savecore.c revision 142533
1181624Skmacy/*- 2181624Skmacy * Copyright (c) 2002 Poul-Henning Kamp 3181624Skmacy * Copyright (c) 2002 Networks Associates Technology, Inc. 4181624Skmacy * All rights reserved. 5181624Skmacy * 6181624Skmacy * This software was developed for the FreeBSD Project by Poul-Henning Kamp 7181624Skmacy * and NAI Labs, the Security Research Division of Network Associates, Inc. 8181624Skmacy * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 9181624Skmacy * DARPA CHATS research program. 10181624Skmacy * 11181624Skmacy * Redistribution and use in source and binary forms, with or without 12181624Skmacy * modification, are permitted provided that the following conditions 13181624Skmacy * are met: 14181624Skmacy * 1. Redistributions of source code must retain the above copyright 15181624Skmacy * notice, this list of conditions and the following disclaimer. 16181624Skmacy * 2. Redistributions in binary form must reproduce the above copyright 17181624Skmacy * notice, this list of conditions and the following disclaimer in the 18181624Skmacy * documentation and/or other materials provided with the distribution. 19181624Skmacy * 3. The names of the authors may not be used to endorse or promote 20181624Skmacy * products derived from this software without specific prior written 21181624Skmacy * permission. 22181624Skmacy * 23181624Skmacy * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24181624Skmacy * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25181624Skmacy * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26181624Skmacy * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27181624Skmacy * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28181624Skmacy * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29181624Skmacy * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30181624Skmacy * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31181624Skmacy * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32181624Skmacy * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33181624Skmacy * SUCH DAMAGE. 34181624Skmacy * 35181624Skmacy * Copyright (c) 1986, 1992, 1993 36181624Skmacy * The Regents of the University of California. All rights reserved. 37181624Skmacy * 38181624Skmacy * Redistribution and use in source and binary forms, with or without 39181624Skmacy * modification, are permitted provided that the following conditions 40181624Skmacy * are met: 41181624Skmacy * 1. Redistributions of source code must retain the above copyright 42181624Skmacy * notice, this list of conditions and the following disclaimer. 43181624Skmacy * 2. Redistributions in binary form must reproduce the above copyright 44181624Skmacy * notice, this list of conditions and the following disclaimer in the 45181624Skmacy * documentation and/or other materials provided with the distribution. 46181624Skmacy * 3. All advertising materials mentioning features or use of this software 47181624Skmacy * must display the following acknowledgement: 48181624Skmacy * This product includes software developed by the University of 49181624Skmacy * California, Berkeley and its contributors. 50181624Skmacy * 4. Neither the name of the University nor the names of its contributors 51181624Skmacy * may be used to endorse or promote products derived from this software 52181624Skmacy * without specific prior written permission. 53181624Skmacy * 54181624Skmacy * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55181624Skmacy * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56181624Skmacy * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57181624Skmacy * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58181624Skmacy * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59181624Skmacy * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60181624Skmacy * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61181624Skmacy * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62181624Skmacy * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63181624Skmacy * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64181624Skmacy * SUCH DAMAGE. 65181624Skmacy */ 66181624Skmacy 67181624Skmacy#include <sys/cdefs.h> 68181624Skmacy__FBSDID("$FreeBSD: head/sbin/savecore/savecore.c 142533 2005-02-26 01:19:21Z obrien $"); 69181624Skmacy 70181624Skmacy#include <sys/param.h> 71181624Skmacy#include <sys/disk.h> 72181624Skmacy#include <sys/kerneldump.h> 73181624Skmacy#include <sys/param.h> 74181624Skmacy#include <sys/mount.h> 75181624Skmacy#include <sys/stat.h> 76181624Skmacy#include <errno.h> 77181624Skmacy#include <fcntl.h> 78181624Skmacy#include <fstab.h> 79181624Skmacy#include <paths.h> 80181624Skmacy#include <stdarg.h> 81181624Skmacy#include <stdio.h> 82181624Skmacy#include <stdlib.h> 83181624Skmacy#include <string.h> 84181624Skmacy#include <syslog.h> 85181624Skmacy#include <time.h> 86181624Skmacy#include <unistd.h> 87181624Skmacy 88181624Skmacy/* The size of the buffer used for I/O. */ 89181624Skmacy#define BUFFERSIZE (1024*1024) 90181624Skmacy 91181624Skmacy#define STATUS_BAD 0 92181624Skmacy#define STATUS_GOOD 1 93181624Skmacy#define STATUS_UNKNOWN 2 94181624Skmacy 95181624Skmacystatic int checkfor, compress, clear, force, keep, verbose; /* flags */ 96181624Skmacystatic int nfound, nsaved, nerr; /* statistics */ 97181624Skmacy 98181624Skmacyextern FILE *zopen(const char *, const char *); 99181624Skmacy 100181624Skmacystatic void 101181624Skmacyprintheader(FILE *f, const struct kerneldumpheader *h, const char *device, 102181624Skmacy int bounds, const int status) 103181624Skmacy{ 104181624Skmacy uint64_t dumplen; 105181624Skmacy time_t t; 106181624Skmacy const char *stat_str; 107181624Skmacy 108181624Skmacy fprintf(f, "Dump header from device %s\n", device); 109181624Skmacy fprintf(f, " Architecture: %s\n", h->architecture); 110181624Skmacy fprintf(f, " Architecture Version: %u\n", h->architectureversion); 111181624Skmacy dumplen = dtoh64(h->dumplength); 112181624Skmacy fprintf(f, " Dump Length: %lldB (%lld MB)\n", (long long)dumplen, 113181624Skmacy (long long)(dumplen >> 20)); 114181624Skmacy fprintf(f, " Blocksize: %d\n", dtoh32(h->blocksize)); 115181624Skmacy t = dtoh64(h->dumptime); 116181624Skmacy fprintf(f, " Dumptime: %s", ctime(&t)); 117181624Skmacy fprintf(f, " Hostname: %s\n", h->hostname); 118181624Skmacy fprintf(f, " Magic: %s\n", h->magic); 119181624Skmacy fprintf(f, " Version String: %s", h->versionstring); 120181624Skmacy fprintf(f, " Panic String: %s\n", h->panicstring); 121181624Skmacy fprintf(f, " Dump Parity: %u\n", h->parity); 122181624Skmacy fprintf(f, " Bounds: %d\n", bounds); 123181624Skmacy 124181624Skmacy switch(status) { 125181624Skmacy case STATUS_BAD: 126181624Skmacy stat_str = "bad"; 127181624Skmacy break; 128181624Skmacy case STATUS_GOOD: 129181624Skmacy stat_str = "good"; 130181624Skmacy break; 131181624Skmacy default: 132181624Skmacy stat_str = "unknown"; 133181624Skmacy } 134181624Skmacy fprintf(f, " Dump Status: %s\n", stat_str); 135181624Skmacy fflush(f); 136181624Skmacy} 137181624Skmacy 138181624Skmacystatic int 139181624Skmacygetbounds(void) { 140181624Skmacy FILE *fp; 141181624Skmacy char buf[6]; 142181624Skmacy int ret; 143181624Skmacy 144181624Skmacy ret = 0; 145181624Skmacy 146181624Skmacy if ((fp = fopen("bounds", "r")) == NULL) { 147181624Skmacy syslog(LOG_WARNING, "unable to open bounds file, using 0"); 148181624Skmacy goto newfile; 149181624Skmacy } 150181624Skmacy 151181624Skmacy if (fgets(buf, sizeof buf, fp) == NULL) { 152181624Skmacy syslog(LOG_WARNING, "unable to read from bounds, using 0"); 153181624Skmacy fclose(fp); 154181624Skmacy goto newfile; 155181624Skmacy } 156181624Skmacy 157181624Skmacy errno = 0; 158181624Skmacy ret = (int)strtol(buf, NULL, 10); 159181624Skmacy if (ret == 0 && (errno == EINVAL || errno == ERANGE)) 160181624Skmacy syslog(LOG_WARNING, "invalid value found in bounds, using 0"); 161181624Skmacy 162181624Skmacynewfile: 163181624Skmacy 164181624Skmacy if ((fp = fopen("bounds", "w")) == NULL) { 165181624Skmacy syslog(LOG_WARNING, "unable to write to bounds file: %m"); 166181624Skmacy goto done; 167181624Skmacy } 168181624Skmacy 169181624Skmacy if (verbose) 170181624Skmacy printf("bounds number: %d\n", ret); 171181624Skmacy 172181624Skmacy fprintf(fp, "%d\n", (ret + 1)); 173181624Skmacy fclose(fp); 174181624Skmacy 175181624Skmacydone: 176181624Skmacy return (ret); 177181624Skmacy} 178181624Skmacy 179181624Skmacy/* 180181624Skmacy * Check that sufficient space is available on the disk that holds the 181181624Skmacy * save directory. 182181624Skmacy */ 183181624Skmacystatic int 184181624Skmacycheck_space(char *savedir, off_t dumpsize) 185181624Skmacy{ 186181624Skmacy FILE *fp; 187181624Skmacy off_t minfree, spacefree, totfree, needed; 188181624Skmacy struct statfs fsbuf; 189181624Skmacy char buf[100], path[MAXPATHLEN]; 190181624Skmacy 191181624Skmacy if (statfs(savedir, &fsbuf) < 0) { 192181624Skmacy syslog(LOG_ERR, "%s: %m", savedir); 193181624Skmacy exit(1); 194181624Skmacy } 195181624Skmacy spacefree = ((off_t) fsbuf.f_bavail * fsbuf.f_bsize) / 1024; 196181624Skmacy totfree = ((off_t) fsbuf.f_bfree * fsbuf.f_bsize) / 1024; 197181624Skmacy 198181624Skmacy (void)snprintf(path, sizeof(path), "%s/minfree", savedir); 199181624Skmacy if ((fp = fopen(path, "r")) == NULL) 200181624Skmacy minfree = 0; 201181624Skmacy else { 202181624Skmacy if (fgets(buf, sizeof(buf), fp) == NULL) 203181624Skmacy minfree = 0; 204181624Skmacy else 205181624Skmacy minfree = atoi(buf); 206181624Skmacy (void)fclose(fp); 207181624Skmacy } 208181624Skmacy 209181624Skmacy needed = dumpsize / 1024 + 2; /* 2 for info file */ 210181624Skmacy if (((minfree > 0) ? spacefree : totfree) - needed < minfree) { 211181624Skmacy syslog(LOG_WARNING, 212181624Skmacy "no dump, not enough free space on device (%lld available, need %lld)", 213181624Skmacy (long long)(minfree > 0 ? spacefree : totfree), 214181624Skmacy (long long)needed); 215181624Skmacy return (0); 216181624Skmacy } 217181624Skmacy if (spacefree - needed < 0) 218181624Skmacy syslog(LOG_WARNING, 219181624Skmacy "dump performed, but free space threshold crossed"); 220181624Skmacy return (1); 221181624Skmacy} 222181624Skmacy 223181624Skmacy#define BLOCKSIZE (1<<12) 224181624Skmacy#define BLOCKMASK (~(BLOCKSIZE-1)) 225181624Skmacy 226181624Skmacystatic void 227181624SkmacyDoFile(char *savedir, const char *device) 228181624Skmacy{ 229181624Skmacy static char *buf = NULL; 230181624Skmacy struct kerneldumpheader kdhf, kdhl; 231181624Skmacy off_t mediasize, dumpsize, firsthd, lasthd, dmpcnt; 232181624Skmacy FILE *info, *fp; 233181624Skmacy mode_t oumask; 234181624Skmacy int fd, fdinfo, error, wl; 235181624Skmacy int nr, nw, hs, he = 0; 236181624Skmacy int bounds, status; 237181624Skmacy u_int sectorsize; 238181624Skmacy 239181624Skmacy bounds = getbounds(); 240181624Skmacy dmpcnt = 0; 241181624Skmacy mediasize = 0; 242181624Skmacy status = STATUS_UNKNOWN; 243181624Skmacy 244181624Skmacy if (buf == NULL) { 245181624Skmacy buf = malloc(BUFFERSIZE); 246181624Skmacy if (buf == NULL) { 247181624Skmacy syslog(LOG_ERR, "%m"); 248181624Skmacy return; 249181624Skmacy } 250181624Skmacy } 251181624Skmacy 252181624Skmacy if (verbose) 253181624Skmacy printf("checking for kernel dump on device %s\n", device); 254181624Skmacy 255181624Skmacy fd = open(device, O_RDWR); 256181624Skmacy if (fd < 0) { 257181624Skmacy syslog(LOG_ERR, "%s: %m", device); 258181624Skmacy return; 259181624Skmacy } 260181624Skmacy 261181624Skmacy error = ioctl(fd, DIOCGMEDIASIZE, &mediasize); 262181624Skmacy if (!error) 263181624Skmacy error = ioctl(fd, DIOCGSECTORSIZE, §orsize); 264181624Skmacy if (error) { 265181624Skmacy syslog(LOG_ERR, 266181624Skmacy "couldn't find media and/or sector size of %s: %m", device); 267181624Skmacy goto closefd; 268181624Skmacy } 269181624Skmacy 270181624Skmacy if (verbose) { 271181624Skmacy printf("mediasize = %lld\n", (long long)mediasize); 272181624Skmacy printf("sectorsize = %u\n", sectorsize); 273181624Skmacy } 274181624Skmacy 275181624Skmacy lasthd = mediasize - sectorsize; 276181624Skmacy lseek(fd, lasthd, SEEK_SET); 277181624Skmacy error = read(fd, &kdhl, sizeof kdhl); 278181624Skmacy if (error != sizeof kdhl) { 279181624Skmacy syslog(LOG_ERR, 280181624Skmacy "error reading last dump header at offset %lld in %s: %m", 281181624Skmacy (long long)lasthd, device); 282 goto closefd; 283 } 284 if (memcmp(kdhl.magic, KERNELDUMPMAGIC, sizeof kdhl.magic)) { 285 if (verbose) 286 printf("magic mismatch on last dump header on %s\n", 287 device); 288 289 status = STATUS_BAD; 290 if (force == 0) 291 goto closefd; 292 293 if (memcmp(kdhl.magic, KERNELDUMPMAGIC_CLEARED, 294 sizeof kdhl.magic) == 0) { 295 if (verbose) 296 printf("forcing magic on %s\n", device); 297 memcpy(kdhl.magic, KERNELDUMPMAGIC, 298 sizeof kdhl.magic); 299 } else { 300 syslog(LOG_ERR, "unable to force dump - bad magic"); 301 goto closefd; 302 } 303 } 304 if (dtoh32(kdhl.version) != KERNELDUMPVERSION) { 305 syslog(LOG_ERR, 306 "unknown version (%d) in last dump header on %s", 307 dtoh32(kdhl.version), device); 308 309 status = STATUS_BAD; 310 if (force == 0) 311 goto closefd; 312 } 313 314 nfound++; 315 if (clear) 316 goto nuke; 317 318 if (kerneldump_parity(&kdhl)) { 319 syslog(LOG_ERR, 320 "parity error on last dump header on %s", device); 321 nerr++; 322 status = STATUS_BAD; 323 if (force == 0) 324 goto closefd; 325 } 326 dumpsize = dtoh64(kdhl.dumplength); 327 firsthd = lasthd - dumpsize - sizeof kdhf; 328 lseek(fd, firsthd, SEEK_SET); 329 error = read(fd, &kdhf, sizeof kdhf); 330 if (error != sizeof kdhf) { 331 syslog(LOG_ERR, 332 "error reading first dump header at offset %lld in %s: %m", 333 (long long)firsthd, device); 334 nerr++; 335 goto closefd; 336 } 337 338 if (verbose >= 2) { 339 printf("First dump headers:\n"); 340 printheader(stdout, &kdhf, device, bounds, -1); 341 342 printf("\nLast dump headers:\n"); 343 printheader(stdout, &kdhl, device, bounds, -1); 344 printf("\n"); 345 } 346 347 if (memcmp(&kdhl, &kdhf, sizeof kdhl)) { 348 syslog(LOG_ERR, 349 "first and last dump headers disagree on %s", device); 350 nerr++; 351 status = STATUS_BAD; 352 if (force == 0) 353 goto closefd; 354 } else { 355 status = STATUS_GOOD; 356 } 357 358 if (checkfor) { 359 printf("A dump exists on %s\n", device); 360 close(fd); 361 exit(0); 362 } 363 364 if (kdhl.panicstring[0]) 365 syslog(LOG_ALERT, "reboot after panic: %s", kdhl.panicstring); 366 else 367 syslog(LOG_ALERT, "reboot"); 368 369 if (verbose) 370 printf("Checking for available free space\n"); 371 if (!check_space(savedir, dumpsize)) { 372 nerr++; 373 goto closefd; 374 } 375 376 sprintf(buf, "info.%d", bounds); 377 378 /* 379 * Create or overwrite any existing dump header files. 380 */ 381 fdinfo = open(buf, O_WRONLY | O_CREAT | O_TRUNC, 0600); 382 if (fdinfo < 0) { 383 syslog(LOG_ERR, "%s: %m", buf); 384 nerr++; 385 goto closefd; 386 } 387 oumask = umask(S_IRWXG|S_IRWXO); /* Restrict access to the core file.*/ 388 if (compress) { 389 sprintf(buf, "vmcore.%d.gz", bounds); 390 fp = zopen(buf, "w"); 391 } else { 392 sprintf(buf, "vmcore.%d", bounds); 393 fp = fopen(buf, "w"); 394 } 395 if (fp == NULL) { 396 syslog(LOG_ERR, "%s: %m", buf); 397 close(fdinfo); 398 nerr++; 399 goto closefd; 400 } 401 (void)umask(oumask); 402 403 info = fdopen(fdinfo, "w"); 404 405 if (verbose) 406 printheader(stdout, &kdhl, device, bounds, status); 407 408 printheader(info, &kdhl, device, bounds, status); 409 fclose(info); 410 411 syslog(LOG_NOTICE, "writing %score to %s", 412 compress ? "compressed " : "", buf); 413 414 while (dumpsize > 0) { 415 wl = BUFFERSIZE; 416 if (wl > dumpsize) 417 wl = dumpsize; 418 nr = read(fd, buf, wl); 419 if (nr != wl) { 420 if (nr == 0) 421 syslog(LOG_WARNING, 422 "WARNING: EOF on dump device"); 423 else 424 syslog(LOG_ERR, "read error on %s: %m", device); 425 nerr++; 426 goto closeall; 427 } 428 if (compress) { 429 nw = fwrite(buf, 1, wl, fp); 430 } else { 431 for (nw = 0; nw < nr; nw = he) { 432 /* find a contiguous block of zeroes */ 433 for (hs = nw; hs < nr; hs += BLOCKSIZE) { 434 for (he = hs; he < nr && buf[he] == 0; 435 ++he) 436 /* nothing */ ; 437 /* is the hole long enough to matter? */ 438 if (he >= hs + BLOCKSIZE) 439 break; 440 } 441 442 /* back down to a block boundary */ 443 he &= BLOCKMASK; 444 445 /* 446 * 1) Don't go beyond the end of the buffer. 447 * 2) If the end of the buffer is less than 448 * BLOCKSIZE bytes away, we're at the end 449 * of the file, so just grab what's left. 450 */ 451 if (hs + BLOCKSIZE > nr) 452 hs = he = nr; 453 454 /* 455 * At this point, we have a partial ordering: 456 * nw <= hs <= he <= nr 457 * If hs > nw, buf[nw..hs] contains non-zero data. 458 * If he > hs, buf[hs..he] is all zeroes. 459 */ 460 if (hs > nw) 461 if (fwrite(buf + nw, hs - nw, 1, fp) 462 != 1) 463 break; 464 if (he > hs) 465 if (fseeko(fp, he - hs, SEEK_CUR) == -1) 466 break; 467 } 468 } 469 if (nw != wl) { 470 syslog(LOG_ERR, 471 "write error on vmcore.%d file: %m", bounds); 472 syslog(LOG_WARNING, 473 "WARNING: vmcore may be incomplete"); 474 nerr++; 475 goto closeall; 476 } 477 if (verbose) { 478 dmpcnt += wl; 479 printf("%llu\r", (unsigned long long)dmpcnt); 480 fflush(stdout); 481 } 482 dumpsize -= wl; 483 } 484 if (verbose) 485 printf("\n"); 486 487 if (fclose(fp) < 0) { 488 syslog(LOG_ERR, "error on vmcore.%d: %m", bounds); 489 nerr++; 490 goto closeall; 491 } 492 nsaved++; 493 494 if (verbose) 495 printf("dump saved\n"); 496 497nuke: 498 if (clear || !keep) { 499 if (verbose) 500 printf("clearing dump header\n"); 501 memcpy(kdhl.magic, KERNELDUMPMAGIC_CLEARED, sizeof kdhl.magic); 502 lseek(fd, lasthd, SEEK_SET); 503 error = write(fd, &kdhl, sizeof kdhl); 504 if (error != sizeof kdhl) 505 syslog(LOG_ERR, 506 "error while clearing the dump header: %m"); 507 } 508 close(fd); 509 return; 510 511closeall: 512 fclose(fp); 513 514closefd: 515 close(fd); 516} 517 518static void 519usage(void) 520{ 521 fprintf(stderr, "%s\n%s\n%s\n", 522 "usage: savecore -c", 523 " savecore -C [-v] [directory device]", 524 " savecore [-fkvz] [directory [device ...]]"); 525 exit (1); 526} 527 528int 529main(int argc, char **argv) 530{ 531 char *savedir; 532 struct fstab *fsp; 533 int i, ch, error; 534 535 checkfor = compress = clear = force = keep = verbose = 0; 536 nfound = nsaved = nerr = 0; 537 538 openlog("savecore", LOG_PERROR, LOG_DAEMON); 539 540 savedir = strdup("."); 541 if (savedir == NULL) { 542 syslog(LOG_ERR, "Cannot allocate memory"); 543 exit(1); 544 } 545 while ((ch = getopt(argc, argv, "Ccfkvz")) != -1) 546 switch(ch) { 547 case 'C': 548 checkfor = 1; 549 break; 550 case 'c': 551 clear = 1; 552 break; 553 case 'k': 554 keep = 1; 555 break; 556 case 'v': 557 verbose++; 558 break; 559 case 'f': 560 force = 1; 561 break; 562 case 'z': 563 compress = 1; 564 break; 565 case '?': 566 default: 567 usage(); 568 } 569 if (checkfor && (clear || force || keep)) 570 usage(); 571 argc -= optind; 572 argv += optind; 573 if (argc >= 1) { 574 error = chdir(argv[0]); 575 if (error) { 576 syslog(LOG_ERR, "chdir(%s): %m", argv[0]); 577 exit(1); 578 } 579 savedir = argv[0]; 580 argc--; 581 argv++; 582 } 583 if (argc == 0) { 584 for (;;) { 585 fsp = getfsent(); 586 if (fsp == NULL) 587 break; 588 if (strcmp(fsp->fs_vfstype, "swap") && 589 strcmp(fsp->fs_vfstype, "dump")) 590 continue; 591 DoFile(savedir, fsp->fs_spec); 592 } 593 } else { 594 for (i = 0; i < argc; i++) 595 DoFile(savedir, argv[i]); 596 } 597 598 /* Emit minimal output. */ 599 if (nfound == 0) { 600 if (checkfor) { 601 printf("No dump exists\n"); 602 exit(1); 603 } 604 syslog(LOG_WARNING, "no dumps found"); 605 } 606 else if (nsaved == 0) { 607 if (nerr != 0) 608 syslog(LOG_WARNING, "unsaved dumps found but not saved"); 609 else 610 syslog(LOG_WARNING, "no unsaved dumps found"); 611 } 612 613 return (0); 614} 615