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, <[email protected]>
10 *
11 * Miquel van Smoorenburg ([email protected]) 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 #define _XOPEN_SOURCE 600 /* for inclusion of sa_handler in Solaris */
29
30 #include "config.h"
31 #include <sys/types.h>
32 #include <sys/wait.h>
33 #include <sys/stat.h>
34 #include <limits.h>
35 #include <stdio.h>
36 #include <ctype.h>
37 #include <string.h>
38 #include <time.h>
39 #if HAVE_STDLIB_H
40 #include <stdlib.h>
41 #endif
42 #if HAVE_ERRNO_H
43 #include <errno.h>
44 #endif
45 #if HAVE_PATHS_H
46 #include <paths.h>
47 #endif
48 #if HAVE_UNISTD_H
49 #include <unistd.h>
50 #endif
51 #if HAVE_ERRNO_H
52 #include <errno.h>
53 #endif
54 #if HAVE_MALLOC_H
55 #include <malloc.h>
56 #endif
57 #ifdef HAVE_SIGNAL_H
58 #include <signal.h>
59 #endif
60
61 #include "../version.h"
62 #include "support/devname.h"
63 #include "support/nls-enable.h"
64 #include "fsck.h"
65 #include "blkid/blkid.h"
66
67 #ifndef _PATH_MNTTAB
68 #define _PATH_MNTTAB "/etc/fstab"
69 #endif
70
71 static const char *ignored_types[] = {
72 "ignore",
73 "iso9660",
74 "nfs",
75 "proc",
76 "sw",
77 "swap",
78 "tmpfs",
79 "devpts",
80 NULL
81 };
82
83 static const char *really_wanted[] = {
84 "minix",
85 "ext2",
86 "ext3",
87 "ext4",
88 "ext4dev",
89 "jfs",
90 "reiserfs",
91 "xiafs",
92 "xfs",
93 NULL
94 };
95
96 #define BASE_MD "/dev/md"
97
98 /*
99 * Global variables for options
100 */
101 static char *devices[MAX_DEVICES];
102 static char *args[MAX_ARGS];
103 static int num_devices, num_args;
104
105 static int verbose = 0;
106 static int doall = 0;
107 static int noexecute = 0;
108 static int serialize = 0;
109 static int skip_root = 0;
110 static int ignore_mounted = 0;
111 static int notitle = 0;
112 static int parallel_root = 0;
113 static int progress = 0;
114 static int progress_fd = 0;
115 static int force_all_parallel = 0;
116 static int num_running = 0;
117 static int max_running = 0;
118 static volatile int cancel_requested = 0;
119 static int kill_sent = 0;
120 static char *progname;
121 static char *fstype = NULL;
122 static struct fs_info *filesys_info = NULL, *filesys_last = NULL;
123 static struct fsck_instance *instance_list;
124 static const char *fsck_prefix_path = "/sbin:/sbin/fs.d:/sbin/fs:/etc/fs:/etc";
125 static char *fsck_path = 0;
126 static blkid_cache cache = NULL;
127
string_copy(const char * s)128 static char *string_copy(const char *s)
129 {
130 char *ret;
131
132 if (!s)
133 return 0;
134 ret = malloc(strlen(s)+1);
135 if (ret)
136 strcpy(ret, s);
137 return ret;
138 }
139
string_to_int(const char * s)140 static int string_to_int(const char *s)
141 {
142 long l;
143 char *p;
144
145 l = strtol(s, &p, 0);
146 if (*p || l == LONG_MIN || l == LONG_MAX || l < 0 || l > INT_MAX)
147 return -1;
148 else
149 return (int) l;
150 }
151
152 static int ignore(struct fs_info *);
153
skip_over_blank(char * cp)154 static char *skip_over_blank(char *cp)
155 {
156 while (*cp && isspace(*cp))
157 cp++;
158 return cp;
159 }
160
skip_over_word(char * cp)161 static char *skip_over_word(char *cp)
162 {
163 while (*cp && !isspace(*cp))
164 cp++;
165 return cp;
166 }
167
strip_line(char * line)168 static void strip_line(char *line)
169 {
170 char *p;
171
172 while (*line) {
173 p = line + strlen(line) - 1;
174 if ((*p == '\n') || (*p == '\r'))
175 *p = 0;
176 else
177 break;
178 }
179 }
180
parse_word(char ** buf)181 static char *parse_word(char **buf)
182 {
183 char *word, *next;
184
185 word = *buf;
186 if (*word == 0)
187 return 0;
188
189 word = skip_over_blank(word);
190 next = skip_over_word(word);
191 if (*next)
192 *next++ = 0;
193 *buf = next;
194 return word;
195 }
196
parse_escape(char * word)197 static void parse_escape(char *word)
198 {
199 char *p, *q;
200 int ac, i;
201
202 if (!word)
203 return;
204
205 for (p = word, q = word; *p; p++, q++) {
206 *q = *p;
207 if (*p != '\\')
208 continue;
209 if (*++p == 0)
210 break;
211 if (*p == 't') {
212 *q = '\t';
213 continue;
214 }
215 if (*p == 'n') {
216 *q = '\n';
217 continue;
218 }
219 if (!isdigit(*p)) {
220 *q = *p;
221 continue;
222 }
223 ac = 0;
224 for (i = 0; i < 3; i++, p++) {
225 if (!isdigit(*p))
226 break;
227 ac = (ac * 8) + (*p - '0');
228 }
229 *q = ac;
230 p--;
231 }
232 *q = 0;
233 }
234
free_instance(struct fsck_instance * i)235 static void free_instance(struct fsck_instance *i)
236 {
237 free(i->prog);
238 free(i->device);
239 free(i->base_device);
240 free(i);
241 return;
242 }
243
create_fs_device(const char * device,const char * mntpnt,const char * type,const char * opts,int freq,int passno)244 static struct fs_info *create_fs_device(const char *device, const char *mntpnt,
245 const char *type, const char *opts,
246 int freq, int passno)
247 {
248 struct fs_info *fs;
249
250 if (!(fs = malloc(sizeof(struct fs_info))))
251 return NULL;
252
253 fs->device = string_copy(device);
254 fs->mountpt = string_copy(mntpnt);
255 fs->type = string_copy(type);
256 fs->opts = string_copy(opts ? opts : "");
257 fs->freq = freq;
258 fs->passno = passno;
259 fs->flags = 0;
260 fs->next = NULL;
261
262 if (!filesys_info)
263 filesys_info = fs;
264 else
265 filesys_last->next = fs;
266 filesys_last = fs;
267
268 return fs;
269 }
270
271
272
parse_fstab_line(char * line,struct fs_info ** ret_fs)273 static int parse_fstab_line(char *line, struct fs_info **ret_fs)
274 {
275 char *dev, *device, *mntpnt, *type, *opts, *freq, *passno, *cp;
276 struct fs_info *fs;
277
278 *ret_fs = 0;
279 strip_line(line);
280 cp = line;
281
282 device = parse_word(&cp);
283 if (!device || *device == '#')
284 return 0; /* Ignore blank lines and comments */
285 mntpnt = parse_word(&cp);
286 type = parse_word(&cp);
287 opts = parse_word(&cp);
288 freq = parse_word(&cp);
289 passno = parse_word(&cp);
290
291 if (!mntpnt || !type)
292 return -1;
293
294 parse_escape(device);
295 parse_escape(mntpnt);
296 parse_escape(type);
297 parse_escape(opts);
298 parse_escape(freq);
299 parse_escape(passno);
300
301 dev = get_devname(cache, device, NULL);
302 if (dev)
303 device = dev;
304
305 if (strchr(type, ','))
306 type = 0;
307
308 fs = create_fs_device(device, mntpnt, type ? type : "auto", opts,
309 freq ? atoi(freq) : -1,
310 passno ? atoi(passno) : -1);
311 free(dev);
312
313 if (!fs)
314 return -1;
315 *ret_fs = fs;
316 return 0;
317 }
318
interpret_type(struct fs_info * fs)319 static void interpret_type(struct fs_info *fs)
320 {
321 char *t;
322
323 if (strcmp(fs->type, "auto") != 0)
324 return;
325 t = blkid_get_tag_value(cache, "TYPE", fs->device);
326 if (t) {
327 free(fs->type);
328 fs->type = t;
329 }
330 }
331
332 /*
333 * Load the filesystem database from /etc/fstab
334 */
load_fs_info(const char * filename)335 static void load_fs_info(const char *filename)
336 {
337 FILE *f;
338 char buf[1024];
339 int lineno = 0;
340 int old_fstab = 1;
341 struct fs_info *fs;
342
343 if ((f = fopen(filename, "r")) == NULL) {
344 fprintf(stderr, _("WARNING: couldn't open %s: %s\n"),
345 filename, strerror(errno));
346 return;
347 }
348 while (!feof(f)) {
349 lineno++;
350 if (!fgets(buf, sizeof(buf), f))
351 break;
352 buf[sizeof(buf)-1] = 0;
353 if (parse_fstab_line(buf, &fs) < 0) {
354 fprintf(stderr, _("WARNING: bad format "
355 "on line %d of %s\n"), lineno, filename);
356 continue;
357 }
358 if (!fs)
359 continue;
360 if (fs->passno < 0)
361 fs->passno = 0;
362 else
363 old_fstab = 0;
364 }
365
366 fclose(f);
367
368 if (old_fstab && filesys_info) {
369 fputs("\007\007\007", stderr);
370 fputs(_(
371 "WARNING: Your /etc/fstab does not contain the fsck passno\n"
372 " field. I will kludge around things for you, but you\n"
373 " should fix your /etc/fstab file as soon as you can.\n\n"), stderr);
374
375 for (fs = filesys_info; fs; fs = fs->next) {
376 fs->passno = 1;
377 }
378 }
379 }
380
381 /* Lookup filesys in /etc/fstab and return the corresponding entry. */
lookup(char * filesys)382 static struct fs_info *lookup(char *filesys)
383 {
384 struct fs_info *fs;
385
386 /* No filesys name given. */
387 if (filesys == NULL)
388 return NULL;
389
390 for (fs = filesys_info; fs; fs = fs->next) {
391 if (!strcmp(filesys, fs->device) ||
392 (fs->mountpt && !strcmp(filesys, fs->mountpt)))
393 break;
394 }
395
396 return fs;
397 }
398
399 /* Find fsck program for a given fs type. */
find_fsck(char * type)400 static char *find_fsck(char *type)
401 {
402 char *s;
403 const char *tpl;
404 static char prog[256];
405 char *p = string_copy(fsck_path);
406 struct stat st;
407
408 /* Are we looking for a program or just a type? */
409 tpl = (strncmp(type, "fsck.", 5) ? "%s/fsck.%s" : "%s/%s");
410
411 for(s = strtok(p, ":"); s; s = strtok(NULL, ":")) {
412 int len = snprintf(prog, sizeof(prog), tpl, s, type);
413
414 if ((len < 0) || (len >= (int) sizeof(prog)))
415 continue;
416 if (stat(prog, &st) == 0)
417 break;
418 }
419 free(p);
420 return(s ? prog : NULL);
421 }
422
progress_active(NOARGS)423 static int progress_active(NOARGS)
424 {
425 struct fsck_instance *inst;
426
427 for (inst = instance_list; inst; inst = inst->next) {
428 if (inst->flags & FLAG_DONE)
429 continue;
430 if (inst->flags & FLAG_PROGRESS)
431 return 1;
432 }
433 return 0;
434 }
435
436 /*
437 * Execute a particular fsck program, and link it into the list of
438 * child processes we are waiting for.
439 */
execute(const char * type,const char * device,const char * mntpt,int interactive)440 static int execute(const char *type, const char *device, const char *mntpt,
441 int interactive)
442 {
443 char *s, *argv[80], prog[256];
444 int argc, i, len;
445 struct fsck_instance *inst, *p;
446 pid_t pid;
447
448 len = snprintf(prog, sizeof(prog), "fsck.%s", type);
449 if ((len < 0) || (len >= (int) sizeof(prog)))
450 return EINVAL;
451
452 inst = malloc(sizeof(struct fsck_instance));
453 if (!inst)
454 return ENOMEM;
455 memset(inst, 0, sizeof(struct fsck_instance));
456
457 argv[0] = string_copy(prog);
458 argc = 1;
459
460 for (i=0; i <num_args; i++)
461 argv[argc++] = string_copy(args[i]);
462
463 if (progress) {
464 if ((strcmp(type, "ext2") == 0) ||
465 (strcmp(type, "ext3") == 0) ||
466 (strcmp(type, "ext4") == 0) ||
467 (strcmp(type, "ext4dev") == 0)) {
468 char tmp[80];
469
470 tmp[0] = 0;
471 if (!progress_active()) {
472 snprintf(tmp, 80, "-C%d", progress_fd);
473 inst->flags |= FLAG_PROGRESS;
474 } else if (progress_fd)
475 snprintf(tmp, 80, "-C%d", progress_fd * -1);
476 if (tmp[0])
477 argv[argc++] = string_copy(tmp);
478 }
479 }
480
481 argv[argc++] = string_copy(device);
482 argv[argc] = 0;
483
484 s = find_fsck(prog);
485 if (s == NULL) {
486 fprintf(stderr, _("fsck: %s: not found\n"), prog);
487 free(inst);
488 return ENOENT;
489 }
490
491 if (verbose || noexecute) {
492 printf("[%s (%d) -- %s] ", s, num_running,
493 mntpt ? mntpt : device);
494 for (i=0; i < argc; i++)
495 printf("%s ", argv[i]);
496 printf("\n");
497 }
498
499 /* Fork and execute the correct program. */
500 if (noexecute)
501 pid = -1;
502 else if ((pid = fork()) < 0) {
503 perror("fork");
504 free(inst);
505 return errno;
506 } else if (pid == 0) {
507 if (!interactive)
508 close(0);
509 (void) execv(s, argv);
510 perror(argv[0]);
511 free(inst);
512 exit(EXIT_ERROR);
513 }
514
515 for (i=0; i < argc; i++)
516 free(argv[i]);
517
518 inst->pid = pid;
519 inst->prog = string_copy(prog);
520 inst->type = string_copy(type);
521 inst->device = string_copy(device);
522 inst->base_device = base_device(device);
523 inst->start_time = time(0);
524 inst->next = NULL;
525
526 /*
527 * Find the end of the list, so we add the instance on at the end.
528 */
529 for (p = instance_list; p && p->next; p = p->next);
530
531 if (p)
532 p->next = inst;
533 else
534 instance_list = inst;
535
536 return 0;
537 }
538
539 /*
540 * Send a signal to all outstanding fsck child processes
541 */
kill_all(int signum)542 static int kill_all(int signum)
543 {
544 struct fsck_instance *inst;
545 int n = 0;
546
547 for (inst = instance_list; inst; inst = inst->next) {
548 if (inst->flags & FLAG_DONE)
549 continue;
550 if (inst->pid <= 0)
551 continue;
552 kill(inst->pid, signum);
553 n++;
554 }
555 return n;
556 }
557
558 /*
559 * Wait for one child process to exit; when it does, unlink it from
560 * the list of executing child processes, and return it.
561 */
wait_one(int flags)562 static struct fsck_instance *wait_one(int flags)
563 {
564 int status;
565 int sig;
566 struct fsck_instance *inst, *inst2, *prev;
567 pid_t pid;
568
569 if (!instance_list)
570 return NULL;
571
572 if (noexecute) {
573 inst = instance_list;
574 prev = 0;
575 #ifdef RANDOM_DEBUG
576 while (inst->next && (random() & 1)) {
577 prev = inst;
578 inst = inst->next;
579 }
580 #endif
581 inst->exit_status = 0;
582 goto ret_inst;
583 }
584
585 /*
586 * gcc -Wall fails saving throw against stupidity
587 * (inst and prev are thought to be uninitialized variables)
588 */
589 inst = prev = NULL;
590
591 do {
592 pid = waitpid(-1, &status, flags);
593 if (cancel_requested && !kill_sent) {
594 kill_all(SIGTERM);
595 kill_sent++;
596 }
597 if ((pid == 0) && (flags & WNOHANG))
598 return NULL;
599 if (pid < 0) {
600 if ((errno == EINTR) || (errno == EAGAIN))
601 continue;
602 if (errno == ECHILD) {
603 fprintf(stderr,
604 _("%s: wait: No more child process?!?\n"),
605 progname);
606 return NULL;
607 }
608 perror("wait");
609 continue;
610 }
611 for (prev = 0, inst = instance_list;
612 inst;
613 prev = inst, inst = inst->next) {
614 if (inst->pid == pid)
615 break;
616 }
617 } while (!inst);
618
619 if (WIFEXITED(status))
620 status = WEXITSTATUS(status);
621 else if (WIFSIGNALED(status)) {
622 sig = WTERMSIG(status);
623 if (sig == SIGINT) {
624 status = EXIT_UNCORRECTED;
625 } else {
626 printf(_("Warning... %s for device %s exited "
627 "with signal %d.\n"),
628 inst->prog, inst->device, sig);
629 status = EXIT_ERROR;
630 }
631 } else {
632 printf(_("%s %s: status is %x, should never happen.\n"),
633 inst->prog, inst->device, status);
634 status = EXIT_ERROR;
635 }
636 inst->exit_status = status;
637 inst->flags |= FLAG_DONE;
638 if (progress && (inst->flags & FLAG_PROGRESS) &&
639 !progress_active()) {
640 for (inst2 = instance_list; inst2; inst2 = inst2->next) {
641 if (inst2->flags & FLAG_DONE)
642 continue;
643 if (strcmp(inst2->type, "ext2") &&
644 strcmp(inst2->type, "ext3") &&
645 strcmp(inst2->type, "ext4") &&
646 strcmp(inst2->type, "ext4dev"))
647 continue;
648 /*
649 * If we've just started the fsck, wait a tiny
650 * bit before sending the kill, to give it
651 * time to set up the signal handler
652 */
653 if (inst2->start_time < time(0)+2) {
654 if (fork() == 0) {
655 sleep(1);
656 kill(inst2->pid, SIGUSR1);
657 exit(0);
658 }
659 } else
660 kill(inst2->pid, SIGUSR1);
661 inst2->flags |= FLAG_PROGRESS;
662 break;
663 }
664 }
665 ret_inst:
666 if (prev)
667 prev->next = inst->next;
668 else
669 instance_list = inst->next;
670 if (verbose > 1)
671 printf(_("Finished with %s (exit status %d)\n"),
672 inst->device, inst->exit_status);
673 num_running--;
674 return inst;
675 }
676
677 #define FLAG_WAIT_ALL 0
678 #define FLAG_WAIT_ATLEAST_ONE 1
679 /*
680 * Wait until all executing child processes have exited; return the
681 * logical OR of all of their exit code values.
682 */
wait_many(int flags)683 static int wait_many(int flags)
684 {
685 struct fsck_instance *inst;
686 int global_status = 0;
687 int wait_flags = 0;
688
689 while ((inst = wait_one(wait_flags))) {
690 global_status |= inst->exit_status;
691 free_instance(inst);
692 #ifdef RANDOM_DEBUG
693 if (noexecute && (flags & WNOHANG) && !(random() % 3))
694 break;
695 #endif
696 if (flags & FLAG_WAIT_ATLEAST_ONE)
697 wait_flags = WNOHANG;
698 }
699 return global_status;
700 }
701
702 /*
703 * Run the fsck program on a particular device
704 *
705 * If the type is specified using -t, and it isn't prefixed with "no"
706 * (as in "noext2") and only one filesystem type is specified, then
707 * use that type regardless of what is specified in /etc/fstab.
708 *
709 * If the type isn't specified by the user, then use either the type
710 * specified in /etc/fstab, or DEFAULT_FSTYPE.
711 */
fsck_device(struct fs_info * fs,int interactive)712 static void fsck_device(struct fs_info *fs, int interactive)
713 {
714 const char *type;
715 int retval;
716
717 interpret_type(fs);
718
719 if (strcmp(fs->type, "auto") != 0)
720 type = fs->type;
721 else if (fstype && strncmp(fstype, "no", 2) &&
722 strncmp(fstype, "opts=", 5) && strncmp(fstype, "loop", 4) &&
723 !strchr(fstype, ','))
724 type = fstype;
725 else
726 type = DEFAULT_FSTYPE;
727
728 num_running++;
729 retval = execute(type, fs->device, fs->mountpt, interactive);
730 if (retval) {
731 fprintf(stderr, _("%s: Error %d while executing fsck.%s "
732 "for %s\n"), progname, retval, type, fs->device);
733 num_running--;
734 }
735 }
736
737
738 /*
739 * Deal with the fsck -t argument.
740 */
741 static struct fs_type_compile {
742 char **list;
743 int *type;
744 int negate;
745 } fs_type_compiled;
746
747 #define FS_TYPE_NORMAL 0
748 #define FS_TYPE_OPT 1
749 #define FS_TYPE_NEGOPT 2
750
751 static const char *fs_type_syntax_error =
752 N_("Either all or none of the filesystem types passed to -t must be prefixed\n"
753 "with 'no' or '!'.\n");
754
compile_fs_type(char * fs_type,struct fs_type_compile * cmp)755 static void compile_fs_type(char *fs_type, struct fs_type_compile *cmp)
756 {
757 char *cp, *list, *s;
758 int num = 2;
759 int negate, first_negate = 1;
760
761 if (fs_type) {
762 for (cp=fs_type; *cp; cp++) {
763 if (*cp == ',')
764 num++;
765 }
766 }
767
768 cmp->list = malloc(num * sizeof(char *));
769 cmp->type = malloc(num * sizeof(int));
770 if (!cmp->list || !cmp->type) {
771 fputs(_("Couldn't allocate memory for filesystem types\n"),
772 stderr);
773 exit(EXIT_ERROR);
774 }
775 memset(cmp->list, 0, num * sizeof(char *));
776 memset(cmp->type, 0, num * sizeof(int));
777 cmp->negate = 0;
778
779 if (!fs_type)
780 return;
781
782 list = string_copy(fs_type);
783 num = 0;
784 s = strtok(list, ",");
785 while(s) {
786 negate = 0;
787 if (strncmp(s, "no", 2) == 0) {
788 s += 2;
789 negate = 1;
790 } else if (*s == '!') {
791 s++;
792 negate = 1;
793 }
794 if (strcmp(s, "loop") == 0)
795 /* loop is really short-hand for opts=loop */
796 goto loop_special_case;
797 else if (strncmp(s, "opts=", 5) == 0) {
798 s += 5;
799 loop_special_case:
800 cmp->type[num] = negate ? FS_TYPE_NEGOPT : FS_TYPE_OPT;
801 } else {
802 if (first_negate) {
803 cmp->negate = negate;
804 first_negate = 0;
805 }
806 if ((negate && !cmp->negate) ||
807 (!negate && cmp->negate)) {
808 fputs(_(fs_type_syntax_error), stderr);
809 exit(EXIT_USAGE);
810 }
811 }
812 #if 0
813 printf("Adding %s to list (type %d).\n", s, cmp->type[num]);
814 #endif
815 cmp->list[num++] = string_copy(s);
816 s = strtok(NULL, ",");
817 }
818 free(list);
819 }
820
821 /*
822 * This function returns true if a particular option appears in a
823 * comma-delimited options list
824 */
opt_in_list(const char * opt,char * optlist)825 static int opt_in_list(const char *opt, char *optlist)
826 {
827 char *list, *s;
828
829 if (!optlist)
830 return 0;
831 list = string_copy(optlist);
832
833 s = strtok(list, ",");
834 while(s) {
835 if (strcmp(s, opt) == 0) {
836 free(list);
837 return 1;
838 }
839 s = strtok(NULL, ",");
840 }
841 free(list);
842 return 0;
843 }
844
845 /* See if the filesystem matches the criteria given by the -t option */
fs_match(struct fs_info * fs,struct fs_type_compile * cmp)846 static int fs_match(struct fs_info *fs, struct fs_type_compile *cmp)
847 {
848 int n, ret = 0, checked_type = 0;
849 char *cp;
850
851 if (cmp->list == 0 || cmp->list[0] == 0)
852 return 1;
853
854 for (n=0; (cp = cmp->list[n]); n++) {
855 switch (cmp->type[n]) {
856 case FS_TYPE_NORMAL:
857 checked_type++;
858 if (strcmp(cp, fs->type) == 0) {
859 ret = 1;
860 }
861 break;
862 case FS_TYPE_NEGOPT:
863 if (opt_in_list(cp, fs->opts))
864 return 0;
865 break;
866 case FS_TYPE_OPT:
867 if (!opt_in_list(cp, fs->opts))
868 return 0;
869 break;
870 }
871 }
872 if (checked_type == 0)
873 return 1;
874 return (cmp->negate ? !ret : ret);
875 }
876
877 /* Check if we should ignore this filesystem. */
ignore(struct fs_info * fs)878 static int ignore(struct fs_info *fs)
879 {
880 const char **ip;
881 int wanted = 0;
882
883 /*
884 * If the pass number is 0, ignore it.
885 */
886 if (fs->passno == 0)
887 return 1;
888
889 /*
890 * If this is a bind mount, ignore it.
891 */
892 if (opt_in_list("bind", fs->opts)) {
893 fprintf(stderr,
894 _("%s: skipping bad line in /etc/fstab: bind mount with nonzero fsck pass number\n"),
895 fs->mountpt);
896 return 1;
897 }
898
899 interpret_type(fs);
900
901 /*
902 * If a specific fstype is specified, and it doesn't match,
903 * ignore it.
904 */
905 if (!fs_match(fs, &fs_type_compiled)) return 1;
906
907 /* Are we ignoring this type? */
908 for(ip = ignored_types; *ip; ip++)
909 if (strcmp(fs->type, *ip) == 0) return 1;
910
911 /* Do we really really want to check this fs? */
912 for(ip = really_wanted; *ip; ip++)
913 if (strcmp(fs->type, *ip) == 0) {
914 wanted = 1;
915 break;
916 }
917
918 /* See if the <fsck.fs> program is available. */
919 if (find_fsck(fs->type) == NULL) {
920 if (wanted)
921 fprintf(stderr, _("fsck: cannot check %s: fsck.%s not found\n"),
922 fs->device, fs->type);
923 return 1;
924 }
925
926 /* We can and want to check this file system type. */
927 return 0;
928 }
929
930 /*
931 * Returns TRUE if a partition on the same disk is already being
932 * checked.
933 */
device_already_active(char * device)934 static int device_already_active(char *device)
935 {
936 struct fsck_instance *inst;
937 char *base;
938
939 if (force_all_parallel)
940 return 0;
941
942 #ifdef BASE_MD
943 /* Don't check a soft raid disk with any other disk */
944 if (instance_list &&
945 (!strncmp(instance_list->device, BASE_MD, sizeof(BASE_MD)-1) ||
946 !strncmp(device, BASE_MD, sizeof(BASE_MD)-1)))
947 return 1;
948 #endif
949
950 base = base_device(device);
951 /*
952 * If we don't know the base device, assume that the device is
953 * already active if there are any fsck instances running.
954 */
955 if (!base)
956 return (instance_list != 0);
957 for (inst = instance_list; inst; inst = inst->next) {
958 if (!inst->base_device || !strcmp(base, inst->base_device)) {
959 free(base);
960 return 1;
961 }
962 }
963 free(base);
964 return 0;
965 }
966
967 /* Check all file systems, using the /etc/fstab table. */
check_all(NOARGS)968 static int check_all(NOARGS)
969 {
970 struct fs_info *fs = NULL;
971 int status = EXIT_OK;
972 int not_done_yet = 1;
973 int passno = 1;
974 int pass_done;
975
976 if (verbose)
977 fputs(_("Checking all file systems.\n"), stdout);
978
979 /*
980 * Do an initial scan over the filesystem; mark filesystems
981 * which should be ignored as done, and resolve any "auto"
982 * filesystem types (done as a side-effect of calling ignore()).
983 */
984 for (fs = filesys_info; fs; fs = fs->next) {
985 if (ignore(fs))
986 fs->flags |= FLAG_DONE;
987 }
988
989 /*
990 * Find and check the root filesystem.
991 */
992 if (!parallel_root) {
993 for (fs = filesys_info; fs; fs = fs->next) {
994 if (!strcmp(fs->mountpt, "/"))
995 break;
996 }
997 if (fs) {
998 if (!skip_root && !ignore(fs) &&
999 !(ignore_mounted && is_mounted(fs->device))) {
1000 fsck_device(fs, 1);
1001 status |= wait_many(FLAG_WAIT_ALL);
1002 if (status > EXIT_NONDESTRUCT)
1003 return status;
1004 }
1005 fs->flags |= FLAG_DONE;
1006 }
1007 }
1008 /*
1009 * This is for the bone-headed user who enters the root
1010 * filesystem twice. Skip root will skip all root entries.
1011 */
1012 if (skip_root)
1013 for (fs = filesys_info; fs; fs = fs->next)
1014 if (!strcmp(fs->mountpt, "/"))
1015 fs->flags |= FLAG_DONE;
1016
1017 while (not_done_yet) {
1018 not_done_yet = 0;
1019 pass_done = 1;
1020
1021 for (fs = filesys_info; fs; fs = fs->next) {
1022 if (cancel_requested)
1023 break;
1024 if (fs->flags & FLAG_DONE)
1025 continue;
1026 /*
1027 * If the filesystem's pass number is higher
1028 * than the current pass number, then we don't
1029 * do it yet.
1030 */
1031 if (fs->passno > passno) {
1032 not_done_yet++;
1033 continue;
1034 }
1035 if (ignore_mounted && is_mounted(fs->device)) {
1036 fs->flags |= FLAG_DONE;
1037 continue;
1038 }
1039 /*
1040 * If a filesystem on a particular device has
1041 * already been spawned, then we need to defer
1042 * this to another pass.
1043 */
1044 if (device_already_active(fs->device)) {
1045 pass_done = 0;
1046 continue;
1047 }
1048 /*
1049 * Spawn off the fsck process
1050 */
1051 fsck_device(fs, serialize);
1052 fs->flags |= FLAG_DONE;
1053
1054 /*
1055 * Only do one filesystem at a time, or if we
1056 * have a limit on the number of fsck's extant
1057 * at one time, apply that limit.
1058 */
1059 if (serialize ||
1060 (max_running && (num_running >= max_running))) {
1061 pass_done = 0;
1062 break;
1063 }
1064 }
1065 if (cancel_requested)
1066 break;
1067 if (verbose > 1)
1068 printf(_("--waiting-- (pass %d)\n"), passno);
1069 status |= wait_many(pass_done ? FLAG_WAIT_ALL :
1070 FLAG_WAIT_ATLEAST_ONE);
1071 if (pass_done) {
1072 if (verbose > 1)
1073 printf("----------------------------------\n");
1074 passno++;
1075 } else
1076 not_done_yet++;
1077 }
1078 if (cancel_requested && !kill_sent) {
1079 kill_all(SIGTERM);
1080 kill_sent++;
1081 }
1082 status |= wait_many(FLAG_WAIT_ATLEAST_ONE);
1083 return status;
1084 }
1085
usage(NOARGS)1086 static void usage(NOARGS)
1087 {
1088 fputs(_("Usage: fsck [-AMNPRTV] [ -C [ fd ] ] [-t fstype] [fs-options] [filesys ...]\n"), stderr);
1089 exit(EXIT_USAGE);
1090 }
1091
1092 #ifdef HAVE_SIGNAL_H
signal_cancel(int sig FSCK_ATTR ((unused)))1093 static void signal_cancel(int sig FSCK_ATTR((unused)))
1094 {
1095 cancel_requested++;
1096 }
1097 #endif
1098
PRS(int argc,char * argv[])1099 static void PRS(int argc, char *argv[])
1100 {
1101 int i, j;
1102 char *arg, *dev, *tmp = 0;
1103 char options[128];
1104 int opt = 0;
1105 int opts_for_fsck = 0;
1106 #ifdef HAVE_SIGNAL_H
1107 struct sigaction sa;
1108
1109 /*
1110 * Set up signal action
1111 */
1112 memset(&sa, 0, sizeof(struct sigaction));
1113 sa.sa_handler = signal_cancel;
1114 sigaction(SIGINT, &sa, 0);
1115 sigaction(SIGTERM, &sa, 0);
1116 #endif
1117
1118 num_devices = 0;
1119 num_args = 0;
1120 instance_list = 0;
1121
1122 progname = argv[0];
1123
1124 for (i=1; i < argc; i++) {
1125 arg = argv[i];
1126 if (!arg)
1127 continue;
1128 if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) {
1129 if (num_devices >= MAX_DEVICES) {
1130 fprintf(stderr, _("%s: too many devices\n"),
1131 progname);
1132 exit(EXIT_ERROR);
1133 }
1134 dev = get_devname(cache, arg, NULL);
1135 if (!dev && strchr(arg, '=')) {
1136 /*
1137 * Check to see if we failed because
1138 * /proc/partitions isn't found.
1139 */
1140 if (access("/proc/partitions", R_OK) < 0) {
1141 fprintf(stderr, "Couldn't open /proc/partitions: %s\n",
1142 strerror(errno));
1143 fprintf(stderr, "Is /proc mounted?\n");
1144 exit(EXIT_ERROR);
1145 }
1146 /*
1147 * Check to see if this is because
1148 * we're not running as root
1149 */
1150 if (geteuid())
1151 fprintf(stderr,
1152 "Must be root to scan for matching filesystems: %s\n", arg);
1153 else
1154 fprintf(stderr,
1155 "Couldn't find matching filesystem: %s\n", arg);
1156 exit(EXIT_ERROR);
1157 }
1158 devices[num_devices++] = dev ? dev : string_copy(arg);
1159 continue;
1160 }
1161 if (arg[0] != '-' || opts_for_fsck) {
1162 if (num_args >= MAX_ARGS) {
1163 fprintf(stderr, _("%s: too many arguments\n"),
1164 progname);
1165 exit(EXIT_ERROR);
1166 }
1167 args[num_args++] = string_copy(arg);
1168 continue;
1169 }
1170 for (j=1; arg[j]; j++) {
1171 if (opts_for_fsck) {
1172 options[++opt] = arg[j];
1173 continue;
1174 }
1175 switch (arg[j]) {
1176 case 'A':
1177 doall++;
1178 break;
1179 case 'C':
1180 progress++;
1181 if (arg[j+1]) {
1182 progress_fd = string_to_int(arg+j+1);
1183 if (progress_fd < 0)
1184 progress_fd = 0;
1185 else
1186 goto next_arg;
1187 } else if (argc > i + 1 &&
1188 argv[i + 1][0] != '-') {
1189 progress_fd = string_to_int(argv[i]);
1190 if (progress_fd < 0)
1191 progress_fd = 0;
1192 else {
1193 ++i;
1194 goto next_arg;
1195 }
1196 }
1197 break;
1198 case 'V':
1199 verbose++;
1200 break;
1201 case 'N':
1202 noexecute++;
1203 break;
1204 case 'R':
1205 skip_root++;
1206 break;
1207 case 'T':
1208 notitle++;
1209 break;
1210 case 'M':
1211 ignore_mounted++;
1212 break;
1213 case 'P':
1214 parallel_root++;
1215 break;
1216 case 's':
1217 serialize++;
1218 break;
1219 case 't':
1220 tmp = 0;
1221 if (fstype)
1222 usage();
1223 if (arg[j+1])
1224 tmp = arg+j+1;
1225 else if ((i+1) < argc)
1226 tmp = argv[++i];
1227 else
1228 usage();
1229 fstype = string_copy(tmp);
1230 compile_fs_type(fstype, &fs_type_compiled);
1231 goto next_arg;
1232 case '-':
1233 opts_for_fsck++;
1234 break;
1235 case '?':
1236 usage();
1237 break;
1238 default:
1239 options[++opt] = arg[j];
1240 break;
1241 }
1242 }
1243 next_arg:
1244 if (opt) {
1245 options[0] = '-';
1246 options[++opt] = '\0';
1247 if (num_args >= MAX_ARGS) {
1248 fprintf(stderr,
1249 _("%s: too many arguments\n"),
1250 progname);
1251 exit(EXIT_ERROR);
1252 }
1253 args[num_args++] = string_copy(options);
1254 opt = 0;
1255 }
1256 }
1257 if (getenv("FSCK_FORCE_ALL_PARALLEL"))
1258 force_all_parallel++;
1259 if ((tmp = getenv("FSCK_MAX_INST")))
1260 max_running = atoi(tmp);
1261 }
1262
main(int argc,char * argv[])1263 int main(int argc, char *argv[])
1264 {
1265 int i, status = 0;
1266 int interactive = 0;
1267 char *oldpath = getenv("PATH");
1268 const char *fstab;
1269 struct fs_info *fs;
1270
1271 setvbuf(stdout, NULL, _IONBF, BUFSIZ);
1272 setvbuf(stderr, NULL, _IONBF, BUFSIZ);
1273
1274 #ifdef ENABLE_NLS
1275 setlocale(LC_MESSAGES, "");
1276 setlocale(LC_CTYPE, "");
1277 bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1278 textdomain(NLS_CAT_NAME);
1279 #endif
1280 blkid_get_cache(&cache, NULL);
1281 PRS(argc, argv);
1282
1283 if (!notitle)
1284 printf("fsck %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1285
1286 fstab = getenv("FSTAB_FILE");
1287 if (!fstab)
1288 fstab = _PATH_MNTTAB;
1289 load_fs_info(fstab);
1290
1291 /* Update our search path to include uncommon directories. */
1292 if (oldpath) {
1293 fsck_path = malloc (strlen (fsck_prefix_path) + 1 +
1294 strlen (oldpath) + 1);
1295 if (!fsck_path) {
1296 fprintf(stderr, "%s: Unable to allocate memory for fsck_path\n", progname);
1297 exit(EXIT_ERROR);
1298 }
1299 strcpy (fsck_path, fsck_prefix_path);
1300 strcat (fsck_path, ":");
1301 strcat (fsck_path, oldpath);
1302 } else {
1303 fsck_path = string_copy(fsck_prefix_path);
1304 }
1305
1306 if ((num_devices == 1) || (serialize))
1307 interactive = 1;
1308
1309 /* If -A was specified ("check all"), do that! */
1310 if (doall)
1311 return check_all();
1312
1313 if (num_devices == 0) {
1314 serialize++;
1315 interactive++;
1316 return check_all();
1317 }
1318 for (i = 0 ; i < num_devices; i++) {
1319 if (cancel_requested) {
1320 if (!kill_sent) {
1321 kill_all(SIGTERM);
1322 kill_sent++;
1323 }
1324 break;
1325 }
1326 fs = lookup(devices[i]);
1327 if (!fs) {
1328 fs = create_fs_device(devices[i], 0, "auto",
1329 0, -1, -1);
1330 if (!fs)
1331 continue;
1332 }
1333 if (ignore_mounted && is_mounted(fs->device))
1334 continue;
1335 fsck_device(fs, interactive);
1336 if (serialize ||
1337 (max_running && (num_running >= max_running))) {
1338 struct fsck_instance *inst;
1339
1340 inst = wait_one(0);
1341 if (inst) {
1342 status |= inst->exit_status;
1343 free_instance(inst);
1344 }
1345 if (verbose > 1)
1346 printf("----------------------------------\n");
1347 }
1348 }
1349 status |= wait_many(FLAG_WAIT_ALL);
1350 free(fsck_path);
1351 blkid_put_cache(cache);
1352 return status;
1353 }
1354