1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1991, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static const char copyright[] = 34 "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/1/95"; 41 #endif 42 static const char rcsid[] = 43 "$FreeBSD$"; 44 #endif /* not lint */ 45 46 #include <sys/param.h> 47 #include <sys/stat.h> 48 #include <sys/mount.h> 49 #include <sys/disklabel.h> 50 51 #include <ufs/ufs/extattr.h> 52 #include <ufs/ufs/quota.h> 53 #include <ufs/ufs/dinode.h> 54 #include <ufs/ufs/ufsmount.h> 55 #include <ufs/ffs/fs.h> 56 57 #include <protocols/dumprestore.h> 58 59 #include <ctype.h> 60 #include <err.h> 61 #include <errno.h> 62 #include <fcntl.h> 63 #include <fstab.h> 64 #include <libufs.h> 65 #include <limits.h> 66 #include <signal.h> 67 #include <stdint.h> 68 #include <stdio.h> 69 #include <stdlib.h> 70 #include <string.h> 71 #include <time.h> 72 #include <timeconv.h> 73 #include <unistd.h> 74 75 #include "dump.h" 76 #include "pathnames.h" 77 78 int mapsize; /* size of the state maps */ 79 char *usedinomap; /* map of allocated inodes */ 80 char *dumpdirmap; /* map of directories to be dumped */ 81 char *dumpinomap; /* map of files to be dumped */ 82 char *disk; /* name of the disk file */ 83 char *tape; /* name of the tape file */ 84 char *popenout; /* popen(3) per-"tape" command */ 85 int level; /* dump level of this dump */ 86 int uflag; /* update flag */ 87 int diskfd; /* disk file descriptor */ 88 int pipeout; /* true => output to standard output */ 89 int density = 0; /* density in bytes/0.1" " <- this is for hilit19 */ 90 long tapesize; /* estimated tape size, blocks */ 91 long tsize; /* tape size in 0.1" units */ 92 int etapes; /* estimated number of tapes */ 93 int nonodump; /* if set, do not honor UF_NODUMP user flags */ 94 int unlimited; /* if set, write to end of medium */ 95 int cachesize = 0; /* block cache size (in bytes), defaults to 0 */ 96 int rsync_friendly; /* be friendly with rsync */ 97 int notify = 0; /* notify operator flag */ 98 int blockswritten = 0; /* number of blocks written on current tape */ 99 int tapeno = 0; /* current tape number */ 100 int ntrec = NTREC; /* # tape blocks in each tape record */ 101 long blocksperfile; /* number of blocks per output file */ 102 int cartridge = 0; /* Assume non-cartridge tape */ 103 char *host = NULL; /* remote host (if any) */ 104 time_t tstart_writing; /* when started writing the first tape block */ 105 time_t tend_writing; /* after writing the last tape block */ 106 int passno; /* current dump pass number */ 107 struct fs *sblock; /* the file system super block */ 108 long dev_bsize = 1; /* recalculated below */ 109 int dev_bshift; /* log2(dev_bsize) */ 110 int tp_bshift; /* log2(TP_BSIZE) */ 111 int snapdump = 0; /* dumping live filesystem, so use snapshot */ 112 113 static char *getmntpt(char *, int *); 114 static long numarg(const char *, long, long); 115 static void obsolete(int *, char **[]); 116 static void usage(void) __dead2; 117 118 int 119 main(int argc, char *argv[]) 120 { 121 struct stat sb; 122 ino_t ino; 123 int dirty; 124 union dinode *dp; 125 struct fstab *dt; 126 char *map, *mntpt; 127 int ch, mode, mntflags; 128 int i, ret, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1; 129 int just_estimate = 0; 130 ino_t maxino; 131 char *tmsg; 132 133 spcl.c_date = _time_to_time64(time(NULL)); 134 135 tsize = 0; /* Default later, based on 'c' option for cart tapes */ 136 dumpdates = _PATH_DUMPDATES; 137 popenout = NULL; 138 tape = NULL; 139 if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0) 140 quit("TP_BSIZE must be a multiple of DEV_BSIZE\n"); 141 level = 0; 142 rsync_friendly = 0; 143 144 if (argc < 2) 145 usage(); 146 147 obsolete(&argc, &argv); 148 while ((ch = getopt(argc, argv, 149 "0123456789aB:b:C:cD:d:f:h:LnP:RrSs:T:uWw")) != -1) 150 switch (ch) { 151 /* dump level */ 152 case '0': case '1': case '2': case '3': case '4': 153 case '5': case '6': case '7': case '8': case '9': 154 level = 10 * level + ch - '0'; 155 break; 156 157 case 'a': /* `auto-size', Write to EOM. */ 158 unlimited = 1; 159 break; 160 161 case 'B': /* blocks per output file */ 162 blocksperfile = numarg("number of blocks per file", 163 1L, 0L); 164 break; 165 166 case 'b': /* blocks per tape write */ 167 ntrec = numarg("number of blocks per write", 168 1L, 1000L); 169 break; 170 171 case 'C': 172 cachesize = numarg("cachesize", 0, 0) * 1024 * 1024; 173 break; 174 175 case 'c': /* Tape is cart. not 9-track */ 176 cartridge = 1; 177 break; 178 179 case 'D': 180 dumpdates = optarg; 181 break; 182 183 case 'd': /* density, in bits per inch */ 184 density = numarg("density", 10L, 327670L) / 10; 185 if (density >= 625 && !bflag) 186 ntrec = HIGHDENSITYTREC; 187 break; 188 189 case 'f': /* output file */ 190 if (popenout != NULL) 191 errx(X_STARTUP, "You cannot use the P and f " 192 "flags together.\n"); 193 tape = optarg; 194 break; 195 196 case 'h': 197 honorlevel = numarg("honor level", 0L, 10L); 198 break; 199 200 case 'L': 201 snapdump = 1; 202 break; 203 204 case 'n': /* notify operators */ 205 notify = 1; 206 break; 207 208 case 'P': 209 if (tape != NULL) 210 errx(X_STARTUP, "You cannot use the P and f " 211 "flags together.\n"); 212 popenout = optarg; 213 break; 214 215 case 'r': /* store slightly less data to be friendly to rsync */ 216 if (rsync_friendly < 1) 217 rsync_friendly = 1; 218 break; 219 220 case 'R': /* store even less data to be friendlier to rsync */ 221 if (rsync_friendly < 2) 222 rsync_friendly = 2; 223 break; 224 225 case 'S': /* exit after estimating # of tapes */ 226 just_estimate = 1; 227 break; 228 229 case 's': /* tape size, feet */ 230 tsize = numarg("tape size", 1L, 0L) * 12 * 10; 231 break; 232 233 case 'T': /* time of last dump */ 234 spcl.c_ddate = unctime(optarg); 235 if (spcl.c_ddate < 0) { 236 (void)fprintf(stderr, "bad time \"%s\"\n", 237 optarg); 238 exit(X_STARTUP); 239 } 240 Tflag = 1; 241 lastlevel = -1; 242 break; 243 244 case 'u': /* update /etc/dumpdates */ 245 uflag = 1; 246 break; 247 248 case 'W': /* what to do */ 249 case 'w': 250 lastdump(ch); 251 exit(X_FINOK); /* do nothing else */ 252 253 default: 254 usage(); 255 } 256 argc -= optind; 257 argv += optind; 258 259 if (argc < 1) { 260 (void)fprintf(stderr, "Must specify disk or file system\n"); 261 exit(X_STARTUP); 262 } 263 disk = *argv++; 264 argc--; 265 if (argc >= 1) { 266 (void)fprintf(stderr, "Unknown arguments to dump:"); 267 while (argc--) 268 (void)fprintf(stderr, " %s", *argv++); 269 (void)fprintf(stderr, "\n"); 270 exit(X_STARTUP); 271 } 272 if (rsync_friendly && (level > 0)) { 273 (void)fprintf(stderr, "%s %s\n", "rsync friendly options", 274 "can be used only with level 0 dumps."); 275 exit(X_STARTUP); 276 } 277 if (Tflag && uflag) { 278 (void)fprintf(stderr, 279 "You cannot use the T and u flags together.\n"); 280 exit(X_STARTUP); 281 } 282 if (popenout) { 283 tape = "child pipeline process"; 284 } else if (tape == NULL && (tape = getenv("TAPE")) == NULL) 285 tape = _PATH_DEFTAPE; 286 if (strcmp(tape, "-") == 0) { 287 pipeout++; 288 tape = "standard output"; 289 } 290 291 if (blocksperfile) 292 blocksperfile = rounddown(blocksperfile, ntrec); 293 else if (!unlimited) { 294 /* 295 * Determine how to default tape size and density 296 * 297 * density tape size 298 * 9-track 1600 bpi (160 bytes/.1") 2300 ft. 299 * 9-track 6250 bpi (625 bytes/.1") 2300 ft. 300 * cartridge 8000 bpi (100 bytes/.1") 1700 ft. 301 * (450*4 - slop) 302 * hilit19 hits again: " 303 */ 304 if (density == 0) 305 density = cartridge ? 100 : 160; 306 if (tsize == 0) 307 tsize = cartridge ? 1700L*120L : 2300L*120L; 308 } 309 310 if (strchr(tape, ':')) { 311 host = tape; 312 tape = strchr(host, ':'); 313 *tape++ = '\0'; 314 #ifdef RDUMP 315 if (strchr(tape, '\n')) { 316 (void)fprintf(stderr, "invalid characters in tape\n"); 317 exit(X_STARTUP); 318 } 319 if (rmthost(host) == 0) 320 exit(X_STARTUP); 321 #else 322 (void)fprintf(stderr, "remote dump not enabled\n"); 323 exit(X_STARTUP); 324 #endif 325 } 326 (void)setuid(getuid()); /* rmthost() is the only reason to be setuid */ 327 328 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) 329 signal(SIGHUP, sig); 330 if (signal(SIGTRAP, SIG_IGN) != SIG_IGN) 331 signal(SIGTRAP, sig); 332 if (signal(SIGFPE, SIG_IGN) != SIG_IGN) 333 signal(SIGFPE, sig); 334 if (signal(SIGBUS, SIG_IGN) != SIG_IGN) 335 signal(SIGBUS, sig); 336 if (signal(SIGSEGV, SIG_IGN) != SIG_IGN) 337 signal(SIGSEGV, sig); 338 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) 339 signal(SIGTERM, sig); 340 if (signal(SIGINT, interrupt) == SIG_IGN) 341 signal(SIGINT, SIG_IGN); 342 343 dump_getfstab(); /* /etc/fstab snarfed */ 344 /* 345 * disk can be either the full special file name, 346 * the suffix of the special file name, 347 * the special name missing the leading '/', 348 * the file system name with or without the leading '/'. 349 */ 350 dt = fstabsearch(disk); 351 if (dt != NULL) { 352 disk = rawname(dt->fs_spec); 353 if (disk == NULL) 354 errx(X_STARTUP, "%s: unknown file system", dt->fs_spec); 355 (void)strncpy(spcl.c_dev, dt->fs_spec, NAMELEN); 356 (void)strncpy(spcl.c_filesys, dt->fs_file, NAMELEN); 357 } else { 358 (void)strncpy(spcl.c_dev, disk, NAMELEN); 359 (void)strncpy(spcl.c_filesys, "an unlisted file system", 360 NAMELEN); 361 } 362 spcl.c_dev[NAMELEN-1]='\0'; 363 spcl.c_filesys[NAMELEN-1]='\0'; 364 365 if ((mntpt = getmntpt(disk, &mntflags)) != NULL) { 366 if (mntflags & MNT_RDONLY) { 367 if (snapdump != 0) { 368 msg("WARNING: %s\n", 369 "-L ignored for read-only filesystem."); 370 snapdump = 0; 371 } 372 } else if (snapdump == 0) { 373 msg("WARNING: %s\n", 374 "should use -L when dumping live read-write " 375 "filesystems!"); 376 } else { 377 char snapname[BUFSIZ], snapcmd[BUFSIZ]; 378 379 snprintf(snapname, sizeof snapname, "%s/.snap", mntpt); 380 if ((stat(snapname, &sb) < 0) || !S_ISDIR(sb.st_mode)) { 381 msg("WARNING: %s %s\n", 382 "-L requested but snapshot location", 383 snapname); 384 msg(" %s: %s\n", 385 "is not a directory", 386 "dump downgraded, -L ignored"); 387 snapdump = 0; 388 } else { 389 snprintf(snapname, sizeof snapname, 390 "%s/.snap/dump_snapshot", mntpt); 391 snprintf(snapcmd, sizeof snapcmd, "%s %s %s", 392 _PATH_MKSNAP_FFS, mntpt, snapname); 393 unlink(snapname); 394 if (system(snapcmd) != 0) 395 errx(X_STARTUP, "Cannot create %s: %s\n", 396 snapname, strerror(errno)); 397 if ((diskfd = open(snapname, O_RDONLY)) < 0) { 398 unlink(snapname); 399 errx(X_STARTUP, "Cannot open %s: %s\n", 400 snapname, strerror(errno)); 401 } 402 unlink(snapname); 403 if (fstat(diskfd, &sb) != 0) 404 err(X_STARTUP, "%s: stat", snapname); 405 spcl.c_date = _time_to_time64(sb.st_mtime); 406 } 407 } 408 } else if (snapdump != 0) { 409 msg("WARNING: Cannot use -L on an unmounted filesystem.\n"); 410 snapdump = 0; 411 } 412 if (snapdump == 0) { 413 if ((diskfd = open(disk, O_RDONLY)) < 0) 414 err(X_STARTUP, "Cannot open %s", disk); 415 if (fstat(diskfd, &sb) != 0) 416 err(X_STARTUP, "%s: stat", disk); 417 if (S_ISDIR(sb.st_mode)) 418 errx(X_STARTUP, "%s: unknown file system", disk); 419 } 420 421 (void)strcpy(spcl.c_label, "none"); 422 (void)gethostname(spcl.c_host, NAMELEN); 423 spcl.c_level = level; 424 spcl.c_type = TS_TAPE; 425 if (rsync_friendly) { 426 /* don't store real dump times */ 427 spcl.c_date = 0; 428 spcl.c_ddate = 0; 429 } 430 if (spcl.c_date == 0) { 431 tmsg = "the epoch\n"; 432 } else { 433 time_t t = _time64_to_time(spcl.c_date); 434 tmsg = ctime(&t); 435 } 436 msg("Date of this level %d dump: %s", level, tmsg); 437 438 if (!Tflag && (!rsync_friendly)) 439 getdumptime(); /* /etc/dumpdates snarfed */ 440 if (spcl.c_ddate == 0) { 441 tmsg = "the epoch\n"; 442 } else { 443 time_t t = _time64_to_time(spcl.c_ddate); 444 tmsg = ctime(&t); 445 } 446 if (lastlevel < 0) 447 msg("Date of last (level unknown) dump: %s", tmsg); 448 else 449 msg("Date of last level %d dump: %s", lastlevel, tmsg); 450 451 msg("Dumping %s%s ", snapdump ? "snapshot of ": "", disk); 452 if (dt != NULL) 453 msgtail("(%s) ", dt->fs_file); 454 if (host) 455 msgtail("to %s on host %s\n", tape, host); 456 else 457 msgtail("to %s\n", tape); 458 459 sync(); 460 if ((ret = sbget(diskfd, &sblock, UFS_STDSB, UFS_NOCSUM)) != 0) { 461 switch (ret) { 462 case ENOENT: 463 warn("Cannot find file system superblock"); 464 return (1); 465 default: 466 warn("Unable to read file system superblock"); 467 return (1); 468 } 469 } 470 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 471 dev_bshift = ffs(dev_bsize) - 1; 472 if (dev_bsize != (1 << dev_bshift)) 473 quit("dev_bsize (%ld) is not a power of 2", dev_bsize); 474 tp_bshift = ffs(TP_BSIZE) - 1; 475 if (TP_BSIZE != (1 << tp_bshift)) 476 quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE); 477 maxino = sblock->fs_ipg * sblock->fs_ncg; 478 mapsize = roundup(howmany(maxino, CHAR_BIT), TP_BSIZE); 479 usedinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 480 dumpdirmap = (char *)calloc((unsigned) mapsize, sizeof(char)); 481 dumpinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 482 tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 483 484 nonodump = spcl.c_level < honorlevel; 485 486 passno = 1; 487 setproctitle("%s: pass 1: regular files", disk); 488 msg("mapping (Pass I) [regular files]\n"); 489 anydirskipped = mapfiles(maxino, &tapesize); 490 491 passno = 2; 492 setproctitle("%s: pass 2: directories", disk); 493 msg("mapping (Pass II) [directories]\n"); 494 while (anydirskipped) { 495 anydirskipped = mapdirs(maxino, &tapesize); 496 } 497 498 if (pipeout || unlimited) { 499 tapesize += 10; /* 10 trailer blocks */ 500 msg("estimated %ld tape blocks.\n", tapesize); 501 } else { 502 double fetapes; 503 504 if (blocksperfile) 505 fetapes = (double) tapesize / blocksperfile; 506 else if (cartridge) { 507 /* Estimate number of tapes, assuming streaming stops at 508 the end of each block written, and not in mid-block. 509 Assume no erroneous blocks; this can be compensated 510 for with an artificially low tape size. */ 511 fetapes = 512 ( (double) tapesize /* blocks */ 513 * TP_BSIZE /* bytes/block */ 514 * (1.0/density) /* 0.1" / byte " */ 515 + 516 (double) tapesize /* blocks */ 517 * (1.0/ntrec) /* streaming-stops per block */ 518 * 15.48 /* 0.1" / streaming-stop " */ 519 ) * (1.0 / tsize ); /* tape / 0.1" " */ 520 } else { 521 /* Estimate number of tapes, for old fashioned 9-track 522 tape */ 523 int tenthsperirg = (density == 625) ? 3 : 7; 524 fetapes = 525 ( (double) tapesize /* blocks */ 526 * TP_BSIZE /* bytes / block */ 527 * (1.0/density) /* 0.1" / byte " */ 528 + 529 (double) tapesize /* blocks */ 530 * (1.0/ntrec) /* IRG's / block */ 531 * tenthsperirg /* 0.1" / IRG " */ 532 ) * (1.0 / tsize ); /* tape / 0.1" " */ 533 } 534 etapes = fetapes; /* truncating assignment */ 535 etapes++; 536 /* count the dumped inodes map on each additional tape */ 537 tapesize += (etapes - 1) * 538 (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 539 tapesize += etapes + 10; /* headers + 10 trailer blks */ 540 msg("estimated %ld tape blocks on %3.2f tape(s).\n", 541 tapesize, fetapes); 542 } 543 544 /* 545 * If the user only wants an estimate of the number of 546 * tapes, exit now. 547 */ 548 if (just_estimate) 549 exit(0); 550 551 /* 552 * Allocate tape buffer. 553 */ 554 if (!alloctape()) 555 quit( 556 "can't allocate tape buffers - try a smaller blocking factor.\n"); 557 558 startnewtape(1); 559 (void)time((time_t *)&(tstart_writing)); 560 dumpmap(usedinomap, TS_CLRI, maxino - 1); 561 562 passno = 3; 563 setproctitle("%s: pass 3: directories", disk); 564 msg("dumping (Pass III) [directories]\n"); 565 dirty = 0; /* XXX just to get gcc to shut up */ 566 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) { 567 if (((ino - 1) % CHAR_BIT) == 0) /* map is offset by 1 */ 568 dirty = *map++; 569 else 570 dirty >>= 1; 571 if ((dirty & 1) == 0) 572 continue; 573 /* 574 * Skip directory inodes deleted and maybe reallocated 575 */ 576 dp = getino(ino, &mode); 577 if (mode != IFDIR) 578 continue; 579 (void)dumpino(dp, ino); 580 } 581 582 passno = 4; 583 setproctitle("%s: pass 4: regular files", disk); 584 msg("dumping (Pass IV) [regular files]\n"); 585 for (map = dumpinomap, ino = 1; ino < maxino; ino++) { 586 if (((ino - 1) % CHAR_BIT) == 0) /* map is offset by 1 */ 587 dirty = *map++; 588 else 589 dirty >>= 1; 590 if ((dirty & 1) == 0) 591 continue; 592 /* 593 * Skip inodes deleted and reallocated as directories. 594 */ 595 dp = getino(ino, &mode); 596 if (mode == IFDIR) 597 continue; 598 (void)dumpino(dp, ino); 599 } 600 601 (void)time((time_t *)&(tend_writing)); 602 spcl.c_type = TS_END; 603 for (i = 0; i < ntrec; i++) 604 writeheader(maxino - 1); 605 if (pipeout) 606 msg("DUMP: %jd tape blocks\n", (intmax_t)spcl.c_tapea); 607 else 608 msg("DUMP: %jd tape blocks on %d volume%s\n", 609 (intmax_t)spcl.c_tapea, spcl.c_volume, 610 (spcl.c_volume == 1) ? "" : "s"); 611 612 /* report dump performance, avoid division through zero */ 613 if (tend_writing - tstart_writing == 0) 614 msg("finished in less than a second\n"); 615 else 616 msg("finished in %jd seconds, throughput %jd KBytes/sec\n", 617 (intmax_t)tend_writing - tstart_writing, 618 (intmax_t)(spcl.c_tapea / 619 (tend_writing - tstart_writing))); 620 621 putdumptime(); 622 trewind(); 623 broadcast("DUMP IS DONE!\a\a\n"); 624 msg("DUMP IS DONE\n"); 625 Exit(X_FINOK); 626 /* NOTREACHED */ 627 } 628 629 static void 630 usage(void) 631 { 632 fprintf(stderr, 633 "usage: dump [-0123456789acLnSu] [-B records] [-b blocksize] [-C cachesize]\n" 634 " [-D dumpdates] [-d density] [-f file | -P pipecommand] [-h level]\n" 635 " [-s feet] [-T date] filesystem\n" 636 " dump -W | -w\n"); 637 exit(X_STARTUP); 638 } 639 640 /* 641 * Check to see if a disk is currently mounted. 642 */ 643 static char * 644 getmntpt(char *name, int *mntflagsp) 645 { 646 long mntsize, i; 647 struct statfs *mntbuf; 648 649 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 650 for (i = 0; i < mntsize; i++) { 651 if (!strcmp(mntbuf[i].f_mntfromname, name)) { 652 *mntflagsp = mntbuf[i].f_flags; 653 return (mntbuf[i].f_mntonname); 654 } 655 } 656 return (0); 657 } 658 659 /* 660 * Pick up a numeric argument. It must be nonnegative and in the given 661 * range (except that a vmax of 0 means unlimited). 662 */ 663 static long 664 numarg(const char *meaning, long vmin, long vmax) 665 { 666 char *p; 667 long val; 668 669 val = strtol(optarg, &p, 10); 670 if (*p) 671 errx(1, "illegal %s -- %s", meaning, optarg); 672 if (val < vmin || (vmax && val > vmax)) 673 errx(1, "%s must be between %ld and %ld", meaning, vmin, vmax); 674 return (val); 675 } 676 677 void 678 sig(int signo) 679 { 680 switch(signo) { 681 case SIGALRM: 682 case SIGBUS: 683 case SIGFPE: 684 case SIGHUP: 685 case SIGTERM: 686 case SIGTRAP: 687 if (pipeout) 688 quit("Signal on pipe: cannot recover\n"); 689 msg("Rewriting attempted as response to unknown signal.\n"); 690 (void)fflush(stderr); 691 (void)fflush(stdout); 692 close_rewind(); 693 exit(X_REWRITE); 694 /* NOTREACHED */ 695 case SIGSEGV: 696 msg("SIGSEGV: ABORTING!\n"); 697 (void)signal(SIGSEGV, SIG_DFL); 698 (void)kill(0, SIGSEGV); 699 /* NOTREACHED */ 700 } 701 } 702 703 char * 704 rawname(char *cp) 705 { 706 struct stat sb; 707 708 /* 709 * Ensure that the device passed in is a raw device. 710 */ 711 if (stat(cp, &sb) == 0 && (sb.st_mode & S_IFMT) == S_IFCHR) 712 return (cp); 713 714 /* 715 * Since there's only one device type now, we can't construct any 716 * better name, so we have to return NULL. 717 */ 718 return (NULL); 719 } 720 721 /* 722 * obsolete -- 723 * Change set of key letters and ordered arguments into something 724 * getopt(3) will like. 725 */ 726 static void 727 obsolete(int *argcp, char **argvp[]) 728 { 729 int argc, flags; 730 char *ap, **argv, *flagsp, **nargv, *p; 731 732 /* Setup. */ 733 argv = *argvp; 734 argc = *argcp; 735 736 /* 737 * Return if no arguments or first argument has leading 738 * dash or slash. 739 */ 740 ap = argv[1]; 741 if (argc == 1 || *ap == '-' || *ap == '/') 742 return; 743 744 /* Allocate space for new arguments. */ 745 if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL || 746 (p = flagsp = malloc(strlen(ap) + 2)) == NULL) 747 err(1, NULL); 748 749 *nargv++ = *argv; 750 argv += 2; 751 752 for (flags = 0; *ap; ++ap) { 753 switch (*ap) { 754 case 'B': 755 case 'b': 756 case 'd': 757 case 'f': 758 case 'D': 759 case 'C': 760 case 'h': 761 case 's': 762 case 'T': 763 if (*argv == NULL) { 764 warnx("option requires an argument -- %c", *ap); 765 usage(); 766 } 767 if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL) 768 err(1, NULL); 769 nargv[0][0] = '-'; 770 nargv[0][1] = *ap; 771 (void)strcpy(&nargv[0][2], *argv); 772 ++argv; 773 ++nargv; 774 break; 775 default: 776 if (!flags) { 777 *p++ = '-'; 778 flags = 1; 779 } 780 *p++ = *ap; 781 break; 782 } 783 } 784 785 /* Terminate flags. */ 786 if (flags) { 787 *p = '\0'; 788 *nargv++ = flagsp; 789 } else 790 free(flagsp); 791 792 /* Copy remaining arguments. */ 793 while ((*nargv++ = *argv++)); 794 795 /* Update argument count. */ 796 *argcp = nargv - *argvp - 1; 797 } 798