| 1 | #include <stdio.h> |
| 2 | #include <sys/types.h> |
| 3 | #include <sys/stat.h> |
| 4 | #include <sys/dir.h> |
| 5 | #include <signal.h> |
| 6 | |
| 7 | char *sprintf(); |
| 8 | char *strcat(); |
| 9 | daddr_t bsrch(); |
| 10 | #define TBLOCK 512 |
| 11 | #define NBLOCK 20 |
| 12 | #define NAMSIZ 100 |
| 13 | union hblock { |
| 14 | char dummy[TBLOCK]; |
| 15 | struct header { |
| 16 | char name[NAMSIZ]; |
| 17 | char mode[8]; |
| 18 | char uid[8]; |
| 19 | char gid[8]; |
| 20 | char size[12]; |
| 21 | char mtime[12]; |
| 22 | char chksum[8]; |
| 23 | char linkflag; |
| 24 | char linkname[NAMSIZ]; |
| 25 | } dbuf; |
| 26 | } dblock, tbuf[NBLOCK]; |
| 27 | |
| 28 | struct linkbuf { |
| 29 | ino_t inum; |
| 30 | dev_t devnum; |
| 31 | int count; |
| 32 | char pathname[NAMSIZ]; |
| 33 | struct linkbuf *nextp; |
| 34 | } *ihead; |
| 35 | |
| 36 | struct stat stbuf; |
| 37 | |
| 38 | int rflag, xflag, vflag, tflag, mt, cflag, mflag; |
| 39 | int term, chksum, wflag, recno, first, linkerrok; |
| 40 | int freemem = 1; |
| 41 | int nblock = 1; |
| 42 | |
| 43 | daddr_t low; |
| 44 | daddr_t high; |
| 45 | |
| 46 | FILE *tfile; |
| 47 | char tname[] = "/tmp/tarXXXXXX"; |
| 48 | |
| 49 | |
| 50 | char *usefile; |
| 51 | char magtape[] = "/dev/mt1"; |
| 52 | |
| 53 | char *malloc(); |
| 54 | |
| 55 | main(argc, argv) |
| 56 | int argc; |
| 57 | char *argv[]; |
| 58 | { |
| 59 | char *cp; |
| 60 | int onintr(), onquit(), onhup(), onterm(); |
| 61 | |
| 62 | if (argc < 2) |
| 63 | usage(); |
| 64 | |
| 65 | tfile = NULL; |
| 66 | usefile = magtape; |
| 67 | argv[argc] = 0; |
| 68 | argv++; |
| 69 | for (cp = *argv++; *cp; cp++) |
| 70 | switch(*cp) { |
| 71 | case 'f': |
| 72 | usefile = *argv++; |
| 73 | if (nblock == 1) |
| 74 | nblock = 0; |
| 75 | break; |
| 76 | case 'c': |
| 77 | cflag++; |
| 78 | rflag++; |
| 79 | break; |
| 80 | case 'u': |
| 81 | mktemp(tname); |
| 82 | if ((tfile = fopen(tname, "w")) == NULL) { |
| 83 | fprintf(stderr, "Tar: cannot create temporary file (%s)\n", tname); |
| 84 | done(1); |
| 85 | } |
| 86 | fprintf(tfile, "!!!!!/!/!/!/!/!/!/! 000\n"); |
| 87 | /* FALL THROUGH */ |
| 88 | case 'r': |
| 89 | rflag++; |
| 90 | if (nblock != 1 && cflag == 0) { |
| 91 | noupdate: |
| 92 | fprintf(stderr, "Tar: Blocked tapes cannot be updated (yet)\n"); |
| 93 | done(1); |
| 94 | } |
| 95 | break; |
| 96 | case 'v': |
| 97 | vflag++; |
| 98 | break; |
| 99 | case 'w': |
| 100 | wflag++; |
| 101 | break; |
| 102 | case 'x': |
| 103 | xflag++; |
| 104 | break; |
| 105 | case 't': |
| 106 | tflag++; |
| 107 | break; |
| 108 | case 'm': |
| 109 | mflag++; |
| 110 | break; |
| 111 | case '-': |
| 112 | break; |
| 113 | case '0': |
| 114 | case '1': |
| 115 | magtape[7] = *cp; |
| 116 | usefile = magtape; |
| 117 | break; |
| 118 | case 'b': |
| 119 | nblock = atoi(*argv++); |
| 120 | if (nblock > NBLOCK || nblock <= 0) { |
| 121 | fprintf(stderr, "Invalid blocksize. (Max %d)\n", NBLOCK); |
| 122 | done(1); |
| 123 | } |
| 124 | if (rflag && !cflag) |
| 125 | goto noupdate; |
| 126 | break; |
| 127 | case 'l': |
| 128 | linkerrok++; |
| 129 | break; |
| 130 | default: |
| 131 | fprintf(stderr, "tar: %c: unknown option\n", *cp); |
| 132 | usage(); |
| 133 | } |
| 134 | |
| 135 | if (rflag) { |
| 136 | if (cflag && tfile != NULL) { |
| 137 | usage(); |
| 138 | done(1); |
| 139 | } |
| 140 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) |
| 141 | signal(SIGINT, onintr); |
| 142 | if (signal(SIGHUP, SIG_IGN) != SIG_IGN) |
| 143 | signal(SIGHUP, onhup); |
| 144 | if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) |
| 145 | signal(SIGQUIT, onquit); |
| 146 | /* |
| 147 | if (signal(SIGTERM, SIG_IGN) != SIG_IGN) |
| 148 | signal(SIGTERM, onterm); |
| 149 | */ |
| 150 | if (strcmp(usefile, "-") == 0) { |
| 151 | if (cflag == 0) { |
| 152 | fprintf(stderr, "Can only create standard output archives\n"); |
| 153 | done(1); |
| 154 | } |
| 155 | mt = dup(1); |
| 156 | nblock = 1; |
| 157 | } |
| 158 | else if ((mt = open(usefile, 2)) < 0) { |
| 159 | if (cflag == 0 || (mt = creat(usefile, 0666)) < 0) { |
| 160 | fprintf(stderr, "tar: cannot open %s\n", usefile); |
| 161 | done(1); |
| 162 | } |
| 163 | } |
| 164 | if (cflag == 0 && nblock == 0) |
| 165 | nblock = 1; |
| 166 | dorep(argv); |
| 167 | } |
| 168 | else if (xflag) { |
| 169 | if (strcmp(usefile, "-") == 0) { |
| 170 | mt = dup(0); |
| 171 | nblock = 1; |
| 172 | } |
| 173 | else if ((mt = open(usefile, 0)) < 0) { |
| 174 | fprintf(stderr, "tar: cannot open %s\n", usefile); |
| 175 | done(1); |
| 176 | } |
| 177 | doxtract(argv); |
| 178 | } |
| 179 | else if (tflag) { |
| 180 | if (strcmp(usefile, "-") == 0) { |
| 181 | mt = dup(0); |
| 182 | nblock = 1; |
| 183 | } |
| 184 | else if ((mt = open(usefile, 0)) < 0) { |
| 185 | fprintf(stderr, "tar: cannot open %s\n", usefile); |
| 186 | done(1); |
| 187 | } |
| 188 | dotable(); |
| 189 | } |
| 190 | else |
| 191 | usage(); |
| 192 | done(0); |
| 193 | } |
| 194 | |
| 195 | usage() |
| 196 | { |
| 197 | fprintf(stderr, "tar: usage tar -{txru}[cvfblm] [tapefile] [blocksize] file1 file2...\n"); |
| 198 | done(1); |
| 199 | } |
| 200 | |
| 201 | dorep(argv) |
| 202 | char *argv[]; |
| 203 | { |
| 204 | register char *cp, *cp2; |
| 205 | char wdir[60]; |
| 206 | |
| 207 | if (!cflag) { |
| 208 | getdir(); |
| 209 | do { |
| 210 | passtape(); |
| 211 | if (term) |
| 212 | done(0); |
| 213 | getdir(); |
| 214 | } while (!endtape()); |
| 215 | if (tfile != NULL) { |
| 216 | char buf[200]; |
| 217 | |
| 218 | strcat(buf, "sort +0 -1 +1nr "); |
| 219 | strcat(buf, tname); |
| 220 | strcat(buf, " -o "); |
| 221 | strcat(buf, tname); |
| 222 | sprintf(buf, "sort +0 -1 +1nr %s -o %s; awk '$1 != prev {print; prev=$1}' %s >%sX;mv %sX %s", |
| 223 | tname, tname, tname, tname, tname, tname); |
| 224 | fflush(tfile); |
| 225 | system(buf); |
| 226 | freopen(tname, "r", tfile); |
| 227 | fstat(fileno(tfile), &stbuf); |
| 228 | high = stbuf.st_size; |
| 229 | } |
| 230 | } |
| 231 | |
| 232 | getwdir(wdir); |
| 233 | while (*argv && ! term) { |
| 234 | cp2 = *argv; |
| 235 | for (cp = *argv; *cp; cp++) |
| 236 | if (*cp == '/') |
| 237 | cp2 = cp; |
| 238 | if (cp2 != *argv) { |
| 239 | *cp2 = '\0'; |
| 240 | chdir(*argv); |
| 241 | *cp2 = '/'; |
| 242 | cp2++; |
| 243 | } |
| 244 | putfile(*argv++, cp2); |
| 245 | chdir(wdir); |
| 246 | } |
| 247 | putempty(); |
| 248 | putempty(); |
| 249 | flushtape(); |
| 250 | if (linkerrok == 1) |
| 251 | for (; ihead != NULL; ihead = ihead->nextp) |
| 252 | if (ihead->count != 0) |
| 253 | fprintf(stderr, "Missing links to %s\n", ihead->pathname); |
| 254 | } |
| 255 | |
| 256 | endtape() |
| 257 | { |
| 258 | if (dblock.dbuf.name[0] == '\0') { |
| 259 | backtape(); |
| 260 | return(1); |
| 261 | } |
| 262 | else |
| 263 | return(0); |
| 264 | } |
| 265 | |
| 266 | getdir() |
| 267 | { |
| 268 | register struct stat *sp; |
| 269 | int i; |
| 270 | |
| 271 | readtape( (char *) &dblock); |
| 272 | if (dblock.dbuf.name[0] == '\0') |
| 273 | return; |
| 274 | sp = &stbuf; |
| 275 | sscanf(dblock.dbuf.mode, "%o", &i); |
| 276 | sp->st_mode = i; |
| 277 | sscanf(dblock.dbuf.uid, "%o", &i); |
| 278 | sp->st_uid = i; |
| 279 | sscanf(dblock.dbuf.gid, "%o", &i); |
| 280 | sp->st_gid = i; |
| 281 | sscanf(dblock.dbuf.size, "%lo", &sp->st_size); |
| 282 | sscanf(dblock.dbuf.mtime, "%lo", &sp->st_mtime); |
| 283 | sscanf(dblock.dbuf.chksum, "%o", &chksum); |
| 284 | if (chksum != checksum()) { |
| 285 | fprintf(stderr, "directory checksum error\n"); |
| 286 | done(2); |
| 287 | } |
| 288 | if (tfile != NULL) |
| 289 | fprintf(tfile, "%s %s\n", dblock.dbuf.name, dblock.dbuf.mtime); |
| 290 | } |
| 291 | |
| 292 | passtape() |
| 293 | { |
| 294 | long blocks; |
| 295 | char buf[TBLOCK]; |
| 296 | |
| 297 | if (dblock.dbuf.linkflag == '1') |
| 298 | return; |
| 299 | blocks = stbuf.st_size; |
| 300 | blocks += TBLOCK-1; |
| 301 | blocks /= TBLOCK; |
| 302 | |
| 303 | while (blocks-- > 0) |
| 304 | readtape(buf); |
| 305 | } |
| 306 | |
| 307 | putfile(longname, shortname) |
| 308 | char *longname; |
| 309 | char *shortname; |
| 310 | { |
| 311 | int infile; |
| 312 | long blocks; |
| 313 | char buf[TBLOCK]; |
| 314 | register char *cp, *cp2; |
| 315 | struct direct dbuf; |
| 316 | int i, j; |
| 317 | |
| 318 | infile = open(shortname, 0); |
| 319 | if (infile < 0) { |
| 320 | fprintf(stderr, "tar: %s: cannot open file\n", longname); |
| 321 | return; |
| 322 | } |
| 323 | |
| 324 | fstat(infile, &stbuf); |
| 325 | |
| 326 | if (tfile != NULL && checkupdate(longname) == 0) { |
| 327 | close(infile); |
| 328 | return; |
| 329 | } |
| 330 | if (checkw('r', longname) == 0) { |
| 331 | close(infile); |
| 332 | return; |
| 333 | } |
| 334 | |
| 335 | if ((stbuf.st_mode & S_IFMT) == S_IFDIR) { |
| 336 | for (i = 0, cp = buf; *cp++ = longname[i++];); |
| 337 | *--cp = '/'; |
| 338 | cp++; |
| 339 | i = 0; |
| 340 | chdir(shortname); |
| 341 | while (read(infile, (char *)&dbuf, sizeof(dbuf)) > 0 && !term) { |
| 342 | if (dbuf.d_ino == 0) { |
| 343 | i++; |
| 344 | continue; |
| 345 | } |
| 346 | if (strcmp(".", dbuf.d_name) == 0 || strcmp("..", dbuf.d_name) == 0) { |
| 347 | i++; |
| 348 | continue; |
| 349 | } |
| 350 | cp2 = cp; |
| 351 | for (j=0; j < DIRSIZ; j++) |
| 352 | *cp2++ = dbuf.d_name[j]; |
| 353 | *cp2 = '\0'; |
| 354 | close(infile); |
| 355 | putfile(buf, cp); |
| 356 | infile = open(".", 0); |
| 357 | i++; |
| 358 | lseek(infile, (long) (sizeof(dbuf) * i), 0); |
| 359 | } |
| 360 | close(infile); |
| 361 | chdir(".."); |
| 362 | return; |
| 363 | } |
| 364 | if ((stbuf.st_mode & S_IFMT) != S_IFREG) { |
| 365 | fprintf(stderr, "tar: %s is not a file. Not dumped\n", longname); |
| 366 | return; |
| 367 | } |
| 368 | |
| 369 | tomodes(&stbuf); |
| 370 | |
| 371 | cp2 = longname; |
| 372 | for (cp = dblock.dbuf.name, i=0; (*cp++ = *cp2++) && i < NAMSIZ; i++); |
| 373 | if (i >= NAMSIZ) { |
| 374 | fprintf(stderr, "%s: file name too long\n", longname); |
| 375 | close(infile); |
| 376 | return; |
| 377 | } |
| 378 | |
| 379 | if (stbuf.st_nlink > 1) { |
| 380 | struct linkbuf *lp; |
| 381 | int found = 0; |
| 382 | |
| 383 | for (lp = ihead; lp != NULL; lp = lp->nextp) { |
| 384 | if (lp->inum == stbuf.st_ino && lp->devnum == stbuf.st_dev) { |
| 385 | found++; |
| 386 | break; |
| 387 | } |
| 388 | } |
| 389 | if (found) { |
| 390 | strcpy(dblock.dbuf.linkname, lp->pathname); |
| 391 | dblock.dbuf.linkflag = '1'; |
| 392 | sprintf(dblock.dbuf.chksum, "%6o", checksum()); |
| 393 | writetape( (char *) &dblock); |
| 394 | if (vflag) { |
| 395 | fprintf(stderr, "a %s ", longname); |
| 396 | fprintf(stderr, "link to %s\n", lp->pathname); |
| 397 | } |
| 398 | lp->count--; |
| 399 | close(infile); |
| 400 | return; |
| 401 | } |
| 402 | else { |
| 403 | lp = (struct linkbuf *) malloc(sizeof(*lp)); |
| 404 | if (lp == NULL) { |
| 405 | if (freemem) { |
| 406 | fprintf(stderr, "Out of memory. Link information lost\n"); |
| 407 | freemem = 0; |
| 408 | } |
| 409 | } |
| 410 | else { |
| 411 | lp->nextp = ihead; |
| 412 | ihead = lp; |
| 413 | lp->inum = stbuf.st_ino; |
| 414 | lp->devnum = stbuf.st_dev; |
| 415 | lp->count = stbuf.st_nlink - 1; |
| 416 | strcpy(lp->pathname, longname); |
| 417 | } |
| 418 | } |
| 419 | } |
| 420 | |
| 421 | blocks = (stbuf.st_size + (TBLOCK-1)) / TBLOCK; |
| 422 | if (vflag) { |
| 423 | fprintf(stderr, "a %s ", longname); |
| 424 | fprintf(stderr, "%ld blocks\n", blocks); |
| 425 | } |
| 426 | sprintf(dblock.dbuf.chksum, "%6o", checksum()); |
| 427 | writetape( (char *) &dblock); |
| 428 | |
| 429 | while ((i = read(infile, buf, TBLOCK)) > 0 && blocks > 0) { |
| 430 | writetape(buf); |
| 431 | blocks--; |
| 432 | } |
| 433 | close(infile); |
| 434 | if (blocks != 0 || i != 0) |
| 435 | fprintf(stderr, "%s: file changed size\n", longname); |
| 436 | while (blocks-- > 0) |
| 437 | putempty(); |
| 438 | } |
| 439 | |
| 440 | |
| 441 | |
| 442 | doxtract(argv) |
| 443 | char *argv[]; |
| 444 | { |
| 445 | long blocks, bytes; |
| 446 | char buf[TBLOCK]; |
| 447 | char **cp; |
| 448 | int ofile; |
| 449 | |
| 450 | for (;;) { |
| 451 | getdir(); |
| 452 | if (endtape()) |
| 453 | break; |
| 454 | |
| 455 | if (*argv == 0) |
| 456 | goto gotit; |
| 457 | |
| 458 | for (cp = argv; *cp; cp++) |
| 459 | if (prefix(*cp, dblock.dbuf.name)) |
| 460 | goto gotit; |
| 461 | passtape(); |
| 462 | continue; |
| 463 | |
| 464 | gotit: |
| 465 | if (checkw('x', dblock.dbuf.name) == 0) { |
| 466 | passtape(); |
| 467 | continue; |
| 468 | } |
| 469 | |
| 470 | checkdir(dblock.dbuf.name); |
| 471 | |
| 472 | if (dblock.dbuf.linkflag == '1') { |
| 473 | unlink(dblock.dbuf.name); |
| 474 | if (link(dblock.dbuf.linkname, dblock.dbuf.name) < 0) { |
| 475 | fprintf(stderr, "%s: cannot link\n", dblock.dbuf.name); |
| 476 | continue; |
| 477 | } |
| 478 | if (vflag) |
| 479 | fprintf(stderr, "%s linked to %s\n", dblock.dbuf.name, dblock.dbuf.linkname); |
| 480 | continue; |
| 481 | } |
| 482 | if ((ofile = creat(dblock.dbuf.name, stbuf.st_mode & 07777)) < 0) { |
| 483 | fprintf(stderr, "tar: %s - cannot create\n", dblock.dbuf.name); |
| 484 | passtape(); |
| 485 | continue; |
| 486 | } |
| 487 | |
| 488 | chown(dblock.dbuf.name, stbuf.st_uid, stbuf.st_gid); |
| 489 | |
| 490 | blocks = ((bytes = stbuf.st_size) + TBLOCK-1)/TBLOCK; |
| 491 | if (vflag) |
| 492 | fprintf(stderr, "x %s, %ld bytes, %ld tape blocks\n", dblock.dbuf.name, bytes, blocks); |
| 493 | while (blocks-- > 0) { |
| 494 | readtape(buf); |
| 495 | if (bytes > TBLOCK) { |
| 496 | if (write(ofile, buf, TBLOCK) < 0) { |
| 497 | fprintf(stderr, "tar: %s: HELP - extract write error\n", dblock.dbuf.name); |
| 498 | done(2); |
| 499 | } |
| 500 | } else |
| 501 | if (write(ofile, buf, (int) bytes) < 0) { |
| 502 | fprintf(stderr, "tar: %s: HELP - extract write error\n", dblock.dbuf.name); |
| 503 | done(2); |
| 504 | } |
| 505 | bytes -= TBLOCK; |
| 506 | } |
| 507 | close(ofile); |
| 508 | if (mflag == 0) { |
| 509 | time_t timep[2]; |
| 510 | |
| 511 | timep[0] = time(NULL); |
| 512 | timep[1] = stbuf.st_mtime; |
| 513 | utime(dblock.dbuf.name, timep); |
| 514 | } |
| 515 | } |
| 516 | } |
| 517 | |
| 518 | dotable() |
| 519 | { |
| 520 | for (;;) { |
| 521 | getdir(); |
| 522 | if (endtape()) |
| 523 | break; |
| 524 | if (vflag) |
| 525 | longt(&stbuf); |
| 526 | printf("%s", dblock.dbuf.name); |
| 527 | if (dblock.dbuf.linkflag == '1') |
| 528 | printf(" linked to %s", dblock.dbuf.linkname); |
| 529 | printf("\n"); |
| 530 | passtape(); |
| 531 | } |
| 532 | } |
| 533 | |
| 534 | putempty() |
| 535 | { |
| 536 | char buf[TBLOCK]; |
| 537 | char *cp; |
| 538 | |
| 539 | for (cp = buf; cp < &buf[TBLOCK]; ) |
| 540 | *cp++ = '\0'; |
| 541 | writetape(buf); |
| 542 | } |
| 543 | |
| 544 | longt(st) |
| 545 | register struct stat *st; |
| 546 | { |
| 547 | register char *cp; |
| 548 | char *ctime(); |
| 549 | |
| 550 | pmode(st); |
| 551 | printf("%3d/%1d", st->st_uid, st->st_gid); |
| 552 | printf("%7D", st->st_size); |
| 553 | cp = ctime(&st->st_mtime); |
| 554 | printf(" %-12.12s %-4.4s ", cp+4, cp+20); |
| 555 | } |
| 556 | |
| 557 | #define SUID 04000 |
| 558 | #define SGID 02000 |
| 559 | #define ROWN 0400 |
| 560 | #define WOWN 0200 |
| 561 | #define XOWN 0100 |
| 562 | #define RGRP 040 |
| 563 | #define WGRP 020 |
| 564 | #define XGRP 010 |
| 565 | #define ROTH 04 |
| 566 | #define WOTH 02 |
| 567 | #define XOTH 01 |
| 568 | #define STXT 01000 |
| 569 | int m1[] = { 1, ROWN, 'r', '-' }; |
| 570 | int m2[] = { 1, WOWN, 'w', '-' }; |
| 571 | int m3[] = { 2, SUID, 's', XOWN, 'x', '-' }; |
| 572 | int m4[] = { 1, RGRP, 'r', '-' }; |
| 573 | int m5[] = { 1, WGRP, 'w', '-' }; |
| 574 | int m6[] = { 2, SGID, 's', XGRP, 'x', '-' }; |
| 575 | int m7[] = { 1, ROTH, 'r', '-' }; |
| 576 | int m8[] = { 1, WOTH, 'w', '-' }; |
| 577 | int m9[] = { 2, STXT, 't', XOTH, 'x', '-' }; |
| 578 | |
| 579 | int *m[] = { m1, m2, m3, m4, m5, m6, m7, m8, m9}; |
| 580 | |
| 581 | pmode(st) |
| 582 | register struct stat *st; |
| 583 | { |
| 584 | register int **mp; |
| 585 | |
| 586 | for (mp = &m[0]; mp < &m[9];) |
| 587 | select(*mp++, st); |
| 588 | } |
| 589 | |
| 590 | select(pairp, st) |
| 591 | int *pairp; |
| 592 | struct stat *st; |
| 593 | { |
| 594 | register int n, *ap; |
| 595 | |
| 596 | ap = pairp; |
| 597 | n = *ap++; |
| 598 | while (--n>=0 && (st->st_mode&*ap++)==0) |
| 599 | ap++; |
| 600 | printf("%c", *ap); |
| 601 | } |
| 602 | |
| 603 | checkdir(name) |
| 604 | register char *name; |
| 605 | { |
| 606 | register char *cp; |
| 607 | int i; |
| 608 | for (cp = name; *cp; cp++) { |
| 609 | if (*cp == '/') { |
| 610 | *cp = '\0'; |
| 611 | if (access(name, 01) < 0) { |
| 612 | if (fork() == 0) { |
| 613 | execl("/bin/mkdir", "mkdir", name, 0); |
| 614 | execl("/usr/bin/mkdir", "mkdir", name, 0); |
| 615 | fprintf(stderr, "tar: cannot find mkdir!\n"); |
| 616 | done(0); |
| 617 | } |
| 618 | while (wait(&i) >= 0); |
| 619 | chown(name, stbuf.st_uid, stbuf.st_gid); |
| 620 | } |
| 621 | *cp = '/'; |
| 622 | } |
| 623 | } |
| 624 | } |
| 625 | |
| 626 | onintr() |
| 627 | { |
| 628 | signal(SIGINT, SIG_IGN); |
| 629 | term++; |
| 630 | } |
| 631 | |
| 632 | onquit() |
| 633 | { |
| 634 | signal(SIGQUIT, SIG_IGN); |
| 635 | term++; |
| 636 | } |
| 637 | |
| 638 | onhup() |
| 639 | { |
| 640 | signal(SIGHUP, SIG_IGN); |
| 641 | term++; |
| 642 | } |
| 643 | |
| 644 | onterm() |
| 645 | { |
| 646 | signal(SIGTERM, SIG_IGN); |
| 647 | term++; |
| 648 | } |
| 649 | |
| 650 | tomodes(sp) |
| 651 | register struct stat *sp; |
| 652 | { |
| 653 | register char *cp; |
| 654 | |
| 655 | for (cp = dblock.dummy; cp < &dblock.dummy[TBLOCK]; cp++) |
| 656 | *cp = '\0'; |
| 657 | sprintf(dblock.dbuf.mode, "%6o ", sp->st_mode & 07777); |
| 658 | sprintf(dblock.dbuf.uid, "%6o ", sp->st_uid); |
| 659 | sprintf(dblock.dbuf.gid, "%6o ", sp->st_gid); |
| 660 | sprintf(dblock.dbuf.size, "%11lo ", sp->st_size); |
| 661 | sprintf(dblock.dbuf.mtime, "%11lo ", sp->st_mtime); |
| 662 | } |
| 663 | |
| 664 | checksum() |
| 665 | { |
| 666 | register i; |
| 667 | register char *cp; |
| 668 | |
| 669 | for (cp = dblock.dbuf.chksum; cp < &dblock.dbuf.chksum[sizeof(dblock.dbuf.chksum)]; cp++) |
| 670 | *cp = ' '; |
| 671 | i = 0; |
| 672 | for (cp = dblock.dummy; cp < &dblock.dummy[TBLOCK]; cp++) |
| 673 | i += *cp; |
| 674 | return(i); |
| 675 | } |
| 676 | |
| 677 | checkw(c, name) |
| 678 | char *name; |
| 679 | { |
| 680 | if (wflag) { |
| 681 | printf("%c ", c); |
| 682 | if (vflag) |
| 683 | longt(&stbuf); |
| 684 | printf("%s: ", name); |
| 685 | if (response() == 'y'){ |
| 686 | return(1); |
| 687 | } |
| 688 | return(0); |
| 689 | } |
| 690 | return(1); |
| 691 | } |
| 692 | |
| 693 | response() |
| 694 | { |
| 695 | char c; |
| 696 | |
| 697 | c = getchar(); |
| 698 | if (c != '\n') |
| 699 | while (getchar() != '\n'); |
| 700 | else c = 'n'; |
| 701 | return(c); |
| 702 | } |
| 703 | |
| 704 | checkupdate(arg) |
| 705 | char *arg; |
| 706 | { |
| 707 | char name[100]; |
| 708 | long mtime; |
| 709 | daddr_t seekp; |
| 710 | daddr_t lookup(); |
| 711 | |
| 712 | rewind(tfile); |
| 713 | for (;;) { |
| 714 | if ((seekp = lookup(arg)) < 0) |
| 715 | return(1); |
| 716 | fseek(tfile, seekp, 0); |
| 717 | fscanf(tfile, "%s %lo", name, &mtime); |
| 718 | if (stbuf.st_mtime > mtime) |
| 719 | return(1); |
| 720 | else |
| 721 | return(0); |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | done(n) |
| 726 | { |
| 727 | unlink(tname); |
| 728 | exit(n); |
| 729 | } |
| 730 | |
| 731 | prefix(s1, s2) |
| 732 | register char *s1, *s2; |
| 733 | { |
| 734 | while (*s1) |
| 735 | if (*s1++ != *s2++) |
| 736 | return(0); |
| 737 | if (*s2) |
| 738 | return(*s2 == '/'); |
| 739 | return(1); |
| 740 | } |
| 741 | |
| 742 | getwdir(s) |
| 743 | char *s; |
| 744 | { |
| 745 | int i; |
| 746 | int pipdes[2]; |
| 747 | |
| 748 | pipe(pipdes); |
| 749 | if ((i = fork()) == 0) { |
| 750 | close(1); |
| 751 | dup(pipdes[1]); |
| 752 | execl("/bin/pwd", "pwd", 0); |
| 753 | execl("/usr/bin/pwd", "pwd", 0); |
| 754 | fprintf(stderr, "pwd failed!\n"); |
| 755 | printf("/\n"); |
| 756 | exit(1); |
| 757 | } |
| 758 | while (wait((int *)NULL) != -1) |
| 759 | ; |
| 760 | read(pipdes[0], s, 50); |
| 761 | while(*s != '\n') |
| 762 | s++; |
| 763 | *s = '\0'; |
| 764 | close(pipdes[0]); |
| 765 | close(pipdes[1]); |
| 766 | } |
| 767 | |
| 768 | #define N 200 |
| 769 | int njab; |
| 770 | daddr_t |
| 771 | lookup(s) |
| 772 | char *s; |
| 773 | { |
| 774 | register i; |
| 775 | daddr_t a; |
| 776 | |
| 777 | for(i=0; s[i]; i++) |
| 778 | if(s[i] == ' ') |
| 779 | break; |
| 780 | a = bsrch(s, i, low, high); |
| 781 | return(a); |
| 782 | } |
| 783 | |
| 784 | daddr_t |
| 785 | bsrch(s, n, l, h) |
| 786 | daddr_t l, h; |
| 787 | char *s; |
| 788 | { |
| 789 | register i, j; |
| 790 | char b[N]; |
| 791 | daddr_t m, m1; |
| 792 | |
| 793 | njab = 0; |
| 794 | |
| 795 | loop: |
| 796 | if(l >= h) |
| 797 | return(-1L); |
| 798 | m = l + (h-l)/2 - N/2; |
| 799 | if(m < l) |
| 800 | m = l; |
| 801 | fseek(tfile, m, 0); |
| 802 | fread(b, 1, N, tfile); |
| 803 | njab++; |
| 804 | for(i=0; i<N; i++) { |
| 805 | if(b[i] == '\n') |
| 806 | break; |
| 807 | m++; |
| 808 | } |
| 809 | if(m >= h) |
| 810 | return(-1L); |
| 811 | m1 = m; |
| 812 | j = i; |
| 813 | for(i++; i<N; i++) { |
| 814 | m1++; |
| 815 | if(b[i] == '\n') |
| 816 | break; |
| 817 | } |
| 818 | i = cmp(b+j, s, n); |
| 819 | if(i < 0) { |
| 820 | h = m; |
| 821 | goto loop; |
| 822 | } |
| 823 | if(i > 0) { |
| 824 | l = m1; |
| 825 | goto loop; |
| 826 | } |
| 827 | return(m); |
| 828 | } |
| 829 | |
| 830 | cmp(b, s, n) |
| 831 | char *b, *s; |
| 832 | { |
| 833 | register i; |
| 834 | |
| 835 | if(b[0] != '\n') |
| 836 | exit(2); |
| 837 | for(i=0; i<n; i++) { |
| 838 | if(b[i+1] > s[i]) |
| 839 | return(-1); |
| 840 | if(b[i+1] < s[i]) |
| 841 | return(1); |
| 842 | } |
| 843 | return(b[i+1] == ' '? 0 : -1); |
| 844 | } |
| 845 | |
| 846 | readtape(buffer) |
| 847 | char *buffer; |
| 848 | { |
| 849 | int i, j; |
| 850 | |
| 851 | if (recno >= nblock || first == 0) { |
| 852 | if (first == 0 && nblock == 0) |
| 853 | j = NBLOCK; |
| 854 | else |
| 855 | j = nblock; |
| 856 | if ((i = read(mt, tbuf, TBLOCK*j)) < 0) { |
| 857 | fprintf(stderr, "Tar: tape read error\n"); |
| 858 | done(3); |
| 859 | } |
| 860 | if (first == 0) { |
| 861 | if ((i % TBLOCK) != 0) { |
| 862 | fprintf(stderr, "Tar: tape blocksize error\n"); |
| 863 | done(3); |
| 864 | } |
| 865 | i /= TBLOCK; |
| 866 | if (rflag && i != 1) { |
| 867 | fprintf(stderr, "Tar: Cannot update blocked tapes (yet)\n"); |
| 868 | done(4); |
| 869 | } |
| 870 | if (i != nblock && i != 1) { |
| 871 | fprintf(stderr, "Tar: blocksize = %d\n", i); |
| 872 | nblock = i; |
| 873 | } |
| 874 | } |
| 875 | recno = 0; |
| 876 | } |
| 877 | first = 1; |
| 878 | copy(buffer, &tbuf[recno++]); |
| 879 | return(TBLOCK); |
| 880 | } |
| 881 | |
| 882 | writetape(buffer) |
| 883 | char *buffer; |
| 884 | { |
| 885 | first = 1; |
| 886 | if (nblock == 0) |
| 887 | nblock = 1; |
| 888 | if (recno >= nblock) { |
| 889 | if (write(mt, tbuf, TBLOCK*nblock) < 0) { |
| 890 | fprintf(stderr, "Tar: tape write error\n"); |
| 891 | done(2); |
| 892 | } |
| 893 | recno = 0; |
| 894 | } |
| 895 | copy(&tbuf[recno++], buffer); |
| 896 | if (recno >= nblock) { |
| 897 | if (write(mt, tbuf, TBLOCK*nblock) < 0) { |
| 898 | fprintf(stderr, "Tar: tape write error\n"); |
| 899 | done(2); |
| 900 | } |
| 901 | recno = 0; |
| 902 | } |
| 903 | return(TBLOCK); |
| 904 | } |
| 905 | |
| 906 | backtape() |
| 907 | { |
| 908 | lseek(mt, (long) -TBLOCK, 1); |
| 909 | if (recno >= nblock) { |
| 910 | recno = nblock - 1; |
| 911 | if (read(mt, tbuf, TBLOCK*nblock) < 0) { |
| 912 | fprintf(stderr, "Tar: tape read error after seek\n"); |
| 913 | done(4); |
| 914 | } |
| 915 | lseek(mt, (long) -TBLOCK, 1); |
| 916 | } |
| 917 | } |
| 918 | |
| 919 | flushtape() |
| 920 | { |
| 921 | write(mt, tbuf, TBLOCK*nblock); |
| 922 | } |
| 923 | |
| 924 | copy(to, from) |
| 925 | register char *to, *from; |
| 926 | { |
| 927 | register i; |
| 928 | |
| 929 | i = TBLOCK; |
| 930 | do { |
| 931 | *to++ = *from++; |
| 932 | } while (--i); |
| 933 | } |