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/stat.h>
  46 #include <sys/file.h>
  47 #include <sys/time.h>
  48 #include <sys/mount.h>
  49 #include <sys/resource.h>
  50 #include <sys/sysctl.h>
  51 #include <sys/uio.h>
  52 #include <sys/disklabel.h>
  53
  54 #include <ufs/ufs/dinode.h>
  55 #include <ufs/ffs/fs.h>
  56
  57 #include <err.h>
  58 #include <errno.h>
  59 #include <fstab.h>
  60 #include <grp.h>
  61 #include <mntopts.h>
  62 #include <paths.h>
  63 #include <stdint.h>
  64 #include <string.h>
  65
  66 #include "fsck.h"
  67
  68 static void usage(void) __dead2;
  69 static int argtoi(int flag, const char *req, const char *str, int base);
  70 static int checkfilesys(char *filesys);
  71 static int chkdoreload(struct statfs *mntp);
  72 static struct statfs *getmntpt(const char *);
  73
  74 int
  75 main(int argc, char *argv[])
  76 {
  77         int ch;
  78         struct rlimit rlimit;
  79         struct itimerval itimerval;
  80         int ret = 0;
  81
  82         sync();
  83         skipclean = 1;
  84         damagedflag = 0;
  85         while ((ch = getopt(argc, argv, "b:Bc:dDfFm:npy")) != -1) {
  86                 switch (ch) {
  87                 case 'b':
  88                         skipclean = 0;
  89                         bflag = argtoi('b', "number", optarg, 10);
  90                         printf("Alternate super block location: %d\n", bflag);
  91                         break;
  92
  93                 case 'B':
  94                         bkgrdflag = 1;
  95                         break;
  96
  97                 case 'c':
  98                         skipclean = 0;
  99                         cvtlevel = argtoi('c', "conversion level", optarg, 10);
 100                         if (cvtlevel < 3)
 101                                 errx(EEXIT, "cannot do level %d conversion",
 102                                     cvtlevel);
 103                         break;
 104
 105                 case 'd':
 106                         debug++;
 107                         break;
 108
 109                 case 'D':
 110                         damagedflag = 1;
 111                         /* FALLTHROUGH */
 112
 113                 case 'f':
 114                         skipclean = 0;
 115                         break;
 116
 117                 case 'F':
 118                         bkgrdcheck = 1;
 119                         break;
 120
 121                 case 'm':
 122                         lfmode = argtoi('m', "mode", optarg, 8);
 123                         if (lfmode &~ 07777)
 124                                 errx(EEXIT, "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 'y':
 138                         yflag++;
 139                         nflag = 0;
 140                         break;
 141
 142                 default:
 143                         usage();
 144                 }
 145         }
 146         argc -= optind;
 147         argv += optind;
 148
 149         if (!argc)
 150                 usage();
 151
 152         if (signal(SIGINT, SIG_IGN) != SIG_IGN)
 153                 (void)signal(SIGINT, catch);
 154         if (preen)
 155                 (void)signal(SIGQUIT, catchquit);
 156         signal(SIGINFO, infohandler);
 157         if (bkgrdflag) {
 158                 signal(SIGALRM, alarmhandler);
 159                 itimerval.it_interval.tv_sec = 5;
 160                 itimerval.it_interval.tv_usec = 0;
 161                 itimerval.it_value.tv_sec = 5;
 162                 itimerval.it_value.tv_usec = 0;
 163                 setitimer(ITIMER_REAL, &itimerval, NULL);
 164         }
 165         /*
 166          * Push up our allowed memory limit so we can cope
 167          * with huge file systems.
 168          */
 169         if (getrlimit(RLIMIT_DATA, &rlimit) == 0) {
 170                 rlimit.rlim_cur = rlimit.rlim_max;
 171                 (void)setrlimit(RLIMIT_DATA, &rlimit);
 172         }
 173         while (argc-- > 0)
 174                 (void)checkfilesys(*argv++);
 175
 176         if (returntosingle)
 177                 ret = 2;
 178         exit(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                 errx(EEXIT, "-%c flag requires a %s", flag, req);
 190         return (ret);
 191 }
 192
 193 /*
 194  * Check the specified file system.
 195  */
 196 /* ARGSUSED */
 197 static int
 198 checkfilesys(char *filesys)
 199 {
 200         ufs2_daddr_t n_ffree, n_bfree;
 201         struct dups *dp;
 202         struct statfs *mntp;
 203         struct stat snapdir;
 204         struct group *grp;
 205         ufs2_daddr_t blks;
 206         struct iovec *iov;
 207         char errmsg[255];
 208         int iovlen;
 209         int fflags;
 210         int cylno;
 211         ino_t files;
 212         size_t size;
 213
 214         iov = NULL;
 215         iovlen = 0;
 216         errmsg[0] = '\0';
 217
 218         cdevname = filesys;
 219         if (debug && preen)
 220                 pwarn("starting\n");
 221         /*
 222          * Make best effort to get the disk name. Check first to see
 223          * if it is listed among the mounted file systems. Failing that
 224          * check to see if it is listed in /etc/fstab.
 225          */
 226         mntp = getmntpt(filesys);
 227         if (mntp != NULL)
 228                 filesys = mntp->f_mntfromname;
 229         else
 230                 filesys = blockcheck(filesys);
 231         /*
 232          * If -F flag specified, check to see whether a background check
 233          * is possible and needed. If possible and needed, exit with
 234          * status zero. Otherwise exit with status non-zero. A non-zero
 235          * exit status will cause a foreground check to be run.
 236          */
 237         sblock_init();
 238         if (bkgrdcheck) {
 239                 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0)
 240                         exit(3);        /* Cannot read superblock */
 241                 close(fsreadfd);
 242                 if (sblock.fs_flags & FS_NEEDSFSCK)
 243                         exit(4);        /* Earlier background failed */
 244                 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0)
 245                         exit(5);        /* Not running soft updates */
 246                 size = MIBSIZE;
 247                 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0)
 248                         exit(6);        /* Lacks kernel support */
 249                 if ((mntp == NULL && sblock.fs_clean == 1) ||
 250                     (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0))
 251                         exit(7);        /* Filesystem clean, report it now */
 252                 exit(0);
 253         }
 254         if (preen && skipclean) {
 255                 /*
 256                  * If file system is gjournaled, check it here.
 257                  */
 258                 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0)
 259                         exit(3);        /* Cannot read superblock */
 260                 close(fsreadfd);
 261                 if ((sblock.fs_flags & FS_GJOURNAL) != 0) {
 262                         //printf("GJournaled file system detected on %s.\n",
 263                         //    filesys);
 264                         if (sblock.fs_clean == 1) {
 265                                 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
 266                                 exit(0);
 267                         }
 268                         if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) {
 269                                 gjournal_check(filesys);
 270                                 if (chkdoreload(mntp) == 0)
 271                                         exit(0);
 272                                 exit(4);
 273                         } else {
 274                                 pfatal("UNEXPECTED INCONSISTENCY, %s\n",
 275                                     "CANNOT RUN FAST FSCK\n");
 276                         }
 277                 }
 278         }
 279         /*
 280          * If we are to do a background check:
 281          *      Get the mount point information of the file system
 282          *      create snapshot file
 283          *      return created snapshot file
 284          *      if not found, clear bkgrdflag and proceed with normal fsck
 285          */
 286         if (bkgrdflag) {
 287                 if (mntp == NULL) {
 288                         bkgrdflag = 0;
 289                         pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n");
 290                 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) {
 291                         bkgrdflag = 0;
 292                         pfatal("NOT USING SOFT UPDATES, %s\n",
 293                             "CANNOT RUN IN BACKGROUND");
 294                 } else if ((mntp->f_flags & MNT_RDONLY) != 0) {
 295                         bkgrdflag = 0;
 296                         pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n");
 297                 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) {
 298                         if (readsb(0) != 0) {
 299                                 if (sblock.fs_flags & FS_NEEDSFSCK) {
 300                                         bkgrdflag = 0;
 301                                         pfatal("UNEXPECTED INCONSISTENCY, %s\n",
 302                                             "CANNOT RUN IN BACKGROUND\n");
 303                                 }
 304                                 if ((sblock.fs_flags & FS_UNCLEAN) == 0 &&
 305                                     skipclean && preen) {
 306                                         /*
 307                                          * file system is clean;
 308                                          * skip snapshot and report it clean
 309                                          */
 310                                         pwarn("FILE SYSTEM CLEAN; %s\n",
 311                                             "SKIPPING CHECKS");
 312                                         goto clean;
 313                                 }
 314                         }
 315                         close(fsreadfd);
 316                 }
 317                 if (bkgrdflag) {
 318                         snprintf(snapname, sizeof snapname, "%s/.snap",
 319                             mntp->f_mntonname);
 320                         if (stat(snapname, &snapdir) < 0) {
 321                                 if (errno != ENOENT) {
 322                                         bkgrdflag = 0;
 323                                         pfatal("CANNOT FIND %s %s: %s, %s\n",
 324                                             "SNAPSHOT DIRECTORY",
 325                                             snapname, strerror(errno),
 326                                             "CANNOT RUN IN BACKGROUND");
 327                                 } else if ((grp = getgrnam("operator")) == 0 ||
 328                                     mkdir(snapname, 0770) < 0 ||
 329                                     chown(snapname, -1, grp->gr_gid) < 0 ||
 330                                     chmod(snapname, 0770) < 0) {
 331                                         bkgrdflag = 0;
 332                                         pfatal("CANNOT CREATE %s %s: %s, %s\n",
 333                                             "SNAPSHOT DIRECTORY",
 334                                             snapname, strerror(errno),
 335                                             "CANNOT RUN IN BACKGROUND");
 336                                 }
 337                         } else if (!S_ISDIR(snapdir.st_mode)) {
 338                                 bkgrdflag = 0;
 339                                 pfatal("%s IS NOT A DIRECTORY, %s\n", snapname,
 340                                     "CANNOT RUN IN BACKGROUND");
 341                         }
 342                 }
 343                 if (bkgrdflag) {
 344                         snprintf(snapname, sizeof snapname,
 345                             "%s/.snap/fsck_snapshot", mntp->f_mntonname);
 346                         fflags = mntp->f_flags;
 347                         /*
 348                          * XXX: Need to kick out MNT_ROOTFS until we fix
 349                          * nmount().
 350                          */
 351                         fflags &= ~MNT_ROOTFS;
 352                         fflags = fflags | MNT_UPDATE | MNT_SNAPSHOT;
 353                         build_iovec(&iov, &iovlen, "fstype", "ffs", 4);
 354                         build_iovec(&iov, &iovlen, "from", snapname,
 355                             (size_t)-1);
 356                         build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname,
 357                             (size_t)-1);
 358                         build_iovec(&iov, &iovlen, "errmsg", errmsg,
 359                             sizeof(errmsg));
 360
 361                         while (nmount(iov, iovlen, fflags) < 0) {
 362                                 if (errno == EEXIST && unlink(snapname) == 0)
 363                                         continue;
 364                                 bkgrdflag = 0;
 365                                 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n",
 366                                     snapname, strerror(errno), errmsg);
 367                                 break;
 368                         }
 369                         if (bkgrdflag != 0)
 370                                 filesys = snapname;
 371                 }
 372         }
 373
 374         switch (setup(filesys)) {
 375         case 0:
 376                 if (preen)
 377                         pfatal("CAN'T CHECK FILE SYSTEM.");
 378                 return (0);
 379         case -1:
 380         clean:
 381                 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree +
 382                     sblock.fs_frag * sblock.fs_cstotal.cs_nbfree));
 383                 printf("(%lld frags, %lld blocks, %.1f%% fragmentation)\n",
 384                     (long long)sblock.fs_cstotal.cs_nffree,
 385                     (long long)sblock.fs_cstotal.cs_nbfree,
 386                     sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize);
 387                 return (0);
 388         }
 389
 390         /*
 391          * Cleared if any questions answered no. Used to decide if
 392          * the superblock should be marked clean.
 393          */
 394         resolved = 1;
 395         /*
 396          * 1: scan inodes tallying blocks used
 397          */
 398         if (preen == 0) {
 399                 printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
 400                 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS)
 401                         printf("** Root file system\n");
 402                 printf("** Phase 1 - Check Blocks and Sizes\n");
 403         }
 404         pass1();
 405
 406         /*
 407          * 1b: locate first references to duplicates, if any
 408          */
 409         if (duplist) {
 410                 if (preen || usedsoftdep)
 411                         pfatal("INTERNAL ERROR: dups with -p");
 412                 printf("** Phase 1b - Rescan For More DUPS\n");
 413                 pass1b();
 414         }
 415
 416         /*
 417          * 2: traverse directories from root to mark all connected directories
 418          */
 419         if (preen == 0)
 420                 printf("** Phase 2 - Check Pathnames\n");
 421         pass2();
 422
 423         /*
 424          * 3: scan inodes looking for disconnected directories
 425          */
 426         if (preen == 0)
 427                 printf("** Phase 3 - Check Connectivity\n");
 428         pass3();
 429
 430         /*
 431          * 4: scan inodes looking for disconnected files; check reference counts
 432          */
 433         if (preen == 0)
 434                 printf("** Phase 4 - Check Reference Counts\n");
 435         pass4();
 436
 437         /*
 438          * 5: check and repair resource counts in cylinder groups
 439          */
 440         if (preen == 0)
 441                 printf("** Phase 5 - Check Cyl groups\n");
 442         pass5();
 443
 444         /*
 445          * print out summary statistics
 446          */
 447         n_ffree = sblock.fs_cstotal.cs_nffree;
 448         n_bfree = sblock.fs_cstotal.cs_nbfree;
 449         files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files;
 450         blks = n_blks +
 451             sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
 452         blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
 453         blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
 454         blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks;
 455         if (bkgrdflag && (files > 0 || blks > 0)) {
 456                 countdirs = sblock.fs_cstotal.cs_ndir - countdirs;
 457                 pwarn("Reclaimed: %ld directories, %ld files, %lld fragments\n",
 458                     countdirs, (long)files - countdirs, (long long)blks);
 459         }
 460         pwarn("%ld files, %jd used, %ju free ",
 461             (long)n_files, (intmax_t)n_blks,
 462             (uintmax_t)n_ffree + sblock.fs_frag * n_bfree);
 463         printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n",
 464             (uintmax_t)n_ffree, (uintmax_t)n_bfree,
 465             n_ffree * 100.0 / sblock.fs_dsize);
 466         if (debug) {
 467                 if (files < 0)
 468                         printf("%d inodes missing\n", -files);
 469                 if (blks < 0)
 470                         printf("%lld blocks missing\n", -(long long)blks);
 471                 if (duplist != NULL) {
 472                         printf("The following duplicate blocks remain:");
 473                         for (dp = duplist; dp; dp = dp->next)
 474                                 printf(" %lld,", (long long)dp->dup);
 475                         printf("\n");
 476                 }
 477         }
 478         duplist = (struct dups *)0;
 479         muldup = (struct dups *)0;
 480         inocleanup();
 481         if (fsmodified) {
 482                 sblock.fs_time = time(NULL);
 483                 sbdirty();
 484         }
 485         if (cvtlevel && sblk.b_dirty) {
 486                 /*
 487                  * Write out the duplicate super blocks
 488                  */
 489                 for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
 490                         blwrite(fswritefd, (char *)&sblock,
 491                             fsbtodb(&sblock, cgsblock(&sblock, cylno)),
 492                             SBLOCKSIZE);
 493         }
 494         if (rerun)
 495                 resolved = 0;
 496
 497         /*
 498          * Check to see if the file system is mounted read-write.
 499          */
 500         if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0)
 501                 resolved = 0;
 502         ckfini(resolved);
 503
 504         for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
 505                 if (inostathead[cylno].il_stat != NULL)
 506                         free((char *)inostathead[cylno].il_stat);
 507         free((char *)inostathead);
 508         inostathead = NULL;
 509         if (fsmodified && !preen)
 510                 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
 511         if (rerun)
 512                 printf("\n***** PLEASE RERUN FSCK *****\n");
 513         if (chkdoreload(mntp) != 0) {
 514                 if (!fsmodified)
 515                         return (0);
 516                 if (!preen)
 517                         printf("\n***** REBOOT NOW *****\n");
 518                 sync();
 519                 return (4);
 520         }
 521         return (0);
 522 }
 523
 524 static int
 525 chkdoreload(struct statfs *mntp)
 526 {
 527         struct iovec *iov;
 528         int iovlen;
 529         int fflags;
 530         char errmsg[255];
 531
 532         if (mntp == NULL)
 533                 return (0);
 534
 535         iov = NULL;
 536         iovlen = 0;
 537         errmsg[0] = '\0';
 538         fflags = mntp->f_flags;
 539         /*
 540          * We modified a mounted file system.  Do a mount update on
 541          * it unless it is read-write, so we can continue using it
 542          * as safely as possible.
 543          */
 544         if (mntp->f_flags & MNT_RDONLY) {
 545                 /*
 546                  * XXX: Need to kick out MNT_ROOTFS until we fix
 547                  * nmount().
 548                  */
 549                 fflags &= ~MNT_ROOTFS;
 550                 fflags = fflags | MNT_RELOAD;
 551                 build_iovec(&iov, &iovlen, "fstype", "ffs", 4);
 552                 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname,
 553                     (size_t)-1);
 554                 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname,
 555                     (size_t)-1);
 556                 build_iovec(&iov, &iovlen, "errmsg", errmsg,
 557                     sizeof(errmsg));
 558                 build_iovec(&iov, &iovlen, "update", NULL, 0);
 559                 /*
 560                  * XX: We need the following line until we clean up
 561                  * nmount parsing of root mounts and NFS root mounts.
 562                  */
 563                 build_iovec(&iov, &iovlen, "ro", NULL, 0);
 564                 if (nmount(iov, iovlen, fflags) == 0) {
 565                         return (0);
 566                 }
 567                 pwarn("mount reload of '%s' failed: %s %s\n\n",
 568                     mntp->f_mntonname, strerror(errno), errmsg);
 569                 return (1);
 570         }
 571         return (0);
 572 }
 573
 574 /*
 575  * Get the mount point information for name.
 576  */
 577 static struct statfs *
 578 getmntpt(const char *name)
 579 {
 580         struct stat devstat, mntdevstat;
 581         char device[sizeof(_PATH_DEV) - 1 + MNAMELEN];
 582         char *ddevname;
 583         struct statfs *mntbuf, *statfsp;
 584         int i, mntsize, isdev;
 585
 586         if (stat(name, &devstat) != 0)
 587                 return (NULL);
 588         if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))
 589                 isdev = 1;
 590         else
 591                 isdev = 0;
 592         mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
 593         for (i = 0; i < mntsize; i++) {
 594                 statfsp = &mntbuf[i];
 595                 ddevname = statfsp->f_mntfromname;
 596                 if (*ddevname != '/') {
 597                         strcpy(device, _PATH_DEV);
 598                         strcat(device, ddevname);
 599                         strcpy(statfsp->f_mntfromname, device);
 600                 }
 601                 if (isdev == 0) {
 602                         if (strcmp(name, statfsp->f_mntonname))
 603                                 continue;
 604                         return (statfsp);
 605                 }
 606                 if (stat(ddevname, &mntdevstat) == 0 &&
 607                     mntdevstat.st_rdev == devstat.st_rdev)
 608                         return (statfsp);
 609         }
 610         statfsp = NULL;
 611         return (statfsp);
 612 }
 613
 614 static void
 615 usage(void)
 616 {
 617         (void) fprintf(stderr,
 618             "usage: %s [-BCFpfny] [-b block] [-c level] [-m mode] "
 619                         "filesystem ...\n",
 620             getprogname());
 621         exit(1);
 622 }