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