main.c revision 1.6
1 /* $NetBSD: main.c,v 1.6 1995/03/18 14:55:02 cgd 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 1.6 1995/03/18 14:55:02 cgd 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 tape = _PATH_DEFTAPE; 115 dumpdates = _PATH_DUMPDATES; 116 temp = _PATH_DTMP; 117 if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0) 118 quit("TP_BSIZE must be a multiple of DEV_BSIZE\n"); 119 level = '0'; 120 121 if (argc < 2) 122 usage(); 123 124 obsolete(&argc, &argv); 125 while ((ch = getopt(argc, argv, "0123456789B:b:cd:f:h:ns:T:uWw")) != -1) 126 switch (ch) { 127 /* dump level */ 128 case '0': case '1': case '2': case '3': case '4': 129 case '5': case '6': case '7': case '8': case '9': 130 level = ch; 131 break; 132 133 case 'B': /* blocks per output file */ 134 blocksperfile = numarg("blocks per file", 1L, 0L); 135 break; 136 137 case 'b': /* blocks per tape write */ 138 ntrec = numarg("blocks per write", 1L, 1000L); 139 break; 140 141 case 'c': /* Tape is cart. not 9-track */ 142 cartridge = 1; 143 break; 144 145 case 'd': /* density, in bits per inch */ 146 density = numarg("density", 10L, 327670L) / 10; 147 if (density >= 625 && !bflag) 148 ntrec = HIGHDENSITYTREC; 149 break; 150 151 case 'f': /* output file */ 152 tape = optarg; 153 break; 154 155 case 'h': 156 honorlevel = numarg("honor level", 0L, 10L); 157 break; 158 159 case 'n': /* notify operators */ 160 notify = 1; 161 break; 162 163 case 's': /* tape size, feet */ 164 tsize = numarg("tape size", 1L, 0L) * 12 * 10; 165 break; 166 167 case 'T': /* time of last dump */ 168 spcl.c_ddate = unctime(optarg); 169 if (spcl.c_ddate < 0) { 170 (void)fprintf(stderr, "bad time \"%s\"\n", 171 optarg); 172 exit(X_ABORT); 173 } 174 Tflag = 1; 175 lastlevel = '?'; 176 break; 177 178 case 'u': /* update /etc/dumpdates */ 179 uflag = 1; 180 break; 181 182 case 'W': /* what to do */ 183 case 'w': 184 lastdump(ch); 185 exit(0); /* do nothing else */ 186 187 default: 188 usage(); 189 } 190 argc -= optind; 191 argv += optind; 192 193 if (argc < 1) { 194 (void)fprintf(stderr, "Must specify disk or filesystem\n"); 195 exit(X_ABORT); 196 } 197 disk = *argv++; 198 argc--; 199 if (argc >= 1) { 200 (void)fprintf(stderr, "Unknown arguments to dump:"); 201 while (argc--) 202 (void)fprintf(stderr, " %s", *argv++); 203 (void)fprintf(stderr, "\n"); 204 exit(X_ABORT); 205 } 206 if (Tflag && uflag) { 207 (void)fprintf(stderr, 208 "You cannot use the T and u flags together.\n"); 209 exit(X_ABORT); 210 } 211 if (strcmp(tape, "-") == 0) { 212 pipeout++; 213 tape = "standard output"; 214 } 215 216 if (blocksperfile) 217 blocksperfile = blocksperfile / ntrec * ntrec; /* round down */ 218 else { 219 /* 220 * Determine how to default tape size and density 221 * 222 * density tape size 223 * 9-track 1600 bpi (160 bytes/.1") 2300 ft. 224 * 9-track 6250 bpi (625 bytes/.1") 2300 ft. 225 * cartridge 8000 bpi (100 bytes/.1") 1700 ft. 226 * (450*4 - slop) 227 */ 228 if (density == 0) 229 density = cartridge ? 100 : 160; 230 if (tsize == 0) 231 tsize = cartridge ? 1700L*120L : 2300L*120L; 232 } 233 234 if (strchr(tape, ':')) { 235 host = tape; 236 tape = strchr(host, ':'); 237 *tape++ = '\0'; 238 #ifdef RDUMP 239 if (rmthost(host) == 0) 240 exit(X_ABORT); 241 #else 242 (void)fprintf(stderr, "remote dump not enabled\n"); 243 exit(X_ABORT); 244 #endif 245 } 246 (void)setuid(getuid()); /* rmthost() is the only reason to be setuid */ 247 248 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) 249 signal(SIGHUP, sig); 250 if (signal(SIGTRAP, SIG_IGN) != SIG_IGN) 251 signal(SIGTRAP, sig); 252 if (signal(SIGFPE, SIG_IGN) != SIG_IGN) 253 signal(SIGFPE, sig); 254 if (signal(SIGBUS, SIG_IGN) != SIG_IGN) 255 signal(SIGBUS, sig); 256 if (signal(SIGSEGV, SIG_IGN) != SIG_IGN) 257 signal(SIGSEGV, sig); 258 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) 259 signal(SIGTERM, sig); 260 if (signal(SIGINT, interrupt) == SIG_IGN) 261 signal(SIGINT, SIG_IGN); 262 263 set_operators(); /* /etc/group snarfed */ 264 getfstab(); /* /etc/fstab snarfed */ 265 /* 266 * disk can be either the full special file name, 267 * the suffix of the special file name, 268 * the special name missing the leading '/', 269 * the file system name with or without the leading '/'. 270 */ 271 dt = fstabsearch(disk); 272 if (dt != NULL) { 273 disk = rawname(dt->fs_spec); 274 (void)strncpy(spcl.c_dev, dt->fs_spec, NAMELEN); 275 (void)strncpy(spcl.c_filesys, dt->fs_file, NAMELEN); 276 } else { 277 (void)strncpy(spcl.c_dev, disk, NAMELEN); 278 (void)strncpy(spcl.c_filesys, "an unlisted file system", 279 NAMELEN); 280 } 281 (void)strcpy(spcl.c_label, "none"); 282 (void)gethostname(spcl.c_host, NAMELEN); 283 spcl.c_level = level - '0'; 284 spcl.c_type = TS_TAPE; 285 if (!Tflag) 286 getdumptime(); /* /etc/dumpdates snarfed */ 287 288 msg("Date of this level %c dump: %s", level, 289 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 290 msg("Date of last level %c dump: %s", lastlevel, 291 spcl.c_ddate == 0 ? "the epoch\n" : ctime(&spcl.c_ddate)); 292 msg("Dumping %s ", disk); 293 if (dt != NULL) 294 msgtail("(%s) ", dt->fs_file); 295 if (host) 296 msgtail("to %s on host %s\n", tape, host); 297 else 298 msgtail("to %s\n", tape); 299 300 if ((diskfd = open(disk, O_RDONLY)) < 0) { 301 msg("Cannot open %s\n", disk); 302 exit(X_ABORT); 303 } 304 sync(); 305 sblock = (struct fs *)sblock_buf; 306 bread(SBOFF, (char *) sblock, SBSIZE); 307 if (sblock->fs_magic != FS_MAGIC) 308 quit("bad sblock magic number\n"); 309 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 310 dev_bshift = ffs(dev_bsize) - 1; 311 if (dev_bsize != (1 << dev_bshift)) 312 quit("dev_bsize (%d) is not a power of 2", dev_bsize); 313 tp_bshift = ffs(TP_BSIZE) - 1; 314 if (TP_BSIZE != (1 << tp_bshift)) 315 quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE); 316 #ifdef FS_44INODEFMT 317 if (sblock->fs_inodefmt >= FS_44INODEFMT) 318 spcl.c_flags |= DR_NEWINODEFMT; 319 #endif 320 maxino = sblock->fs_ipg * sblock->fs_ncg; 321 mapsize = roundup(howmany(maxino, NBBY), TP_BSIZE); 322 usedinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 323 dumpdirmap = (char *)calloc((unsigned) mapsize, sizeof(char)); 324 dumpinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 325 tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 326 327 nonodump = spcl.c_level < honorlevel; 328 329 msg("mapping (Pass I) [regular files]\n"); 330 anydirskipped = mapfiles(maxino, &tapesize); 331 332 msg("mapping (Pass II) [directories]\n"); 333 while (anydirskipped) { 334 anydirskipped = mapdirs(maxino, &tapesize); 335 } 336 337 if (pipeout) { 338 tapesize += 10; /* 10 trailer blocks */ 339 msg("estimated %ld tape blocks.\n", tapesize); 340 } else { 341 double fetapes; 342 343 if (blocksperfile) 344 fetapes = (double) tapesize / blocksperfile; 345 else if (cartridge) { 346 /* Estimate number of tapes, assuming streaming stops at 347 the end of each block written, and not in mid-block. 348 Assume no erroneous blocks; this can be compensated 349 for with an artificially low tape size. */ 350 fetapes = 351 ( tapesize /* blocks */ 352 * TP_BSIZE /* bytes/block */ 353 * (1.0/density) /* 0.1" / byte */ 354 + 355 tapesize /* blocks */ 356 * (1.0/ntrec) /* streaming-stops per block */ 357 * 15.48 /* 0.1" / streaming-stop */ 358 ) * (1.0 / tsize ); /* tape / 0.1" */ 359 } else { 360 /* Estimate number of tapes, for old fashioned 9-track 361 tape */ 362 int tenthsperirg = (density == 625) ? 3 : 7; 363 fetapes = 364 ( tapesize /* blocks */ 365 * TP_BSIZE /* bytes / block */ 366 * (1.0/density) /* 0.1" / byte */ 367 + 368 tapesize /* blocks */ 369 * (1.0/ntrec) /* IRG's / block */ 370 * tenthsperirg /* 0.1" / IRG */ 371 ) * (1.0 / tsize ); /* tape / 0.1" */ 372 } 373 etapes = fetapes; /* truncating assignment */ 374 etapes++; 375 /* count the dumped inodes map on each additional tape */ 376 tapesize += (etapes - 1) * 377 (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 378 tapesize += etapes + 10; /* headers + 10 trailer blks */ 379 msg("estimated %ld tape blocks on %3.2f tape(s).\n", 380 tapesize, fetapes); 381 } 382 383 /* 384 * Allocate tape buffer. 385 */ 386 if (!alloctape()) 387 quit("can't allocate tape buffers - try a smaller blocking factor.\n"); 388 389 startnewtape(1); 390 (void)time((time_t *)&(tstart_writing)); 391 dumpmap(usedinomap, TS_CLRI, maxino - 1); 392 393 msg("dumping (Pass III) [directories]\n"); 394 dirty = 0; /* XXX just to get gcc to shut up */ 395 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) { 396 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */ 397 dirty = *map++; 398 else 399 dirty >>= 1; 400 if ((dirty & 1) == 0) 401 continue; 402 /* 403 * Skip directory inodes deleted and maybe reallocated 404 */ 405 dp = getino(ino); 406 if ((dp->di_mode & IFMT) != IFDIR) 407 continue; 408 (void)dumpino(dp, ino); 409 } 410 411 msg("dumping (Pass IV) [regular files]\n"); 412 for (map = dumpinomap, ino = 1; ino < maxino; ino++) { 413 int mode; 414 415 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */ 416 dirty = *map++; 417 else 418 dirty >>= 1; 419 if ((dirty & 1) == 0) 420 continue; 421 /* 422 * Skip inodes deleted and reallocated as directories. 423 */ 424 dp = getino(ino); 425 mode = dp->di_mode & IFMT; 426 if (mode == IFDIR) 427 continue; 428 (void)dumpino(dp, ino); 429 } 430 431 spcl.c_type = TS_END; 432 for (i = 0; i < ntrec; i++) 433 writeheader(maxino - 1); 434 if (pipeout) 435 msg("DUMP: %ld tape blocks\n",spcl.c_tapea); 436 else 437 msg("DUMP: %ld tape blocks on %d volumes(s)\n", 438 spcl.c_tapea, spcl.c_volume); 439 putdumptime(); 440 trewind(); 441 broadcast("DUMP IS DONE!\7\7\n"); 442 msg("DUMP IS DONE\n"); 443 Exit(X_FINOK); 444 /* NOTREACHED */ 445 } 446 447 static void 448 usage() 449 { 450 451 (void)fprintf(stderr, "usage: dump [-0123456789cnu] [-B records] [-b blocksize] [-d density] [-f file]\n [-h level] [-s feet] [-T date] filesystem\n"); 452 (void)fprintf(stderr, " dump [-W | -w]\n"); 453 exit(1); 454 } 455 456 /* 457 * Pick up a numeric argument. It must be nonnegative and in the given 458 * range (except that a vmax of 0 means unlimited). 459 */ 460 static long 461 numarg(meaning, vmin, vmax) 462 char *meaning; 463 long vmin, vmax; 464 { 465 char *p; 466 long val; 467 468 val = strtol(optarg, &p, 10); 469 if (*p) 470 errx(1, "illegal %s -- %s", meaning, optarg); 471 if (val < vmin || (vmax && val > vmax)) 472 errx(1, "%s must be between %ld and %ld", meaning, vmin, vmax); 473 return (val); 474 } 475 476 void 477 sig(signo) 478 int signo; 479 { 480 switch(signo) { 481 case SIGALRM: 482 case SIGBUS: 483 case SIGFPE: 484 case SIGHUP: 485 case SIGTERM: 486 case SIGTRAP: 487 if (pipeout) 488 quit("Signal on pipe: cannot recover\n"); 489 msg("Rewriting attempted as response to unknown signal.\n"); 490 (void)fflush(stderr); 491 (void)fflush(stdout); 492 close_rewind(); 493 exit(X_REWRITE); 494 /* NOTREACHED */ 495 case SIGSEGV: 496 msg("SIGSEGV: ABORTING!\n"); 497 (void)signal(SIGSEGV, SIG_DFL); 498 (void)kill(0, SIGSEGV); 499 /* NOTREACHED */ 500 } 501 } 502 503 char * 504 rawname(cp) 505 char *cp; 506 { 507 static char rawbuf[MAXPATHLEN]; 508 char *dp = strrchr(cp, '/'); 509 510 if (dp == NULL) 511 return (NULL); 512 *dp = '\0'; 513 (void)strcpy(rawbuf, cp); 514 *dp = '/'; 515 (void)strcat(rawbuf, "/r"); 516 (void)strcat(rawbuf, dp + 1); 517 return (rawbuf); 518 } 519 520 /* 521 * obsolete -- 522 * Change set of key letters and ordered arguments into something 523 * getopt(3) will like. 524 */ 525 static void 526 obsolete(argcp, argvp) 527 int *argcp; 528 char **argvp[]; 529 { 530 int argc, flags; 531 char *ap, **argv, *flagsp, **nargv, *p; 532 533 /* Setup. */ 534 argv = *argvp; 535 argc = *argcp; 536 537 /* Return if no arguments or first argument has leading dash. */ 538 ap = argv[1]; 539 if (argc == 1 || *ap == '-') 540 return; 541 542 /* Allocate space for new arguments. */ 543 if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL || 544 (p = flagsp = malloc(strlen(ap) + 2)) == NULL) 545 err(1, NULL); 546 547 *nargv++ = *argv; 548 argv += 2; 549 550 for (flags = 0; *ap; ++ap) { 551 switch (*ap) { 552 case 'B': 553 case 'b': 554 case 'd': 555 case 'f': 556 case 'h': 557 case 's': 558 case 'T': 559 if (*argv == NULL) { 560 warnx("option requires an argument -- %c", *ap); 561 usage(); 562 } 563 if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL) 564 err(1, NULL); 565 nargv[0][0] = '-'; 566 nargv[0][1] = *ap; 567 (void)strcpy(&nargv[0][2], *argv); 568 ++argv; 569 ++nargv; 570 break; 571 default: 572 if (!flags) { 573 *p++ = '-'; 574 flags = 1; 575 } 576 *p++ = *ap; 577 break; 578 } 579 } 580 581 /* Terminate flags. */ 582 if (flags) { 583 *p = '\0'; 584 *nargv++ = flagsp; 585 } 586 587 /* Copy remaining arguments. */ 588 while (*nargv++ = *argv++); 589 590 /* Update argument count. */ 591 *argcp = nargv - *argvp - 1; 592 } 593
Indexes created Tue Sep 23 07:09:52 GMT 2025