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 int len = snprintf(prog, sizeof(prog), tpl, s, type);
412
413 if ((len < 0) || (len >= (int) sizeof(prog)))
414 continue;
415 if (stat(prog, &st) == 0)
416 break;
417 }
418 free(p);
419 return(s ? prog : NULL);
420 }
421
progress_active(NOARGS)422 static int progress_active(NOARGS)
423 {
424 struct fsck_instance *inst;
425
426 for (inst = instance_list; inst; inst = inst->next) {
427 if (inst->flags & FLAG_DONE)
428 continue;
429 if (inst->flags & FLAG_PROGRESS)
430 return 1;
431 }
432 return 0;
433 }
434
435 /*
436 * Execute a particular fsck program, and link it into the list of
437 * child processes we are waiting for.
438 */
execute(const char * type,const char * device,const char * mntpt,int interactive)439 static int execute(const char *type, const char *device, const char *mntpt,
440 int interactive)
441 {
442 char *s, *argv[80], prog[256];
443 int argc, i, len;
444 struct fsck_instance *inst, *p;
445 pid_t pid;
446
447 len = snprintf(prog, sizeof(prog), "fsck.%s", type);
448 if ((len < 0) || (len >= (int) sizeof(prog)))
449 return EINVAL;
450
451 inst = malloc(sizeof(struct fsck_instance));
452 if (!inst)
453 return ENOMEM;
454 memset(inst, 0, sizeof(struct fsck_instance));
455
456 argv[0] = string_copy(prog);
457 argc = 1;
458
459 for (i=0; i <num_args; i++)
460 argv[argc++] = string_copy(args[i]);
461
462 if (progress) {
463 if ((strcmp(type, "ext2") == 0) ||
464 (strcmp(type, "ext3") == 0) ||
465 (strcmp(type, "ext4") == 0) ||
466 (strcmp(type, "ext4dev") == 0)) {
467 char tmp[80];
468
469 tmp[0] = 0;
470 if (!progress_active()) {
471 snprintf(tmp, 80, "-C%d", progress_fd);
472 inst->flags |= FLAG_PROGRESS;
473 } else if (progress_fd)
474 snprintf(tmp, 80, "-C%d", progress_fd * -1);
475 if (tmp[0])
476 argv[argc++] = string_copy(tmp);
477 }
478 }
479
480 argv[argc++] = string_copy(device);
481 argv[argc] = 0;
482
483 s = find_fsck(prog);
484 if (s == NULL) {
485 fprintf(stderr, _("fsck: %s: not found\n"), prog);
486 free(inst);
487 return ENOENT;
488 }
489
490 if (verbose || noexecute) {
491 printf("[%s (%d) -- %s] ", s, num_running,
492 mntpt ? mntpt : device);
493 for (i=0; i < argc; i++)
494 printf("%s ", argv[i]);
495 printf("\n");
496 }
497
498 /* Fork and execute the correct program. */
499 if (noexecute)
500 pid = -1;
501 else if ((pid = fork()) < 0) {
502 perror("fork");
503 free(inst);
504 return errno;
505 } else if (pid == 0) {
506 if (!interactive)
507 close(0);
508 (void) execv(s, argv);
509 perror(argv[0]);
510 free(inst);
511 exit(EXIT_ERROR);
512 }
513
514 for (i=0; i < argc; i++)
515 free(argv[i]);
516
517 inst->pid = pid;
518 inst->prog = string_copy(prog);
519 inst->type = string_copy(type);
520 inst->device = string_copy(device);
521 inst->base_device = base_device(device);
522 inst->start_time = time(0);
523 inst->next = NULL;
524
525 /*
526 * Find the end of the list, so we add the instance on at the end.
527 */
528 for (p = instance_list; p && p->next; p = p->next);
529
530 if (p)
531 p->next = inst;
532 else
533 instance_list = inst;
534
535 return 0;
536 }
537
538 /*
539 * Send a signal to all outstanding fsck child processes
540 */
kill_all(int signum)541 static int kill_all(int signum)
542 {
543 struct fsck_instance *inst;
544 int n = 0;
545
546 for (inst = instance_list; inst; inst = inst->next) {
547 if (inst->flags & FLAG_DONE)
548 continue;
549 kill(inst->pid, signum);
550 n++;
551 }
552 return n;
553 }
554
555 /*
556 * Wait for one child process to exit; when it does, unlink it from
557 * the list of executing child processes, and return it.
558 */
wait_one(int flags)559 static struct fsck_instance *wait_one(int flags)
560 {
561 int status;
562 int sig;
563 struct fsck_instance *inst, *inst2, *prev;
564 pid_t pid;
565
566 if (!instance_list)
567 return NULL;
568
569 if (noexecute) {
570 inst = instance_list;
571 prev = 0;
572 #ifdef RANDOM_DEBUG
573 while (inst->next && (random() & 1)) {
574 prev = inst;
575 inst = inst->next;
576 }
577 #endif
578 inst->exit_status = 0;
579 goto ret_inst;
580 }
581
582 /*
583 * gcc -Wall fails saving throw against stupidity
584 * (inst and prev are thought to be uninitialized variables)
585 */
586 inst = prev = NULL;
587
588 do {
589 pid = waitpid(-1, &status, flags);
590 if (cancel_requested && !kill_sent) {
591 kill_all(SIGTERM);
592 kill_sent++;
593 }
594 if ((pid == 0) && (flags & WNOHANG))
595 return NULL;
596 if (pid < 0) {
597 if ((errno == EINTR) || (errno == EAGAIN))
598 continue;
599 if (errno == ECHILD) {
600 fprintf(stderr,
601 _("%s: wait: No more child process?!?\n"),
602 progname);
603 return NULL;
604 }
605 perror("wait");
606 continue;
607 }
608 for (prev = 0, inst = instance_list;
609 inst;
610 prev = inst, inst = inst->next) {
611 if (inst->pid == pid)
612 break;
613 }
614 } while (!inst);
615
616 if (WIFEXITED(status))
617 status = WEXITSTATUS(status);
618 else if (WIFSIGNALED(status)) {
619 sig = WTERMSIG(status);
620 if (sig == SIGINT) {
621 status = EXIT_UNCORRECTED;
622 } else {
623 printf(_("Warning... %s for device %s exited "
624 "with signal %d.\n"),
625 inst->prog, inst->device, sig);
626 status = EXIT_ERROR;
627 }
628 } else {
629 printf(_("%s %s: status is %x, should never happen.\n"),
630 inst->prog, inst->device, status);
631 status = EXIT_ERROR;
632 }
633 inst->exit_status = status;
634 inst->flags |= FLAG_DONE;
635 if (progress && (inst->flags & FLAG_PROGRESS) &&
636 !progress_active()) {
637 for (inst2 = instance_list; inst2; inst2 = inst2->next) {
638 if (inst2->flags & FLAG_DONE)
639 continue;
640 if (strcmp(inst2->type, "ext2") &&
641 strcmp(inst2->type, "ext3") &&
642 strcmp(inst2->type, "ext4") &&
643 strcmp(inst2->type, "ext4dev"))
644 continue;
645 /*
646 * If we've just started the fsck, wait a tiny
647 * bit before sending the kill, to give it
648 * time to set up the signal handler
649 */
650 if (inst2->start_time < time(0)+2) {
651 if (fork() == 0) {
652 sleep(1);
653 kill(inst2->pid, SIGUSR1);
654 exit(0);
655 }
656 } else
657 kill(inst2->pid, SIGUSR1);
658 inst2->flags |= FLAG_PROGRESS;
659 break;
660 }
661 }
662 ret_inst:
663 if (prev)
664 prev->next = inst->next;
665 else
666 instance_list = inst->next;
667 if (verbose > 1)
668 printf(_("Finished with %s (exit status %d)\n"),
669 inst->device, inst->exit_status);
670 num_running--;
671 return inst;
672 }
673
674 #define FLAG_WAIT_ALL 0
675 #define FLAG_WAIT_ATLEAST_ONE 1
676 /*
677 * Wait until all executing child processes have exited; return the
678 * logical OR of all of their exit code values.
679 */
wait_many(int flags)680 static int wait_many(int flags)
681 {
682 struct fsck_instance *inst;
683 int global_status = 0;
684 int wait_flags = 0;
685
686 while ((inst = wait_one(wait_flags))) {
687 global_status |= inst->exit_status;
688 free_instance(inst);
689 #ifdef RANDOM_DEBUG
690 if (noexecute && (flags & WNOHANG) && !(random() % 3))
691 break;
692 #endif
693 if (flags & FLAG_WAIT_ATLEAST_ONE)
694 wait_flags = WNOHANG;
695 }
696 return global_status;
697 }
698
699 /*
700 * Run the fsck program on a particular device
701 *
702 * If the type is specified using -t, and it isn't prefixed with "no"
703 * (as in "noext2") and only one filesystem type is specified, then
704 * use that type regardless of what is specified in /etc/fstab.
705 *
706 * If the type isn't specified by the user, then use either the type
707 * specified in /etc/fstab, or DEFAULT_FSTYPE.
708 */
fsck_device(struct fs_info * fs,int interactive)709 static void fsck_device(struct fs_info *fs, int interactive)
710 {
711 const char *type;
712 int retval;
713
714 interpret_type(fs);
715
716 if (strcmp(fs->type, "auto") != 0)
717 type = fs->type;
718 else if (fstype && strncmp(fstype, "no", 2) &&
719 strncmp(fstype, "opts=", 5) && strncmp(fstype, "loop", 4) &&
720 !strchr(fstype, ','))
721 type = fstype;
722 else
723 type = DEFAULT_FSTYPE;
724
725 num_running++;
726 retval = execute(type, fs->device, fs->mountpt, interactive);
727 if (retval) {
728 fprintf(stderr, _("%s: Error %d while executing fsck.%s "
729 "for %s\n"), progname, retval, type, fs->device);
730 num_running--;
731 }
732 }
733
734
735 /*
736 * Deal with the fsck -t argument.
737 */
738 static struct fs_type_compile {
739 char **list;
740 int *type;
741 int negate;
742 } fs_type_compiled;
743
744 #define FS_TYPE_NORMAL 0
745 #define FS_TYPE_OPT 1
746 #define FS_TYPE_NEGOPT 2
747
748 static const char *fs_type_syntax_error =
749 N_("Either all or none of the filesystem types passed to -t must be prefixed\n"
750 "with 'no' or '!'.\n");
751
compile_fs_type(char * fs_type,struct fs_type_compile * cmp)752 static void compile_fs_type(char *fs_type, struct fs_type_compile *cmp)
753 {
754 char *cp, *list, *s;
755 int num = 2;
756 int negate, first_negate = 1;
757
758 if (fs_type) {
759 for (cp=fs_type; *cp; cp++) {
760 if (*cp == ',')
761 num++;
762 }
763 }
764
765 cmp->list = malloc(num * sizeof(char *));
766 cmp->type = malloc(num * sizeof(int));
767 if (!cmp->list || !cmp->type) {
768 fputs(_("Couldn't allocate memory for filesystem types\n"),
769 stderr);
770 exit(EXIT_ERROR);
771 }
772 memset(cmp->list, 0, num * sizeof(char *));
773 memset(cmp->type, 0, num * sizeof(int));
774 cmp->negate = 0;
775
776 if (!fs_type)
777 return;
778
779 list = string_copy(fs_type);
780 num = 0;
781 s = strtok(list, ",");
782 while(s) {
783 negate = 0;
784 if (strncmp(s, "no", 2) == 0) {
785 s += 2;
786 negate = 1;
787 } else if (*s == '!') {
788 s++;
789 negate = 1;
790 }
791 if (strcmp(s, "loop") == 0)
792 /* loop is really short-hand for opts=loop */
793 goto loop_special_case;
794 else if (strncmp(s, "opts=", 5) == 0) {
795 s += 5;
796 loop_special_case:
797 cmp->type[num] = negate ? FS_TYPE_NEGOPT : FS_TYPE_OPT;
798 } else {
799 if (first_negate) {
800 cmp->negate = negate;
801 first_negate = 0;
802 }
803 if ((negate && !cmp->negate) ||
804 (!negate && cmp->negate)) {
805 fputs(_(fs_type_syntax_error), stderr);
806 exit(EXIT_USAGE);
807 }
808 }
809 #if 0
810 printf("Adding %s to list (type %d).\n", s, cmp->type[num]);
811 #endif
812 cmp->list[num++] = string_copy(s);
813 s = strtok(NULL, ",");
814 }
815 free(list);
816 }
817
818 /*
819 * This function returns true if a particular option appears in a
820 * comma-delimited options list
821 */
opt_in_list(const char * opt,char * optlist)822 static int opt_in_list(const char *opt, char *optlist)
823 {
824 char *list, *s;
825
826 if (!optlist)
827 return 0;
828 list = string_copy(optlist);
829
830 s = strtok(list, ",");
831 while(s) {
832 if (strcmp(s, opt) == 0) {
833 free(list);
834 return 1;
835 }
836 s = strtok(NULL, ",");
837 }
838 free(list);
839 return 0;
840 }
841
842 /* See if the filesystem matches the criteria given by the -t option */
fs_match(struct fs_info * fs,struct fs_type_compile * cmp)843 static int fs_match(struct fs_info *fs, struct fs_type_compile *cmp)
844 {
845 int n, ret = 0, checked_type = 0;
846 char *cp;
847
848 if (cmp->list == 0 || cmp->list[0] == 0)
849 return 1;
850
851 for (n=0; (cp = cmp->list[n]); n++) {
852 switch (cmp->type[n]) {
853 case FS_TYPE_NORMAL:
854 checked_type++;
855 if (strcmp(cp, fs->type) == 0) {
856 ret = 1;
857 }
858 break;
859 case FS_TYPE_NEGOPT:
860 if (opt_in_list(cp, fs->opts))
861 return 0;
862 break;
863 case FS_TYPE_OPT:
864 if (!opt_in_list(cp, fs->opts))
865 return 0;
866 break;
867 }
868 }
869 if (checked_type == 0)
870 return 1;
871 return (cmp->negate ? !ret : ret);
872 }
873
874 /* Check if we should ignore this filesystem. */
ignore(struct fs_info * fs)875 static int ignore(struct fs_info *fs)
876 {
877 const char **ip;
878 int wanted = 0;
879
880 /*
881 * If the pass number is 0, ignore it.
882 */
883 if (fs->passno == 0)
884 return 1;
885
886 /*
887 * If this is a bind mount, ignore it.
888 */
889 if (opt_in_list("bind", fs->opts)) {
890 fprintf(stderr,
891 _("%s: skipping bad line in /etc/fstab: bind mount with nonzero fsck pass number\n"),
892 fs->mountpt);
893 return 1;
894 }
895
896 interpret_type(fs);
897
898 /*
899 * If a specific fstype is specified, and it doesn't match,
900 * ignore it.
901 */
902 if (!fs_match(fs, &fs_type_compiled)) return 1;
903
904 /* Are we ignoring this type? */
905 for(ip = ignored_types; *ip; ip++)
906 if (strcmp(fs->type, *ip) == 0) return 1;
907
908 /* Do we really really want to check this fs? */
909 for(ip = really_wanted; *ip; ip++)
910 if (strcmp(fs->type, *ip) == 0) {
911 wanted = 1;
912 break;
913 }
914
915 /* See if the <fsck.fs> program is available. */
916 if (find_fsck(fs->type) == NULL) {
917 if (wanted)
918 fprintf(stderr, _("fsck: cannot check %s: fsck.%s not found\n"),
919 fs->device, fs->type);
920 return 1;
921 }
922
923 /* We can and want to check this file system type. */
924 return 0;
925 }
926
927 /*
928 * Returns TRUE if a partition on the same disk is already being
929 * checked.
930 */
device_already_active(char * device)931 static int device_already_active(char *device)
932 {
933 struct fsck_instance *inst;
934 char *base;
935
936 if (force_all_parallel)
937 return 0;
938
939 #ifdef BASE_MD
940 /* Don't check a soft raid disk with any other disk */
941 if (instance_list &&
942 (!strncmp(instance_list->device, BASE_MD, sizeof(BASE_MD)-1) ||
943 !strncmp(device, BASE_MD, sizeof(BASE_MD)-1)))
944 return 1;
945 #endif
946
947 base = base_device(device);
948 /*
949 * If we don't know the base device, assume that the device is
950 * already active if there are any fsck instances running.
951 */
952 if (!base)
953 return (instance_list != 0);
954 for (inst = instance_list; inst; inst = inst->next) {
955 if (!inst->base_device || !strcmp(base, inst->base_device)) {
956 free(base);
957 return 1;
958 }
959 }
960 free(base);
961 return 0;
962 }
963
964 /* Check all file systems, using the /etc/fstab table. */
check_all(NOARGS)965 static int check_all(NOARGS)
966 {
967 struct fs_info *fs = NULL;
968 int status = EXIT_OK;
969 int not_done_yet = 1;
970 int passno = 1;
971 int pass_done;
972
973 if (verbose)
974 fputs(_("Checking all file systems.\n"), stdout);
975
976 /*
977 * Do an initial scan over the filesystem; mark filesystems
978 * which should be ignored as done, and resolve any "auto"
979 * filesystem types (done as a side-effect of calling ignore()).
980 */
981 for (fs = filesys_info; fs; fs = fs->next) {
982 if (ignore(fs))
983 fs->flags |= FLAG_DONE;
984 }
985
986 /*
987 * Find and check the root filesystem.
988 */
989 if (!parallel_root) {
990 for (fs = filesys_info; fs; fs = fs->next) {
991 if (!strcmp(fs->mountpt, "/"))
992 break;
993 }
994 if (fs) {
995 if (!skip_root && !ignore(fs) &&
996 !(ignore_mounted && is_mounted(fs->device))) {
997 fsck_device(fs, 1);
998 status |= wait_many(FLAG_WAIT_ALL);
999 if (status > EXIT_NONDESTRUCT)
1000 return status;
1001 }
1002 fs->flags |= FLAG_DONE;
1003 }
1004 }
1005 /*
1006 * This is for the bone-headed user who enters the root
1007 * filesystem twice. Skip root will skip all root entries.
1008 */
1009 if (skip_root)
1010 for (fs = filesys_info; fs; fs = fs->next)
1011 if (!strcmp(fs->mountpt, "/"))
1012 fs->flags |= FLAG_DONE;
1013
1014 while (not_done_yet) {
1015 not_done_yet = 0;
1016 pass_done = 1;
1017
1018 for (fs = filesys_info; fs; fs = fs->next) {
1019 if (cancel_requested)
1020 break;
1021 if (fs->flags & FLAG_DONE)
1022 continue;
1023 /*
1024 * If the filesystem's pass number is higher
1025 * than the current pass number, then we don't
1026 * do it yet.
1027 */
1028 if (fs->passno > passno) {
1029 not_done_yet++;
1030 continue;
1031 }
1032 if (ignore_mounted && is_mounted(fs->device)) {
1033 fs->flags |= FLAG_DONE;
1034 continue;
1035 }
1036 /*
1037 * If a filesystem on a particular device has
1038 * already been spawned, then we need to defer
1039 * this to another pass.
1040 */
1041 if (device_already_active(fs->device)) {
1042 pass_done = 0;
1043 continue;
1044 }
1045 /*
1046 * Spawn off the fsck process
1047 */
1048 fsck_device(fs, serialize);
1049 fs->flags |= FLAG_DONE;
1050
1051 /*
1052 * Only do one filesystem at a time, or if we
1053 * have a limit on the number of fsck's extant
1054 * at one time, apply that limit.
1055 */
1056 if (serialize ||
1057 (max_running && (num_running >= max_running))) {
1058 pass_done = 0;
1059 break;
1060 }
1061 }
1062 if (cancel_requested)
1063 break;
1064 if (verbose > 1)
1065 printf(_("--waiting-- (pass %d)\n"), passno);
1066 status |= wait_many(pass_done ? FLAG_WAIT_ALL :
1067 FLAG_WAIT_ATLEAST_ONE);
1068 if (pass_done) {
1069 if (verbose > 1)
1070 printf("----------------------------------\n");
1071 passno++;
1072 } else
1073 not_done_yet++;
1074 }
1075 if (cancel_requested && !kill_sent) {
1076 kill_all(SIGTERM);
1077 kill_sent++;
1078 }
1079 status |= wait_many(FLAG_WAIT_ATLEAST_ONE);
1080 return status;
1081 }
1082
usage(NOARGS)1083 static void usage(NOARGS)
1084 {
1085 fputs(_("Usage: fsck [-AMNPRTV] [ -C [ fd ] ] [-t fstype] [fs-options] [filesys ...]\n"), stderr);
1086 exit(EXIT_USAGE);
1087 }
1088
1089 #ifdef HAVE_SIGNAL_H
signal_cancel(int sig FSCK_ATTR ((unused)))1090 static void signal_cancel(int sig FSCK_ATTR((unused)))
1091 {
1092 cancel_requested++;
1093 }
1094 #endif
1095
PRS(int argc,char * argv[])1096 static void PRS(int argc, char *argv[])
1097 {
1098 int i, j;
1099 char *arg, *dev, *tmp = 0;
1100 char options[128];
1101 int opt = 0;
1102 int opts_for_fsck = 0;
1103 #ifdef HAVE_SIGNAL_H
1104 struct sigaction sa;
1105
1106 /*
1107 * Set up signal action
1108 */
1109 memset(&sa, 0, sizeof(struct sigaction));
1110 sa.sa_handler = signal_cancel;
1111 sigaction(SIGINT, &sa, 0);
1112 sigaction(SIGTERM, &sa, 0);
1113 #endif
1114
1115 num_devices = 0;
1116 num_args = 0;
1117 instance_list = 0;
1118
1119 progname = argv[0];
1120
1121 for (i=1; i < argc; i++) {
1122 arg = argv[i];
1123 if (!arg)
1124 continue;
1125 if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) {
1126 if (num_devices >= MAX_DEVICES) {
1127 fprintf(stderr, _("%s: too many devices\n"),
1128 progname);
1129 exit(EXIT_ERROR);
1130 }
1131 dev = blkid_get_devname(cache, arg, NULL);
1132 if (!dev && strchr(arg, '=')) {
1133 /*
1134 * Check to see if we failed because
1135 * /proc/partitions isn't found.
1136 */
1137 if (access("/proc/partitions", R_OK) < 0) {
1138 fprintf(stderr, "Couldn't open /proc/partitions: %s\n",
1139 strerror(errno));
1140 fprintf(stderr, "Is /proc mounted?\n");
1141 exit(EXIT_ERROR);
1142 }
1143 /*
1144 * Check to see if this is because
1145 * we're not running as root
1146 */
1147 if (geteuid())
1148 fprintf(stderr,
1149 "Must be root to scan for matching filesystems: %s\n", arg);
1150 else
1151 fprintf(stderr,
1152 "Couldn't find matching filesystem: %s\n", arg);
1153 exit(EXIT_ERROR);
1154 }
1155 devices[num_devices++] = dev ? dev : string_copy(arg);
1156 continue;
1157 }
1158 if (arg[0] != '-' || opts_for_fsck) {
1159 if (num_args >= MAX_ARGS) {
1160 fprintf(stderr, _("%s: too many arguments\n"),
1161 progname);
1162 exit(EXIT_ERROR);
1163 }
1164 args[num_args++] = string_copy(arg);
1165 continue;
1166 }
1167 for (j=1; arg[j]; j++) {
1168 if (opts_for_fsck) {
1169 options[++opt] = arg[j];
1170 continue;
1171 }
1172 switch (arg[j]) {
1173 case 'A':
1174 doall++;
1175 break;
1176 case 'C':
1177 progress++;
1178 if (arg[j+1]) {
1179 progress_fd = string_to_int(arg+j+1);
1180 if (progress_fd < 0)
1181 progress_fd = 0;
1182 else
1183 goto next_arg;
1184 } else if (argc > i + 1 &&
1185 argv[i + 1][0] != '-') {
1186 progress_fd = string_to_int(argv[i]);
1187 if (progress_fd < 0)
1188 progress_fd = 0;
1189 else {
1190 ++i;
1191 goto next_arg;
1192 }
1193 }
1194 break;
1195 case 'V':
1196 verbose++;
1197 break;
1198 case 'N':
1199 noexecute++;
1200 break;
1201 case 'R':
1202 skip_root++;
1203 break;
1204 case 'T':
1205 notitle++;
1206 break;
1207 case 'M':
1208 ignore_mounted++;
1209 break;
1210 case 'P':
1211 parallel_root++;
1212 break;
1213 case 's':
1214 serialize++;
1215 break;
1216 case 't':
1217 tmp = 0;
1218 if (fstype)
1219 usage();
1220 if (arg[j+1])
1221 tmp = arg+j+1;
1222 else if ((i+1) < argc)
1223 tmp = argv[++i];
1224 else
1225 usage();
1226 fstype = string_copy(tmp);
1227 compile_fs_type(fstype, &fs_type_compiled);
1228 goto next_arg;
1229 case '-':
1230 opts_for_fsck++;
1231 break;
1232 case '?':
1233 usage();
1234 break;
1235 default:
1236 options[++opt] = arg[j];
1237 break;
1238 }
1239 }
1240 next_arg:
1241 if (opt) {
1242 options[0] = '-';
1243 options[++opt] = '\0';
1244 if (num_args >= MAX_ARGS) {
1245 fprintf(stderr,
1246 _("%s: too many arguments\n"),
1247 progname);
1248 exit(EXIT_ERROR);
1249 }
1250 args[num_args++] = string_copy(options);
1251 opt = 0;
1252 }
1253 }
1254 if (getenv("FSCK_FORCE_ALL_PARALLEL"))
1255 force_all_parallel++;
1256 if ((tmp = getenv("FSCK_MAX_INST")))
1257 max_running = atoi(tmp);
1258 }
1259
main(int argc,char * argv[])1260 int main(int argc, char *argv[])
1261 {
1262 int i, status = 0;
1263 int interactive = 0;
1264 char *oldpath = getenv("PATH");
1265 const char *fstab;
1266 struct fs_info *fs;
1267
1268 setvbuf(stdout, NULL, _IONBF, BUFSIZ);
1269 setvbuf(stderr, NULL, _IONBF, BUFSIZ);
1270
1271 #ifdef ENABLE_NLS
1272 setlocale(LC_MESSAGES, "");
1273 setlocale(LC_CTYPE, "");
1274 bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1275 textdomain(NLS_CAT_NAME);
1276 #endif
1277 blkid_get_cache(&cache, NULL);
1278 PRS(argc, argv);
1279
1280 if (!notitle)
1281 printf("fsck %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1282
1283 fstab = getenv("FSTAB_FILE");
1284 if (!fstab)
1285 fstab = _PATH_MNTTAB;
1286 load_fs_info(fstab);
1287
1288 /* Update our search path to include uncommon directories. */
1289 if (oldpath) {
1290 fsck_path = malloc (strlen (fsck_prefix_path) + 1 +
1291 strlen (oldpath) + 1);
1292 if (!fsck_path) {
1293 fprintf(stderr, "%s: Unable to allocate memory for fsck_path\n", progname);
1294 exit(EXIT_ERROR);
1295 }
1296 strcpy (fsck_path, fsck_prefix_path);
1297 strcat (fsck_path, ":");
1298 strcat (fsck_path, oldpath);
1299 } else {
1300 fsck_path = string_copy(fsck_prefix_path);
1301 }
1302
1303 if ((num_devices == 1) || (serialize))
1304 interactive = 1;
1305
1306 /* If -A was specified ("check all"), do that! */
1307 if (doall)
1308 return check_all();
1309
1310 if (num_devices == 0) {
1311 serialize++;
1312 interactive++;
1313 return check_all();
1314 }
1315 for (i = 0 ; i < num_devices; i++) {
1316 if (cancel_requested) {
1317 if (!kill_sent) {
1318 kill_all(SIGTERM);
1319 kill_sent++;
1320 }
1321 break;
1322 }
1323 fs = lookup(devices[i]);
1324 if (!fs) {
1325 fs = create_fs_device(devices[i], 0, "auto",
1326 0, -1, -1);
1327 if (!fs)
1328 continue;
1329 }
1330 if (ignore_mounted && is_mounted(fs->device))
1331 continue;
1332 fsck_device(fs, interactive);
1333 if (serialize ||
1334 (max_running && (num_running >= max_running))) {
1335 struct fsck_instance *inst;
1336
1337 inst = wait_one(0);
1338 if (inst) {
1339 status |= inst->exit_status;
1340 free_instance(inst);
1341 }
1342 if (verbose > 1)
1343 printf("----------------------------------\n");
1344 }
1345 }
1346 status |= wait_many(FLAG_WAIT_ALL);
1347 free(fsck_path);
1348 blkid_put_cache(cache);
1349 return status;
1350 }
1351