fsck/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  * Copyright (C) 2009 Karel Zak <kzak@redhat.com>
  23  *
  24  * This file may be redistributed under the terms of the GNU Public
  25  * License.
  26  */
  27
  28 #define _XOPEN_SOURCE 600 /* for inclusion of sa_handler in Solaris */
  29
  30 #include <sys/types.h>
  31 #include <sys/wait.h>
  32 #include <sys/signal.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 #include <stdlib.h>
  40 #include <errno.h>
  41 #include <paths.h>
  42 #include <unistd.h>
  43 #include <errno.h>
  44 #include <malloc.h>
  45 #include <signal.h>
  46
  47 #include "fsprobe.h"
  48
  49 #include "nls.h"
  50 #include "pathnames.h"
  51 #include "ismounted.h"
  52
  53 #include "fsck.h"
  54
  55 static const char *ignored_types[] = {
  56         "ignore",
  57         "iso9660",
  58         "nfs",
  59         "proc",
  60         "sw",
  61         "swap",
  62         "tmpfs",
  63         "devpts",
  64         NULL
  65 };
  66
  67 static const char *really_wanted[] = {
  68         "minix",
  69         "ext2",
  70         "ext3",
  71         "ext4",
  72         "ext4dev",
  73         "jfs",
  74         "reiserfs",
  75         "xiafs",
  76         "xfs",
  77         NULL
  78 };
  79
  80 #define BASE_MD "/dev/md"
  81
  82 /*
  83  * Global variables for options
  84  */
  85 char *devices[MAX_DEVICES];
  86 char *args[MAX_ARGS];
  87 int num_devices, num_args;
  88
  89 int verbose = 0;
  90 int doall = 0;
  91 int noexecute = 0;
  92 int serialize = 0;
  93 int skip_root = 0;
  94 int ignore_mounted = 0;
  95 int notitle = 0;
  96 int parallel_root = 0;
  97 int progress = 0;
  98 int progress_fd = 0;
  99 int force_all_parallel = 0;
 100 int num_running = 0;
 101 int max_running = 0;
 102 volatile int cancel_requested = 0;
 103 int kill_sent = 0;
 104 char *progname;
 105 char *fstype = NULL;
 106 struct fs_info *filesys_info = NULL, *filesys_last = NULL;
 107 struct fsck_instance *instance_list;
 108 const char *fsck_prefix_path = "/sbin:/sbin/fs.d:/sbin/fs:/etc/fs:/etc";
 109 char *fsck_path = 0;
 110
 111 static char *string_copy(const char *s)
 112 {
 113         char    *ret;
 114
 115         if (!s)
 116                 return 0;
 117         ret = malloc(strlen(s)+1);
 118         if (ret)
 119                 strcpy(ret, s);
 120         return ret;
 121 }
 122
 123 static int string_to_int(const char *s)
 124 {
 125         long l;
 126         char *p;
 127
 128         l = strtol(s, &p, 0);
 129         if (*p || l == LONG_MIN || l == LONG_MAX || l < 0 || l > INT_MAX)
 130                 return -1;
 131         else
 132                 return (int) l;
 133 }
 134
 135 static int ignore(struct fs_info *);
 136
 137 static char *skip_over_blank(char *cp)
 138 {
 139         while (*cp && isspace(*cp))
 140                 cp++;
 141         return cp;
 142 }
 143
 144 static char *skip_over_word(char *cp)
 145 {
 146         while (*cp && !isspace(*cp))
 147                 cp++;
 148         return cp;
 149 }
 150
 151 static void strip_line(char *line)
 152 {
 153         char    *p;
 154
 155         while (*line) {
 156                 p = line + strlen(line) - 1;
 157                 if ((*p == '\n') || (*p == '\r'))
 158                         *p = 0;
 159                 else
 160                         break;
 161         }
 162 }
 163
 164 static char *parse_word(char **buf)
 165 {
 166         char *word, *next;
 167
 168         word = *buf;
 169         if (*word == 0)
 170                 return 0;
 171
 172         word = skip_over_blank(word);
 173         next = skip_over_word(word);
 174         if (*next)
 175                 *next++ = 0;
 176         *buf = next;
 177         return word;
 178 }
 179
 180 static void parse_escape(char *word)
 181 {
 182         char    *p, *q;
 183         int     ac, i;
 184
 185         if (!word)
 186                 return;
 187
 188         for (p = word, q = word; *p; p++, q++) {
 189                 *q = *p;
 190                 if (*p != '\\')
 191                         continue;
 192                 if (*++p == 0)
 193                         break;
 194                 if (*p == 't') {
 195                         *q = '\t';
 196                         continue;
 197                 }
 198                 if (*p == 'n') {
 199                         *q = '\n';
 200                         continue;
 201                 }
 202                 if (!isdigit(*p)) {
 203                         *q = *p;
 204                         continue;
 205                 }
 206                 ac = 0;
 207                 for (i = 0; i < 3; i++, p++) {
 208                         if (!isdigit(*p))
 209                                 break;
 210                         ac = (ac * 8) + (*p - '0');
 211                 }
 212                 *q = ac;
 213                 p--;
 214         }
 215         *q = 0;
 216 }
 217
 218 static void free_instance(struct fsck_instance *i)
 219 {
 220         free(i->prog);
 221         free(i->device);
 222         free(i->base_device);
 223         free(i);
 224         return;
 225 }
 226
 227 static struct fs_info *create_fs_device(const char *device, const char *mntpnt,
 228                                         const char *type, const char *opts,
 229                                         int freq, int passno)
 230 {
 231         struct fs_info *fs;
 232
 233         if (!(fs = malloc(sizeof(struct fs_info))))
 234                 return NULL;
 235
 236         fs->device = string_copy(device);
 237         fs->mountpt = string_copy(mntpnt);
 238         fs->type = string_copy(type);
 239         fs->opts = string_copy(opts ? opts : "");
 240         fs->freq = freq;
 241         fs->passno = passno;
 242         fs->flags = 0;
 243         fs->next = NULL;
 244
 245         if (!filesys_info)
 246                 filesys_info = fs;
 247         else
 248                 filesys_last->next = fs;
 249         filesys_last = fs;
 250
 251         return fs;
 252 }
 253
 254
 255
 256 static int parse_fstab_line(char *line, struct fs_info **ret_fs)
 257 {
 258         char    *dev, *device, *mntpnt, *type, *opts, *freq, *passno, *cp;
 259         struct fs_info *fs;
 260
 261         *ret_fs = 0;
 262         strip_line(line);
 263         cp = line;
 264
 265         device = parse_word(&cp);
 266         if (!device || *device == '#')
 267                 return 0;       /* Ignore blank lines and comments */
 268         mntpnt = parse_word(&cp);
 269         type = parse_word(&cp);
 270         opts = parse_word(&cp);
 271         freq = parse_word(&cp);
 272         passno = parse_word(&cp);
 273
 274         if (!mntpnt || !type)
 275                 return -1;
 276
 277         parse_escape(device);
 278         parse_escape(mntpnt);
 279         parse_escape(type);
 280         parse_escape(opts);
 281         parse_escape(freq);
 282         parse_escape(passno);
 283
 284         dev = fsprobe_get_devname_by_spec(device);
 285         if (dev)
 286                 device = dev;
 287
 288         if (strchr(type, ','))
 289                 type = 0;
 290
 291         fs = create_fs_device(device, mntpnt, type ? type : "auto", opts,
 292                               freq ? atoi(freq) : -1,
 293                               passno ? atoi(passno) : -1);
 294         free(dev);
 295
 296         if (!fs)
 297                 return -1;
 298         *ret_fs = fs;
 299         return 0;
 300 }
 301
 302 static void interpret_type(struct fs_info *fs)
 303 {
 304         char    *t;
 305
 306         if (strcmp(fs->type, "auto") != 0)
 307                 return;
 308         t = fsprobe_get_fstype_by_devname(fs->device);
 309         if (t) {
 310                 free(fs->type);
 311                 fs->type = t;
 312         }
 313 }
 314
 315 /*
 316  * Load the filesystem database from /etc/fstab
 317  */
 318 static void load_fs_info(const char *filename)
 319 {
 320         FILE    *f;
 321         char    buf[1024];
 322         int     lineno = 0;
 323         int     old_fstab = 1;
 324         struct fs_info *fs;
 325
 326         if ((f = fopen(filename, "r")) == NULL) {
 327                 fprintf(stderr, _("WARNING: couldn't open %s: %s\n"),
 328                         filename, strerror(errno));
 329                 return;
 330         }
 331         while (!feof(f)) {
 332                 lineno++;
 333                 if (!fgets(buf, sizeof(buf), f))
 334                         break;
 335                 buf[sizeof(buf)-1] = 0;
 336                 if (parse_fstab_line(buf, &fs) < 0) {
 337                         fprintf(stderr, _("WARNING: bad format "
 338                                 "on line %d of %s\n"), lineno, filename);
 339                         continue;
 340                 }
 341                 if (!fs)
 342                         continue;
 343                 if (fs->passno < 0)
 344                         fs->passno = 0;
 345                 else
 346                         old_fstab = 0;
 347         }
 348
 349         fclose(f);
 350
 351         if (old_fstab && filesys_info) {
 352                 fputs(_(
 353                 "WARNING: Your /etc/fstab does not contain the fsck passno\n"
 354                 "       field.  I will kludge around things for you, but you\n"
 355                 "       should fix your /etc/fstab file as soon as you can.\n\n"), stderr);
 356
 357                 for (fs = filesys_info; fs; fs = fs->next) {
 358                         fs->passno = 1;
 359                 }
 360         }
 361 }
 362
 363 /* Lookup filesys in /etc/fstab and return the corresponding entry. */
 364 static struct fs_info *lookup(char *filesys)
 365 {
 366         struct fs_info *fs;
 367
 368         /* No filesys name given. */
 369         if (filesys == NULL)
 370                 return NULL;
 371
 372         for (fs = filesys_info; fs; fs = fs->next) {
 373                 if (!strcmp(filesys, fs->device) ||
 374                     (fs->mountpt && !strcmp(filesys, fs->mountpt)))
 375                         break;
 376         }
 377
 378         return fs;
 379 }
 380
 381 /* Find fsck program for a given fs type. */
 382 static char *find_fsck(char *type)
 383 {
 384   char *s;
 385   const char *tpl;
 386   static char prog[256];
 387   char *p = string_copy(fsck_path);
 388   struct stat st;
 389
 390   /* Are we looking for a program or just a type? */
 391   tpl = (strncmp(type, "fsck.", 5) ? "%s/fsck.%s" : "%s/%s");
 392
 393   for(s = strtok(p, ":"); s; s = strtok(NULL, ":")) {
 394         sprintf(prog, tpl, s, type);
 395         if (stat(prog, &st) == 0) break;
 396   }
 397   free(p);
 398   return(s ? prog : NULL);
 399 }
 400
 401 static int progress_active(NOARGS)
 402 {
 403         struct fsck_instance *inst;
 404
 405         for (inst = instance_list; inst; inst = inst->next) {
 406                 if (inst->flags & FLAG_DONE)
 407                         continue;
 408                 if (inst->flags & FLAG_PROGRESS)
 409                         return 1;
 410         }
 411         return 0;
 412 }
 413
 414 /*
 415  * Execute a particular fsck program, and link it into the list of
 416  * child processes we are waiting for.
 417  */
 418 static int execute(const char *type, const char *device, const char *mntpt,
 419                    int interactive)
 420 {
 421         char *s, *argv[80], prog[80];
 422         int  argc, i;
 423         struct fsck_instance *inst, *p;
 424         pid_t   pid;
 425
 426         inst = malloc(sizeof(struct fsck_instance));
 427         if (!inst)
 428                 return ENOMEM;
 429         memset(inst, 0, sizeof(struct fsck_instance));
 430
 431         sprintf(prog, "fsck.%s", type);
 432         argv[0] = string_copy(prog);
 433         argc = 1;
 434
 435         for (i=0; i <num_args; i++)
 436                 argv[argc++] = string_copy(args[i]);
 437
 438         if (progress) {
 439                 if ((strcmp(type, "ext2") == 0) ||
 440                     (strcmp(type, "ext3") == 0) ||
 441                     (strcmp(type, "ext4") == 0) ||
 442                     (strcmp(type, "ext4dev") == 0)) {
 443                         char tmp[80];
 444
 445                         tmp[0] = 0;
 446                         if (!progress_active()) {
 447                                 snprintf(tmp, 80, "-C%d", progress_fd);
 448                                 inst->flags |= FLAG_PROGRESS;
 449                         } else if (progress_fd)
 450                                 snprintf(tmp, 80, "-C%d", progress_fd * -1);
 451                         if (tmp[0])
 452                                 argv[argc++] = string_copy(tmp);
 453                 }
 454         }
 455
 456         argv[argc++] = string_copy(device);
 457         argv[argc] = 0;
 458
 459         s = find_fsck(prog);
 460         if (s == NULL) {
 461                 fprintf(stderr, _("fsck: %s: not found\n"), prog);
 462                 free(inst);
 463                 return ENOENT;
 464         }
 465
 466         if (verbose || noexecute) {
 467                 printf("[%s (%d) -- %s] ", s, num_running,
 468                        mntpt ? mntpt : device);
 469                 for (i=0; i < argc; i++)
 470                         printf("%s ", argv[i]);
 471                 printf("\n");
 472         }
 473
 474         /* Fork and execute the correct program. */
 475         if (noexecute)
 476                 pid = -1;
 477         else if ((pid = fork()) < 0) {
 478                 perror("fork");
 479                 free(inst);
 480                 return errno;
 481         } else if (pid == 0) {
 482                 if (!interactive)
 483                         close(0);
 484                 (void) execv(s, argv);
 485                 perror(argv[0]);
 486                 free(inst);
 487                 exit(EXIT_ERROR);
 488         }
 489
 490         for (i=0; i < argc; i++)
 491                 free(argv[i]);
 492
 493         inst->pid = pid;
 494         inst->prog = string_copy(prog);
 495         inst->type = string_copy(type);
 496         inst->device = string_copy(device);
 497         inst->base_device = base_device(device);
 498         inst->start_time = time(0);
 499         inst->next = NULL;
 500
 501         /*
 502          * Find the end of the list, so we add the instance on at the end.
 503          */
 504         for (p = instance_list; p && p->next; p = p->next);
 505
 506         if (p)
 507                 p->next = inst;
 508         else
 509                 instance_list = inst;
 510
 511         return 0;
 512 }
 513
 514 /*
 515  * Send a signal to all outstanding fsck child processes
 516  */
 517 static int kill_all(int signum)
 518 {
 519         struct fsck_instance *inst;
 520         int     n = 0;
 521
 522         for (inst = instance_list; inst; inst = inst->next) {
 523                 if (inst->flags & FLAG_DONE)
 524                         continue;
 525                 kill(inst->pid, signum);
 526                 n++;
 527         }
 528         return n;
 529 }
 530
 531 /*
 532  * Wait for one child process to exit; when it does, unlink it from
 533  * the list of executing child processes, and return it.
 534  */
 535 static struct fsck_instance *wait_one(int flags)
 536 {
 537         int     status;
 538         int     sig;
 539         struct fsck_instance *inst, *inst2, *prev;
 540         pid_t   pid;
 541
 542         if (!instance_list)
 543                 return NULL;
 544
 545         if (noexecute) {
 546                 inst = instance_list;
 547                 prev = 0;
 548 #ifdef RANDOM_DEBUG
 549                 while (inst->next && (random() & 1)) {
 550                         prev = inst;
 551                         inst = inst->next;
 552                 }
 553 #endif
 554                 inst->exit_status = 0;
 555                 goto ret_inst;
 556         }
 557
 558         /*
 559          * gcc -Wall fails saving throw against stupidity
 560          * (inst and prev are thought to be uninitialized variables)
 561          */
 562         inst = prev = NULL;
 563
 564         do {
 565                 pid = waitpid(-1, &status, flags);
 566                 if (cancel_requested && !kill_sent) {
 567                         kill_all(SIGTERM);
 568                         kill_sent++;
 569                 }
 570                 if ((pid == 0) && (flags & WNOHANG))
 571                         return NULL;
 572                 if (pid < 0) {
 573                         if ((errno == EINTR) || (errno == EAGAIN))
 574                                 continue;
 575                         if (errno == ECHILD) {
 576                                 fprintf(stderr,
 577                                         _("%s: wait: No more child process?!?\n"),
 578                                         progname);
 579                                 return NULL;
 580                         }
 581                         perror("wait");
 582                         continue;
 583                 }
 584                 for (prev = 0, inst = instance_list;
 585                      inst;
 586                      prev = inst, inst = inst->next) {
 587                         if (inst->pid == pid)
 588                                 break;
 589                 }
 590         } while (!inst);
 591
 592         if (WIFEXITED(status))
 593                 status = WEXITSTATUS(status);
 594         else if (WIFSIGNALED(status)) {
 595                 sig = WTERMSIG(status);
 596                 if (sig == SIGINT) {
 597                         status = EXIT_UNCORRECTED;
 598                 } else {
 599                         printf(_("Warning... %s for device %s exited "
 600                                "with signal %d.\n"),
 601                                inst->prog, inst->device, sig);
 602                         status = EXIT_ERROR;
 603                 }
 604         } else {
 605                 printf(_("%s %s: status is %x, should never happen.\n"),
 606                        inst->prog, inst->device, status);
 607                 status = EXIT_ERROR;
 608         }
 609         inst->exit_status = status;
 610         inst->flags |= FLAG_DONE;
 611         if (progress && (inst->flags & FLAG_PROGRESS) &&
 612             !progress_active()) {
 613                 for (inst2 = instance_list; inst2; inst2 = inst2->next) {
 614                         if (inst2->flags & FLAG_DONE)
 615                                 continue;
 616                         if (strcmp(inst2->type, "ext2") &&
 617                             strcmp(inst2->type, "ext3") &&
 618                             strcmp(inst2->type, "ext4") &&
 619                             strcmp(inst2->type, "ext4dev"))
 620                                 continue;
 621                         /*
 622                          * If we've just started the fsck, wait a tiny
 623                          * bit before sending the kill, to give it
 624                          * time to set up the signal handler
 625                          */
 626                         if (inst2->start_time < time(0)+2) {
 627                                 if (fork() == 0) {
 628                                         sleep(1);
 629                                         kill(inst2->pid, SIGUSR1);
 630                                         exit(0);
 631                                 }
 632                         } else
 633                                 kill(inst2->pid, SIGUSR1);
 634                         inst2->flags |= FLAG_PROGRESS;
 635                         break;
 636                 }
 637         }
 638 ret_inst:
 639         if (prev)
 640                 prev->next = inst->next;
 641         else
 642                 instance_list = inst->next;
 643         if (verbose > 1)
 644                 printf(_("Finished with %s (exit status %d)\n"),
 645                        inst->device, inst->exit_status);
 646         num_running--;
 647         return inst;
 648 }
 649
 650 #define FLAG_WAIT_ALL           0
 651 #define FLAG_WAIT_ATLEAST_ONE   1
 652 /*
 653  * Wait until all executing child processes have exited; return the
 654  * logical OR of all of their exit code values.
 655  */
 656 static int wait_many(int flags)
 657 {
 658         struct fsck_instance *inst;
 659         int     global_status = 0;
 660         int     wait_flags = 0;
 661
 662         while ((inst = wait_one(wait_flags))) {
 663                 global_status |= inst->exit_status;
 664                 free_instance(inst);
 665 #ifdef RANDOM_DEBUG
 666                 if (noexecute && (flags & WNOHANG) && !(random() % 3))
 667                         break;
 668 #endif
 669                 if (flags & FLAG_WAIT_ATLEAST_ONE)
 670                         wait_flags = WNOHANG;
 671         }
 672         return global_status;
 673 }
 674
 675 /*
 676  * Run the fsck program on a particular device
 677  *
 678  * If the type is specified using -t, and it isn't prefixed with "no"
 679  * (as in "noext2") and only one filesystem type is specified, then
 680  * use that type regardless of what is specified in /etc/fstab.
 681  *
 682  * If the type isn't specified by the user, then use either the type
 683  * specified in /etc/fstab, or DEFAULT_FSTYPE.
 684  */
 685 static void fsck_device(struct fs_info *fs, int interactive)
 686 {
 687         const char *type;
 688         int retval;
 689
 690         interpret_type(fs);
 691
 692         if (strcmp(fs->type, "auto") != 0)
 693                 type = fs->type;
 694         else if (fstype && strncmp(fstype, "no", 2) &&
 695             strncmp(fstype, "opts=", 5) && strncmp(fstype, "loop", 4) &&
 696             !strchr(fstype, ','))
 697                 type = fstype;
 698         else
 699                 type = DEFAULT_FSTYPE;
 700
 701         num_running++;
 702         retval = execute(type, fs->device, fs->mountpt, interactive);
 703         if (retval) {
 704                 fprintf(stderr, _("%s: Error %d while executing fsck.%s "
 705                         "for %s\n"), progname, retval, type, fs->device);
 706                 num_running--;
 707         }
 708 }
 709
 710
 711 /*
 712  * Deal with the fsck -t argument.
 713  */
 714 struct fs_type_compile {
 715         char **list;
 716         int *type;
 717         int  negate;
 718 } fs_type_compiled;
 719
 720 #define FS_TYPE_NORMAL  0
 721 #define FS_TYPE_OPT     1
 722 #define FS_TYPE_NEGOPT  2
 723
 724 static const char *fs_type_syntax_error =
 725 N_("Either all or none of the filesystem types passed to -t must be prefixed\n"
 726    "with 'no' or '!'.\n");
 727
 728 static void compile_fs_type(char *fs_type, struct fs_type_compile *cmp)
 729 {
 730         char    *cp, *list, *s;
 731         int     num = 2;
 732         int     negate, first_negate = 1;
 733
 734         if (fs_type) {
 735                 for (cp=fs_type; *cp; cp++) {
 736                         if (*cp == ',')
 737                                 num++;
 738                 }
 739         }
 740
 741         cmp->list = malloc(num * sizeof(char *));
 742         cmp->type = malloc(num * sizeof(int));
 743         if (!cmp->list || !cmp->type) {
 744                 fputs(_("Couldn't allocate memory for filesystem types\n"),
 745                       stderr);
 746                 exit(EXIT_ERROR);
 747         }
 748         memset(cmp->list, 0, num * sizeof(char *));
 749         memset(cmp->type, 0, num * sizeof(int));
 750         cmp->negate = 0;
 751
 752         if (!fs_type)
 753                 return;
 754
 755         list = string_copy(fs_type);
 756         num = 0;
 757         s = strtok(list, ",");
 758         while(s) {
 759                 negate = 0;
 760                 if (strncmp(s, "no", 2) == 0) {
 761                         s += 2;
 762                         negate = 1;
 763                 } else if (*s == '!') {
 764                         s++;
 765                         negate = 1;
 766                 }
 767                 if (strcmp(s, "loop") == 0)
 768                         /* loop is really short-hand for opts=loop */
 769                         goto loop_special_case;
 770                 else if (strncmp(s, "opts=", 5) == 0) {
 771                         s += 5;
 772                 loop_special_case:
 773                         cmp->type[num] = negate ? FS_TYPE_NEGOPT : FS_TYPE_OPT;
 774                 } else {
 775                         if (first_negate) {
 776                                 cmp->negate = negate;
 777                                 first_negate = 0;
 778                         }
 779                         if ((negate && !cmp->negate) ||
 780                             (!negate && cmp->negate)) {
 781                                 fputs(_(fs_type_syntax_error), stderr);
 782                                 exit(EXIT_USAGE);
 783                         }
 784                 }
 785 #if 0
 786                 printf("Adding %s to list (type %d).\n", s, cmp->type[num]);
 787 #endif
 788                 cmp->list[num++] = string_copy(s);
 789                 s = strtok(NULL, ",");
 790         }
 791         free(list);
 792 }
 793
 794 /*
 795  * This function returns true if a particular option appears in a
 796  * comma-delimited options list
 797  */
 798 static int opt_in_list(const char *opt, char *optlist)
 799 {
 800         char    *list, *s;
 801
 802         if (!optlist)
 803                 return 0;
 804         list = string_copy(optlist);
 805
 806         s = strtok(list, ",");
 807         while(s) {
 808                 if (strcmp(s, opt) == 0) {
 809                         free(list);
 810                         return 1;
 811                 }
 812                 s = strtok(NULL, ",");
 813         }
 814         free(list);
 815         return 0;
 816 }
 817
 818 /* See if the filesystem matches the criteria given by the -t option */
 819 static int fs_match(struct fs_info *fs, struct fs_type_compile *cmp)
 820 {
 821         int n, ret = 0, checked_type = 0;
 822         char *cp;
 823
 824         if (cmp->list == 0 || cmp->list[0] == 0)
 825                 return 1;
 826
 827         for (n=0; (cp = cmp->list[n]); n++) {
 828                 switch (cmp->type[n]) {
 829                 case FS_TYPE_NORMAL:
 830                         checked_type++;
 831                         if (strcmp(cp, fs->type) == 0) {
 832                                 ret = 1;
 833                         }
 834                         break;
 835                 case FS_TYPE_NEGOPT:
 836                         if (opt_in_list(cp, fs->opts))
 837                                 return 0;
 838                         break;
 839                 case FS_TYPE_OPT:
 840                         if (!opt_in_list(cp, fs->opts))
 841                                 return 0;
 842                         break;
 843                 }
 844         }
 845         if (checked_type == 0)
 846                 return 1;
 847         return (cmp->negate ? !ret : ret);
 848 }
 849
 850 /* Check if we should ignore this filesystem. */
 851 static int ignore(struct fs_info *fs)
 852 {
 853         const char **ip;
 854         int wanted = 0;
 855
 856         /*
 857          * If the pass number is 0, ignore it.
 858          */
 859         if (fs->passno == 0)
 860                 return 1;
 861
 862         /*
 863          * If this is a bind mount, ignore it.
 864          */
 865         if (opt_in_list("bind", fs->opts)) {
 866                 fprintf(stderr,
 867                         _("%s: skipping bad line in /etc/fstab: bind mount with nonzero fsck pass number\n"),
 868                         fs->mountpt);
 869                 return 1;
 870         }
 871
 872         interpret_type(fs);
 873
 874         /*
 875          * If a specific fstype is specified, and it doesn't match,
 876          * ignore it.
 877          */
 878         if (!fs_match(fs, &fs_type_compiled)) return 1;
 879
 880         /* Are we ignoring this type? */
 881         for(ip = ignored_types; *ip; ip++)
 882                 if (strcmp(fs->type, *ip) == 0) return 1;
 883
 884         /* Do we really really want to check this fs? */
 885         for(ip = really_wanted; *ip; ip++)
 886                 if (strcmp(fs->type, *ip) == 0) {
 887                         wanted = 1;
 888                         break;
 889                 }
 890
 891         /* See if the <fsck.fs> program is available. */
 892         if (find_fsck(fs->type) == NULL) {
 893                 if (wanted)
 894                         fprintf(stderr, _("fsck: cannot check %s: fsck.%s not found\n"),
 895                                 fs->device, fs->type);
 896                 return 1;
 897         }
 898
 899         /* We can and want to check this file system type. */
 900         return 0;
 901 }
 902
 903 /*
 904  * Returns TRUE if a partition on the same disk is already being
 905  * checked.
 906  */
 907 static int device_already_active(char *device)
 908 {
 909         struct fsck_instance *inst;
 910         char *base;
 911
 912         if (force_all_parallel)
 913                 return 0;
 914
 915 #ifdef BASE_MD
 916         /* Don't check a soft raid disk with any other disk */
 917         if (instance_list &&
 918             (!strncmp(instance_list->device, BASE_MD, sizeof(BASE_MD)-1) ||
 919              !strncmp(device, BASE_MD, sizeof(BASE_MD)-1)))
 920                 return 1;
 921 #endif
 922
 923         base = base_device(device);
 924         /*
 925          * If we don't know the base device, assume that the device is
 926          * already active if there are any fsck instances running.
 927          */
 928         if (!base)
 929                 return (instance_list != 0);
 930         for (inst = instance_list; inst; inst = inst->next) {
 931                 if (!inst->base_device || !strcmp(base, inst->base_device)) {
 932                         free(base);
 933                         return 1;
 934                 }
 935         }
 936         free(base);
 937         return 0;
 938 }
 939
 940 /* Check all file systems, using the /etc/fstab table. */
 941 static int check_all(NOARGS)
 942 {
 943         struct fs_info *fs = NULL;
 944         int status = EXIT_OK;
 945         int not_done_yet = 1;
 946         int passno = 1;
 947         int pass_done;
 948
 949         if (verbose)
 950                 fputs(_("Checking all file systems.\n"), stdout);
 951
 952         /*
 953          * Do an initial scan over the filesystem; mark filesystems
 954          * which should be ignored as done, and resolve any "auto"
 955          * filesystem types (done as a side-effect of calling ignore()).
 956          */
 957         for (fs = filesys_info; fs; fs = fs->next) {
 958                 if (ignore(fs))
 959                         fs->flags |= FLAG_DONE;
 960         }
 961
 962         /*
 963          * Find and check the root filesystem.
 964          */
 965         if (!parallel_root) {
 966                 for (fs = filesys_info; fs; fs = fs->next) {
 967                         if (!strcmp(fs->mountpt, "/"))
 968                                 break;
 969                 }
 970                 if (fs) {
 971                         if (!skip_root && !ignore(fs) &&
 972                             !(ignore_mounted && is_mounted(fs->device))) {
 973                                 fsck_device(fs, 1);
 974                                 status |= wait_many(FLAG_WAIT_ALL);
 975                                 if (status > EXIT_NONDESTRUCT)
 976                                         return status;
 977                         }
 978                         fs->flags |= FLAG_DONE;
 979                 }
 980         }
 981         /*
 982          * This is for the bone-headed user who enters the root
 983          * filesystem twice.  Skip root will skep all root entries.
 984          */
 985         if (skip_root)
 986                 for (fs = filesys_info; fs; fs = fs->next)
 987                         if (!strcmp(fs->mountpt, "/"))
 988                                 fs->flags |= FLAG_DONE;
 989
 990         while (not_done_yet) {
 991                 not_done_yet = 0;
 992                 pass_done = 1;
 993
 994                 for (fs = filesys_info; fs; fs = fs->next) {
 995                         if (cancel_requested)
 996                                 break;
 997                         if (fs->flags & FLAG_DONE)
 998                                 continue;
 999                         /*
1000                          * If the filesystem's pass number is higher
1001                          * than the current pass number, then we don't
1002                          * do it yet.
1003                          */
1004                         if (fs->passno > passno) {
1005                                 not_done_yet++;
1006                                 continue;
1007                         }
1008                         if (ignore_mounted && is_mounted(fs->device)) {
1009                                 fs->flags |= FLAG_DONE;
1010                                 continue;
1011                         }
1012                         /*
1013                          * If a filesystem on a particular device has
1014                          * already been spawned, then we need to defer
1015                          * this to another pass.
1016                          */
1017                         if (device_already_active(fs->device)) {
1018                                 pass_done = 0;
1019                                 continue;
1020                         }
1021                         /*
1022                          * Spawn off the fsck process
1023                          */
1024                         fsck_device(fs, serialize);
1025                         fs->flags |= FLAG_DONE;
1026
1027                         /*
1028                          * Only do one filesystem at a time, or if we
1029                          * have a limit on the number of fsck's extant
1030                          * at one time, apply that limit.
1031                          */
1032                         if (serialize ||
1033                             (max_running && (num_running >= max_running))) {
1034                                 pass_done = 0;
1035                                 break;
1036                         }
1037                 }
1038                 if (cancel_requested)
1039                         break;
1040                 if (verbose > 1)
1041                         printf(_("--waiting-- (pass %d)\n"), passno);
1042                 status |= wait_many(pass_done ? FLAG_WAIT_ALL :
1043                                     FLAG_WAIT_ATLEAST_ONE);
1044                 if (pass_done) {
1045                         if (verbose > 1)
1046                                 printf("----------------------------------\n");
1047                         passno++;
1048                 } else
1049                         not_done_yet++;
1050         }
1051         if (cancel_requested && !kill_sent) {
1052                 kill_all(SIGTERM);
1053                 kill_sent++;
1054         }
1055         status |= wait_many(FLAG_WAIT_ATLEAST_ONE);
1056         return status;
1057 }
1058
1059 static void usage(NOARGS)
1060 {
1061         fputs(_("Usage: fsck [-AMNPRTV] [ -C [ fd ] ] [-t fstype] [fs-options] [filesys ...]\n"), stderr);
1062         exit(EXIT_USAGE);
1063 }
1064
1065 static void signal_cancel(int sig FSCK_ATTR((unused)))
1066 {
1067         cancel_requested++;
1068 }
1069
1070 static void PRS(int argc, char *argv[])
1071 {
1072         int     i, j;
1073         char    *arg, *dev, *tmp = 0;
1074         char    options[128];
1075         int     opt = 0;
1076         int     opts_for_fsck = 0;
1077         struct sigaction        sa;
1078
1079         /*
1080          * Set up signal action
1081          */
1082         memset(&sa, 0, sizeof(struct sigaction));
1083         sa.sa_handler = signal_cancel;
1084         sigaction(SIGINT, &sa, 0);
1085         sigaction(SIGTERM, &sa, 0);
1086
1087         num_devices = 0;
1088         num_args = 0;
1089         instance_list = 0;
1090
1091         progname = argv[0];
1092
1093         for (i=1; i < argc; i++) {
1094                 arg = argv[i];
1095                 if (!arg)
1096                         continue;
1097                 if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) {
1098                         if (num_devices >= MAX_DEVICES) {
1099                                 fprintf(stderr, _("%s: too many devices\n"),
1100                                         progname);
1101                                 exit(EXIT_ERROR);
1102                         }
1103                         dev = fsprobe_get_devname_by_spec(arg);
1104                         if (!dev && strchr(arg, '=')) {
1105                                 /*
1106                                  * Check to see if we failed because
1107                                  * /proc/partitions isn't found.
1108                                  */
1109                                 if (access(_PATH_PROC_PARTITIONS, R_OK) < 0) {
1110                                         fprintf(stderr, _("Couldn't open %s: %s\n"),
1111                                                 _PATH_PROC_PARTITIONS, strerror(errno));
1112                                         fprintf(stderr, _("Is /proc mounted?\n"));
1113                                         exit(EXIT_ERROR);
1114                                 }
1115                                 /*
1116                                  * Check to see if this is because
1117                                  * we're not running as root
1118                                  */
1119                                 if (geteuid())
1120                                         fprintf(stderr,
1121                 _("Must be root to scan for matching filesystems: %s\n"), arg);
1122                                 else
1123                                         fprintf(stderr,
1124                 _("Couldn't find matching filesystem: %s\n"), arg);
1125                                 exit(EXIT_ERROR);
1126                         }
1127                         devices[num_devices++] = dev ? dev : string_copy(arg);
1128                         continue;
1129                 }
1130                 if (arg[0] != '-' || opts_for_fsck) {
1131                         if (num_args >= MAX_ARGS) {
1132                                 fprintf(stderr, _("%s: too many arguments\n"),
1133                                         progname);
1134                                 exit(EXIT_ERROR);
1135                         }
1136                         args[num_args++] = string_copy(arg);
1137                         continue;
1138                 }
1139                 for (j=1; arg[j]; j++) {
1140                         if (opts_for_fsck) {
1141                                 options[++opt] = arg[j];
1142                                 continue;
1143                         }
1144                         switch (arg[j]) {
1145                         case 'A':
1146                                 doall++;
1147                                 break;
1148                         case 'C':
1149                                 progress++;
1150                                 if (arg[j+1]) {
1151                                         progress_fd = string_to_int(arg+j+1);
1152                                         if (progress_fd < 0)
1153                                                 progress_fd = 0;
1154                                         else
1155                                                 goto next_arg;
1156                                 } else if ((i+1) < argc &&
1157                                            !strncmp(argv[i+1], "-", 1) == 0) {
1158                                         progress_fd = string_to_int(argv[i]);
1159                                         if (progress_fd < 0)
1160                                                 progress_fd = 0;
1161                                         else {
1162                                                 goto next_arg;
1163                                                 i++;
1164                                         }
1165                                 }
1166                                 break;
1167                         case 'V':
1168                                 verbose++;
1169                                 break;
1170                         case 'N':
1171                                 noexecute++;
1172                                 break;
1173                         case 'R':
1174                                 skip_root++;
1175                                 break;
1176                         case 'T':
1177                                 notitle++;
1178                                 break;
1179                         case 'M':
1180                                 ignore_mounted++;
1181                                 break;
1182                         case 'P':
1183                                 parallel_root++;
1184                                 break;
1185                         case 's':
1186                                 serialize++;
1187                                 break;
1188                         case 't':
1189                                 tmp = 0;
1190                                 if (fstype)
1191                                         usage();
1192                                 if (arg[j+1])
1193                                         tmp = arg+j+1;
1194                                 else if ((i+1) < argc)
1195                                         tmp = argv[++i];
1196                                 else
1197                                         usage();
1198                                 fstype = string_copy(tmp);
1199                                 compile_fs_type(fstype, &fs_type_compiled);
1200                                 goto next_arg;
1201                         case '-':
1202                                 opts_for_fsck++;
1203                                 break;
1204                         case '?':
1205                                 usage();
1206                                 break;
1207                         default:
1208                                 options[++opt] = arg[j];
1209                                 break;
1210                         }
1211                 }
1212         next_arg:
1213                 if (opt) {
1214                         options[0] = '-';
1215                         options[++opt] = '\0';
1216                         if (num_args >= MAX_ARGS) {
1217                                 fprintf(stderr,
1218                                         _("%s: too many arguments\n"),
1219                                         progname);
1220                                 exit(EXIT_ERROR);
1221                         }
1222                         args[num_args++] = string_copy(options);
1223                         opt = 0;
1224                 }
1225         }
1226         if (getenv("FSCK_FORCE_ALL_PARALLEL"))
1227                 force_all_parallel++;
1228         if ((tmp = getenv("FSCK_MAX_INST")))
1229             max_running = atoi(tmp);
1230 }
1231
1232 int main(int argc, char *argv[])
1233 {
1234         int i, status = 0;
1235         int interactive = 0;
1236         char *oldpath = getenv("PATH");
1237         const char *fstab;
1238         struct fs_info *fs;
1239
1240         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
1241         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
1242
1243         setlocale(LC_MESSAGES, "");
1244         setlocale(LC_CTYPE, "");
1245         bindtextdomain(PACKAGE, LOCALEDIR);
1246         textdomain(PACKAGE);
1247
1248         fsprobe_init();
1249         PRS(argc, argv);
1250
1251         if (!notitle)
1252                 printf(_("fsck from %s\n"), PACKAGE_STRING);
1253
1254         fstab = getenv("FSTAB_FILE");
1255         if (!fstab)
1256                 fstab = _PATH_MNTTAB;
1257         load_fs_info(fstab);
1258
1259         /* Update our search path to include uncommon directories. */
1260         if (oldpath) {
1261                 fsck_path = malloc (strlen (fsck_prefix_path) + 1 +
1262                                     strlen (oldpath) + 1);
1263                 if (!fsck_path) {
1264                         fprintf(stderr, _("%s: Unable to allocate memory for fsck_path\n"), progname);
1265                         exit(EXIT_ERROR);
1266                 }
1267                 strcpy (fsck_path, fsck_prefix_path);
1268                 strcat (fsck_path, ":");
1269                 strcat (fsck_path, oldpath);
1270         } else {
1271                 fsck_path = string_copy(fsck_prefix_path);
1272         }
1273
1274         if ((num_devices == 1) || (serialize))
1275                 interactive = 1;
1276
1277         /* If -A was specified ("check all"), do that! */
1278         if (doall)
1279                 return check_all();
1280
1281         if (num_devices == 0) {
1282                 serialize++;
1283                 interactive++;
1284                 return check_all();
1285         }
1286         for (i = 0 ; i < num_devices; i++) {
1287                 if (cancel_requested) {
1288                         if (!kill_sent) {
1289                                 kill_all(SIGTERM);
1290                                 kill_sent++;
1291                         }
1292                         break;
1293                 }
1294                 fs = lookup(devices[i]);
1295                 if (!fs) {
1296                         fs = create_fs_device(devices[i], 0, "auto",
1297                                               0, -1, -1);
1298                         if (!fs)
1299                                 continue;
1300                 }
1301                 if (ignore_mounted && is_mounted(fs->device))
1302                         continue;
1303                 fsck_device(fs, interactive);
1304                 if (serialize ||
1305                     (max_running && (num_running >= max_running))) {
1306                         struct fsck_instance *inst;
1307
1308                         inst = wait_one(0);
1309                         if (inst) {
1310                                 status |= inst->exit_status;
1311                                 free_instance(inst);
1312                         }
1313                         if (verbose > 1)
1314                                 printf("----------------------------------\n");
1315                 }
1316         }
1317         status |= wait_many(FLAG_WAIT_ALL);
1318         free(fsck_path);
1319         fsprobe_exit();
1320         return status;
1321 }
1322