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