main.c revision 1.2
1 /*- 2 * Copyright (c) 1980, 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 char copyright[] = 36 "@(#) Copyright (c) 1980, 1991 The Regents of the University of California.\n\ 37 All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 /* from: static char sccsid[] = "@(#)main.c 5.24 (Berkeley) 7/16/92"; */ 42 static char *rcsid = "$Id: main.c,v 1.2 1994/03/28 01:50:05 cgd Exp $"; 43 #endif /* not lint */ 44 45 #ifdef sunos 46 #include <stdio.h> 47 #include <errno.h> 48 #include <ctype.h> 49 #include <sys/param.h> 50 #include <sys/stat.h> 51 #include <ufs/fs.h> 52 #else 53 #include <sys/param.h> 54 #include <sys/time.h> 55 #include <ufs/fs.h> 56 #endif 57 #include <ufs/dinode.h> 58 #include <protocols/dumprestore.h> 59 #include <signal.h> 60 #ifdef __STDC__ 61 #include <time.h> 62 #endif 63 #include <fcntl.h> 64 #include <fstab.h> 65 #include <stdio.h> 66 #ifdef __STDC__ 67 #include <unistd.h> 68 #include <stdlib.h> 69 #include <string.h> 70 #endif 71 #include "dump.h" 72 #include "pathnames.h" 73 74 int notify = 0; /* notify operator flag */ 75 int blockswritten = 0; /* number of blocks written on current tape */ 76 int tapeno = 0; /* current tape number */ 77 int density = 0; /* density in bytes/0.1" */ 78 int ntrec = NTREC; /* # tape blocks in each tape record */ 79 int cartridge = 0; /* Assume non-cartridge tape */ 80 long dev_bsize = 1; /* recalculated below */ 81 long blocksperfile; /* output blocks per file */ 82 char *host = NULL; /* remote host (if any) */ 83 #ifdef RDUMP 84 int rmthost(); 85 #endif 86 87 main(argc, argv) 88 int argc; 89 char **argv; 90 { 91 register ino_t ino; 92 register int dirty; 93 register struct dinode *dp; 94 register struct fstab *dt; 95 register char *map; 96 register char *cp; 97 int i, anydirskipped, bflag = 0, Tflag = 0; 98 float fetapes; 99 ino_t maxino; 100 101 spcl.c_date = 0; 102 (void) time((time_t *) &(spcl.c_date)); 103 104 tsize = 0; /* Default later, based on 'c' option for cart tapes */ 105 tape = _PATH_DEFTAPE; 106 dumpdates = _PATH_DUMPDATES; 107 temp = _PATH_DTMP; 108 if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0) 109 quit("TP_BSIZE must be a multiple of DEV_BSIZE\n"); 110 level = '0'; 111 if (argc == 1) { 112 (void) fprintf(stderr, "Must specify a key.\n"); 113 Exit(X_ABORT); 114 } 115 argv++; 116 argc -= 2; 117 for (cp = *argv++; *cp; cp++) { 118 switch (*cp) { 119 case '-': 120 continue; 121 122 case 'w': 123 lastdump('w'); /* tell us only what has to be done */ 124 (void) exit(0); 125 126 case 'W': /* what to do */ 127 lastdump('W'); /* tell us state of what is done */ 128 (void) exit(0); /* do nothing else */ 129 130 case 'f': /* output file */ 131 if (argc < 1) 132 break; 133 tape = *argv++; 134 argc--; 135 continue; 136 137 case 'd': /* density, in bits per inch */ 138 if (argc < 1) 139 break; 140 density = atoi(*argv) / 10; 141 if (density < 1) { 142 (void) fprintf(stderr, "bad density \"%s\"\n", 143 *argv); 144 Exit(X_ABORT); 145 } 146 argc--; 147 argv++; 148 if (density >= 625 && !bflag) 149 ntrec = HIGHDENSITYTREC; 150 continue; 151 152 case 's': /* tape size, feet */ 153 if (argc < 1) 154 break; 155 tsize = atol(*argv); 156 if (tsize < 1) { 157 (void) fprintf(stderr, "bad size \"%s\"\n", 158 *argv); 159 Exit(X_ABORT); 160 } 161 argc--; 162 argv++; 163 tsize *= 12 * 10; 164 continue; 165 166 case 'T': /* time of last dump */ 167 if (argc < 1) 168 break; 169 spcl.c_ddate = unctime(*argv); 170 if (spcl.c_ddate < 0) { 171 (void) fprintf(stderr, "bad time \"%s\"\n", 172 *argv); 173 Exit(X_ABORT); 174 } 175 Tflag++; 176 lastlevel = '?'; 177 argc--; 178 argv++; 179 continue; 180 181 case 'b': /* blocks per tape write */ 182 if (argc < 1) 183 break; 184 bflag++; 185 ntrec = atoi(*argv); 186 if (ntrec < 1) { 187 (void) fprintf(stderr, "%s \"%s\"\n", 188 "bad number of blocks per write ", *argv); 189 Exit(X_ABORT); 190 } 191 argc--; 192 argv++; 193 continue; 194 195 case 'B': /* blocks per output file */ 196 if (argc < 1) 197 break; 198 blocksperfile = atol(*argv); 199 if (blocksperfile < 1) { 200 (void) fprintf(stderr, "%s \"%s\"\n", 201 "bad number of blocks per file ", *argv); 202 Exit(X_ABORT); 203 } 204 argc--; 205 argv++; 206 continue; 207 208 case 'c': /* Tape is cart. not 9-track */ 209 cartridge++; 210 continue; 211 212 case '0': /* dump level */ 213 case '1': 214 case '2': 215 case '3': 216 case '4': 217 case '5': 218 case '6': 219 case '7': 220 case '8': 221 case '9': 222 level = *cp; 223 continue; 224 225 case 'u': /* update /etc/dumpdates */ 226 uflag++; 227 continue; 228 229 case 'n': /* notify operators */ 230 notify++; 231 continue; 232 233 default: 234 (void) fprintf(stderr, "bad key '%c'\n", *cp); 235 Exit(X_ABORT); 236 } 237 (void) fprintf(stderr, "missing argument to '%c'\n", *cp); 238 Exit(X_ABORT); 239 } 240 if (argc < 1) { 241 (void) fprintf(stderr, "Must specify disk or filesystem\n"); 242 Exit(X_ABORT); 243 } else { 244 disk = *argv++; 245 argc--; 246 } 247 if (argc >= 1) { 248 (void) fprintf(stderr, "Unknown arguments to dump:"); 249 while (argc--) 250 (void) fprintf(stderr, " %s", *argv++); 251 (void) fprintf(stderr, "\n"); 252 Exit(X_ABORT); 253 } 254 if (Tflag && uflag) { 255 (void) fprintf(stderr, 256 "You cannot use the T and u flags together.\n"); 257 Exit(X_ABORT); 258 } 259 if (strcmp(tape, "-") == 0) { 260 pipeout++; 261 tape = "standard output"; 262 } 263 264 if (blocksperfile) 265 blocksperfile = blocksperfile / ntrec * ntrec; /* round down */ 266 else { 267 /* 268 * Determine how to default tape size and density 269 * 270 * density tape size 271 * 9-track 1600 bpi (160 bytes/.1") 2300 ft. 272 * 9-track 6250 bpi (625 bytes/.1") 2300 ft. 273 * cartridge 8000 bpi (100 bytes/.1") 1700 ft. 274 * (450*4 - slop) 275 */ 276 if (density == 0) 277 density = cartridge ? 100 : 160; 278 if (tsize == 0) 279 tsize = cartridge ? 1700L*120L : 2300L*120L; 280 } 281 282 if (index(tape, ':')) { 283 host = tape; 284 tape = index(host, ':'); 285 *tape++ = 0; 286 #ifdef RDUMP 287 if (rmthost(host) == 0) 288 (void) exit(X_ABORT); 289 #else 290 (void) fprintf(stderr, "remote dump not enabled\n"); 291 (void) exit(X_ABORT); 292 #endif 293 } 294 (void) setuid(getuid()); /* rmthost() is the only reason to be setuid */ 295 296 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) 297 signal(SIGHUP, sig); 298 if (signal(SIGTRAP, SIG_IGN) != SIG_IGN) 299 signal(SIGTRAP, sig); 300 if (signal(SIGFPE, SIG_IGN) != SIG_IGN) 301 signal(SIGFPE, sig); 302 if (signal(SIGBUS, SIG_IGN) != SIG_IGN) 303 signal(SIGBUS, sig); 304 if (signal(SIGSEGV, SIG_IGN) != SIG_IGN) 305 signal(SIGSEGV, sig); 306 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) 307 signal(SIGTERM, sig); 308 if (signal(SIGINT, interrupt) == SIG_IGN) 309 signal(SIGINT, SIG_IGN); 310 311 set_operators(); /* /etc/group snarfed */ 312 getfstab(); /* /etc/fstab snarfed */ 313 /* 314 * disk can be either the full special file name, 315 * the suffix of the special file name, 316 * the special name missing the leading '/', 317 * the file system name with or without the leading '/'. 318 */ 319 dt = fstabsearch(disk); 320 if (dt != 0) { 321 disk = rawname(dt->fs_spec); 322 (void) strncpy(spcl.c_dev, dt->fs_spec, NAMELEN); 323 (void) strncpy(spcl.c_filesys, dt->fs_file, NAMELEN); 324 } else { 325 (void) strncpy(spcl.c_dev, disk, NAMELEN); 326 (void) strncpy(spcl.c_filesys, "an unlisted file system", 327 NAMELEN); 328 } 329 (void) strcpy(spcl.c_label, "none"); 330 (void) gethostname(spcl.c_host, NAMELEN); 331 spcl.c_level = level - '0'; 332 spcl.c_type = TS_TAPE; 333 if (!Tflag) 334 getdumptime(); /* /etc/dumpdates snarfed */ 335 336 msg("Date of this level %c dump: %s", level, 337 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 338 msg("Date of last level %c dump: %s", lastlevel, 339 spcl.c_ddate == 0 ? "the epoch\n" : ctime(&spcl.c_ddate)); 340 msg("Dumping %s ", disk); 341 if (dt != 0) 342 msgtail("(%s) ", dt->fs_file); 343 if (host) 344 msgtail("to %s on host %s\n", tape, host); 345 else 346 msgtail("to %s\n", tape); 347 348 if ((diskfd = open(disk, O_RDONLY)) < 0) { 349 msg("Cannot open %s\n", disk); 350 Exit(X_ABORT); 351 } 352 sync(); 353 sblock = (struct fs *)sblock_buf; 354 bread(SBOFF, (char *) sblock, SBSIZE); 355 if (sblock->fs_magic != FS_MAGIC) 356 quit("bad sblock magic number\n"); 357 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 358 dev_bshift = ffs(dev_bsize) - 1; 359 if (dev_bsize != (1 << dev_bshift)) 360 quit("dev_bsize (%d) is not a power of 2", dev_bsize); 361 tp_bshift = ffs(TP_BSIZE) - 1; 362 if (TP_BSIZE != (1 << tp_bshift)) 363 quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE); 364 #ifdef BSD44 365 if (sblock->fs_inodefmt >= FS_44INODEFMT) 366 spcl.c_flags |= DR_NEWINODEFMT; 367 #endif 368 maxino = sblock->fs_ipg * sblock->fs_ncg - 1; 369 mapsize = roundup(howmany(sblock->fs_ipg * sblock->fs_ncg, NBBY), 370 TP_BSIZE); 371 usedinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 372 dumpdirmap = (char *)calloc((unsigned) mapsize, sizeof(char)); 373 dumpinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 374 tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 375 376 msg("mapping (Pass I) [regular files]\n"); 377 anydirskipped = mapfiles(maxino, &tapesize); 378 379 msg("mapping (Pass II) [directories]\n"); 380 while (anydirskipped) { 381 anydirskipped = mapdirs(maxino, &tapesize); 382 } 383 384 if (pipeout) 385 tapesize += 10; /* 10 trailer blocks */ 386 else { 387 if (blocksperfile) 388 fetapes = (float) tapesize / blocksperfile; 389 else if (cartridge) { 390 /* Estimate number of tapes, assuming streaming stops at 391 the end of each block written, and not in mid-block. 392 Assume no erroneous blocks; this can be compensated 393 for with an artificially low tape size. */ 394 fetapes = 395 ( tapesize /* blocks */ 396 * TP_BSIZE /* bytes/block */ 397 * (1.0/density) /* 0.1" / byte */ 398 + 399 tapesize /* blocks */ 400 * (1.0/ntrec) /* streaming-stops per block */ 401 * 15.48 /* 0.1" / streaming-stop */ 402 ) * (1.0 / tsize ); /* tape / 0.1" */ 403 } else { 404 /* Estimate number of tapes, for old fashioned 9-track 405 tape */ 406 int tenthsperirg = (density == 625) ? 3 : 7; 407 fetapes = 408 ( tapesize /* blocks */ 409 * TP_BSIZE /* bytes / block */ 410 * (1.0/density) /* 0.1" / byte */ 411 + 412 tapesize /* blocks */ 413 * (1.0/ntrec) /* IRG's / block */ 414 * tenthsperirg /* 0.1" / IRG */ 415 ) * (1.0 / tsize ); /* tape / 0.1" */ 416 } 417 etapes = fetapes; /* truncating assignment */ 418 etapes++; 419 /* count the dumped inodes map on each additional tape */ 420 tapesize += (etapes - 1) * 421 (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 422 tapesize += etapes + 10; /* headers + 10 trailer blks */ 423 } 424 if (pipeout) 425 msg("estimated %ld tape blocks.\n", tapesize); 426 else 427 msg("estimated %ld tape blocks on %3.2f tape(s).\n", 428 tapesize, fetapes); 429 430 /* 431 * Allocate tape buffer 432 */ 433 if (!alloctape()) 434 quit("can't allocate tape buffers - try a smaller blocking factor.\n"); 435 436 startnewtape(1); 437 (void) time((time_t *)&(tstart_writing)); 438 dumpmap(usedinomap, TS_CLRI, maxino); 439 440 msg("dumping (Pass III) [directories]\n"); 441 for (map = dumpdirmap, ino = 0; ino < maxino; ) { 442 if ((ino % NBBY) == 0) 443 dirty = *map++; 444 else 445 dirty >>= 1; 446 ino++; 447 if ((dirty & 1) == 0) 448 continue; 449 /* 450 * Skip directory inodes deleted and maybe reallocated 451 */ 452 dp = getino(ino); 453 if ((dp->di_mode & IFMT) != IFDIR) 454 continue; 455 (void) dumpino(dp, ino); 456 } 457 458 msg("dumping (Pass IV) [regular files]\n"); 459 for (map = dumpinomap, ino = 0; ino < maxino; ) { 460 if ((ino % NBBY) == 0) 461 dirty = *map++; 462 else 463 dirty >>= 1; 464 ino++; 465 if ((dirty & 1) == 0) 466 continue; 467 /* 468 * Skip inodes deleted and reallocated as directories. 469 */ 470 dp = getino(ino); 471 if ((dp->di_mode & IFMT) == IFDIR) 472 continue; 473 (void) dumpino(dp, ino); 474 } 475 476 spcl.c_type = TS_END; 477 for (i = 0; i < ntrec; i++) 478 writeheader(maxino); 479 if (pipeout) 480 msg("DUMP: %ld tape blocks\n",spcl.c_tapea); 481 else 482 msg("DUMP: %ld tape blocks on %d volumes(s)\n", 483 spcl.c_tapea, spcl.c_volume); 484 putdumptime(); 485 trewind(); 486 broadcast("DUMP IS DONE!\7\7\n"); 487 msg("DUMP IS DONE\n"); 488 Exit(X_FINOK); 489 /* NOTREACHED */ 490 } 491 492 void 493 sig(signo) 494 int signo; 495 { 496 switch(signo) { 497 case SIGALRM: 498 case SIGBUS: 499 case SIGFPE: 500 case SIGHUP: 501 case SIGTERM: 502 case SIGTRAP: 503 if (pipeout) 504 quit("Signal on pipe: cannot recover\n"); 505 msg("Rewriting attempted as response to unknown signal.\n"); 506 (void) fflush(stderr); 507 (void) fflush(stdout); 508 close_rewind(); 509 (void) exit(X_REWRITE); 510 /* NOTREACHED */ 511 case SIGSEGV: 512 msg("SIGSEGV: ABORTING!\n"); 513 (void) signal(SIGSEGV, SIG_DFL); 514 (void) kill(0, SIGSEGV); 515 /* NOTREACHED */ 516 } 517 } 518 519 char * 520 rawname(cp) 521 char *cp; 522 { 523 static char rawbuf[MAXPATHLEN]; 524 char *rindex(); 525 char *dp = rindex(cp, '/'); 526 527 if (dp == 0) 528 return (0); 529 *dp = 0; 530 (void) strcpy(rawbuf, cp); 531 *dp = '/'; 532 (void) strcat(rawbuf, "/r"); 533 (void) strcat(rawbuf, dp+1); 534 return (rawbuf); 535 } 536 537 #ifdef sunos 538 char * 539 strerror(errnum) 540 int errnum; 541 { 542 extern int sys_nerr; 543 extern char *sys_errlist[]; 544 545 if (errnum < sys_nerr) { 546 return(sys_errlist[errnum]); 547 } else { 548 return("bogus errno in strerror"); 549 } 550 } 551 #endif 552
Indexes created Tue Sep 23 02:09:52 GMT 2025