sbin/fsck_ffs/main.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   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 #if 0
  33 #ifndef lint
  34 static const char copyright[] =
  35 "@(#) Copyright (c) 1980, 1986, 1993\n\
  36         The Regents of the University of California.  All rights reserved.\n";
  37 #endif /* not lint */
  38
  39 #ifndef lint
  40 static char sccsid[] = "@(#)main.c      8.6 (Berkeley) 5/14/95";
  41 #endif /* not lint */
  42 #endif
  43 #include <sys/cdefs.h>
  44 __FBSDID("$FreeBSD$");
  45
  46 #define IN_RTLD                 /* So we pickup the P_OSREL defines */
  47 #include <sys/param.h>
  48 #include <sys/file.h>
  49 #include <sys/mount.h>
  50 #include <sys/resource.h>
  51 #include <sys/stat.h>
  52 #include <sys/sysctl.h>
  53 #include <sys/uio.h>
  54 #include <sys/disklabel.h>
  55
  56 #include <ufs/ufs/dinode.h>
  57 #include <ufs/ffs/fs.h>
  58
  59 #include <err.h>
  60 #include <errno.h>
  61 #include <fstab.h>
  62 #include <grp.h>
  63 #include <inttypes.h>
  64 #include <libufs.h>
  65 #include <mntopts.h>
  66 #include <paths.h>
  67 #include <stdint.h>
  68 #include <string.h>
  69 #include <time.h>
  70
  71 #include "fsck.h"
  72
  73 int     restarts;
  74
  75 static void usage(void) __dead2;
  76 static intmax_t argtoimax(int flag, const char *req, const char *str, int base);
  77 static int checkfilesys(char *filesys);
  78 static int chkdoreload(struct statfs *mntp);
  79 static struct statfs *getmntpt(const char *);
  80
  81 int
  82 main(int argc, char *argv[])
  83 {
  84         int ch;
  85         struct rlimit rlimit;
  86         struct itimerval itimerval;
  87         int fsret;
  88         int ret = 0;
  89
  90         sync();
  91         skipclean = 1;
  92         inoopt = 0;
  93         while ((ch = getopt(argc, argv, "b:Bc:CdEfFm:npRrSyZz")) != -1) {
  94                 switch (ch) {
  95                 case 'b':
  96                         skipclean = 0;
  97                         bflag = argtoimax('b', "number", optarg, 10);
  98                         printf("Alternate super block location: %jd\n", bflag);
  99                         break;
 100
 101                 case 'B':
 102                         bkgrdflag = 1;
 103                         break;
 104
 105                 case 'c':
 106                         skipclean = 0;
 107                         cvtlevel = argtoimax('c', "conversion level", optarg,
 108                             10);
 109                         if (cvtlevel < 3)
 110                                 errx(EEXIT, "cannot do level %d conversion",
 111                                     cvtlevel);
 112                         break;
 113
 114                 case 'd':
 115                         debug++;
 116                         break;
 117
 118                 case 'E':
 119                         Eflag++;
 120                         break;
 121
 122                 case 'f':
 123                         skipclean = 0;
 124                         break;
 125
 126                 case 'F':
 127                         bkgrdcheck = 1;
 128                         break;
 129
 130                 case 'm':
 131                         lfmode = argtoimax('m', "mode", optarg, 8);
 132                         if (lfmode &~ 07777)
 133                                 errx(EEXIT, "bad mode to -m: %o", lfmode);
 134                         printf("** lost+found creation mode %o\n", lfmode);
 135                         break;
 136
 137                 case 'n':
 138                         nflag++;
 139                         yflag = 0;
 140                         break;
 141
 142                 case 'p':
 143                         preen++;
 144                         /*FALLTHROUGH*/
 145
 146                 case 'C':
 147                         ckclean++;
 148                         break;
 149
 150                 case 'R':
 151                         wantrestart = 1;
 152                         break;
 153                 case 'r':
 154                         inoopt++;
 155                         break;
 156
 157                 case 'S':
 158                         surrender = 1;
 159                         break;
 160
 161                 case 'y':
 162                         yflag++;
 163                         nflag = 0;
 164                         break;
 165
 166                 case 'Z':
 167                         Zflag++;
 168                         break;
 169
 170                 case 'z':
 171                         zflag++;
 172                         break;
 173
 174                 default:
 175                         usage();
 176                 }
 177         }
 178         argc -= optind;
 179         argv += optind;
 180
 181         if (!argc)
 182                 usage();
 183
 184         if (signal(SIGINT, SIG_IGN) != SIG_IGN)
 185                 (void)signal(SIGINT, catch);
 186         if (ckclean)
 187                 (void)signal(SIGQUIT, catchquit);
 188         signal(SIGINFO, infohandler);
 189         if (bkgrdflag) {
 190                 signal(SIGALRM, alarmhandler);
 191                 itimerval.it_interval.tv_sec = 5;
 192                 itimerval.it_interval.tv_usec = 0;
 193                 itimerval.it_value.tv_sec = 5;
 194                 itimerval.it_value.tv_usec = 0;
 195                 setitimer(ITIMER_REAL, &itimerval, NULL);
 196         }
 197         /*
 198          * Push up our allowed memory limit so we can cope
 199          * with huge file systems.
 200          */
 201         if (getrlimit(RLIMIT_DATA, &rlimit) == 0) {
 202                 rlimit.rlim_cur = rlimit.rlim_max;
 203                 (void)setrlimit(RLIMIT_DATA, &rlimit);
 204         }
 205         while (argc > 0) {
 206                 if ((fsret = checkfilesys(*argv)) == ERESTART)
 207                         continue;
 208                 ret |= fsret;
 209                 argc--;
 210                 argv++;
 211         }
 212
 213         if (returntosingle)
 214                 ret = 2;
 215         exit(ret);
 216 }
 217
 218 static intmax_t
 219 argtoimax(int flag, const char *req, const char *str, int base)
 220 {
 221         char *cp;
 222         intmax_t ret;
 223
 224         ret = strtoimax(str, &cp, base);
 225         if (cp == str || *cp)
 226                 errx(EEXIT, "-%c flag requires a %s", flag, req);
 227         return (ret);
 228 }
 229
 230 /*
 231  * Check the specified file system.
 232  */
 233 /* ARGSUSED */
 234 static int
 235 checkfilesys(char *filesys)
 236 {
 237         ufs2_daddr_t n_ffree, n_bfree;
 238         struct dups *dp;
 239         struct statfs *mntp;
 240         struct stat snapdir;
 241         struct group *grp;
 242         struct iovec *iov;
 243         char errmsg[255];
 244         int ofsmodified;
 245         int iovlen;
 246         int cylno;
 247         intmax_t blks, files;
 248         size_t size;
 249
 250         iov = NULL;
 251         iovlen = 0;
 252         errmsg[0] = '\0';
 253         fsutilinit();
 254         fsckinit();
 255
 256         cdevname = filesys;
 257         if (debug && ckclean)
 258                 pwarn("starting\n");
 259         /*
 260          * Make best effort to get the disk name. Check first to see
 261          * if it is listed among the mounted file systems. Failing that
 262          * check to see if it is listed in /etc/fstab.
 263          */
 264         mntp = getmntpt(filesys);
 265         if (mntp != NULL)
 266                 filesys = mntp->f_mntfromname;
 267         else
 268                 filesys = blockcheck(filesys);
 269         /*
 270          * If -F flag specified, check to see whether a background check
 271          * is possible and needed. If possible and needed, exit with
 272          * status zero. Otherwise exit with status non-zero. A non-zero
 273          * exit status will cause a foreground check to be run.
 274          */
 275         sblock_init();
 276         if (bkgrdcheck) {
 277                 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0)
 278                         exit(3);        /* Cannot read superblock */
 279                 close(fsreadfd);
 280                 /* Earlier background failed or journaled */
 281                 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ))
 282                         exit(4);
 283                 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0)
 284                         exit(5);        /* Not running soft updates */
 285                 size = MIBSIZE;
 286                 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0)
 287                         exit(6);        /* Lacks kernel support */
 288                 if ((mntp == NULL && sblock.fs_clean == 1) ||
 289                     (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0))
 290                         exit(7);        /* Filesystem clean, report it now */
 291                 exit(0);
 292         }
 293         if (ckclean && skipclean) {
 294                 /*
 295                  * If file system is gjournaled, check it here.
 296                  */
 297                 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0)
 298                         exit(3);        /* Cannot read superblock */
 299                 close(fsreadfd);
 300                 if ((sblock.fs_flags & FS_GJOURNAL) != 0) {
 301                         //printf("GJournaled file system detected on %s.\n",
 302                         //    filesys);
 303                         if (sblock.fs_clean == 1) {
 304                                 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
 305                                 exit(0);
 306                         }
 307                         if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) {
 308                                 gjournal_check(filesys);
 309                                 if (chkdoreload(mntp) == 0)
 310                                         exit(0);
 311                                 exit(4);
 312                         } else {
 313                                 pfatal(
 314                             "UNEXPECTED INCONSISTENCY, CANNOT RUN FAST FSCK\n");
 315                         }
 316                 }
 317         }
 318         /*
 319          * If we are to do a background check:
 320          *      Get the mount point information of the file system
 321          *      create snapshot file
 322          *      return created snapshot file
 323          *      if not found, clear bkgrdflag and proceed with normal fsck
 324          */
 325         if (bkgrdflag) {
 326                 if (mntp == NULL) {
 327                         bkgrdflag = 0;
 328                         pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n");
 329                 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) {
 330                         bkgrdflag = 0;
 331                         pfatal(
 332                           "NOT USING SOFT UPDATES, CANNOT RUN IN BACKGROUND\n");
 333                 } else if ((mntp->f_flags & MNT_RDONLY) != 0) {
 334                         bkgrdflag = 0;
 335                         pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n");
 336                 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) {
 337                         if (readsb(0) != 0) {
 338                                 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) {
 339                                         bkgrdflag = 0;
 340                                         pfatal(
 341                         "UNEXPECTED INCONSISTENCY, CANNOT RUN IN BACKGROUND\n");
 342                                 }
 343                                 if ((sblock.fs_flags & FS_UNCLEAN) == 0 &&
 344                                     skipclean && ckclean) {
 345                                         /*
 346                                          * file system is clean;
 347                                          * skip snapshot and report it clean
 348                                          */
 349                                         pwarn(
 350                                         "FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
 351                                         goto clean;
 352                                 }
 353                         }
 354                         close(fsreadfd);
 355                 }
 356                 if (bkgrdflag) {
 357                         snprintf(snapname, sizeof snapname, "%s/.snap",
 358                             mntp->f_mntonname);
 359                         if (stat(snapname, &snapdir) < 0) {
 360                                 if (errno != ENOENT) {
 361                                         bkgrdflag = 0;
 362                                         pfatal(
 363         "CANNOT FIND SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n",
 364                                             snapname, strerror(errno));
 365                                 } else if ((grp = getgrnam("operator")) == NULL ||
 366                                            mkdir(snapname, 0770) < 0 ||
 367                                            chown(snapname, -1, grp->gr_gid) < 0 ||
 368                                            chmod(snapname, 0770) < 0) {
 369                                         bkgrdflag = 0;
 370                                         pfatal(
 371         "CANNOT CREATE SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n",
 372                                             snapname, strerror(errno));
 373                                 }
 374                         } else if (!S_ISDIR(snapdir.st_mode)) {
 375                                 bkgrdflag = 0;
 376                                 pfatal(
 377                         "%s IS NOT A DIRECTORY, CANNOT RUN IN BACKGROUND\n",
 378                                     snapname);
 379                         }
 380                 }
 381                 if (bkgrdflag) {
 382                         snprintf(snapname, sizeof snapname,
 383                             "%s/.snap/fsck_snapshot", mntp->f_mntonname);
 384                         build_iovec(&iov, &iovlen, "fstype", "ffs", 4);
 385                         build_iovec(&iov, &iovlen, "from", snapname,
 386                             (size_t)-1);
 387                         build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname,
 388                             (size_t)-1);
 389                         build_iovec(&iov, &iovlen, "errmsg", errmsg,
 390                             sizeof(errmsg));
 391                         build_iovec(&iov, &iovlen, "update", NULL, 0);
 392                         build_iovec(&iov, &iovlen, "snapshot", NULL, 0);
 393
 394                         while (nmount(iov, iovlen, mntp->f_flags) < 0) {
 395                                 if (errno == EEXIST && unlink(snapname) == 0)
 396                                         continue;
 397                                 bkgrdflag = 0;
 398                                 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n",
 399                                     snapname, strerror(errno), errmsg);
 400                                 break;
 401                         }
 402                         if (bkgrdflag != 0)
 403                                 filesys = snapname;
 404                 }
 405         }
 406
 407         switch (setup(filesys)) {
 408         case 0:
 409                 if (preen)
 410                         pfatal("CAN'T CHECK FILE SYSTEM.");
 411                 return (EEXIT);
 412         case -1:
 413         clean:
 414                 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree +
 415                     sblock.fs_frag * sblock.fs_cstotal.cs_nbfree));
 416                 printf("(%jd frags, %jd blocks, %.1f%% fragmentation)\n",
 417                     (intmax_t)sblock.fs_cstotal.cs_nffree,
 418                     (intmax_t)sblock.fs_cstotal.cs_nbfree,
 419                     sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize);
 420                 return (0);
 421         }
 422         /*
 423          * Determine if we can and should do journal recovery.
 424          */
 425         if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) {
 426                 if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK && skipclean) {
 427                         if (suj_check(filesys) == 0) {
 428                                 printf("\n***** FILE SYSTEM MARKED CLEAN *****\n");
 429                                 if (chkdoreload(mntp) == 0)
 430                                         exit(0);
 431                                 exit(4);
 432                         }
 433                         printf("** Skipping journal, falling through to full fsck\n\n");
 434                 }
 435                 /*
 436                  * Write the superblock so we don't try to recover the
 437                  * journal on another pass. If this is the only change
 438                  * to the filesystem, we do not want it to be called
 439                  * out as modified.
 440                  */
 441                 sblock.fs_mtime = time(NULL);
 442                 sbdirty();
 443                 ofsmodified = fsmodified;
 444                 flush(fswritefd, &sblk);
 445                 fsmodified = ofsmodified;
 446         }
 447         /*
 448          * If the filesystem was run on an old kernel that did not
 449          * support check hashes, clear the check-hash flags so that
 450          * we do not try to verify them.
 451          */
 452         if ((sblock.fs_flags & FS_METACKHASH) == 0)
 453                 sblock.fs_metackhash = 0;
 454         /*
 455          * If we are running on a kernel that can provide check hashes
 456          * that are not yet enabled for the filesystem and we are
 457          * running manually without the -y flag, offer to add any
 458          * supported check hashes that are not already enabled.
 459          */
 460         ckhashadd = 0;
 461         if (preen == 0 && yflag == 0 && sblock.fs_magic != FS_UFS1_MAGIC &&
 462             fswritefd != -1 && getosreldate() >= P_OSREL_CK_CYLGRP) {
 463                 if ((sblock.fs_metackhash & CK_CYLGRP) == 0 &&
 464                     reply("ADD CYLINDER GROUP CHECK-HASH PROTECTION") != 0) {
 465                         ckhashadd |= CK_CYLGRP;
 466                         sblock.fs_metackhash |= CK_CYLGRP;
 467                 }
 468                 if ((sblock.fs_metackhash & CK_SUPERBLOCK) == 0 &&
 469                     getosreldate() >= P_OSREL_CK_SUPERBLOCK &&
 470                     reply("ADD SUPERBLOCK CHECK-HASH PROTECTION") != 0) {
 471                         ckhashadd |= CK_SUPERBLOCK;
 472                         sblock.fs_metackhash |= CK_SUPERBLOCK;
 473                 }
 474                 if ((sblock.fs_metackhash & CK_INODE) == 0 &&
 475                     getosreldate() >= P_OSREL_CK_INODE &&
 476                     reply("ADD INODE CHECK-HASH PROTECTION") != 0) {
 477                         ckhashadd |= CK_INODE;
 478                         sblock.fs_metackhash |= CK_INODE;
 479                 }
 480 #ifdef notyet
 481                 if ((sblock.fs_metackhash & CK_INDIR) == 0 &&
 482                     getosreldate() >= P_OSREL_CK_INDIR &&
 483                     reply("ADD INDIRECT BLOCK CHECK-HASH PROTECTION") != 0) {
 484                         ckhashadd |= CK_INDIR;
 485                         sblock.fs_metackhash |= CK_INDIR;
 486                 }
 487                 if ((sblock.fs_metackhash & CK_DIR) == 0 &&
 488                     getosreldate() >= P_OSREL_CK_DIR &&
 489                     reply("ADD DIRECTORY CHECK-HASH PROTECTION") != 0) {
 490                         ckhashadd |= CK_DIR;
 491                         sblock.fs_metackhash |= CK_DIR;
 492                 }
 493 #endif /* notyet */
 494                 if (ckhashadd != 0) {
 495                         sblock.fs_flags |= FS_METACKHASH;
 496                         sbdirty();
 497                 }
 498         }
 499         /*
 500          * Cleared if any questions answered no. Used to decide if
 501          * the superblock should be marked clean.
 502          */
 503         resolved = 1;
 504         /*
 505          * 1: scan inodes tallying blocks used
 506          */
 507         if (preen == 0) {
 508                 printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
 509                 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS)
 510                         printf("** Root file system\n");
 511                 printf("** Phase 1 - Check Blocks and Sizes\n");
 512         }
 513         clock_gettime(CLOCK_REALTIME_PRECISE, &startprog);
 514         pass1();
 515         IOstats("Pass1");
 516
 517         /*
 518          * 1b: locate first references to duplicates, if any
 519          */
 520         if (duplist) {
 521                 if (preen || usedsoftdep)
 522                         pfatal("INTERNAL ERROR: dups with %s%s%s",
 523                             preen ? "-p" : "",
 524                             (preen && usedsoftdep) ? " and " : "",
 525                             usedsoftdep ? "softupdates" : "");
 526                 printf("** Phase 1b - Rescan For More DUPS\n");
 527                 pass1b();
 528                 IOstats("Pass1b");
 529         }
 530
 531         /*
 532          * 2: traverse directories from root to mark all connected directories
 533          */
 534         if (preen == 0)
 535                 printf("** Phase 2 - Check Pathnames\n");
 536         pass2();
 537         IOstats("Pass2");
 538
 539         /*
 540          * 3: scan inodes looking for disconnected directories
 541          */
 542         if (preen == 0)
 543                 printf("** Phase 3 - Check Connectivity\n");
 544         pass3();
 545         IOstats("Pass3");
 546
 547         /*
 548          * 4: scan inodes looking for disconnected files; check reference counts
 549          */
 550         if (preen == 0)
 551                 printf("** Phase 4 - Check Reference Counts\n");
 552         pass4();
 553         IOstats("Pass4");
 554
 555         /*
 556          * 5: check and repair resource counts in cylinder groups
 557          */
 558         if (preen == 0)
 559                 printf("** Phase 5 - Check Cyl groups\n");
 560         pass5();
 561         IOstats("Pass5");
 562
 563         /*
 564          * print out summary statistics
 565          */
 566         n_ffree = sblock.fs_cstotal.cs_nffree;
 567         n_bfree = sblock.fs_cstotal.cs_nbfree;
 568         files = maxino - UFS_ROOTINO - sblock.fs_cstotal.cs_nifree - n_files;
 569         blks = n_blks +
 570             sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
 571         blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
 572         blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
 573         blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks;
 574         if (bkgrdflag && (files > 0 || blks > 0)) {
 575                 countdirs = sblock.fs_cstotal.cs_ndir - countdirs;
 576                 pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n",
 577                     countdirs, files - countdirs, blks);
 578         }
 579         pwarn("%ld files, %jd used, %ju free ",
 580             (long)n_files, (intmax_t)n_blks,
 581             (uintmax_t)n_ffree + sblock.fs_frag * n_bfree);
 582         printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n",
 583             (uintmax_t)n_ffree, (uintmax_t)n_bfree,
 584             n_ffree * 100.0 / sblock.fs_dsize);
 585         if (debug) {
 586                 if (files < 0)
 587                         printf("%jd inodes missing\n", -files);
 588                 if (blks < 0)
 589                         printf("%jd blocks missing\n", -blks);
 590                 if (duplist != NULL) {
 591                         printf("The following duplicate blocks remain:");
 592                         for (dp = duplist; dp; dp = dp->next)
 593                                 printf(" %jd,", (intmax_t)dp->dup);
 594                         printf("\n");
 595                 }
 596         }
 597         duplist = (struct dups *)0;
 598         muldup = (struct dups *)0;
 599         inocleanup();
 600         if (fsmodified) {
 601                 sblock.fs_time = time(NULL);
 602                 sbdirty();
 603         }
 604         if (cvtlevel && sblk.b_dirty) {
 605                 /*
 606                  * Write out the duplicate super blocks
 607                  */
 608                 if (sbput(fswritefd, &sblock, sblock.fs_ncg) == 0)
 609                         fsmodified = 1;
 610         }
 611         if (rerun)
 612                 resolved = 0;
 613         finalIOstats();
 614
 615         /*
 616          * Check to see if the file system is mounted read-write.
 617          */
 618         if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0)
 619                 resolved = 0;
 620         ckfini(resolved);
 621
 622         for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
 623                 if (inostathead[cylno].il_stat != NULL)
 624                         free((char *)inostathead[cylno].il_stat);
 625         free((char *)inostathead);
 626         inostathead = NULL;
 627         if (fsmodified && !preen)
 628                 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
 629         if (rerun) {
 630                 if (wantrestart && (restarts++ < 10) &&
 631                     (preen || reply("RESTART")))
 632                         return (ERESTART);
 633                 printf("\n***** PLEASE RERUN FSCK *****\n");
 634         }
 635         if (chkdoreload(mntp) != 0) {
 636                 if (!fsmodified)
 637                         return (0);
 638                 if (!preen)
 639                         printf("\n***** REBOOT NOW *****\n");
 640                 sync();
 641                 return (4);
 642         }
 643         return (rerun ? ERERUN : 0);
 644 }
 645
 646 static int
 647 chkdoreload(struct statfs *mntp)
 648 {
 649         struct iovec *iov;
 650         int iovlen;
 651         char errmsg[255];
 652
 653         if (mntp == NULL)
 654                 return (0);
 655
 656         iov = NULL;
 657         iovlen = 0;
 658         errmsg[0] = '\0';
 659         /*
 660          * We modified a mounted file system.  Do a mount update on
 661          * it unless it is read-write, so we can continue using it
 662          * as safely as possible.
 663          */
 664         if (mntp->f_flags & MNT_RDONLY) {
 665                 build_iovec(&iov, &iovlen, "fstype", "ffs", 4);
 666                 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname,
 667                     (size_t)-1);
 668                 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname,
 669                     (size_t)-1);
 670                 build_iovec(&iov, &iovlen, "errmsg", errmsg,
 671                     sizeof(errmsg));
 672                 build_iovec(&iov, &iovlen, "update", NULL, 0);
 673                 build_iovec(&iov, &iovlen, "reload", NULL, 0);
 674                 /*
 675                  * XX: We need the following line until we clean up
 676                  * nmount parsing of root mounts and NFS root mounts.
 677                  */
 678                 build_iovec(&iov, &iovlen, "ro", NULL, 0);
 679                 if (nmount(iov, iovlen, mntp->f_flags) == 0) {
 680                         return (0);
 681                 }
 682                 pwarn("mount reload of '%s' failed: %s %s\n\n",
 683                     mntp->f_mntonname, strerror(errno), errmsg);
 684                 return (1);
 685         }
 686         return (0);
 687 }
 688
 689 /*
 690  * Get the mount point information for name.
 691  */
 692 static struct statfs *
 693 getmntpt(const char *name)
 694 {
 695         struct stat devstat, mntdevstat;
 696         char device[sizeof(_PATH_DEV) - 1 + MNAMELEN];
 697         char *ddevname;
 698         struct statfs *mntbuf, *statfsp;
 699         int i, mntsize, isdev;
 700
 701         if (stat(name, &devstat) != 0)
 702                 return (NULL);
 703         if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))
 704                 isdev = 1;
 705         else
 706                 isdev = 0;
 707         mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
 708         for (i = 0; i < mntsize; i++) {
 709                 statfsp = &mntbuf[i];
 710                 ddevname = statfsp->f_mntfromname;
 711                 if (*ddevname != '/') {
 712                         if (strlen(_PATH_DEV) + strlen(ddevname) + 1 >
 713                             sizeof(statfsp->f_mntfromname))
 714                                 continue;
 715                         strcpy(device, _PATH_DEV);
 716                         strcat(device, ddevname);
 717                         strcpy(statfsp->f_mntfromname, device);
 718                 }
 719                 if (isdev == 0) {
 720                         if (strcmp(name, statfsp->f_mntonname))
 721                                 continue;
 722                         return (statfsp);
 723                 }
 724                 if (stat(ddevname, &mntdevstat) == 0 &&
 725                     mntdevstat.st_rdev == devstat.st_rdev)
 726                         return (statfsp);
 727         }
 728         statfsp = NULL;
 729         return (statfsp);
 730 }
 731
 732 static void
 733 usage(void)
 734 {
 735         (void) fprintf(stderr,
 736 "usage: %s [-BCdEFfnpRrSyZ] [-b block] [-c level] [-m mode] filesystem ...\n",
 737             getprogname());
 738         exit(1);
 739 }
 740
 741 void
 742 infohandler(int sig __unused)
 743 {
 744         got_siginfo = 1;
 745 }
 746
 747 void
 748 alarmhandler(int sig __unused)
 749 {
 750         got_sigalarm = 1;
 751 }