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