1 /*- 2 * Copyright (c) 1980, 1991, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char copyright[] = 10 "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 11 The Regents of the University of California. All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 05/01/95"; 16 #endif /* not lint */ 17 18 #include <sys/param.h> 19 #include <sys/time.h> 20 #ifdef sunos 21 #include <sys/vnode.h> 22 23 #include <ufs/inode.h> 24 #include <ufs/fs.h> 25 #else 26 #include <ufs/ufs/dinode.h> 27 #include <ufs/ffs/fs.h> 28 #endif 29 30 #include <protocols/dumprestore.h> 31 32 #include <ctype.h> 33 #include <err.h> 34 #include <errno.h> 35 #include <fcntl.h> 36 #include <fstab.h> 37 #include <signal.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <unistd.h> 42 43 #include "dump.h" 44 #include "pathnames.h" 45 46 #ifndef SBOFF 47 #define SBOFF (SBLOCK * DEV_BSIZE) 48 #endif 49 50 int notify = 0; /* notify operator flag */ 51 int blockswritten = 0; /* number of blocks written on current tape */ 52 int tapeno = 0; /* current tape number */ 53 int density = 0; /* density in bytes/0.1" */ 54 int ntrec = NTREC; /* # tape blocks in each tape record */ 55 int cartridge = 0; /* Assume non-cartridge tape */ 56 long dev_bsize = 1; /* recalculated below */ 57 long blocksperfile; /* output blocks per file */ 58 char *host = NULL; /* remote host (if any) */ 59 60 static long numarg __P((char *, long, long)); 61 static void obsolete __P((int *, char **[])); 62 static void usage __P((void)); 63 64 int 65 main(argc, argv) 66 int argc; 67 char *argv[]; 68 { 69 register ino_t ino; 70 register int dirty; 71 register struct dinode *dp; 72 register struct fstab *dt; 73 register char *map; 74 register int ch; 75 int i, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1; 76 ino_t maxino; 77 78 spcl.c_date = 0; 79 (void)time((time_t *)&spcl.c_date); 80 81 tsize = 0; /* Default later, based on 'c' option for cart tapes */ 82 tape = _PATH_DEFTAPE; 83 dumpdates = _PATH_DUMPDATES; 84 temp = _PATH_DTMP; 85 if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0) 86 quit("TP_BSIZE must be a multiple of DEV_BSIZE\n"); 87 level = '0'; 88 89 if (argc < 2) 90 usage(); 91 92 obsolete(&argc, &argv); 93 while ((ch = getopt(argc, argv, "0123456789B:b:cd:f:h:ns:T:uWw")) != -1) 94 switch (ch) { 95 /* dump level */ 96 case '0': case '1': case '2': case '3': case '4': 97 case '5': case '6': case '7': case '8': case '9': 98 level = ch; 99 break; 100 101 case 'B': /* blocks per output file */ 102 blocksperfile = numarg("blocks per file", 1L, 0L); 103 break; 104 105 case 'b': /* blocks per tape write */ 106 ntrec = numarg("blocks per write", 1L, 1000L); 107 break; 108 109 case 'c': /* Tape is cart. not 9-track */ 110 cartridge = 1; 111 break; 112 113 case 'd': /* density, in bits per inch */ 114 density = numarg("density", 10L, 327670L) / 10; 115 if (density >= 625 && !bflag) 116 ntrec = HIGHDENSITYTREC; 117 break; 118 119 case 'f': /* output file */ 120 tape = optarg; 121 break; 122 123 case 'h': 124 honorlevel = numarg("honor level", 0L, 10L); 125 break; 126 127 case 'n': /* notify operators */ 128 notify = 1; 129 break; 130 131 case 's': /* tape size, feet */ 132 tsize = numarg("tape size", 1L, 0L) * 12 * 10; 133 break; 134 135 case 'T': /* time of last dump */ 136 spcl.c_ddate = unctime(optarg); 137 if (spcl.c_ddate < 0) { 138 (void)fprintf(stderr, "bad time \"%s\"\n", 139 optarg); 140 exit(X_ABORT); 141 } 142 Tflag = 1; 143 lastlevel = '?'; 144 break; 145 146 case 'u': /* update /etc/dumpdates */ 147 uflag = 1; 148 break; 149 150 case 'W': /* what to do */ 151 case 'w': 152 lastdump(ch); 153 exit(0); /* do nothing else */ 154 155 default: 156 usage(); 157 } 158 argc -= optind; 159 argv += optind; 160 161 if (argc < 1) { 162 (void)fprintf(stderr, "Must specify disk or filesystem\n"); 163 exit(X_ABORT); 164 } 165 disk = *argv++; 166 argc--; 167 if (argc >= 1) { 168 (void)fprintf(stderr, "Unknown arguments to dump:"); 169 while (argc--) 170 (void)fprintf(stderr, " %s", *argv++); 171 (void)fprintf(stderr, "\n"); 172 exit(X_ABORT); 173 } 174 if (Tflag && uflag) { 175 (void)fprintf(stderr, 176 "You cannot use the T and u flags together.\n"); 177 exit(X_ABORT); 178 } 179 if (strcmp(tape, "-") == 0) { 180 pipeout++; 181 tape = "standard output"; 182 } 183 184 if (blocksperfile) 185 blocksperfile = blocksperfile / ntrec * ntrec; /* round down */ 186 else { 187 /* 188 * Determine how to default tape size and density 189 * 190 * density tape size 191 * 9-track 1600 bpi (160 bytes/.1") 2300 ft. 192 * 9-track 6250 bpi (625 bytes/.1") 2300 ft. 193 * cartridge 8000 bpi (100 bytes/.1") 1700 ft. 194 * (450*4 - slop) 195 */ 196 if (density == 0) 197 density = cartridge ? 100 : 160; 198 if (tsize == 0) 199 tsize = cartridge ? 1700L*120L : 2300L*120L; 200 } 201 202 if (strchr(tape, ':')) { 203 host = tape; 204 tape = strchr(host, ':'); 205 *tape++ = '\0'; 206 #ifdef RDUMP 207 if (rmthost(host) == 0) 208 exit(X_ABORT); 209 #else 210 (void)fprintf(stderr, "remote dump not enabled\n"); 211 exit(X_ABORT); 212 #endif 213 } 214 (void)setuid(getuid()); /* rmthost() is the only reason to be setuid */ 215 216 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) 217 signal(SIGHUP, sig); 218 if (signal(SIGTRAP, SIG_IGN) != SIG_IGN) 219 signal(SIGTRAP, sig); 220 if (signal(SIGFPE, SIG_IGN) != SIG_IGN) 221 signal(SIGFPE, sig); 222 if (signal(SIGBUS, SIG_IGN) != SIG_IGN) 223 signal(SIGBUS, sig); 224 if (signal(SIGSEGV, SIG_IGN) != SIG_IGN) 225 signal(SIGSEGV, sig); 226 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) 227 signal(SIGTERM, sig); 228 if (signal(SIGINT, interrupt) == SIG_IGN) 229 signal(SIGINT, SIG_IGN); 230 231 set_operators(); /* /etc/group snarfed */ 232 getfstab(); /* /etc/fstab snarfed */ 233 /* 234 * disk can be either the full special file name, 235 * the suffix of the special file name, 236 * the special name missing the leading '/', 237 * the file system name with or without the leading '/'. 238 */ 239 dt = fstabsearch(disk); 240 if (dt != NULL) { 241 disk = rawname(dt->fs_spec); 242 (void)strncpy(spcl.c_dev, dt->fs_spec, NAMELEN); 243 (void)strncpy(spcl.c_filesys, dt->fs_file, NAMELEN); 244 } else { 245 (void)strncpy(spcl.c_dev, disk, NAMELEN); 246 (void)strncpy(spcl.c_filesys, "an unlisted file system", 247 NAMELEN); 248 } 249 (void)strcpy(spcl.c_label, "none"); 250 (void)gethostname(spcl.c_host, NAMELEN); 251 spcl.c_level = level - '0'; 252 spcl.c_type = TS_TAPE; 253 if (!Tflag) 254 getdumptime(); /* /etc/dumpdates snarfed */ 255 256 msg("Date of this level %c dump: %s", level, 257 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 258 msg("Date of last level %c dump: %s", lastlevel, 259 spcl.c_ddate == 0 ? "the epoch\n" : ctime(&spcl.c_ddate)); 260 msg("Dumping %s ", disk); 261 if (dt != NULL) 262 msgtail("(%s) ", dt->fs_file); 263 if (host) 264 msgtail("to %s on host %s\n", tape, host); 265 else 266 msgtail("to %s\n", tape); 267 268 if ((diskfd = open(disk, O_RDONLY)) < 0) { 269 msg("Cannot open %s\n", disk); 270 exit(X_ABORT); 271 } 272 sync(); 273 sblock = (struct fs *)sblock_buf; 274 bread(SBOFF, (char *) sblock, SBSIZE); 275 if (sblock->fs_magic != FS_MAGIC) 276 quit("bad sblock magic number\n"); 277 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 278 dev_bshift = ffs(dev_bsize) - 1; 279 if (dev_bsize != (1 << dev_bshift)) 280 quit("dev_bsize (%d) is not a power of 2", dev_bsize); 281 tp_bshift = ffs(TP_BSIZE) - 1; 282 if (TP_BSIZE != (1 << tp_bshift)) 283 quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE); 284 #ifdef FS_44INODEFMT 285 if (sblock->fs_inodefmt >= FS_44INODEFMT) 286 spcl.c_flags |= DR_NEWINODEFMT; 287 #endif 288 maxino = sblock->fs_ipg * sblock->fs_ncg; 289 mapsize = roundup(howmany(maxino, NBBY), TP_BSIZE); 290 usedinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 291 dumpdirmap = (char *)calloc((unsigned) mapsize, sizeof(char)); 292 dumpinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 293 tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 294 295 nonodump = spcl.c_level < honorlevel; 296 297 msg("mapping (Pass I) [regular files]\n"); 298 anydirskipped = mapfiles(maxino, &tapesize); 299 300 msg("mapping (Pass II) [directories]\n"); 301 while (anydirskipped) { 302 anydirskipped = mapdirs(maxino, &tapesize); 303 } 304 305 if (pipeout) { 306 tapesize += 10; /* 10 trailer blocks */ 307 msg("estimated %ld tape blocks.\n", tapesize); 308 } else { 309 double fetapes; 310 311 if (blocksperfile) 312 fetapes = (double) tapesize / blocksperfile; 313 else if (cartridge) { 314 /* Estimate number of tapes, assuming streaming stops at 315 the end of each block written, and not in mid-block. 316 Assume no erroneous blocks; this can be compensated 317 for with an artificially low tape size. */ 318 fetapes = 319 ( tapesize /* blocks */ 320 * TP_BSIZE /* bytes/block */ 321 * (1.0/density) /* 0.1" / byte */ 322 + 323 tapesize /* blocks */ 324 * (1.0/ntrec) /* streaming-stops per block */ 325 * 15.48 /* 0.1" / streaming-stop */ 326 ) * (1.0 / tsize ); /* tape / 0.1" */ 327 } else { 328 /* Estimate number of tapes, for old fashioned 9-track 329 tape */ 330 int tenthsperirg = (density == 625) ? 3 : 7; 331 fetapes = 332 ( tapesize /* blocks */ 333 * TP_BSIZE /* bytes / block */ 334 * (1.0/density) /* 0.1" / byte */ 335 + 336 tapesize /* blocks */ 337 * (1.0/ntrec) /* IRG's / block */ 338 * tenthsperirg /* 0.1" / IRG */ 339 ) * (1.0 / tsize ); /* tape / 0.1" */ 340 } 341 etapes = fetapes; /* truncating assignment */ 342 etapes++; 343 /* count the dumped inodes map on each additional tape */ 344 tapesize += (etapes - 1) * 345 (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 346 tapesize += etapes + 10; /* headers + 10 trailer blks */ 347 msg("estimated %ld tape blocks on %3.2f tape(s).\n", 348 tapesize, fetapes); 349 } 350 351 /* 352 * Allocate tape buffer. 353 */ 354 if (!alloctape()) 355 quit("can't allocate tape buffers - try a smaller blocking factor.\n"); 356 357 startnewtape(1); 358 (void)time((time_t *)&(tstart_writing)); 359 dumpmap(usedinomap, TS_CLRI, maxino - 1); 360 361 msg("dumping (Pass III) [directories]\n"); 362 dirty = 0; /* XXX just to get gcc to shut up */ 363 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) { 364 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */ 365 dirty = *map++; 366 else 367 dirty >>= 1; 368 if ((dirty & 1) == 0) 369 continue; 370 /* 371 * Skip directory inodes deleted and maybe reallocated 372 */ 373 dp = getino(ino); 374 if ((dp->di_mode & IFMT) != IFDIR) 375 continue; 376 (void)dumpino(dp, ino); 377 } 378 379 msg("dumping (Pass IV) [regular files]\n"); 380 for (map = dumpinomap, ino = 1; ino < maxino; ino++) { 381 int mode; 382 383 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */ 384 dirty = *map++; 385 else 386 dirty >>= 1; 387 if ((dirty & 1) == 0) 388 continue; 389 /* 390 * Skip inodes deleted and reallocated as directories. 391 */ 392 dp = getino(ino); 393 mode = dp->di_mode & IFMT; 394 if (mode == IFDIR) 395 continue; 396 (void)dumpino(dp, ino); 397 } 398 399 spcl.c_type = TS_END; 400 for (i = 0; i < ntrec; i++) 401 writeheader(maxino - 1); 402 if (pipeout) 403 msg("DUMP: %ld tape blocks\n",spcl.c_tapea); 404 else 405 msg("DUMP: %ld tape blocks on %d volumes(s)\n", 406 spcl.c_tapea, spcl.c_volume); 407 putdumptime(); 408 trewind(); 409 broadcast("DUMP IS DONE!\7\7\n"); 410 msg("DUMP IS DONE\n"); 411 Exit(X_FINOK); 412 /* NOTREACHED */ 413 } 414 415 static void 416 usage() 417 { 418 419 (void)fprintf(stderr, "usage: dump [-0123456789cnu] [-B records] [-b blocksize] [-d density] [-f file]\n [-h level] [-s feet] [-T date] filesystem\n"); 420 (void)fprintf(stderr, " dump [-W | -w]\n"); 421 exit(1); 422 } 423 424 /* 425 * Pick up a numeric argument. It must be nonnegative and in the given 426 * range (except that a vmax of 0 means unlimited). 427 */ 428 static long 429 numarg(meaning, vmin, vmax) 430 char *meaning; 431 long vmin, vmax; 432 { 433 char *p; 434 long val; 435 436 val = strtol(optarg, &p, 10); 437 if (*p) 438 errx(1, "illegal %s -- %s", meaning, optarg); 439 if (val < vmin || (vmax && val > vmax)) 440 errx(1, "%s must be between %ld and %ld", meaning, vmin, vmax); 441 return (val); 442 } 443 444 void 445 sig(signo) 446 int signo; 447 { 448 switch(signo) { 449 case SIGALRM: 450 case SIGBUS: 451 case SIGFPE: 452 case SIGHUP: 453 case SIGTERM: 454 case SIGTRAP: 455 if (pipeout) 456 quit("Signal on pipe: cannot recover\n"); 457 msg("Rewriting attempted as response to unknown signal.\n"); 458 (void)fflush(stderr); 459 (void)fflush(stdout); 460 close_rewind(); 461 exit(X_REWRITE); 462 /* NOTREACHED */ 463 case SIGSEGV: 464 msg("SIGSEGV: ABORTING!\n"); 465 (void)signal(SIGSEGV, SIG_DFL); 466 (void)kill(0, SIGSEGV); 467 /* NOTREACHED */ 468 } 469 } 470 471 char * 472 rawname(cp) 473 char *cp; 474 { 475 static char rawbuf[MAXPATHLEN]; 476 char *dp = strrchr(cp, '/'); 477 478 if (dp == NULL) 479 return (NULL); 480 *dp = '\0'; 481 (void)strcpy(rawbuf, cp); 482 *dp = '/'; 483 (void)strcat(rawbuf, "/r"); 484 (void)strcat(rawbuf, dp + 1); 485 return (rawbuf); 486 } 487 488 /* 489 * obsolete -- 490 * Change set of key letters and ordered arguments into something 491 * getopt(3) will like. 492 */ 493 static void 494 obsolete(argcp, argvp) 495 int *argcp; 496 char **argvp[]; 497 { 498 int argc, flags; 499 char *ap, **argv, *flagsp, **nargv, *p; 500 501 /* Setup. */ 502 argv = *argvp; 503 argc = *argcp; 504 505 /* Return if no arguments or first argument has leading dash. */ 506 ap = argv[1]; 507 if (argc == 1 || *ap == '-') 508 return; 509 510 /* Allocate space for new arguments. */ 511 if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL || 512 (p = flagsp = malloc(strlen(ap) + 2)) == NULL) 513 err(1, NULL); 514 515 *nargv++ = *argv; 516 argv += 2; 517 518 for (flags = 0; *ap; ++ap) { 519 switch (*ap) { 520 case 'B': 521 case 'b': 522 case 'd': 523 case 'f': 524 case 'h': 525 case 's': 526 case 'T': 527 if (*argv == NULL) { 528 warnx("option requires an argument -- %c", *ap); 529 usage(); 530 } 531 if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL) 532 err(1, NULL); 533 nargv[0][0] = '-'; 534 nargv[0][1] = *ap; 535 (void)strcpy(&nargv[0][2], *argv); 536 ++argv; 537 ++nargv; 538 break; 539 default: 540 if (!flags) { 541 *p++ = '-'; 542 flags = 1; 543 } 544 *p++ = *ap; 545 break; 546 } 547 } 548 549 /* Terminate flags. */ 550 if (flags) { 551 *p = '\0'; 552 *nargv++ = flagsp; 553 } 554 555 /* Copy remaining arguments. */ 556 while (*nargv++ = *argv++); 557 558 /* Update argument count. */ 559 *argcp = nargv - *argvp - 1; 560 } 561