misc/fsck.c

   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  * Usage:       fsck [-ACVRNTM] [-s] [-t fstype] [fs-options] device
  12  *
  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.
  20  *
  21  * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999 Theodore Ts'o.
  22  *
  23  * %Begin-Header%
  24  * This file may be redistributed under the terms of the GNU Public
  25  * License.
  26  * %End-Header%
  27  */
  28
  29 #include <sys/types.h>
  30 #include <sys/wait.h>
  31 #include <sys/signal.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
  57 #include "../version.h"
  58 #include "nls-enable.h"
  59 #include "fsck.h"
  60 #include "blkid/blkid.h"
  61
  62 #ifndef _PATH_MNTTAB
  63 #define _PATH_MNTTAB    "/etc/fstab"
  64 #endif
  65
  66 static const char *ignored_types[] = {
  67         "ignore",
  68         "iso9660",
  69         "nfs",
  70         "proc",
  71         "sw",
  72         "swap",
  73         NULL
  74 };
  75
  76 static const char *really_wanted[] = {
  77         "minix",
  78         "ext2",
  79         "ext3",
  80         "xiafs",
  81         NULL
  82 };
  83
  84 #define BASE_MD "/dev/md"
  85
  86 /*
  87  * Global variables for options
  88  */
  89 char *devices[MAX_DEVICES];
  90 char *args[MAX_ARGS];
  91 int num_devices, num_args;
  92
  93 int verbose = 0;
  94 int doall = 0;
  95 int noexecute = 0;
  96 int serialize = 0;
  97 int skip_root = 0;
  98 int like_mount = 0;
  99 int notitle = 0;
 100 int parallel_root = 0;
 101 int progress = 0;
 102 int force_all_parallel = 0;
 103 int num_running = 0;
 104 int max_running = 0;
 105 volatile int cancel_requested = 0;
 106 int kill_sent = 0;
 107 char *progname;
 108 char *fstype = NULL;
 109 struct fs_info *filesys_info = NULL, *filesys_last = NULL;
 110 struct fsck_instance *instance_list;
 111 const char *fsck_prefix_path = "/sbin:/sbin/fs.d:/sbin/fs:/etc/fs:/etc";
 112 char *fsck_path = 0;
 113 blkid_cache cache = NULL;
 114
 115 static char *string_copy(const char *s)
 116 {
 117         char    *ret;
 118
 119         if (!s)
 120                 return 0;
 121         ret = malloc(strlen(s)+1);
 122         if (ret)
 123                 strcpy(ret, s);
 124         return ret;
 125 }
 126
 127 static int ignore(struct fs_info *);
 128
 129 static char *skip_over_blank(char *cp)
 130 {
 131         while (*cp && isspace(*cp))
 132                 cp++;
 133         return cp;
 134 }
 135
 136 static char *skip_over_word(char *cp)
 137 {
 138         while (*cp && !isspace(*cp))
 139                 cp++;
 140         return cp;
 141 }
 142
 143 static void strip_line(char *line)
 144 {
 145         char    *p;
 146
 147         while (*line) {
 148                 p = line + strlen(line) - 1;
 149                 if ((*p == '\n') || (*p == '\r'))
 150                         *p = 0;
 151                 else
 152                         break;
 153         }
 154 }
 155
 156 static char *parse_word(char **buf)
 157 {
 158         char *word, *next;
 159
 160         word = *buf;
 161         if (*word == 0)
 162                 return 0;
 163
 164         word = skip_over_blank(word);
 165         next = skip_over_word(word);
 166         if (*next)
 167                 *next++ = 0;
 168         *buf = next;
 169         return word;
 170 }
 171
 172 static void parse_escape(char *word)
 173 {
 174         char    *p, *q;
 175         int     ac, i;
 176
 177         if (!word)
 178                 return;
 179
 180         for (p = word, q = word; *p; p++, q++) {
 181                 *q = *p;
 182                 if (*p != '\\')
 183                         continue;
 184                 if (*++p == 0)
 185                         break;
 186                 if (*p == 't') {
 187                         *q = '\t';
 188                         continue;
 189                 }
 190                 if (*p == 'n') {
 191                         *q = '\n';
 192                         continue;
 193                 }
 194                 if (!isdigit(*p)) {
 195                         *q = *p;
 196                         continue;
 197                 }
 198                 ac = 0;
 199                 for (i = 0; i < 3; i++, p++) {
 200                         if (!isdigit(*p))
 201                                 break;
 202                         ac = (ac * 8) + (*p - '0');
 203                 }
 204                 *q = ac;
 205                 p--;
 206         }
 207         *q = 0;
 208 }
 209
 210 static void free_instance(struct fsck_instance *i)
 211 {
 212         if (i->prog)
 213                 free(i->prog);
 214         if (i->device)
 215                 free(i->device);
 216         if (i->base_device)
 217                 free(i->base_device);
 218         free(i);
 219         return;
 220 }
 221
 222 static struct fs_info *create_fs_device(char *device, char *mntpnt,
 223                                         char *type, char *opts, int freq,
 224                                         int passno)
 225 {
 226         struct fs_info *fs;
 227
 228         if (!(fs = malloc(sizeof(struct fs_info))))
 229                 return NULL;
 230
 231         fs->device = string_copy(device);
 232         fs->mountpt = string_copy(mntpnt);
 233         fs->type = string_copy(type);
 234         fs->opts = string_copy(opts ? opts : "");
 235         fs->freq = freq;
 236         fs->passno = passno;
 237         fs->flags = 0;
 238         fs->next = NULL;
 239
 240         if (!filesys_info)
 241                 filesys_info = fs;
 242         else
 243                 filesys_last->next = fs;
 244         filesys_last = fs;
 245
 246         return fs;
 247 }
 248
 249
 250
 251 static int parse_fstab_line(char *line, struct fs_info **ret_fs)
 252 {
 253         char    *dev, *device, *mntpnt, *type, *opts, *freq, *passno, *cp;
 254         char    *t = NULL;
 255         struct fs_info *fs;
 256
 257         *ret_fs = 0;
 258         strip_line(line);
 259         if ((cp = strchr(line, '#')))
 260                 *cp = 0;        /* Ignore everything after the comment char */
 261         cp = line;
 262
 263         device = parse_word(&cp);
 264         mntpnt = parse_word(&cp);
 265         type = parse_word(&cp);
 266         opts = parse_word(&cp);
 267         freq = parse_word(&cp);
 268         passno = parse_word(&cp);
 269
 270         if (!device)
 271                 return 0;       /* Allow blank lines */
 272
 273         if (!mntpnt || !type)
 274                 return -1;
 275
 276         parse_escape(device);
 277         parse_escape(mntpnt);
 278         parse_escape(type);
 279         parse_escape(opts);
 280         parse_escape(freq);
 281         parse_escape(passno);
 282
 283         dev = blkid_get_devname(cache, device, NULL);
 284         if (dev)
 285                 device = dev;
 286
 287         if (strcmp(type, "auto") == 0 || (strchr(type, ',') != 0))
 288                 t = blkid_get_tag_value(cache, "TYPE", device);
 289         if (t)
 290                 type = t;
 291
 292         fs = create_fs_device(device, mntpnt, type, opts,
 293                               freq ? atoi(freq) : -1,
 294                               passno ? atoi(passno) : -1);
 295         if (dev)
 296                 free(dev);
 297         if (t)
 298                 free(t);
 299
 300         if (!fs)
 301                 return -1;
 302         *ret_fs = fs;
 303         return 0;
 304 }
 305
 306 /*
 307  * Load the filesystem database from /etc/fstab
 308  */
 309 static void load_fs_info(const char *filename)
 310 {
 311         FILE    *f;
 312         char    buf[1024];
 313         int     lineno = 0;
 314         int     old_fstab = 1;
 315         struct fs_info *fs;
 316
 317         if ((f = fopen(filename, "r")) == NULL) {
 318                 fprintf(stderr, _("WARNING: couldn't open %s: %s\n"),
 319                         filename, strerror(errno));
 320                 return;
 321         }
 322         while (!feof(f)) {
 323                 lineno++;
 324                 if (!fgets(buf, sizeof(buf), f))
 325                         break;
 326                 buf[sizeof(buf)-1] = 0;
 327                 if (parse_fstab_line(buf, &fs) < 0) {
 328                         fprintf(stderr, _("WARNING: bad format "
 329                                 "on line %d of %s\n"), lineno, filename);
 330                         continue;
 331                 }
 332                 if (!fs)
 333                         continue;
 334                 if (fs->passno < 0)
 335                         fs->passno = 0;
 336                 else
 337                         old_fstab = 0;
 338         }
 339
 340         fclose(f);
 341
 342         if (old_fstab) {
 343                 fprintf(stderr, _("\007\007\007"
 344                 "WARNING: Your /etc/fstab does not contain the fsck passno\n"
 345                 "       field.  I will kludge around things for you, but you\n"
 346                 "       should fix your /etc/fstab file as soon as you can.\n\n"));
 347
 348                 for (fs = filesys_info; fs; fs = fs->next) {
 349                         fs->passno = 1;
 350                 }
 351         }
 352 }
 353
 354 /* Lookup filesys in /etc/fstab and return the corresponding entry. */
 355 static struct fs_info *lookup(char *filesys)
 356 {
 357         struct fs_info *fs;
 358         int     try_again = 0;
 359
 360         /* No filesys name given. */
 361         if (filesys == NULL)
 362                 return NULL;
 363
 364         for (fs = filesys_info; fs; fs = fs->next) {
 365                 if (!strcmp(filesys, fs->device) ||
 366                     (fs->mountpt && !strcmp(filesys, fs->mountpt)))
 367                         break;
 368         }
 369
 370         return fs;
 371 }
 372
 373 /* Find fsck program for a given fs type. */
 374 static char *find_fsck(char *type)
 375 {
 376   char *s;
 377   const char *tpl;
 378   static char prog[256];
 379   char *p = string_copy(fsck_path);
 380   struct stat st;
 381
 382   /* Are we looking for a program or just a type? */
 383   tpl = (strncmp(type, "fsck.", 5) ? "%s/fsck.%s" : "%s/%s");
 384
 385   for(s = strtok(p, ":"); s; s = strtok(NULL, ":")) {
 386         sprintf(prog, tpl, s, type);
 387         if (stat(prog, &st) == 0) break;
 388   }
 389   free(p);
 390   return(s ? prog : NULL);
 391 }
 392
 393 static int progress_active(NOARGS)
 394 {
 395         struct fsck_instance *inst;
 396
 397         for (inst = instance_list; inst; inst = inst->next) {
 398                 if (inst->flags & FLAG_DONE)
 399                         continue;
 400                 if (inst->flags & FLAG_PROGRESS)
 401                         return 1;
 402         }
 403         return 0;
 404 }
 405
 406 /*
 407  * Execute a particular fsck program, and link it into the list of
 408  * child processes we are waiting for.
 409  */
 410 static int execute(const char *type, const char *device, const char *mntpt,
 411                    int interactive)
 412 {
 413         char *s, *argv[80], prog[80];
 414         int  argc, i;
 415         struct fsck_instance *inst, *p;
 416         pid_t   pid;
 417
 418         inst = malloc(sizeof(struct fsck_instance));
 419         if (!inst)
 420                 return ENOMEM;
 421         memset(inst, 0, sizeof(struct fsck_instance));
 422
 423         sprintf(prog, "fsck.%s", type);
 424         argv[0] = string_copy(prog);
 425         argc = 1;
 426
 427         for (i=0; i <num_args; i++)
 428                 argv[argc++] = string_copy(args[i]);
 429
 430         if (progress & !progress_active()) {
 431                 if ((strcmp(type, "ext2") == 0) ||
 432                     (strcmp(type, "ext3") == 0)) {
 433                         argv[argc++] = string_copy("-C0");
 434                         inst->flags |= FLAG_PROGRESS;
 435                 }
 436         }
 437
 438         argv[argc++] = string_copy(device);
 439         argv[argc] = 0;
 440
 441         s = find_fsck(prog);
 442         if (s == NULL) {
 443                 fprintf(stderr, _("fsck: %s: not found\n"), prog);
 444                 return ENOENT;
 445         }
 446
 447         if (verbose || noexecute) {
 448                 printf("[%s (%d) -- %s] ", s, num_running,
 449                        mntpt ? mntpt : device);
 450                 for (i=0; i < argc; i++)
 451                         printf("%s ", argv[i]);
 452                 printf("\n");
 453         }
 454
 455         /* Fork and execute the correct program. */
 456         if (noexecute)
 457                 pid = -1;
 458         else if ((pid = fork()) < 0) {
 459                 perror("fork");
 460                 return errno;
 461         } else if (pid == 0) {
 462                 if (!interactive)
 463                         close(0);
 464                 (void) execv(s, argv);
 465                 perror(argv[0]);
 466                 exit(EXIT_ERROR);
 467         }
 468
 469         for (i=0; i < argc; i++)
 470                 free(argv[i]);
 471
 472         inst->pid = pid;
 473         inst->prog = string_copy(prog);
 474         inst->type = string_copy(type);
 475         inst->device = string_copy(device);
 476         inst->base_device = base_device(device);
 477         inst->start_time = time(0);
 478         inst->next = NULL;
 479
 480         /*
 481          * Find the end of the list, so we add the instance on at the end.
 482          */
 483         for (p = instance_list; p && p->next; p = p->next);
 484
 485         if (p)
 486                 p->next = inst;
 487         else
 488                 instance_list = inst;
 489
 490         return 0;
 491 }
 492
 493 /*
 494  * Send a signal to all outstanding fsck child processes
 495  */
 496 static int kill_all(int signum)
 497 {
 498         struct fsck_instance *inst;
 499         int     n = 0;
 500
 501         for (inst = instance_list; inst; inst = inst->next) {
 502                 if (inst->flags & FLAG_DONE)
 503                         continue;
 504                 kill(inst->pid, signum);
 505                 n++;
 506         }
 507         return n;
 508 }
 509
 510 /*
 511  * Wait for one child process to exit; when it does, unlink it from
 512  * the list of executing child processes, and return it.
 513  */
 514 static struct fsck_instance *wait_one(int flags)
 515 {
 516         int     status;
 517         int     sig;
 518         struct fsck_instance *inst, *inst2, *prev;
 519         pid_t   pid;
 520
 521         if (!instance_list)
 522                 return NULL;
 523
 524         if (noexecute) {
 525                 inst = instance_list;
 526                 prev = 0;
 527 #ifdef RANDOM_DEBUG
 528                 while (inst->next && (random() & 1)) {
 529                         prev = inst;
 530                         inst = inst->next;
 531                 }
 532 #endif
 533                 inst->exit_status = 0;
 534                 goto ret_inst;
 535         }
 536
 537         /*
 538          * gcc -Wall fails saving throw against stupidity
 539          * (inst and prev are thought to be uninitialized variables)
 540          */
 541         inst = prev = NULL;
 542
 543         do {
 544                 pid = waitpid(-1, &status, flags);
 545                 if (cancel_requested && !kill_sent) {
 546                         kill_all(SIGTERM);
 547                         kill_sent++;
 548                 }
 549                 if ((pid == 0) && (flags & WNOHANG))
 550                         return NULL;
 551                 if (pid < 0) {
 552                         if ((errno == EINTR) || (errno == EAGAIN))
 553                                 continue;
 554                         if (errno == ECHILD) {
 555                                 fprintf(stderr,
 556                                         _("%s: wait: No more child process?!?\n"),
 557                                         progname);
 558                                 return NULL;
 559                         }
 560                         perror("wait");
 561                         continue;
 562                 }
 563                 for (prev = 0, inst = instance_list;
 564                      inst;
 565                      prev = inst, inst = inst->next) {
 566                         if (inst->pid == pid)
 567                                 break;
 568                 }
 569         } while (!inst);
 570
 571         if (WIFEXITED(status))
 572                 status = WEXITSTATUS(status);
 573         else if (WIFSIGNALED(status)) {
 574                 sig = WTERMSIG(status);
 575                 if (sig == SIGINT) {
 576                         status = EXIT_UNCORRECTED;
 577                 } else {
 578                         printf(_("Warning... %s for device %s exited "
 579                                "with signal %d.\n"),
 580                                inst->prog, inst->device, sig);
 581                         status = EXIT_ERROR;
 582                 }
 583         } else {
 584                 printf(_("%s %s: status is %x, should never happen.\n"),
 585                        inst->prog, inst->device, status);
 586                 status = EXIT_ERROR;
 587         }
 588         inst->exit_status = status;
 589         if (progress && (inst->flags & FLAG_PROGRESS) &&
 590             !progress_active()) {
 591                 for (inst2 = instance_list; inst2; inst2 = inst2->next) {
 592                         if (inst2->flags & FLAG_DONE)
 593                                 continue;
 594                         if (strcmp(inst2->type, "ext2") &&
 595                             strcmp(inst2->type, "ext3"))
 596                                 continue;
 597                         /*
 598                          * If we've just started the fsck, wait a tiny
 599                          * bit before sending the kill, to give it
 600                          * time to set up the signal handler
 601                          */
 602                         if (inst2->start_time < time(0)+2) {
 603                                 if (fork() == 0) {
 604                                         sleep(1);
 605                                         kill(inst2->pid, SIGUSR1);
 606                                         exit(0);
 607                                 }
 608                         } else
 609                                 kill(inst2->pid, SIGUSR1);
 610                         inst2->flags |= FLAG_PROGRESS;
 611                         break;
 612                 }
 613         }
 614 ret_inst:
 615         if (prev)
 616                 prev->next = inst->next;
 617         else
 618                 instance_list = inst->next;
 619         if (verbose > 1)
 620                 printf(_("Finished with %s (exit status %d)\n"),
 621                        inst->device, inst->exit_status);
 622         num_running--;
 623         return inst;
 624 }
 625
 626 /*
 627  * Wait until all executing child processes have exited; return the
 628  * logical OR of all of their exit code values.
 629  */
 630 static int wait_all(int flags)
 631 {
 632         struct fsck_instance *inst;
 633         int     global_status = 0;
 634
 635         while ((inst = wait_one(flags))) {
 636                 global_status |= inst->exit_status;
 637                 free_instance(inst);
 638 #ifdef RANDOM_DEBUG
 639                 if (noexecute && (flags & WNOHANG) && !(random() % 3))
 640                         break;
 641 #endif
 642         }
 643         return global_status;
 644 }
 645
 646 /*
 647  * Run the fsck program on a particular device
 648  *
 649  * If the type is specified using -t, and it isn't prefixed with "no"
 650  * (as in "noext2") and only one filesystem type is specified, then
 651  * use that type regardless of what is specified in /etc/fstab.
 652  *
 653  * If the type isn't specified by the user, then use either the type
 654  * specified in /etc/fstab, or DEFAULT_FSTYPE.
 655  */
 656 static void fsck_device(struct fs_info *fs, int interactive)
 657 {
 658         const char *type = 0;
 659         int retval;
 660
 661         if (fstype && strncmp(fstype, "no", 2) &&
 662             strncmp(fstype, "opts=", 5) && strncmp(fstype, "loop", 4) &&
 663             !strchr(fstype, ','))
 664                 type = fstype;
 665
 666         type = fs->type ? fs->type : DEFAULT_FSTYPE;
 667
 668         num_running++;
 669         retval = execute(type, fs->device, fs->mountpt, interactive);
 670         if (retval) {
 671                 fprintf(stderr, _("%s: Error %d while executing fsck.%s "
 672                         "for %s\n"), progname, retval, type, fs->device);
 673                 num_running--;
 674         }
 675 }
 676
 677
 678 /*
 679  * Deal with the fsck -t argument.
 680  */
 681 struct fs_type_compile {
 682         char **list;
 683         int *type;
 684         int  negate;
 685 } fs_type_compiled;
 686
 687 #define FS_TYPE_NORMAL  0
 688 #define FS_TYPE_OPT     1
 689 #define FS_TYPE_NEGOPT  2
 690
 691 static const char *fs_type_syntax_error =
 692 N_("Either all or none of the filesystem types passed to -t must be prefixed\n"
 693    "with 'no' or '!'.\n");
 694
 695 static void compile_fs_type(char *fs_type, struct fs_type_compile *cmp)
 696 {
 697         char    *cp, *list, *s;
 698         int     num = 2;
 699         int     negate, first_negate = 1;
 700
 701         if (fs_type) {
 702                 for (cp=fs_type; *cp; cp++) {
 703                         if (*cp == ',')
 704                                 num++;
 705                 }
 706         }
 707
 708         cmp->list = malloc(num * sizeof(char *));
 709         cmp->type = malloc(num * sizeof(int));
 710         if (!cmp->list || !cmp->type) {
 711                 fprintf(stderr, _("Couldn't allocate memory for "
 712                                   "filesystem types\n"));
 713                 exit(EXIT_ERROR);
 714         }
 715         memset(cmp->list, 0, num * sizeof(char *));
 716         memset(cmp->type, 0, num * sizeof(int));
 717         cmp->negate = 0;
 718
 719         if (!fs_type)
 720                 return;
 721
 722         list = string_copy(fs_type);
 723         num = 0;
 724         s = strtok(list, ",");
 725         while(s) {
 726                 negate = 0;
 727                 if (strncmp(s, "no", 2) == 0) {
 728                         s += 2;
 729                         negate = 1;
 730                 } else if (*s == '!') {
 731                         s++;
 732                         negate = 1;
 733                 }
 734                 if (strcmp(s, "loop") == 0)
 735                         /* loop is really short-hand for opts=loop */
 736                         goto loop_special_case;
 737                 else if (strncmp(s, "opts=", 5) == 0) {
 738                         s += 5;
 739                 loop_special_case:
 740                         cmp->type[num] = negate ? FS_TYPE_NEGOPT : FS_TYPE_OPT;
 741                 } else {
 742                         if (first_negate) {
 743                                 cmp->negate = negate;
 744                                 first_negate = 0;
 745                         }
 746                         if ((negate && !cmp->negate) ||
 747                             (!negate && cmp->negate)) {
 748                                 fprintf(stderr, _(fs_type_syntax_error));
 749                                 exit(EXIT_USAGE);
 750                         }
 751                 }
 752 #if 0
 753                 printf("Adding %s to list (type %d).\n", s, cmp->type[num]);
 754 #endif
 755                 cmp->list[num++] = string_copy(s);
 756                 s = strtok(NULL, ",");
 757         }
 758         free(list);
 759 }
 760
 761 /*
 762  * This function returns true if a particular option appears in a
 763  * comma-delimited options list
 764  */
 765 static int opt_in_list(char *opt, char *optlist)
 766 {
 767         char    *list, *s;
 768
 769         if (!optlist)
 770                 return 0;
 771         list = string_copy(optlist);
 772
 773         s = strtok(list, ",");
 774         while(s) {
 775                 if (strcmp(s, opt) == 0) {
 776                         free(list);
 777                         return 1;
 778                 }
 779                 s = strtok(NULL, ",");
 780         }
 781         free(list);
 782         return 0;
 783 }
 784
 785 /* See if the filesystem matches the criteria given by the -t option */
 786 static int fs_match(struct fs_info *fs, struct fs_type_compile *cmp)
 787 {
 788         int n, ret = 0, checked_type = 0;
 789         char *cp;
 790
 791         if (cmp->list == 0 || cmp->list[0] == 0)
 792                 return 1;
 793
 794         for (n=0; (cp = cmp->list[n]); n++) {
 795                 switch (cmp->type[n]) {
 796                 case FS_TYPE_NORMAL:
 797                         checked_type++;
 798                         if (strcmp(cp, fs->type) == 0) {
 799                                 ret = 1;
 800                         }
 801                         break;
 802                 case FS_TYPE_NEGOPT:
 803                         if (opt_in_list(cp, fs->opts))
 804                                 return 0;
 805                         break;
 806                 case FS_TYPE_OPT:
 807                         if (!opt_in_list(cp, fs->opts))
 808                                 return 0;
 809                         break;
 810                 }
 811         }
 812         if (checked_type == 0)
 813                 return 1;
 814         return (cmp->negate ? !ret : ret);
 815 }
 816
 817 /* Check if we should ignore this filesystem. */
 818 static int ignore(struct fs_info *fs)
 819 {
 820         const char **ip;
 821         int wanted = 0;
 822
 823         /*
 824          * If the pass number is 0, ignore it.
 825          */
 826         if (fs->passno == 0)
 827                 return 1;
 828
 829         /*
 830          * If a specific fstype is specified, and it doesn't match,
 831          * ignore it.
 832          */
 833         if (!fs_match(fs, &fs_type_compiled)) return 1;
 834
 835         /* Are we ignoring this type? */
 836         for(ip = ignored_types; *ip; ip++)
 837                 if (strcmp(fs->type, *ip) == 0) return 1;
 838
 839         /* Do we really really want to check this fs? */
 840         for(ip = really_wanted; *ip; ip++)
 841                 if (strcmp(fs->type, *ip) == 0) {
 842                         wanted = 1;
 843                         break;
 844                 }
 845
 846         /* See if the <fsck.fs> program is available. */
 847         if (find_fsck(fs->type) == NULL) {
 848                 if (wanted)
 849                         fprintf(stderr, _("fsck: cannot check %s: fsck.%s not found\n"),
 850                                 fs->device, fs->type);
 851                 return 1;
 852         }
 853
 854         /* We can and want to check this file system type. */
 855         return 0;
 856 }
 857
 858 /*
 859  * Returns TRUE if a partition on the same disk is already being
 860  * checked.
 861  */
 862 static int device_already_active(char *device)
 863 {
 864         struct fsck_instance *inst;
 865         char *base;
 866
 867         if (force_all_parallel)
 868                 return 0;
 869
 870 #ifdef BASE_MD
 871         /* Don't check a soft raid disk with any other disk */
 872         if (instance_list &&
 873             (!strncmp(instance_list->device, BASE_MD, sizeof(BASE_MD)-1) ||
 874              !strncmp(device, BASE_MD, sizeof(BASE_MD)-1)))
 875                 return 1;
 876 #endif
 877
 878         base = base_device(device);
 879         /*
 880          * If we don't know the base device, assume that the device is
 881          * already active if there are any fsck instances running.
 882          */
 883         if (!base)
 884                 return (instance_list != 0);
 885         for (inst = instance_list; inst; inst = inst->next) {
 886                 if (!inst->base_device || !strcmp(base, inst->base_device)) {
 887                         free(base);
 888                         return 1;
 889                 }
 890         }
 891         free(base);
 892         return 0;
 893 }
 894
 895 /* Check all file systems, using the /etc/fstab table. */
 896 static int check_all(NOARGS)
 897 {
 898         struct fs_info *fs = NULL;
 899         int status = EXIT_OK;
 900         int not_done_yet = 1;
 901         int passno = 1;
 902         int pass_done;
 903
 904         if (verbose)
 905                 printf(_("Checking all file systems.\n"));
 906
 907         /*
 908          * Do an initial scan over the filesystem; mark filesystems
 909          * which should be ignored as done, and resolve LABEL= and
 910          * UUID= specifications to the real device.
 911          */
 912         for (fs = filesys_info; fs; fs = fs->next) {
 913                 if (ignore(fs))
 914                         fs->flags |= FLAG_DONE;
 915         }
 916
 917         /*
 918          * Find and check the root filesystem.
 919          */
 920         if (!parallel_root) {
 921                 for (fs = filesys_info; fs; fs = fs->next) {
 922                         if (!strcmp(fs->mountpt, "/"))
 923                                 break;
 924                 }
 925                 if (fs) {
 926                         if (!skip_root && !ignore(fs)) {
 927                                 fsck_device(fs, 1);
 928                                 status |= wait_all(0);
 929                                 if (status > EXIT_NONDESTRUCT)
 930                                         return status;
 931                         }
 932                         fs->flags |= FLAG_DONE;
 933                 }
 934         }
 935         /*
 936          * This is for the bone-headed user who enters the root
 937          * filesystem twice.  Skip root will skep all root entries.
 938          */
 939         if (skip_root)
 940                 for (fs = filesys_info; fs; fs = fs->next)
 941                         if (!strcmp(fs->mountpt, "/"))
 942                                 fs->flags |= FLAG_DONE;
 943
 944         while (not_done_yet) {
 945                 not_done_yet = 0;
 946                 pass_done = 1;
 947
 948                 for (fs = filesys_info; fs; fs = fs->next) {
 949                         if (cancel_requested)
 950                                 break;
 951                         if (fs->flags & FLAG_DONE)
 952                                 continue;
 953                         /*
 954                          * If the filesystem's pass number is higher
 955                          * than the current pass number, then we don't
 956                          * do it yet.
 957                          */
 958                         if (fs->passno > passno) {
 959                                 not_done_yet++;
 960                                 continue;
 961                         }
 962                         /*
 963                          * If a filesystem on a particular device has
 964                          * already been spawned, then we need to defer
 965                          * this to another pass.
 966                          */
 967                         if (device_already_active(fs->device)) {
 968                                 pass_done = 0;
 969                                 continue;
 970                         }
 971                         /*
 972                          * Spawn off the fsck process
 973                          */
 974                         fsck_device(fs, serialize);
 975                         fs->flags |= FLAG_DONE;
 976
 977                         /*
 978                          * Only do one filesystem at a time, or if we
 979                          * have a limit on the number of fsck's extant
 980                          * at one time, apply that limit.
 981                          */
 982                         if (serialize ||
 983                             (max_running && (num_running >= max_running))) {
 984                                 pass_done = 0;
 985                                 break;
 986                         }
 987                 }
 988                 if (cancel_requested)
 989                         break;
 990                 if (verbose > 1)
 991                         printf(_("--waiting-- (pass %d)\n"), passno);
 992                 status |= wait_all(pass_done ? 0 : WNOHANG);
 993                 if (pass_done) {
 994                         if (verbose > 1)
 995                                 printf("----------------------------------\n");
 996                         passno++;
 997                 } else
 998                         not_done_yet++;
 999         }
1000         if (cancel_requested && !kill_sent) {
1001                 kill_all(SIGTERM);
1002                 kill_sent++;
1003         }
1004         status |= wait_all(0);
1005         return status;
1006 }
1007
1008 static void usage(NOARGS)
1009 {
1010         fprintf(stderr,
1011                 _("Usage: fsck [-ACNPRTV] [-t fstype] [fs-options] [filesys ...]\n"));
1012         exit(EXIT_USAGE);
1013 }
1014
1015 #ifdef HAVE_SIGNAL_H
1016 static void signal_cancel(int sig)
1017 {
1018         cancel_requested++;
1019 }
1020 #endif
1021
1022 static void PRS(int argc, char *argv[])
1023 {
1024         int     i, j;
1025         char    *arg, *dev, *tmp = 0;
1026         char    options[128];
1027         int     opt = 0;
1028         int     opts_for_fsck = 0;
1029 #ifdef HAVE_SIGNAL_H
1030         struct sigaction        sa;
1031
1032         /*
1033          * Set up signal action
1034          */
1035         memset(&sa, 0, sizeof(struct sigaction));
1036         sa.sa_handler = signal_cancel;
1037         sigaction(SIGINT, &sa, 0);
1038         sigaction(SIGTERM, &sa, 0);
1039 #endif
1040
1041         num_devices = 0;
1042         num_args = 0;
1043         instance_list = 0;
1044
1045         progname = argv[0];
1046
1047         for (i=1; i < argc; i++) {
1048                 arg = argv[i];
1049                 if (!arg)
1050                         continue;
1051                 if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) {
1052                         if (num_devices >= MAX_DEVICES) {
1053                                 fprintf(stderr, _("%s: too many devices\n"),
1054                                         progname);
1055                                 exit(EXIT_ERROR);
1056                         }
1057                         dev = blkid_get_devname(cache, arg, NULL);
1058                         if (!dev && strchr(arg, '=')) {
1059                                 /*
1060                                  * Check to see if we failed because
1061                                  * /proc/partitions isn't found.
1062                                  */
1063                                 if (access("/proc/partitions", R_OK) < 0) {
1064                                         fprintf(stderr, "Couldn't open /proc/partitions: %s\n",
1065                                                 strerror(errno));
1066                                         fprintf(stderr, "Is /proc mounted?\n");
1067                                         exit(EXIT_ERROR);
1068                                 }
1069                                 /*
1070                                  * Check to see if this is because
1071                                  * we're not running as root
1072                                  */
1073                                 if (geteuid())
1074                                         fprintf(stderr,
1075                 "Must be root to scan for matching filesystems: %s\n", arg);
1076                                 else
1077                                         fprintf(stderr,
1078                 "Couldn't find matching filesystem: %s\n", arg);
1079                                 exit(EXIT_ERROR);
1080                         }
1081                         devices[num_devices++] = dev ? dev : string_copy(arg);
1082                         continue;
1083                 }
1084                 if (arg[0] != '-' || opts_for_fsck) {
1085                         if (num_args >= MAX_ARGS) {
1086                                 fprintf(stderr, _("%s: too many arguments\n"),
1087                                         progname);
1088                                 exit(EXIT_ERROR);
1089                         }
1090                         args[num_args++] = string_copy(arg);
1091                         continue;
1092                 }
1093                 for (j=1; arg[j]; j++) {
1094                         if (opts_for_fsck) {
1095                                 options[++opt] = arg[j];
1096                                 continue;
1097                         }
1098                         switch (arg[j]) {
1099                         case 'A':
1100                                 doall++;
1101                                 break;
1102                         case 'C':
1103                                 progress++;
1104                                 break;
1105                         case 'V':
1106                                 verbose++;
1107                                 break;
1108                         case 'N':
1109                                 noexecute++;
1110                                 break;
1111                         case 'R':
1112                                 skip_root++;
1113                                 break;
1114                         case 'T':
1115                                 notitle++;
1116                                 break;
1117                         case 'M':
1118                                 like_mount++;
1119                                 break;
1120                         case 'P':
1121                                 parallel_root++;
1122                                 break;
1123                         case 's':
1124                                 serialize++;
1125                                 break;
1126                         case 't':
1127                                 if (fstype)
1128                                         usage();
1129                                 if (arg[j+1])
1130                                         tmp = arg+j+1;
1131                                 else if ((i+1) < argc)
1132                                         tmp = argv[++i];
1133                                 else
1134                                         usage();
1135                                 fstype = string_copy(tmp);
1136                                 compile_fs_type(fstype, &fs_type_compiled);
1137                                 goto next_arg;
1138                         case '-':
1139                                 opts_for_fsck++;
1140                                 break;
1141                         case '?':
1142                                 usage();
1143                                 break;
1144                         default:
1145                                 options[++opt] = arg[j];
1146                                 break;
1147                         }
1148                 }
1149         next_arg:
1150                 if (opt) {
1151                         options[0] = '-';
1152                         options[++opt] = '\0';
1153                         if (num_args >= MAX_ARGS) {
1154                                 fprintf(stderr,
1155                                         _("%s: too many arguments\n"),
1156                                         progname);
1157                                 exit(EXIT_ERROR);
1158                         }
1159                         args[num_args++] = string_copy(options);
1160                         opt = 0;
1161                 }
1162         }
1163         if (getenv("FSCK_FORCE_ALL_PARALLEL"))
1164                 force_all_parallel++;
1165         if ((tmp = getenv("FSCK_MAX_INST")))
1166             max_running = atoi(tmp);
1167 }
1168
1169 int main(int argc, char *argv[])
1170 {
1171         int i, status = 0;
1172         int interactive = 0;
1173         char *type, *oldpath = getenv("PATH");
1174         const char *fstab;
1175         struct fs_info *fs;
1176
1177 #ifdef ENABLE_NLS
1178         setlocale(LC_MESSAGES, "");
1179         setlocale(LC_CTYPE, "");
1180         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1181         textdomain(NLS_CAT_NAME);
1182 #endif
1183         blkid_get_cache(&cache, NULL);
1184         PRS(argc, argv);
1185
1186         if (!notitle)
1187                 printf("fsck %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1188
1189         fstab = getenv("FSTAB_FILE");
1190         if (!fstab)
1191                 fstab = _PATH_MNTTAB;
1192         load_fs_info(fstab);
1193
1194         /* Update our search path to include uncommon directories. */
1195         if (oldpath) {
1196                 fsck_path = malloc (strlen (fsck_prefix_path) + 1 +
1197                                     strlen (oldpath) + 1);
1198                 strcpy (fsck_path, fsck_prefix_path);
1199                 strcat (fsck_path, ":");
1200                 strcat (fsck_path, oldpath);
1201         } else {
1202                 fsck_path = string_copy(fsck_prefix_path);
1203         }
1204
1205         if ((num_devices == 1) || (serialize))
1206                 interactive = 1;
1207
1208         /* If -A was specified ("check all"), do that! */
1209         if (doall)
1210                 return check_all();
1211
1212         if (num_devices == 0) {
1213                 serialize++;
1214                 interactive++;
1215                 return check_all();
1216         }
1217         for (i = 0 ; i < num_devices; i++) {
1218                 if (cancel_requested) {
1219                         if (!kill_sent) {
1220                                 kill_all(SIGTERM);
1221                                 kill_sent++;
1222                         }
1223                         break;
1224                 }
1225                 fs = lookup(devices[i]);
1226                 if (!fs) {
1227                         type = blkid_get_tag_value(cache, "TYPE", devices[i]);
1228                         if (!type) {
1229                                 fprintf(stderr, _("Could not determine "
1230                                                   "filesystem type for %s\n"),
1231                                         devices[i]);
1232                                 continue;
1233                         }
1234                         fs = create_fs_device(devices[i], 0, type, 0, -1, -1);
1235                         free(type);
1236                         if (!fs)
1237                                 continue;
1238                 }
1239                 fsck_device(fs, interactive);
1240                 if (serialize ||
1241                     (max_running && (num_running >= max_running))) {
1242                         struct fsck_instance *inst;
1243
1244                         inst = wait_one(0);
1245                         if (inst) {
1246                                 status |= inst->exit_status;
1247                                 free_instance(inst);
1248                         }
1249                         if (verbose > 1)
1250                                 printf("----------------------------------\n");
1251                 }
1252         }
1253         status |= wait_all(0);
1254         free(fsck_path);
1255         blkid_put_cache(cache);
1256         return status;
1257 }