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 #define _XOPEN_SOURCE 600 /* for inclusion of sa_handler in Solaris */
  29
  30 #include "config.h"
  31 #include <sys/types.h>
  32 #include <sys/wait.h>
  33 #include <sys/stat.h>
  34 #include <limits.h>
  35 #include <stdio.h>
  36 #include <ctype.h>
  37 #include <string.h>
  38 #include <time.h>
  39 #if HAVE_STDLIB_H
  40 #include <stdlib.h>
  41 #endif
  42 #if HAVE_ERRNO_H
  43 #include <errno.h>
  44 #endif
  45 #if HAVE_PATHS_H
  46 #include <paths.h>
  47 #endif
  48 #if HAVE_UNISTD_H
  49 #include <unistd.h>
  50 #endif
  51 #if HAVE_ERRNO_H
  52 #include <errno.h>
  53 #endif
  54 #if HAVE_MALLOC_H
  55 #include <malloc.h>
  56 #endif
  57 #ifdef HAVE_SIGNAL_H
  58 #include <signal.h>
  59 #endif
  60
  61 #include "../version.h"
  62 #include "nls-enable.h"
  63 #include "fsck.h"
  64 #include "blkid/blkid.h"
  65
  66 #ifndef _PATH_MNTTAB
  67 #define _PATH_MNTTAB    "/etc/fstab"
  68 #endif
  69
  70 static const char *ignored_types[] = {
  71         "ignore",
  72         "iso9660",
  73         "nfs",
  74         "proc",
  75         "sw",
  76         "swap",
  77         "tmpfs",
  78         "devpts",
  79         NULL
  80 };
  81
  82 static const char *really_wanted[] = {
  83         "minix",
  84         "ext2",
  85         "ext3",
  86         "ext4",
  87         "ext4dev",
  88         "jfs",
  89         "reiserfs",
  90         "xiafs",
  91         "xfs",
  92         NULL
  93 };
  94
  95 #define BASE_MD "/dev/md"
  96
  97 /*
  98  * Global variables for options
  99  */
 100 static char *devices[MAX_DEVICES];
 101 static char *args[MAX_ARGS];
 102 static int num_devices, num_args;
 103
 104 static int verbose = 0;
 105 static int doall = 0;
 106 static int noexecute = 0;
 107 static int serialize = 0;
 108 static int skip_root = 0;
 109 static int ignore_mounted = 0;
 110 static int notitle = 0;
 111 static int parallel_root = 0;
 112 static int progress = 0;
 113 static int progress_fd = 0;
 114 static int force_all_parallel = 0;
 115 static int num_running = 0;
 116 static int max_running = 0;
 117 static volatile int cancel_requested = 0;
 118 static int kill_sent = 0;
 119 static char *progname;
 120 static char *fstype = NULL;
 121 static struct fs_info *filesys_info = NULL, *filesys_last = NULL;
 122 static struct fsck_instance *instance_list;
 123 static const char *fsck_prefix_path = "/sbin:/sbin/fs.d:/sbin/fs:/etc/fs:/etc";
 124 static char *fsck_path = 0;
 125 static blkid_cache cache = NULL;
 126
 127 static char *string_copy(const char *s)
 128 {
 129         char    *ret;
 130
 131         if (!s)
 132                 return 0;
 133         ret = malloc(strlen(s)+1);
 134         if (ret)
 135                 strcpy(ret, s);
 136         return ret;
 137 }
 138
 139 static int string_to_int(const char *s)
 140 {
 141         long l;
 142         char *p;
 143
 144         l = strtol(s, &p, 0);
 145         if (*p || l == LONG_MIN || l == LONG_MAX || l < 0 || l > INT_MAX)
 146                 return -1;
 147         else
 148                 return (int) l;
 149 }
 150
 151 static int ignore(struct fs_info *);
 152
 153 static char *skip_over_blank(char *cp)
 154 {
 155         while (*cp && isspace(*cp))
 156                 cp++;
 157         return cp;
 158 }
 159
 160 static char *skip_over_word(char *cp)
 161 {
 162         while (*cp && !isspace(*cp))
 163                 cp++;
 164         return cp;
 165 }
 166
 167 static void strip_line(char *line)
 168 {
 169         char    *p;
 170
 171         while (*line) {
 172                 p = line + strlen(line) - 1;
 173                 if ((*p == '\n') || (*p == '\r'))
 174                         *p = 0;
 175                 else
 176                         break;
 177         }
 178 }
 179
 180 static char *parse_word(char **buf)
 181 {
 182         char *word, *next;
 183
 184         word = *buf;
 185         if (*word == 0)
 186                 return 0;
 187
 188         word = skip_over_blank(word);
 189         next = skip_over_word(word);
 190         if (*next)
 191                 *next++ = 0;
 192         *buf = next;
 193         return word;
 194 }
 195
 196 static void parse_escape(char *word)
 197 {
 198         char    *p, *q;
 199         int     ac, i;
 200
 201         if (!word)
 202                 return;
 203
 204         for (p = word, q = word; *p; p++, q++) {
 205                 *q = *p;
 206                 if (*p != '\\')
 207                         continue;
 208                 if (*++p == 0)
 209                         break;
 210                 if (*p == 't') {
 211                         *q = '\t';
 212                         continue;
 213                 }
 214                 if (*p == 'n') {
 215                         *q = '\n';
 216                         continue;
 217                 }
 218                 if (!isdigit(*p)) {
 219                         *q = *p;
 220                         continue;
 221                 }
 222                 ac = 0;
 223                 for (i = 0; i < 3; i++, p++) {
 224                         if (!isdigit(*p))
 225                                 break;
 226                         ac = (ac * 8) + (*p - '0');
 227                 }
 228                 *q = ac;
 229                 p--;
 230         }
 231         *q = 0;
 232 }
 233
 234 static void free_instance(struct fsck_instance *i)
 235 {
 236         free(i->prog);
 237         free(i->device);
 238         free(i->base_device);
 239         free(i);
 240         return;
 241 }
 242
 243 static struct fs_info *create_fs_device(const char *device, const char *mntpnt,
 244                                         const char *type, const char *opts,
 245                                         int freq, int passno)
 246 {
 247         struct fs_info *fs;
 248
 249         if (!(fs = malloc(sizeof(struct fs_info))))
 250                 return NULL;
 251
 252         fs->device = string_copy(device);
 253         fs->mountpt = string_copy(mntpnt);
 254         fs->type = string_copy(type);
 255         fs->opts = string_copy(opts ? opts : "");
 256         fs->freq = freq;
 257         fs->passno = passno;
 258         fs->flags = 0;
 259         fs->next = NULL;
 260
 261         if (!filesys_info)
 262                 filesys_info = fs;
 263         else
 264                 filesys_last->next = fs;
 265         filesys_last = fs;
 266
 267         return fs;
 268 }
 269
 270
 271
 272 static int parse_fstab_line(char *line, struct fs_info **ret_fs)
 273 {
 274         char    *dev, *device, *mntpnt, *type, *opts, *freq, *passno, *cp;
 275         struct fs_info *fs;
 276
 277         *ret_fs = 0;
 278         strip_line(line);
 279         cp = line;
 280
 281         device = parse_word(&cp);
 282         if (!device || *device == '#')
 283                 return 0;       /* Ignore blank lines and comments */
 284         mntpnt = parse_word(&cp);
 285         type = parse_word(&cp);
 286         opts = parse_word(&cp);
 287         freq = parse_word(&cp);
 288         passno = parse_word(&cp);
 289
 290         if (!mntpnt || !type)
 291                 return -1;
 292
 293         parse_escape(device);
 294         parse_escape(mntpnt);
 295         parse_escape(type);
 296         parse_escape(opts);
 297         parse_escape(freq);
 298         parse_escape(passno);
 299
 300         dev = blkid_get_devname(cache, device, NULL);
 301         if (dev)
 302                 device = dev;
 303
 304         if (strchr(type, ','))
 305                 type = 0;
 306
 307         fs = create_fs_device(device, mntpnt, type ? type : "auto", opts,
 308                               freq ? atoi(freq) : -1,
 309                               passno ? atoi(passno) : -1);
 310         free(dev);
 311
 312         if (!fs)
 313                 return -1;
 314         *ret_fs = fs;
 315         return 0;
 316 }
 317
 318 static void interpret_type(struct fs_info *fs)
 319 {
 320         char    *t;
 321
 322         if (strcmp(fs->type, "auto") != 0)
 323                 return;
 324         t = blkid_get_tag_value(cache, "TYPE", fs->device);
 325         if (t) {
 326                 free(fs->type);
 327                 fs->type = t;
 328         }
 329 }
 330
 331 /*
 332  * Load the filesystem database from /etc/fstab
 333  */
 334 static void load_fs_info(const char *filename)
 335 {
 336         FILE    *f;
 337         char    buf[1024];
 338         int     lineno = 0;
 339         int     old_fstab = 1;
 340         struct fs_info *fs;
 341
 342         if ((f = fopen(filename, "r")) == NULL) {
 343                 fprintf(stderr, _("WARNING: couldn't open %s: %s\n"),
 344                         filename, strerror(errno));
 345                 return;
 346         }
 347         while (!feof(f)) {
 348                 lineno++;
 349                 if (!fgets(buf, sizeof(buf), f))
 350                         break;
 351                 buf[sizeof(buf)-1] = 0;
 352                 if (parse_fstab_line(buf, &fs) < 0) {
 353                         fprintf(stderr, _("WARNING: bad format "
 354                                 "on line %d of %s\n"), lineno, filename);
 355                         continue;
 356                 }
 357                 if (!fs)
 358                         continue;
 359                 if (fs->passno < 0)
 360                         fs->passno = 0;
 361                 else
 362                         old_fstab = 0;
 363         }
 364
 365         fclose(f);
 366
 367         if (old_fstab && filesys_info) {
 368                 fputs("\007\007\007", stderr);
 369                 fputs(_(
 370                 "WARNING: Your /etc/fstab does not contain the fsck passno\n"
 371                 "       field.  I will kludge around things for you, but you\n"
 372                 "       should fix your /etc/fstab file as soon as you can.\n\n"), stderr);
 373
 374                 for (fs = filesys_info; fs; fs = fs->next) {
 375                         fs->passno = 1;
 376                 }
 377         }
 378 }
 379
 380 /* Lookup filesys in /etc/fstab and return the corresponding entry. */
 381 static struct fs_info *lookup(char *filesys)
 382 {
 383         struct fs_info *fs;
 384
 385         /* No filesys name given. */
 386         if (filesys == NULL)
 387                 return NULL;
 388
 389         for (fs = filesys_info; fs; fs = fs->next) {
 390                 if (!strcmp(filesys, fs->device) ||
 391                     (fs->mountpt && !strcmp(filesys, fs->mountpt)))
 392                         break;
 393         }
 394
 395         return fs;
 396 }
 397
 398 /* Find fsck program for a given fs type. */
 399 static char *find_fsck(char *type)
 400 {
 401   char *s;
 402   const char *tpl;
 403   static char prog[256];
 404   char *p = string_copy(fsck_path);
 405   struct stat st;
 406
 407   /* Are we looking for a program or just a type? */
 408   tpl = (strncmp(type, "fsck.", 5) ? "%s/fsck.%s" : "%s/%s");
 409
 410   for(s = strtok(p, ":"); s; s = strtok(NULL, ":")) {
 411         sprintf(prog, tpl, s, type);
 412         if (stat(prog, &st) == 0) break;
 413   }
 414   free(p);
 415   return(s ? prog : NULL);
 416 }
 417
 418 static int progress_active(NOARGS)
 419 {
 420         struct fsck_instance *inst;
 421
 422         for (inst = instance_list; inst; inst = inst->next) {
 423                 if (inst->flags & FLAG_DONE)
 424                         continue;
 425                 if (inst->flags & FLAG_PROGRESS)
 426                         return 1;
 427         }
 428         return 0;
 429 }
 430
 431 /*
 432  * Execute a particular fsck program, and link it into the list of
 433  * child processes we are waiting for.
 434  */
 435 static int execute(const char *type, const char *device, const char *mntpt,
 436                    int interactive)
 437 {
 438         char *s, *argv[80], prog[80];
 439         int  argc, i;
 440         struct fsck_instance *inst, *p;
 441         pid_t   pid;
 442
 443         inst = malloc(sizeof(struct fsck_instance));
 444         if (!inst)
 445                 return ENOMEM;
 446         memset(inst, 0, sizeof(struct fsck_instance));
 447
 448         sprintf(prog, "fsck.%s", type);
 449         argv[0] = string_copy(prog);
 450         argc = 1;
 451
 452         for (i=0; i <num_args; i++)
 453                 argv[argc++] = string_copy(args[i]);
 454
 455         if (progress) {
 456                 if ((strcmp(type, "ext2") == 0) ||
 457                     (strcmp(type, "ext3") == 0) ||
 458                     (strcmp(type, "ext4") == 0) ||
 459                     (strcmp(type, "ext4dev") == 0)) {
 460                         char tmp[80];
 461
 462                         tmp[0] = 0;
 463                         if (!progress_active()) {
 464                                 snprintf(tmp, 80, "-C%d", progress_fd);
 465                                 inst->flags |= FLAG_PROGRESS;
 466                         } else if (progress_fd)
 467                                 snprintf(tmp, 80, "-C%d", progress_fd * -1);
 468                         if (tmp[0])
 469                                 argv[argc++] = string_copy(tmp);
 470                 }
 471         }
 472
 473         argv[argc++] = string_copy(device);
 474         argv[argc] = 0;
 475
 476         s = find_fsck(prog);
 477         if (s == NULL) {
 478                 fprintf(stderr, _("fsck: %s: not found\n"), prog);
 479                 free(inst);
 480                 return ENOENT;
 481         }
 482
 483         if (verbose || noexecute) {
 484                 printf("[%s (%d) -- %s] ", s, num_running,
 485                        mntpt ? mntpt : device);
 486                 for (i=0; i < argc; i++)
 487                         printf("%s ", argv[i]);
 488                 printf("\n");
 489         }
 490
 491         /* Fork and execute the correct program. */
 492         if (noexecute)
 493                 pid = -1;
 494         else if ((pid = fork()) < 0) {
 495                 perror("fork");
 496                 free(inst);
 497                 return errno;
 498         } else if (pid == 0) {
 499                 if (!interactive)
 500                         close(0);
 501                 (void) execv(s, argv);
 502                 perror(argv[0]);
 503                 free(inst);
 504                 exit(EXIT_ERROR);
 505         }
 506
 507         for (i=0; i < argc; i++)
 508                 free(argv[i]);
 509
 510         inst->pid = pid;
 511         inst->prog = string_copy(prog);
 512         inst->type = string_copy(type);
 513         inst->device = string_copy(device);
 514         inst->base_device = base_device(device);
 515         inst->start_time = time(0);
 516         inst->next = NULL;
 517
 518         /*
 519          * Find the end of the list, so we add the instance on at the end.
 520          */
 521         for (p = instance_list; p && p->next; p = p->next);
 522
 523         if (p)
 524                 p->next = inst;
 525         else
 526                 instance_list = inst;
 527
 528         return 0;
 529 }
 530
 531 /*
 532  * Send a signal to all outstanding fsck child processes
 533  */
 534 static int kill_all(int signum)
 535 {
 536         struct fsck_instance *inst;
 537         int     n = 0;
 538
 539         for (inst = instance_list; inst; inst = inst->next) {
 540                 if (inst->flags & FLAG_DONE)
 541                         continue;
 542                 kill(inst->pid, signum);
 543                 n++;
 544         }
 545         return n;
 546 }
 547
 548 /*
 549  * Wait for one child process to exit; when it does, unlink it from
 550  * the list of executing child processes, and return it.
 551  */
 552 static struct fsck_instance *wait_one(int flags)
 553 {
 554         int     status;
 555         int     sig;
 556         struct fsck_instance *inst, *inst2, *prev;
 557         pid_t   pid;
 558
 559         if (!instance_list)
 560                 return NULL;
 561
 562         if (noexecute) {
 563                 inst = instance_list;
 564                 prev = 0;
 565 #ifdef RANDOM_DEBUG
 566                 while (inst->next && (random() & 1)) {
 567                         prev = inst;
 568                         inst = inst->next;
 569                 }
 570 #endif
 571                 inst->exit_status = 0;
 572                 goto ret_inst;
 573         }
 574
 575         /*
 576          * gcc -Wall fails saving throw against stupidity
 577          * (inst and prev are thought to be uninitialized variables)
 578          */
 579         inst = prev = NULL;
 580
 581         do {
 582                 pid = waitpid(-1, &status, flags);
 583                 if (cancel_requested && !kill_sent) {
 584                         kill_all(SIGTERM);
 585                         kill_sent++;
 586                 }
 587                 if ((pid == 0) && (flags & WNOHANG))
 588                         return NULL;
 589                 if (pid < 0) {
 590                         if ((errno == EINTR) || (errno == EAGAIN))
 591                                 continue;
 592                         if (errno == ECHILD) {
 593                                 fprintf(stderr,
 594                                         _("%s: wait: No more child process?!?\n"),
 595                                         progname);
 596                                 return NULL;
 597                         }
 598                         perror("wait");
 599                         continue;
 600                 }
 601                 for (prev = 0, inst = instance_list;
 602                      inst;
 603                      prev = inst, inst = inst->next) {
 604                         if (inst->pid == pid)
 605                                 break;
 606                 }
 607         } while (!inst);
 608
 609         if (WIFEXITED(status))
 610                 status = WEXITSTATUS(status);
 611         else if (WIFSIGNALED(status)) {
 612                 sig = WTERMSIG(status);
 613                 if (sig == SIGINT) {
 614                         status = EXIT_UNCORRECTED;
 615                 } else {
 616                         printf(_("Warning... %s for device %s exited "
 617                                "with signal %d.\n"),
 618                                inst->prog, inst->device, sig);
 619                         status = EXIT_ERROR;
 620                 }
 621         } else {
 622                 printf(_("%s %s: status is %x, should never happen.\n"),
 623                        inst->prog, inst->device, status);
 624                 status = EXIT_ERROR;
 625         }
 626         inst->exit_status = status;
 627         inst->flags |= FLAG_DONE;
 628         if (progress && (inst->flags & FLAG_PROGRESS) &&
 629             !progress_active()) {
 630                 for (inst2 = instance_list; inst2; inst2 = inst2->next) {
 631                         if (inst2->flags & FLAG_DONE)
 632                                 continue;
 633                         if (strcmp(inst2->type, "ext2") &&
 634                             strcmp(inst2->type, "ext3") &&
 635                             strcmp(inst2->type, "ext4") &&
 636                             strcmp(inst2->type, "ext4dev"))
 637                                 continue;
 638                         /*
 639                          * If we've just started the fsck, wait a tiny
 640                          * bit before sending the kill, to give it
 641                          * time to set up the signal handler
 642                          */
 643                         if (inst2->start_time < time(0)+2) {
 644                                 if (fork() == 0) {
 645                                         sleep(1);
 646                                         kill(inst2->pid, SIGUSR1);
 647                                         exit(0);
 648                                 }
 649                         } else
 650                                 kill(inst2->pid, SIGUSR1);
 651                         inst2->flags |= FLAG_PROGRESS;
 652                         break;
 653                 }
 654         }
 655 ret_inst:
 656         if (prev)
 657                 prev->next = inst->next;
 658         else
 659                 instance_list = inst->next;
 660         if (verbose > 1)
 661                 printf(_("Finished with %s (exit status %d)\n"),
 662                        inst->device, inst->exit_status);
 663         num_running--;
 664         return inst;
 665 }
 666
 667 #define FLAG_WAIT_ALL           0
 668 #define FLAG_WAIT_ATLEAST_ONE   1
 669 /*
 670  * Wait until all executing child processes have exited; return the
 671  * logical OR of all of their exit code values.
 672  */
 673 static int wait_many(int flags)
 674 {
 675         struct fsck_instance *inst;
 676         int     global_status = 0;
 677         int     wait_flags = 0;
 678
 679         while ((inst = wait_one(wait_flags))) {
 680                 global_status |= inst->exit_status;
 681                 free_instance(inst);
 682 #ifdef RANDOM_DEBUG
 683                 if (noexecute && (flags & WNOHANG) && !(random() % 3))
 684                         break;
 685 #endif
 686                 if (flags & FLAG_WAIT_ATLEAST_ONE)
 687                         wait_flags = WNOHANG;
 688         }
 689         return global_status;
 690 }
 691
 692 /*
 693  * Run the fsck program on a particular device
 694  *
 695  * If the type is specified using -t, and it isn't prefixed with "no"
 696  * (as in "noext2") and only one filesystem type is specified, then
 697  * use that type regardless of what is specified in /etc/fstab.
 698  *
 699  * If the type isn't specified by the user, then use either the type
 700  * specified in /etc/fstab, or DEFAULT_FSTYPE.
 701  */
 702 static void fsck_device(struct fs_info *fs, int interactive)
 703 {
 704         const char *type;
 705         int retval;
 706
 707         interpret_type(fs);
 708
 709         if (strcmp(fs->type, "auto") != 0)
 710                 type = fs->type;
 711         else if (fstype && strncmp(fstype, "no", 2) &&
 712             strncmp(fstype, "opts=", 5) && strncmp(fstype, "loop", 4) &&
 713             !strchr(fstype, ','))
 714                 type = fstype;
 715         else
 716                 type = DEFAULT_FSTYPE;
 717
 718         num_running++;
 719         retval = execute(type, fs->device, fs->mountpt, interactive);
 720         if (retval) {
 721                 fprintf(stderr, _("%s: Error %d while executing fsck.%s "
 722                         "for %s\n"), progname, retval, type, fs->device);
 723                 num_running--;
 724         }
 725 }
 726
 727
 728 /*
 729  * Deal with the fsck -t argument.
 730  */
 731 static struct fs_type_compile {
 732         char **list;
 733         int *type;
 734         int  negate;
 735 } fs_type_compiled;
 736
 737 #define FS_TYPE_NORMAL  0
 738 #define FS_TYPE_OPT     1
 739 #define FS_TYPE_NEGOPT  2
 740
 741 static const char *fs_type_syntax_error =
 742 N_("Either all or none of the filesystem types passed to -t must be prefixed\n"
 743    "with 'no' or '!'.\n");
 744
 745 static void compile_fs_type(char *fs_type, struct fs_type_compile *cmp)
 746 {
 747         char    *cp, *list, *s;
 748         int     num = 2;
 749         int     negate, first_negate = 1;
 750
 751         if (fs_type) {
 752                 for (cp=fs_type; *cp; cp++) {
 753                         if (*cp == ',')
 754                                 num++;
 755                 }
 756         }
 757
 758         cmp->list = malloc(num * sizeof(char *));
 759         cmp->type = malloc(num * sizeof(int));
 760         if (!cmp->list || !cmp->type) {
 761                 fputs(_("Couldn't allocate memory for filesystem types\n"),
 762                       stderr);
 763                 exit(EXIT_ERROR);
 764         }
 765         memset(cmp->list, 0, num * sizeof(char *));
 766         memset(cmp->type, 0, num * sizeof(int));
 767         cmp->negate = 0;
 768
 769         if (!fs_type)
 770                 return;
 771
 772         list = string_copy(fs_type);
 773         num = 0;
 774         s = strtok(list, ",");
 775         while(s) {
 776                 negate = 0;
 777                 if (strncmp(s, "no", 2) == 0) {
 778                         s += 2;
 779                         negate = 1;
 780                 } else if (*s == '!') {
 781                         s++;
 782                         negate = 1;
 783                 }
 784                 if (strcmp(s, "loop") == 0)
 785                         /* loop is really short-hand for opts=loop */
 786                         goto loop_special_case;
 787                 else if (strncmp(s, "opts=", 5) == 0) {
 788                         s += 5;
 789                 loop_special_case:
 790                         cmp->type[num] = negate ? FS_TYPE_NEGOPT : FS_TYPE_OPT;
 791                 } else {
 792                         if (first_negate) {
 793                                 cmp->negate = negate;
 794                                 first_negate = 0;
 795                         }
 796                         if ((negate && !cmp->negate) ||
 797                             (!negate && cmp->negate)) {
 798                                 fputs(_(fs_type_syntax_error), stderr);
 799                                 exit(EXIT_USAGE);
 800                         }
 801                 }
 802 #if 0
 803                 printf("Adding %s to list (type %d).\n", s, cmp->type[num]);
 804 #endif
 805                 cmp->list[num++] = string_copy(s);
 806                 s = strtok(NULL, ",");
 807         }
 808         free(list);
 809 }
 810
 811 /*
 812  * This function returns true if a particular option appears in a
 813  * comma-delimited options list
 814  */
 815 static int opt_in_list(const char *opt, char *optlist)
 816 {
 817         char    *list, *s;
 818
 819         if (!optlist)
 820                 return 0;
 821         list = string_copy(optlist);
 822
 823         s = strtok(list, ",");
 824         while(s) {
 825                 if (strcmp(s, opt) == 0) {
 826                         free(list);
 827                         return 1;
 828                 }
 829                 s = strtok(NULL, ",");
 830         }
 831         free(list);
 832         return 0;
 833 }
 834
 835 /* See if the filesystem matches the criteria given by the -t option */
 836 static int fs_match(struct fs_info *fs, struct fs_type_compile *cmp)
 837 {
 838         int n, ret = 0, checked_type = 0;
 839         char *cp;
 840
 841         if (cmp->list == 0 || cmp->list[0] == 0)
 842                 return 1;
 843
 844         for (n=0; (cp = cmp->list[n]); n++) {
 845                 switch (cmp->type[n]) {
 846                 case FS_TYPE_NORMAL:
 847                         checked_type++;
 848                         if (strcmp(cp, fs->type) == 0) {
 849                                 ret = 1;
 850                         }
 851                         break;
 852                 case FS_TYPE_NEGOPT:
 853                         if (opt_in_list(cp, fs->opts))
 854                                 return 0;
 855                         break;
 856                 case FS_TYPE_OPT:
 857                         if (!opt_in_list(cp, fs->opts))
 858                                 return 0;
 859                         break;
 860                 }
 861         }
 862         if (checked_type == 0)
 863                 return 1;
 864         return (cmp->negate ? !ret : ret);
 865 }
 866
 867 /* Check if we should ignore this filesystem. */
 868 static int ignore(struct fs_info *fs)
 869 {
 870         const char **ip;
 871         int wanted = 0;
 872
 873         /*
 874          * If the pass number is 0, ignore it.
 875          */
 876         if (fs->passno == 0)
 877                 return 1;
 878
 879         /*
 880          * If this is a bind mount, ignore it.
 881          */
 882         if (opt_in_list("bind", fs->opts)) {
 883                 fprintf(stderr,
 884                         _("%s: skipping bad line in /etc/fstab: bind mount with nonzero fsck pass number\n"),
 885                         fs->mountpt);
 886                 return 1;
 887         }
 888
 889         interpret_type(fs);
 890
 891         /*
 892          * If a specific fstype is specified, and it doesn't match,
 893          * ignore it.
 894          */
 895         if (!fs_match(fs, &fs_type_compiled)) return 1;
 896
 897         /* Are we ignoring this type? */
 898         for(ip = ignored_types; *ip; ip++)
 899                 if (strcmp(fs->type, *ip) == 0) return 1;
 900
 901         /* Do we really really want to check this fs? */
 902         for(ip = really_wanted; *ip; ip++)
 903                 if (strcmp(fs->type, *ip) == 0) {
 904                         wanted = 1;
 905                         break;
 906                 }
 907
 908         /* See if the <fsck.fs> program is available. */
 909         if (find_fsck(fs->type) == NULL) {
 910                 if (wanted)
 911                         fprintf(stderr, _("fsck: cannot check %s: fsck.%s not found\n"),
 912                                 fs->device, fs->type);
 913                 return 1;
 914         }
 915
 916         /* We can and want to check this file system type. */
 917         return 0;
 918 }
 919
 920 /*
 921  * Returns TRUE if a partition on the same disk is already being
 922  * checked.
 923  */
 924 static int device_already_active(char *device)
 925 {
 926         struct fsck_instance *inst;
 927         char *base;
 928
 929         if (force_all_parallel)
 930                 return 0;
 931
 932 #ifdef BASE_MD
 933         /* Don't check a soft raid disk with any other disk */
 934         if (instance_list &&
 935             (!strncmp(instance_list->device, BASE_MD, sizeof(BASE_MD)-1) ||
 936              !strncmp(device, BASE_MD, sizeof(BASE_MD)-1)))
 937                 return 1;
 938 #endif
 939
 940         base = base_device(device);
 941         /*
 942          * If we don't know the base device, assume that the device is
 943          * already active if there are any fsck instances running.
 944          */
 945         if (!base)
 946                 return (instance_list != 0);
 947         for (inst = instance_list; inst; inst = inst->next) {
 948                 if (!inst->base_device || !strcmp(base, inst->base_device)) {
 949                         free(base);
 950                         return 1;
 951                 }
 952         }
 953         free(base);
 954         return 0;
 955 }
 956
 957 /* Check all file systems, using the /etc/fstab table. */
 958 static int check_all(NOARGS)
 959 {
 960         struct fs_info *fs = NULL;
 961         int status = EXIT_OK;
 962         int not_done_yet = 1;
 963         int passno = 1;
 964         int pass_done;
 965
 966         if (verbose)
 967                 fputs(_("Checking all file systems.\n"), stdout);
 968
 969         /*
 970          * Do an initial scan over the filesystem; mark filesystems
 971          * which should be ignored as done, and resolve any "auto"
 972          * filesystem types (done as a side-effect of calling ignore()).
 973          */
 974         for (fs = filesys_info; fs; fs = fs->next) {
 975                 if (ignore(fs))
 976                         fs->flags |= FLAG_DONE;
 977         }
 978
 979         /*
 980          * Find and check the root filesystem.
 981          */
 982         if (!parallel_root) {
 983                 for (fs = filesys_info; fs; fs = fs->next) {
 984                         if (!strcmp(fs->mountpt, "/"))
 985                                 break;
 986                 }
 987                 if (fs) {
 988                         if (!skip_root && !ignore(fs) &&
 989                             !(ignore_mounted && is_mounted(fs->device))) {
 990                                 fsck_device(fs, 1);
 991                                 status |= wait_many(FLAG_WAIT_ALL);
 992                                 if (status > EXIT_NONDESTRUCT)
 993                                         return status;
 994                         }
 995                         fs->flags |= FLAG_DONE;
 996                 }
 997         }
 998         /*
 999          * This is for the bone-headed user who enters the root
1000          * filesystem twice.  Skip root will skep all root entries.
1001          */
1002         if (skip_root)
1003                 for (fs = filesys_info; fs; fs = fs->next)
1004                         if (!strcmp(fs->mountpt, "/"))
1005                                 fs->flags |= FLAG_DONE;
1006
1007         while (not_done_yet) {
1008                 not_done_yet = 0;
1009                 pass_done = 1;
1010
1011                 for (fs = filesys_info; fs; fs = fs->next) {
1012                         if (cancel_requested)
1013                                 break;
1014                         if (fs->flags & FLAG_DONE)
1015                                 continue;
1016                         /*
1017                          * If the filesystem's pass number is higher
1018                          * than the current pass number, then we don't
1019                          * do it yet.
1020                          */
1021                         if (fs->passno > passno) {
1022                                 not_done_yet++;
1023                                 continue;
1024                         }
1025                         if (ignore_mounted && is_mounted(fs->device)) {
1026                                 fs->flags |= FLAG_DONE;
1027                                 continue;
1028                         }
1029                         /*
1030                          * If a filesystem on a particular device has
1031                          * already been spawned, then we need to defer
1032                          * this to another pass.
1033                          */
1034                         if (device_already_active(fs->device)) {
1035                                 pass_done = 0;
1036                                 continue;
1037                         }
1038                         /*
1039                          * Spawn off the fsck process
1040                          */
1041                         fsck_device(fs, serialize);
1042                         fs->flags |= FLAG_DONE;
1043
1044                         /*
1045                          * Only do one filesystem at a time, or if we
1046                          * have a limit on the number of fsck's extant
1047                          * at one time, apply that limit.
1048                          */
1049                         if (serialize ||
1050                             (max_running && (num_running >= max_running))) {
1051                                 pass_done = 0;
1052                                 break;
1053                         }
1054                 }
1055                 if (cancel_requested)
1056                         break;
1057                 if (verbose > 1)
1058                         printf(_("--waiting-- (pass %d)\n"), passno);
1059                 status |= wait_many(pass_done ? FLAG_WAIT_ALL :
1060                                     FLAG_WAIT_ATLEAST_ONE);
1061                 if (pass_done) {
1062                         if (verbose > 1)
1063                                 printf("----------------------------------\n");
1064                         passno++;
1065                 } else
1066                         not_done_yet++;
1067         }
1068         if (cancel_requested && !kill_sent) {
1069                 kill_all(SIGTERM);
1070                 kill_sent++;
1071         }
1072         status |= wait_many(FLAG_WAIT_ATLEAST_ONE);
1073         return status;
1074 }
1075
1076 static void usage(NOARGS)
1077 {
1078         fputs(_("Usage: fsck [-AMNPRTV] [ -C [ fd ] ] [-t fstype] [fs-options] [filesys ...]\n"), stderr);
1079         exit(EXIT_USAGE);
1080 }
1081
1082 #ifdef HAVE_SIGNAL_H
1083 static void signal_cancel(int sig FSCK_ATTR((unused)))
1084 {
1085         cancel_requested++;
1086 }
1087 #endif
1088
1089 static void PRS(int argc, char *argv[])
1090 {
1091         int     i, j;
1092         char    *arg, *dev, *tmp = 0;
1093         char    options[128];
1094         int     opt = 0;
1095         int     opts_for_fsck = 0;
1096 #ifdef HAVE_SIGNAL_H
1097         struct sigaction        sa;
1098
1099         /*
1100          * Set up signal action
1101          */
1102         memset(&sa, 0, sizeof(struct sigaction));
1103         sa.sa_handler = signal_cancel;
1104         sigaction(SIGINT, &sa, 0);
1105         sigaction(SIGTERM, &sa, 0);
1106 #endif
1107
1108         num_devices = 0;
1109         num_args = 0;
1110         instance_list = 0;
1111
1112         progname = argv[0];
1113
1114         for (i=1; i < argc; i++) {
1115                 arg = argv[i];
1116                 if (!arg)
1117                         continue;
1118                 if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) {
1119                         if (num_devices >= MAX_DEVICES) {
1120                                 fprintf(stderr, _("%s: too many devices\n"),
1121                                         progname);
1122                                 exit(EXIT_ERROR);
1123                         }
1124                         dev = blkid_get_devname(cache, arg, NULL);
1125                         if (!dev && strchr(arg, '=')) {
1126                                 /*
1127                                  * Check to see if we failed because
1128                                  * /proc/partitions isn't found.
1129                                  */
1130                                 if (access("/proc/partitions", R_OK) < 0) {
1131                                         fprintf(stderr, "Couldn't open /proc/partitions: %s\n",
1132                                                 strerror(errno));
1133                                         fprintf(stderr, "Is /proc mounted?\n");
1134                                         exit(EXIT_ERROR);
1135                                 }
1136                                 /*
1137                                  * Check to see if this is because
1138                                  * we're not running as root
1139                                  */
1140                                 if (geteuid())
1141                                         fprintf(stderr,
1142                 "Must be root to scan for matching filesystems: %s\n", arg);
1143                                 else
1144                                         fprintf(stderr,
1145                 "Couldn't find matching filesystem: %s\n", arg);
1146                                 exit(EXIT_ERROR);
1147                         }
1148                         devices[num_devices++] = dev ? dev : string_copy(arg);
1149                         continue;
1150                 }
1151                 if (arg[0] != '-' || opts_for_fsck) {
1152                         if (num_args >= MAX_ARGS) {
1153                                 fprintf(stderr, _("%s: too many arguments\n"),
1154                                         progname);
1155                                 exit(EXIT_ERROR);
1156                         }
1157                         args[num_args++] = string_copy(arg);
1158                         continue;
1159                 }
1160                 for (j=1; arg[j]; j++) {
1161                         if (opts_for_fsck) {
1162                                 options[++opt] = arg[j];
1163                                 continue;
1164                         }
1165                         switch (arg[j]) {
1166                         case 'A':
1167                                 doall++;
1168                                 break;
1169                         case 'C':
1170                                 progress++;
1171                                 if (arg[j+1]) {
1172                                         progress_fd = string_to_int(arg+j+1);
1173                                         if (progress_fd < 0)
1174                                                 progress_fd = 0;
1175                                         else
1176                                                 goto next_arg;
1177                                 } else if ((i+1) < argc &&
1178                                            !strncmp(argv[i+1], "-", 1) == 0) {
1179                                         progress_fd = string_to_int(argv[i]);
1180                                         if (progress_fd < 0)
1181                                                 progress_fd = 0;
1182                                         else {
1183                                                 ++i;
1184                                                 goto next_arg;
1185                                         }
1186                                 }
1187                                 break;
1188                         case 'V':
1189                                 verbose++;
1190                                 break;
1191                         case 'N':
1192                                 noexecute++;
1193                                 break;
1194                         case 'R':
1195                                 skip_root++;
1196                                 break;
1197                         case 'T':
1198                                 notitle++;
1199                                 break;
1200                         case 'M':
1201                                 ignore_mounted++;
1202                                 break;
1203                         case 'P':
1204                                 parallel_root++;
1205                                 break;
1206                         case 's':
1207                                 serialize++;
1208                                 break;
1209                         case 't':
1210                                 tmp = 0;
1211                                 if (fstype)
1212                                         usage();
1213                                 if (arg[j+1])
1214                                         tmp = arg+j+1;
1215                                 else if ((i+1) < argc)
1216                                         tmp = argv[++i];
1217                                 else
1218                                         usage();
1219                                 fstype = string_copy(tmp);
1220                                 compile_fs_type(fstype, &fs_type_compiled);
1221                                 goto next_arg;
1222                         case '-':
1223                                 opts_for_fsck++;
1224                                 break;
1225                         case '?':
1226                                 usage();
1227                                 break;
1228                         default:
1229                                 options[++opt] = arg[j];
1230                                 break;
1231                         }
1232                 }
1233         next_arg:
1234                 if (opt) {
1235                         options[0] = '-';
1236                         options[++opt] = '\0';
1237                         if (num_args >= MAX_ARGS) {
1238                                 fprintf(stderr,
1239                                         _("%s: too many arguments\n"),
1240                                         progname);
1241                                 exit(EXIT_ERROR);
1242                         }
1243                         args[num_args++] = string_copy(options);
1244                         opt = 0;
1245                 }
1246         }
1247         if (getenv("FSCK_FORCE_ALL_PARALLEL"))
1248                 force_all_parallel++;
1249         if ((tmp = getenv("FSCK_MAX_INST")))
1250             max_running = atoi(tmp);
1251 }
1252
1253 int main(int argc, char *argv[])
1254 {
1255         int i, status = 0;
1256         int interactive = 0;
1257         char *oldpath = getenv("PATH");
1258         const char *fstab;
1259         struct fs_info *fs;
1260
1261         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
1262         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
1263
1264 #ifdef ENABLE_NLS
1265         setlocale(LC_MESSAGES, "");
1266         setlocale(LC_CTYPE, "");
1267         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1268         textdomain(NLS_CAT_NAME);
1269 #endif
1270         blkid_get_cache(&cache, NULL);
1271         PRS(argc, argv);
1272
1273         if (!notitle)
1274                 printf("fsck %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1275
1276         fstab = getenv("FSTAB_FILE");
1277         if (!fstab)
1278                 fstab = _PATH_MNTTAB;
1279         load_fs_info(fstab);
1280
1281         /* Update our search path to include uncommon directories. */
1282         if (oldpath) {
1283                 fsck_path = malloc (strlen (fsck_prefix_path) + 1 +
1284                                     strlen (oldpath) + 1);
1285                 if (!fsck_path) {
1286                         fprintf(stderr, "%s: Unable to allocate memory for fsck_path\n", progname);
1287                         exit(EXIT_ERROR);
1288                 }
1289                 strcpy (fsck_path, fsck_prefix_path);
1290                 strcat (fsck_path, ":");
1291                 strcat (fsck_path, oldpath);
1292         } else {
1293                 fsck_path = string_copy(fsck_prefix_path);
1294         }
1295
1296         if ((num_devices == 1) || (serialize))
1297                 interactive = 1;
1298
1299         /* If -A was specified ("check all"), do that! */
1300         if (doall)
1301                 return check_all();
1302
1303         if (num_devices == 0) {
1304                 serialize++;
1305                 interactive++;
1306                 return check_all();
1307         }
1308         for (i = 0 ; i < num_devices; i++) {
1309                 if (cancel_requested) {
1310                         if (!kill_sent) {
1311                                 kill_all(SIGTERM);
1312                                 kill_sent++;
1313                         }
1314                         break;
1315                 }
1316                 fs = lookup(devices[i]);
1317                 if (!fs) {
1318                         fs = create_fs_device(devices[i], 0, "auto",
1319                                               0, -1, -1);
1320                         if (!fs)
1321                                 continue;
1322                 }
1323                 if (ignore_mounted && is_mounted(fs->device))
1324                         continue;
1325                 fsck_device(fs, interactive);
1326                 if (serialize ||
1327                     (max_running && (num_running >= max_running))) {
1328                         struct fsck_instance *inst;
1329
1330                         inst = wait_one(0);
1331                         if (inst) {
1332                                 status |= inst->exit_status;
1333                                 free_instance(inst);
1334                         }
1335                         if (verbose > 1)
1336                                 printf("----------------------------------\n");
1337                 }
1338         }
1339         status |= wait_many(FLAG_WAIT_ALL);
1340         free(fsck_path);
1341         blkid_put_cache(cache);
1342         return status;
1343 }