1 /*- 2 * Copyright (c) 2002 Poul-Henning Kamp 3 * Copyright (c) 2002 Networks Associates Technology, Inc. 4 * All rights reserved. 5 * 6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp 7 * and NAI Labs, the Security Research Division of Network Associates, Inc. 8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 9 * DARPA CHATS research program. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. The names of the authors may not be used to endorse or promote 20 * products derived from this software without specific prior written 21 * permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * Copyright (c) 1986, 1992, 1993 36 * The Regents of the University of California. All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 4. Neither the name of the University nor the names of its contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 */ 62 63 #include <sys/cdefs.h> 64 __FBSDID("$FreeBSD$"); 65 66 #include <sys/param.h> 67 #include <sys/disk.h> 68 #include <sys/kerneldump.h> 69 #include <sys/mount.h> 70 #include <sys/stat.h> 71 #include <errno.h> 72 #include <fcntl.h> 73 #include <fstab.h> 74 #include <paths.h> 75 #include <stdarg.h> 76 #include <stdio.h> 77 #include <stdlib.h> 78 #include <string.h> 79 #include <syslog.h> 80 #include <time.h> 81 #include <unistd.h> 82 83 /* The size of the buffer used for I/O. */ 84 #define BUFFERSIZE (1024*1024) 85 86 #define STATUS_BAD 0 87 #define STATUS_GOOD 1 88 #define STATUS_UNKNOWN 2 89 90 static int checkfor, compress, clear, force, keep, verbose; /* flags */ 91 static int nfound, nsaved, nerr; /* statistics */ 92 93 extern FILE *zopen(const char *, const char *); 94 95 static sig_atomic_t got_siginfo; 96 static void infohandler(int); 97 98 static void 99 printheader(FILE *f, const struct kerneldumpheader *h, const char *device, 100 int bounds, const int status) 101 { 102 uint64_t dumplen; 103 time_t t; 104 const char *stat_str; 105 106 fprintf(f, "Dump header from device %s\n", device); 107 fprintf(f, " Architecture: %s\n", h->architecture); 108 fprintf(f, " Architecture Version: %u\n", 109 dtoh32(h->architectureversion)); 110 dumplen = dtoh64(h->dumplength); 111 fprintf(f, " Dump Length: %lldB (%lld MB)\n", (long long)dumplen, 112 (long long)(dumplen >> 20)); 113 fprintf(f, " Blocksize: %d\n", dtoh32(h->blocksize)); 114 t = dtoh64(h->dumptime); 115 fprintf(f, " Dumptime: %s", ctime(&t)); 116 fprintf(f, " Hostname: %s\n", h->hostname); 117 fprintf(f, " Magic: %s\n", h->magic); 118 fprintf(f, " Version String: %s", h->versionstring); 119 fprintf(f, " Panic String: %s\n", h->panicstring); 120 fprintf(f, " Dump Parity: %u\n", h->parity); 121 fprintf(f, " Bounds: %d\n", bounds); 122 123 switch(status) { 124 case STATUS_BAD: 125 stat_str = "bad"; 126 break; 127 case STATUS_GOOD: 128 stat_str = "good"; 129 break; 130 default: 131 stat_str = "unknown"; 132 } 133 fprintf(f, " Dump Status: %s\n", stat_str); 134 fflush(f); 135 } 136 137 static int 138 getbounds(void) { 139 FILE *fp; 140 char buf[6]; 141 int ret; 142 143 ret = 0; 144 145 if ((fp = fopen("bounds", "r")) == NULL) { 146 if (verbose) 147 printf("unable to open bounds file, using 0\n"); 148 return (ret); 149 } 150 151 if (fgets(buf, sizeof buf, fp) == NULL) { 152 syslog(LOG_WARNING, "unable to read from bounds, using 0"); 153 fclose(fp); 154 return (ret); 155 } 156 157 errno = 0; 158 ret = (int)strtol(buf, NULL, 10); 159 if (ret == 0 && (errno == EINVAL || errno == ERANGE)) 160 syslog(LOG_WARNING, "invalid value found in bounds, using 0"); 161 return (ret); 162 } 163 164 static void 165 writebounds(int bounds) { 166 FILE *fp; 167 168 if ((fp = fopen("bounds", "w")) == NULL) { 169 syslog(LOG_WARNING, "unable to write to bounds file: %m"); 170 return; 171 } 172 173 if (verbose) 174 printf("bounds number: %d\n", bounds); 175 176 fprintf(fp, "%d\n", bounds); 177 fclose(fp); 178 } 179 180 /* 181 * Check that sufficient space is available on the disk that holds the 182 * save directory. 183 */ 184 static int 185 check_space(const char *savedir, off_t dumpsize) 186 { 187 FILE *fp; 188 off_t minfree, spacefree, totfree, needed; 189 struct statfs fsbuf; 190 char buf[100], path[MAXPATHLEN]; 191 192 if (statfs(savedir, &fsbuf) < 0) { 193 syslog(LOG_ERR, "%s: %m", savedir); 194 exit(1); 195 } 196 spacefree = ((off_t) fsbuf.f_bavail * fsbuf.f_bsize) / 1024; 197 totfree = ((off_t) fsbuf.f_bfree * fsbuf.f_bsize) / 1024; 198 199 (void)snprintf(path, sizeof(path), "%s/minfree", savedir); 200 if ((fp = fopen(path, "r")) == NULL) 201 minfree = 0; 202 else { 203 if (fgets(buf, sizeof(buf), fp) == NULL) 204 minfree = 0; 205 else 206 minfree = atoi(buf); 207 (void)fclose(fp); 208 } 209 210 needed = dumpsize / 1024 + 2; /* 2 for info file */ 211 if (((minfree > 0) ? spacefree : totfree) - needed < minfree) { 212 syslog(LOG_WARNING, 213 "no dump, not enough free space on device (%lld available, need %lld)", 214 (long long)(minfree > 0 ? spacefree : totfree), 215 (long long)needed); 216 return (0); 217 } 218 if (spacefree - needed < 0) 219 syslog(LOG_WARNING, 220 "dump performed, but free space threshold crossed"); 221 return (1); 222 } 223 224 #define BLOCKSIZE (1<<12) 225 #define BLOCKMASK (~(BLOCKSIZE-1)) 226 227 static int 228 DoRegularFile(int fd, off_t dumpsize, char *buf, const char *device, 229 const char *filename, FILE *fp) 230 { 231 int he, hs, nr, nw, wl; 232 off_t dmpcnt, origsize; 233 234 dmpcnt = 0; 235 origsize = dumpsize; 236 he = 0; 237 while (dumpsize > 0) { 238 wl = BUFFERSIZE; 239 if (wl > dumpsize) 240 wl = dumpsize; 241 nr = read(fd, buf, wl); 242 if (nr != wl) { 243 if (nr == 0) 244 syslog(LOG_WARNING, 245 "WARNING: EOF on dump device"); 246 else 247 syslog(LOG_ERR, "read error on %s: %m", device); 248 nerr++; 249 return (-1); 250 } 251 if (compress) { 252 nw = fwrite(buf, 1, wl, fp); 253 } else { 254 for (nw = 0; nw < nr; nw = he) { 255 /* find a contiguous block of zeroes */ 256 for (hs = nw; hs < nr; hs += BLOCKSIZE) { 257 for (he = hs; he < nr && buf[he] == 0; 258 ++he) 259 /* nothing */ ; 260 /* is the hole long enough to matter? */ 261 if (he >= hs + BLOCKSIZE) 262 break; 263 } 264 265 /* back down to a block boundary */ 266 he &= BLOCKMASK; 267 268 /* 269 * 1) Don't go beyond the end of the buffer. 270 * 2) If the end of the buffer is less than 271 * BLOCKSIZE bytes away, we're at the end 272 * of the file, so just grab what's left. 273 */ 274 if (hs + BLOCKSIZE > nr) 275 hs = he = nr; 276 277 /* 278 * At this point, we have a partial ordering: 279 * nw <= hs <= he <= nr 280 * If hs > nw, buf[nw..hs] contains non-zero data. 281 * If he > hs, buf[hs..he] is all zeroes. 282 */ 283 if (hs > nw) 284 if (fwrite(buf + nw, hs - nw, 1, fp) 285 != 1) 286 break; 287 if (he > hs) 288 if (fseeko(fp, he - hs, SEEK_CUR) == -1) 289 break; 290 } 291 } 292 if (nw != wl) { 293 syslog(LOG_ERR, 294 "write error on %s file: %m", filename); 295 syslog(LOG_WARNING, 296 "WARNING: vmcore may be incomplete"); 297 nerr++; 298 return (-1); 299 } 300 if (verbose) { 301 dmpcnt += wl; 302 printf("%llu\r", (unsigned long long)dmpcnt); 303 fflush(stdout); 304 } 305 dumpsize -= wl; 306 if (got_siginfo) { 307 printf("%s %.1lf%%\n", filename, (100.0 - (100.0 * 308 (double)dumpsize / (double)origsize))); 309 got_siginfo = 0; 310 } 311 } 312 return (0); 313 } 314 315 /* 316 * Specialized version of dump-reading logic for use with textdumps, which 317 * are written backwards from the end of the partition, and must be reversed 318 * before being written to the file. Textdumps are small, so do a bit less 319 * work to optimize/sparsify. 320 */ 321 static int 322 DoTextdumpFile(int fd, off_t dumpsize, off_t lasthd, char *buf, 323 const char *device, const char *filename, FILE *fp) 324 { 325 int nr, nw, wl; 326 off_t dmpcnt, totsize; 327 328 totsize = dumpsize; 329 dmpcnt = 0; 330 wl = 512; 331 if ((dumpsize % wl) != 0) { 332 syslog(LOG_ERR, "textdump uneven multiple of 512 on %s", 333 device); 334 nerr++; 335 return (-1); 336 } 337 while (dumpsize > 0) { 338 nr = pread(fd, buf, wl, lasthd - (totsize - dumpsize) - wl); 339 if (nr != wl) { 340 if (nr == 0) 341 syslog(LOG_WARNING, 342 "WARNING: EOF on dump device"); 343 else 344 syslog(LOG_ERR, "read error on %s: %m", device); 345 nerr++; 346 return (-1); 347 } 348 nw = fwrite(buf, 1, wl, fp); 349 if (nw != wl) { 350 syslog(LOG_ERR, 351 "write error on %s file: %m", filename); 352 syslog(LOG_WARNING, 353 "WARNING: textdump may be incomplete"); 354 nerr++; 355 return (-1); 356 } 357 if (verbose) { 358 dmpcnt += wl; 359 printf("%llu\r", (unsigned long long)dmpcnt); 360 fflush(stdout); 361 } 362 dumpsize -= wl; 363 } 364 return (0); 365 } 366 367 static void 368 DoFile(const char *savedir, const char *device) 369 { 370 static char filename[PATH_MAX]; 371 static char *buf = NULL; 372 struct kerneldumpheader kdhf, kdhl; 373 off_t mediasize, dumpsize, firsthd, lasthd; 374 FILE *info, *fp; 375 mode_t oumask; 376 int fd, fdinfo, error; 377 int bounds, status; 378 u_int sectorsize; 379 int istextdump; 380 381 bounds = getbounds(); 382 mediasize = 0; 383 status = STATUS_UNKNOWN; 384 385 if (buf == NULL) { 386 buf = malloc(BUFFERSIZE); 387 if (buf == NULL) { 388 syslog(LOG_ERR, "%m"); 389 return; 390 } 391 } 392 393 if (verbose) 394 printf("checking for kernel dump on device %s\n", device); 395 396 fd = open(device, O_RDWR); 397 if (fd < 0) { 398 syslog(LOG_ERR, "%s: %m", device); 399 return; 400 } 401 402 error = ioctl(fd, DIOCGMEDIASIZE, &mediasize); 403 if (!error) 404 error = ioctl(fd, DIOCGSECTORSIZE, §orsize); 405 if (error) { 406 syslog(LOG_ERR, 407 "couldn't find media and/or sector size of %s: %m", device); 408 goto closefd; 409 } 410 411 if (verbose) { 412 printf("mediasize = %lld\n", (long long)mediasize); 413 printf("sectorsize = %u\n", sectorsize); 414 } 415 416 lasthd = mediasize - sectorsize; 417 lseek(fd, lasthd, SEEK_SET); 418 error = read(fd, &kdhl, sizeof kdhl); 419 if (error != sizeof kdhl) { 420 syslog(LOG_ERR, 421 "error reading last dump header at offset %lld in %s: %m", 422 (long long)lasthd, device); 423 goto closefd; 424 } 425 istextdump = 0; 426 if (strncmp(kdhl.magic, TEXTDUMPMAGIC, sizeof kdhl) == 0) { 427 if (verbose) 428 printf("textdump magic on last dump header on %s\n", 429 device); 430 istextdump = 1; 431 if (dtoh32(kdhl.version) != KERNELDUMP_TEXT_VERSION) { 432 syslog(LOG_ERR, 433 "unknown version (%d) in last dump header on %s", 434 dtoh32(kdhl.version), device); 435 436 status = STATUS_BAD; 437 if (force == 0) 438 goto closefd; 439 } 440 } else if (memcmp(kdhl.magic, KERNELDUMPMAGIC, sizeof kdhl.magic) == 441 0) { 442 if (dtoh32(kdhl.version) != KERNELDUMPVERSION) { 443 syslog(LOG_ERR, 444 "unknown version (%d) in last dump header on %s", 445 dtoh32(kdhl.version), device); 446 447 status = STATUS_BAD; 448 if (force == 0) 449 goto closefd; 450 } 451 } else { 452 if (verbose) 453 printf("magic mismatch on last dump header on %s\n", 454 device); 455 456 status = STATUS_BAD; 457 if (force == 0) 458 goto closefd; 459 460 if (memcmp(kdhl.magic, KERNELDUMPMAGIC_CLEARED, 461 sizeof kdhl.magic) == 0) { 462 if (verbose) 463 printf("forcing magic on %s\n", device); 464 memcpy(kdhl.magic, KERNELDUMPMAGIC, 465 sizeof kdhl.magic); 466 } else { 467 syslog(LOG_ERR, "unable to force dump - bad magic"); 468 goto closefd; 469 } 470 if (dtoh32(kdhl.version) != KERNELDUMPVERSION) { 471 syslog(LOG_ERR, 472 "unknown version (%d) in last dump header on %s", 473 dtoh32(kdhl.version), device); 474 475 status = STATUS_BAD; 476 if (force == 0) 477 goto closefd; 478 } 479 } 480 481 nfound++; 482 if (clear) 483 goto nuke; 484 485 if (kerneldump_parity(&kdhl)) { 486 syslog(LOG_ERR, 487 "parity error on last dump header on %s", device); 488 nerr++; 489 status = STATUS_BAD; 490 if (force == 0) 491 goto closefd; 492 } 493 dumpsize = dtoh64(kdhl.dumplength); 494 firsthd = lasthd - dumpsize - sizeof kdhf; 495 lseek(fd, firsthd, SEEK_SET); 496 error = read(fd, &kdhf, sizeof kdhf); 497 if (error != sizeof kdhf) { 498 syslog(LOG_ERR, 499 "error reading first dump header at offset %lld in %s: %m", 500 (long long)firsthd, device); 501 nerr++; 502 goto closefd; 503 } 504 505 if (verbose >= 2) { 506 printf("First dump headers:\n"); 507 printheader(stdout, &kdhf, device, bounds, -1); 508 509 printf("\nLast dump headers:\n"); 510 printheader(stdout, &kdhl, device, bounds, -1); 511 printf("\n"); 512 } 513 514 if (memcmp(&kdhl, &kdhf, sizeof kdhl)) { 515 syslog(LOG_ERR, 516 "first and last dump headers disagree on %s", device); 517 nerr++; 518 status = STATUS_BAD; 519 if (force == 0) 520 goto closefd; 521 } else { 522 status = STATUS_GOOD; 523 } 524 525 if (checkfor) { 526 printf("A dump exists on %s\n", device); 527 close(fd); 528 exit(0); 529 } 530 531 if (kdhl.panicstring[0]) 532 syslog(LOG_ALERT, "reboot after panic: %s", kdhl.panicstring); 533 else 534 syslog(LOG_ALERT, "reboot"); 535 536 if (verbose) 537 printf("Checking for available free space\n"); 538 if (!check_space(savedir, dumpsize)) { 539 nerr++; 540 goto closefd; 541 } 542 543 writebounds(bounds + 1); 544 545 sprintf(buf, "info.%d", bounds); 546 547 /* 548 * Create or overwrite any existing dump header files. 549 */ 550 fdinfo = open(buf, O_WRONLY | O_CREAT | O_TRUNC, 0600); 551 if (fdinfo < 0) { 552 syslog(LOG_ERR, "%s: %m", buf); 553 nerr++; 554 goto closefd; 555 } 556 oumask = umask(S_IRWXG|S_IRWXO); /* Restrict access to the core file.*/ 557 if (compress) { 558 sprintf(filename, "%s.%d.gz", istextdump ? "textdump.tar" : 559 "vmcore", bounds); 560 fp = zopen(filename, "w"); 561 } else { 562 sprintf(filename, "%s.%d", istextdump ? "textdump.tar" : 563 "vmcore", bounds); 564 fp = fopen(filename, "w"); 565 } 566 if (fp == NULL) { 567 syslog(LOG_ERR, "%s: %m", filename); 568 close(fdinfo); 569 nerr++; 570 goto closefd; 571 } 572 (void)umask(oumask); 573 574 info = fdopen(fdinfo, "w"); 575 576 if (info == NULL) { 577 syslog(LOG_ERR, "fdopen failed: %m"); 578 nerr++; 579 goto closefd; 580 } 581 582 if (verbose) 583 printheader(stdout, &kdhl, device, bounds, status); 584 585 printheader(info, &kdhl, device, bounds, status); 586 fclose(info); 587 588 syslog(LOG_NOTICE, "writing %score to %s", 589 compress ? "compressed " : "", filename); 590 591 if (istextdump) { 592 if (DoTextdumpFile(fd, dumpsize, lasthd, buf, device, 593 filename, fp) < 0) 594 goto closeall; 595 } else { 596 if (DoRegularFile(fd, dumpsize, buf, device, filename, fp) 597 < 0) 598 goto closeall; 599 } 600 if (verbose) 601 printf("\n"); 602 603 if (fclose(fp) < 0) { 604 syslog(LOG_ERR, "error on %s: %m", filename); 605 nerr++; 606 goto closeall; 607 } 608 nsaved++; 609 610 if (verbose) 611 printf("dump saved\n"); 612 613 nuke: 614 if (clear || !keep) { 615 if (verbose) 616 printf("clearing dump header\n"); 617 memcpy(kdhl.magic, KERNELDUMPMAGIC_CLEARED, sizeof kdhl.magic); 618 lseek(fd, lasthd, SEEK_SET); 619 error = write(fd, &kdhl, sizeof kdhl); 620 if (error != sizeof kdhl) 621 syslog(LOG_ERR, 622 "error while clearing the dump header: %m"); 623 } 624 close(fd); 625 return; 626 627 closeall: 628 fclose(fp); 629 630 closefd: 631 close(fd); 632 } 633 634 static void 635 usage(void) 636 { 637 fprintf(stderr, "%s\n%s\n%s\n", 638 "usage: savecore -c", 639 " savecore -C [-v] [directory device]", 640 " savecore [-fkvz] [directory [device ...]]"); 641 exit (1); 642 } 643 644 int 645 main(int argc, char **argv) 646 { 647 const char *savedir = "."; 648 struct fstab *fsp; 649 int i, ch, error; 650 651 checkfor = compress = clear = force = keep = verbose = 0; 652 nfound = nsaved = nerr = 0; 653 654 openlog("savecore", LOG_PERROR, LOG_DAEMON); 655 signal(SIGINFO, infohandler); 656 657 while ((ch = getopt(argc, argv, "Ccfkvz")) != -1) 658 switch(ch) { 659 case 'C': 660 checkfor = 1; 661 break; 662 case 'c': 663 clear = 1; 664 break; 665 case 'k': 666 keep = 1; 667 break; 668 case 'v': 669 verbose++; 670 break; 671 case 'f': 672 force = 1; 673 break; 674 case 'z': 675 compress = 1; 676 break; 677 case '?': 678 default: 679 usage(); 680 } 681 if (checkfor && (clear || force || keep)) 682 usage(); 683 argc -= optind; 684 argv += optind; 685 if (argc >= 1) { 686 error = chdir(argv[0]); 687 if (error) { 688 syslog(LOG_ERR, "chdir(%s): %m", argv[0]); 689 exit(1); 690 } 691 savedir = argv[0]; 692 argc--; 693 argv++; 694 } 695 if (argc == 0) { 696 for (;;) { 697 fsp = getfsent(); 698 if (fsp == NULL) 699 break; 700 if (strcmp(fsp->fs_vfstype, "swap") && 701 strcmp(fsp->fs_vfstype, "dump")) 702 continue; 703 DoFile(savedir, fsp->fs_spec); 704 } 705 } else { 706 for (i = 0; i < argc; i++) 707 DoFile(savedir, argv[i]); 708 } 709 710 /* Emit minimal output. */ 711 if (nfound == 0) { 712 if (checkfor) { 713 printf("No dump exists\n"); 714 exit(1); 715 } 716 syslog(LOG_WARNING, "no dumps found"); 717 } 718 else if (nsaved == 0) { 719 if (nerr != 0) 720 syslog(LOG_WARNING, "unsaved dumps found but not saved"); 721 else 722 syslog(LOG_WARNING, "no unsaved dumps found"); 723 } 724 725 return (0); 726 } 727 728 static void 729 infohandler(int sig __unused) 730 { 731 got_siginfo = 1; 732 } 733