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  * Miquel van Smoorenburg (miquels@drinkel.ow.org) 20-Oct-1994:
  12  *   o Changed -t fstype to behave like with mount when -A (all file
  13  *     systems) or -M (like mount) is specified.
  14  *   o fsck looks if it can find the fsck.type program to decide
  15  *     if it should ignore the fs type. This way more fsck programs
  16  *     can be added without changing this front-end.
  17  *   o -R flag skip root file system.
  18  *
  19  * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
  20  *      2001, 2002, 2003, 2004, 2005 by  Theodore Ts'o.
  21  *
  22  * %Begin-Header%
  23  * This file may be redistributed under the terms of the GNU Public
  24  * License.
  25  * %End-Header%
  26  */
  27
  28 #include <sys/types.h>
  29 #include <sys/wait.h>
  30 #include <sys/signal.h>
  31 #include <sys/stat.h>
  32 #include <limits.h>
  33 #include <stdio.h>
  34 #include <ctype.h>
  35 #include <string.h>
  36 #include <time.h>
  37 #if HAVE_STDLIB_H
  38 #include <stdlib.h>
  39 #endif
  40 #if HAVE_ERRNO_H
  41 #include <errno.h>
  42 #endif
  43 #if HAVE_PATHS_H
  44 #include <paths.h>
  45 #endif
  46 #if HAVE_UNISTD_H
  47 #include <unistd.h>
  48 #endif
  49 #if HAVE_ERRNO_H
  50 #include <errno.h>
  51 #endif
  52 #if HAVE_MALLOC_H
  53 #include <malloc.h>
  54 #endif
  55 #ifdef HAVE_SIGNAL_H
  56 #include <signal.h>
  57 #endif
  58
  59 #include "../version.h"
  60 #include "nls-enable.h"
  61 #include "fsck.h"
  62 #include "blkid/blkid.h"
  63
  64 #ifndef _PATH_MNTTAB
  65 #define _PATH_MNTTAB    "/etc/fstab"
  66 #endif
  67
  68 static const char *ignored_types[] = {
  69         "ignore",
  70         "iso9660",
  71         "nfs",
  72         "proc",
  73         "sw",
  74         "swap",
  75         "tmpfs",
  76         "devpts",
  77         NULL
  78 };
  79
  80 static const char *really_wanted[] = {
  81         "minix",
  82         "ext2",
  83         "ext3",
  84         "jfs",
  85         "reiserfs",
  86         "xiafs",
  87         "xfs",
  88         NULL
  89 };
  90
  91 #define BASE_MD "/dev/md"
  92
  93 /*
  94  * Global variables for options
  95  */
  96 char *devices[MAX_DEVICES];
  97 char *args[MAX_ARGS];
  98 int num_devices, num_args;
  99
 100 int verbose = 0;
 101 int doall = 0;
 102 int noexecute = 0;
 103 int serialize = 0;
 104 int skip_root = 0;
 105 int like_mount = 0;
 106 int notitle = 0;
 107 int parallel_root = 0;
 108 int progress = 0;
 109 int progress_fd = 0;
 110 int force_all_parallel = 0;
 111 int num_running = 0;
 112 int max_running = 0;
 113 volatile int cancel_requested = 0;
 114 int kill_sent = 0;
 115 char *progname;
 116 char *fstype = NULL;
 117 struct fs_info *filesys_info = NULL, *filesys_last = NULL;
 118 struct fsck_instance *instance_list;
 119 const char *fsck_prefix_path = "/sbin:/sbin/fs.d:/sbin/fs:/etc/fs:/etc";
 120 char *fsck_path = 0;
 121 blkid_cache cache = NULL;
 122
 123 static char *string_copy(const char *s)
 124 {
 125         char    *ret;
 126
 127         if (!s)
 128                 return 0;
 129         ret = malloc(strlen(s)+1);
 130         if (ret)
 131                 strcpy(ret, s);
 132         return ret;
 133 }
 134
 135 static int string_to_int(const char *s)
 136 {
 137         long l;
 138         char *p;
 139
 140         l = strtol(s, &p, 0);
 141         if (*p || l == LONG_MIN || l == LONG_MAX || l < 0 || l > INT_MAX)
 142                 return -1;
 143         else
 144                 return (int) l;
 145 }
 146
 147 static int ignore(struct fs_info *);
 148
 149 static char *skip_over_blank(char *cp)
 150 {
 151         while (*cp && isspace(*cp))
 152                 cp++;
 153         return cp;
 154 }
 155
 156 static char *skip_over_word(char *cp)
 157 {
 158         while (*cp && !isspace(*cp))
 159                 cp++;
 160         return cp;
 161 }
 162
 163 static void strip_line(char *line)
 164 {
 165         char    *p;
 166
 167         while (*line) {
 168                 p = line + strlen(line) - 1;
 169                 if ((*p == '\n') || (*p == '\r'))
 170                         *p = 0;
 171                 else
 172                         break;
 173         }
 174 }
 175
 176 static char *parse_word(char **buf)
 177 {
 178         char *word, *next;
 179
 180         word = *buf;
 181         if (*word == 0)
 182                 return 0;
 183
 184         word = skip_over_blank(word);
 185         next = skip_over_word(word);
 186         if (*next)
 187                 *next++ = 0;
 188         *buf = next;
 189         return word;
 190 }
 191
 192 static void parse_escape(char *word)
 193 {
 194         char    *p, *q;
 195         int     ac, i;
 196
 197         if (!word)
 198                 return;
 199
 200         for (p = word, q = word; *p; p++, q++) {
 201                 *q = *p;
 202                 if (*p != '\\')
 203                         continue;
 204                 if (*++p == 0)
 205                         break;
 206                 if (*p == 't') {
 207                         *q = '\t';
 208                         continue;
 209                 }
 210                 if (*p == 'n') {
 211                         *q = '\n';
 212                         continue;
 213                 }
 214                 if (!isdigit(*p)) {
 215                         *q = *p;
 216                         continue;
 217                 }
 218                 ac = 0;
 219                 for (i = 0; i < 3; i++, p++) {
 220                         if (!isdigit(*p))
 221                                 break;
 222                         ac = (ac * 8) + (*p - '0');
 223                 }
 224                 *q = ac;
 225                 p--;
 226         }
 227         *q = 0;
 228 }
 229
 230 static void free_instance(struct fsck_instance *i)
 231 {
 232         if (i->prog)
 233                 free(i->prog);
 234         if (i->device)
 235                 free(i->device);
 236         if (i->base_device)
 237                 free(i->base_device);
 238         free(i);
 239         return;
 240 }
 241
 242 static struct fs_info *create_fs_device(const char *device, const char *mntpnt,
 243                                         const char *type, const char *opts,
 244                                         int freq, int passno)
 245 {
 246         struct fs_info *fs;
 247
 248         if (!(fs = malloc(sizeof(struct fs_info))))
 249                 return NULL;
 250
 251         fs->device = string_copy(device);
 252         fs->mountpt = string_copy(mntpnt);
 253         fs->type = string_copy(type);
 254         fs->opts = string_copy(opts ? opts : "");
 255         fs->freq = freq;
 256         fs->passno = passno;
 257         fs->flags = 0;
 258         fs->next = NULL;
 259
 260         if (!filesys_info)
 261                 filesys_info = fs;
 262         else
 263                 filesys_last->next = fs;
 264         filesys_last = fs;
 265
 266         return fs;
 267 }
 268
 269
 270
 271 static int parse_fstab_line(char *line, struct fs_info **ret_fs)
 272 {
 273         char    *dev, *device, *mntpnt, *type, *opts, *freq, *passno, *cp;
 274         struct fs_info *fs;
 275
 276         *ret_fs = 0;
 277         strip_line(line);
 278         if ((cp = strchr(line, '#')))
 279                 *cp = 0;        /* Ignore everything after the comment char */
 280         cp = line;
 281
 282         device = parse_word(&cp);
 283         mntpnt = parse_word(&cp);
 284         type = parse_word(&cp);
 285         opts = parse_word(&cp);
 286         freq = parse_word(&cp);
 287         passno = parse_word(&cp);
 288
 289         if (!device)
 290                 return 0;       /* Allow blank lines */
 291
 292         if (!mntpnt || !type)
 293                 return -1;
 294
 295         parse_escape(device);
 296         parse_escape(mntpnt);
 297         parse_escape(type);
 298         parse_escape(opts);
 299         parse_escape(freq);
 300         parse_escape(passno);
 301
 302         dev = blkid_get_devname(cache, device, NULL);
 303         if (dev)
 304                 device = dev;
 305
 306         if (strchr(type, ','))
 307                 type = 0;
 308
 309         fs = create_fs_device(device, mntpnt, type ? type : "auto", opts,
 310                               freq ? atoi(freq) : -1,
 311                               passno ? atoi(passno) : -1);
 312         if (dev)
 313                 free(dev);
 314
 315         if (!fs)
 316                 return -1;
 317         *ret_fs = fs;
 318         return 0;
 319 }
 320
 321 static void interpret_type(struct fs_info *fs)
 322 {
 323         char    *t;
 324
 325         if (strcmp(fs->type, "auto") != 0)
 326                 return;
 327         t = blkid_get_tag_value(cache, "TYPE", fs->device);
 328         if (t) {
 329                 free(fs->type);
 330                 fs->type = t;
 331         }
 332 }
 333
 334 /*
 335  * Load the filesystem database from /etc/fstab
 336  */
 337 static void load_fs_info(const char *filename)
 338 {
 339         FILE    *f;
 340         char    buf[1024];
 341         int     lineno = 0;
 342         int     old_fstab = 1;
 343         struct fs_info *fs;
 344
 345         if ((f = fopen(filename, "r")) == NULL) {
 346                 fprintf(stderr, _("WARNING: couldn't open %s: %s\n"),
 347                         filename, strerror(errno));
 348                 return;
 349         }
 350         while (!feof(f)) {
 351                 lineno++;
 352                 if (!fgets(buf, sizeof(buf), f))
 353                         break;
 354                 buf[sizeof(buf)-1] = 0;
 355                 if (parse_fstab_line(buf, &fs) < 0) {
 356                         fprintf(stderr, _("WARNING: bad format "
 357                                 "on line %d of %s\n"), lineno, filename);
 358                         continue;
 359                 }
 360                 if (!fs)
 361                         continue;
 362                 if (fs->passno < 0)
 363                         fs->passno = 0;
 364                 else
 365                         old_fstab = 0;
 366         }
 367
 368         fclose(f);
 369
 370         if (old_fstab) {
 371                 fputs(_("\007\007\007"
 372                 "WARNING: Your /etc/fstab does not contain the fsck passno\n"
 373                 "       field.  I will kludge around things for you, but you\n"
 374                 "       should fix your /etc/fstab file as soon as you can.\n\n"), stderr);
 375
 376                 for (fs = filesys_info; fs; fs = fs->next) {
 377                         fs->passno = 1;
 378                 }
 379         }
 380 }
 381
 382 /* Lookup filesys in /etc/fstab and return the corresponding entry. */
 383 static struct fs_info *lookup(char *filesys)
 384 {
 385         struct fs_info *fs;
 386
 387         /* No filesys name given. */
 388         if (filesys == NULL)
 389                 return NULL;
 390
 391         for (fs = filesys_info; fs; fs = fs->next) {
 392                 if (!strcmp(filesys, fs->device) ||
 393                     (fs->mountpt && !strcmp(filesys, fs->mountpt)))
 394                         break;
 395         }
 396
 397         return fs;
 398 }
 399
 400 /* Find fsck program for a given fs type. */
 401 static char *find_fsck(char *type)
 402 {
 403   char *s;
 404   const char *tpl;
 405   static char prog[256];
 406   char *p = string_copy(fsck_path);
 407   struct stat st;
 408
 409   /* Are we looking for a program or just a type? */
 410   tpl = (strncmp(type, "fsck.", 5) ? "%s/fsck.%s" : "%s/%s");
 411
 412   for(s = strtok(p, ":"); s; s = strtok(NULL, ":")) {
 413         sprintf(prog, tpl, s, type);
 414         if (stat(prog, &st) == 0) break;
 415   }
 416   free(p);
 417   return(s ? prog : NULL);
 418 }
 419
 420 static int progress_active(NOARGS)
 421 {
 422         struct fsck_instance *inst;
 423
 424         for (inst = instance_list; inst; inst = inst->next) {
 425                 if (inst->flags & FLAG_DONE)
 426                         continue;
 427                 if (inst->flags & FLAG_PROGRESS)
 428                         return 1;
 429         }
 430         return 0;
 431 }
 432
 433 /*
 434  * Execute a particular fsck program, and link it into the list of
 435  * child processes we are waiting for.
 436  */
 437 static int execute(const char *type, const char *device, const char *mntpt,
 438                    int interactive)
 439 {
 440         char *s, *argv[80], prog[80];
 441         int  argc, i;
 442         struct fsck_instance *inst, *p;
 443         pid_t   pid;
 444
 445         inst = malloc(sizeof(struct fsck_instance));
 446         if (!inst)
 447                 return ENOMEM;
 448         memset(inst, 0, sizeof(struct fsck_instance));
 449
 450         sprintf(prog, "fsck.%s", type);
 451         argv[0] = string_copy(prog);
 452         argc = 1;
 453
 454         for (i=0; i <num_args; i++)
 455                 argv[argc++] = string_copy(args[i]);
 456
 457         if (progress && !progress_active()) {
 458                 if ((strcmp(type, "ext2") == 0) ||
 459                     (strcmp(type, "ext3") == 0)) {
 460                         char tmp[80];
 461                         snprintf(tmp, 80, "-C%d", progress_fd);
 462                         argv[argc++] = string_copy(tmp);
 463                         inst->flags |= FLAG_PROGRESS;
 464                 }
 465         }
 466
 467         argv[argc++] = string_copy(device);
 468         argv[argc] = 0;
 469
 470         s = find_fsck(prog);
 471         if (s == NULL) {
 472                 fprintf(stderr, _("fsck: %s: not found\n"), prog);
 473                 free(inst);
 474                 return ENOENT;
 475         }
 476
 477         if (verbose || noexecute) {
 478                 printf("[%s (%d) -- %s] ", s, num_running,
 479                        mntpt ? mntpt : device);
 480                 for (i=0; i < argc; i++)
 481                         printf("%s ", argv[i]);
 482                 printf("\n");
 483         }
 484
 485         /* Fork and execute the correct program. */
 486         if (noexecute)
 487                 pid = -1;
 488         else if ((pid = fork()) < 0) {
 489                 perror("fork");
 490                 free(inst);
 491                 return errno;
 492         } else if (pid == 0) {
 493                 if (!interactive)
 494                         close(0);
 495                 (void) execv(s, argv);
 496                 perror(argv[0]);
 497                 free(inst);
 498                 exit(EXIT_ERROR);
 499         }
 500
 501         for (i=0; i < argc; i++)
 502                 free(argv[i]);
 503
 504         inst->pid = pid;
 505         inst->prog = string_copy(prog);
 506         inst->type = string_copy(type);
 507         inst->device = string_copy(device);
 508         inst->base_device = base_device(device);
 509         inst->start_time = time(0);
 510         inst->next = NULL;
 511
 512         /*
 513          * Find the end of the list, so we add the instance on at the end.
 514          */
 515         for (p = instance_list; p && p->next; p = p->next);
 516
 517         if (p)
 518                 p->next = inst;
 519         else
 520                 instance_list = inst;
 521
 522         return 0;
 523 }
 524
 525 /*
 526  * Send a signal to all outstanding fsck child processes
 527  */
 528 static int kill_all(int signum)
 529 {
 530         struct fsck_instance *inst;
 531         int     n = 0;
 532
 533         for (inst = instance_list; inst; inst = inst->next) {
 534                 if (inst->flags & FLAG_DONE)
 535                         continue;
 536                 kill(inst->pid, signum);
 537                 n++;
 538         }
 539         return n;
 540 }
 541
 542 /*
 543  * Wait for one child process to exit; when it does, unlink it from
 544  * the list of executing child processes, and return it.
 545  */
 546 static struct fsck_instance *wait_one(int flags)
 547 {
 548         int     status;
 549         int     sig;
 550         struct fsck_instance *inst, *inst2, *prev;
 551         pid_t   pid;
 552
 553         if (!instance_list)
 554                 return NULL;
 555
 556         if (noexecute) {
 557                 inst = instance_list;
 558                 prev = 0;
 559 #ifdef RANDOM_DEBUG
 560                 while (inst->next && (random() & 1)) {
 561                         prev = inst;
 562                         inst = inst->next;
 563                 }
 564 #endif
 565                 inst->exit_status = 0;
 566                 goto ret_inst;
 567         }
 568
 569         /*
 570          * gcc -Wall fails saving throw against stupidity
 571          * (inst and prev are thought to be uninitialized variables)
 572          */
 573         inst = prev = NULL;
 574
 575         do {
 576                 pid = waitpid(-1, &status, flags);
 577                 if (cancel_requested && !kill_sent) {
 578                         kill_all(SIGTERM);
 579                         kill_sent++;
 580                 }
 581                 if ((pid == 0) && (flags & WNOHANG))
 582                         return NULL;
 583                 if (pid < 0) {
 584                         if ((errno == EINTR) || (errno == EAGAIN))
 585                                 continue;
 586                         if (errno == ECHILD) {
 587                                 fprintf(stderr,
 588                                         _("%s: wait: No more child process?!?\n"),
 589                                         progname);
 590                                 return NULL;
 591                         }
 592                         perror("wait");
 593                         continue;
 594                 }
 595                 for (prev = 0, inst = instance_list;
 596                      inst;
 597                      prev = inst, inst = inst->next) {
 598                         if (inst->pid == pid)
 599                                 break;
 600                 }
 601         } while (!inst);
 602
 603         if (WIFEXITED(status))
 604                 status = WEXITSTATUS(status);
 605         else if (WIFSIGNALED(status)) {
 606                 sig = WTERMSIG(status);
 607                 if (sig == SIGINT) {
 608                         status = EXIT_UNCORRECTED;
 609                 } else {
 610                         printf(_("Warning... %s for device %s exited "
 611                                "with signal %d.\n"),
 612                                inst->prog, inst->device, sig);
 613                         status = EXIT_ERROR;
 614                 }
 615         } else {
 616                 printf(_("%s %s: status is %x, should never happen.\n"),
 617                        inst->prog, inst->device, status);
 618                 status = EXIT_ERROR;
 619         }
 620         inst->exit_status = status;
 621         if (progress && (inst->flags & FLAG_PROGRESS) &&
 622             !progress_active()) {
 623                 for (inst2 = instance_list; inst2; inst2 = inst2->next) {
 624                         if (inst2->flags & FLAG_DONE)
 625                                 continue;
 626                         if (strcmp(inst2->type, "ext2") &&
 627                             strcmp(inst2->type, "ext3"))
 628                                 continue;
 629                         /*
 630                          * If we've just started the fsck, wait a tiny
 631                          * bit before sending the kill, to give it
 632                          * time to set up the signal handler
 633                          */
 634                         if (inst2->start_time < time(0)+2) {
 635                                 if (fork() == 0) {
 636                                         sleep(1);
 637                                         kill(inst2->pid, SIGUSR1);
 638                                         exit(0);
 639                                 }
 640                         } else
 641                                 kill(inst2->pid, SIGUSR1);
 642                         inst2->flags |= FLAG_PROGRESS;
 643                         break;
 644                 }
 645         }
 646 ret_inst:
 647         if (prev)
 648                 prev->next = inst->next;
 649         else
 650                 instance_list = inst->next;
 651         if (verbose > 1)
 652                 printf(_("Finished with %s (exit status %d)\n"),
 653                        inst->device, inst->exit_status);
 654         num_running--;
 655         return inst;
 656 }
 657
 658 #define FLAG_WAIT_ALL           0
 659 #define FLAG_WAIT_ATLEAST_ONE   1
 660 /*
 661  * Wait until all executing child processes have exited; return the
 662  * logical OR of all of their exit code values.
 663  */
 664 static int wait_many(int flags)
 665 {
 666         struct fsck_instance *inst;
 667         int     global_status = 0;
 668         int     wait_flags = 0;
 669
 670         while ((inst = wait_one(wait_flags))) {
 671                 global_status |= inst->exit_status;
 672                 free_instance(inst);
 673 #ifdef RANDOM_DEBUG
 674                 if (noexecute && (flags & WNOHANG) && !(random() % 3))
 675                         break;
 676 #endif
 677                 if (flags & FLAG_WAIT_ATLEAST_ONE)
 678                         wait_flags = WNOHANG;
 679         }
 680         return global_status;
 681 }
 682
 683 /*
 684  * Run the fsck program on a particular device
 685  *
 686  * If the type is specified using -t, and it isn't prefixed with "no"
 687  * (as in "noext2") and only one filesystem type is specified, then
 688  * use that type regardless of what is specified in /etc/fstab.
 689  *
 690  * If the type isn't specified by the user, then use either the type
 691  * specified in /etc/fstab, or DEFAULT_FSTYPE.
 692  */
 693 static void fsck_device(struct fs_info *fs, int interactive)
 694 {
 695         const char *type;
 696         int retval;
 697
 698         interpret_type(fs);
 699
 700         if (strcmp(fs->type, "auto") != 0)
 701                 type = fs->type;
 702         else if (fstype && strncmp(fstype, "no", 2) &&
 703             strncmp(fstype, "opts=", 5) && strncmp(fstype, "loop", 4) &&
 704             !strchr(fstype, ','))
 705                 type = fstype;
 706         else
 707                 type = DEFAULT_FSTYPE;
 708
 709         num_running++;
 710         retval = execute(type, fs->device, fs->mountpt, interactive);
 711         if (retval) {
 712                 fprintf(stderr, _("%s: Error %d while executing fsck.%s "
 713                         "for %s\n"), progname, retval, type, fs->device);
 714                 num_running--;
 715         }
 716 }
 717
 718
 719 /*
 720  * Deal with the fsck -t argument.
 721  */
 722 struct fs_type_compile {
 723         char **list;
 724         int *type;
 725         int  negate;
 726 } fs_type_compiled;
 727
 728 #define FS_TYPE_NORMAL  0
 729 #define FS_TYPE_OPT     1
 730 #define FS_TYPE_NEGOPT  2
 731
 732 static const char *fs_type_syntax_error =
 733 N_("Either all or none of the filesystem types passed to -t must be prefixed\n"
 734    "with 'no' or '!'.\n");
 735
 736 static void compile_fs_type(char *fs_type, struct fs_type_compile *cmp)
 737 {
 738         char    *cp, *list, *s;
 739         int     num = 2;
 740         int     negate, first_negate = 1;
 741
 742         if (fs_type) {
 743                 for (cp=fs_type; *cp; cp++) {
 744                         if (*cp == ',')
 745                                 num++;
 746                 }
 747         }
 748
 749         cmp->list = malloc(num * sizeof(char *));
 750         cmp->type = malloc(num * sizeof(int));
 751         if (!cmp->list || !cmp->type) {
 752                 fputs(_("Couldn't allocate memory for filesystem types\n"),
 753                       stderr);
 754                 exit(EXIT_ERROR);
 755         }
 756         memset(cmp->list, 0, num * sizeof(char *));
 757         memset(cmp->type, 0, num * sizeof(int));
 758         cmp->negate = 0;
 759
 760         if (!fs_type)
 761                 return;
 762
 763         list = string_copy(fs_type);
 764         num = 0;
 765         s = strtok(list, ",");
 766         while(s) {
 767                 negate = 0;
 768                 if (strncmp(s, "no", 2) == 0) {
 769                         s += 2;
 770                         negate = 1;
 771                 } else if (*s == '!') {
 772                         s++;
 773                         negate = 1;
 774                 }
 775                 if (strcmp(s, "loop") == 0)
 776                         /* loop is really short-hand for opts=loop */
 777                         goto loop_special_case;
 778                 else if (strncmp(s, "opts=", 5) == 0) {
 779                         s += 5;
 780                 loop_special_case:
 781                         cmp->type[num] = negate ? FS_TYPE_NEGOPT : FS_TYPE_OPT;
 782                 } else {
 783                         if (first_negate) {
 784                                 cmp->negate = negate;
 785                                 first_negate = 0;
 786                         }
 787                         if ((negate && !cmp->negate) ||
 788                             (!negate && cmp->negate)) {
 789                                 fputs(_(fs_type_syntax_error), stderr);
 790                                 exit(EXIT_USAGE);
 791                         }
 792                 }
 793 #if 0
 794                 printf("Adding %s to list (type %d).\n", s, cmp->type[num]);
 795 #endif
 796                 cmp->list[num++] = string_copy(s);
 797                 s = strtok(NULL, ",");
 798         }
 799         free(list);
 800 }
 801
 802 /*
 803  * This function returns true if a particular option appears in a
 804  * comma-delimited options list
 805  */
 806 static int opt_in_list(char *opt, char *optlist)
 807 {
 808         char    *list, *s;
 809
 810         if (!optlist)
 811                 return 0;
 812         list = string_copy(optlist);
 813
 814         s = strtok(list, ",");
 815         while(s) {
 816                 if (strcmp(s, opt) == 0) {
 817                         free(list);
 818                         return 1;
 819                 }
 820                 s = strtok(NULL, ",");
 821         }
 822         free(list);
 823         return 0;
 824 }
 825
 826 /* See if the filesystem matches the criteria given by the -t option */
 827 static int fs_match(struct fs_info *fs, struct fs_type_compile *cmp)
 828 {
 829         int n, ret = 0, checked_type = 0;
 830         char *cp;
 831
 832         if (cmp->list == 0 || cmp->list[0] == 0)
 833                 return 1;
 834
 835         for (n=0; (cp = cmp->list[n]); n++) {
 836                 switch (cmp->type[n]) {
 837                 case FS_TYPE_NORMAL:
 838                         checked_type++;
 839                         if (strcmp(cp, fs->type) == 0) {
 840                                 ret = 1;
 841                         }
 842                         break;
 843                 case FS_TYPE_NEGOPT:
 844                         if (opt_in_list(cp, fs->opts))
 845                                 return 0;
 846                         break;
 847                 case FS_TYPE_OPT:
 848                         if (!opt_in_list(cp, fs->opts))
 849                                 return 0;
 850                         break;
 851                 }
 852         }
 853         if (checked_type == 0)
 854                 return 1;
 855         return (cmp->negate ? !ret : ret);
 856 }
 857
 858 /* Check if we should ignore this filesystem. */
 859 static int ignore(struct fs_info *fs)
 860 {
 861         const char **ip;
 862         int wanted = 0;
 863
 864         /*
 865          * If the pass number is 0, ignore it.
 866          */
 867         if (fs->passno == 0)
 868                 return 1;
 869
 870         interpret_type(fs);
 871
 872         /*
 873          * If a specific fstype is specified, and it doesn't match,
 874          * ignore it.
 875          */
 876         if (!fs_match(fs, &fs_type_compiled)) return 1;
 877
 878         /* Are we ignoring this type? */
 879         for(ip = ignored_types; *ip; ip++)
 880                 if (strcmp(fs->type, *ip) == 0) return 1;
 881
 882         /* Do we really really want to check this fs? */
 883         for(ip = really_wanted; *ip; ip++)
 884                 if (strcmp(fs->type, *ip) == 0) {
 885                         wanted = 1;
 886                         break;
 887                 }
 888
 889         /* See if the <fsck.fs> program is available. */
 890         if (find_fsck(fs->type) == NULL) {
 891                 if (wanted)
 892                         fprintf(stderr, _("fsck: cannot check %s: fsck.%s not found\n"),
 893                                 fs->device, fs->type);
 894                 return 1;
 895         }
 896
 897         /* We can and want to check this file system type. */
 898         return 0;
 899 }
 900
 901 /*
 902  * Returns TRUE if a partition on the same disk is already being
 903  * checked.
 904  */
 905 static int device_already_active(char *device)
 906 {
 907         struct fsck_instance *inst;
 908         char *base;
 909
 910         if (force_all_parallel)
 911                 return 0;
 912
 913 #ifdef BASE_MD
 914         /* Don't check a soft raid disk with any other disk */
 915         if (instance_list &&
 916             (!strncmp(instance_list->device, BASE_MD, sizeof(BASE_MD)-1) ||
 917              !strncmp(device, BASE_MD, sizeof(BASE_MD)-1)))
 918                 return 1;
 919 #endif
 920
 921         base = base_device(device);
 922         /*
 923          * If we don't know the base device, assume that the device is
 924          * already active if there are any fsck instances running.
 925          */
 926         if (!base)
 927                 return (instance_list != 0);
 928         for (inst = instance_list; inst; inst = inst->next) {
 929                 if (!inst->base_device || !strcmp(base, inst->base_device)) {
 930                         free(base);
 931                         return 1;
 932                 }
 933         }
 934         free(base);
 935         return 0;
 936 }
 937
 938 /* Check all file systems, using the /etc/fstab table. */
 939 static int check_all(NOARGS)
 940 {
 941         struct fs_info *fs = NULL;
 942         int status = EXIT_OK;
 943         int not_done_yet = 1;
 944         int passno = 1;
 945         int pass_done;
 946
 947         if (verbose)
 948                 fputs(_("Checking all file systems.\n"), stdout);
 949
 950         /*
 951          * Do an initial scan over the filesystem; mark filesystems
 952          * which should be ignored as done, and resolve any "auto"
 953          * filesystem types (done as a side-effect of calling ignore()).
 954          */
 955         for (fs = filesys_info; fs; fs = fs->next) {
 956                 if (ignore(fs))
 957                         fs->flags |= FLAG_DONE;
 958         }
 959
 960         /*
 961          * Find and check the root filesystem.
 962          */
 963         if (!parallel_root) {
 964                 for (fs = filesys_info; fs; fs = fs->next) {
 965                         if (!strcmp(fs->mountpt, "/"))
 966                                 break;
 967                 }
 968                 if (fs) {
 969                         if (!skip_root && !ignore(fs)) {
 970                                 fsck_device(fs, 1);
 971                                 status |= wait_many(FLAG_WAIT_ALL);
 972                                 if (status > EXIT_NONDESTRUCT)
 973                                         return status;
 974                         }
 975                         fs->flags |= FLAG_DONE;
 976                 }
 977         }
 978         /*
 979          * This is for the bone-headed user who enters the root
 980          * filesystem twice.  Skip root will skep all root entries.
 981          */
 982         if (skip_root)
 983                 for (fs = filesys_info; fs; fs = fs->next)
 984                         if (!strcmp(fs->mountpt, "/"))
 985                                 fs->flags |= FLAG_DONE;
 986
 987         while (not_done_yet) {
 988                 not_done_yet = 0;
 989                 pass_done = 1;
 990
 991                 for (fs = filesys_info; fs; fs = fs->next) {
 992                         if (cancel_requested)
 993                                 break;
 994                         if (fs->flags & FLAG_DONE)
 995                                 continue;
 996                         /*
 997                          * If the filesystem's pass number is higher
 998                          * than the current pass number, then we don't
 999                          * do it yet.
1000                          */
1001                         if (fs->passno > passno) {
1002                                 not_done_yet++;
1003                                 continue;
1004                         }
1005                         /*
1006                          * If a filesystem on a particular device has
1007                          * already been spawned, then we need to defer
1008                          * this to another pass.
1009                          */
1010                         if (device_already_active(fs->device)) {
1011                                 pass_done = 0;
1012                                 continue;
1013                         }
1014                         /*
1015                          * Spawn off the fsck process
1016                          */
1017                         fsck_device(fs, serialize);
1018                         fs->flags |= FLAG_DONE;
1019
1020                         /*
1021                          * Only do one filesystem at a time, or if we
1022                          * have a limit on the number of fsck's extant
1023                          * at one time, apply that limit.
1024                          */
1025                         if (serialize ||
1026                             (max_running && (num_running >= max_running))) {
1027                                 pass_done = 0;
1028                                 break;
1029                         }
1030                 }
1031                 if (cancel_requested)
1032                         break;
1033                 if (verbose > 1)
1034                         printf(_("--waiting-- (pass %d)\n"), passno);
1035                 status |= wait_many(pass_done ? FLAG_WAIT_ALL :
1036                                     FLAG_WAIT_ATLEAST_ONE);
1037                 if (pass_done) {
1038                         if (verbose > 1)
1039                                 printf("----------------------------------\n");
1040                         passno++;
1041                 } else
1042                         not_done_yet++;
1043         }
1044         if (cancel_requested && !kill_sent) {
1045                 kill_all(SIGTERM);
1046                 kill_sent++;
1047         }
1048         status |= wait_many(FLAG_WAIT_ATLEAST_ONE);
1049         return status;
1050 }
1051
1052 static void usage(NOARGS)
1053 {
1054         fputs(_("Usage: fsck [-ANPRTV] [ -C [ fd ] ] [-t fstype] [fs-options] [filesys ...]\n"), stderr);
1055         exit(EXIT_USAGE);
1056 }
1057
1058 #ifdef HAVE_SIGNAL_H
1059 static void signal_cancel(int sig FSCK_ATTR((unused)))
1060 {
1061         cancel_requested++;
1062 }
1063 #endif
1064
1065 static void PRS(int argc, char *argv[])
1066 {
1067         int     i, j;
1068         char    *arg, *dev, *tmp = 0;
1069         char    options[128];
1070         int     opt = 0;
1071         int     opts_for_fsck = 0;
1072 #ifdef HAVE_SIGNAL_H
1073         struct sigaction        sa;
1074
1075         /*
1076          * Set up signal action
1077          */
1078         memset(&sa, 0, sizeof(struct sigaction));
1079         sa.sa_handler = signal_cancel;
1080         sigaction(SIGINT, &sa, 0);
1081         sigaction(SIGTERM, &sa, 0);
1082 #endif
1083
1084         num_devices = 0;
1085         num_args = 0;
1086         instance_list = 0;
1087
1088         progname = argv[0];
1089
1090         for (i=1; i < argc; i++) {
1091                 arg = argv[i];
1092                 if (!arg)
1093                         continue;
1094                 if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) {
1095                         if (num_devices >= MAX_DEVICES) {
1096                                 fprintf(stderr, _("%s: too many devices\n"),
1097                                         progname);
1098                                 exit(EXIT_ERROR);
1099                         }
1100                         dev = blkid_get_devname(cache, arg, NULL);
1101                         if (!dev && strchr(arg, '=')) {
1102                                 /*
1103                                  * Check to see if we failed because
1104                                  * /proc/partitions isn't found.
1105                                  */
1106                                 if (access("/proc/partitions", R_OK) < 0) {
1107                                         fprintf(stderr, "Couldn't open /proc/partitions: %s\n",
1108                                                 strerror(errno));
1109                                         fprintf(stderr, "Is /proc mounted?\n");
1110                                         exit(EXIT_ERROR);
1111                                 }
1112                                 /*
1113                                  * Check to see if this is because
1114                                  * we're not running as root
1115                                  */
1116                                 if (geteuid())
1117                                         fprintf(stderr,
1118                 "Must be root to scan for matching filesystems: %s\n", arg);
1119                                 else
1120                                         fprintf(stderr,
1121                 "Couldn't find matching filesystem: %s\n", arg);
1122                                 exit(EXIT_ERROR);
1123                         }
1124                         devices[num_devices++] = dev ? dev : string_copy(arg);
1125                         continue;
1126                 }
1127                 if (arg[0] != '-' || opts_for_fsck) {
1128                         if (num_args >= MAX_ARGS) {
1129                                 fprintf(stderr, _("%s: too many arguments\n"),
1130                                         progname);
1131                                 exit(EXIT_ERROR);
1132                         }
1133                         args[num_args++] = string_copy(arg);
1134                         continue;
1135                 }
1136                 for (j=1; arg[j]; j++) {
1137                         if (opts_for_fsck) {
1138                                 options[++opt] = arg[j];
1139                                 continue;
1140                         }
1141                         switch (arg[j]) {
1142                         case 'A':
1143                                 doall++;
1144                                 break;
1145                         case 'C':
1146                                 progress++;
1147                                 if (arg[j+1]) {
1148                                         progress_fd = string_to_int(arg+j+1);
1149                                         if (progress_fd < 0)
1150                                                 progress_fd = 0;
1151                                         else
1152                                                 goto next_arg;
1153                                 } else if ((i+1) < argc &&
1154                                            !strncmp(argv[i+1], "-", 1) == 0) {
1155                                         progress_fd = string_to_int(argv[i]);
1156                                         if (progress_fd < 0)
1157                                                 progress_fd = 0;
1158                                         else {
1159                                                 goto next_arg;
1160                                                 i++;
1161                                         }
1162                                 }
1163                                 break;
1164                         case 'V':
1165                                 verbose++;
1166                                 break;
1167                         case 'N':
1168                                 noexecute++;
1169                                 break;
1170                         case 'R':
1171                                 skip_root++;
1172                                 break;
1173                         case 'T':
1174                                 notitle++;
1175                                 break;
1176                         case 'M':
1177                                 like_mount++;
1178                                 break;
1179                         case 'P':
1180                                 parallel_root++;
1181                                 break;
1182                         case 's':
1183                                 serialize++;
1184                                 break;
1185                         case 't':
1186                                 tmp = 0;
1187                                 if (fstype)
1188                                         usage();
1189                                 if (arg[j+1])
1190                                         tmp = arg+j+1;
1191                                 else if ((i+1) < argc)
1192                                         tmp = argv[++i];
1193                                 else
1194                                         usage();
1195                                 fstype = string_copy(tmp);
1196                                 compile_fs_type(fstype, &fs_type_compiled);
1197                                 goto next_arg;
1198                         case '-':
1199                                 opts_for_fsck++;
1200                                 break;
1201                         case '?':
1202                                 usage();
1203                                 break;
1204                         default:
1205                                 options[++opt] = arg[j];
1206                                 break;
1207                         }
1208                 }
1209         next_arg:
1210                 if (opt) {
1211                         options[0] = '-';
1212                         options[++opt] = '\0';
1213                         if (num_args >= MAX_ARGS) {
1214                                 fprintf(stderr,
1215                                         _("%s: too many arguments\n"),
1216                                         progname);
1217                                 exit(EXIT_ERROR);
1218                         }
1219                         args[num_args++] = string_copy(options);
1220                         opt = 0;
1221                 }
1222         }
1223         if (getenv("FSCK_FORCE_ALL_PARALLEL"))
1224                 force_all_parallel++;
1225         if ((tmp = getenv("FSCK_MAX_INST")))
1226             max_running = atoi(tmp);
1227 }
1228
1229 int main(int argc, char *argv[])
1230 {
1231         int i, status = 0;
1232         int interactive = 0;
1233         char *oldpath = getenv("PATH");
1234         const char *fstab;
1235         struct fs_info *fs;
1236
1237         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
1238         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
1239
1240 #ifdef ENABLE_NLS
1241         setlocale(LC_MESSAGES, "");
1242         setlocale(LC_CTYPE, "");
1243         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1244         textdomain(NLS_CAT_NAME);
1245 #endif
1246         blkid_get_cache(&cache, NULL);
1247         PRS(argc, argv);
1248
1249         if (!notitle)
1250                 printf("fsck %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1251
1252         fstab = getenv("FSTAB_FILE");
1253         if (!fstab)
1254                 fstab = _PATH_MNTTAB;
1255         load_fs_info(fstab);
1256
1257         /* Update our search path to include uncommon directories. */
1258         if (oldpath) {
1259                 fsck_path = malloc (strlen (fsck_prefix_path) + 1 +
1260                                     strlen (oldpath) + 1);
1261                 if (!fsck_path) {
1262                         fprintf(stderr, "%s: Unable to allocate memory for fsck_path\n", progname);
1263                         exit(EXIT_ERROR);
1264                 }
1265                 strcpy (fsck_path, fsck_prefix_path);
1266                 strcat (fsck_path, ":");
1267                 strcat (fsck_path, oldpath);
1268         } else {
1269                 fsck_path = string_copy(fsck_prefix_path);
1270         }
1271
1272         if ((num_devices == 1) || (serialize))
1273                 interactive = 1;
1274
1275         /* If -A was specified ("check all"), do that! */
1276         if (doall)
1277                 return check_all();
1278
1279         if (num_devices == 0) {
1280                 serialize++;
1281                 interactive++;
1282                 return check_all();
1283         }
1284         for (i = 0 ; i < num_devices; i++) {
1285                 if (cancel_requested) {
1286                         if (!kill_sent) {
1287                                 kill_all(SIGTERM);
1288                                 kill_sent++;
1289                         }
1290                         break;
1291                 }
1292                 fs = lookup(devices[i]);
1293                 if (!fs) {
1294                         fs = create_fs_device(devices[i], 0, "auto",
1295                                               0, -1, -1);
1296                         if (!fs)
1297                                 continue;
1298                 }
1299                 fsck_device(fs, interactive);
1300                 if (serialize ||
1301                     (max_running && (num_running >= max_running))) {
1302                         struct fsck_instance *inst;
1303
1304                         inst = wait_one(0);
1305                         if (inst) {
1306                                 status |= inst->exit_status;
1307                                 free_instance(inst);
1308                         }
1309                         if (verbose > 1)
1310                                 printf("----------------------------------\n");
1311                 }
1312         }
1313         status |= wait_many(FLAG_WAIT_ALL);
1314         free(fsck_path);
1315         blkid_put_cache(cache);
1316         return status;
1317 }