main.c revision 1.7
1 /* $NetBSD: main.c,v 1.7 1996/02/05 23:59:40 mrg Exp $ */ 2 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 static char copyright[] = 38 "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)main.c 8.4 (Berkeley) 4/15/94"; 45 #else 46 static char rcsid[] = "$NetBSD: main.c,v 1.7 1996/02/05 23:59:40 mrg Exp $"; 47 #endif 48 #endif /* not lint */ 49 50 #include <sys/param.h> 51 #include <sys/time.h> 52 #ifdef sunos 53 #include <sys/vnode.h> 54 55 #include <ufs/inode.h> 56 #include <ufs/fs.h> 57 #else 58 #include <ufs/ffs/fs.h> 59 #include <ufs/ufs/dinode.h> 60 #endif 61 62 #include <protocols/dumprestore.h> 63 64 #include <ctype.h> 65 #include <err.h> 66 #include <errno.h> 67 #include <fcntl.h> 68 #include <fstab.h> 69 #include <signal.h> 70 #include <stdio.h> 71 #include <stdlib.h> 72 #include <string.h> 73 #include <unistd.h> 74 75 #include "dump.h" 76 #include "pathnames.h" 77 78 #ifndef SBOFF 79 #define SBOFF (SBLOCK * DEV_BSIZE) 80 #endif 81 82 int notify = 0; /* notify operator flag */ 83 int blockswritten = 0; /* number of blocks written on current tape */ 84 int tapeno = 0; /* current tape number */ 85 int density = 0; /* density in bytes/0.1" */ 86 int ntrec = NTREC; /* # tape blocks in each tape record */ 87 int cartridge = 0; /* Assume non-cartridge tape */ 88 long dev_bsize = 1; /* recalculated below */ 89 long blocksperfile; /* output blocks per file */ 90 char *host = NULL; /* remote host (if any) */ 91 92 static long numarg __P((char *, long, long)); 93 static void obsolete __P((int *, char **[])); 94 static void usage __P((void)); 95 96 int 97 main(argc, argv) 98 int argc; 99 char *argv[]; 100 { 101 register ino_t ino; 102 register int dirty; 103 register struct dinode *dp; 104 register struct fstab *dt; 105 register char *map; 106 register int ch; 107 int i, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1; 108 ino_t maxino; 109 110 spcl.c_date = 0; 111 (void)time((time_t *)&spcl.c_date); 112 113 tsize = 0; /* Default later, based on 'c' option for cart tapes */ 114 if ((tape = getenv("TAPE")) == NULL) 115 tape = _PATH_DEFTAPE; 116 dumpdates = _PATH_DUMPDATES; 117 temp = _PATH_DTMP; 118 if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0) 119 quit("TP_BSIZE must be a multiple of DEV_BSIZE\n"); 120 level = '0'; 121 122 if (argc < 2) 123 usage(); 124 125 obsolete(&argc, &argv); 126 while ((ch = getopt(argc, argv, "0123456789B:b:cd:f:h:ns:T:uWw")) != -1) 127 switch (ch) { 128 /* dump level */ 129 case '0': case '1': case '2': case '3': case '4': 130 case '5': case '6': case '7': case '8': case '9': 131 level = ch; 132 break; 133 134 case 'B': /* blocks per output file */ 135 blocksperfile = numarg("blocks per file", 1L, 0L); 136 break; 137 138 case 'b': /* blocks per tape write */ 139 ntrec = numarg("blocks per write", 1L, 1000L); 140 break; 141 142 case 'c': /* Tape is cart. not 9-track */ 143 cartridge = 1; 144 break; 145 146 case 'd': /* density, in bits per inch */ 147 density = numarg("density", 10L, 327670L) / 10; 148 if (density >= 625 && !bflag) 149 ntrec = HIGHDENSITYTREC; 150 break; 151 152 case 'f': /* output file */ 153 tape = optarg; 154 break; 155 156 case 'h': 157 honorlevel = numarg("honor level", 0L, 10L); 158 break; 159 160 case 'n': /* notify operators */ 161 notify = 1; 162 break; 163 164 case 's': /* tape size, feet */ 165 tsize = numarg("tape size", 1L, 0L) * 12 * 10; 166 break; 167 168 case 'T': /* time of last dump */ 169 spcl.c_ddate = unctime(optarg); 170 if (spcl.c_ddate < 0) { 171 (void)fprintf(stderr, "bad time \"%s\"\n", 172 optarg); 173 exit(X_ABORT); 174 } 175 Tflag = 1; 176 lastlevel = '?'; 177 break; 178 179 case 'u': /* update /etc/dumpdates */ 180 uflag = 1; 181 break; 182 183 case 'W': /* what to do */ 184 case 'w': 185 lastdump(ch); 186 exit(0); /* do nothing else */ 187 188 default: 189 usage(); 190 } 191 argc -= optind; 192 argv += optind; 193 194 if (argc < 1) { 195 (void)fprintf(stderr, "Must specify disk or filesystem\n"); 196 exit(X_ABORT); 197 } 198 disk = *argv++; 199 argc--; 200 if (argc >= 1) { 201 (void)fprintf(stderr, "Unknown arguments to dump:"); 202 while (argc--) 203 (void)fprintf(stderr, " %s", *argv++); 204 (void)fprintf(stderr, "\n"); 205 exit(X_ABORT); 206 } 207 if (Tflag && uflag) { 208 (void)fprintf(stderr, 209 "You cannot use the T and u flags together.\n"); 210 exit(X_ABORT); 211 } 212 if (strcmp(tape, "-") == 0) { 213 pipeout++; 214 tape = "standard output"; 215 } 216 217 if (blocksperfile) 218 blocksperfile = blocksperfile / ntrec * ntrec; /* round down */ 219 else { 220 /* 221 * Determine how to default tape size and density 222 * 223 * density tape size 224 * 9-track 1600 bpi (160 bytes/.1") 2300 ft. 225 * 9-track 6250 bpi (625 bytes/.1") 2300 ft. 226 * cartridge 8000 bpi (100 bytes/.1") 1700 ft. 227 * (450*4 - slop) 228 */ 229 if (density == 0) 230 density = cartridge ? 100 : 160; 231 if (tsize == 0) 232 tsize = cartridge ? 1700L*120L : 2300L*120L; 233 } 234 235 if (strchr(tape, ':')) { 236 host = tape; 237 tape = strchr(host, ':'); 238 *tape++ = '\0'; 239 #ifdef RDUMP 240 if (rmthost(host) == 0) 241 exit(X_ABORT); 242 #else 243 (void)fprintf(stderr, "remote dump not enabled\n"); 244 exit(X_ABORT); 245 #endif 246 } 247 (void)setuid(getuid()); /* rmthost() is the only reason to be setuid */ 248 249 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) 250 signal(SIGHUP, sig); 251 if (signal(SIGTRAP, SIG_IGN) != SIG_IGN) 252 signal(SIGTRAP, sig); 253 if (signal(SIGFPE, SIG_IGN) != SIG_IGN) 254 signal(SIGFPE, sig); 255 if (signal(SIGBUS, SIG_IGN) != SIG_IGN) 256 signal(SIGBUS, sig); 257 if (signal(SIGSEGV, SIG_IGN) != SIG_IGN) 258 signal(SIGSEGV, sig); 259 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) 260 signal(SIGTERM, sig); 261 if (signal(SIGINT, interrupt) == SIG_IGN) 262 signal(SIGINT, SIG_IGN); 263 264 set_operators(); /* /etc/group snarfed */ 265 getfstab(); /* /etc/fstab snarfed */ 266 /* 267 * disk can be either the full special file name, 268 * the suffix of the special file name, 269 * the special name missing the leading '/', 270 * the file system name with or without the leading '/'. 271 */ 272 dt = fstabsearch(disk); 273 if (dt != NULL) { 274 disk = rawname(dt->fs_spec); 275 (void)strncpy(spcl.c_dev, dt->fs_spec, NAMELEN); 276 (void)strncpy(spcl.c_filesys, dt->fs_file, NAMELEN); 277 } else { 278 (void)strncpy(spcl.c_dev, disk, NAMELEN); 279 (void)strncpy(spcl.c_filesys, "an unlisted file system", 280 NAMELEN); 281 } 282 (void)strcpy(spcl.c_label, "none"); 283 (void)gethostname(spcl.c_host, NAMELEN); 284 spcl.c_level = level - '0'; 285 spcl.c_type = TS_TAPE; 286 if (!Tflag) 287 getdumptime(); /* /etc/dumpdates snarfed */ 288 289 msg("Date of this level %c dump: %s", level, 290 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 291 msg("Date of last level %c dump: %s", lastlevel, 292 spcl.c_ddate == 0 ? "the epoch\n" : ctime(&spcl.c_ddate)); 293 msg("Dumping %s ", disk); 294 if (dt != NULL) 295 msgtail("(%s) ", dt->fs_file); 296 if (host) 297 msgtail("to %s on host %s\n", tape, host); 298 else 299 msgtail("to %s\n", tape); 300 301 if ((diskfd = open(disk, O_RDONLY)) < 0) { 302 msg("Cannot open %s\n", disk); 303 exit(X_ABORT); 304 } 305 sync(); 306 sblock = (struct fs *)sblock_buf; 307 bread(SBOFF, (char *) sblock, SBSIZE); 308 if (sblock->fs_magic != FS_MAGIC) 309 quit("bad sblock magic number\n"); 310 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 311 dev_bshift = ffs(dev_bsize) - 1; 312 if (dev_bsize != (1 << dev_bshift)) 313 quit("dev_bsize (%d) is not a power of 2", dev_bsize); 314 tp_bshift = ffs(TP_BSIZE) - 1; 315 if (TP_BSIZE != (1 << tp_bshift)) 316 quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE); 317 #ifdef FS_44INODEFMT 318 if (sblock->fs_inodefmt >= FS_44INODEFMT) 319 spcl.c_flags |= DR_NEWINODEFMT; 320 #endif 321 maxino = sblock->fs_ipg * sblock->fs_ncg; 322 mapsize = roundup(howmany(maxino, NBBY), TP_BSIZE); 323 usedinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 324 dumpdirmap = (char *)calloc((unsigned) mapsize, sizeof(char)); 325 dumpinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 326 tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 327 328 nonodump = spcl.c_level < honorlevel; 329 330 msg("mapping (Pass I) [regular files]\n"); 331 anydirskipped = mapfiles(maxino, &tapesize); 332 333 msg("mapping (Pass II) [directories]\n"); 334 while (anydirskipped) { 335 anydirskipped = mapdirs(maxino, &tapesize); 336 } 337 338 if (pipeout) { 339 tapesize += 10; /* 10 trailer blocks */ 340 msg("estimated %ld tape blocks.\n", tapesize); 341 } else { 342 double fetapes; 343 344 if (blocksperfile) 345 fetapes = (double) tapesize / blocksperfile; 346 else if (cartridge) { 347 /* Estimate number of tapes, assuming streaming stops at 348 the end of each block written, and not in mid-block. 349 Assume no erroneous blocks; this can be compensated 350 for with an artificially low tape size. */ 351 fetapes = 352 ( tapesize /* blocks */ 353 * TP_BSIZE /* bytes/block */ 354 * (1.0/density) /* 0.1" / byte */ 355 + 356 tapesize /* blocks */ 357 * (1.0/ntrec) /* streaming-stops per block */ 358 * 15.48 /* 0.1" / streaming-stop */ 359 ) * (1.0 / tsize ); /* tape / 0.1" */ 360 } else { 361 /* Estimate number of tapes, for old fashioned 9-track 362 tape */ 363 int tenthsperirg = (density == 625) ? 3 : 7; 364 fetapes = 365 ( tapesize /* blocks */ 366 * TP_BSIZE /* bytes / block */ 367 * (1.0/density) /* 0.1" / byte */ 368 + 369 tapesize /* blocks */ 370 * (1.0/ntrec) /* IRG's / block */ 371 * tenthsperirg /* 0.1" / IRG */ 372 ) * (1.0 / tsize ); /* tape / 0.1" */ 373 } 374 etapes = fetapes; /* truncating assignment */ 375 etapes++; 376 /* count the dumped inodes map on each additional tape */ 377 tapesize += (etapes - 1) * 378 (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 379 tapesize += etapes + 10; /* headers + 10 trailer blks */ 380 msg("estimated %ld tape blocks on %3.2f tape(s).\n", 381 tapesize, fetapes); 382 } 383 384 /* 385 * Allocate tape buffer. 386 */ 387 if (!alloctape()) 388 quit("can't allocate tape buffers - try a smaller blocking factor.\n"); 389 390 startnewtape(1); 391 (void)time((time_t *)&(tstart_writing)); 392 dumpmap(usedinomap, TS_CLRI, maxino - 1); 393 394 msg("dumping (Pass III) [directories]\n"); 395 dirty = 0; /* XXX just to get gcc to shut up */ 396 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) { 397 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */ 398 dirty = *map++; 399 else 400 dirty >>= 1; 401 if ((dirty & 1) == 0) 402 continue; 403 /* 404 * Skip directory inodes deleted and maybe reallocated 405 */ 406 dp = getino(ino); 407 if ((dp->di_mode & IFMT) != IFDIR) 408 continue; 409 (void)dumpino(dp, ino); 410 } 411 412 msg("dumping (Pass IV) [regular files]\n"); 413 for (map = dumpinomap, ino = 1; ino < maxino; ino++) { 414 int mode; 415 416 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */ 417 dirty = *map++; 418 else 419 dirty >>= 1; 420 if ((dirty & 1) == 0) 421 continue; 422 /* 423 * Skip inodes deleted and reallocated as directories. 424 */ 425 dp = getino(ino); 426 mode = dp->di_mode & IFMT; 427 if (mode == IFDIR) 428 continue; 429 (void)dumpino(dp, ino); 430 } 431 432 spcl.c_type = TS_END; 433 for (i = 0; i < ntrec; i++) 434 writeheader(maxino - 1); 435 if (pipeout) 436 msg("DUMP: %ld tape blocks\n",spcl.c_tapea); 437 else 438 msg("DUMP: %ld tape blocks on %d volumes(s)\n", 439 spcl.c_tapea, spcl.c_volume); 440 putdumptime(); 441 trewind(); 442 broadcast("DUMP IS DONE!\7\7\n"); 443 msg("DUMP IS DONE\n"); 444 Exit(X_FINOK); 445 /* NOTREACHED */ 446 } 447 448 static void 449 usage() 450 { 451 452 (void)fprintf(stderr, "usage: dump [-0123456789cnu] [-B records] [-b blocksize] [-d density] [-f file]\n [-h level] [-s feet] [-T date] filesystem\n"); 453 (void)fprintf(stderr, " dump [-W | -w]\n"); 454 exit(1); 455 } 456 457 /* 458 * Pick up a numeric argument. It must be nonnegative and in the given 459 * range (except that a vmax of 0 means unlimited). 460 */ 461 static long 462 numarg(meaning, vmin, vmax) 463 char *meaning; 464 long vmin, vmax; 465 { 466 char *p; 467 long val; 468 469 val = strtol(optarg, &p, 10); 470 if (*p) 471 errx(1, "illegal %s -- %s", meaning, optarg); 472 if (val < vmin || (vmax && val > vmax)) 473 errx(1, "%s must be between %ld and %ld", meaning, vmin, vmax); 474 return (val); 475 } 476 477 void 478 sig(signo) 479 int signo; 480 { 481 switch(signo) { 482 case SIGALRM: 483 case SIGBUS: 484 case SIGFPE: 485 case SIGHUP: 486 case SIGTERM: 487 case SIGTRAP: 488 if (pipeout) 489 quit("Signal on pipe: cannot recover\n"); 490 msg("Rewriting attempted as response to unknown signal.\n"); 491 (void)fflush(stderr); 492 (void)fflush(stdout); 493 close_rewind(); 494 exit(X_REWRITE); 495 /* NOTREACHED */ 496 case SIGSEGV: 497 msg("SIGSEGV: ABORTING!\n"); 498 (void)signal(SIGSEGV, SIG_DFL); 499 (void)kill(0, SIGSEGV); 500 /* NOTREACHED */ 501 } 502 } 503 504 char * 505 rawname(cp) 506 char *cp; 507 { 508 static char rawbuf[MAXPATHLEN]; 509 char *dp = strrchr(cp, '/'); 510 511 if (dp == NULL) 512 return (NULL); 513 *dp = '\0'; 514 (void)strcpy(rawbuf, cp); 515 *dp = '/'; 516 (void)strcat(rawbuf, "/r"); 517 (void)strcat(rawbuf, dp + 1); 518 return (rawbuf); 519 } 520 521 /* 522 * obsolete -- 523 * Change set of key letters and ordered arguments into something 524 * getopt(3) will like. 525 */ 526 static void 527 obsolete(argcp, argvp) 528 int *argcp; 529 char **argvp[]; 530 { 531 int argc, flags; 532 char *ap, **argv, *flagsp, **nargv, *p; 533 534 /* Setup. */ 535 argv = *argvp; 536 argc = *argcp; 537 538 /* Return if no arguments or first argument has leading dash. */ 539 ap = argv[1]; 540 if (argc == 1 || *ap == '-') 541 return; 542 543 /* Allocate space for new arguments. */ 544 if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL || 545 (p = flagsp = malloc(strlen(ap) + 2)) == NULL) 546 err(1, NULL); 547 548 *nargv++ = *argv; 549 argv += 2; 550 551 for (flags = 0; *ap; ++ap) { 552 switch (*ap) { 553 case 'B': 554 case 'b': 555 case 'd': 556 case 'f': 557 case 'h': 558 case 's': 559 case 'T': 560 if (*argv == NULL) { 561 warnx("option requires an argument -- %c", *ap); 562 usage(); 563 } 564 if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL) 565 err(1, NULL); 566 nargv[0][0] = '-'; 567 nargv[0][1] = *ap; 568 (void)strcpy(&nargv[0][2], *argv); 569 ++argv; 570 ++nargv; 571 break; 572 default: 573 if (!flags) { 574 *p++ = '-'; 575 flags = 1; 576 } 577 *p++ = *ap; 578 break; 579 } 580 } 581 582 /* Terminate flags. */ 583 if (flags) { 584 *p = '\0'; 585 *nargv++ = flagsp; 586 } 587 588 /* Copy remaining arguments. */ 589 while (*nargv++ = *argv++); 590 591 /* Update argument count. */ 592 *argcp = nargv - *argvp - 1; 593 } 594
Indexes created Tue Sep 23 07:09:52 GMT 2025