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