = string_copy(type);
645 inst->device = string_copy(device);
646 inst->base_device = base_device(device);
647 inst->start_time = time(0);
648 inst->next = NULL;
649
650 /*
651 * Find the end of the list, so we add the instance on at the end.
652 */
653 for (p = instance_list; p && p->next; p = p->next);
654
655 if (p)
656 p->next = inst;
657 else
658 instance_list = inst;
659
660 return 0;
661}
662
663/*
664 * Send a signal to all outstanding fsck child processes
665 */
666static int kill_all(int signum)
667{
668 struct fsck_instance *inst;
669 int n = 0;
670
671 for (inst = instance_list; inst; inst = inst->next) {
672 if (inst->flags & FLAG_DONE)
673 continue;
674 kill(inst->pid, signum);
675 n++;
676 }
677 return n;
678}
679
680/*
681 * Wait for one child process to exit; when it does, unlink it from
682 * the list of executing child processes, and return it.
683 */
684static struct fsck_instance *wait_one(int flags)
685{
686 int status;
687 int sig;
688 struct fsck_instance *inst, *inst2, *prev;
689 pid_t pid;
690
691 if (!instance_list)
692 return NULL;
693
694 if (noexecute) {
695 inst = instance_list;
696 prev = 0;
697#ifdef RANDOM_DEBUG
698 while (inst->next && (random() & 1)) {
699 prev = inst;
700 inst = inst->next;
701 }
702#endif
703 inst->exit_status = 0;
704 goto ret_inst;
705 }
706
707 /*
708 * gcc -Wall fails saving throw against stupidity
709 * (inst and prev are thought to be uninitialized variables)
710 */
711 inst = prev = NULL;
712
713 do {
714 pid = waitpid(-1, &status, flags);
715 if (cancel_requested && !kill_sent) {
716 kill_all(SIGTERM);
717 kill_sent++;
718 }
719 if ((pid == 0) && (flags & WNOHANG))
720 return NULL;
721 if (pid < 0) {
722 if ((errno == EINTR) || (errno == EAGAIN))
723 continue;
724 if (errno == ECHILD) {
725 bb_error_msg("wait: No more child process?!?");
726 return NULL;
727 }
728 perror("wait");
729 continue;
730 }
731 for (prev = 0, inst = instance_list;
732 inst;
733 prev = inst, inst = inst->next) {
734 if (inst->pid == pid)
735 break;
736 }
737 } while (!inst);
738
739 if (WIFEXITED(status))
740 status = WEXITSTATUS(status);
741 else if (WIFSIGNALED(status)) {
742 sig = WTERMSIG(status);
743 if (sig == SIGINT) {
744 status = EXIT_UNCORRECTED;
745 } else {
746 printf("Warning... %s for device %s exited "
747 "with signal %d.\n",
748 inst->prog, inst->device, sig);
749 status = EXIT_ERROR;
750 }
751 } else {
752 printf("%s %s: status is %x, should never happen.\n",
753 inst->prog, inst->device, status);
754 status = EXIT_ERROR;
755 }
756 inst->exit_status = status;
757 if (progress && (inst->flags & FLAG_PROGRESS) &&
758 !progress_active()) {
759 for (inst2 = instance_list; inst2; inst2 = inst2->next) {
760 if (inst2->flags & FLAG_DONE)
761 continue;
762 if (strcmp(inst2->type, "ext2") &&
763 strcmp(inst2->type, "ext3"))
764 continue;
765 /*
766 * If we've just started the fsck, wait a tiny
767 * bit before sending the kill, to give it
768 * time to set up the signal handler
769 */
770 if (inst2->start_time < time(0)+2) {
771 if (fork() == 0) {
772 sleep(1);
773 kill(inst2->pid, SIGUSR1);
774 exit(0);
775 }
776 } else
777 kill(inst2->pid, SIGUSR1);
778 inst2->flags |= FLAG_PROGRESS;
779 break;
780 }
781 }
782ret_inst:
783 if (prev)
784 prev->next = inst->next;
785 else
786 instance_list = inst->next;
787 if (verbose > 1)
788 printf("Finished with %s (exit status %d)\n",
789 inst->device, inst->exit_status);
790 num_running--;
791 return inst;
792}
793
794#define FLAG_WAIT_ALL 0
795#define FLAG_WAIT_ATLEAST_ONE 1
796/*
797 * Wait until all executing child processes have exited; return the
798 * logical OR of all of their exit code values.
799 */
800static int wait_many(int flags)
801{
802 struct fsck_instance *inst;
803 int global_status = 0;
804 int wait_flags = 0;
805
806 while ((inst = wait_one(wait_flags))) {
807 global_status |= inst->exit_status;
808 free_instance(inst);
809#ifdef RANDOM_DEBUG
810 if (noexecute && (flags & WNOHANG) && !(random() % 3))
811 break;
812#endif
813 if (flags & FLAG_WAIT_ATLEAST_ONE)
814 wait_flags = WNOHANG;
815 }
816 return global_status;
817}
818
819/*
820 * Run the fsck program on a particular device
821 *
822 * If the type is specified using -t, and it isn't prefixed with "no"
823 * (as in "noext2") and only one filesystem type is specified, then
824 * use that type regardless of what is specified in /etc/fstab.
825 *
826 * If the type isn't specified by the user, then use either the type
827 * specified in /etc/fstab, or DEFAULT_FSTYPE.
828 */
829static void fsck_device(struct fs_info *fs, int interactive)
830{
831 const char *type;
832 int retval;
833
834 interpret_type(fs);
835
836 if (strcmp(fs->type, "auto") != 0)
837 type = fs->type;
838 else if (fstype && strncmp(fstype, "no", 2) &&
839 strncmp(fstype, "opts=", 5) && strncmp(fstype, "loop", 4) &&
840 !strchr(fstype, ','))
841 type = fstype;
842 else
843 type = DEFAULT_FSTYPE;
844
845 num_running++;
846 retval = execute(type, fs->device, fs->mountpt, interactive);
847 if (retval) {
848 bb_error_msg("Error %d while executing fsck.%s for %s",
849 retval, type, fs->device);
850 num_running--;
851 }
852}
853
854
855/*
856 * Deal with the fsck -t argument.
857 */
858struct fs_type_compile {
859 char **list;
860 int *type;
861 int negate;
862} fs_type_compiled;
863
864#define FS_TYPE_NORMAL 0
865#define FS_TYPE_OPT 1
866#define FS_TYPE_NEGOPT 2
867
868static const char fs_type_syntax_error[] =
869"Either all or none of the filesystem types passed to -t must be prefixed\n"
870 "with 'no' or '!'.";
871
872static void compile_fs_type(char *fs_type, struct fs_type_compile *cmp)
873{
874 char *cp, *list, *s;
875 int num = 2;
876 int negate, first_negate = 1;
877
878 if (fs_type) {
879 for (cp=fs_type; *cp; cp++) {
880 if (*cp == ',')
881 num++;
882 }
883 }
884
885 cmp->list = xcalloc(num, sizeof(char *));
886 cmp->type = xcalloc(num, sizeof(int));
887 cmp->negate = 0;
888
889 if (!fs_type)
890 return;
891
892 list = string_copy(fs_type);
893 num = 0;
894 s = strtok(list, ",");
895 while(s) {
896 negate = 0;
897 if (strncmp(s, "no", 2) == 0) {
898 s += 2;
899 negate = 1;
900 } else if (*s == '!') {
901 s++;
902 negate = 1;
903 }
904 if (strcmp(s, "loop") == 0)
905 /* loop is really short-hand for opts=loop */
906 goto loop_special_case;
907 else if (strncmp(s, "opts=", 5) == 0) {
908 s += 5;
909 loop_special_case:
910 cmp->type[num] = negate ? FS_TYPE_NEGOPT : FS_TYPE_OPT;
911 } else {
912 if (first_negate) {
913 cmp->negate = negate;
914 first_negate = 0;
915 }
916 if ((negate && !cmp->negate) ||
917 (!negate && cmp->negate)) {
918 bb_error_msg_and_die("%s", fs_type_syntax_error);
919 }
920 }
921#if 0
922 printf("Adding %s to list (type %d).\n", s, cmp->type[num]);
923#endif
924 cmp->list[num++] = string_copy(s);
925 s = strtok(NULL, ",");
926 }
927 free(list);
928}
929
930/*
931 * This function returns true if a particular option appears in a
932 * comma-delimited options list
933 */
934static int opt_in_list(char *opt, char *optlist)
935{
936 char *list, *s;
937
938 if (!optlist)
939 return 0;
940 list = string_copy(optlist);
941
942 s = strtok(list, ",");
943 while(s) {
944 if (strcmp(s, opt) == 0) {
945 free(list);
946 return 1;
947 }
948 s = strtok(NULL, ",");
949 }
950 free(list);
951 return 0;
952}
953
954/* See if the filesystem matches the criteria given by the -t option */
955static int fs_match(struct fs_info *fs, struct fs_type_compile *cmp)
956{
957 int n, ret = 0, checked_type = 0;
958 char *cp;
959
960 if (cmp->list == 0 || cmp->list[0] == 0)
961 return 1;
962
963 for (n=0; (cp = cmp->list[n]); n++) {
964 switch (cmp->type[n]) {
965 case FS_TYPE_NORMAL:
966 checked_type++;
967 if (strcmp(cp, fs->type) == 0) {
968 ret = 1;
969 }
970 break;
971 case FS_TYPE_NEGOPT:
972 if (opt_in_list(cp, fs->opts))
973 return 0;
974 break;
975 case FS_TYPE_OPT:
976 if (!opt_in_list(cp, fs->opts))
977 return 0;
978 break;
979 }
980 }
981 if (checked_type == 0)
982 return 1;
983 return (cmp->negate ? !ret : ret);
984}
985
986/* Check if we should ignore this filesystem. */
987static int ignore(struct fs_info *fs)
988{
989 int wanted;
990 char *s;
991
992 /*
993 * If the pass number is 0, ignore it.
994 */
995 if (fs->passno == 0)
996 return 1;
997
998 interpret_type(fs);
999
1000 /*
1001 * If a specific fstype is specified, and it doesn't match,
1002 * ignore it.
1003 */
1004 if (!fs_match(fs, &fs_type_compiled)) return 1;
1005
1006 /* Are we ignoring this type? */
1007 if(compare_string_array(ignored_types, fs->type) >= 0)
1008 return 1;
1009
1010 /* Do we really really want to check this fs? */
1011 wanted = compare_string_array(really_wanted, fs->type) >= 0;
1012
1013 /* See if the <fsck.fs> program is available. */
1014 s = find_fsck(fs->type);
1015 if (s == NULL) {
1016 if (wanted)
1017 bb_error_msg("cannot check %s: fsck.%s not found",
1018 fs->device, fs->type);
1019 return 1;
1020 }
1021 free(s);
1022
1023 /* We can and want to check this file system type. */
1024 return 0;
1025}
1026
1027/*
1028 * Returns TRUE if a partition on the same disk is already being
1029 * checked.
1030 */
1031static int device_already_active(char *device)
1032{
1033 struct fsck_instance *inst;
1034 char *base;
1035
1036 if (force_all_parallel)
1037 return 0;
1038
1039#ifdef BASE_MD
1040 /* Don't check a soft raid disk with any other disk */
1041 if (instance_list &&
1042 (!strncmp(instance_list->device, BASE_MD, sizeof(BASE_MD)-1) ||
1043 !strncmp(device, BASE_MD, sizeof(BASE_MD)-1)))
1044 return 1;
1045#endif
1046
1047 base = base_device(device);
1048 /*
1049 * If we don't know the base device, assume that the device is
1050 * already active if there are any fsck instances running.
1051 */
1052 if (!base)
1053 return (instance_list != 0);
1054 for (inst = instance_list; inst; inst = inst->next) {
1055 if (!inst->base_device || !strcmp(base, inst->base_device)) {
1056 free(base);
1057 return 1;
1058 }
1059 }
1060 free(base);
1061 return 0;
1062}
1063
1064/* Check all file systems, using the /etc/fstab table. */
1065static int check_all(void)
1066{
1067 struct fs_info *fs = NULL;
1068 int status = EXIT_OK;
1069 int not_done_yet = 1;
1070 int passno = 1;
1071 int pass_done;
1072
1073 if (verbose)
1074 fputs("Checking all file systems.\n", stdout);
1075
1076 /*
1077 * Do an initial scan over the filesystem; mark filesystems
1078 * which should be ignored as done, and resolve any "auto"
1079 * filesystem types (done as a side-effect of calling ignore()).
1080 */
1081 for (fs = filesys_info; fs; fs = fs->next) {
1082 if (ignore(fs))
1083 fs->flags |= FLAG_DONE;
1084 }
1085
1086 /*
1087 * Find and check the root filesystem.
1088 */
1089 if (!parallel_root) {
1090 for (fs = filesys_info; fs; fs = fs->next) {
1091 if (!strcmp(fs->mountpt, "/"))
1092 break;
1093 }
1094 if (fs) {
1095 if (!skip_root && !ignore(fs)) {
1096 fsck_device(fs, 1);
1097 status |= wait_many(FLAG_WAIT_ALL);
1098 if (status > EXIT_NONDESTRUCT)
1099 return status;
1100 }
1101 fs->flags |= FLAG_DONE;
1102 }
1103 }
1104 /*
1105 * This is for the bone-headed user who enters the root
1106 * filesystem twice. Skip root will skep all root entries.
1107 */
1108 if (skip_root)
1109 for (fs = filesys_info; fs; fs = fs->next)
1110 if (!strcmp(fs->mountpt, "/"))
1111 fs->flags |= FLAG_DONE;
1112
1113 while (not_done_yet) {
1114 not_done_yet = 0;
1115 pass_done = 1;
1116
1117 for (fs = filesys_info; fs; fs = fs->next) {
1118 if (cancel_requested)
1119 break;
1120 if (fs->flags & FLAG_DONE)
1121 continue;
1122 /*
1123 * If the filesystem's pass number is higher
1124 * than the current pass number, then we don't
1125 * do it yet.
1126 */
1127 if (fs->passno > passno) {
1128 not_done_yet++;
1129 continue;
1130 }
1131 /*
1132 * If a filesystem on a particular device has
1133 * already been spawned, then we need to defer
1134 * this to another pass.
1135 */
1136 if (device_already_active(fs->device)) {
1137 pass_done = 0;
1138 continue;
1139 }
1140 /*
1141 * Spawn off the fsck process
1142 */
1143 fsck_device(fs, serialize);
1144 fs->flags |= FLAG_DONE;
1145
1146 /*
1147 * Only do one filesystem at a time, or if we
1148 * have a limit on the number of fsck's extant
1149 * at one time, apply that limit.
1150 */
1151 if (serialize ||
1152 (max_running && (num_running >= max_running))) {
1153 pass_done = 0;
1154 break;
1155 }
1156 }
1157 if (cancel_requested)
1158 break;
1159 if (verbose > 1)
1160 printf("--waiting-- (pass %d)\n", passno);
1161 status |= wait_many(pass_done ? FLAG_WAIT_ALL :
1162 FLAG_WAIT_ATLEAST_ONE);
1163 if (pass_done) {
1164 if (verbose > 1)
1165 printf("----------------------------------\n");
1166 passno++;
1167 } else
1168 not_done_yet++;
1169 }
1170 if (cancel_requested && !kill_sent) {
1171 kill_all(SIGTERM);
1172 kill_sent++;
1173 }
1174 status |= wait_many(FLAG_WAIT_ATLEAST_ONE);
1175 return status;
1176}
1177
1178static void signal_cancel(int sig FSCK_ATTR((unused)))
1179{
1180 cancel_requested++;
1181}
1182
1183static void PRS(int argc, char *argv[])
1184{
1185 int i, j;
1186 char *arg, *dev, *tmp = 0;
1187 char options[128];
1188 int opt = 0;
1189 int opts_for_fsck = 0;
1190 struct sigaction sa;
1191
1192 /*
1193 * Set up signal action
1194 */
1195 memset(&sa, 0, sizeof(struct sigaction));
1196 sa.sa_handler = signal_cancel;
1197 sigaction(SIGINT, &sa, 0);
1198 sigaction(SIGTERM, &sa, 0);
1199
1200 num_devices = 0;
1201 num_args = 0;
1202 instance_list = 0;
1203
1204 for (i=1; i < argc; i++) {
1205 arg = argv[i];
1206 if (!arg)
1207 continue;
1208 if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) {
1209 if (num_devices >= MAX_DEVICES) {
1210 bb_error_msg_and_die("too many devices");
1211 }
1212 dev = blkid_get_devname(cache, arg, NULL);
1213 if (!dev && strchr(arg, '=')) {
1214 /*
1215 * Check to see if we failed because
1216 * /proc/partitions isn't found.
1217 */
1218 if (access("/proc/partitions", R_OK) < 0) {
1219 bb_error_msg_and_die("Couldn't open /proc/partitions: %m\n"
1220 "Is /proc mounted?");
1221 }
1222 /*
1223 * Check to see if this is because
1224 * we're not running as root
1225 */
1226 if (geteuid())
1227 bb_error_msg_and_die(
1228 "Must be root to scan for matching filesystems: %s\n", arg);
1229 else
1230 bb_error_msg_and_die(
1231 "Couldn't find matching filesystem: %s", arg);
1232 }
1233 devices[num_devices++] = dev ? dev : string_copy(arg);
1234 continue;
1235 }
1236 if (arg[0] != '-' || opts_for_fsck) {
1237 if (num_args >= MAX_ARGS) {
1238 bb_error_msg_and_die("too many arguments");
1239 }
1240 args[num_args++] = string_copy(arg);
1241 continue;
1242 }
1243 for (j=1; arg[j]; j++) {
1244 if (opts_for_fsck) {
1245 options[++opt] = arg[j];
1246 continue;
1247 }
1248 switch (arg[j]) {
1249 case 'A':
1250 doall++;
1251 break;
1252 case 'C':
1253 progress++;
1254 if (arg[j+1]) {
1255 progress_fd = string_to_int(arg+j+1);
1256 if (progress_fd < 0)
1257 progress_fd = 0;
1258 else
1259 goto next_arg;
1260 } else if ((i+1) < argc &&
1261 !strncmp(argv[i+1], "-", 1) == 0) {
1262 progress_fd = string_to_int(argv[i]);
1263 if (progress_fd < 0)
1264 progress_fd = 0;
1265 else {
1266 goto next_arg;
1267 i++;
1268 }
1269 }
1270 break;
1271 case 'V':
1272 verbose++;
1273 break;
1274 case 'N':
1275 noexecute++;
1276 break;
1277 case 'R':
1278 skip_root++;
1279 break;
1280 case 'T':
1281 notitle++;
1282 break;
1283 case 'M':
1284 like_mount++;
1285 break;
1286 case 'P':
1287 parallel_root++;
1288 break;
1289 case 's':
1290 serialize++;
1291 break;
1292 case 't':
1293 tmp = 0;
1294 if (fstype)
1295 bb_show_usage();
1296 if (arg[j+1])
1297 tmp = arg+j+1;
1298 else if ((i+1) < argc)
1299 tmp = argv[++i];
1300 else
1301 bb_show_usage();
1302 fstype = string_copy(tmp);
1303 compile_fs_type(fstype, &fs_type_compiled);
1304 goto next_arg;
1305 case '-':
1306 opts_for_fsck++;
1307 break;
1308 case '?':
1309 bb_show_usage();
1310 break;
1311 default:
1312 options[++opt] = arg[j];
1313 break;
1314 }
1315 }
1316 next_arg:
1317 if (opt) {
1318 options[0] = '-';
1319 options[++opt] = '\0';
1320 if (num_args >= MAX_ARGS) {
1321 bb_error_msg("too many arguments");
1322 }
1323 args[num_args++] = string_copy(options);
1324 opt = 0;
1325 }
1326 }
1327 if (getenv("FSCK_FORCE_ALL_PARALLEL"))
1328 force_all_parallel++;
1329 if ((tmp = getenv("FSCK_MAX_INST")))
1330 max_running = atoi(tmp);
1331}
1332
1333int fsck_main(int argc, char *argv[])
1334{
1335 int i, status = 0;
1336 int interactive = 0;
1337 const char *fstab;
1338 struct fs_info *fs;
1339
1340 setvbuf(stdout, NULL, _IONBF, BUFSIZ);
1341 setvbuf(stderr, NULL, _IONBF, BUFSIZ);
1342
1343 blkid_get_cache(&cache, NULL);
1344 PRS(argc, argv);
1345
1346 if (!notitle)
1347 printf("fsck %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1348
1349 fstab = getenv("FSTAB_FILE");
1350 if (!fstab)
1351 fstab = _PATH_MNTTAB;
1352 load_fs_info(fstab);
1353
1354 fsck_path = e2fs_set_sbin_path();
1355
1356 if ((num_devices == 1) || (serialize))
1357 interactive = 1;
1358
1359 /* If -A was specified ("check all"), do that! */
1360 if (doall)
1361 return check_all();
1362
1363 if (num_devices == 0) {
1364 serialize++;
1365 interactive++;
1366 return check_all();
1367 }
1368 for (i = 0 ; i < num_devices; i++) {
1369 if (cancel_requested) {
1370 if (!kill_sent) {
1371 kill_all(SIGTERM);
1372 kill_sent++;
1373 }
1374 break;
1375 }
1376 fs = lookup(devices[i]);
1377 if (!fs) {
1378 fs = create_fs_device(devices[i], 0, "auto",
1379 0, -1, -1);
1380 if (!fs)
1381 continue;
1382 }
1383 fsck_device(fs, interactive);
1384 if (serialize ||
1385 (max_running && (num_running >= max_running))) {
1386 struct fsck_instance *inst;
1387
1388 inst = wait_one(0);
1389 if (inst) {
1390 status |= inst->exit_status;
1391 free_instance(inst);
1392 }
1393 if (verbose > 1)
1394 printf("----------------------------------\n");
1395 }
1396 }
1397 status |= wait_many(FLAG_WAIT_ALL);
1398 blkid_put_cache(cache);
1399 return status;
1400}
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