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