sbin/fsck_ffs/main.c

   1 /*
   2  * Copyright (c) 1980, 1986, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #if 0
  31 #ifndef lint
  32 static const char copyright[] =
  33 "@(#) Copyright (c) 1980, 1986, 1993\n\
  34         The Regents of the University of California.  All rights reserved.\n";
  35 #endif /* not lint */
  36
  37 #ifndef lint
  38 static char sccsid[] = "@(#)main.c      8.6 (Berkeley) 5/14/95";
  39 #endif /* not lint */
  40 #endif
  41 #include <sys/cdefs.h>
  42 __FBSDID("$FreeBSD$");
  43
  44 #include <sys/param.h>
  45 #include <sys/file.h>
  46 #include <sys/mount.h>
  47 #include <sys/resource.h>
  48 #include <sys/stat.h>
  49 #include <sys/sysctl.h>
  50 #include <sys/uio.h>
  51 #include <sys/disklabel.h>
  52
  53 #include <ufs/ufs/dinode.h>
  54 #include <ufs/ffs/fs.h>
  55
  56 #include <err.h>
  57 #include <errno.h>
  58 #include <fstab.h>
  59 #include <grp.h>
  60 #include <mntopts.h>
  61 #include <paths.h>
  62 #include <stdint.h>
  63 #include <string.h>
  64 #include <time.h>
  65
  66 #include "fsck.h"
  67
  68 int     restarts;
  69
  70 static void usage(void) __dead2;
  71 static int argtoi(int flag, const char *req, const char *str, int base);
  72 static int checkfilesys(char *filesys);
  73 static int chkdoreload(struct statfs *mntp);
  74 static struct statfs *getmntpt(const char *);
  75
  76 int
  77 main(int argc, char *argv[])
  78 {
  79         int ch;
  80         struct rlimit rlimit;
  81         struct itimerval itimerval;
  82         int ret = 0;
  83
  84         sync();
  85         skipclean = 1;
  86         inoopt = 0;
  87         while ((ch = getopt(argc, argv, "b:Bc:CdEfFm:npRrSyZ")) != -1) {
  88                 switch (ch) {
  89                 case 'b':
  90                         skipclean = 0;
  91                         bflag = argtoi('b', "number", optarg, 10);
  92                         printf("Alternate super block location: %d\n", bflag);
  93                         break;
  94
  95                 case 'B':
  96                         bkgrdflag = 1;
  97                         break;
  98
  99                 case 'c':
 100                         skipclean = 0;
 101                         cvtlevel = argtoi('c', "conversion level", optarg, 10);
 102                         if (cvtlevel < 3)
 103                                 errx(EEXIT, "cannot do level %d conversion",
 104                                     cvtlevel);
 105                         break;
 106
 107                 case 'd':
 108                         debug++;
 109                         break;
 110
 111                 case 'E':
 112                         Eflag++;
 113                         break;
 114
 115                 case 'f':
 116                         skipclean = 0;
 117                         break;
 118
 119                 case 'F':
 120                         bkgrdcheck = 1;
 121                         break;
 122
 123                 case 'm':
 124                         lfmode = argtoi('m', "mode", optarg, 8);
 125                         if (lfmode &~ 07777)
 126                                 errx(EEXIT, "bad mode to -m: %o", lfmode);
 127                         printf("** lost+found creation mode %o\n", lfmode);
 128                         break;
 129
 130                 case 'n':
 131                         nflag++;
 132                         yflag = 0;
 133                         break;
 134
 135                 case 'p':
 136                         preen++;
 137                         /*FALLTHROUGH*/
 138
 139                 case 'C':
 140                         ckclean++;
 141                         break;
 142
 143                 case 'R':
 144                         wantrestart = 1;
 145                         break;
 146                 case 'r':
 147                         inoopt++;
 148                         break;
 149
 150                 case 'S':
 151                         surrender = 1;
 152                         break;
 153
 154                 case 'y':
 155                         yflag++;
 156                         nflag = 0;
 157                         break;
 158
 159                 case 'Z':
 160                         Zflag++;
 161                         break;
 162
 163                 default:
 164                         usage();
 165                 }
 166         }
 167         argc -= optind;
 168         argv += optind;
 169
 170         if (!argc)
 171                 usage();
 172
 173         if (signal(SIGINT, SIG_IGN) != SIG_IGN)
 174                 (void)signal(SIGINT, catch);
 175         if (ckclean)
 176                 (void)signal(SIGQUIT, catchquit);
 177         signal(SIGINFO, infohandler);
 178         if (bkgrdflag) {
 179                 signal(SIGALRM, alarmhandler);
 180                 itimerval.it_interval.tv_sec = 5;
 181                 itimerval.it_interval.tv_usec = 0;
 182                 itimerval.it_value.tv_sec = 5;
 183                 itimerval.it_value.tv_usec = 0;
 184                 setitimer(ITIMER_REAL, &itimerval, NULL);
 185         }
 186         /*
 187          * Push up our allowed memory limit so we can cope
 188          * with huge file systems.
 189          */
 190         if (getrlimit(RLIMIT_DATA, &rlimit) == 0) {
 191                 rlimit.rlim_cur = rlimit.rlim_max;
 192                 (void)setrlimit(RLIMIT_DATA, &rlimit);
 193         }
 194         while (argc > 0) {
 195                 if (checkfilesys(*argv) == ERESTART)
 196                         continue;
 197                 argc--;
 198                 argv++;
 199         }
 200
 201         if (returntosingle)
 202                 ret = 2;
 203         exit(ret);
 204 }
 205
 206 static int
 207 argtoi(int flag, const char *req, const char *str, int base)
 208 {
 209         char *cp;
 210         int ret;
 211
 212         ret = (int)strtol(str, &cp, base);
 213         if (cp == str || *cp)
 214                 errx(EEXIT, "-%c flag requires a %s", flag, req);
 215         return (ret);
 216 }
 217
 218 /*
 219  * Check the specified file system.
 220  */
 221 /* ARGSUSED */
 222 static int
 223 checkfilesys(char *filesys)
 224 {
 225         ufs2_daddr_t n_ffree, n_bfree;
 226         struct dups *dp;
 227         struct statfs *mntp;
 228         struct stat snapdir;
 229         struct group *grp;
 230         struct iovec *iov;
 231         char errmsg[255];
 232         int iovlen;
 233         int cylno;
 234         intmax_t blks, files;
 235         size_t size;
 236
 237         iov = NULL;
 238         iovlen = 0;
 239         errmsg[0] = '\0';
 240         fsutilinit();
 241         fsckinit();
 242
 243         cdevname = filesys;
 244         if (debug && ckclean)
 245                 pwarn("starting\n");
 246         /*
 247          * Make best effort to get the disk name. Check first to see
 248          * if it is listed among the mounted file systems. Failing that
 249          * check to see if it is listed in /etc/fstab.
 250          */
 251         mntp = getmntpt(filesys);
 252         if (mntp != NULL)
 253                 filesys = mntp->f_mntfromname;
 254         else
 255                 filesys = blockcheck(filesys);
 256         /*
 257          * If -F flag specified, check to see whether a background check
 258          * is possible and needed. If possible and needed, exit with
 259          * status zero. Otherwise exit with status non-zero. A non-zero
 260          * exit status will cause a foreground check to be run.
 261          */
 262         sblock_init();
 263         if (bkgrdcheck) {
 264                 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0)
 265                         exit(3);        /* Cannot read superblock */
 266                 close(fsreadfd);
 267                 /* Earlier background failed or journaled */
 268                 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ))
 269                         exit(4);
 270                 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0)
 271                         exit(5);        /* Not running soft updates */
 272                 size = MIBSIZE;
 273                 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0)
 274                         exit(6);        /* Lacks kernel support */
 275                 if ((mntp == NULL && sblock.fs_clean == 1) ||
 276                     (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0))
 277                         exit(7);        /* Filesystem clean, report it now */
 278                 exit(0);
 279         }
 280         if (ckclean && skipclean) {
 281                 /*
 282                  * If file system is gjournaled, check it here.
 283                  */
 284                 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0)
 285                         exit(3);        /* Cannot read superblock */
 286                 close(fsreadfd);
 287                 if ((sblock.fs_flags & FS_GJOURNAL) != 0) {
 288                         //printf("GJournaled file system detected on %s.\n",
 289                         //    filesys);
 290                         if (sblock.fs_clean == 1) {
 291                                 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
 292                                 exit(0);
 293                         }
 294                         if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) {
 295                                 gjournal_check(filesys);
 296                                 if (chkdoreload(mntp) == 0)
 297                                         exit(0);
 298                                 exit(4);
 299                         } else {
 300                                 pfatal(
 301                             "UNEXPECTED INCONSISTENCY, CANNOT RUN FAST FSCK\n");
 302                         }
 303                 }
 304         }
 305         /*
 306          * If we are to do a background check:
 307          *      Get the mount point information of the file system
 308          *      create snapshot file
 309          *      return created snapshot file
 310          *      if not found, clear bkgrdflag and proceed with normal fsck
 311          */
 312         if (bkgrdflag) {
 313                 if (mntp == NULL) {
 314                         bkgrdflag = 0;
 315                         pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n");
 316                 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) {
 317                         bkgrdflag = 0;
 318                         pfatal(
 319                           "NOT USING SOFT UPDATES, CANNOT RUN IN BACKGROUND\n");
 320                 } else if ((mntp->f_flags & MNT_RDONLY) != 0) {
 321                         bkgrdflag = 0;
 322                         pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n");
 323                 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) {
 324                         if (readsb(0) != 0) {
 325                                 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) {
 326                                         bkgrdflag = 0;
 327                                         pfatal(
 328                         "UNEXPECTED INCONSISTENCY, CANNOT RUN IN BACKGROUND\n");
 329                                 }
 330                                 if ((sblock.fs_flags & FS_UNCLEAN) == 0 &&
 331                                     skipclean && ckclean) {
 332                                         /*
 333                                          * file system is clean;
 334                                          * skip snapshot and report it clean
 335                                          */
 336                                         pwarn(
 337                                         "FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
 338                                         goto clean;
 339                                 }
 340                         }
 341                         close(fsreadfd);
 342                 }
 343                 if (bkgrdflag) {
 344                         snprintf(snapname, sizeof snapname, "%s/.snap",
 345                             mntp->f_mntonname);
 346                         if (stat(snapname, &snapdir) < 0) {
 347                                 if (errno != ENOENT) {
 348                                         bkgrdflag = 0;
 349                                         pfatal(
 350         "CANNOT FIND SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n",
 351                                             snapname, strerror(errno));
 352                                 } else if ((grp = getgrnam("operator")) == 0 ||
 353                                     mkdir(snapname, 0770) < 0 ||
 354                                     chown(snapname, -1, grp->gr_gid) < 0 ||
 355                                     chmod(snapname, 0770) < 0) {
 356                                         bkgrdflag = 0;
 357                                         pfatal(
 358         "CANNOT CREATE SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n",
 359                                             snapname, strerror(errno));
 360                                 }
 361                         } else if (!S_ISDIR(snapdir.st_mode)) {
 362                                 bkgrdflag = 0;
 363                                 pfatal(
 364                         "%s IS NOT A DIRECTORY, CANNOT RUN IN BACKGROUND\n",
 365                                     snapname);
 366                         }
 367                 }
 368                 if (bkgrdflag) {
 369                         snprintf(snapname, sizeof snapname,
 370                             "%s/.snap/fsck_snapshot", mntp->f_mntonname);
 371                         build_iovec(&iov, &iovlen, "fstype", "ffs", 4);
 372                         build_iovec(&iov, &iovlen, "from", snapname,
 373                             (size_t)-1);
 374                         build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname,
 375                             (size_t)-1);
 376                         build_iovec(&iov, &iovlen, "errmsg", errmsg,
 377                             sizeof(errmsg));
 378                         build_iovec(&iov, &iovlen, "update", NULL, 0);
 379                         build_iovec(&iov, &iovlen, "snapshot", NULL, 0);
 380
 381                         while (nmount(iov, iovlen, mntp->f_flags) < 0) {
 382                                 if (errno == EEXIST && unlink(snapname) == 0)
 383                                         continue;
 384                                 bkgrdflag = 0;
 385                                 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n",
 386                                     snapname, strerror(errno), errmsg);
 387                                 break;
 388                         }
 389                         if (bkgrdflag != 0)
 390                                 filesys = snapname;
 391                 }
 392         }
 393
 394         switch (setup(filesys)) {
 395         case 0:
 396                 if (preen)
 397                         pfatal("CAN'T CHECK FILE SYSTEM.");
 398                 return (0);
 399         case -1:
 400         clean:
 401                 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree +
 402                     sblock.fs_frag * sblock.fs_cstotal.cs_nbfree));
 403                 printf("(%jd frags, %jd blocks, %.1f%% fragmentation)\n",
 404                     (intmax_t)sblock.fs_cstotal.cs_nffree,
 405                     (intmax_t)sblock.fs_cstotal.cs_nbfree,
 406                     sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize);
 407                 return (0);
 408         }
 409         /*
 410          * Determine if we can and should do journal recovery.
 411          */
 412         if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) {
 413                 if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK && skipclean) {
 414                         if (preen || reply("USE JOURNAL")) {
 415                                 if (suj_check(filesys) == 0) {
 416                                         printf("\n***** FILE SYSTEM MARKED CLEAN *****\n");
 417                                         if (chkdoreload(mntp) == 0)
 418                                                 exit(0);
 419                                         exit(4);
 420                                 }
 421                         }
 422                         printf("** Skipping journal, falling through to full fsck\n\n");
 423                 }
 424                 /*
 425                  * Write the superblock so we don't try to recover the
 426                  * journal on another pass.
 427                  */
 428                 sblock.fs_mtime = time(NULL);
 429                 sbdirty();
 430         }
 431
 432         /*
 433          * Cleared if any questions answered no. Used to decide if
 434          * the superblock should be marked clean.
 435          */
 436         resolved = 1;
 437         /*
 438          * 1: scan inodes tallying blocks used
 439          */
 440         if (preen == 0) {
 441                 printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
 442                 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS)
 443                         printf("** Root file system\n");
 444                 printf("** Phase 1 - Check Blocks and Sizes\n");
 445         }
 446         clock_gettime(CLOCK_REALTIME_PRECISE, &startprog);
 447         pass1();
 448         IOstats("Pass1");
 449
 450         /*
 451          * 1b: locate first references to duplicates, if any
 452          */
 453         if (duplist) {
 454                 if (preen || usedsoftdep)
 455                         pfatal("INTERNAL ERROR: dups with %s%s%s",
 456                             preen ? "-p" : "",
 457                             (preen && usedsoftdep) ? " and " : "",
 458                             usedsoftdep ? "softupdates" : "");
 459                 printf("** Phase 1b - Rescan For More DUPS\n");
 460                 pass1b();
 461                 IOstats("Pass1b");
 462         }
 463
 464         /*
 465          * 2: traverse directories from root to mark all connected directories
 466          */
 467         if (preen == 0)
 468                 printf("** Phase 2 - Check Pathnames\n");
 469         pass2();
 470         IOstats("Pass2");
 471
 472         /*
 473          * 3: scan inodes looking for disconnected directories
 474          */
 475         if (preen == 0)
 476                 printf("** Phase 3 - Check Connectivity\n");
 477         pass3();
 478         IOstats("Pass3");
 479
 480         /*
 481          * 4: scan inodes looking for disconnected files; check reference counts
 482          */
 483         if (preen == 0)
 484                 printf("** Phase 4 - Check Reference Counts\n");
 485         pass4();
 486         IOstats("Pass4");
 487
 488         /*
 489          * 5: check and repair resource counts in cylinder groups
 490          */
 491         if (preen == 0)
 492                 printf("** Phase 5 - Check Cyl groups\n");
 493         pass5();
 494         IOstats("Pass5");
 495
 496         /*
 497          * print out summary statistics
 498          */
 499         n_ffree = sblock.fs_cstotal.cs_nffree;
 500         n_bfree = sblock.fs_cstotal.cs_nbfree;
 501         files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files;
 502         blks = n_blks +
 503             sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
 504         blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
 505         blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
 506         blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks;
 507         if (bkgrdflag && (files > 0 || blks > 0)) {
 508                 countdirs = sblock.fs_cstotal.cs_ndir - countdirs;
 509                 pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n",
 510                     countdirs, files - countdirs, blks);
 511         }
 512         pwarn("%ld files, %jd used, %ju free ",
 513             (long)n_files, (intmax_t)n_blks,
 514             (uintmax_t)n_ffree + sblock.fs_frag * n_bfree);
 515         printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n",
 516             (uintmax_t)n_ffree, (uintmax_t)n_bfree,
 517             n_ffree * 100.0 / sblock.fs_dsize);
 518         if (debug) {
 519                 if (files < 0)
 520                         printf("%jd inodes missing\n", -files);
 521                 if (blks < 0)
 522                         printf("%jd blocks missing\n", -blks);
 523                 if (duplist != NULL) {
 524                         printf("The following duplicate blocks remain:");
 525                         for (dp = duplist; dp; dp = dp->next)
 526                                 printf(" %jd,", (intmax_t)dp->dup);
 527                         printf("\n");
 528                 }
 529         }
 530         duplist = (struct dups *)0;
 531         muldup = (struct dups *)0;
 532         inocleanup();
 533         if (fsmodified) {
 534                 sblock.fs_time = time(NULL);
 535                 sbdirty();
 536         }
 537         if (cvtlevel && sblk.b_dirty) {
 538                 /*
 539                  * Write out the duplicate super blocks
 540                  */
 541                 for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
 542                         blwrite(fswritefd, (char *)&sblock,
 543                             fsbtodb(&sblock, cgsblock(&sblock, cylno)),
 544                             SBLOCKSIZE);
 545         }
 546         if (rerun)
 547                 resolved = 0;
 548         finalIOstats();
 549
 550         /*
 551          * Check to see if the file system is mounted read-write.
 552          */
 553         if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0)
 554                 resolved = 0;
 555         ckfini(resolved);
 556
 557         for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
 558                 if (inostathead[cylno].il_stat != NULL)
 559                         free((char *)inostathead[cylno].il_stat);
 560         free((char *)inostathead);
 561         inostathead = NULL;
 562         if (fsmodified && !preen)
 563                 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
 564         if (rerun) {
 565                 if (wantrestart && (restarts++ < 10) &&
 566                     (preen || reply("RESTART")))
 567                         return (ERESTART);
 568                 printf("\n***** PLEASE RERUN FSCK *****\n");
 569         }
 570         if (chkdoreload(mntp) != 0) {
 571                 if (!fsmodified)
 572                         return (0);
 573                 if (!preen)
 574                         printf("\n***** REBOOT NOW *****\n");
 575                 sync();
 576                 return (4);
 577         }
 578         return (0);
 579 }
 580
 581 static int
 582 chkdoreload(struct statfs *mntp)
 583 {
 584         struct iovec *iov;
 585         int iovlen;
 586         char errmsg[255];
 587
 588         if (mntp == NULL)
 589                 return (0);
 590
 591         iov = NULL;
 592         iovlen = 0;
 593         errmsg[0] = '\0';
 594         /*
 595          * We modified a mounted file system.  Do a mount update on
 596          * it unless it is read-write, so we can continue using it
 597          * as safely as possible.
 598          */
 599         if (mntp->f_flags & MNT_RDONLY) {
 600                 build_iovec(&iov, &iovlen, "fstype", "ffs", 4);
 601                 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname,
 602                     (size_t)-1);
 603                 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname,
 604                     (size_t)-1);
 605                 build_iovec(&iov, &iovlen, "errmsg", errmsg,
 606                     sizeof(errmsg));
 607                 build_iovec(&iov, &iovlen, "update", NULL, 0);
 608                 build_iovec(&iov, &iovlen, "reload", NULL, 0);
 609                 /*
 610                  * XX: We need the following line until we clean up
 611                  * nmount parsing of root mounts and NFS root mounts.
 612                  */
 613                 build_iovec(&iov, &iovlen, "ro", NULL, 0);
 614                 if (nmount(iov, iovlen, mntp->f_flags) == 0) {
 615                         return (0);
 616                 }
 617                 pwarn("mount reload of '%s' failed: %s %s\n\n",
 618                     mntp->f_mntonname, strerror(errno), errmsg);
 619                 return (1);
 620         }
 621         return (0);
 622 }
 623
 624 /*
 625  * Get the mount point information for name.
 626  */
 627 static struct statfs *
 628 getmntpt(const char *name)
 629 {
 630         struct stat devstat, mntdevstat;
 631         char device[sizeof(_PATH_DEV) - 1 + MNAMELEN];
 632         char *ddevname;
 633         struct statfs *mntbuf, *statfsp;
 634         int i, mntsize, isdev;
 635
 636         if (stat(name, &devstat) != 0)
 637                 return (NULL);
 638         if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))
 639                 isdev = 1;
 640         else
 641                 isdev = 0;
 642         mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
 643         for (i = 0; i < mntsize; i++) {
 644                 statfsp = &mntbuf[i];
 645                 ddevname = statfsp->f_mntfromname;
 646                 if (*ddevname != '/') {
 647                         strcpy(device, _PATH_DEV);
 648                         strcat(device, ddevname);
 649                         strcpy(statfsp->f_mntfromname, device);
 650                 }
 651                 if (isdev == 0) {
 652                         if (strcmp(name, statfsp->f_mntonname))
 653                                 continue;
 654                         return (statfsp);
 655                 }
 656                 if (stat(ddevname, &mntdevstat) == 0 &&
 657                     mntdevstat.st_rdev == devstat.st_rdev)
 658                         return (statfsp);
 659         }
 660         statfsp = NULL;
 661         return (statfsp);
 662 }
 663
 664 static void
 665 usage(void)
 666 {
 667         (void) fprintf(stderr,
 668 "usage: %s [-BEFfnpry] [-b block] [-c level] [-m mode] filesystem ...\n",
 669             getprogname());
 670         exit(1);
 671 }
 672
 673 void
 674 infohandler(int sig __unused)
 675 {
 676         got_siginfo = 1;
 677 }
 678
 679 void
 680 alarmhandler(int sig __unused)
 681 {
 682         got_sigalarm = 1;
 683 }