sbin/fsck_ext2fs/main.c

   1 /*      $NetBSD: main.c,v 1.37 2011/06/09 19:57:51 christos Exp $       */
   2
   3 /*
   4  * Copyright (c) 1980, 1986, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * Copyright (c) 1997 Manuel Bouyer.
  34  *
  35  * Redistribution and use in source and binary forms, with or without
  36  * modification, are permitted provided that the following conditions
  37  * are met:
  38  * 1. Redistributions of source code must retain the above copyright
  39  *    notice, this list of conditions and the following disclaimer.
  40  * 2. Redistributions in binary form must reproduce the above copyright
  41  *    notice, this list of conditions and the following disclaimer in the
  42  *    documentation and/or other materials provided with the distribution.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  45  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  46  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  47  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  48  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  49  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  50  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  51  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  52  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  53  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  54  */
  55
  56 #include <sys/cdefs.h>
  57 #ifndef lint
  58 __COPYRIGHT("@(#) Copyright (c) 1980, 1986, 1993\
  59  The Regents of the University of California.  All rights reserved.");
  60 #endif /* not lint */
  61
  62 #ifndef lint
  63 #if 0
  64 static char sccsid[] = "@(#)main.c      8.2 (Berkeley) 1/23/94";
  65 #else
  66 __RCSID("$NetBSD: main.c,v 1.37 2011/06/09 19:57:51 christos Exp $");
  67 #endif
  68 #endif /* not lint */
  69
  70 #include <sys/param.h>
  71 #include <sys/time.h>
  72 #include <sys/mount.h>
  73 #include <ufs/ufs/ufsmount.h>
  74 #include <ufs/ext2fs/ext2fs_dinode.h>
  75 #include <ufs/ext2fs/ext2fs.h>
  76 #include <fstab.h>
  77 #include <stdlib.h>
  78 #include <string.h>
  79 #include <ctype.h>
  80 #include <stdio.h>
  81 #include <time.h>
  82 #include <unistd.h>
  83 #include <signal.h>
  84
  85 #include "fsck.h"
  86 #include "extern.h"
  87 #include "fsutil.h"
  88 #include "exitvalues.h"
  89
  90 volatile sig_atomic_t   returntosingle = 0;
  91
  92
  93 static int      argtoi(int, const char *, const char *, int);
  94 static int      checkfilesys(const char *, char *, long, int);
  95 static void     usage(void) __dead;
  96
  97 int
  98 main(int argc, char *argv[])
  99 {
 100         int ch;
 101         int ret = FSCK_EXIT_OK;
 102
 103         ckfinish = ckfini;
 104         sync();
 105         skipclean = 1;
 106         while ((ch = getopt(argc, argv, "b:dfm:npPqUy")) != -1) {
 107                 switch (ch) {
 108                 case 'b':
 109                         skipclean = 0;
 110                         bflag = argtoi('b', "number", optarg, 10);
 111                         printf("Alternate super block location: %d\n", bflag);
 112                         break;
 113
 114                 case 'd':
 115                         debug++;
 116                         break;
 117
 118                 case 'f':
 119                         skipclean = 0;
 120                         break;
 121
 122                 case 'm':
 123                         lfmode = argtoi('m', "mode", optarg, 8);
 124                         if (lfmode &~ 07777)
 125                                 errexit("bad mode to -m: %o", lfmode);
 126                         printf("** lost+found creation mode %o\n", lfmode);
 127                         break;
 128
 129                 case 'n':
 130                         nflag++;
 131                         yflag = 0;
 132                         break;
 133
 134                 case 'p':
 135                         preen++;
 136                         break;
 137
 138                 case 'P':
 139                         /* Progress meter not implemented. */
 140                         break;
 141
 142                 case 'q':               /* Quiet not implemented */
 143                         break;
 144
 145 #ifndef SMALL
 146                 case 'U':
 147                         Uflag++;
 148                         break;
 149 #endif
 150
 151                 case 'y':
 152                         yflag++;
 153                         nflag = 0;
 154                         break;
 155
 156                 default:
 157                         usage();
 158                 }
 159         }
 160
 161         argc -= optind;
 162         argv += optind;
 163
 164         if (!argc)
 165                 usage();
 166
 167         if (signal(SIGINT, SIG_IGN) != SIG_IGN)
 168                 (void)signal(SIGINT, catch);
 169         if (preen)
 170                 (void)signal(SIGQUIT, catchquit);
 171
 172         while (argc-- > 0) {
 173                 int nret = checkfilesys(blockcheck(*argv++), 0, 0L, 0);
 174                 if (ret < nret)
 175                         ret = nret;
 176         }
 177
 178         return returntosingle ? FSCK_EXIT_UNRESOLVED : ret;
 179 }
 180
 181 static int
 182 argtoi(int flag, const char *req, const char *str, int base)
 183 {
 184         char *cp;
 185         int ret;
 186
 187         ret = (int)strtol(str, &cp, base);
 188         if (cp == str || *cp)
 189                 errexit("-%c flag requires a %s", flag, req);
 190         return (ret);
 191 }
 192
 193 /*
 194  * Check the specified filesystem.
 195  */
 196 /* ARGSUSED */
 197 static int
 198 checkfilesys(const char *filesys, char *mntpt, long auxdata, int child)
 199 {
 200         daddr_t n_bfree;
 201         struct dups *dp;
 202         struct zlncnt *zlnp;
 203         int i;
 204
 205         if (preen && child)
 206                 (void)signal(SIGQUIT, voidquit);
 207         setcdevname(filesys, preen);
 208         if (debug && preen)
 209                 pwarn("starting\n");
 210         switch (setup(filesys)) {
 211         case 0:
 212                 if (preen)
 213                         pfatal("CAN'T CHECK FILE SYSTEM.");
 214         case -1:
 215                 return FSCK_EXIT_OK;
 216         }
 217         /*
 218          * 1: scan inodes tallying blocks used
 219          */
 220         if (preen == 0) {
 221                 if (sblock.e2fs.e2fs_rev > E2FS_REV0) {
 222                         printf("** Last Mounted on %s\n",
 223                             sblock.e2fs.e2fs_fsmnt);
 224                 }
 225                 if (hotroot())
 226                         printf("** Root file system\n");
 227                 printf("** Phase 1 - Check Blocks and Sizes\n");
 228         }
 229         pass1();
 230
 231         /*
 232          * 1b: locate first references to duplicates, if any
 233          */
 234         if (duplist) {
 235                 if (preen)
 236                         pfatal("INTERNAL ERROR: dups with -p");
 237                 printf("** Phase 1b - Rescan For More DUPS\n");
 238                 pass1b();
 239         }
 240
 241         /*
 242          * 2: traverse directories from root to mark all connected directories
 243          */
 244         if (preen == 0)
 245                 printf("** Phase 2 - Check Pathnames\n");
 246         pass2();
 247
 248         /*
 249          * 3: scan inodes looking for disconnected directories
 250          */
 251         if (preen == 0)
 252                 printf("** Phase 3 - Check Connectivity\n");
 253         pass3();
 254
 255         /*
 256          * 4: scan inodes looking for disconnected files; check reference counts
 257          */
 258         if (preen == 0)
 259                 printf("** Phase 4 - Check Reference Counts\n");
 260         pass4();
 261
 262         /*
 263          * 5: check and repair resource counts in cylinder groups
 264          */
 265         if (preen == 0)
 266                 printf("** Phase 5 - Check Cyl groups\n");
 267         pass5();
 268
 269         /*
 270          * print out summary statistics
 271          */
 272         n_bfree = sblock.e2fs.e2fs_fbcount;
 273
 274         pwarn("%lld files, %lld used, %lld free\n",
 275             (long long)n_files, (long long)n_blks, (long long)n_bfree);
 276         if (debug &&
 277                 /* 9 reserved and unused inodes in FS */
 278             (n_files -= maxino - 9 - sblock.e2fs.e2fs_ficount))
 279                 printf("%lld files missing\n", (long long)n_files);
 280         if (debug) {
 281                 for (i = 0; i < sblock.e2fs_ncg; i++)
 282                         n_blks +=  cgoverhead(i);
 283                 n_blks += sblock.e2fs.e2fs_first_dblock;
 284                 if (n_blks -= maxfsblock - n_bfree)
 285                         printf("%lld blocks missing\n", (long long)n_blks);
 286                 if (duplist != NULL) {
 287                         printf("The following duplicate blocks remain:");
 288                         for (dp = duplist; dp; dp = dp->next)
 289                                 printf(" %lld,", (long long)dp->dup);
 290                         printf("\n");
 291                 }
 292                 if (zlnhead != NULL) {
 293                         printf("The following zero link count inodes remain:");
 294                         for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
 295                                 printf(" %llu,",
 296                                     (unsigned long long)zlnp->zlncnt);
 297                         printf("\n");
 298                 }
 299         }
 300         zlnhead = (struct zlncnt *)0;
 301         duplist = (struct dups *)0;
 302         muldup = (struct dups *)0;
 303         inocleanup();
 304         if (fsmodified) {
 305                 time_t t;
 306                 (void)time(&t);
 307                 sblock.e2fs.e2fs_wtime = t;
 308                 sblock.e2fs.e2fs_lastfsck = t;
 309                 sbdirty();
 310         }
 311         ckfini(1);
 312         free(blockmap);
 313         free(statemap);
 314         free((char *)lncntp);
 315         if (!fsmodified)
 316                 return FSCK_EXIT_OK;
 317         if (!preen)
 318                 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
 319         if (rerun)
 320                 printf("\n***** PLEASE RERUN FSCK *****\n");
 321 #if !defined(__minix)
 322         if (hotroot()) {
 323                 struct statvfs stfs_buf;
 324                 /*
 325                  * We modified the root.  Do a mount update on
 326                  * it, unless it is read-write, so we can continue.
 327                  */
 328                 if (statvfs("/", &stfs_buf) == 0) {
 329                         long flags = stfs_buf.f_flag;
 330                         struct ufs_args args;
 331
 332                         if (flags & MNT_RDONLY) {
 333                                 args.fspec = 0;
 334                                 flags |= MNT_UPDATE | MNT_RELOAD;
 335                                 if (mount(MOUNT_EXT2FS, "/", flags,
 336                                     &args, sizeof args) == 0)
 337                                         return FSCK_EXIT_OK;
 338                         }
 339                 }
 340                 if (!preen)
 341                         printf("\n***** REBOOT NOW *****\n");
 342                 sync();
 343                 return FSCK_EXIT_ROOT_CHANGED;
 344         }
 345 #endif /* !defined(__minix) */
 346         return FSCK_EXIT_OK;
 347 }
 348
 349 static void
 350 usage(void)
 351 {
 352
 353         (void) fprintf(stderr,
 354             "usage: %s [-dfnpUy] [-b block] [-c level] [-m mode] filesystem ...\n",
 355             getprogname());
 356         exit(FSCK_EXIT_USAGE);
 357 }
 358