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         "tmpfs",
  74         "devpts",
  75         NULL
  76 };
  77
  78 static const char *really_wanted[] = {
  79         "minix",
  80         "ext2",
  81         "ext3",
  82         "jfs",
  83         "reiserfs",
  84         "xiafs",
  85         "xfs",
  86         NULL
  87 };
  88
  89 #define BASE_MD "/dev/md"
  90
  91 /*
  92  * Global variables for options
  93  */
  94 char *devices[MAX_DEVICES];
  95 char *args[MAX_ARGS];
  96 int num_devices, num_args;
  97
  98 int verbose = 0;
  99 int doall = 0;
 100 int noexecute = 0;
 101 int serialize = 0;
 102 int skip_root = 0;
 103 int like_mount = 0;
 104 int notitle = 0;
 105 int parallel_root = 0;
 106 int progress = 0;
 107 int force_all_parallel = 0;
 108 int num_running = 0;
 109 int max_running = 0;
 110 volatile int cancel_requested = 0;
 111 int kill_sent = 0;
 112 char *progname;
 113 char *fstype = NULL;
 114 struct fs_info *filesys_info = NULL, *filesys_last = NULL;
 115 struct fsck_instance *instance_list;
 116 const char *fsck_prefix_path = "/sbin:/sbin/fs.d:/sbin/fs:/etc/fs:/etc";
 117 char *fsck_path = 0;
 118 blkid_cache cache = NULL;
 119
 120 static char *string_copy(const char *s)
 121 {
 122         char    *ret;
 123
 124         if (!s)
 125                 return 0;
 126         ret = malloc(strlen(s)+1);
 127         if (ret)
 128                 strcpy(ret, s);
 129         return ret;
 130 }
 131
 132 static int ignore(struct fs_info *);
 133
 134 static char *skip_over_blank(char *cp)
 135 {
 136         while (*cp && isspace(*cp))
 137                 cp++;
 138         return cp;
 139 }
 140
 141 static char *skip_over_word(char *cp)
 142 {
 143         while (*cp && !isspace(*cp))
 144                 cp++;
 145         return cp;
 146 }
 147
 148 static void strip_line(char *line)
 149 {
 150         char    *p;
 151
 152         while (*line) {
 153                 p = line + strlen(line) - 1;
 154                 if ((*p == '\n') || (*p == '\r'))
 155                         *p = 0;
 156                 else
 157                         break;
 158         }
 159 }
 160
 161 static char *parse_word(char **buf)
 162 {
 163         char *word, *next;
 164
 165         word = *buf;
 166         if (*word == 0)
 167                 return 0;
 168
 169         word = skip_over_blank(word);
 170         next = skip_over_word(word);
 171         if (*next)
 172                 *next++ = 0;
 173         *buf = next;
 174         return word;
 175 }
 176
 177 static void parse_escape(char *word)
 178 {
 179         char    *p, *q;
 180         int     ac, i;
 181
 182         if (!word)
 183                 return;
 184
 185         for (p = word, q = word; *p; p++, q++) {
 186                 *q = *p;
 187                 if (*p != '\\')
 188                         continue;
 189                 if (*++p == 0)
 190                         break;
 191                 if (*p == 't') {
 192                         *q = '\t';
 193                         continue;
 194                 }
 195                 if (*p == 'n') {
 196                         *q = '\n';
 197                         continue;
 198                 }
 199                 if (!isdigit(*p)) {
 200                         *q = *p;
 201                         continue;
 202                 }
 203                 ac = 0;
 204                 for (i = 0; i < 3; i++, p++) {
 205                         if (!isdigit(*p))
 206                                 break;
 207                         ac = (ac * 8) + (*p - '0');
 208                 }
 209                 *q = ac;
 210                 p--;
 211         }
 212         *q = 0;
 213 }
 214
 215 static void free_instance(struct fsck_instance *i)
 216 {
 217         if (i->prog)
 218                 free(i->prog);
 219         if (i->device)
 220                 free(i->device);
 221         if (i->base_device)
 222                 free(i->base_device);
 223         free(i);
 224         return;
 225 }
 226
 227 static struct fs_info *create_fs_device(const char *device, const char *mntpnt,
 228                                         const char *type, const char *opts,
 229                                         int freq, int passno)
 230 {
 231         struct fs_info *fs;
 232
 233         if (!(fs = malloc(sizeof(struct fs_info))))
 234                 return NULL;
 235
 236         fs->device = string_copy(device);
 237         fs->mountpt = string_copy(mntpnt);
 238         fs->type = string_copy(type);
 239         fs->opts = string_copy(opts ? opts : "");
 240         fs->freq = freq;
 241         fs->passno = passno;
 242         fs->flags = 0;
 243         fs->next = NULL;
 244
 245         if (!filesys_info)
 246                 filesys_info = fs;
 247         else
 248                 filesys_last->next = fs;
 249         filesys_last = fs;
 250
 251         return fs;
 252 }
 253
 254
 255
 256 static int parse_fstab_line(char *line, struct fs_info **ret_fs)
 257 {
 258         char    *dev, *device, *mntpnt, *type, *opts, *freq, *passno, *cp;
 259         struct fs_info *fs;
 260
 261         *ret_fs = 0;
 262         strip_line(line);
 263         if ((cp = strchr(line, '#')))
 264                 *cp = 0;        /* Ignore everything after the comment char */
 265         cp = line;
 266
 267         device = parse_word(&cp);
 268         mntpnt = parse_word(&cp);
 269         type = parse_word(&cp);
 270         opts = parse_word(&cp);
 271         freq = parse_word(&cp);
 272         passno = parse_word(&cp);
 273
 274         if (!device)
 275                 return 0;       /* Allow blank lines */
 276
 277         if (!mntpnt || !type)
 278                 return -1;
 279
 280         parse_escape(device);
 281         parse_escape(mntpnt);
 282         parse_escape(type);
 283         parse_escape(opts);
 284         parse_escape(freq);
 285         parse_escape(passno);
 286
 287         dev = blkid_get_devname(cache, device, NULL);
 288         if (dev)
 289                 device = dev;
 290
 291         if (strchr(type, ','))
 292                 type = 0;
 293
 294         fs = create_fs_device(device, mntpnt, type ? type : "auto", opts,
 295                               freq ? atoi(freq) : -1,
 296                               passno ? atoi(passno) : -1);
 297         if (dev)
 298                 free(dev);
 299
 300         if (!fs)
 301                 return -1;
 302         *ret_fs = fs;
 303         return 0;
 304 }
 305
 306 static void interpret_type(struct fs_info *fs)
 307 {
 308         char    *t;
 309
 310         if (strcmp(fs->type, "auto") != 0)
 311                 return;
 312         t = blkid_get_tag_value(cache, "TYPE", fs->device);
 313         if (t) {
 314                 free(fs->type);
 315                 fs->type = t;
 316         }
 317 }
 318
 319 /*
 320  * Load the filesystem database from /etc/fstab
 321  */
 322 static void load_fs_info(const char *filename)
 323 {
 324         FILE    *f;
 325         char    buf[1024];
 326         int     lineno = 0;
 327         int     old_fstab = 1;
 328         struct fs_info *fs;
 329
 330         if ((f = fopen(filename, "r")) == NULL) {
 331                 fprintf(stderr, _("WARNING: couldn't open %s: %s\n"),
 332                         filename, strerror(errno));
 333                 return;
 334         }
 335         while (!feof(f)) {
 336                 lineno++;
 337                 if (!fgets(buf, sizeof(buf), f))
 338                         break;
 339                 buf[sizeof(buf)-1] = 0;
 340                 if (parse_fstab_line(buf, &fs) < 0) {
 341                         fprintf(stderr, _("WARNING: bad format "
 342                                 "on line %d of %s\n"), lineno, filename);
 343                         continue;
 344                 }
 345                 if (!fs)
 346                         continue;
 347                 if (fs->passno < 0)
 348                         fs->passno = 0;
 349                 else
 350                         old_fstab = 0;
 351         }
 352
 353         fclose(f);
 354
 355         if (old_fstab) {
 356                 fputs(_("\007\007\007"
 357                 "WARNING: Your /etc/fstab does not contain the fsck passno\n"
 358                 "       field.  I will kludge around things for you, but you\n"
 359                 "       should fix your /etc/fstab file as soon as you can.\n\n"), stderr);
 360
 361                 for (fs = filesys_info; fs; fs = fs->next) {
 362                         fs->passno = 1;
 363                 }
 364         }
 365 }
 366
 367 /* Lookup filesys in /etc/fstab and return the corresponding entry. */
 368 static struct fs_info *lookup(char *filesys)
 369 {
 370         struct fs_info *fs;
 371
 372         /* No filesys name given. */
 373         if (filesys == NULL)
 374                 return NULL;
 375
 376         for (fs = filesys_info; fs; fs = fs->next) {
 377                 if (!strcmp(filesys, fs->device) ||
 378                     (fs->mountpt && !strcmp(filesys, fs->mountpt)))
 379                         break;
 380         }
 381
 382         return fs;
 383 }
 384
 385 /* Find fsck program for a given fs type. */
 386 static char *find_fsck(char *type)
 387 {
 388   char *s;
 389   const char *tpl;
 390   static char prog[256];
 391   char *p = string_copy(fsck_path);
 392   struct stat st;
 393
 394   /* Are we looking for a program or just a type? */
 395   tpl = (strncmp(type, "fsck.", 5) ? "%s/fsck.%s" : "%s/%s");
 396
 397   for(s = strtok(p, ":"); s; s = strtok(NULL, ":")) {
 398         sprintf(prog, tpl, s, type);
 399         if (stat(prog, &st) == 0) break;
 400   }
 401   free(p);
 402   return(s ? prog : NULL);
 403 }
 404
 405 static int progress_active(NOARGS)
 406 {
 407         struct fsck_instance *inst;
 408
 409         for (inst = instance_list; inst; inst = inst->next) {
 410                 if (inst->flags & FLAG_DONE)
 411                         continue;
 412                 if (inst->flags & FLAG_PROGRESS)
 413                         return 1;
 414         }
 415         return 0;
 416 }
 417
 418 /*
 419  * Execute a particular fsck program, and link it into the list of
 420  * child processes we are waiting for.
 421  */
 422 static int execute(const char *type, const char *device, const char *mntpt,
 423                    int interactive)
 424 {
 425         char *s, *argv[80], prog[80];
 426         int  argc, i;
 427         struct fsck_instance *inst, *p;
 428         pid_t   pid;
 429
 430         inst = malloc(sizeof(struct fsck_instance));
 431         if (!inst)
 432                 return ENOMEM;
 433         memset(inst, 0, sizeof(struct fsck_instance));
 434
 435         sprintf(prog, "fsck.%s", type);
 436         argv[0] = string_copy(prog);
 437         argc = 1;
 438
 439         for (i=0; i <num_args; i++)
 440                 argv[argc++] = string_copy(args[i]);
 441
 442         if (progress && !progress_active()) {
 443                 if ((strcmp(type, "ext2") == 0) ||
 444                     (strcmp(type, "ext3") == 0)) {
 445                         argv[argc++] = string_copy("-C0");
 446                         inst->flags |= FLAG_PROGRESS;
 447                 }
 448         }
 449
 450         argv[argc++] = string_copy(device);
 451         argv[argc] = 0;
 452
 453         s = find_fsck(prog);
 454         if (s == NULL) {
 455                 fprintf(stderr, _("fsck: %s: not found\n"), prog);
 456                 return ENOENT;
 457         }
 458
 459         if (verbose || noexecute) {
 460                 printf("[%s (%d) -- %s] ", s, num_running,
 461                        mntpt ? mntpt : device);
 462                 for (i=0; i < argc; i++)
 463                         printf("%s ", argv[i]);
 464                 printf("\n");
 465         }
 466
 467         /* Fork and execute the correct program. */
 468         if (noexecute)
 469                 pid = -1;
 470         else if ((pid = fork()) < 0) {
 471                 perror("fork");
 472                 return errno;
 473         } else if (pid == 0) {
 474                 if (!interactive)
 475                         close(0);
 476                 (void) execv(s, argv);
 477                 perror(argv[0]);
 478                 exit(EXIT_ERROR);
 479         }
 480
 481         for (i=0; i < argc; i++)
 482                 free(argv[i]);
 483
 484         inst->pid = pid;
 485         inst->prog = string_copy(prog);
 486         inst->type = string_copy(type);
 487         inst->device = string_copy(device);
 488         inst->base_device = base_device(device);
 489         inst->start_time = time(0);
 490         inst->next = NULL;
 491
 492         /*
 493          * Find the end of the list, so we add the instance on at the end.
 494          */
 495         for (p = instance_list; p && p->next; p = p->next);
 496
 497         if (p)
 498                 p->next = inst;
 499         else
 500                 instance_list = inst;
 501
 502         return 0;
 503 }
 504
 505 /*
 506  * Send a signal to all outstanding fsck child processes
 507  */
 508 static int kill_all(int signum)
 509 {
 510         struct fsck_instance *inst;
 511         int     n = 0;
 512
 513         for (inst = instance_list; inst; inst = inst->next) {
 514                 if (inst->flags & FLAG_DONE)
 515                         continue;
 516                 kill(inst->pid, signum);
 517                 n++;
 518         }
 519         return n;
 520 }
 521
 522 /*
 523  * Wait for one child process to exit; when it does, unlink it from
 524  * the list of executing child processes, and return it.
 525  */
 526 static struct fsck_instance *wait_one(int flags)
 527 {
 528         int     status;
 529         int     sig;
 530         struct fsck_instance *inst, *inst2, *prev;
 531         pid_t   pid;
 532
 533         if (!instance_list)
 534                 return NULL;
 535
 536         if (noexecute) {
 537                 inst = instance_list;
 538                 prev = 0;
 539 #ifdef RANDOM_DEBUG
 540                 while (inst->next && (random() & 1)) {
 541                         prev = inst;
 542                         inst = inst->next;
 543                 }
 544 #endif
 545                 inst->exit_status = 0;
 546                 goto ret_inst;
 547         }
 548
 549         /*
 550          * gcc -Wall fails saving throw against stupidity
 551          * (inst and prev are thought to be uninitialized variables)
 552          */
 553         inst = prev = NULL;
 554
 555         do {
 556                 pid = waitpid(-1, &status, flags);
 557                 if (cancel_requested && !kill_sent) {
 558                         kill_all(SIGTERM);
 559                         kill_sent++;
 560                 }
 561                 if ((pid == 0) && (flags & WNOHANG))
 562                         return NULL;
 563                 if (pid < 0) {
 564                         if ((errno == EINTR) || (errno == EAGAIN))
 565                                 continue;
 566                         if (errno == ECHILD) {
 567                                 fprintf(stderr,
 568                                         _("%s: wait: No more child process?!?\n"),
 569                                         progname);
 570                                 return NULL;
 571                         }
 572                         perror("wait");
 573                         continue;
 574                 }
 575                 for (prev = 0, inst = instance_list;
 576                      inst;
 577                      prev = inst, inst = inst->next) {
 578                         if (inst->pid == pid)
 579                                 break;
 580                 }
 581         } while (!inst);
 582
 583         if (WIFEXITED(status))
 584                 status = WEXITSTATUS(status);
 585         else if (WIFSIGNALED(status)) {
 586                 sig = WTERMSIG(status);
 587                 if (sig == SIGINT) {
 588                         status = EXIT_UNCORRECTED;
 589                 } else {
 590                         printf(_("Warning... %s for device %s exited "
 591                                "with signal %d.\n"),
 592                                inst->prog, inst->device, sig);
 593                         status = EXIT_ERROR;
 594                 }
 595         } else {
 596                 printf(_("%s %s: status is %x, should never happen.\n"),
 597                        inst->prog, inst->device, status);
 598                 status = EXIT_ERROR;
 599         }
 600         inst->exit_status = status;
 601         if (progress && (inst->flags & FLAG_PROGRESS) &&
 602             !progress_active()) {
 603                 for (inst2 = instance_list; inst2; inst2 = inst2->next) {
 604                         if (inst2->flags & FLAG_DONE)
 605                                 continue;
 606                         if (strcmp(inst2->type, "ext2") &&
 607                             strcmp(inst2->type, "ext3"))
 608                                 continue;
 609                         /*
 610                          * If we've just started the fsck, wait a tiny
 611                          * bit before sending the kill, to give it
 612                          * time to set up the signal handler
 613                          */
 614                         if (inst2->start_time < time(0)+2) {
 615                                 if (fork() == 0) {
 616                                         sleep(1);
 617                                         kill(inst2->pid, SIGUSR1);
 618                                         exit(0);
 619                                 }
 620                         } else
 621                                 kill(inst2->pid, SIGUSR1);
 622                         inst2->flags |= FLAG_PROGRESS;
 623                         break;
 624                 }
 625         }
 626 ret_inst:
 627         if (prev)
 628                 prev->next = inst->next;
 629         else
 630                 instance_list = inst->next;
 631         if (verbose > 1)
 632                 printf(_("Finished with %s (exit status %d)\n"),
 633                        inst->device, inst->exit_status);
 634         num_running--;
 635         return inst;
 636 }
 637
 638 #define FLAG_WAIT_ALL           0
 639 #define FLAG_WAIT_ATLEAST_ONE   1
 640 /*
 641  * Wait until all executing child processes have exited; return the
 642  * logical OR of all of their exit code values.
 643  */
 644 static int wait_many(int flags)
 645 {
 646         struct fsck_instance *inst;
 647         int     global_status = 0;
 648         int     wait_flags = 0;
 649
 650         while ((inst = wait_one(wait_flags))) {
 651                 global_status |= inst->exit_status;
 652                 free_instance(inst);
 653 #ifdef RANDOM_DEBUG
 654                 if (noexecute && (flags & WNOHANG) && !(random() % 3))
 655                         break;
 656 #endif
 657                 if (flags & FLAG_WAIT_ATLEAST_ONE)
 658                         wait_flags = WNOHANG;
 659         }
 660         return global_status;
 661 }
 662
 663 /*
 664  * Run the fsck program on a particular device
 665  *
 666  * If the type is specified using -t, and it isn't prefixed with "no"
 667  * (as in "noext2") and only one filesystem type is specified, then
 668  * use that type regardless of what is specified in /etc/fstab.
 669  *
 670  * If the type isn't specified by the user, then use either the type
 671  * specified in /etc/fstab, or DEFAULT_FSTYPE.
 672  */
 673 static void fsck_device(struct fs_info *fs, int interactive)
 674 {
 675         const char *type;
 676         int retval;
 677
 678         interpret_type(fs);
 679
 680         if (strcmp(fs->type, "auto") != 0)
 681                 type = fs->type;
 682         else if (fstype && strncmp(fstype, "no", 2) &&
 683             strncmp(fstype, "opts=", 5) && strncmp(fstype, "loop", 4) &&
 684             !strchr(fstype, ','))
 685                 type = fstype;
 686         else
 687                 type = DEFAULT_FSTYPE;
 688
 689         num_running++;
 690         retval = execute(type, fs->device, fs->mountpt, interactive);
 691         if (retval) {
 692                 fprintf(stderr, _("%s: Error %d while executing fsck.%s "
 693                         "for %s\n"), progname, retval, type, fs->device);
 694                 num_running--;
 695         }
 696 }
 697
 698
 699 /*
 700  * Deal with the fsck -t argument.
 701  */
 702 struct fs_type_compile {
 703         char **list;
 704         int *type;
 705         int  negate;
 706 } fs_type_compiled;
 707
 708 #define FS_TYPE_NORMAL  0
 709 #define FS_TYPE_OPT     1
 710 #define FS_TYPE_NEGOPT  2
 711
 712 static const char *fs_type_syntax_error =
 713 N_("Either all or none of the filesystem types passed to -t must be prefixed\n"
 714    "with 'no' or '!'.\n");
 715
 716 static void compile_fs_type(char *fs_type, struct fs_type_compile *cmp)
 717 {
 718         char    *cp, *list, *s;
 719         int     num = 2;
 720         int     negate, first_negate = 1;
 721
 722         if (fs_type) {
 723                 for (cp=fs_type; *cp; cp++) {
 724                         if (*cp == ',')
 725                                 num++;
 726                 }
 727         }
 728
 729         cmp->list = malloc(num * sizeof(char *));
 730         cmp->type = malloc(num * sizeof(int));
 731         if (!cmp->list || !cmp->type) {
 732                 fputs(_("Couldn't allocate memory for filesystem types\n"),
 733                       stderr);
 734                 exit(EXIT_ERROR);
 735         }
 736         memset(cmp->list, 0, num * sizeof(char *));
 737         memset(cmp->type, 0, num * sizeof(int));
 738         cmp->negate = 0;
 739
 740         if (!fs_type)
 741                 return;
 742
 743         list = string_copy(fs_type);
 744         num = 0;
 745         s = strtok(list, ",");
 746         while(s) {
 747                 negate = 0;
 748                 if (strncmp(s, "no", 2) == 0) {
 749                         s += 2;
 750                         negate = 1;
 751                 } else if (*s == '!') {
 752                         s++;
 753                         negate = 1;
 754                 }
 755                 if (strcmp(s, "loop") == 0)
 756                         /* loop is really short-hand for opts=loop */
 757                         goto loop_special_case;
 758                 else if (strncmp(s, "opts=", 5) == 0) {
 759                         s += 5;
 760                 loop_special_case:
 761                         cmp->type[num] = negate ? FS_TYPE_NEGOPT : FS_TYPE_OPT;
 762                 } else {
 763                         if (first_negate) {
 764                                 cmp->negate = negate;
 765                                 first_negate = 0;
 766                         }
 767                         if ((negate && !cmp->negate) ||
 768                             (!negate && cmp->negate)) {
 769                                 fputs(_(fs_type_syntax_error), stderr);
 770                                 exit(EXIT_USAGE);
 771                         }
 772                 }
 773 #if 0
 774                 printf("Adding %s to list (type %d).\n", s, cmp->type[num]);
 775 #endif
 776                 cmp->list[num++] = string_copy(s);
 777                 s = strtok(NULL, ",");
 778         }
 779         free(list);
 780 }
 781
 782 /*
 783  * This function returns true if a particular option appears in a
 784  * comma-delimited options list
 785  */
 786 static int opt_in_list(char *opt, char *optlist)
 787 {
 788         char    *list, *s;
 789
 790         if (!optlist)
 791                 return 0;
 792         list = string_copy(optlist);
 793
 794         s = strtok(list, ",");
 795         while(s) {
 796                 if (strcmp(s, opt) == 0) {
 797                         free(list);
 798                         return 1;
 799                 }
 800                 s = strtok(NULL, ",");
 801         }
 802         free(list);
 803         return 0;
 804 }
 805
 806 /* See if the filesystem matches the criteria given by the -t option */
 807 static int fs_match(struct fs_info *fs, struct fs_type_compile *cmp)
 808 {
 809         int n, ret = 0, checked_type = 0;
 810         char *cp;
 811
 812         if (cmp->list == 0 || cmp->list[0] == 0)
 813                 return 1;
 814
 815         for (n=0; (cp = cmp->list[n]); n++) {
 816                 switch (cmp->type[n]) {
 817                 case FS_TYPE_NORMAL:
 818                         checked_type++;
 819                         if (strcmp(cp, fs->type) == 0) {
 820                                 ret = 1;
 821                         }
 822                         break;
 823                 case FS_TYPE_NEGOPT:
 824                         if (opt_in_list(cp, fs->opts))
 825                                 return 0;
 826                         break;
 827                 case FS_TYPE_OPT:
 828                         if (!opt_in_list(cp, fs->opts))
 829                                 return 0;
 830                         break;
 831                 }
 832         }
 833         if (checked_type == 0)
 834                 return 1;
 835         return (cmp->negate ? !ret : ret);
 836 }
 837
 838 /* Check if we should ignore this filesystem. */
 839 static int ignore(struct fs_info *fs)
 840 {
 841         const char **ip;
 842         int wanted = 0;
 843
 844         /*
 845          * If the pass number is 0, ignore it.
 846          */
 847         if (fs->passno == 0)
 848                 return 1;
 849
 850         interpret_type(fs);
 851
 852         /*
 853          * If a specific fstype is specified, and it doesn't match,
 854          * ignore it.
 855          */
 856         if (!fs_match(fs, &fs_type_compiled)) return 1;
 857
 858         /* Are we ignoring this type? */
 859         for(ip = ignored_types; *ip; ip++)
 860                 if (strcmp(fs->type, *ip) == 0) return 1;
 861
 862         /* Do we really really want to check this fs? */
 863         for(ip = really_wanted; *ip; ip++)
 864                 if (strcmp(fs->type, *ip) == 0) {
 865                         wanted = 1;
 866                         break;
 867                 }
 868
 869         /* See if the <fsck.fs> program is available. */
 870         if (find_fsck(fs->type) == NULL) {
 871                 if (wanted)
 872                         fprintf(stderr, _("fsck: cannot check %s: fsck.%s not found\n"),
 873                                 fs->device, fs->type);
 874                 return 1;
 875         }
 876
 877         /* We can and want to check this file system type. */
 878         return 0;
 879 }
 880
 881 /*
 882  * Returns TRUE if a partition on the same disk is already being
 883  * checked.
 884  */
 885 static int device_already_active(char *device)
 886 {
 887         struct fsck_instance *inst;
 888         char *base;
 889
 890         if (force_all_parallel)
 891                 return 0;
 892
 893 #ifdef BASE_MD
 894         /* Don't check a soft raid disk with any other disk */
 895         if (instance_list &&
 896             (!strncmp(instance_list->device, BASE_MD, sizeof(BASE_MD)-1) ||
 897              !strncmp(device, BASE_MD, sizeof(BASE_MD)-1)))
 898                 return 1;
 899 #endif
 900
 901         base = base_device(device);
 902         /*
 903          * If we don't know the base device, assume that the device is
 904          * already active if there are any fsck instances running.
 905          */
 906         if (!base)
 907                 return (instance_list != 0);
 908         for (inst = instance_list; inst; inst = inst->next) {
 909                 if (!inst->base_device || !strcmp(base, inst->base_device)) {
 910                         free(base);
 911                         return 1;
 912                 }
 913         }
 914         free(base);
 915         return 0;
 916 }
 917
 918 /* Check all file systems, using the /etc/fstab table. */
 919 static int check_all(NOARGS)
 920 {
 921         struct fs_info *fs = NULL;
 922         int status = EXIT_OK;
 923         int not_done_yet = 1;
 924         int passno = 1;
 925         int pass_done;
 926
 927         if (verbose)
 928                 fputs(_("Checking all file systems.\n"), stdout);
 929
 930         /*
 931          * Do an initial scan over the filesystem; mark filesystems
 932          * which should be ignored as done, and resolve any "auto"
 933          * filesystem types (done as a side-effect of calling ignore()).
 934          */
 935         for (fs = filesys_info; fs; fs = fs->next) {
 936                 if (ignore(fs))
 937                         fs->flags |= FLAG_DONE;
 938         }
 939
 940         /*
 941          * Find and check the root filesystem.
 942          */
 943         if (!parallel_root) {
 944                 for (fs = filesys_info; fs; fs = fs->next) {
 945                         if (!strcmp(fs->mountpt, "/"))
 946                                 break;
 947                 }
 948                 if (fs) {
 949                         if (!skip_root && !ignore(fs)) {
 950                                 fsck_device(fs, 1);
 951                                 status |= wait_many(FLAG_WAIT_ALL);
 952                                 if (status > EXIT_NONDESTRUCT)
 953                                         return status;
 954                         }
 955                         fs->flags |= FLAG_DONE;
 956                 }
 957         }
 958         /*
 959          * This is for the bone-headed user who enters the root
 960          * filesystem twice.  Skip root will skep all root entries.
 961          */
 962         if (skip_root)
 963                 for (fs = filesys_info; fs; fs = fs->next)
 964                         if (!strcmp(fs->mountpt, "/"))
 965                                 fs->flags |= FLAG_DONE;
 966
 967         while (not_done_yet) {
 968                 not_done_yet = 0;
 969                 pass_done = 1;
 970
 971                 for (fs = filesys_info; fs; fs = fs->next) {
 972                         if (cancel_requested)
 973                                 break;
 974                         if (fs->flags & FLAG_DONE)
 975                                 continue;
 976                         /*
 977                          * If the filesystem's pass number is higher
 978                          * than the current pass number, then we don't
 979                          * do it yet.
 980                          */
 981                         if (fs->passno > passno) {
 982                                 not_done_yet++;
 983                                 continue;
 984                         }
 985                         /*
 986                          * If a filesystem on a particular device has
 987                          * already been spawned, then we need to defer
 988                          * this to another pass.
 989                          */
 990                         if (device_already_active(fs->device)) {
 991                                 pass_done = 0;
 992                                 continue;
 993                         }
 994                         /*
 995                          * Spawn off the fsck process
 996                          */
 997                         fsck_device(fs, serialize);
 998                         fs->flags |= FLAG_DONE;
 999
1000                         /*
1001                          * Only do one filesystem at a time, or if we
1002                          * have a limit on the number of fsck's extant
1003                          * at one time, apply that limit.
1004                          */
1005                         if (serialize ||
1006                             (max_running && (num_running >= max_running))) {
1007                                 pass_done = 0;
1008                                 break;
1009                         }
1010                 }
1011                 if (cancel_requested)
1012                         break;
1013                 if (verbose > 1)
1014                         printf(_("--waiting-- (pass %d)\n"), passno);
1015                 status |= wait_many(pass_done ? FLAG_WAIT_ALL :
1016                                     FLAG_WAIT_ATLEAST_ONE);
1017                 if (pass_done) {
1018                         if (verbose > 1)
1019                                 printf("----------------------------------\n");
1020                         passno++;
1021                 } else
1022                         not_done_yet++;
1023         }
1024         if (cancel_requested && !kill_sent) {
1025                 kill_all(SIGTERM);
1026                 kill_sent++;
1027         }
1028         status |= wait_many(FLAG_WAIT_ATLEAST_ONE);
1029         return status;
1030 }
1031
1032 static void usage(NOARGS)
1033 {
1034         fputs(_("Usage: fsck [-ACNPRTV] [-t fstype] [fs-options] [filesys ...]\n"), stderr);
1035         exit(EXIT_USAGE);
1036 }
1037
1038 #ifdef HAVE_SIGNAL_H
1039 static void signal_cancel(int sig FSCK_ATTR((unused)))
1040 {
1041         cancel_requested++;
1042 }
1043 #endif
1044
1045 static void PRS(int argc, char *argv[])
1046 {
1047         int     i, j;
1048         char    *arg, *dev, *tmp = 0;
1049         char    options[128];
1050         int     opt = 0;
1051         int     opts_for_fsck = 0;
1052 #ifdef HAVE_SIGNAL_H
1053         struct sigaction        sa;
1054
1055         /*
1056          * Set up signal action
1057          */
1058         memset(&sa, 0, sizeof(struct sigaction));
1059         sa.sa_handler = signal_cancel;
1060         sigaction(SIGINT, &sa, 0);
1061         sigaction(SIGTERM, &sa, 0);
1062 #endif
1063
1064         num_devices = 0;
1065         num_args = 0;
1066         instance_list = 0;
1067
1068         progname = argv[0];
1069
1070         for (i=1; i < argc; i++) {
1071                 arg = argv[i];
1072                 if (!arg)
1073                         continue;
1074                 if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) {
1075                         if (num_devices >= MAX_DEVICES) {
1076                                 fprintf(stderr, _("%s: too many devices\n"),
1077                                         progname);
1078                                 exit(EXIT_ERROR);
1079                         }
1080                         dev = blkid_get_devname(cache, arg, NULL);
1081                         if (!dev && strchr(arg, '=')) {
1082                                 /*
1083                                  * Check to see if we failed because
1084                                  * /proc/partitions isn't found.
1085                                  */
1086                                 if (access("/proc/partitions", R_OK) < 0) {
1087                                         fprintf(stderr, "Couldn't open /proc/partitions: %s\n",
1088                                                 strerror(errno));
1089                                         fprintf(stderr, "Is /proc mounted?\n");
1090                                         exit(EXIT_ERROR);
1091                                 }
1092                                 /*
1093                                  * Check to see if this is because
1094                                  * we're not running as root
1095                                  */
1096                                 if (geteuid())
1097                                         fprintf(stderr,
1098                 "Must be root to scan for matching filesystems: %s\n", arg);
1099                                 else
1100                                         fprintf(stderr,
1101                 "Couldn't find matching filesystem: %s\n", arg);
1102                                 exit(EXIT_ERROR);
1103                         }
1104                         devices[num_devices++] = dev ? dev : string_copy(arg);
1105                         continue;
1106                 }
1107                 if (arg[0] != '-' || opts_for_fsck) {
1108                         if (num_args >= MAX_ARGS) {
1109                                 fprintf(stderr, _("%s: too many arguments\n"),
1110                                         progname);
1111                                 exit(EXIT_ERROR);
1112                         }
1113                         args[num_args++] = string_copy(arg);
1114                         continue;
1115                 }
1116                 for (j=1; arg[j]; j++) {
1117                         if (opts_for_fsck) {
1118                                 options[++opt] = arg[j];
1119                                 continue;
1120                         }
1121                         switch (arg[j]) {
1122                         case 'A':
1123                                 doall++;
1124                                 break;
1125                         case 'C':
1126                                 progress++;
1127                                 break;
1128                         case 'V':
1129                                 verbose++;
1130                                 break;
1131                         case 'N':
1132                                 noexecute++;
1133                                 break;
1134                         case 'R':
1135                                 skip_root++;
1136                                 break;
1137                         case 'T':
1138                                 notitle++;
1139                                 break;
1140                         case 'M':
1141                                 like_mount++;
1142                                 break;
1143                         case 'P':
1144                                 parallel_root++;
1145                                 break;
1146                         case 's':
1147                                 serialize++;
1148                                 break;
1149                         case 't':
1150                                 if (fstype)
1151                                         usage();
1152                                 if (arg[j+1])
1153                                         tmp = arg+j+1;
1154                                 else if ((i+1) < argc)
1155                                         tmp = argv[++i];
1156                                 else
1157                                         usage();
1158                                 fstype = string_copy(tmp);
1159                                 compile_fs_type(fstype, &fs_type_compiled);
1160                                 goto next_arg;
1161                         case '-':
1162                                 opts_for_fsck++;
1163                                 break;
1164                         case '?':
1165                                 usage();
1166                                 break;
1167                         default:
1168                                 options[++opt] = arg[j];
1169                                 break;
1170                         }
1171                 }
1172         next_arg:
1173                 if (opt) {
1174                         options[0] = '-';
1175                         options[++opt] = '\0';
1176                         if (num_args >= MAX_ARGS) {
1177                                 fprintf(stderr,
1178                                         _("%s: too many arguments\n"),
1179                                         progname);
1180                                 exit(EXIT_ERROR);
1181                         }
1182                         args[num_args++] = string_copy(options);
1183                         opt = 0;
1184                 }
1185         }
1186         if (getenv("FSCK_FORCE_ALL_PARALLEL"))
1187                 force_all_parallel++;
1188         if ((tmp = getenv("FSCK_MAX_INST")))
1189             max_running = atoi(tmp);
1190 }
1191
1192 int main(int argc, char *argv[])
1193 {
1194         int i, status = 0;
1195         int interactive = 0;
1196         char *oldpath = getenv("PATH");
1197         const char *fstab;
1198         struct fs_info *fs;
1199
1200         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
1201         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
1202
1203 #ifdef ENABLE_NLS
1204         setlocale(LC_MESSAGES, "");
1205         setlocale(LC_CTYPE, "");
1206         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1207         textdomain(NLS_CAT_NAME);
1208 #endif
1209         blkid_get_cache(&cache, NULL);
1210         PRS(argc, argv);
1211
1212         if (!notitle)
1213                 printf("fsck %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1214
1215         fstab = getenv("FSTAB_FILE");
1216         if (!fstab)
1217                 fstab = _PATH_MNTTAB;
1218         load_fs_info(fstab);
1219
1220         /* Update our search path to include uncommon directories. */
1221         if (oldpath) {
1222                 fsck_path = malloc (strlen (fsck_prefix_path) + 1 +
1223                                     strlen (oldpath) + 1);
1224                 strcpy (fsck_path, fsck_prefix_path);
1225                 strcat (fsck_path, ":");
1226                 strcat (fsck_path, oldpath);
1227         } else {
1228                 fsck_path = string_copy(fsck_prefix_path);
1229         }
1230
1231         if ((num_devices == 1) || (serialize))
1232                 interactive = 1;
1233
1234         /* If -A was specified ("check all"), do that! */
1235         if (doall)
1236                 return check_all();
1237
1238         if (num_devices == 0) {
1239                 serialize++;
1240                 interactive++;
1241                 return check_all();
1242         }
1243         for (i = 0 ; i < num_devices; i++) {
1244                 if (cancel_requested) {
1245                         if (!kill_sent) {
1246                                 kill_all(SIGTERM);
1247                                 kill_sent++;
1248                         }
1249                         break;
1250                 }
1251                 fs = lookup(devices[i]);
1252                 if (!fs) {
1253                         fs = create_fs_device(devices[i], 0, "auto",
1254                                               0, -1, -1);
1255                         if (!fs)
1256                                 continue;
1257                 }
1258                 fsck_device(fs, interactive);
1259                 if (serialize ||
1260                     (max_running && (num_running >= max_running))) {
1261                         struct fsck_instance *inst;
1262
1263                         inst = wait_one(0);
1264                         if (inst) {
1265                                 status |= inst->exit_status;
1266                                 free_instance(inst);
1267                         }
1268                         if (verbose > 1)
1269                                 printf("----------------------------------\n");
1270                 }
1271         }
1272         status |= wait_many(FLAG_WAIT_ALL);
1273         free(fsck_path);
1274         blkid_put_cache(cache);
1275         return status;
1276 }