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-rw-r--r--e2fsprogs/fsck.c1392
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diff --git a/e2fsprogs/fsck.c b/e2fsprogs/fsck.c
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index da66250f1..000000000
--- a/e2fsprogs/fsck.c
+++ /dev/null
@@ -1,1392 +0,0 @@
1/* vi: set sw=4 ts=4: */
2/*
3 * pfsck --- 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#include <sys/types.h>
30#include <sys/wait.h>
31#include <sys/stat.h>
32#include <limits.h>
33#include <stdio.h>
34#include <ctype.h>
35#include <string.h>
36#include <time.h>
37#include <stdlib.h>
38#include <errno.h>
39#include <paths.h>
40#include <unistd.h>
41#include <errno.h>
42#include <signal.h>
43
44#include "fsck.h"
45#include "blkid/blkid.h"
46
47#include "e2fsbb.h"
48
49#include "busybox.h"
50
51#ifndef _PATH_MNTTAB
52#define _PATH_MNTTAB "/etc/fstab"
53#endif
54
55/*
56 * fsck.h
57 */
58
59#ifndef DEFAULT_FSTYPE
60#define DEFAULT_FSTYPE "ext2"
61#endif
62
63#define MAX_DEVICES 32
64#define MAX_ARGS 32
65
66/*
67 * Internal structure for mount tabel entries.
68 */
69
70struct fs_info {
71 char *device;
72 char *mountpt;
73 char *type;
74 char *opts;
75 int freq;
76 int passno;
77 int flags;
78 struct fs_info *next;
79};
80
81#define FLAG_DONE 1
82#define FLAG_PROGRESS 2
83
84/*
85 * Structure to allow exit codes to be stored
86 */
87struct fsck_instance {
88 int pid;
89 int flags;
90 int exit_status;
91 time_t start_time;
92 char * prog;
93 char * type;
94 char * device;
95 char * base_device;
96 struct fsck_instance *next;
97};
98
99/*
100 * base_device.c
101 *
102 * Return the "base device" given a particular device; this is used to
103 * assure that we only fsck one partition on a particular drive at any
104 * one time. Otherwise, the disk heads will be seeking all over the
105 * place. If the base device cannot be determined, return NULL.
106 *
107 * The base_device() function returns an allocated string which must
108 * be freed.
109 *
110 */
111
112
113#ifdef CONFIG_FEATURE_DEVFS
114/*
115 * Required for the uber-silly devfs /dev/ide/host1/bus2/target3/lun3
116 * pathames.
117 */
118static const char * const devfs_hier[] = {
119 "host", "bus", "target", "lun", 0
120};
121#endif
122
123static char *base_device(const char *device)
124{
125 char *str, *cp;
126#ifdef CONFIG_FEATURE_DEVFS
127 const char * const *hier;
128 const char *disk;
129 int len;
130#endif
131
132 cp = str = xstrdup(device);
133
134 /* Skip over /dev/; if it's not present, give up. */
135 if (strncmp(cp, "/dev/", 5) != 0)
136 goto errout;
137 cp += 5;
138
139 /*
140 * For md devices, we treat them all as if they were all
141 * on one disk, since we don't know how to parallelize them.
142 */
143 if (cp[0] == 'm' && cp[1] == 'd') {
144 *(cp+2) = 0;
145 return str;
146 }
147
148 /* Handle DAC 960 devices */
149 if (strncmp(cp, "rd/", 3) == 0) {
150 cp += 3;
151 if (cp[0] != 'c' || cp[2] != 'd' ||
152 !isdigit(cp[1]) || !isdigit(cp[3]))
153 goto errout;
154 *(cp+4) = 0;
155 return str;
156 }
157
158 /* Now let's handle /dev/hd* and /dev/sd* devices.... */
159 if ((cp[0] == 'h' || cp[0] == 's') && (cp[1] == 'd')) {
160 cp += 2;
161 /* If there's a single number after /dev/hd, skip it */
162 if (isdigit(*cp))
163 cp++;
164 /* What follows must be an alpha char, or give up */
165 if (!isalpha(*cp))
166 goto errout;
167 *(cp + 1) = 0;
168 return str;
169 }
170
171#ifdef CONFIG_FEATURE_DEVFS
172 /* Now let's handle devfs (ugh) names */
173 len = 0;
174 if (strncmp(cp, "ide/", 4) == 0)
175 len = 4;
176 if (strncmp(cp, "scsi/", 5) == 0)
177 len = 5;
178 if (len) {
179 cp += len;
180 /*
181 * Now we proceed down the expected devfs hierarchy.
182 * i.e., .../host1/bus2/target3/lun4/...
183 * If we don't find the expected token, followed by
184 * some number of digits at each level, abort.
185 */
186 for (hier = devfs_hier; *hier; hier++) {
187 len = strlen(*hier);
188 if (strncmp(cp, *hier, len) != 0)
189 goto errout;
190 cp += len;
191 while (*cp != '/' && *cp != 0) {
192 if (!isdigit(*cp))
193 goto errout;
194 cp++;
195 }
196 cp++;
197 }
198 *(cp - 1) = 0;
199 return str;
200 }
201
202 /* Now handle devfs /dev/disc or /dev/disk names */
203 disk = 0;
204 if (strncmp(cp, "discs/", 6) == 0)
205 disk = "disc";
206 else if (strncmp(cp, "disks/", 6) == 0)
207 disk = "disk";
208 if (disk) {
209 cp += 6;
210 if (strncmp(cp, disk, 4) != 0)
211 goto errout;
212 cp += 4;
213 while (*cp != '/' && *cp != 0) {
214 if (!isdigit(*cp))
215 goto errout;
216 cp++;
217 }
218 *cp = 0;
219 return str;
220 }
221#endif
222
223errout:
224 free(str);
225 return NULL;
226}
227
228
229static const char * const ignored_types[] = {
230 "ignore",
231 "iso9660",
232 "nfs",
233 "proc",
234 "sw",
235 "swap",
236 "tmpfs",
237 "devpts",
238 NULL
239};
240
241static const char * const really_wanted[] = {
242 "minix",
243 "ext2",
244 "ext3",
245 "jfs",
246 "reiserfs",
247 "xiafs",
248 "xfs",
249 NULL
250};
251
252#define BASE_MD "/dev/md"
253
254/*
255 * Global variables for options
256 */
257static char *devices[MAX_DEVICES];
258static char *args[MAX_ARGS];
259static int num_devices, num_args;
260
261static int verbose;
262static int doall;
263static int noexecute;
264static int serialize;
265static int skip_root;
266static int like_mount;
267static int notitle;
268static int parallel_root;
269static int progress;
270static int progress_fd;
271static int force_all_parallel;
272static int num_running;
273static int max_running;
274static volatile int cancel_requested;
275static int kill_sent;
276static char *fstype;
277static struct fs_info *filesys_info, *filesys_last;
278static struct fsck_instance *instance_list;
279static char *fsck_path;
280static blkid_cache cache;
281
282static char *string_copy(const char *s)
283{
284 char *ret;
285
286 if (!s)
287 return 0;
288 ret = strdup(s);
289 return ret;
290}
291
292static int string_to_int(const char *s)
293{
294 long l;
295 char *p;
296
297 l = strtol(s, &p, 0);
298 if (*p || l == LONG_MIN || l == LONG_MAX || l < 0 || l > INT_MAX)
299 return -1;
300 else
301 return (int) l;
302}
303
304static char *skip_over_blank(char *cp)
305{
306 while (*cp && isspace(*cp))
307 cp++;
308 return cp;
309}
310
311static char *skip_over_word(char *cp)
312{
313 while (*cp && !isspace(*cp))
314 cp++;
315 return cp;
316}
317
318static void strip_line(char *line)
319{
320 char *p;
321
322 while (*line) {
323 p = line + strlen(line) - 1;
324 if ((*p == '\n') || (*p == '\r'))
325 *p = 0;
326 else
327 break;
328 }
329}
330
331static char *parse_word(char **buf)
332{
333 char *word, *next;
334
335 word = *buf;
336 if (*word == 0)
337 return 0;
338
339 word = skip_over_blank(word);
340 next = skip_over_word(word);
341 if (*next)
342 *next++ = 0;
343 *buf = next;
344 return word;
345}
346
347static void parse_escape(char *word)
348{
349 char *q, c;
350 const char *p;
351
352 if (!word)
353 return;
354
355 for (p = q = word; *p; q++) {
356 c = *p++;
357 if (c != '\\') {
358 *q = c;
359 } else {
360 *q = bb_process_escape_sequence(&p);
361 }
362 }
363 *q = 0;
364}
365
366static void free_instance(struct fsck_instance *i)
367{
368 if (i->prog)
369 free(i->prog);
370 if (i->device)
371 free(i->device);
372 if (i->base_device)
373 free(i->base_device);
374 free(i);
375 return;
376}
377
378static struct fs_info *create_fs_device(const char *device, const char *mntpnt,
379 const char *type, const char *opts,
380 int freq, int passno)
381{
382 struct fs_info *fs;
383
384 if (!(fs = malloc(sizeof(struct fs_info))))
385 return NULL;
386
387 fs->device = string_copy(device);
388 fs->mountpt = string_copy(mntpnt);
389 fs->type = string_copy(type);
390 fs->opts = string_copy(opts ? opts : "");
391 fs->freq = freq;
392 fs->passno = passno;
393 fs->flags = 0;
394 fs->next = NULL;
395
396 if (!filesys_info)
397 filesys_info = fs;
398 else
399 filesys_last->next = fs;
400 filesys_last = fs;
401
402 return fs;
403}
404
405
406
407static int parse_fstab_line(char *line, struct fs_info **ret_fs)
408{
409 char *dev, *device, *mntpnt, *type, *opts, *freq, *passno, *cp;
410 struct fs_info *fs;
411
412 *ret_fs = 0;
413 strip_line(line);
414 if ((cp = strchr(line, '#')))
415 *cp = 0; /* Ignore everything after the comment char */
416 cp = line;
417
418 device = parse_word(&cp);
419 mntpnt = parse_word(&cp);
420 type = parse_word(&cp);
421 opts = parse_word(&cp);
422 freq = parse_word(&cp);
423 passno = parse_word(&cp);
424
425 if (!device)
426 return 0; /* Allow blank lines */
427
428 if (!mntpnt || !type)
429 return -1;
430
431 parse_escape(device);
432 parse_escape(mntpnt);
433 parse_escape(type);
434 parse_escape(opts);
435 parse_escape(freq);
436 parse_escape(passno);
437
438 dev = blkid_get_devname(cache, device, NULL);
439 if (dev)
440 device = dev;
441
442 if (strchr(type, ','))
443 type = 0;
444
445 fs = create_fs_device(device, mntpnt, type ? type : "auto", opts,
446 freq ? atoi(freq) : -1,
447 passno ? atoi(passno) : -1);
448 if (dev)
449 free(dev);
450
451 if (!fs)
452 return -1;
453 *ret_fs = fs;
454 return 0;
455}
456
457static void interpret_type(struct fs_info *fs)
458{
459 char *t;
460
461 if (strcmp(fs->type, "auto") != 0)
462 return;
463 t = blkid_get_tag_value(cache, "TYPE", fs->device);
464 if (t) {
465 free(fs->type);
466 fs->type = t;
467 }
468}
469
470/*
471 * Load the filesystem database from /etc/fstab
472 */
473static void load_fs_info(const char *filename)
474{
475 FILE *f;
476 char buf[1024];
477 int lineno = 0;
478 int old_fstab = 1;
479 struct fs_info *fs;
480
481 if ((f = fopen(filename, "r")) == NULL) {
482 bb_perror_msg("WARNING: cannot open %s", filename);
483 return;
484 }
485 while (!feof(f)) {
486 lineno++;
487 if (!fgets(buf, sizeof(buf), f))
488 break;
489 buf[sizeof(buf)-1] = 0;
490 if (parse_fstab_line(buf, &fs) < 0) {
491 bb_error_msg("WARNING: bad format "
492 "on line %d of %s\n", lineno, filename);
493 continue;
494 }
495 if (!fs)
496 continue;
497 if (fs->passno < 0)
498 fs->passno = 0;
499 else
500 old_fstab = 0;
501 }
502
503 fclose(f);
504
505 if (old_fstab) {
506 fputs("\007\007\007"
507 "WARNING: Your /etc/fstab does not contain the fsck passno\n"
508 " field. I will kludge around things for you, but you\n"
509 " should fix your /etc/fstab file as soon as you can.\n\n", stderr);
510
511 for (fs = filesys_info; fs; fs = fs->next) {
512 fs->passno = 1;
513 }
514 }
515}
516
517/* Lookup filesys in /etc/fstab and return the corresponding entry. */
518static struct fs_info *lookup(char *filesys)
519{
520 struct fs_info *fs;
521
522 /* No filesys name given. */
523 if (filesys == NULL)
524 return NULL;
525
526 for (fs = filesys_info; fs; fs = fs->next) {
527 if (!strcmp(filesys, fs->device) ||
528 (fs->mountpt && !strcmp(filesys, fs->mountpt)))
529 break;
530 }
531
532 return fs;
533}
534
535/* Find fsck program for a given fs type. */
536static char *find_fsck(char *type)
537{
538 char *s;
539 const char *tpl;
540 char *p = string_copy(fsck_path);
541 struct stat st;
542
543 /* Are we looking for a program or just a type? */
544 tpl = (strncmp(type, "fsck.", 5) ? "%s/fsck.%s" : "%s/%s");
545
546 for(s = strtok(p, ":"); s; s = strtok(NULL, ":")) {
547 s = xasprintf(tpl, s, type);
548 if (stat(s, &st) == 0) break;
549 free(s);
550 }
551 free(p);
552 return s;
553}
554
555static int progress_active(void)
556{
557 struct fsck_instance *inst;
558
559 for (inst = instance_list; inst; inst = inst->next) {
560 if (inst->flags & FLAG_DONE)
561 continue;
562 if (inst->flags & FLAG_PROGRESS)
563 return 1;
564 }
565 return 0;
566}
567
568/*
569 * Execute a particular fsck program, and link it into the list of
570 * child processes we are waiting for.
571 */
572static int execute(const char *type, const char *device, const char *mntpt,
573 int interactive)
574{
575 char *s, *argv[80];
576 char *prog;
577 int argc, i;
578 struct fsck_instance *inst, *p;
579 pid_t pid;
580
581 inst = malloc(sizeof(struct fsck_instance));
582 if (!inst)
583 return ENOMEM;
584 memset(inst, 0, sizeof(struct fsck_instance));
585
586 prog = xasprintf("fsck.%s", type);
587 argv[0] = prog;
588 argc = 1;
589
590 for (i=0; i <num_args; i++)
591 argv[argc++] = string_copy(args[i]);
592
593 if (progress && !progress_active()) {
594 if ((strcmp(type, "ext2") == 0) ||
595 (strcmp(type, "ext3") == 0)) {
596 char tmp[80];
597 snprintf(tmp, 80, "-C%d", progress_fd);
598 argv[argc++] = string_copy(tmp);
599 inst->flags |= FLAG_PROGRESS;
600 }
601 }
602
603 argv[argc++] = string_copy(device);
604 argv[argc] = 0;
605
606 s = find_fsck(prog);
607 if (s == NULL) {
608 bb_error_msg("%s: not found", prog);
609 return ENOENT;
610 }
611
612 if (verbose || noexecute) {
613 printf("[%s (%d) -- %s] ", s, num_running,
614 mntpt ? mntpt : device);
615 for (i=0; i < argc; i++)
616 printf("%s ", argv[i]);
617 puts("");
618 }
619
620 /* Fork and execute the correct program. */
621 if (noexecute)
622 pid = -1;
623 else if ((pid = fork()) < 0) {
624 perror("fork");
625 return errno;
626 } else if (pid == 0) {
627 if (!interactive)
628 close(0);
629 (void) execv(s, argv);
630 bb_perror_msg_and_die("%s", argv[0]);
631 }
632
633 for (i = 1; i < argc; i++)
634 free(argv[i]);
635
636 free(s);
637 inst->pid = pid;
638 inst->prog = prog;
639 inst->type = string_copy(type);
640 inst->device = string_copy(device);
641 inst->base_device = base_device(device);
642 inst->start_time = time(0);
643 inst->next = NULL;
644
645 /*
646 * Find the end of the list, so we add the instance on at the end.
647 */
648 for (p = instance_list; p && p->next; p = p->next);
649
650 if (p)
651 p->next = inst;
652 else
653 instance_list = inst;
654
655 return 0;
656}
657
658/*
659 * Send a signal to all outstanding fsck child processes
660 */
661static int kill_all(int signum)
662{
663 struct fsck_instance *inst;
664 int n = 0;
665
666 for (inst = instance_list; inst; inst = inst->next) {
667 if (inst->flags & FLAG_DONE)
668 continue;
669 kill(inst->pid, signum);
670 n++;
671 }
672 return n;
673}
674
675/*
676 * Wait for one child process to exit; when it does, unlink it from
677 * the list of executing child processes, and return it.
678 */
679static struct fsck_instance *wait_one(int flags)
680{
681 int status;
682 int sig;
683 struct fsck_instance *inst, *inst2, *prev;
684 pid_t pid;
685
686 if (!instance_list)
687 return NULL;
688
689 if (noexecute) {
690 inst = instance_list;
691 prev = 0;
692#ifdef RANDOM_DEBUG
693 while (inst->next && (random() & 1)) {
694 prev = inst;
695 inst = inst->next;
696 }
697#endif
698 inst->exit_status = 0;
699 goto ret_inst;
700 }
701
702 /*
703 * gcc -Wall fails saving throw against stupidity
704 * (inst and prev are thought to be uninitialized variables)
705 */
706 inst = prev = NULL;
707
708 do {
709 pid = waitpid(-1, &status, flags);
710 if (cancel_requested && !kill_sent) {
711 kill_all(SIGTERM);
712 kill_sent++;
713 }
714 if ((pid == 0) && (flags & WNOHANG))
715 return NULL;
716 if (pid < 0) {
717 if ((errno == EINTR) || (errno == EAGAIN))
718 continue;
719 if (errno == ECHILD) {
720 bb_error_msg("wait: no more child process?!?");
721 return NULL;
722 }
723 perror("wait");
724 continue;
725 }
726 for (prev = 0, inst = instance_list;
727 inst;
728 prev = inst, inst = inst->next) {
729 if (inst->pid == pid)
730 break;
731 }
732 } while (!inst);
733
734 if (WIFEXITED(status))
735 status = WEXITSTATUS(status);
736 else if (WIFSIGNALED(status)) {
737 sig = WTERMSIG(status);
738 if (sig == SIGINT) {
739 status = EXIT_UNCORRECTED;
740 } else {
741 printf("Warning... %s for device %s exited "
742 "with signal %d.\n",
743 inst->prog, inst->device, sig);
744 status = EXIT_ERROR;
745 }
746 } else {
747 printf("%s %s: status is %x, should never happen.\n",
748 inst->prog, inst->device, status);
749 status = EXIT_ERROR;
750 }
751 inst->exit_status = status;
752 if (progress && (inst->flags & FLAG_PROGRESS) &&
753 !progress_active()) {
754 for (inst2 = instance_list; inst2; inst2 = inst2->next) {
755 if (inst2->flags & FLAG_DONE)
756 continue;
757 if (strcmp(inst2->type, "ext2") &&
758 strcmp(inst2->type, "ext3"))
759 continue;
760 /*
761 * If we've just started the fsck, wait a tiny
762 * bit before sending the kill, to give it
763 * time to set up the signal handler
764 */
765 if (inst2->start_time < time(0)+2) {
766 if (fork() == 0) {
767 sleep(1);
768 kill(inst2->pid, SIGUSR1);
769 exit(0);
770 }
771 } else
772 kill(inst2->pid, SIGUSR1);
773 inst2->flags |= FLAG_PROGRESS;
774 break;
775 }
776 }
777ret_inst:
778 if (prev)
779 prev->next = inst->next;
780 else
781 instance_list = inst->next;
782 if (verbose > 1)
783 printf("Finished with %s (exit status %d)\n",
784 inst->device, inst->exit_status);
785 num_running--;
786 return inst;
787}
788
789#define FLAG_WAIT_ALL 0
790#define FLAG_WAIT_ATLEAST_ONE 1
791/*
792 * Wait until all executing child processes have exited; return the
793 * logical OR of all of their exit code values.
794 */
795static int wait_many(int flags)
796{
797 struct fsck_instance *inst;
798 int global_status = 0;
799 int wait_flags = 0;
800
801 while ((inst = wait_one(wait_flags))) {
802 global_status |= inst->exit_status;
803 free_instance(inst);
804#ifdef RANDOM_DEBUG
805 if (noexecute && (flags & WNOHANG) && !(random() % 3))
806 break;
807#endif
808 if (flags & FLAG_WAIT_ATLEAST_ONE)
809 wait_flags = WNOHANG;
810 }
811 return global_status;
812}
813
814/*
815 * Run the fsck program on a particular device
816 *
817 * If the type is specified using -t, and it isn't prefixed with "no"
818 * (as in "noext2") and only one filesystem type is specified, then
819 * use that type regardless of what is specified in /etc/fstab.
820 *
821 * If the type isn't specified by the user, then use either the type
822 * specified in /etc/fstab, or DEFAULT_FSTYPE.
823 */
824static void fsck_device(struct fs_info *fs, int interactive)
825{
826 const char *type;
827 int retval;
828
829 interpret_type(fs);
830
831 if (strcmp(fs->type, "auto") != 0)
832 type = fs->type;
833 else if (fstype && strncmp(fstype, "no", 2) &&
834 strncmp(fstype, "opts=", 5) && strncmp(fstype, "loop", 4) &&
835 !strchr(fstype, ','))
836 type = fstype;
837 else
838 type = DEFAULT_FSTYPE;
839
840 num_running++;
841 retval = execute(type, fs->device, fs->mountpt, interactive);
842 if (retval) {
843 bb_error_msg("error %d while executing fsck.%s for %s",
844 retval, type, fs->device);
845 num_running--;
846 }
847}
848
849
850/*
851 * Deal with the fsck -t argument.
852 */
853struct fs_type_compile {
854 char **list;
855 int *type;
856 int negate;
857} fs_type_compiled;
858
859#define FS_TYPE_NORMAL 0
860#define FS_TYPE_OPT 1
861#define FS_TYPE_NEGOPT 2
862
863static const char fs_type_syntax_error[] =
864"Either all or none of the filesystem types passed to -t must be prefixed\n"
865 "with 'no' or '!'.";
866
867static void compile_fs_type(char *fs_type, struct fs_type_compile *cmp)
868{
869 char *cp, *list, *s;
870 int num = 2;
871 int negate, first_negate = 1;
872
873 if (fs_type) {
874 for (cp=fs_type; *cp; cp++) {
875 if (*cp == ',')
876 num++;
877 }
878 }
879
880 cmp->list = xzalloc(num * sizeof(char *));
881 cmp->type = xzalloc(num * sizeof(int));
882 cmp->negate = 0;
883
884 if (!fs_type)
885 return;
886
887 list = string_copy(fs_type);
888 num = 0;
889 s = strtok(list, ",");
890 while(s) {
891 negate = 0;
892 if (strncmp(s, "no", 2) == 0) {
893 s += 2;
894 negate = 1;
895 } else if (*s == '!') {
896 s++;
897 negate = 1;
898 }
899 if (strcmp(s, "loop") == 0)
900 /* loop is really short-hand for opts=loop */
901 goto loop_special_case;
902 else if (strncmp(s, "opts=", 5) == 0) {
903 s += 5;
904 loop_special_case:
905 cmp->type[num] = negate ? FS_TYPE_NEGOPT : FS_TYPE_OPT;
906 } else {
907 if (first_negate) {
908 cmp->negate = negate;
909 first_negate = 0;
910 }
911 if ((negate && !cmp->negate) ||
912 (!negate && cmp->negate)) {
913 bb_error_msg_and_die("%s", fs_type_syntax_error);
914 }
915 }
916 cmp->list[num++] = string_copy(s);
917 s = strtok(NULL, ",");
918 }
919 free(list);
920}
921
922/*
923 * This function returns true if a particular option appears in a
924 * comma-delimited options list
925 */
926static int opt_in_list(char *opt, char *optlist)
927{
928 char *list, *s;
929
930 if (!optlist)
931 return 0;
932 list = string_copy(optlist);
933
934 s = strtok(list, ",");
935 while(s) {
936 if (strcmp(s, opt) == 0) {
937 free(list);
938 return 1;
939 }
940 s = strtok(NULL, ",");
941 }
942 free(list);
943 return 0;
944}
945
946/* See if the filesystem matches the criteria given by the -t option */
947static int fs_match(struct fs_info *fs, struct fs_type_compile *cmp)
948{
949 int n, ret = 0, checked_type = 0;
950 char *cp;
951
952 if (cmp->list == 0 || cmp->list[0] == 0)
953 return 1;
954
955 for (n=0; (cp = cmp->list[n]); n++) {
956 switch (cmp->type[n]) {
957 case FS_TYPE_NORMAL:
958 checked_type++;
959 if (strcmp(cp, fs->type) == 0) {
960 ret = 1;
961 }
962 break;
963 case FS_TYPE_NEGOPT:
964 if (opt_in_list(cp, fs->opts))
965 return 0;
966 break;
967 case FS_TYPE_OPT:
968 if (!opt_in_list(cp, fs->opts))
969 return 0;
970 break;
971 }
972 }
973 if (checked_type == 0)
974 return 1;
975 return (cmp->negate ? !ret : ret);
976}
977
978/* Check if we should ignore this filesystem. */
979static int ignore(struct fs_info *fs)
980{
981 int wanted;
982 char *s;
983
984 /*
985 * If the pass number is 0, ignore it.
986 */
987 if (fs->passno == 0)
988 return 1;
989
990 interpret_type(fs);
991
992 /*
993 * If a specific fstype is specified, and it doesn't match,
994 * ignore it.
995 */
996 if (!fs_match(fs, &fs_type_compiled)) return 1;
997
998 /* Are we ignoring this type? */
999 if (index_in_str_array(ignored_types, fs->type) >= 0)
1000 return 1;
1001
1002 /* Do we really really want to check this fs? */
1003 wanted = index_in_str_array(really_wanted, fs->type) >= 0;
1004
1005 /* See if the <fsck.fs> program is available. */
1006 s = find_fsck(fs->type);
1007 if (s == NULL) {
1008 if (wanted)
1009 bb_error_msg("cannot check %s: fsck.%s not found",
1010 fs->device, fs->type);
1011 return 1;
1012 }
1013 free(s);
1014
1015 /* We can and want to check this file system type. */
1016 return 0;
1017}
1018
1019/*
1020 * Returns TRUE if a partition on the same disk is already being
1021 * checked.
1022 */
1023static int device_already_active(char *device)
1024{
1025 struct fsck_instance *inst;
1026 char *base;
1027
1028 if (force_all_parallel)
1029 return 0;
1030
1031#ifdef BASE_MD
1032 /* Don't check a soft raid disk with any other disk */
1033 if (instance_list &&
1034 (!strncmp(instance_list->device, BASE_MD, sizeof(BASE_MD)-1) ||
1035 !strncmp(device, BASE_MD, sizeof(BASE_MD)-1)))
1036 return 1;
1037#endif
1038
1039 base = base_device(device);
1040 /*
1041 * If we don't know the base device, assume that the device is
1042 * already active if there are any fsck instances running.
1043 */
1044 if (!base)
1045 return (instance_list != 0);
1046 for (inst = instance_list; inst; inst = inst->next) {
1047 if (!inst->base_device || !strcmp(base, inst->base_device)) {
1048 free(base);
1049 return 1;
1050 }
1051 }
1052 free(base);
1053 return 0;
1054}
1055
1056/* Check all file systems, using the /etc/fstab table. */
1057static int check_all(void)
1058{
1059 struct fs_info *fs = NULL;
1060 int status = EXIT_OK;
1061 int not_done_yet = 1;
1062 int passno = 1;
1063 int pass_done;
1064
1065 if (verbose)
1066 fputs("Checking all file systems.\n", stdout);
1067
1068 /*
1069 * Do an initial scan over the filesystem; mark filesystems
1070 * which should be ignored as done, and resolve any "auto"
1071 * filesystem types (done as a side-effect of calling ignore()).
1072 */
1073 for (fs = filesys_info; fs; fs = fs->next) {
1074 if (ignore(fs))
1075 fs->flags |= FLAG_DONE;
1076 }
1077
1078 /*
1079 * Find and check the root filesystem.
1080 */
1081 if (!parallel_root) {
1082 for (fs = filesys_info; fs; fs = fs->next) {
1083 if (LONE_CHAR(fs->mountpt, '/'))
1084 break;
1085 }
1086 if (fs) {
1087 if (!skip_root && !ignore(fs)) {
1088 fsck_device(fs, 1);
1089 status |= wait_many(FLAG_WAIT_ALL);
1090 if (status > EXIT_NONDESTRUCT)
1091 return status;
1092 }
1093 fs->flags |= FLAG_DONE;
1094 }
1095 }
1096 /*
1097 * This is for the bone-headed user who enters the root
1098 * filesystem twice. Skip root will skep all root entries.
1099 */
1100 if (skip_root)
1101 for (fs = filesys_info; fs; fs = fs->next)
1102 if (LONE_CHAR(fs->mountpt, '/'))
1103 fs->flags |= FLAG_DONE;
1104
1105 while (not_done_yet) {
1106 not_done_yet = 0;
1107 pass_done = 1;
1108
1109 for (fs = filesys_info; fs; fs = fs->next) {
1110 if (cancel_requested)
1111 break;
1112 if (fs->flags & FLAG_DONE)
1113 continue;
1114 /*
1115 * If the filesystem's pass number is higher
1116 * than the current pass number, then we don't
1117 * do it yet.
1118 */
1119 if (fs->passno > passno) {
1120 not_done_yet++;
1121 continue;
1122 }
1123 /*
1124 * If a filesystem on a particular device has
1125 * already been spawned, then we need to defer
1126 * this to another pass.
1127 */
1128 if (device_already_active(fs->device)) {
1129 pass_done = 0;
1130 continue;
1131 }
1132 /*
1133 * Spawn off the fsck process
1134 */
1135 fsck_device(fs, serialize);
1136 fs->flags |= FLAG_DONE;
1137
1138 /*
1139 * Only do one filesystem at a time, or if we
1140 * have a limit on the number of fsck's extant
1141 * at one time, apply that limit.
1142 */
1143 if (serialize ||
1144 (max_running && (num_running >= max_running))) {
1145 pass_done = 0;
1146 break;
1147 }
1148 }
1149 if (cancel_requested)
1150 break;
1151 if (verbose > 1)
1152 printf("--waiting-- (pass %d)\n", passno);
1153 status |= wait_many(pass_done ? FLAG_WAIT_ALL :
1154 FLAG_WAIT_ATLEAST_ONE);
1155 if (pass_done) {
1156 if (verbose > 1)
1157 printf("----------------------------------\n");
1158 passno++;
1159 } else
1160 not_done_yet++;
1161 }
1162 if (cancel_requested && !kill_sent) {
1163 kill_all(SIGTERM);
1164 kill_sent++;
1165 }
1166 status |= wait_many(FLAG_WAIT_ATLEAST_ONE);
1167 return status;
1168}
1169
1170static void signal_cancel(int sig FSCK_ATTR((unused)))
1171{
1172 cancel_requested++;
1173}
1174
1175static void PRS(int argc, char *argv[])
1176{
1177 int i, j;
1178 char *arg, *dev, *tmp = 0;
1179 char options[128];
1180 int opt = 0;
1181 int opts_for_fsck = 0;
1182 struct sigaction sa;
1183
1184 /*
1185 * Set up signal action
1186 */
1187 memset(&sa, 0, sizeof(struct sigaction));
1188 sa.sa_handler = signal_cancel;
1189 sigaction(SIGINT, &sa, 0);
1190 sigaction(SIGTERM, &sa, 0);
1191
1192 num_devices = 0;
1193 num_args = 0;
1194 instance_list = 0;
1195
1196 for (i=1; i < argc; i++) {
1197 arg = argv[i];
1198 if (!arg)
1199 continue;
1200 if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) {
1201 if (num_devices >= MAX_DEVICES) {
1202 bb_error_msg_and_die("too many devices");
1203 }
1204 dev = blkid_get_devname(cache, arg, NULL);
1205 if (!dev && strchr(arg, '=')) {
1206 /*
1207 * Check to see if we failed because
1208 * /proc/partitions isn't found.
1209 */
1210 if (access("/proc/partitions", R_OK) < 0) {
1211 bb_perror_msg_and_die("cannot open /proc/partitions "
1212 "(is /proc mounted?)");
1213 }
1214 /*
1215 * Check to see if this is because
1216 * we're not running as root
1217 */
1218 if (geteuid())
1219 bb_error_msg_and_die(
1220 "must be root to scan for matching filesystems: %s\n", arg);
1221 else
1222 bb_error_msg_and_die(
1223 "cannot find matching filesystem: %s", arg);
1224 }
1225 devices[num_devices++] = dev ? dev : string_copy(arg);
1226 continue;
1227 }
1228 if (arg[0] != '-' || opts_for_fsck) {
1229 if (num_args >= MAX_ARGS) {
1230 bb_error_msg_and_die("too many arguments");
1231 }
1232 args[num_args++] = string_copy(arg);
1233 continue;
1234 }
1235 for (j=1; arg[j]; j++) {
1236 if (opts_for_fsck) {
1237 options[++opt] = arg[j];
1238 continue;
1239 }
1240 switch (arg[j]) {
1241 case 'A':
1242 doall++;
1243 break;
1244 case 'C':
1245 progress++;
1246 if (arg[j+1]) {
1247 progress_fd = string_to_int(arg+j+1);
1248 if (progress_fd < 0)
1249 progress_fd = 0;
1250 else
1251 goto next_arg;
1252 } else if ((i+1) < argc
1253 && argv[i+1][0] != '-') {
1254 progress_fd = string_to_int(argv[i]);
1255 if (progress_fd < 0)
1256 progress_fd = 0;
1257 else {
1258 goto next_arg;
1259 i++;
1260 }
1261 }
1262 break;
1263 case 'V':
1264 verbose++;
1265 break;
1266 case 'N':
1267 noexecute++;
1268 break;
1269 case 'R':
1270 skip_root++;
1271 break;
1272 case 'T':
1273 notitle++;
1274 break;
1275 case 'M':
1276 like_mount++;
1277 break;
1278 case 'P':
1279 parallel_root++;
1280 break;
1281 case 's':
1282 serialize++;
1283 break;
1284 case 't':
1285 tmp = 0;
1286 if (fstype)
1287 bb_show_usage();
1288 if (arg[j+1])
1289 tmp = arg+j+1;
1290 else if ((i+1) < argc)
1291 tmp = argv[++i];
1292 else
1293 bb_show_usage();
1294 fstype = string_copy(tmp);
1295 compile_fs_type(fstype, &fs_type_compiled);
1296 goto next_arg;
1297 case '-':
1298 opts_for_fsck++;
1299 break;
1300 case '?':
1301 bb_show_usage();
1302 break;
1303 default:
1304 options[++opt] = arg[j];
1305 break;
1306 }
1307 }
1308 next_arg:
1309 if (opt) {
1310 options[0] = '-';
1311 options[++opt] = '\0';
1312 if (num_args >= MAX_ARGS) {
1313 bb_error_msg("too many arguments");
1314 }
1315 args[num_args++] = string_copy(options);
1316 opt = 0;
1317 }
1318 }
1319 if (getenv("FSCK_FORCE_ALL_PARALLEL"))
1320 force_all_parallel++;
1321 if ((tmp = getenv("FSCK_MAX_INST")))
1322 max_running = atoi(tmp);
1323}
1324
1325int fsck_main(int argc, char *argv[])
1326{
1327 int i, status = 0;
1328 int interactive = 0;
1329 const char *fstab;
1330 struct fs_info *fs;
1331
1332 setvbuf(stdout, NULL, _IONBF, BUFSIZ);
1333 setvbuf(stderr, NULL, _IONBF, BUFSIZ);
1334
1335 blkid_get_cache(&cache, NULL);
1336 PRS(argc, argv);
1337
1338 if (!notitle)
1339 printf("fsck %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1340
1341 fstab = getenv("FSTAB_FILE");
1342 if (!fstab)
1343 fstab = _PATH_MNTTAB;
1344 load_fs_info(fstab);
1345
1346 fsck_path = e2fs_set_sbin_path();
1347
1348 if ((num_devices == 1) || (serialize))
1349 interactive = 1;
1350
1351 /* If -A was specified ("check all"), do that! */
1352 if (doall)
1353 return check_all();
1354
1355 if (num_devices == 0) {
1356 serialize++;
1357 interactive++;
1358 return check_all();
1359 }
1360 for (i = 0 ; i < num_devices; i++) {
1361 if (cancel_requested) {
1362 if (!kill_sent) {
1363 kill_all(SIGTERM);
1364 kill_sent++;
1365 }
1366 break;
1367 }
1368 fs = lookup(devices[i]);
1369 if (!fs) {
1370 fs = create_fs_device(devices[i], 0, "auto",
1371 0, -1, -1);
1372 if (!fs)
1373 continue;
1374 }
1375 fsck_device(fs, interactive);
1376 if (serialize ||
1377 (max_running && (num_running >= max_running))) {
1378 struct fsck_instance *inst;
1379
1380 inst = wait_one(0);
1381 if (inst) {
1382 status |= inst->exit_status;
1383 free_instance(inst);
1384 }
1385 if (verbose > 1)
1386 printf("----------------------------------\n");
1387 }
1388 }
1389 status |= wait_many(FLAG_WAIT_ALL);
1390 blkid_put_cache(cache);
1391 return status;
1392}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-14 08:55:28 +0000