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