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