main.c revision 1.9
1 /* $NetBSD: main.c,v 1.9 1997/02/27 06:17:23 mikel 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 1.9 1997/02/27 06:17:23 mikel 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 uid_t uid; /* real uid */ 92 uid_t euid; /* effective uid */ 93 94 static long numarg __P((char *, long, long)); 95 static void obsolete __P((int *, char **[])); 96 static void usage __P((void)); 97 98 int 99 main(argc, argv) 100 int argc; 101 char *argv[]; 102 { 103 register ino_t ino; 104 register int dirty; 105 register struct dinode *dp; 106 register struct fstab *dt; 107 register char *map; 108 register int ch; 109 int i, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1; 110 ino_t maxino; 111 112 uid = getuid(); 113 euid = geteuid(); 114 (void) seteuid(uid); 115 116 spcl.c_date = 0; 117 (void)time((time_t *)&spcl.c_date); 118 119 tsize = 0; /* Default later, based on 'c' option for cart tapes */ 120 if ((tape = getenv("TAPE")) == NULL) 121 tape = _PATH_DEFTAPE; 122 dumpdates = _PATH_DUMPDATES; 123 temp = _PATH_DTMP; 124 if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0) 125 quit("TP_BSIZE must be a multiple of DEV_BSIZE\n"); 126 level = '0'; 127 128 if (argc < 2) 129 usage(); 130 131 obsolete(&argc, &argv); 132 while ((ch = getopt(argc, argv, "0123456789B:b:cd:f:h:ns:T:uWw")) != -1) 133 switch (ch) { 134 /* dump level */ 135 case '0': case '1': case '2': case '3': case '4': 136 case '5': case '6': case '7': case '8': case '9': 137 level = ch; 138 break; 139 140 case 'B': /* blocks per output file */ 141 blocksperfile = numarg("blocks per file", 1L, 0L); 142 break; 143 144 case 'b': /* blocks per tape write */ 145 ntrec = numarg("blocks per write", 1L, 1000L); 146 bflag = 1; 147 break; 148 149 case 'c': /* Tape is cart. not 9-track */ 150 cartridge = 1; 151 break; 152 153 case 'd': /* density, in bits per inch */ 154 density = numarg("density", 10L, 327670L) / 10; 155 if (density >= 625 && !bflag) 156 ntrec = HIGHDENSITYTREC; 157 break; 158 159 case 'f': /* output file */ 160 tape = optarg; 161 break; 162 163 case 'h': 164 honorlevel = numarg("honor level", 0L, 10L); 165 break; 166 167 case 'n': /* notify operators */ 168 notify = 1; 169 break; 170 171 case 's': /* tape size, feet */ 172 tsize = numarg("tape size", 1L, 0L) * 12 * 10; 173 break; 174 175 case 'T': /* time of last dump */ 176 spcl.c_ddate = unctime(optarg); 177 if (spcl.c_ddate < 0) { 178 (void)fprintf(stderr, "bad time \"%s\"\n", 179 optarg); 180 exit(X_ABORT); 181 } 182 Tflag = 1; 183 lastlevel = '?'; 184 break; 185 186 case 'u': /* update /etc/dumpdates */ 187 uflag = 1; 188 break; 189 190 case 'W': /* what to do */ 191 case 'w': 192 lastdump(ch); 193 exit(0); /* do nothing else */ 194 195 default: 196 usage(); 197 } 198 argc -= optind; 199 argv += optind; 200 201 if (argc < 1) { 202 (void)fprintf(stderr, "Must specify disk or filesystem\n"); 203 exit(X_ABORT); 204 } 205 disk = *argv++; 206 argc--; 207 if (argc >= 1) { 208 (void)fprintf(stderr, "Unknown arguments to dump:"); 209 while (argc--) 210 (void)fprintf(stderr, " %s", *argv++); 211 (void)fprintf(stderr, "\n"); 212 exit(X_ABORT); 213 } 214 if (Tflag && uflag) { 215 (void)fprintf(stderr, 216 "You cannot use the T and u flags together.\n"); 217 exit(X_ABORT); 218 } 219 if (strcmp(tape, "-") == 0) { 220 pipeout++; 221 tape = "standard output"; 222 } 223 224 if (blocksperfile) 225 blocksperfile = blocksperfile / ntrec * ntrec; /* round down */ 226 else { 227 /* 228 * Determine how to default tape size and density 229 * 230 * density tape size 231 * 9-track 1600 bpi (160 bytes/.1") 2300 ft. 232 * 9-track 6250 bpi (625 bytes/.1") 2300 ft. 233 * cartridge 8000 bpi (100 bytes/.1") 1700 ft. 234 * (450*4 - slop) 235 */ 236 if (density == 0) 237 density = cartridge ? 100 : 160; 238 if (tsize == 0) 239 tsize = cartridge ? 1700L*120L : 2300L*120L; 240 } 241 242 if (strchr(tape, ':')) { 243 host = tape; 244 tape = strchr(host, ':'); 245 *tape++ = '\0'; 246 #ifdef RDUMP 247 if (rmthost(host) == 0) 248 exit(X_ABORT); 249 #else 250 (void)fprintf(stderr, "remote dump not enabled\n"); 251 exit(X_ABORT); 252 #endif 253 } 254 (void) setuid(uid); /* rmthost() is the only reason to be setuid */ 255 256 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) 257 signal(SIGHUP, sig); 258 if (signal(SIGTRAP, SIG_IGN) != SIG_IGN) 259 signal(SIGTRAP, sig); 260 if (signal(SIGFPE, SIG_IGN) != SIG_IGN) 261 signal(SIGFPE, sig); 262 if (signal(SIGBUS, SIG_IGN) != SIG_IGN) 263 signal(SIGBUS, sig); 264 if (signal(SIGSEGV, SIG_IGN) != SIG_IGN) 265 signal(SIGSEGV, sig); 266 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) 267 signal(SIGTERM, sig); 268 if (signal(SIGINT, interrupt) == SIG_IGN) 269 signal(SIGINT, SIG_IGN); 270 271 set_operators(); /* /etc/group snarfed */ 272 getfstab(); /* /etc/fstab snarfed */ 273 /* 274 * disk can be either the full special file name, 275 * the suffix of the special file name, 276 * the special name missing the leading '/', 277 * the file system name with or without the leading '/'. 278 */ 279 dt = fstabsearch(disk); 280 if (dt != NULL) { 281 disk = rawname(dt->fs_spec); 282 (void)strncpy(spcl.c_dev, dt->fs_spec, NAMELEN); 283 (void)strncpy(spcl.c_filesys, dt->fs_file, NAMELEN); 284 } else { 285 (void)strncpy(spcl.c_dev, disk, NAMELEN); 286 (void)strncpy(spcl.c_filesys, "an unlisted file system", 287 NAMELEN); 288 } 289 (void)strcpy(spcl.c_label, "none"); 290 (void)gethostname(spcl.c_host, NAMELEN); 291 spcl.c_level = level - '0'; 292 spcl.c_type = TS_TAPE; 293 if (!Tflag) 294 getdumptime(); /* /etc/dumpdates snarfed */ 295 296 msg("Date of this level %c dump: %s", level, 297 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 298 msg("Date of last level %c dump: %s", lastlevel, 299 spcl.c_ddate == 0 ? "the epoch\n" : ctime(&spcl.c_ddate)); 300 msg("Dumping %s ", disk); 301 if (dt != NULL) 302 msgtail("(%s) ", dt->fs_file); 303 if (host) 304 msgtail("to %s on host %s\n", tape, host); 305 else 306 msgtail("to %s\n", tape); 307 308 if ((diskfd = open(disk, O_RDONLY)) < 0) { 309 msg("Cannot open %s\n", disk); 310 exit(X_ABORT); 311 } 312 sync(); 313 sblock = (struct fs *)sblock_buf; 314 bread(SBOFF, (char *) sblock, SBSIZE); 315 if (sblock->fs_magic != FS_MAGIC) 316 quit("bad sblock magic number\n"); 317 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 318 dev_bshift = ffs(dev_bsize) - 1; 319 if (dev_bsize != (1 << dev_bshift)) 320 quit("dev_bsize (%d) is not a power of 2", dev_bsize); 321 tp_bshift = ffs(TP_BSIZE) - 1; 322 if (TP_BSIZE != (1 << tp_bshift)) 323 quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE); 324 #ifdef FS_44INODEFMT 325 if (sblock->fs_inodefmt >= FS_44INODEFMT) 326 spcl.c_flags |= DR_NEWINODEFMT; 327 #endif 328 maxino = sblock->fs_ipg * sblock->fs_ncg; 329 mapsize = roundup(howmany(maxino, NBBY), TP_BSIZE); 330 usedinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 331 dumpdirmap = (char *)calloc((unsigned) mapsize, sizeof(char)); 332 dumpinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 333 tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 334 335 nonodump = spcl.c_level < honorlevel; 336 337 msg("mapping (Pass I) [regular files]\n"); 338 anydirskipped = mapfiles(maxino, &tapesize); 339 340 msg("mapping (Pass II) [directories]\n"); 341 while (anydirskipped) { 342 anydirskipped = mapdirs(maxino, &tapesize); 343 } 344 345 if (pipeout) { 346 tapesize += 10; /* 10 trailer blocks */ 347 msg("estimated %ld tape blocks.\n", tapesize); 348 } else { 349 double fetapes; 350 351 if (blocksperfile) 352 fetapes = (double) tapesize / blocksperfile; 353 else if (cartridge) { 354 /* Estimate number of tapes, assuming streaming stops at 355 the end of each block written, and not in mid-block. 356 Assume no erroneous blocks; this can be compensated 357 for with an artificially low tape size. */ 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) /* streaming-stops per block */ 365 * 15.48 /* 0.1" / streaming-stop */ 366 ) * (1.0 / tsize ); /* tape / 0.1" */ 367 } else { 368 /* Estimate number of tapes, for old fashioned 9-track 369 tape */ 370 int tenthsperirg = (density == 625) ? 3 : 7; 371 fetapes = 372 ( tapesize /* blocks */ 373 * TP_BSIZE /* bytes / block */ 374 * (1.0/density) /* 0.1" / byte */ 375 + 376 tapesize /* blocks */ 377 * (1.0/ntrec) /* IRG's / block */ 378 * tenthsperirg /* 0.1" / IRG */ 379 ) * (1.0 / tsize ); /* tape / 0.1" */ 380 } 381 etapes = fetapes; /* truncating assignment */ 382 etapes++; 383 /* count the dumped inodes map on each additional tape */ 384 tapesize += (etapes - 1) * 385 (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 386 tapesize += etapes + 10; /* headers + 10 trailer blks */ 387 msg("estimated %ld tape blocks on %3.2f tape(s).\n", 388 tapesize, fetapes); 389 } 390 391 /* 392 * Allocate tape buffer. 393 */ 394 if (!alloctape()) 395 quit("can't allocate tape buffers - try a smaller blocking factor.\n"); 396 397 startnewtape(1); 398 (void)time((time_t *)&(tstart_writing)); 399 dumpmap(usedinomap, TS_CLRI, maxino - 1); 400 401 msg("dumping (Pass III) [directories]\n"); 402 dirty = 0; /* XXX just to get gcc to shut up */ 403 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) { 404 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */ 405 dirty = *map++; 406 else 407 dirty >>= 1; 408 if ((dirty & 1) == 0) 409 continue; 410 /* 411 * Skip directory inodes deleted and maybe reallocated 412 */ 413 dp = getino(ino); 414 if ((dp->di_mode & IFMT) != IFDIR) 415 continue; 416 (void)dumpino(dp, ino); 417 } 418 419 msg("dumping (Pass IV) [regular files]\n"); 420 for (map = dumpinomap, ino = 1; ino < maxino; ino++) { 421 int mode; 422 423 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */ 424 dirty = *map++; 425 else 426 dirty >>= 1; 427 if ((dirty & 1) == 0) 428 continue; 429 /* 430 * Skip inodes deleted and reallocated as directories. 431 */ 432 dp = getino(ino); 433 mode = dp->di_mode & IFMT; 434 if (mode == IFDIR) 435 continue; 436 (void)dumpino(dp, ino); 437 } 438 439 spcl.c_type = TS_END; 440 for (i = 0; i < ntrec; i++) 441 writeheader(maxino - 1); 442 if (pipeout) 443 msg("DUMP: %ld tape blocks\n",spcl.c_tapea); 444 else 445 msg("DUMP: %ld tape blocks on %d volumes(s)\n", 446 spcl.c_tapea, spcl.c_volume); 447 putdumptime(); 448 trewind(); 449 broadcast("DUMP IS DONE!\7\7\n"); 450 msg("DUMP IS DONE\n"); 451 Exit(X_FINOK); 452 /* NOTREACHED */ 453 } 454 455 static void 456 usage() 457 { 458 459 (void)fprintf(stderr, "usage: dump [-0123456789cnu] [-B records] [-b blocksize] [-d density] [-f file]\n [-h level] [-s feet] [-T date] filesystem\n"); 460 (void)fprintf(stderr, " dump [-W | -w]\n"); 461 exit(1); 462 } 463 464 /* 465 * Pick up a numeric argument. It must be nonnegative and in the given 466 * range (except that a vmax of 0 means unlimited). 467 */ 468 static long 469 numarg(meaning, vmin, vmax) 470 char *meaning; 471 long vmin, vmax; 472 { 473 char *p; 474 long val; 475 476 val = strtol(optarg, &p, 10); 477 if (*p) 478 errx(1, "illegal %s -- %s", meaning, optarg); 479 if (val < vmin || (vmax && val > vmax)) 480 errx(1, "%s must be between %ld and %ld", meaning, vmin, vmax); 481 return (val); 482 } 483 484 void 485 sig(signo) 486 int signo; 487 { 488 switch(signo) { 489 case SIGALRM: 490 case SIGBUS: 491 case SIGFPE: 492 case SIGHUP: 493 case SIGTERM: 494 case SIGTRAP: 495 if (pipeout) 496 quit("Signal on pipe: cannot recover\n"); 497 msg("Rewriting attempted as response to unknown signal.\n"); 498 (void)fflush(stderr); 499 (void)fflush(stdout); 500 close_rewind(); 501 exit(X_REWRITE); 502 /* NOTREACHED */ 503 case SIGSEGV: 504 msg("SIGSEGV: ABORTING!\n"); 505 (void)signal(SIGSEGV, SIG_DFL); 506 (void)kill(0, SIGSEGV); 507 /* NOTREACHED */ 508 } 509 } 510 511 char * 512 rawname(cp) 513 char *cp; 514 { 515 static char rawbuf[MAXPATHLEN]; 516 char *dp = strrchr(cp, '/'); 517 518 if (dp == NULL) 519 return (NULL); 520 *dp = '\0'; 521 (void)strcpy(rawbuf, cp); 522 *dp = '/'; 523 (void)strcat(rawbuf, "/r"); 524 (void)strcat(rawbuf, dp + 1); 525 return (rawbuf); 526 } 527 528 /* 529 * obsolete -- 530 * Change set of key letters and ordered arguments into something 531 * getopt(3) will like. 532 */ 533 static void 534 obsolete(argcp, argvp) 535 int *argcp; 536 char **argvp[]; 537 { 538 int argc, flags; 539 char *ap, **argv, *flagsp, **nargv, *p; 540 541 /* Setup. */ 542 argv = *argvp; 543 argc = *argcp; 544 545 /* Return if no arguments or first argument has leading dash. */ 546 ap = argv[1]; 547 if (argc == 1 || *ap == '-') 548 return; 549 550 /* Allocate space for new arguments. */ 551 if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL || 552 (p = flagsp = malloc(strlen(ap) + 2)) == NULL) 553 err(1, NULL); 554 555 *nargv++ = *argv; 556 argv += 2; 557 558 for (flags = 0; *ap; ++ap) { 559 switch (*ap) { 560 case 'B': 561 case 'b': 562 case 'd': 563 case 'f': 564 case 'h': 565 case 's': 566 case 'T': 567 if (*argv == NULL) { 568 warnx("option requires an argument -- %c", *ap); 569 usage(); 570 } 571 if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL) 572 err(1, NULL); 573 nargv[0][0] = '-'; 574 nargv[0][1] = *ap; 575 (void)strcpy(&nargv[0][2], *argv); 576 ++argv; 577 ++nargv; 578 break; 579 default: 580 if (!flags) { 581 *p++ = '-'; 582 flags = 1; 583 } 584 *p++ = *ap; 585 break; 586 } 587 } 588 589 /* Terminate flags. */ 590 if (flags) { 591 *p = '\0'; 592 *nargv++ = flagsp; 593 } 594 595 /* Copy remaining arguments. */ 596 while (*nargv++ = *argv++); 597 598 /* Update argument count. */ 599 *argcp = nargv - *argvp - 1; 600 } 601
Indexes created Thu Oct 16 14:10:15 GMT 2025