main.c revision 1.12
1 /* $NetBSD: main.c,v 1.12 1997/04/21 11:31:16 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 1.12 1997/04/21 11:31:16 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 <time.h> 74 #include <unistd.h> 75 76 #include "dump.h" 77 #include "pathnames.h" 78 79 #ifndef SBOFF 80 #define SBOFF (SBLOCK * DEV_BSIZE) 81 #endif 82 83 int notify = 0; /* notify operator flag */ 84 int blockswritten = 0; /* number of blocks written on current tape */ 85 int tapeno = 0; /* current tape number */ 86 int density = 0; /* density in bytes/0.1" */ 87 int ntrec = NTREC; /* # tape blocks in each tape record */ 88 int cartridge = 0; /* Assume non-cartridge tape */ 89 long dev_bsize = 1; /* recalculated below */ 90 long blocksperfile; /* output blocks per file */ 91 char *host = NULL; /* remote host (if any) */ 92 uid_t uid; /* real uid */ 93 uid_t euid; /* effective uid */ 94 95 static long numarg __P((char *, long, long)); 96 static void obsolete __P((int *, char **[])); 97 static void usage __P((void)); 98 99 int 100 main(argc, argv) 101 int argc; 102 char *argv[]; 103 { 104 ino_t ino; 105 int dirty; 106 struct dinode *dp; 107 struct fstab *dt; 108 char *map; 109 int ch; 110 int i, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1; 111 ino_t maxino; 112 time_t tnow; 113 114 uid = getuid(); 115 euid = geteuid(); 116 (void) seteuid(uid); 117 118 spcl.c_date = 0; 119 (void)time((time_t *)&spcl.c_date); 120 121 tsize = 0; /* Default later, based on 'c' option for cart tapes */ 122 if ((tape = getenv("TAPE")) == NULL) 123 tape = _PATH_DEFTAPE; 124 dumpdates = _PATH_DUMPDATES; 125 temp = _PATH_DTMP; 126 if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0) 127 quit("TP_BSIZE must be a multiple of DEV_BSIZE\n"); 128 level = '0'; 129 130 if (argc < 2) 131 usage(); 132 133 obsolete(&argc, &argv); 134 while ((ch = getopt(argc, argv, "0123456789B:b:cd:f:h:ns:T:uWw")) != -1) 135 switch (ch) { 136 /* dump level */ 137 case '0': case '1': case '2': case '3': case '4': 138 case '5': case '6': case '7': case '8': case '9': 139 level = ch; 140 break; 141 142 case 'B': /* blocks per output file */ 143 blocksperfile = numarg("blocks per file", 1L, 0L); 144 break; 145 146 case 'b': /* blocks per tape write */ 147 ntrec = numarg("blocks per write", 1L, 1000L); 148 bflag = 1; 149 break; 150 151 case 'c': /* Tape is cart. not 9-track */ 152 cartridge = 1; 153 break; 154 155 case 'd': /* density, in bits per inch */ 156 density = numarg("density", 10L, 327670L) / 10; 157 if (density >= 625 && !bflag) 158 ntrec = HIGHDENSITYTREC; 159 break; 160 161 case 'f': /* output file */ 162 tape = optarg; 163 break; 164 165 case 'h': 166 honorlevel = numarg("honor level", 0L, 10L); 167 break; 168 169 case 'n': /* notify operators */ 170 notify = 1; 171 break; 172 173 case 's': /* tape size, feet */ 174 tsize = numarg("tape size", 1L, 0L) * 12 * 10; 175 break; 176 177 case 'T': /* time of last dump */ 178 spcl.c_ddate = unctime(optarg); 179 if (spcl.c_ddate < 0) { 180 (void)fprintf(stderr, "bad time \"%s\"\n", 181 optarg); 182 exit(X_ABORT); 183 } 184 Tflag = 1; 185 lastlevel = '?'; 186 break; 187 188 case 'u': /* update /etc/dumpdates */ 189 uflag = 1; 190 break; 191 192 case 'W': /* what to do */ 193 case 'w': 194 lastdump(ch); 195 exit(0); /* do nothing else */ 196 197 default: 198 usage(); 199 } 200 argc -= optind; 201 argv += optind; 202 203 if (argc < 1) { 204 (void)fprintf(stderr, "Must specify disk or filesystem\n"); 205 exit(X_ABORT); 206 } 207 disk = *argv++; 208 argc--; 209 if (argc >= 1) { 210 (void)fprintf(stderr, "Unknown arguments to dump:"); 211 while (argc--) 212 (void)fprintf(stderr, " %s", *argv++); 213 (void)fprintf(stderr, "\n"); 214 exit(X_ABORT); 215 } 216 if (Tflag && uflag) { 217 (void)fprintf(stderr, 218 "You cannot use the T and u flags together.\n"); 219 exit(X_ABORT); 220 } 221 if (strcmp(tape, "-") == 0) { 222 pipeout++; 223 tape = "standard output"; 224 } 225 226 if (blocksperfile) 227 blocksperfile = blocksperfile / ntrec * ntrec; /* round down */ 228 else { 229 /* 230 * Determine how to default tape size and density 231 * 232 * density tape size 233 * 9-track 1600 bpi (160 bytes/.1") 2300 ft. 234 * 9-track 6250 bpi (625 bytes/.1") 2300 ft. 235 * cartridge 8000 bpi (100 bytes/.1") 1700 ft. 236 * (450*4 - slop) 237 */ 238 if (density == 0) 239 density = cartridge ? 100 : 160; 240 if (tsize == 0) 241 tsize = cartridge ? 1700L*120L : 2300L*120L; 242 } 243 244 if (strchr(tape, ':')) { 245 host = tape; 246 tape = strchr(host, ':'); 247 *tape++ = '\0'; 248 #ifdef RDUMP 249 if (rmthost(host) == 0) 250 exit(X_ABORT); 251 #else 252 (void)fprintf(stderr, "remote dump not enabled\n"); 253 exit(X_ABORT); 254 #endif 255 } 256 (void) setuid(uid); /* rmthost() is the only reason to be setuid */ 257 258 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) 259 signal(SIGHUP, sig); 260 if (signal(SIGTRAP, SIG_IGN) != SIG_IGN) 261 signal(SIGTRAP, sig); 262 if (signal(SIGFPE, SIG_IGN) != SIG_IGN) 263 signal(SIGFPE, sig); 264 if (signal(SIGBUS, SIG_IGN) != SIG_IGN) 265 signal(SIGBUS, sig); 266 if (signal(SIGSEGV, SIG_IGN) != SIG_IGN) 267 signal(SIGSEGV, sig); 268 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) 269 signal(SIGTERM, sig); 270 if (signal(SIGINT, interrupt) == SIG_IGN) 271 signal(SIGINT, SIG_IGN); 272 273 set_operators(); /* /etc/group snarfed */ 274 getfstab(); /* /etc/fstab snarfed */ 275 /* 276 * disk can be either the full special file name, 277 * the suffix of the special file name, 278 * the special name missing the leading '/', 279 * the file system name with or without the leading '/'. 280 */ 281 dt = fstabsearch(disk); 282 if (dt != NULL) { 283 disk = rawname(dt->fs_spec); 284 (void)strncpy(spcl.c_dev, dt->fs_spec, NAMELEN); 285 (void)strncpy(spcl.c_filesys, dt->fs_file, NAMELEN); 286 } else { 287 (void)strncpy(spcl.c_dev, disk, NAMELEN); 288 (void)strncpy(spcl.c_filesys, "an unlisted file system", 289 NAMELEN); 290 } 291 (void)strncpy(spcl.c_label, "none", sizeof(spcl.c_label) - 1); 292 (void)gethostname(spcl.c_host, NAMELEN); 293 spcl.c_level = level - '0'; 294 spcl.c_type = TS_TAPE; 295 if (!Tflag) 296 getdumptime(); /* /etc/dumpdates snarfed */ 297 298 msg("Date of this level %c dump: %s", level, 299 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 300 msg("Date of last level %c dump: %s", lastlevel, 301 spcl.c_ddate == 0 ? "the epoch\n" : ctime(&spcl.c_ddate)); 302 msg("Dumping %s ", disk); 303 if (dt != NULL) 304 msgtail("(%s) ", dt->fs_file); 305 if (host) 306 msgtail("to %s on host %s\n", tape, host); 307 else 308 msgtail("to %s\n", tape); 309 310 if ((diskfd = open(disk, O_RDONLY)) < 0) { 311 msg("Cannot open %s\n", disk); 312 exit(X_ABORT); 313 } 314 sync(); 315 sblock = (struct fs *)sblock_buf; 316 bread(SBOFF, (char *) sblock, SBSIZE); 317 if (sblock->fs_magic != FS_MAGIC) 318 quit("bad sblock magic number\n"); 319 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 320 dev_bshift = ffs(dev_bsize) - 1; 321 if (dev_bsize != (1 << dev_bshift)) 322 quit("dev_bsize (%d) is not a power of 2", dev_bsize); 323 tp_bshift = ffs(TP_BSIZE) - 1; 324 if (TP_BSIZE != (1 << tp_bshift)) 325 quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE); 326 #ifdef FS_44INODEFMT 327 if (sblock->fs_inodefmt >= FS_44INODEFMT) 328 spcl.c_flags |= DR_NEWINODEFMT; 329 #endif 330 maxino = sblock->fs_ipg * sblock->fs_ncg; 331 mapsize = roundup(howmany(maxino, NBBY), TP_BSIZE); 332 usedinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 333 dumpdirmap = (char *)calloc((unsigned) mapsize, sizeof(char)); 334 dumpinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 335 tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 336 337 nonodump = spcl.c_level < honorlevel; 338 339 msg("mapping (Pass I) [regular files]\n"); 340 anydirskipped = mapfiles(maxino, &tapesize); 341 342 msg("mapping (Pass II) [directories]\n"); 343 while (anydirskipped) { 344 anydirskipped = mapdirs(maxino, &tapesize); 345 } 346 347 if (pipeout) { 348 tapesize += 10; /* 10 trailer blocks */ 349 msg("estimated %ld tape blocks.\n", tapesize); 350 } else { 351 double fetapes; 352 353 if (blocksperfile) 354 fetapes = (double) tapesize / blocksperfile; 355 else if (cartridge) { 356 /* Estimate number of tapes, assuming streaming stops at 357 the end of each block written, and not in mid-block. 358 Assume no erroneous blocks; this can be compensated 359 for with an artificially low tape size. */ 360 fetapes = 361 ( tapesize /* blocks */ 362 * TP_BSIZE /* bytes/block */ 363 * (1.0/density) /* 0.1" / byte */ 364 + 365 tapesize /* blocks */ 366 * (1.0/ntrec) /* streaming-stops per block */ 367 * 15.48 /* 0.1" / streaming-stop */ 368 ) * (1.0 / tsize ); /* tape / 0.1" */ 369 } else { 370 /* Estimate number of tapes, for old fashioned 9-track 371 tape */ 372 int tenthsperirg = (density == 625) ? 3 : 7; 373 fetapes = 374 ( tapesize /* blocks */ 375 * TP_BSIZE /* bytes / block */ 376 * (1.0/density) /* 0.1" / byte */ 377 + 378 tapesize /* blocks */ 379 * (1.0/ntrec) /* IRG's / block */ 380 * tenthsperirg /* 0.1" / IRG */ 381 ) * (1.0 / tsize ); /* tape / 0.1" */ 382 } 383 etapes = fetapes; /* truncating assignment */ 384 etapes++; 385 /* count the dumped inodes map on each additional tape */ 386 tapesize += (etapes - 1) * 387 (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 388 tapesize += etapes + 10; /* headers + 10 trailer blks */ 389 msg("estimated %ld tape blocks on %3.2f tape(s).\n", 390 tapesize, fetapes); 391 } 392 393 /* 394 * Allocate tape buffer. 395 */ 396 if (!alloctape()) 397 quit("can't allocate tape buffers - try a smaller blocking factor.\n"); 398 399 startnewtape(1); 400 (void)time((time_t *)&(tstart_writing)); 401 xferrate = 0; 402 dumpmap(usedinomap, TS_CLRI, maxino - 1); 403 404 msg("dumping (Pass III) [directories]\n"); 405 dirty = 0; /* XXX just to get gcc to shut up */ 406 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) { 407 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */ 408 dirty = *map++; 409 else 410 dirty >>= 1; 411 if ((dirty & 1) == 0) 412 continue; 413 /* 414 * Skip directory inodes deleted and maybe reallocated 415 */ 416 dp = getino(ino); 417 if ((dp->di_mode & IFMT) != IFDIR) 418 continue; 419 (void)dumpino(dp, ino); 420 } 421 422 msg("dumping (Pass IV) [regular files]\n"); 423 for (map = dumpinomap, ino = 1; ino < maxino; ino++) { 424 int mode; 425 426 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */ 427 dirty = *map++; 428 else 429 dirty >>= 1; 430 if ((dirty & 1) == 0) 431 continue; 432 /* 433 * Skip inodes deleted and reallocated as directories. 434 */ 435 dp = getino(ino); 436 mode = dp->di_mode & IFMT; 437 if (mode == IFDIR) 438 continue; 439 (void)dumpino(dp, ino); 440 } 441 442 spcl.c_type = TS_END; 443 for (i = 0; i < ntrec; i++) 444 writeheader(maxino - 1); 445 if (pipeout) 446 msg("DUMP: %ld tape blocks\n",spcl.c_tapea); 447 else 448 msg("DUMP: %ld tape blocks on %d volume%s\n", 449 spcl.c_tapea, spcl.c_volume, 450 (spcl.c_volume == 1) ? "" : "s"); 451 tnow = do_stats(); 452 msg("Date of this level %c dump: %s", level, 453 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 454 msg("Date this dump completed: %s", ctime(&tnow)); 455 msg("Average transfer rate: %ldK/s\n", xferrate / tapeno); 456 putdumptime(); 457 trewind(); 458 broadcast("DUMP IS DONE!\7\7\n"); 459 msg("DUMP IS DONE\n"); 460 Exit(X_FINOK); 461 /* NOTREACHED */ 462 } 463 464 static void 465 usage() 466 { 467 468 (void)fprintf(stderr, "usage: dump [-0123456789cnu] [-B records] [-b blocksize] [-d density] [-f file]\n [-h level] [-s feet] [-T date] filesystem\n"); 469 (void)fprintf(stderr, " dump [-W | -w]\n"); 470 exit(1); 471 } 472 473 /* 474 * Pick up a numeric argument. It must be nonnegative and in the given 475 * range (except that a vmax of 0 means unlimited). 476 */ 477 static long 478 numarg(meaning, vmin, vmax) 479 char *meaning; 480 long vmin, vmax; 481 { 482 char *p; 483 long val; 484 485 val = strtol(optarg, &p, 10); 486 if (*p) 487 errx(1, "illegal %s -- %s", meaning, optarg); 488 if (val < vmin || (vmax && val > vmax)) 489 errx(1, "%s must be between %ld and %ld", meaning, vmin, vmax); 490 return (val); 491 } 492 493 void 494 sig(signo) 495 int signo; 496 { 497 switch(signo) { 498 case SIGALRM: 499 case SIGBUS: 500 case SIGFPE: 501 case SIGHUP: 502 case SIGTERM: 503 case SIGTRAP: 504 if (pipeout) 505 quit("Signal on pipe: cannot recover\n"); 506 msg("Rewriting attempted as response to unknown signal.\n"); 507 (void)fflush(stderr); 508 (void)fflush(stdout); 509 close_rewind(); 510 exit(X_REWRITE); 511 /* NOTREACHED */ 512 case SIGSEGV: 513 msg("SIGSEGV: ABORTING!\n"); 514 (void)signal(SIGSEGV, SIG_DFL); 515 (void)kill(0, SIGSEGV); 516 /* NOTREACHED */ 517 } 518 } 519 520 char * 521 rawname(cp) 522 char *cp; 523 { 524 static char rawbuf[MAXPATHLEN]; 525 char *dp = strrchr(cp, '/'); 526 527 if (dp == NULL) 528 return (NULL); 529 *dp = '\0'; 530 (void)snprintf(rawbuf, sizeof rawbuf, "%s/r%s", cp, dp + 1); 531 *dp = '/'; 532 return (rawbuf); 533 } 534 535 /* 536 * obsolete -- 537 * Change set of key letters and ordered arguments into something 538 * getopt(3) will like. 539 */ 540 static void 541 obsolete(argcp, argvp) 542 int *argcp; 543 char **argvp[]; 544 { 545 int argc, flags; 546 char *ap, **argv, *flagsp, **nargv, *p; 547 548 /* Setup. */ 549 argv = *argvp; 550 argc = *argcp; 551 552 /* Return if no arguments or first argument has leading dash. */ 553 ap = argv[1]; 554 if (argc == 1 || *ap == '-') 555 return; 556 557 /* Allocate space for new arguments. */ 558 if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL || 559 (p = flagsp = malloc(strlen(ap) + 2)) == NULL) 560 err(1, NULL); 561 562 *nargv++ = *argv; 563 argv += 2; 564 565 for (flags = 0; *ap; ++ap) { 566 switch (*ap) { 567 case 'B': 568 case 'b': 569 case 'd': 570 case 'f': 571 case 'h': 572 case 's': 573 case 'T': 574 if (*argv == NULL) { 575 warnx("option requires an argument -- %c", *ap); 576 usage(); 577 } 578 if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL) 579 err(1, NULL); 580 nargv[0][0] = '-'; 581 nargv[0][1] = *ap; 582 (void)strcpy(&nargv[0][2], *argv); /* XXX strcpy is safe */ 583 ++argv; 584 ++nargv; 585 break; 586 default: 587 if (!flags) { 588 *p++ = '-'; 589 flags = 1; 590 } 591 *p++ = *ap; 592 break; 593 } 594 } 595 596 /* Terminate flags. */ 597 if (flags) { 598 *p = '\0'; 599 *nargv++ = flagsp; 600 } 601 602 /* Copy remaining arguments. */ 603 while (*nargv++ = *argv++); 604 605 /* Update argument count. */ 606 *argcp = nargv - *argvp - 1; 607 } 608
Indexes created Mon Sep 22 13:09:51 GMT 2025