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 #include <malloc.h>
  54
  55 #include "../version.h"
  56 #include "nls-enable.h"
  57 #include "fsck.h"
  58 #include "get_device_by_label.h"
  59
  60 #ifndef _PATH_MNTTAB
  61 #define _PATH_MNTTAB    "/etc/fstab"
  62 #endif
  63
  64 static const char *ignored_types[] = {
  65         "ignore",
  66         "iso9660",
  67         "nfs",
  68         "proc",
  69         "sw",
  70         "swap",
  71         NULL
  72 };
  73
  74 static const char *really_wanted[] = {
  75         "minix",
  76         "ext2",
  77         "ext3",
  78         "xiafs",
  79         NULL
  80 };
  81
  82 #ifdef DEV_DSK_DEVICES
  83 static const char *base_devices[] = {
  84         "/dev/dsk/hda",
  85         "/dev/dsk/hdb",
  86         "/dev/dsk/hdc",
  87         "/dev/dsk/hdd",
  88         "/dev/dsk/hd1a",
  89         "/dev/dsk/hd1b",
  90         "/dev/dsk/hd1c",
  91         "/dev/dsk/hd1d",
  92         "/dev/dsk/sda",
  93         "/dev/dsk/sdb",
  94         "/dev/dsk/sdc",
  95         "/dev/dsk/sdd",
  96         "/dev/dsk/sde",
  97         "/dev/dsk/sdf",
  98         "/dev/dsk/sdg",
  99         NULL
 100 };
 101 #else
 102 static const char *base_devices[] = {
 103         "/dev/hda",
 104         "/dev/hdb",
 105         "/dev/hdc",
 106         "/dev/hdd",
 107         "/dev/hd1a",
 108         "/dev/hd1b",
 109         "/dev/hd1c",
 110         "/dev/hd1d",
 111         "/dev/sda",
 112         "/dev/sdb",
 113         "/dev/sdc",
 114         "/dev/sdd",
 115         "/dev/sde",
 116         "/dev/sdf",
 117         "/dev/sdg",
 118         NULL
 119 };
 120 #endif
 121
 122 /*
 123  * Global variables for options
 124  */
 125 char *devices[MAX_DEVICES];
 126 char *args[MAX_ARGS];
 127 int num_devices, num_args;
 128
 129 int verbose = 0;
 130 int doall = 0;
 131 int noexecute = 0;
 132 int serialize = 0;
 133 int skip_root = 0;
 134 int like_mount = 0;
 135 int notitle = 0;
 136 int parallel_root = 0;
 137 int progress = 0;
 138 int force_all_parallel = 0;
 139 char *progname;
 140 char *fstype = NULL;
 141 struct fs_info *filesys_info;
 142 struct fsck_instance *instance_list;
 143 const char *fsck_prefix_path = "/sbin:/sbin/fs.d:/sbin/fs:/etc/fs:/etc";
 144 char *fsck_path = 0;
 145 static int ignore(struct fs_info *);
 146
 147 static char *string_copy(const char *s)
 148 {
 149         char    *ret;
 150
 151         ret = malloc(strlen(s)+1);
 152         if (ret)
 153                 strcpy(ret, s);
 154         return ret;
 155 }
 156
 157 static char *skip_over_blank(char *cp)
 158 {
 159         while (*cp && isspace(*cp))
 160                 cp++;
 161         return cp;
 162 }
 163
 164 static char *skip_over_word(char *cp)
 165 {
 166         while (*cp && !isspace(*cp))
 167                 cp++;
 168         return cp;
 169 }
 170
 171 static void strip_line(char *line)
 172 {
 173         char    *p;
 174
 175         while (*line) {
 176                 p = line + strlen(line) - 1;
 177                 if ((*p == '\n') || (*p == '\r'))
 178                         *p = 0;
 179                 else
 180                         break;
 181         }
 182 }
 183
 184 static char *parse_word(char **buf)
 185 {
 186         char *word, *next;
 187
 188         word = *buf;
 189         if (*word == 0)
 190                 return 0;
 191
 192         word = skip_over_blank(word);
 193         next = skip_over_word(word);
 194         if (*next)
 195                 *next++ = 0;
 196         *buf = next;
 197         return word;
 198 }
 199
 200 static void free_instance(struct fsck_instance *i)
 201 {
 202         if (i->prog)
 203                 free(i->prog);
 204         if (i->device)
 205                 free(i->device);
 206         free(i);
 207         return;
 208 }
 209
 210 static int parse_fstab_line(char *line, struct fs_info **ret_fs)
 211 {
 212         char    *device, *mntpnt, *type, *opts, *freq, *passno, *cp;
 213         struct fs_info *fs;
 214
 215         *ret_fs = 0;
 216         strip_line(line);
 217         if ((cp = strchr(line, '#')))
 218                 *cp = 0;        /* Ignore everything after the comment char */
 219         cp = line;
 220
 221         device = parse_word(&cp);
 222         mntpnt = parse_word(&cp);
 223         type = parse_word(&cp);
 224         opts = parse_word(&cp);
 225         freq = parse_word(&cp);
 226         passno = parse_word(&cp);
 227
 228         if (!device)
 229                 return 0;       /* Allow blank lines */
 230
 231         if (!mntpnt || !type)
 232                 return -1;
 233
 234         if (!(fs = malloc(sizeof(struct fs_info))))
 235                 return -1;
 236
 237         fs->device = string_copy(device);
 238         fs->mountpt = string_copy(mntpnt);
 239         fs->type = string_copy(type);
 240         fs->opts = string_copy(opts ? opts : "");
 241         fs->freq = freq ? atoi(freq) : -1;
 242         fs->passno = passno ? atoi(passno) : -1;
 243         fs->flags = 0;
 244         fs->next = NULL;
 245
 246         *ret_fs = fs;
 247
 248         return 0;
 249 }
 250
 251 /*
 252  * Interpret the device name if necessary
 253  */
 254 static char *interpret_device(char *spec)
 255 {
 256         char *dev = NULL;
 257
 258         if (!strncmp(spec, "UUID=", 5))
 259                 dev = get_spec_by_uuid(spec+5);
 260         else if (!strncmp(spec, "LABEL=", 6))
 261                 dev = get_spec_by_volume_label(spec+6);
 262         else
 263                 return spec;
 264         if (dev) {
 265                 free(spec);
 266                 return (dev);
 267         }
 268         /*
 269          * Check to see if this was because /proc/partitions isn't
 270          * found.
 271          */
 272         if (access("/proc/partitions", R_OK) < 0) {
 273                 fprintf(stderr, "Couldn't open /proc/partitions: %s\n",
 274                         strerror(errno));
 275                 fprintf(stderr, "Is /proc mounted?\n");
 276                 exit(1);
 277         }
 278         /*
 279          * Check to see if this is because we're not running as root
 280          */
 281         if (geteuid())
 282                 fprintf(stderr, "Must be root to scan for matching "
 283                         "filesystems: %s\n", spec);
 284         else
 285                 fprintf(stderr, "Couldn't find matching filesystem: %s\n",
 286                         spec);
 287         exit(1);
 288 }
 289
 290 /*
 291  * Load the filesystem database from /etc/fstab
 292  */
 293 static void load_fs_info(const char *filename)
 294 {
 295         FILE    *f;
 296         char    buf[1024];
 297         int     lineno = 0;
 298         int     old_fstab = 1;
 299         struct fs_info *fs, *fs_last = NULL;
 300
 301         filesys_info = NULL;
 302         if ((f = fopen(filename, "r")) == NULL) {
 303                 fprintf(stderr, _("WARNING: couldn't open %s: %s\n"),
 304                         filename, strerror(errno));
 305                 return;
 306         }
 307         while (!feof(f)) {
 308                 lineno++;
 309                 if (!fgets(buf, sizeof(buf), f))
 310                         break;
 311                 buf[sizeof(buf)-1] = 0;
 312                 if (parse_fstab_line(buf, &fs) < 0) {
 313                         fprintf(stderr, _("WARNING: bad format "
 314                                 "on line %d of %s\n"), lineno, filename);
 315                         continue;
 316                 }
 317                 if (!fs)
 318                         continue;
 319                 if (!filesys_info)
 320                         filesys_info = fs;
 321                 else
 322                         fs_last->next = fs;
 323                 fs_last = fs;
 324                 if (fs->passno < 0)
 325                         fs->passno = 0;
 326                 else
 327                         old_fstab = 0;
 328         }
 329
 330         fclose(f);
 331
 332         if (old_fstab) {
 333                 fprintf(stderr, _("\007\007\007"
 334                 "WARNING: Your /etc/fstab does not contain the fsck passno\n"
 335                 "       field.  I will kludge around things for you, but you\n"
 336                 "       should fix your /etc/fstab file as soon as you can.\n\n"));
 337
 338                 for (fs = filesys_info; fs; fs = fs->next) {
 339                         fs->passno = 1;
 340                 }
 341         }
 342 }
 343
 344 /* Lookup filesys in /etc/fstab and return the corresponding entry. */
 345 static struct fs_info *lookup(char *filesys)
 346 {
 347         struct fs_info *fs;
 348         int     try_again = 0;
 349
 350         /* No filesys name given. */
 351         if (filesys == NULL)
 352                 return NULL;
 353
 354         for (fs = filesys_info; fs; fs = fs->next) {
 355                 if (strchr(fs->device, '='))
 356                         try_again++;
 357                 if (!strcmp(filesys, fs->device) ||
 358                     !strcmp(filesys, fs->mountpt))
 359                         break;
 360         }
 361         if (fs && strchr(fs->device, '='))
 362                 fs->device = interpret_device(fs->device);
 363
 364         if (fs || !try_again)
 365                 return fs;
 366
 367         for (fs = filesys_info; fs; fs = fs->next) {
 368                 fs->device = interpret_device(fs->device);
 369                 if (!strcmp(filesys, fs->device) ||
 370                     !strcmp(filesys, fs->mountpt))
 371                         break;
 372         }
 373
 374         return fs;
 375 }
 376
 377 /* Find fsck program for a given fs type. */
 378 static char *find_fsck(char *type)
 379 {
 380   char *s;
 381   const char *tpl;
 382   static char prog[256];
 383   char *p = string_copy(fsck_path);
 384   struct stat st;
 385
 386   /* Are we looking for a program or just a type? */
 387   tpl = (strncmp(type, "fsck.", 5) ? "%s/fsck.%s" : "%s/%s");
 388
 389   for(s = strtok(p, ":"); s; s = strtok(NULL, ":")) {
 390         sprintf(prog, tpl, s, type);
 391         if (stat(prog, &st) == 0) break;
 392   }
 393   free(p);
 394   return(s ? prog : NULL);
 395 }
 396
 397 static int progress_active(NOARGS)
 398 {
 399         struct fsck_instance *inst;
 400
 401         for (inst = instance_list; inst; inst = inst->next) {
 402                 if (inst->flags & FLAG_DONE)
 403                         continue;
 404                 if (inst->flags & FLAG_PROGRESS)
 405                         return 1;
 406         }
 407         return 0;
 408 }
 409
 410 /*
 411  * Execute a particular fsck program, and link it into the list of
 412  * child processes we are waiting for.
 413  */
 414 static int execute(const char *type, char *device, char *mntpt,
 415                    int interactive)
 416 {
 417         char *s, *argv[80], prog[80];
 418         int  argc, i;
 419         struct fsck_instance *inst, *p;
 420         pid_t   pid;
 421
 422         inst = malloc(sizeof(struct fsck_instance));
 423         if (!inst)
 424                 return ENOMEM;
 425         memset(inst, 0, sizeof(struct fsck_instance));
 426
 427         sprintf(prog, "fsck.%s", type);
 428         argv[0] = string_copy(prog);
 429         argc = 1;
 430
 431         for (i=0; i <num_args; i++)
 432                 argv[argc++] = string_copy(args[i]);
 433
 434         if (progress & !progress_active()) {
 435                 if ((strcmp(type, "ext2") == 0) ||
 436                     (strcmp(type, "ext3") == 0)) {
 437                         argv[argc++] = string_copy("-C0");
 438                         inst->flags |= FLAG_PROGRESS;
 439                 }
 440         }
 441
 442         argv[argc++] = string_copy(device);
 443         argv[argc] = 0;
 444
 445         s = find_fsck(prog);
 446         if (s == NULL) {
 447                 fprintf(stderr, _("fsck: %s: not found\n"), prog);
 448                 return ENOENT;
 449         }
 450
 451         if (verbose || noexecute) {
 452                 printf("[%s -- %s] ", s, mntpt ? mntpt : device);
 453                 for (i=0; i < argc; i++)
 454                         printf("%s ", argv[i]);
 455                 printf("\n");
 456         }
 457
 458         /* Fork and execute the correct program. */
 459         if (noexecute)
 460                 pid = -1;
 461         else if ((pid = fork()) < 0) {
 462                 perror("fork");
 463                 return errno;
 464         } else if (pid == 0) {
 465                 if (!interactive)
 466                         close(0);
 467                 (void) execv(s, argv);
 468                 perror(argv[0]);
 469                 exit(EXIT_ERROR);
 470         }
 471
 472         for (i=0; i < argc; i++)
 473                 free(argv[i]);
 474
 475         inst->pid = pid;
 476         inst->prog = string_copy(prog);
 477         inst->type = string_copy(type);
 478         inst->device = string_copy(device);
 479         inst->start_time = time(0);
 480         inst->next = NULL;
 481
 482         /*
 483          * Find the end of the list, so we add the instance on at the end.
 484          */
 485         for (p = instance_list; p && p->next; p = p->next);
 486
 487         if (p)
 488                 p->next = inst;
 489         else
 490                 instance_list = inst;
 491
 492         return 0;
 493 }
 494
 495 /*
 496  * Wait for one child process to exit; when it does, unlink it from
 497  * the list of executing child processes, and return it.
 498  */
 499 static struct fsck_instance *wait_one(NOARGS)
 500 {
 501         int     status;
 502         int     sig;
 503         struct fsck_instance *inst, *inst2, *prev;
 504         pid_t   pid;
 505
 506         if (!instance_list)
 507                 return NULL;
 508
 509         if (noexecute) {
 510                 inst = instance_list;
 511                 instance_list = inst->next;
 512                 inst->exit_status = 0;
 513                 return(inst);
 514         }
 515
 516         /*
 517          * gcc -Wall fails saving throw against stupidity
 518          * (inst and prev are thought to be uninitialized variables)
 519          */
 520         inst = prev = NULL;
 521
 522         do {
 523                 pid = wait(&status);
 524                 if (pid < 0) {
 525                         if ((errno == EINTR) || (errno == EAGAIN))
 526                                 continue;
 527                         if (errno == ECHILD) {
 528                                 fprintf(stderr,
 529                                         _("%s: wait: No more child process?!?\n"),
 530                                         progname);
 531                                 return NULL;
 532                         }
 533                         perror("wait");
 534                         continue;
 535                 }
 536                 for (prev = 0, inst = instance_list;
 537                      inst;
 538                      prev = inst, inst = inst->next) {
 539                         if (inst->pid == pid)
 540                                 break;
 541                 }
 542         } while (!inst);
 543
 544         if (WIFEXITED(status))
 545                 status = WEXITSTATUS(status);
 546         else if (WIFSIGNALED(status)) {
 547                 sig = WTERMSIG(status);
 548                 if (sig == SIGINT) {
 549                         status = EXIT_UNCORRECTED;
 550                 } else {
 551                         printf(_("Warning... %s for device %s exited "
 552                                "with signal %d.\n"),
 553                                inst->prog, inst->device, sig);
 554                         status = EXIT_ERROR;
 555                 }
 556         } else {
 557                 printf(_("%s %s: status is %x, should never happen.\n"),
 558                        inst->prog, inst->device, status);
 559                 status = EXIT_ERROR;
 560         }
 561         inst->exit_status = status;
 562         if (prev)
 563                 prev->next = inst->next;
 564         else
 565                 instance_list = inst->next;
 566         if (progress && (inst->flags & FLAG_PROGRESS) &&
 567             !progress_active()) {
 568                 for (inst2 = instance_list; inst2; inst2 = inst2->next) {
 569                         if (inst2->flags & FLAG_DONE)
 570                                 continue;
 571                         if (strcmp(inst2->type, "ext2") &&
 572                             strcmp(inst2->type, "ext3"))
 573                                 continue;
 574                         /*
 575                          * If we've just started the fsck, wait a tiny
 576                          * bit before sending the kill, to give it
 577                          * time to set up the signal handler
 578                          */
 579                         if (inst2->start_time < time(0)+2) {
 580                                 if (fork() == 0) {
 581                                         sleep(1);
 582                                         kill(inst2->pid, SIGUSR1);
 583                                         exit(0);
 584                                 }
 585                         } else
 586                                 kill(inst2->pid, SIGUSR1);
 587                         break;
 588                 }
 589         }
 590         return inst;
 591 }
 592
 593 /*
 594  * Wait until all executing child processes have exited; return the
 595  * logical OR of all of their exit code values.
 596  */
 597 static int wait_all(NOARGS)
 598 {
 599         struct fsck_instance *inst;
 600         int     global_status = 0;
 601
 602         while (instance_list) {
 603                 inst = wait_one();
 604                 if (!inst)
 605                         break;
 606                 global_status |= inst->exit_status;
 607                 free_instance(inst);
 608         }
 609         return global_status;
 610 }
 611
 612 /*
 613  * Run the fsck program on a particular device
 614  *
 615  * If the type is specified using -t, and it isn't prefixed with "no"
 616  * (as in "noext2") and only one filesystem type is specified, then
 617  * use that type regardless of what is specified in /etc/fstab.
 618  *
 619  * If the type isn't specified by the user, then use either the type
 620  * specified in /etc/fstab, or DEFAULT_FSTYPE.
 621  */
 622 static void fsck_device(char *device, int interactive)
 623 {
 624         const char *type = 0;
 625         struct fs_info *fsent;
 626         int retval;
 627
 628         if (fstype && strncmp(fstype, "no", 2) && !strchr(fstype, ','))
 629                 type = fstype;
 630
 631         if ((fsent = lookup(device))) {
 632                 device = fsent->device;
 633                 if (!type)
 634                         type = fsent->type;
 635         }
 636         if (!type)
 637                 type = DEFAULT_FSTYPE;
 638
 639         retval = execute(type, device, fsent ? fsent->mountpt : 0,
 640                          interactive);
 641         if (retval) {
 642                 fprintf(stderr, _("%s: Error %d while executing fsck.%s "
 643                         "for %s\n"), progname, retval, type, device);
 644         }
 645 }
 646
 647 /* See if filesystem type matches the list. */
 648 static int fs_match(char *type, char *fs_type)
 649 {
 650   int ret = 0, negate = 0;
 651   char list[128];
 652   char *s;
 653
 654   if (!fs_type) return(1);
 655
 656   if (strncmp(fs_type, "no", 2) == 0) {
 657         fs_type += 2;
 658         negate = 1;
 659   }
 660   strcpy(list, fs_type);
 661   s = strtok(list, ",");
 662   while(s) {
 663         if (strcmp(s, type) == 0) {
 664                 ret = 1;
 665                 break;
 666         }
 667         s = strtok(NULL, ",");
 668   }
 669   return(negate ? !ret : ret);
 670 }
 671
 672
 673 /* Check if we should ignore this filesystem. */
 674 static int ignore(struct fs_info *fs)
 675 {
 676         const char **ip;
 677         int wanted = 0;
 678
 679         /*
 680          * If the pass number is 0, ignore it.
 681          */
 682         if (fs->passno == 0)
 683                 return 1;
 684
 685         /*
 686          * If a specific fstype is specified, and it doesn't match,
 687          * ignore it.
 688          */
 689         if (!fs_match(fs->type, fstype)) return 1;
 690
 691         /* Are we ignoring this type? */
 692         for(ip = ignored_types; *ip; ip++)
 693                 if (strcmp(fs->type, *ip) == 0) return(1);
 694
 695         /* Do we really really want to check this fs? */
 696         for(ip = really_wanted; *ip; ip++)
 697                 if (strcmp(fs->type, *ip) == 0) {
 698                         wanted = 1;
 699                         break;
 700                 }
 701
 702         /* See if the <fsck.fs> program is available. */
 703         if (find_fsck(fs->type) == NULL) {
 704                 if (wanted)
 705                         fprintf(stderr, _("fsck: cannot check %s: fsck.%s not found\n"),
 706                                 fs->device, fs->type);
 707                 return(1);
 708         }
 709
 710         /* We can and want to check this file system type. */
 711         return 0;
 712 }
 713
 714 /*
 715  * Return the "base device" given a particular device; this is used to
 716  * assure that we only fsck one partition on a particular drive at any
 717  * one time.  Otherwise, the disk heads will be seeking all over the
 718  * place.
 719  */
 720 static const char *base_device(char *device)
 721 {
 722         const char **base;
 723
 724         for (base = base_devices; *base; base++) {
 725                 if (!strncmp(*base, device, strlen(*base)))
 726                         return *base;
 727         }
 728         return device;
 729 }
 730
 731 /*
 732  * Returns TRUE if a partition on the same disk is already being
 733  * checked.
 734  */
 735 static int device_already_active(char *device)
 736 {
 737         struct fsck_instance *inst;
 738         const char *base = base_device(device);
 739
 740         if (force_all_parallel)
 741                 return 0;
 742
 743         for (inst = instance_list; inst; inst = inst->next) {
 744                 if (!strcmp(base, base_device(inst->device)))
 745                         return 1;
 746         }
 747         return 0;
 748 }
 749
 750 /* Check all file systems, using the /etc/fstab table. */
 751 static int check_all(NOARGS)
 752 {
 753         struct fs_info *fs = NULL;
 754         struct fsck_instance *inst;
 755         int status = EXIT_OK;
 756         int not_done_yet = 1;
 757         int passno = 1;
 758         int pass_done;
 759
 760         if (verbose)
 761                 printf(_("Checking all file systems.\n"));
 762
 763         /*
 764          * Find and check the root filesystem first.
 765          */
 766         if (!parallel_root) {
 767                 for (fs = filesys_info; fs; fs = fs->next) {
 768                         if (!strcmp(fs->mountpt, "/"))
 769                                 break;
 770                 }
 771                 if (fs && !skip_root && !ignore(fs)) {
 772                         fs->device = interpret_device(fs->device);
 773                         fsck_device(fs->device, 1);
 774                         fs->flags |= FLAG_DONE;
 775                         status |= wait_all();
 776                         if (status > EXIT_NONDESTRUCT)
 777                                 return status;
 778                 }
 779         }
 780         if (fs) fs->flags |= FLAG_DONE;
 781
 782         /*
 783          * Mark filesystems that should be ignored as done.
 784          */
 785         for (fs = filesys_info; fs; fs = fs->next) {
 786                 if (ignore(fs))
 787                         fs->flags |= FLAG_DONE;
 788         }
 789
 790         while (not_done_yet) {
 791                 not_done_yet = 0;
 792                 pass_done = 1;
 793
 794                 for (fs = filesys_info; fs; fs = fs->next) {
 795                         if (fs->flags & FLAG_DONE)
 796                                 continue;
 797                         /*
 798                          * If the filesystem's pass number is higher
 799                          * than the current pass number, then we don't
 800                          * do it yet.
 801                          */
 802                         if (fs->passno > passno) {
 803                                 not_done_yet++;
 804                                 continue;
 805                         }
 806                         /*
 807                          * If a filesystem on a particular device has
 808                          * already been spawned, then we need to defer
 809                          * this to another pass.
 810                          */
 811                         if (device_already_active(fs->device)) {
 812                                 pass_done = 0;
 813                                 continue;
 814                         }
 815                         /*
 816                          * Spawn off the fsck process
 817                          */
 818                         fs->device = interpret_device(fs->device);
 819                         fsck_device(fs->device, serialize);
 820                         fs->flags |= FLAG_DONE;
 821
 822                         if (serialize) {
 823                                 pass_done = 0;
 824                                 break; /* Only do one filesystem at a time */
 825                         }
 826                 }
 827                 if (verbose > 1)
 828                         printf(_("--waiting-- (pass %d)\n"), passno);
 829                 inst = wait_one();
 830                 if (inst) {
 831                         status |= inst->exit_status;
 832                         free_instance(inst);
 833                 }
 834                 if (pass_done) {
 835                         status |= wait_all();
 836                         if (verbose > 1)
 837                                 printf("----------------------------------\n");
 838                         passno++;
 839                 } else
 840                         not_done_yet++;
 841         }
 842         status |= wait_all();
 843         return status;
 844 }
 845
 846 static void usage(NOARGS)
 847 {
 848         fprintf(stderr,
 849                 _("Usage: fsck [-ACNPRTV] [-t fstype] [fs-options] filesys\n"));
 850         exit(EXIT_USAGE);
 851 }
 852
 853 static void PRS(int argc, char *argv[])
 854 {
 855         int     i, j;
 856         char    *arg;
 857         char    options[128];
 858         int     opt = 0;
 859         int     opts_for_fsck = 0;
 860
 861         num_devices = 0;
 862         num_args = 0;
 863         instance_list = 0;
 864
 865         progname = argv[0];
 866
 867         for (i=1; i < argc; i++) {
 868                 arg = argv[i];
 869                 if (!arg)
 870                         continue;
 871                 if ((arg[0] == '/' && !opts_for_fsck) ||
 872                     (strncmp(arg, "LABEL=", 6) == 0) ||
 873                     (strncmp(arg, "UUID=", 5) == 0)) {
 874                         if (num_devices >= MAX_DEVICES) {
 875                                 fprintf(stderr, _("%s: too many devices\n"),
 876                                         progname);
 877                                 exit(1);
 878                         }
 879                         devices[num_devices++] =
 880                                 interpret_device(string_copy(arg));
 881                         continue;
 882                 }
 883                 if (arg[0] != '-' || opts_for_fsck) {
 884                         if (num_args >= MAX_ARGS) {
 885                                 fprintf(stderr, _("%s: too many arguments\n"),
 886                                         progname);
 887                                 exit(1);
 888                         }
 889                         args[num_args++] = string_copy(arg);
 890                         continue;
 891                 }
 892                 for (j=1; arg[j]; j++) {
 893                         if (opts_for_fsck) {
 894                                 options[++opt] = arg[j];
 895                                 continue;
 896                         }
 897                         switch (arg[j]) {
 898                         case 'A':
 899                                 doall++;
 900                                 break;
 901                         case 'C':
 902                                 progress++;
 903                                 break;
 904                         case 'V':
 905                                 verbose++;
 906                                 break;
 907                         case 'N':
 908                                 noexecute++;
 909                                 break;
 910                         case 'R':
 911                                 skip_root++;
 912                                 break;
 913                         case 'T':
 914                                 notitle++;
 915                                 break;
 916                         case 'M':
 917                                 like_mount++;
 918                                 break;
 919                         case 'P':
 920                                 parallel_root++;
 921                                 break;
 922                         case 's':
 923                                 serialize++;
 924                                 break;
 925                         case 't':
 926                                 if (arg[j+1]) {
 927                                         fstype = string_copy(arg+j+1);
 928                                         goto next_arg;
 929                                 }
 930                                 if ((i+1) < argc) {
 931                                         i++;
 932                                         fstype = string_copy(argv[i]);
 933                                         goto next_arg;
 934                                 }
 935                                 usage();
 936                                 break;
 937                         case '-':
 938                                 opts_for_fsck++;
 939                                 break;
 940                         default:
 941                                 options[++opt] = arg[j];
 942                                 break;
 943                         }
 944                 }
 945         next_arg:
 946                 if (opt) {
 947                         options[0] = '-';
 948                         options[++opt] = '\0';
 949                         if (num_args >= MAX_ARGS) {
 950                                 fprintf(stderr,
 951                                         _("%s: too many arguments\n"),
 952                                         progname);
 953                                 exit(1);
 954                         }
 955                         args[num_args++] = string_copy(options);
 956                         opt = 0;
 957                 }
 958         }
 959         if (getenv("FSCK_FORCE_ALL_PARALLEL"))
 960                 force_all_parallel++;
 961 }
 962
 963 int main(int argc, char *argv[])
 964 {
 965         int i;
 966         int status = 0;
 967         int interactive = 0;
 968         char *oldpath = getenv("PATH");
 969         const char *fstab;
 970
 971 #ifdef ENABLE_NLS
 972         setlocale(LC_MESSAGES, "");
 973         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
 974         textdomain(NLS_CAT_NAME);
 975 #endif
 976         PRS(argc, argv);
 977
 978         if (!notitle)
 979                 printf(_("Parallelizing fsck version %s (%s)\n"),
 980                         E2FSPROGS_VERSION, E2FSPROGS_DATE);
 981
 982         fstab = getenv("FSTAB_FILE");
 983         if (!fstab)
 984                 fstab = _PATH_MNTTAB;
 985         load_fs_info(fstab);
 986
 987         /* Update our search path to include uncommon directories. */
 988         if (oldpath) {
 989                 fsck_path = malloc (strlen (fsck_prefix_path) + 1 +
 990                                     strlen (oldpath) + 1);
 991                 strcpy (fsck_path, fsck_prefix_path);
 992                 strcat (fsck_path, ":");
 993                 strcat (fsck_path, oldpath);
 994         } else {
 995                 fsck_path = string_copy(fsck_prefix_path);
 996         }
 997
 998         if ((num_devices == 1) || (serialize))
 999                 interactive = 1;
1000
1001         /* If -A was specified ("check all"), do that! */
1002         if (doall)
1003                 return check_all();
1004
1005         for (i = 0 ; i < num_devices; i++) {
1006                 fsck_device(devices[i], interactive);
1007                 if (serialize) {
1008                         struct fsck_instance *inst;
1009
1010                         inst = wait_one();
1011                         if (inst) {
1012                                 status |= inst->exit_status;
1013                                 free_instance(inst);
1014                         }
1015                 }
1016         }
1017         status |= wait_all();
1018         free(fsck_path);
1019         return status;
1020 }