sbin/fsck_ext2fs/main.c

   1 /*      $NetBSD: main.c,v 1.35 2010/01/06 18:12:37 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 1.35 2010/01/06 18:12:37 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         sync();
 104         skipclean = 1;
 105         while ((ch = getopt(argc, argv, "b:dfm:npPqUy")) != -1) {
 106                 switch (ch) {
 107                 case 'b':
 108                         skipclean = 0;
 109                         bflag = argtoi('b', "number", optarg, 10);
 110                         printf("Alternate super block location: %d\n", bflag);
 111                         break;
 112
 113                 case 'd':
 114                         debug++;
 115                         break;
 116
 117                 case 'f':
 118                         skipclean = 0;
 119                         break;
 120
 121                 case 'm':
 122                         lfmode = argtoi('m', "mode", optarg, 8);
 123                         if (lfmode &~ 07777)
 124                                 errexit("bad mode to -m: %o", lfmode);
 125                         printf("** lost+found creation mode %o\n", lfmode);
 126                         break;
 127
 128                 case 'n':
 129                         nflag++;
 130                         yflag = 0;
 131                         break;
 132
 133                 case 'p':
 134                         preen++;
 135                         break;
 136
 137                 case 'P':
 138                         /* Progress meter not implemented. */
 139                         break;
 140
 141                 case 'q':               /* Quiet not implemented */
 142                         break;
 143
 144 #ifndef SMALL
 145                 case 'U':
 146                         Uflag++;
 147                         break;
 148 #endif
 149
 150                 case 'y':
 151                         yflag++;
 152                         nflag = 0;
 153                         break;
 154
 155                 default:
 156                         usage();
 157                 }
 158         }
 159
 160         argc -= optind;
 161         argv += optind;
 162
 163         if (!argc)
 164                 usage();
 165
 166         if (signal(SIGINT, SIG_IGN) != SIG_IGN)
 167                 (void)signal(SIGINT, catch);
 168         if (preen)
 169                 (void)signal(SIGQUIT, catchquit);
 170
 171         while (argc-- > 0) {
 172                 int nret = checkfilesys(blockcheck(*argv++), 0, 0L, 0);
 173                 if (ret < nret)
 174                         ret = nret;
 175         }
 176
 177         return returntosingle ? FSCK_EXIT_UNRESOLVED : ret;
 178 }
 179
 180 static int
 181 argtoi(int flag, const char *req, const char *str, int base)
 182 {
 183         char *cp;
 184         int ret;
 185
 186         ret = (int)strtol(str, &cp, base);
 187         if (cp == str || *cp)
 188                 errexit("-%c flag requires a %s", flag, req);
 189         return (ret);
 190 }
 191
 192 /*
 193  * Check the specified filesystem.
 194  */
 195 /* ARGSUSED */
 196 static int
 197 checkfilesys(const char *filesys, char *mntpt, long auxdata, int child)
 198 {
 199         daddr_t n_bfree;
 200         struct dups *dp;
 201         struct zlncnt *zlnp;
 202         int i;
 203
 204         if (preen && child)
 205                 (void)signal(SIGQUIT, voidquit);
 206         setcdevname(filesys, preen);
 207         if (debug && preen)
 208                 pwarn("starting\n");
 209         switch (setup(filesys)) {
 210         case 0:
 211                 if (preen)
 212                         pfatal("CAN'T CHECK FILE SYSTEM.");
 213         case -1:
 214                 return FSCK_EXIT_OK;
 215         }
 216         /*
 217          * 1: scan inodes tallying blocks used
 218          */
 219         if (preen == 0) {
 220                 if (sblock.e2fs.e2fs_rev > E2FS_REV0) {
 221                         printf("** Last Mounted on %s\n",
 222                             sblock.e2fs.e2fs_fsmnt);
 223                 }
 224                 if (hotroot())
 225                         printf("** Root file system\n");
 226                 printf("** Phase 1 - Check Blocks and Sizes\n");
 227         }
 228         pass1();
 229
 230         /*
 231          * 1b: locate first references to duplicates, if any
 232          */
 233         if (duplist) {
 234                 if (preen)
 235                         pfatal("INTERNAL ERROR: dups with -p");
 236                 printf("** Phase 1b - Rescan For More DUPS\n");
 237                 pass1b();
 238         }
 239
 240         /*
 241          * 2: traverse directories from root to mark all connected directories
 242          */
 243         if (preen == 0)
 244                 printf("** Phase 2 - Check Pathnames\n");
 245         pass2();
 246
 247         /*
 248          * 3: scan inodes looking for disconnected directories
 249          */
 250         if (preen == 0)
 251                 printf("** Phase 3 - Check Connectivity\n");
 252         pass3();
 253
 254         /*
 255          * 4: scan inodes looking for disconnected files; check reference counts
 256          */
 257         if (preen == 0)
 258                 printf("** Phase 4 - Check Reference Counts\n");
 259         pass4();
 260
 261         /*
 262          * 5: check and repair resource counts in cylinder groups
 263          */
 264         if (preen == 0)
 265                 printf("** Phase 5 - Check Cyl groups\n");
 266         pass5();
 267
 268         /*
 269          * print out summary statistics
 270          */
 271         n_bfree = sblock.e2fs.e2fs_fbcount;
 272
 273         pwarn("%lld files, %lld used, %lld free\n",
 274             (long long)n_files, (long long)n_blks, (long long)n_bfree);
 275         if (debug &&
 276                 /* 9 reserved and unused inodes in FS */
 277             (n_files -= maxino - 9 - sblock.e2fs.e2fs_ficount))
 278                 printf("%lld files missing\n", (long long)n_files);
 279         if (debug) {
 280                 for (i = 0; i < sblock.e2fs_ncg; i++)
 281                         n_blks +=  cgoverhead(i);
 282                 n_blks += sblock.e2fs.e2fs_first_dblock;
 283                 if (n_blks -= maxfsblock - n_bfree)
 284                         printf("%lld blocks missing\n", (long long)n_blks);
 285                 if (duplist != NULL) {
 286                         printf("The following duplicate blocks remain:");
 287                         for (dp = duplist; dp; dp = dp->next)
 288                                 printf(" %lld,", (long long)dp->dup);
 289                         printf("\n");
 290                 }
 291                 if (zlnhead != NULL) {
 292                         printf("The following zero link count inodes remain:");
 293                         for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
 294                                 printf(" %llu,",
 295                                     (unsigned long long)zlnp->zlncnt);
 296                         printf("\n");
 297                 }
 298         }
 299         zlnhead = (struct zlncnt *)0;
 300         duplist = (struct dups *)0;
 301         muldup = (struct dups *)0;
 302         inocleanup();
 303         if (fsmodified) {
 304                 time_t t;
 305                 (void)time(&t);
 306                 sblock.e2fs.e2fs_wtime = t;
 307                 sblock.e2fs.e2fs_lastfsck = t;
 308                 sbdirty();
 309         }
 310         ckfini(1);
 311         free(blockmap);
 312         free(statemap);
 313         free((char *)lncntp);
 314         if (!fsmodified)
 315                 return FSCK_EXIT_OK;
 316         if (!preen)
 317                 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
 318         if (rerun)
 319                 printf("\n***** PLEASE RERUN FSCK *****\n");
 320         if (hotroot()) {
 321                 struct statvfs stfs_buf;
 322                 /*
 323                  * We modified the root.  Do a mount update on
 324                  * it, unless it is read-write, so we can continue.
 325                  */
 326                 if (statvfs("/", &stfs_buf) == 0) {
 327                         long flags = stfs_buf.f_flag;
 328                         struct ufs_args args;
 329
 330                         if (flags & MNT_RDONLY) {
 331                                 args.fspec = 0;
 332                                 flags |= MNT_UPDATE | MNT_RELOAD;
 333                                 if (mount(MOUNT_EXT2FS, "/", flags,
 334                                     &args, sizeof args) == 0)
 335                                         return FSCK_EXIT_OK;
 336                         }
 337                 }
 338                 if (!preen)
 339                         printf("\n***** REBOOT NOW *****\n");
 340                 sync();
 341                 return FSCK_EXIT_ROOT_CHANGED;
 342         }
 343         return FSCK_EXIT_OK;
 344 }
 345
 346 static void
 347 usage(void)
 348 {
 349
 350         (void) fprintf(stderr,
 351             "usage: %s [-dfnpUy] [-b block] [-c level] [-m mode] filesystem ...\n",
 352             getprogname());
 353         exit(FSCK_EXIT_USAGE);
 354 }
 355