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
9 * Written by Theodore Ts'o, <tytso@mit.edu>
11 * Usage: fsck [-AVRNTM] [-s] [-t fstype] [fs-options] device
13 * Miquel van Smoorenburg (miquels@drinkel.ow.org) 20-Oct-1994:
14 * o Changed -t fstype to behave like with mount when -A (all file
15 * systems) or -M (like mount) is specified.
16 * o fsck looks if it can find the fsck.type program to decide
17 * if it should ignore the fs type. This way more fsck programs
18 * can be added without changing this front-end.
19 * o -R flag skip root file system.
21 * Copyright (C) 1993, 1994 Theodore Ts'o. This file may be
22 * redistributed under the terms of the GNU Public License.
25 #include <sys/types.h>
27 #include <sys/signal.h>
52 #include "../version.h"
55 static const char *ignored_types[] = {
65 static const char *really_wanted[] = {
72 #ifdef DEV_DSK_DEVICES
73 static const char *base_devices[] = {
92 static const char *base_devices[] = {
113 * Global variables for options
115 char *devices[MAX_DEVICES];
116 char *args[MAX_ARGS];
117 int num_devices, num_args;
128 struct fs_info *filesys_info;
129 struct fsck_instance *instance_list;
130 const char *fsck_prefix_path = "/sbin:/sbin/fs.d:/sbin/fs:/etc/fs:/etc";
132 static int ignore(struct fs_info *);
136 extern char *strdup(const char *s);
139 static char *strdup(const char *s)
143 ret = malloc(strlen(s)+1);
150 static void free_instance(struct fsck_instance *i)
161 * Load the filesystem database from /etc/fstab
163 static void load_fs_info(NOARGS)
169 struct fs_info *fs_last = NULL;
174 /* Open the mount table. */
175 if ((mntfile = setmntent(MNTTAB, "r")) == NULL) {
180 while ((mp = getmntent(mntfile)) != NULL) {
181 fs = malloc(sizeof(struct fs_info));
182 memset(fs, 0, sizeof(struct fs_info));
183 fs->device = strdup(mp->mnt_fsname);
184 fs->mountpt = strdup(mp->mnt_dir);
185 fs->type = strdup(mp->mnt_type);
186 fs->opts = strdup(mp->mnt_opts);
187 fs->freq = mp->mnt_freq;
188 fs->passno = mp->mnt_passno;
199 (void) endmntent(mntfile);
202 fprintf(stderr, "\007\007\007"
203 "WARNING: Your /etc/fstab does not contain the fsck passno\n");
205 " field. I will kludge around things for you, but you\n");
207 " should fix your /etc/fstab file as soon as you can.\n\n");
209 for (fs = filesys_info; fs; fs = fs->next) {
215 #endif /* HAVE_MNTENT_H */
218 /* Lookup filesys in /etc/fstab and return the corresponding entry. */
219 static struct fs_info *lookup(char *filesys)
223 /* No filesys name given. */
227 for (fs = filesys_info; fs; fs = fs->next) {
228 if (!strcmp(filesys, fs->device) ||
229 !strcmp(filesys, fs->mountpt))
236 /* Find fsck program for a given fs type. */
237 static char *find_fsck(char *type)
241 static char prog[256];
242 char *p = strdup(fsck_path);
245 /* Are we looking for a program or just a type? */
246 tpl = (strncmp(type, "fsck.", 5) ? "%s/fsck.%s" : "%s/%s");
248 for(s = strtok(p, ":"); s; s = strtok(NULL, ":")) {
249 sprintf(prog, tpl, s, type);
250 if (stat(prog, &st) == 0) break;
253 return(s ? prog : NULL);
257 * Execute a particular fsck program, and link it into the list of
258 * child processes we are waiting for.
260 static int execute(char *prog, char *device)
264 struct fsck_instance *inst;
267 argv[0] = strdup(prog);
270 for (i=0; i <num_args; i++)
271 argv[argc++] = strdup(args[i]);
273 argv[argc++] = strdup(device);
278 fprintf(stderr, "fsck: %s: not found\n", prog);
282 if (verbose || noexecute) {
284 for (i=0; i < argc; i++)
285 printf("%s ", argv[i]);
291 /* Fork and execute the correct program. */
292 if ((pid = fork()) < 0) {
295 } else if (pid == 0) {
296 (void) execv(s, argv);
300 inst = malloc(sizeof(struct fsck_instance));
303 memset(inst, 0, sizeof(struct fsck_instance));
305 inst->prog = strdup(prog);
306 inst->device = strdup(device);
307 inst->next = instance_list;
308 instance_list = inst;
314 * Wait for one child process to exit; when it does, unlink it from
315 * the list of executing child processes, and return it.
317 static struct fsck_instance *wait_one(NOARGS)
321 struct fsck_instance *inst, *prev;
330 if ((errno == EINTR) || (errno == EAGAIN))
332 if (errno == ECHILD) {
334 "%s: wait: No more child process?!?\n",
341 for (prev = 0, inst = instance_list;
343 prev = inst, inst = inst->next) {
344 if (inst->pid == pid)
348 printf("Unexpected child process %d, status = 0x%x\n",
352 if (WIFEXITED(status))
353 status = WEXITSTATUS(status);
354 else if (WIFSIGNALED(status)) {
355 sig = WTERMSIG(status);
357 status = EXIT_UNCORRECTED;
359 printf("Warning... %s for device %s exited "
361 inst->prog, inst->device, sig);
365 printf("%s %s: status is %x, should never happen.\n",
366 inst->prog, inst->device, status);
369 inst->exit_status = status;
371 prev->next = inst->next;
373 instance_list = inst->next;
378 * Wait until all executing child processes have exited; return the
379 * logical OR of all of their exit code values.
381 static int wait_all(NOARGS)
383 struct fsck_instance *inst;
384 int global_status = 0;
386 while (instance_list) {
390 global_status |= inst->exit_status;
393 return global_status;
397 * Run the fsck program on a particular device
399 * If the type is specified using -t, and it isn't prefixed with "no"
400 * (as in "noext2") and only one filesystem type is specified, then
401 * use that type regardless of what is specified in /etc/fstab.
403 * If the type isn't specified by the user, then use either the type
404 * specified in /etc/fstab, or DEFAULT_FSTYPE.
406 static void fsck_device(char *device)
408 const char *type = 0;
409 struct fs_info *fsent;
413 if (fstype && strncmp(fstype, "no", 2) && !strchr(fstype, ','))
416 if ((fsent = lookup(device))) {
417 device = fsent->device;
422 type = DEFAULT_FSTYPE;
424 sprintf(prog, "fsck.%s", type);
425 retval = execute(prog, device);
427 fprintf(stderr, "%s: Error %d while executing %s for %s\n",
428 progname, retval, prog, device);
432 /* See if filesystem type matches the list. */
433 static int fs_match(char *type, char *fs_type)
435 int ret = 0, negate = 0;
439 if (!fs_type) return(1);
441 if (strncmp(fs_type, "no", 2) == 0) {
445 strcpy(list, fs_type);
446 s = strtok(list, ",");
448 if (strcmp(s, type) == 0) {
452 s = strtok(NULL, ",");
454 return(negate ? !ret : ret);
458 /* Check if we should ignore this filesystem. */
459 static int ignore(struct fs_info *fs)
466 * If the pass number is 0, ignore it.
472 * If a specific fstype is specified, and it doesn't match,
475 if (!fs_match(fs->type, fstype)) return 1;
477 /* Noauto never matches. */
478 for (cp = strtok(fs->opts, ","); cp != NULL; cp = strtok(NULL, ",")) {
479 if (!strcmp(cp, "noauto"))
483 /* Are we ignoring this type? */
484 for(ip = ignored_types; *ip; ip++)
485 if (strcmp(fs->type, *ip) == 0) return(1);
487 /* Do we really really want to check this fs? */
488 for(ip = really_wanted; *ip; ip++)
489 if (strcmp(fs->type, *ip) == 0) {
494 /* See if the <fsck.fs> program is available. */
495 if (find_fsck(fs->type) == NULL) {
497 fprintf(stderr, "fsck: cannot check %s: fsck.%s not found\n",
498 fs->device, fs->type);
502 /* We can and want to check this file system type. */
507 * Return the "base device" given a particular device; this is used to
508 * assure that we only fsck one partition on a particular drive at any
509 * one time. Otherwise, the disk heads will be seeking all over the
512 static const char *base_device(char *device)
516 for (base = base_devices; *base; base++) {
517 if (!strncmp(*base, device, strlen(*base)))
524 * Returns TRUE if a partition on the same disk is already being
527 static int device_already_active(char *device)
529 struct fsck_instance *inst;
532 base = base_device(device);
534 for (inst = instance_list; inst; inst = inst->next) {
535 if (!strcmp(base, base_device(inst->device)))
542 /* Check all file systems, using the /etc/fstab table. */
543 static int check_all(NOARGS)
546 struct fsck_instance *inst;
547 int status = EXIT_OK;
548 int not_done_yet = 1;
553 printf("Checking all file systems.\n");
556 * Find and check the root filesystem first.
558 for (fs = filesys_info; fs; fs = fs->next) {
559 if (!strcmp(fs->mountpt, "/"))
562 if (fs && !skip_root && !ignore(fs)) {
563 fsck_device(fs->device);
564 fs->flags |= FLAG_DONE;
565 status |= wait_all();
566 if (status > EXIT_NONDESTRUCT)
569 if (fs) fs->flags |= FLAG_DONE;
572 * Mark filesystems that should be ignored as done.
574 for (fs = filesys_info; fs; fs = fs->next) {
576 fs->flags |= FLAG_DONE;
579 while (not_done_yet) {
583 for (fs = filesys_info; fs; fs = fs->next) {
584 if (fs->flags & FLAG_DONE)
587 * If the filesystem's pass number is higher
588 * than the current pass number, then we don't
591 if (fs->passno > passno) {
596 * If a filesystem on a particular device has
597 * already been spawned, then we need to defer
598 * this to another pass.
600 if (device_already_active(fs->device)) {
605 * Spawn off the fsck process
607 fsck_device(fs->device);
608 fs->flags |= FLAG_DONE;
612 break; /* Only do one filesystem at a time */
618 status |= inst->exit_status;
622 status |= wait_all();
624 printf("----------------------------------\n");
629 status |= wait_all();
633 static void usage(NOARGS)
636 "Usage: fsck [-AV] [-t fstype] [fs-options] filesys\n");
640 static void PRS(int argc, char *argv[])
646 int opts_for_fsck = 0;
656 for (i=1; i < argc; i++) {
661 if (num_devices >= MAX_DEVICES) {
662 fprintf(stderr, "%s: too many devices\n",
666 devices[num_devices++] = strdup(arg);
670 if (num_args >= MAX_ARGS) {
671 fprintf(stderr, "%s: too many arguments\n",
675 args[num_args++] = strdup(arg);
678 for (j=1; arg[j]; j++) {
680 options[++opt] = arg[j];
707 fstype = strdup(arg+j+1);
712 fstype = strdup(argv[i]);
721 options[++opt] = arg[j];
728 options[++opt] = '\0';
729 if (num_args >= MAX_ARGS) {
731 "%s: too many arguments\n",
735 args[num_args++] = strdup(options);
741 int main(int argc, char *argv[])
745 char *oldpath = getenv("PATH");
750 printf("Parallelizing fsck version %s (%s)\n",
751 E2FSPROGS_VERSION, E2FSPROGS_DATE);
753 /* Update our search path to include uncommon directories. */
755 fsck_path = malloc (strlen (fsck_prefix_path) + 1 +
756 strlen (oldpath) + 1);
757 strcpy (fsck_path, fsck_prefix_path);
758 strcat (fsck_path, ":");
759 strcat (fsck_path, oldpath);
761 fsck_path = strdup(oldpath);
764 /* If -A was specified ("check all"), do that! */
768 for (i = 0 ; i < num_devices; i++) {
769 fsck_device(devices[i]);
771 struct fsck_instance *inst;
775 status |= inst->exit_status;
780 status |= wait_all();