main.c revision 1.5
1 /*- 2 * Copyright (c) 1980, 1991, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static char copyright[] = 36 "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 /*static char sccsid[] = "from: @(#)main.c 8.4 (Berkeley) 4/15/94";*/ 42 static char *rcsid = "$Id: main.c,v 1.5 1995/02/20 22:36:01 mycroft Exp $"; 43 #endif /* not lint */ 44 45 #include <sys/param.h> 46 #include <sys/time.h> 47 #ifdef sunos 48 #include <sys/vnode.h> 49 50 #include <ufs/inode.h> 51 #include <ufs/fs.h> 52 #else 53 #include <ufs/ffs/fs.h> 54 #include <ufs/ufs/dinode.h> 55 #endif 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 <signal.h> 65 #include <stdio.h> 66 #include <stdlib.h> 67 #include <string.h> 68 #include <unistd.h> 69 70 #include "dump.h" 71 #include "pathnames.h" 72 73 #ifndef SBOFF 74 #define SBOFF (SBLOCK * DEV_BSIZE) 75 #endif 76 77 int notify = 0; /* notify operator flag */ 78 int blockswritten = 0; /* number of blocks written on current tape */ 79 int tapeno = 0; /* current tape number */ 80 int density = 0; /* density in bytes/0.1" */ 81 int ntrec = NTREC; /* # tape blocks in each tape record */ 82 int cartridge = 0; /* Assume non-cartridge tape */ 83 long dev_bsize = 1; /* recalculated below */ 84 long blocksperfile; /* output blocks per file */ 85 char *host = NULL; /* remote host (if any) */ 86 87 static long numarg __P((char *, long, long)); 88 static void obsolete __P((int *, char **[])); 89 static void usage __P((void)); 90 91 int 92 main(argc, argv) 93 int argc; 94 char *argv[]; 95 { 96 register ino_t ino; 97 register int dirty; 98 register struct dinode *dp; 99 register struct fstab *dt; 100 register char *map; 101 register int ch; 102 int i, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1; 103 ino_t maxino; 104 105 spcl.c_date = 0; 106 (void)time((time_t *)&spcl.c_date); 107 108 tsize = 0; /* Default later, based on 'c' option for cart tapes */ 109 tape = _PATH_DEFTAPE; 110 dumpdates = _PATH_DUMPDATES; 111 temp = _PATH_DTMP; 112 if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0) 113 quit("TP_BSIZE must be a multiple of DEV_BSIZE\n"); 114 level = '0'; 115 116 if (argc < 2) 117 usage(); 118 119 obsolete(&argc, &argv); 120 while ((ch = getopt(argc, argv, "0123456789B:b:cd:f:h:ns:T:uWw")) != -1) 121 switch (ch) { 122 /* dump level */ 123 case '0': case '1': case '2': case '3': case '4': 124 case '5': case '6': case '7': case '8': case '9': 125 level = ch; 126 break; 127 128 case 'B': /* blocks per output file */ 129 blocksperfile = numarg("blocks per file", 1L, 0L); 130 break; 131 132 case 'b': /* blocks per tape write */ 133 ntrec = numarg("blocks per write", 1L, 1000L); 134 break; 135 136 case 'c': /* Tape is cart. not 9-track */ 137 cartridge = 1; 138 break; 139 140 case 'd': /* density, in bits per inch */ 141 density = numarg("density", 10L, 327670L) / 10; 142 if (density >= 625 && !bflag) 143 ntrec = HIGHDENSITYTREC; 144 break; 145 146 case 'f': /* output file */ 147 tape = optarg; 148 break; 149 150 case 'h': 151 honorlevel = numarg("honor level", 0L, 10L); 152 break; 153 154 case 'n': /* notify operators */ 155 notify = 1; 156 break; 157 158 case 's': /* tape size, feet */ 159 tsize = numarg("tape size", 1L, 0L) * 12 * 10; 160 break; 161 162 case 'T': /* time of last dump */ 163 spcl.c_ddate = unctime(optarg); 164 if (spcl.c_ddate < 0) { 165 (void)fprintf(stderr, "bad time \"%s\"\n", 166 optarg); 167 exit(X_ABORT); 168 } 169 Tflag = 1; 170 lastlevel = '?'; 171 break; 172 173 case 'u': /* update /etc/dumpdates */ 174 uflag = 1; 175 break; 176 177 case 'W': /* what to do */ 178 case 'w': 179 lastdump(ch); 180 exit(0); /* do nothing else */ 181 182 default: 183 usage(); 184 } 185 argc -= optind; 186 argv += optind; 187 188 if (argc < 1) { 189 (void)fprintf(stderr, "Must specify disk or filesystem\n"); 190 exit(X_ABORT); 191 } 192 disk = *argv++; 193 argc--; 194 if (argc >= 1) { 195 (void)fprintf(stderr, "Unknown arguments to dump:"); 196 while (argc--) 197 (void)fprintf(stderr, " %s", *argv++); 198 (void)fprintf(stderr, "\n"); 199 exit(X_ABORT); 200 } 201 if (Tflag && uflag) { 202 (void)fprintf(stderr, 203 "You cannot use the T and u flags together.\n"); 204 exit(X_ABORT); 205 } 206 if (strcmp(tape, "-") == 0) { 207 pipeout++; 208 tape = "standard output"; 209 } 210 211 if (blocksperfile) 212 blocksperfile = blocksperfile / ntrec * ntrec; /* round down */ 213 else { 214 /* 215 * Determine how to default tape size and density 216 * 217 * density tape size 218 * 9-track 1600 bpi (160 bytes/.1") 2300 ft. 219 * 9-track 6250 bpi (625 bytes/.1") 2300 ft. 220 * cartridge 8000 bpi (100 bytes/.1") 1700 ft. 221 * (450*4 - slop) 222 */ 223 if (density == 0) 224 density = cartridge ? 100 : 160; 225 if (tsize == 0) 226 tsize = cartridge ? 1700L*120L : 2300L*120L; 227 } 228 229 if (strchr(tape, ':')) { 230 host = tape; 231 tape = strchr(host, ':'); 232 *tape++ = '\0'; 233 #ifdef RDUMP 234 if (rmthost(host) == 0) 235 exit(X_ABORT); 236 #else 237 (void)fprintf(stderr, "remote dump not enabled\n"); 238 exit(X_ABORT); 239 #endif 240 } 241 (void)setuid(getuid()); /* rmthost() is the only reason to be setuid */ 242 243 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) 244 signal(SIGHUP, sig); 245 if (signal(SIGTRAP, SIG_IGN) != SIG_IGN) 246 signal(SIGTRAP, sig); 247 if (signal(SIGFPE, SIG_IGN) != SIG_IGN) 248 signal(SIGFPE, sig); 249 if (signal(SIGBUS, SIG_IGN) != SIG_IGN) 250 signal(SIGBUS, sig); 251 if (signal(SIGSEGV, SIG_IGN) != SIG_IGN) 252 signal(SIGSEGV, sig); 253 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) 254 signal(SIGTERM, sig); 255 if (signal(SIGINT, interrupt) == SIG_IGN) 256 signal(SIGINT, SIG_IGN); 257 258 set_operators(); /* /etc/group snarfed */ 259 getfstab(); /* /etc/fstab snarfed */ 260 /* 261 * disk can be either the full special file name, 262 * the suffix of the special file name, 263 * the special name missing the leading '/', 264 * the file system name with or without the leading '/'. 265 */ 266 dt = fstabsearch(disk); 267 if (dt != NULL) { 268 disk = rawname(dt->fs_spec); 269 (void)strncpy(spcl.c_dev, dt->fs_spec, NAMELEN); 270 (void)strncpy(spcl.c_filesys, dt->fs_file, NAMELEN); 271 } else { 272 (void)strncpy(spcl.c_dev, disk, NAMELEN); 273 (void)strncpy(spcl.c_filesys, "an unlisted file system", 274 NAMELEN); 275 } 276 (void)strcpy(spcl.c_label, "none"); 277 (void)gethostname(spcl.c_host, NAMELEN); 278 spcl.c_level = level - '0'; 279 spcl.c_type = TS_TAPE; 280 if (!Tflag) 281 getdumptime(); /* /etc/dumpdates snarfed */ 282 283 msg("Date of this level %c dump: %s", level, 284 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 285 msg("Date of last level %c dump: %s", lastlevel, 286 spcl.c_ddate == 0 ? "the epoch\n" : ctime(&spcl.c_ddate)); 287 msg("Dumping %s ", disk); 288 if (dt != NULL) 289 msgtail("(%s) ", dt->fs_file); 290 if (host) 291 msgtail("to %s on host %s\n", tape, host); 292 else 293 msgtail("to %s\n", tape); 294 295 if ((diskfd = open(disk, O_RDONLY)) < 0) { 296 msg("Cannot open %s\n", disk); 297 exit(X_ABORT); 298 } 299 sync(); 300 sblock = (struct fs *)sblock_buf; 301 bread(SBOFF, (char *) sblock, SBSIZE); 302 if (sblock->fs_magic != FS_MAGIC) 303 quit("bad sblock magic number\n"); 304 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 305 dev_bshift = ffs(dev_bsize) - 1; 306 if (dev_bsize != (1 << dev_bshift)) 307 quit("dev_bsize (%d) is not a power of 2", dev_bsize); 308 tp_bshift = ffs(TP_BSIZE) - 1; 309 if (TP_BSIZE != (1 << tp_bshift)) 310 quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE); 311 #ifdef FS_44INODEFMT 312 if (sblock->fs_inodefmt >= FS_44INODEFMT) 313 spcl.c_flags |= DR_NEWINODEFMT; 314 #endif 315 maxino = sblock->fs_ipg * sblock->fs_ncg; 316 mapsize = roundup(howmany(maxino, NBBY), TP_BSIZE); 317 usedinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 318 dumpdirmap = (char *)calloc((unsigned) mapsize, sizeof(char)); 319 dumpinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 320 tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 321 322 nonodump = spcl.c_level < honorlevel; 323 324 msg("mapping (Pass I) [regular files]\n"); 325 anydirskipped = mapfiles(maxino, &tapesize); 326 327 msg("mapping (Pass II) [directories]\n"); 328 while (anydirskipped) { 329 anydirskipped = mapdirs(maxino, &tapesize); 330 } 331 332 if (pipeout) { 333 tapesize += 10; /* 10 trailer blocks */ 334 msg("estimated %ld tape blocks.\n", tapesize); 335 } else { 336 double fetapes; 337 338 if (blocksperfile) 339 fetapes = (double) tapesize / blocksperfile; 340 else if (cartridge) { 341 /* Estimate number of tapes, assuming streaming stops at 342 the end of each block written, and not in mid-block. 343 Assume no erroneous blocks; this can be compensated 344 for with an artificially low tape size. */ 345 fetapes = 346 ( tapesize /* blocks */ 347 * TP_BSIZE /* bytes/block */ 348 * (1.0/density) /* 0.1" / byte */ 349 + 350 tapesize /* blocks */ 351 * (1.0/ntrec) /* streaming-stops per block */ 352 * 15.48 /* 0.1" / streaming-stop */ 353 ) * (1.0 / tsize ); /* tape / 0.1" */ 354 } else { 355 /* Estimate number of tapes, for old fashioned 9-track 356 tape */ 357 int tenthsperirg = (density == 625) ? 3 : 7; 358 fetapes = 359 ( tapesize /* blocks */ 360 * TP_BSIZE /* bytes / block */ 361 * (1.0/density) /* 0.1" / byte */ 362 + 363 tapesize /* blocks */ 364 * (1.0/ntrec) /* IRG's / block */ 365 * tenthsperirg /* 0.1" / IRG */ 366 ) * (1.0 / tsize ); /* tape / 0.1" */ 367 } 368 etapes = fetapes; /* truncating assignment */ 369 etapes++; 370 /* count the dumped inodes map on each additional tape */ 371 tapesize += (etapes - 1) * 372 (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 373 tapesize += etapes + 10; /* headers + 10 trailer blks */ 374 msg("estimated %ld tape blocks on %3.2f tape(s).\n", 375 tapesize, fetapes); 376 } 377 378 /* 379 * Allocate tape buffer. 380 */ 381 if (!alloctape()) 382 quit("can't allocate tape buffers - try a smaller blocking factor.\n"); 383 384 startnewtape(1); 385 (void)time((time_t *)&(tstart_writing)); 386 dumpmap(usedinomap, TS_CLRI, maxino - 1); 387 388 msg("dumping (Pass III) [directories]\n"); 389 dirty = 0; /* XXX just to get gcc to shut up */ 390 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) { 391 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */ 392 dirty = *map++; 393 else 394 dirty >>= 1; 395 if ((dirty & 1) == 0) 396 continue; 397 /* 398 * Skip directory inodes deleted and maybe reallocated 399 */ 400 dp = getino(ino); 401 if ((dp->di_mode & IFMT) != IFDIR) 402 continue; 403 (void)dumpino(dp, ino); 404 } 405 406 msg("dumping (Pass IV) [regular files]\n"); 407 for (map = dumpinomap, ino = 1; ino < maxino; ino++) { 408 int mode; 409 410 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */ 411 dirty = *map++; 412 else 413 dirty >>= 1; 414 if ((dirty & 1) == 0) 415 continue; 416 /* 417 * Skip inodes deleted and reallocated as directories. 418 */ 419 dp = getino(ino); 420 mode = dp->di_mode & IFMT; 421 if (mode == IFDIR) 422 continue; 423 (void)dumpino(dp, ino); 424 } 425 426 spcl.c_type = TS_END; 427 for (i = 0; i < ntrec; i++) 428 writeheader(maxino - 1); 429 if (pipeout) 430 msg("DUMP: %ld tape blocks\n",spcl.c_tapea); 431 else 432 msg("DUMP: %ld tape blocks on %d volumes(s)\n", 433 spcl.c_tapea, spcl.c_volume); 434 putdumptime(); 435 trewind(); 436 broadcast("DUMP IS DONE!\7\7\n"); 437 msg("DUMP IS DONE\n"); 438 Exit(X_FINOK); 439 /* NOTREACHED */ 440 } 441 442 static void 443 usage() 444 { 445 446 (void)fprintf(stderr, "usage: dump [-0123456789cnu] [-B records] [-b blocksize] [-d density] [-f file]\n [-h level] [-s feet] [-T date] filesystem\n"); 447 (void)fprintf(stderr, " dump [-W | -w]\n"); 448 exit(1); 449 } 450 451 /* 452 * Pick up a numeric argument. It must be nonnegative and in the given 453 * range (except that a vmax of 0 means unlimited). 454 */ 455 static long 456 numarg(meaning, vmin, vmax) 457 char *meaning; 458 long vmin, vmax; 459 { 460 char *p; 461 long val; 462 463 val = strtol(optarg, &p, 10); 464 if (*p) 465 errx(1, "illegal %s -- %s", meaning, optarg); 466 if (val < vmin || (vmax && val > vmax)) 467 errx(1, "%s must be between %ld and %ld", meaning, vmin, vmax); 468 return (val); 469 } 470 471 void 472 sig(signo) 473 int signo; 474 { 475 switch(signo) { 476 case SIGALRM: 477 case SIGBUS: 478 case SIGFPE: 479 case SIGHUP: 480 case SIGTERM: 481 case SIGTRAP: 482 if (pipeout) 483 quit("Signal on pipe: cannot recover\n"); 484 msg("Rewriting attempted as response to unknown signal.\n"); 485 (void)fflush(stderr); 486 (void)fflush(stdout); 487 close_rewind(); 488 exit(X_REWRITE); 489 /* NOTREACHED */ 490 case SIGSEGV: 491 msg("SIGSEGV: ABORTING!\n"); 492 (void)signal(SIGSEGV, SIG_DFL); 493 (void)kill(0, SIGSEGV); 494 /* NOTREACHED */ 495 } 496 } 497 498 char * 499 rawname(cp) 500 char *cp; 501 { 502 static char rawbuf[MAXPATHLEN]; 503 char *dp = strrchr(cp, '/'); 504 505 if (dp == NULL) 506 return (NULL); 507 *dp = '\0'; 508 (void)strcpy(rawbuf, cp); 509 *dp = '/'; 510 (void)strcat(rawbuf, "/r"); 511 (void)strcat(rawbuf, dp + 1); 512 return (rawbuf); 513 } 514 515 /* 516 * obsolete -- 517 * Change set of key letters and ordered arguments into something 518 * getopt(3) will like. 519 */ 520 static void 521 obsolete(argcp, argvp) 522 int *argcp; 523 char **argvp[]; 524 { 525 int argc, flags; 526 char *ap, **argv, *flagsp, **nargv, *p; 527 528 /* Setup. */ 529 argv = *argvp; 530 argc = *argcp; 531 532 /* Return if no arguments or first argument has leading dash. */ 533 ap = argv[1]; 534 if (argc == 1 || *ap == '-') 535 return; 536 537 /* Allocate space for new arguments. */ 538 if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL || 539 (p = flagsp = malloc(strlen(ap) + 2)) == NULL) 540 err(1, NULL); 541 542 *nargv++ = *argv; 543 argv += 2; 544 545 for (flags = 0; *ap; ++ap) { 546 switch (*ap) { 547 case 'B': 548 case 'b': 549 case 'd': 550 case 'f': 551 case 'h': 552 case 's': 553 case 'T': 554 if (*argv == NULL) { 555 warnx("option requires an argument -- %c", *ap); 556 usage(); 557 } 558 if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL) 559 err(1, NULL); 560 nargv[0][0] = '-'; 561 nargv[0][1] = *ap; 562 (void)strcpy(&nargv[0][2], *argv); 563 ++argv; 564 ++nargv; 565 break; 566 default: 567 if (!flags) { 568 *p++ = '-'; 569 flags = 1; 570 } 571 *p++ = *ap; 572 break; 573 } 574 } 575 576 /* Terminate flags. */ 577 if (flags) { 578 *p = '\0'; 579 *nargv++ = flagsp; 580 } 581 582 /* Copy remaining arguments. */ 583 while (*nargv++ = *argv++); 584 585 /* Update argument count. */ 586 *argcp = nargv - *argvp - 1; 587 } 588
Indexes created Tue Sep 23 02:09:52 GMT 2025