1 /*- 2 * Copyright (c) 1980, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char copyright[] = 10 "@(#) Copyright (c) 1980, 1991, 1993\n\ 11 The Regents of the University of California. All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 06/05/93"; 16 #endif /* not lint */ 17 18 #include <sys/param.h> 19 #include <sys/time.h> 20 #ifdef sunos 21 #include <sys/vnode.h> 22 23 #include <ufs/inode.h> 24 #include <ufs/fs.h> 25 #else 26 #include <ufs/ffs/fs.h> 27 #include <ufs/ufs/dinode.h> 28 #endif 29 30 #include <protocols/dumprestore.h> 31 32 #include <ctype.h> 33 #include <errno.h> 34 #include <fcntl.h> 35 #include <fstab.h> 36 #include <signal.h> 37 #include <stdio.h> 38 #ifdef __STDC__ 39 #include <stdlib.h> 40 #include <string.h> 41 #include <unistd.h> 42 #endif 43 44 #include "dump.h" 45 #include "pathnames.h" 46 47 #ifndef SBOFF 48 #define SBOFF (SBLOCK * DEV_BSIZE) 49 #endif 50 51 int notify = 0; /* notify operator flag */ 52 int blockswritten = 0; /* number of blocks written on current tape */ 53 int tapeno = 0; /* current tape number */ 54 int density = 0; /* density in bytes/0.1" */ 55 int ntrec = NTREC; /* # tape blocks in each tape record */ 56 int cartridge = 0; /* Assume non-cartridge tape */ 57 long dev_bsize = 1; /* recalculated below */ 58 long blocksperfile; /* output blocks per file */ 59 char *host = NULL; /* remote host (if any) */ 60 61 static long numarg __P((int, char *, long, long, int *, char ***)); 62 static __dead void missingarg __P((int, char *)); 63 64 int 65 main(argc, argv) 66 int argc; 67 char **argv; 68 { 69 register ino_t ino; 70 register int dirty; 71 register struct dinode *dp; 72 register struct fstab *dt; 73 register char *map; 74 register char *cp; 75 int i, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1; 76 ino_t maxino; 77 78 spcl.c_date = 0; 79 (void)time((time_t *)&spcl.c_date); 80 81 tsize = 0; /* Default later, based on 'c' option for cart tapes */ 82 tape = _PATH_DEFTAPE; 83 dumpdates = _PATH_DUMPDATES; 84 temp = _PATH_DTMP; 85 if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0) 86 quit("TP_BSIZE must be a multiple of DEV_BSIZE\n"); 87 level = '0'; 88 argv++; 89 argc -= 2; 90 for (cp = *argv++; *cp; cp++) { 91 switch (*cp) { 92 case '-': 93 break; 94 95 case 'w': 96 lastdump('w'); /* tell us only what has to be done */ 97 exit(0); 98 99 case 'W': /* what to do */ 100 lastdump('W'); /* tell us state of what is done */ 101 exit(0); /* do nothing else */ 102 103 case 'f': /* output file */ 104 if (argc < 1) 105 missingarg('f', "output file"); 106 tape = *argv++; 107 argc--; 108 break; 109 110 case 'd': /* density, in bits per inch */ 111 density = numarg('d', "density", 112 10L, 327670L, &argc, &argv) / 10; 113 if (density >= 625 && !bflag) 114 ntrec = HIGHDENSITYTREC; 115 break; 116 117 case 's': /* tape size, feet */ 118 tsize = numarg('s', "size", 119 1L, 0L, &argc, &argv) * 12 * 10; 120 break; 121 122 case 'T': /* time of last dump */ 123 if (argc < 1) 124 missingarg('T', "time of last dump"); 125 spcl.c_ddate = unctime(*argv); 126 if (spcl.c_ddate < 0) { 127 (void)fprintf(stderr, "bad time \"%s\"\n", 128 *argv); 129 exit(X_ABORT); 130 } 131 Tflag = 1; 132 lastlevel = '?'; 133 argc--; 134 argv++; 135 break; 136 137 case 'b': /* blocks per tape write */ 138 ntrec = numarg('b', "number of blocks per write", 139 1L, 1000L, &argc, &argv); 140 break; 141 142 case 'B': /* blocks per output file */ 143 blocksperfile = numarg('B', "number of blocks per file", 144 1L, 0L, &argc, &argv); 145 break; 146 147 case 'c': /* Tape is cart. not 9-track */ 148 cartridge = 1; 149 break; 150 151 /* dump level */ 152 case '0': case '1': case '2': case '3': case '4': 153 case '5': case '6': case '7': case '8': case '9': 154 level = *cp; 155 break; 156 157 case 'u': /* update /etc/dumpdates */ 158 uflag = 1; 159 break; 160 161 case 'n': /* notify operators */ 162 notify = 1; 163 break; 164 165 case 'h': 166 honorlevel = numarg('h', "honor level", 167 0L, 10L, &argc, &argv); 168 break; 169 170 default: 171 (void)fprintf(stderr, "bad key '%c'\n", *cp); 172 exit(X_ABORT); 173 } 174 } 175 if (argc < 1) { 176 (void)fprintf(stderr, "Must specify disk or filesystem\n"); 177 exit(X_ABORT); 178 } 179 disk = *argv++; 180 argc--; 181 if (argc >= 1) { 182 (void)fprintf(stderr, "Unknown arguments to dump:"); 183 while (argc--) 184 (void)fprintf(stderr, " %s", *argv++); 185 (void)fprintf(stderr, "\n"); 186 exit(X_ABORT); 187 } 188 if (Tflag && uflag) { 189 (void)fprintf(stderr, 190 "You cannot use the T and u flags together.\n"); 191 exit(X_ABORT); 192 } 193 if (strcmp(tape, "-") == 0) { 194 pipeout++; 195 tape = "standard output"; 196 } 197 198 if (blocksperfile) 199 blocksperfile = blocksperfile / ntrec * ntrec; /* round down */ 200 else { 201 /* 202 * Determine how to default tape size and density 203 * 204 * density tape size 205 * 9-track 1600 bpi (160 bytes/.1") 2300 ft. 206 * 9-track 6250 bpi (625 bytes/.1") 2300 ft. 207 * cartridge 8000 bpi (100 bytes/.1") 1700 ft. 208 * (450*4 - slop) 209 */ 210 if (density == 0) 211 density = cartridge ? 100 : 160; 212 if (tsize == 0) 213 tsize = cartridge ? 1700L*120L : 2300L*120L; 214 } 215 216 if (index(tape, ':')) { 217 host = tape; 218 tape = index(host, ':'); 219 *tape++ = '\0'; 220 #ifdef RDUMP 221 if (rmthost(host) == 0) 222 exit(X_ABORT); 223 #else 224 (void)fprintf(stderr, "remote dump not enabled\n"); 225 exit(X_ABORT); 226 #endif 227 } 228 (void)setuid(getuid()); /* rmthost() is the only reason to be setuid */ 229 230 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) 231 signal(SIGHUP, sig); 232 if (signal(SIGTRAP, SIG_IGN) != SIG_IGN) 233 signal(SIGTRAP, sig); 234 if (signal(SIGFPE, SIG_IGN) != SIG_IGN) 235 signal(SIGFPE, sig); 236 if (signal(SIGBUS, SIG_IGN) != SIG_IGN) 237 signal(SIGBUS, sig); 238 if (signal(SIGSEGV, SIG_IGN) != SIG_IGN) 239 signal(SIGSEGV, sig); 240 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) 241 signal(SIGTERM, sig); 242 if (signal(SIGINT, interrupt) == SIG_IGN) 243 signal(SIGINT, SIG_IGN); 244 245 set_operators(); /* /etc/group snarfed */ 246 getfstab(); /* /etc/fstab snarfed */ 247 /* 248 * disk can be either the full special file name, 249 * the suffix of the special file name, 250 * the special name missing the leading '/', 251 * the file system name with or without the leading '/'. 252 */ 253 dt = fstabsearch(disk); 254 if (dt != NULL) { 255 disk = rawname(dt->fs_spec); 256 (void)strncpy(spcl.c_dev, dt->fs_spec, NAMELEN); 257 (void)strncpy(spcl.c_filesys, dt->fs_file, NAMELEN); 258 } else { 259 (void)strncpy(spcl.c_dev, disk, NAMELEN); 260 (void)strncpy(spcl.c_filesys, "an unlisted file system", 261 NAMELEN); 262 } 263 (void)strcpy(spcl.c_label, "none"); 264 (void)gethostname(spcl.c_host, NAMELEN); 265 spcl.c_level = level - '0'; 266 spcl.c_type = TS_TAPE; 267 if (!Tflag) 268 getdumptime(); /* /etc/dumpdates snarfed */ 269 270 msg("Date of this level %c dump: %s", level, 271 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 272 msg("Date of last level %c dump: %s", lastlevel, 273 spcl.c_ddate == 0 ? "the epoch\n" : ctime(&spcl.c_ddate)); 274 msg("Dumping %s ", disk); 275 if (dt != NULL) 276 msgtail("(%s) ", dt->fs_file); 277 if (host) 278 msgtail("to %s on host %s\n", tape, host); 279 else 280 msgtail("to %s\n", tape); 281 282 if ((diskfd = open(disk, O_RDONLY)) < 0) { 283 msg("Cannot open %s\n", disk); 284 exit(X_ABORT); 285 } 286 sync(); 287 sblock = (struct fs *)sblock_buf; 288 bread(SBOFF, (char *) sblock, SBSIZE); 289 if (sblock->fs_magic != FS_MAGIC) 290 quit("bad sblock magic number\n"); 291 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 292 dev_bshift = ffs(dev_bsize) - 1; 293 if (dev_bsize != (1 << dev_bshift)) 294 quit("dev_bsize (%d) is not a power of 2", dev_bsize); 295 tp_bshift = ffs(TP_BSIZE) - 1; 296 if (TP_BSIZE != (1 << tp_bshift)) 297 quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE); 298 #ifdef FS_44INODEFMT 299 if (sblock->fs_inodefmt >= FS_44INODEFMT) 300 spcl.c_flags |= DR_NEWINODEFMT; 301 #endif 302 maxino = sblock->fs_ipg * sblock->fs_ncg; 303 mapsize = roundup(howmany(maxino, NBBY), TP_BSIZE); 304 usedinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 305 dumpdirmap = (char *)calloc((unsigned) mapsize, sizeof(char)); 306 dumpinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 307 tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 308 309 nonodump = spcl.c_level < honorlevel; 310 311 msg("mapping (Pass I) [regular files]\n"); 312 anydirskipped = mapfiles(maxino, &tapesize); 313 314 msg("mapping (Pass II) [directories]\n"); 315 while (anydirskipped) { 316 anydirskipped = mapdirs(maxino, &tapesize); 317 } 318 319 if (pipeout) { 320 tapesize += 10; /* 10 trailer blocks */ 321 msg("estimated %ld tape blocks.\n", tapesize); 322 } else { 323 double fetapes; 324 325 if (blocksperfile) 326 fetapes = (double) tapesize / blocksperfile; 327 else if (cartridge) { 328 /* Estimate number of tapes, assuming streaming stops at 329 the end of each block written, and not in mid-block. 330 Assume no erroneous blocks; this can be compensated 331 for with an artificially low tape size. */ 332 fetapes = 333 ( tapesize /* blocks */ 334 * TP_BSIZE /* bytes/block */ 335 * (1.0/density) /* 0.1" / byte */ 336 + 337 tapesize /* blocks */ 338 * (1.0/ntrec) /* streaming-stops per block */ 339 * 15.48 /* 0.1" / streaming-stop */ 340 ) * (1.0 / tsize ); /* tape / 0.1" */ 341 } else { 342 /* Estimate number of tapes, for old fashioned 9-track 343 tape */ 344 int tenthsperirg = (density == 625) ? 3 : 7; 345 fetapes = 346 ( tapesize /* blocks */ 347 * TP_BSIZE /* bytes / block */ 348 * (1.0/density) /* 0.1" / byte */ 349 + 350 tapesize /* blocks */ 351 * (1.0/ntrec) /* IRG's / block */ 352 * tenthsperirg /* 0.1" / IRG */ 353 ) * (1.0 / tsize ); /* tape / 0.1" */ 354 } 355 etapes = fetapes; /* truncating assignment */ 356 etapes++; 357 /* count the dumped inodes map on each additional tape */ 358 tapesize += (etapes - 1) * 359 (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 360 tapesize += etapes + 10; /* headers + 10 trailer blks */ 361 msg("estimated %ld tape blocks on %3.2f tape(s).\n", 362 tapesize, fetapes); 363 } 364 365 /* 366 * Allocate tape buffer. 367 */ 368 if (!alloctape()) 369 quit("can't allocate tape buffers - try a smaller blocking factor.\n"); 370 371 startnewtape(1); 372 (void)time((time_t *)&(tstart_writing)); 373 dumpmap(usedinomap, TS_CLRI, maxino - 1); 374 375 msg("dumping (Pass III) [directories]\n"); 376 dirty = 0; /* XXX just to get gcc to shut up */ 377 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) { 378 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */ 379 dirty = *map++; 380 else 381 dirty >>= 1; 382 if ((dirty & 1) == 0) 383 continue; 384 /* 385 * Skip directory inodes deleted and maybe reallocated 386 */ 387 dp = getino(ino); 388 if ((dp->di_mode & IFMT) != IFDIR) 389 continue; 390 (void)dumpino(dp, ino); 391 } 392 393 msg("dumping (Pass IV) [regular files]\n"); 394 for (map = dumpinomap, ino = 1; ino < maxino; ino++) { 395 int mode; 396 397 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 inodes deleted and reallocated as directories. 405 */ 406 dp = getino(ino); 407 mode = dp->di_mode & IFMT; 408 if (mode == IFDIR) 409 continue; 410 (void)dumpino(dp, ino); 411 } 412 413 spcl.c_type = TS_END; 414 for (i = 0; i < ntrec; i++) 415 writeheader(maxino - 1); 416 if (pipeout) 417 msg("DUMP: %ld tape blocks\n",spcl.c_tapea); 418 else 419 msg("DUMP: %ld tape blocks on %d volumes(s)\n", 420 spcl.c_tapea, spcl.c_volume); 421 putdumptime(); 422 trewind(); 423 broadcast("DUMP IS DONE!\7\7\n"); 424 msg("DUMP IS DONE\n"); 425 Exit(X_FINOK); 426 /* NOTREACHED */ 427 } 428 429 /* 430 * Pick up a numeric argument. It must be nonnegative and in the given 431 * range (except that a vmax of 0 means unlimited). 432 */ 433 static long 434 numarg(letter, meaning, vmin, vmax, pargc, pargv) 435 int letter; 436 char *meaning; 437 long vmin, vmax; 438 int *pargc; 439 char ***pargv; 440 { 441 register char *p; 442 long val; 443 char *str; 444 445 if (--*pargc < 0) 446 missingarg(letter, meaning); 447 str = *(*pargv)++; 448 for (p = str; *p; p++) 449 if (!isdigit(*p)) 450 goto bad; 451 val = atol(str); 452 if (val < vmin || (vmax && val > vmax)) 453 goto bad; 454 return (val); 455 456 bad: 457 (void)fprintf(stderr, "bad '%c' (%s) value \"%s\"\n", 458 letter, meaning, str); 459 exit(X_ABORT); 460 } 461 462 static __dead void 463 missingarg(letter, meaning) 464 int letter; 465 char *meaning; 466 { 467 468 (void)fprintf(stderr, "The '%c' flag (%s) requires an argument\n", 469 letter, meaning); 470 exit(X_ABORT); 471 } 472 473 void 474 sig(signo) 475 int signo; 476 { 477 switch(signo) { 478 case SIGALRM: 479 case SIGBUS: 480 case SIGFPE: 481 case SIGHUP: 482 case SIGTERM: 483 case SIGTRAP: 484 if (pipeout) 485 quit("Signal on pipe: cannot recover\n"); 486 msg("Rewriting attempted as response to unknown signal.\n"); 487 (void)fflush(stderr); 488 (void)fflush(stdout); 489 close_rewind(); 490 exit(X_REWRITE); 491 /* NOTREACHED */ 492 case SIGSEGV: 493 msg("SIGSEGV: ABORTING!\n"); 494 (void)signal(SIGSEGV, SIG_DFL); 495 (void)kill(0, SIGSEGV); 496 /* NOTREACHED */ 497 } 498 } 499 500 char * 501 rawname(cp) 502 char *cp; 503 { 504 static char rawbuf[32]; 505 char *dp = rindex(cp, '/'); 506 507 if (dp == NULL) 508 return (NULL); 509 *dp = '\0'; 510 (void)strcpy(rawbuf, cp); 511 *dp = '/'; 512 (void)strcat(rawbuf, "/r"); 513 (void)strcat(rawbuf, dp + 1); 514 return (rawbuf); 515 } 516 517 #ifdef sunos 518 const char * 519 strerror(errnum) 520 int errnum; 521 { 522 extern int sys_nerr; 523 extern const char *const sys_errlist[]; 524 525 if (errnum < sys_nerr) 526 return (sys_errlist[errnum]); 527 else 528 return ("bogus errno in strerror"); 529 } 530 #endif 531