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 iovlen; 235 int cylno; 236 intmax_t blks, files; 237 size_t size; 238 239 iov = NULL; 240 iovlen = 0; 241 errmsg[0] = '\0'; 242 fsutilinit(); 243 fsckinit(); 244 245 cdevname = filesys; 246 if (debug && ckclean) 247 pwarn("starting\n"); 248 /* 249 * Make best effort to get the disk name. Check first to see 250 * if it is listed among the mounted file systems. Failing that 251 * check to see if it is listed in /etc/fstab. 252 */ 253 mntp = getmntpt(filesys); 254 if (mntp != NULL) 255 filesys = mntp->f_mntfromname; 256 else 257 filesys = blockcheck(filesys); 258 /* 259 * If -F flag specified, check to see whether a background check 260 * is possible and needed. If possible and needed, exit with 261 * status zero. Otherwise exit with status non-zero. A non-zero 262 * exit status will cause a foreground check to be run. 263 */ 264 sblock_init(); 265 if (bkgrdcheck) { 266 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 267 exit(3); /* Cannot read superblock */ 268 close(fsreadfd); 269 /* Earlier background failed or journaled */ 270 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) 271 exit(4); 272 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 273 exit(5); /* Not running soft updates */ 274 size = MIBSIZE; 275 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 276 exit(6); /* Lacks kernel support */ 277 if ((mntp == NULL && sblock.fs_clean == 1) || 278 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 279 exit(7); /* Filesystem clean, report it now */ 280 exit(0); 281 } 282 if (ckclean && skipclean) { 283 /* 284 * If file system is gjournaled, check it here. 285 */ 286 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 287 exit(3); /* Cannot read superblock */ 288 close(fsreadfd); 289 if ((sblock.fs_flags & FS_GJOURNAL) != 0) { 290 //printf("GJournaled file system detected on %s.\n", 291 // filesys); 292 if (sblock.fs_clean == 1) { 293 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 294 exit(0); 295 } 296 if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) { 297 gjournal_check(filesys); 298 if (chkdoreload(mntp) == 0) 299 exit(0); 300 exit(4); 301 } else { 302 pfatal( 303 "UNEXPECTED INCONSISTENCY, CANNOT RUN FAST FSCK\n"); 304 } 305 } 306 } 307 /* 308 * If we are to do a background check: 309 * Get the mount point information of the file system 310 * create snapshot file 311 * return created snapshot file 312 * if not found, clear bkgrdflag and proceed with normal fsck 313 */ 314 if (bkgrdflag) { 315 if (mntp == NULL) { 316 bkgrdflag = 0; 317 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 318 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 319 bkgrdflag = 0; 320 pfatal( 321 "NOT USING SOFT UPDATES, CANNOT RUN IN BACKGROUND\n"); 322 } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 323 bkgrdflag = 0; 324 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 325 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 326 if (readsb(0) != 0) { 327 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) { 328 bkgrdflag = 0; 329 pfatal( 330 "UNEXPECTED INCONSISTENCY, CANNOT RUN IN BACKGROUND\n"); 331 } 332 if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 333 skipclean && ckclean) { 334 /* 335 * file system is clean; 336 * skip snapshot and report it clean 337 */ 338 pwarn( 339 "FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 340 goto clean; 341 } 342 } 343 close(fsreadfd); 344 } 345 if (bkgrdflag) { 346 snprintf(snapname, sizeof snapname, "%s/.snap", 347 mntp->f_mntonname); 348 if (stat(snapname, &snapdir) < 0) { 349 if (errno != ENOENT) { 350 bkgrdflag = 0; 351 pfatal( 352 "CANNOT FIND SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n", 353 snapname, strerror(errno)); 354 } else if ((grp = getgrnam("operator")) == NULL || 355 mkdir(snapname, 0770) < 0 || 356 chown(snapname, -1, grp->gr_gid) < 0 || 357 chmod(snapname, 0770) < 0) { 358 bkgrdflag = 0; 359 pfatal( 360 "CANNOT CREATE SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n", 361 snapname, strerror(errno)); 362 } 363 } else if (!S_ISDIR(snapdir.st_mode)) { 364 bkgrdflag = 0; 365 pfatal( 366 "%s IS NOT A DIRECTORY, CANNOT RUN IN BACKGROUND\n", 367 snapname); 368 } 369 } 370 if (bkgrdflag) { 371 snprintf(snapname, sizeof snapname, 372 "%s/.snap/fsck_snapshot", mntp->f_mntonname); 373 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 374 build_iovec(&iov, &iovlen, "from", snapname, 375 (size_t)-1); 376 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 377 (size_t)-1); 378 build_iovec(&iov, &iovlen, "errmsg", errmsg, 379 sizeof(errmsg)); 380 build_iovec(&iov, &iovlen, "update", NULL, 0); 381 build_iovec(&iov, &iovlen, "snapshot", NULL, 0); 382 383 while (nmount(iov, iovlen, mntp->f_flags) < 0) { 384 if (errno == EEXIST && unlink(snapname) == 0) 385 continue; 386 bkgrdflag = 0; 387 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n", 388 snapname, strerror(errno), errmsg); 389 break; 390 } 391 if (bkgrdflag != 0) 392 filesys = snapname; 393 } 394 } 395 396 switch (setup(filesys)) { 397 case 0: 398 if (preen) 399 pfatal("CAN'T CHECK FILE SYSTEM."); 400 return (0); 401 case -1: 402 clean: 403 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 404 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 405 printf("(%jd frags, %jd blocks, %.1f%% fragmentation)\n", 406 (intmax_t)sblock.fs_cstotal.cs_nffree, 407 (intmax_t)sblock.fs_cstotal.cs_nbfree, 408 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 409 return (0); 410 } 411 /* 412 * Determine if we can and should do journal recovery. 413 */ 414 if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) { 415 if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK && skipclean) { 416 if (preen || reply("USE JOURNAL")) { 417 if (suj_check(filesys) == 0) { 418 printf("\n***** FILE SYSTEM MARKED CLEAN *****\n"); 419 if (chkdoreload(mntp) == 0) 420 exit(0); 421 exit(4); 422 } 423 } 424 printf("** Skipping journal, falling through to full fsck\n\n"); 425 } 426 /* 427 * Write the superblock so we don't try to recover the 428 * journal on another pass. 429 */ 430 sblock.fs_mtime = time(NULL); 431 sbdirty(); 432 } 433 434 /* 435 * Cleared if any questions answered no. Used to decide if 436 * the superblock should be marked clean. 437 */ 438 resolved = 1; 439 /* 440 * 1: scan inodes tallying blocks used 441 */ 442 if (preen == 0) { 443 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 444 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 445 printf("** Root file system\n"); 446 printf("** Phase 1 - Check Blocks and Sizes\n"); 447 } 448 clock_gettime(CLOCK_REALTIME_PRECISE, &startprog); 449 pass1(); 450 IOstats("Pass1"); 451 452 /* 453 * 1b: locate first references to duplicates, if any 454 */ 455 if (duplist) { 456 if (preen || usedsoftdep) 457 pfatal("INTERNAL ERROR: dups with %s%s%s", 458 preen ? "-p" : "", 459 (preen && usedsoftdep) ? " and " : "", 460 usedsoftdep ? "softupdates" : ""); 461 printf("** Phase 1b - Rescan For More DUPS\n"); 462 pass1b(); 463 IOstats("Pass1b"); 464 } 465 466 /* 467 * 2: traverse directories from root to mark all connected directories 468 */ 469 if (preen == 0) 470 printf("** Phase 2 - Check Pathnames\n"); 471 pass2(); 472 IOstats("Pass2"); 473 474 /* 475 * 3: scan inodes looking for disconnected directories 476 */ 477 if (preen == 0) 478 printf("** Phase 3 - Check Connectivity\n"); 479 pass3(); 480 IOstats("Pass3"); 481 482 /* 483 * 4: scan inodes looking for disconnected files; check reference counts 484 */ 485 if (preen == 0) 486 printf("** Phase 4 - Check Reference Counts\n"); 487 pass4(); 488 IOstats("Pass4"); 489 490 /* 491 * 5: check and repair resource counts in cylinder groups 492 */ 493 if (preen == 0) 494 printf("** Phase 5 - Check Cyl groups\n"); 495 pass5(); 496 IOstats("Pass5"); 497 498 /* 499 * print out summary statistics 500 */ 501 n_ffree = sblock.fs_cstotal.cs_nffree; 502 n_bfree = sblock.fs_cstotal.cs_nbfree; 503 files = maxino - UFS_ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 504 blks = n_blks + 505 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 506 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 507 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 508 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 509 if (bkgrdflag && (files > 0 || blks > 0)) { 510 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 511 pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n", 512 countdirs, files - countdirs, blks); 513 } 514 pwarn("%ld files, %jd used, %ju free ", 515 (long)n_files, (intmax_t)n_blks, 516 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 517 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 518 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 519 n_ffree * 100.0 / sblock.fs_dsize); 520 if (debug) { 521 if (files < 0) 522 printf("%jd inodes missing\n", -files); 523 if (blks < 0) 524 printf("%jd blocks missing\n", -blks); 525 if (duplist != NULL) { 526 printf("The following duplicate blocks remain:"); 527 for (dp = duplist; dp; dp = dp->next) 528 printf(" %jd,", (intmax_t)dp->dup); 529 printf("\n"); 530 } 531 } 532 duplist = (struct dups *)0; 533 muldup = (struct dups *)0; 534 inocleanup(); 535 if (fsmodified) { 536 sblock.fs_time = time(NULL); 537 sbdirty(); 538 } 539 if (cvtlevel && sblk.b_dirty) { 540 /* 541 * Write out the duplicate super blocks 542 */ 543 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 544 blwrite(fswritefd, (char *)&sblock, 545 fsbtodb(&sblock, cgsblock(&sblock, cylno)), 546 SBLOCKSIZE); 547 } 548 if (rerun) 549 resolved = 0; 550 finalIOstats(); 551 552 /* 553 * Check to see if the file system is mounted read-write. 554 */ 555 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 556 resolved = 0; 557 ckfini(resolved); 558 559 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 560 if (inostathead[cylno].il_stat != NULL) 561 free((char *)inostathead[cylno].il_stat); 562 free((char *)inostathead); 563 inostathead = NULL; 564 if (fsmodified && !preen) 565 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 566 if (rerun) { 567 if (wantrestart && (restarts++ < 10) && 568 (preen || reply("RESTART"))) 569 return (ERESTART); 570 printf("\n***** PLEASE RERUN FSCK *****\n"); 571 } 572 if (chkdoreload(mntp) != 0) { 573 if (!fsmodified) 574 return (0); 575 if (!preen) 576 printf("\n***** REBOOT NOW *****\n"); 577 sync(); 578 return (4); 579 } 580 return (0); 581 } 582 583 static int 584 chkdoreload(struct statfs *mntp) 585 { 586 struct iovec *iov; 587 int iovlen; 588 char errmsg[255]; 589 590 if (mntp == NULL) 591 return (0); 592 593 iov = NULL; 594 iovlen = 0; 595 errmsg[0] = '\0'; 596 /* 597 * We modified a mounted file system. Do a mount update on 598 * it unless it is read-write, so we can continue using it 599 * as safely as possible. 600 */ 601 if (mntp->f_flags & MNT_RDONLY) { 602 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 603 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname, 604 (size_t)-1); 605 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 606 (size_t)-1); 607 build_iovec(&iov, &iovlen, "errmsg", errmsg, 608 sizeof(errmsg)); 609 build_iovec(&iov, &iovlen, "update", NULL, 0); 610 build_iovec(&iov, &iovlen, "reload", NULL, 0); 611 /* 612 * XX: We need the following line until we clean up 613 * nmount parsing of root mounts and NFS root mounts. 614 */ 615 build_iovec(&iov, &iovlen, "ro", NULL, 0); 616 if (nmount(iov, iovlen, mntp->f_flags) == 0) { 617 return (0); 618 } 619 pwarn("mount reload of '%s' failed: %s %s\n\n", 620 mntp->f_mntonname, strerror(errno), errmsg); 621 return (1); 622 } 623 return (0); 624 } 625 626 /* 627 * Get the mount point information for name. 628 */ 629 static struct statfs * 630 getmntpt(const char *name) 631 { 632 struct stat devstat, mntdevstat; 633 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 634 char *ddevname; 635 struct statfs *mntbuf, *statfsp; 636 int i, mntsize, isdev; 637 638 if (stat(name, &devstat) != 0) 639 return (NULL); 640 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 641 isdev = 1; 642 else 643 isdev = 0; 644 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 645 for (i = 0; i < mntsize; i++) { 646 statfsp = &mntbuf[i]; 647 ddevname = statfsp->f_mntfromname; 648 if (*ddevname != '/') { 649 if (strlen(_PATH_DEV) + strlen(ddevname) + 1 > 650 sizeof(statfsp->f_mntfromname)) 651 continue; 652 strcpy(device, _PATH_DEV); 653 strcat(device, ddevname); 654 strcpy(statfsp->f_mntfromname, device); 655 } 656 if (isdev == 0) { 657 if (strcmp(name, statfsp->f_mntonname)) 658 continue; 659 return (statfsp); 660 } 661 if (stat(ddevname, &mntdevstat) == 0 && 662 mntdevstat.st_rdev == devstat.st_rdev) 663 return (statfsp); 664 } 665 statfsp = NULL; 666 return (statfsp); 667 } 668 669 static void 670 usage(void) 671 { 672 (void) fprintf(stderr, 673 "usage: %s [-BCdEFfnpRrSyZ] [-b block] [-c level] [-m mode] filesystem ...\n", 674 getprogname()); 675 exit(1); 676 } 677 678 void 679 infohandler(int sig __unused) 680 { 681 got_siginfo = 1; 682 } 683 684 void 685 alarmhandler(int sig __unused) 686 { 687 got_sigalarm = 1; 688 } 689