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/param.h> 70 #include <sys/mount.h> 71 #include <sys/stat.h> 72 #include <errno.h> 73 #include <fcntl.h> 74 #include <fstab.h> 75 #include <paths.h> 76 #include <stdarg.h> 77 #include <stdio.h> 78 #include <stdlib.h> 79 #include <string.h> 80 #include <syslog.h> 81 #include <time.h> 82 #include <unistd.h> 83 84 /* The size of the buffer used for I/O. */ 85 #define BUFFERSIZE (1024*1024) 86 87 #define STATUS_BAD 0 88 #define STATUS_GOOD 1 89 #define STATUS_UNKNOWN 2 90 91 static int checkfor, compress, clear, force, keep, verbose; /* flags */ 92 static int nfound, nsaved, nerr; /* statistics */ 93 94 extern FILE *zopen(const char *, const char *); 95 96 static sig_atomic_t got_siginfo; 97 static void infohandler(int); 98 99 static void 100 printheader(FILE *f, const struct kerneldumpheader *h, const char *device, 101 int bounds, const int status) 102 { 103 uint64_t dumplen; 104 time_t t; 105 const char *stat_str; 106 107 fprintf(f, "Dump header from device %s\n", device); 108 fprintf(f, " Architecture: %s\n", h->architecture); 109 fprintf(f, " Architecture Version: %u\n", 110 dtoh32(h->architectureversion)); 111 dumplen = dtoh64(h->dumplength); 112 fprintf(f, " Dump Length: %lldB (%lld MB)\n", (long long)dumplen, 113 (long long)(dumplen >> 20)); 114 fprintf(f, " Blocksize: %d\n", dtoh32(h->blocksize)); 115 t = dtoh64(h->dumptime); 116 fprintf(f, " Dumptime: %s", ctime(&t)); 117 fprintf(f, " Hostname: %s\n", h->hostname); 118 fprintf(f, " Magic: %s\n", h->magic); 119 fprintf(f, " Version String: %s", h->versionstring); 120 fprintf(f, " Panic String: %s\n", h->panicstring); 121 fprintf(f, " Dump Parity: %u\n", h->parity); 122 fprintf(f, " Bounds: %d\n", bounds); 123 124 switch(status) { 125 case STATUS_BAD: 126 stat_str = "bad"; 127 break; 128 case STATUS_GOOD: 129 stat_str = "good"; 130 break; 131 default: 132 stat_str = "unknown"; 133 } 134 fprintf(f, " Dump Status: %s\n", stat_str); 135 fflush(f); 136 } 137 138 static int 139 getbounds(void) { 140 FILE *fp; 141 char buf[6]; 142 int ret; 143 144 ret = 0; 145 146 if ((fp = fopen("bounds", "r")) == NULL) { 147 if (verbose) 148 printf("unable to open bounds file, using 0\n"); 149 return (ret); 150 } 151 152 if (fgets(buf, sizeof buf, fp) == NULL) { 153 syslog(LOG_WARNING, "unable to read from bounds, using 0"); 154 fclose(fp); 155 return (ret); 156 } 157 158 errno = 0; 159 ret = (int)strtol(buf, NULL, 10); 160 if (ret == 0 && (errno == EINVAL || errno == ERANGE)) 161 syslog(LOG_WARNING, "invalid value found in bounds, using 0"); 162 return (ret); 163 } 164 165 static void 166 writebounds(int bounds) { 167 FILE *fp; 168 169 if ((fp = fopen("bounds", "w")) == NULL) { 170 syslog(LOG_WARNING, "unable to write to bounds file: %m"); 171 return; 172 } 173 174 if (verbose) 175 printf("bounds number: %d\n", bounds); 176 177 fprintf(fp, "%d\n", bounds); 178 fclose(fp); 179 } 180 181 /* 182 * Check that sufficient space is available on the disk that holds the 183 * save directory. 184 */ 185 static int 186 check_space(const char *savedir, off_t dumpsize) 187 { 188 FILE *fp; 189 off_t minfree, spacefree, totfree, needed; 190 struct statfs fsbuf; 191 char buf[100], path[MAXPATHLEN]; 192 193 if (statfs(savedir, &fsbuf) < 0) { 194 syslog(LOG_ERR, "%s: %m", savedir); 195 exit(1); 196 } 197 spacefree = ((off_t) fsbuf.f_bavail * fsbuf.f_bsize) / 1024; 198 totfree = ((off_t) fsbuf.f_bfree * fsbuf.f_bsize) / 1024; 199 200 (void)snprintf(path, sizeof(path), "%s/minfree", savedir); 201 if ((fp = fopen(path, "r")) == NULL) 202 minfree = 0; 203 else { 204 if (fgets(buf, sizeof(buf), fp) == NULL) 205 minfree = 0; 206 else 207 minfree = atoi(buf); 208 (void)fclose(fp); 209 } 210 211 needed = dumpsize / 1024 + 2; /* 2 for info file */ 212 if (((minfree > 0) ? spacefree : totfree) - needed < minfree) { 213 syslog(LOG_WARNING, 214 "no dump, not enough free space on device (%lld available, need %lld)", 215 (long long)(minfree > 0 ? spacefree : totfree), 216 (long long)needed); 217 return (0); 218 } 219 if (spacefree - needed < 0) 220 syslog(LOG_WARNING, 221 "dump performed, but free space threshold crossed"); 222 return (1); 223 } 224 225 #define BLOCKSIZE (1<<12) 226 #define BLOCKMASK (~(BLOCKSIZE-1)) 227 228 static int 229 DoRegularFile(int fd, off_t dumpsize, char *buf, const char *device, 230 const char *filename, FILE *fp) 231 { 232 int he, hs, nr, nw, wl; 233 off_t dmpcnt, origsize; 234 235 dmpcnt = 0; 236 origsize = dumpsize; 237 he = 0; 238 while (dumpsize > 0) { 239 wl = BUFFERSIZE; 240 if (wl > dumpsize) 241 wl = dumpsize; 242 nr = read(fd, buf, wl); 243 if (nr != wl) { 244 if (nr == 0) 245 syslog(LOG_WARNING, 246 "WARNING: EOF on dump device"); 247 else 248 syslog(LOG_ERR, "read error on %s: %m", device); 249 nerr++; 250 return (-1); 251 } 252 if (compress) { 253 nw = fwrite(buf, 1, wl, fp); 254 } else { 255 for (nw = 0; nw < nr; nw = he) { 256 /* find a contiguous block of zeroes */ 257 for (hs = nw; hs < nr; hs += BLOCKSIZE) { 258 for (he = hs; he < nr && buf[he] == 0; 259 ++he) 260 /* nothing */ ; 261 /* is the hole long enough to matter? */ 262 if (he >= hs + BLOCKSIZE) 263 break; 264 } 265 266 /* back down to a block boundary */ 267 he &= BLOCKMASK; 268 269 /* 270 * 1) Don't go beyond the end of the buffer. 271 * 2) If the end of the buffer is less than 272 * BLOCKSIZE bytes away, we're at the end 273 * of the file, so just grab what's left. 274 */ 275 if (hs + BLOCKSIZE > nr) 276 hs = he = nr; 277 278 /* 279 * At this point, we have a partial ordering: 280 * nw <= hs <= he <= nr 281 * If hs > nw, buf[nw..hs] contains non-zero data. 282 * If he > hs, buf[hs..he] is all zeroes. 283 */ 284 if (hs > nw) 285 if (fwrite(buf + nw, hs - nw, 1, fp) 286 != 1) 287 break; 288 if (he > hs) 289 if (fseeko(fp, he - hs, SEEK_CUR) == -1) 290 break; 291 } 292 } 293 if (nw != wl) { 294 syslog(LOG_ERR, 295 "write error on %s file: %m", filename); 296 syslog(LOG_WARNING, 297 "WARNING: vmcore may be incomplete"); 298 nerr++; 299 return (-1); 300 } 301 if (verbose) { 302 dmpcnt += wl; 303 printf("%llu\r", (unsigned long long)dmpcnt); 304 fflush(stdout); 305 } 306 dumpsize -= wl; 307 if (got_siginfo) { 308 printf("%s %.1lf%%\n", filename, (100.0 - (100.0 * 309 (double)dumpsize / (double)origsize))); 310 got_siginfo = 0; 311 } 312 } 313 return (0); 314 } 315 316 /* 317 * Specialized version of dump-reading logic for use with textdumps, which 318 * are written backwards from the end of the partition, and must be reversed 319 * before being written to the file. Textdumps are small, so do a bit less 320 * work to optimize/sparsify. 321 */ 322 static int 323 DoTextdumpFile(int fd, off_t dumpsize, off_t lasthd, char *buf, 324 const char *device, const char *filename, FILE *fp) 325 { 326 int nr, nw, wl; 327 off_t dmpcnt, totsize; 328 329 totsize = dumpsize; 330 dmpcnt = 0; 331 wl = 512; 332 if ((dumpsize % wl) != 0) { 333 syslog(LOG_ERR, "textdump uneven multiple of 512 on %s", 334 device); 335 nerr++; 336 return (-1); 337 } 338 while (dumpsize > 0) { 339 nr = pread(fd, buf, wl, lasthd - (totsize - dumpsize) - wl); 340 if (nr != wl) { 341 if (nr == 0) 342 syslog(LOG_WARNING, 343 "WARNING: EOF on dump device"); 344 else 345 syslog(LOG_ERR, "read error on %s: %m", device); 346 nerr++; 347 return (-1); 348 } 349 nw = fwrite(buf, 1, wl, fp); 350 if (nw != wl) { 351 syslog(LOG_ERR, 352 "write error on %s file: %m", filename); 353 syslog(LOG_WARNING, 354 "WARNING: textdump may be incomplete"); 355 nerr++; 356 return (-1); 357 } 358 if (verbose) { 359 dmpcnt += wl; 360 printf("%llu\r", (unsigned long long)dmpcnt); 361 fflush(stdout); 362 } 363 dumpsize -= wl; 364 } 365 return (0); 366 } 367 368 static void 369 DoFile(const char *savedir, const char *device) 370 { 371 static char filename[PATH_MAX]; 372 static char *buf = NULL; 373 struct kerneldumpheader kdhf, kdhl; 374 off_t mediasize, dumpsize, firsthd, lasthd; 375 FILE *info, *fp; 376 mode_t oumask; 377 int fd, fdinfo, error; 378 int bounds, status; 379 u_int sectorsize; 380 int istextdump; 381 382 bounds = getbounds(); 383 mediasize = 0; 384 status = STATUS_UNKNOWN; 385 386 if (buf == NULL) { 387 buf = malloc(BUFFERSIZE); 388 if (buf == NULL) { 389 syslog(LOG_ERR, "%m"); 390 return; 391 } 392 } 393 394 if (verbose) 395 printf("checking for kernel dump on device %s\n", device); 396 397 fd = open(device, O_RDWR); 398 if (fd < 0) { 399 syslog(LOG_ERR, "%s: %m", device); 400 return; 401 } 402 403 error = ioctl(fd, DIOCGMEDIASIZE, &mediasize); 404 if (!error) 405 error = ioctl(fd, DIOCGSECTORSIZE, §orsize); 406 if (error) { 407 syslog(LOG_ERR, 408 "couldn't find media and/or sector size of %s: %m", device); 409 goto closefd; 410 } 411 412 if (verbose) { 413 printf("mediasize = %lld\n", (long long)mediasize); 414 printf("sectorsize = %u\n", sectorsize); 415 } 416 417 lasthd = mediasize - sectorsize; 418 lseek(fd, lasthd, SEEK_SET); 419 error = read(fd, &kdhl, sizeof kdhl); 420 if (error != sizeof kdhl) { 421 syslog(LOG_ERR, 422 "error reading last dump header at offset %lld in %s: %m", 423 (long long)lasthd, device); 424 goto closefd; 425 } 426 istextdump = 0; 427 if (strncmp(kdhl.magic, TEXTDUMPMAGIC, sizeof kdhl) == 0) { 428 if (verbose) 429 printf("textdump magic on last dump header on %s\n", 430 device); 431 istextdump = 1; 432 if (dtoh32(kdhl.version) != KERNELDUMP_TEXT_VERSION) { 433 syslog(LOG_ERR, 434 "unknown version (%d) in last dump header on %s", 435 dtoh32(kdhl.version), device); 436 437 status = STATUS_BAD; 438 if (force == 0) 439 goto closefd; 440 } 441 } else if (memcmp(kdhl.magic, KERNELDUMPMAGIC, sizeof kdhl.magic) == 442 0) { 443 if (dtoh32(kdhl.version) != KERNELDUMPVERSION) { 444 syslog(LOG_ERR, 445 "unknown version (%d) in last dump header on %s", 446 dtoh32(kdhl.version), device); 447 448 status = STATUS_BAD; 449 if (force == 0) 450 goto closefd; 451 } 452 } else { 453 if (verbose) 454 printf("magic mismatch on last dump header on %s\n", 455 device); 456 457 status = STATUS_BAD; 458 if (force == 0) 459 goto closefd; 460 461 if (memcmp(kdhl.magic, KERNELDUMPMAGIC_CLEARED, 462 sizeof kdhl.magic) == 0) { 463 if (verbose) 464 printf("forcing magic on %s\n", device); 465 memcpy(kdhl.magic, KERNELDUMPMAGIC, 466 sizeof kdhl.magic); 467 } else { 468 syslog(LOG_ERR, "unable to force dump - bad magic"); 469 goto closefd; 470 } 471 if (dtoh32(kdhl.version) != KERNELDUMPVERSION) { 472 syslog(LOG_ERR, 473 "unknown version (%d) in last dump header on %s", 474 dtoh32(kdhl.version), device); 475 476 status = STATUS_BAD; 477 if (force == 0) 478 goto closefd; 479 } 480 } 481 482 nfound++; 483 if (clear) 484 goto nuke; 485 486 if (kerneldump_parity(&kdhl)) { 487 syslog(LOG_ERR, 488 "parity error on last dump header on %s", device); 489 nerr++; 490 status = STATUS_BAD; 491 if (force == 0) 492 goto closefd; 493 } 494 dumpsize = dtoh64(kdhl.dumplength); 495 firsthd = lasthd - dumpsize - sizeof kdhf; 496 lseek(fd, firsthd, SEEK_SET); 497 error = read(fd, &kdhf, sizeof kdhf); 498 if (error != sizeof kdhf) { 499 syslog(LOG_ERR, 500 "error reading first dump header at offset %lld in %s: %m", 501 (long long)firsthd, device); 502 nerr++; 503 goto closefd; 504 } 505 506 if (verbose >= 2) { 507 printf("First dump headers:\n"); 508 printheader(stdout, &kdhf, device, bounds, -1); 509 510 printf("\nLast dump headers:\n"); 511 printheader(stdout, &kdhl, device, bounds, -1); 512 printf("\n"); 513 } 514 515 if (memcmp(&kdhl, &kdhf, sizeof kdhl)) { 516 syslog(LOG_ERR, 517 "first and last dump headers disagree on %s", device); 518 nerr++; 519 status = STATUS_BAD; 520 if (force == 0) 521 goto closefd; 522 } else { 523 status = STATUS_GOOD; 524 } 525 526 if (checkfor) { 527 printf("A dump exists on %s\n", device); 528 close(fd); 529 exit(0); 530 } 531 532 if (kdhl.panicstring[0]) 533 syslog(LOG_ALERT, "reboot after panic: %s", kdhl.panicstring); 534 else 535 syslog(LOG_ALERT, "reboot"); 536 537 if (verbose) 538 printf("Checking for available free space\n"); 539 if (!check_space(savedir, dumpsize)) { 540 nerr++; 541 goto closefd; 542 } 543 544 writebounds(bounds + 1); 545 546 sprintf(buf, "info.%d", bounds); 547 548 /* 549 * Create or overwrite any existing dump header files. 550 */ 551 fdinfo = open(buf, O_WRONLY | O_CREAT | O_TRUNC, 0600); 552 if (fdinfo < 0) { 553 syslog(LOG_ERR, "%s: %m", buf); 554 nerr++; 555 goto closefd; 556 } 557 oumask = umask(S_IRWXG|S_IRWXO); /* Restrict access to the core file.*/ 558 if (compress) { 559 sprintf(filename, "%s.%d.gz", istextdump ? "textdump.tar" : 560 "vmcore", bounds); 561 fp = zopen(filename, "w"); 562 } else { 563 sprintf(filename, "%s.%d", istextdump ? "textdump.tar" : 564 "vmcore", bounds); 565 fp = fopen(filename, "w"); 566 } 567 if (fp == NULL) { 568 syslog(LOG_ERR, "%s: %m", filename); 569 close(fdinfo); 570 nerr++; 571 goto closefd; 572 } 573 (void)umask(oumask); 574 575 info = fdopen(fdinfo, "w"); 576 577 if (info == NULL) { 578 syslog(LOG_ERR, "fdopen failed: %m"); 579 nerr++; 580 goto closefd; 581 } 582 583 if (verbose) 584 printheader(stdout, &kdhl, device, bounds, status); 585 586 printheader(info, &kdhl, device, bounds, status); 587 fclose(info); 588 589 syslog(LOG_NOTICE, "writing %score to %s", 590 compress ? "compressed " : "", filename); 591 592 if (istextdump) { 593 if (DoTextdumpFile(fd, dumpsize, lasthd, buf, device, 594 filename, fp) < 0) 595 goto closeall; 596 } else { 597 if (DoRegularFile(fd, dumpsize, buf, device, filename, fp) 598 < 0) 599 goto closeall; 600 } 601 if (verbose) 602 printf("\n"); 603 604 if (fclose(fp) < 0) { 605 syslog(LOG_ERR, "error on %s: %m", filename); 606 nerr++; 607 goto closeall; 608 } 609 nsaved++; 610 611 if (verbose) 612 printf("dump saved\n"); 613 614 nuke: 615 if (clear || !keep) { 616 if (verbose) 617 printf("clearing dump header\n"); 618 memcpy(kdhl.magic, KERNELDUMPMAGIC_CLEARED, sizeof kdhl.magic); 619 lseek(fd, lasthd, SEEK_SET); 620 error = write(fd, &kdhl, sizeof kdhl); 621 if (error != sizeof kdhl) 622 syslog(LOG_ERR, 623 "error while clearing the dump header: %m"); 624 } 625 close(fd); 626 return; 627 628 closeall: 629 fclose(fp); 630 631 closefd: 632 close(fd); 633 } 634 635 static void 636 usage(void) 637 { 638 fprintf(stderr, "%s\n%s\n%s\n", 639 "usage: savecore -c", 640 " savecore -C [-v] [directory device]", 641 " savecore [-fkvz] [directory [device ...]]"); 642 exit (1); 643 } 644 645 int 646 main(int argc, char **argv) 647 { 648 const char *savedir = "."; 649 struct fstab *fsp; 650 int i, ch, error; 651 652 checkfor = compress = clear = force = keep = verbose = 0; 653 nfound = nsaved = nerr = 0; 654 655 openlog("savecore", LOG_PERROR, LOG_DAEMON); 656 signal(SIGINFO, infohandler); 657 658 while ((ch = getopt(argc, argv, "Ccfkvz")) != -1) 659 switch(ch) { 660 case 'C': 661 checkfor = 1; 662 break; 663 case 'c': 664 clear = 1; 665 break; 666 case 'k': 667 keep = 1; 668 break; 669 case 'v': 670 verbose++; 671 break; 672 case 'f': 673 force = 1; 674 break; 675 case 'z': 676 compress = 1; 677 break; 678 case '?': 679 default: 680 usage(); 681 } 682 if (checkfor && (clear || force || keep)) 683 usage(); 684 argc -= optind; 685 argv += optind; 686 if (argc >= 1) { 687 error = chdir(argv[0]); 688 if (error) { 689 syslog(LOG_ERR, "chdir(%s): %m", argv[0]); 690 exit(1); 691 } 692 savedir = argv[0]; 693 argc--; 694 argv++; 695 } 696 if (argc == 0) { 697 for (;;) { 698 fsp = getfsent(); 699 if (fsp == NULL) 700 break; 701 if (strcmp(fsp->fs_vfstype, "swap") && 702 strcmp(fsp->fs_vfstype, "dump")) 703 continue; 704 DoFile(savedir, fsp->fs_spec); 705 } 706 } else { 707 for (i = 0; i < argc; i++) 708 DoFile(savedir, argv[i]); 709 } 710 711 /* Emit minimal output. */ 712 if (nfound == 0) { 713 if (checkfor) { 714 printf("No dump exists\n"); 715 exit(1); 716 } 717 syslog(LOG_WARNING, "no dumps found"); 718 } 719 else if (nsaved == 0) { 720 if (nerr != 0) 721 syslog(LOG_WARNING, "unsaved dumps found but not saved"); 722 else 723 syslog(LOG_WARNING, "no unsaved dumps found"); 724 } 725 726 return (0); 727 } 728 729 static void 730 infohandler(int sig __unused) 731 { 732 got_siginfo = 1; 733 } 734