| 1 | #ifndef lint |
| 2 | static char *sccsid = "@(#)tar.c 4.17 (Berkeley) %G%"; |
| 3 | #endif |
| 4 | |
| 5 | /* |
| 6 | * Tape Archival Program |
| 7 | */ |
| 8 | #include <stdio.h> |
| 9 | #include <sys/param.h> |
| 10 | #include <sys/stat.h> |
| 11 | #include <sys/dir.h> |
| 12 | #include <sys/ioctl.h> |
| 13 | #include <sys/mtio.h> |
| 14 | #include <sys/time.h> |
| 15 | #include <signal.h> |
| 16 | #include <errno.h> |
| 17 | |
| 18 | #define TBLOCK 512 |
| 19 | #define NBLOCK 20 |
| 20 | #define NAMSIZ 100 |
| 21 | |
| 22 | union hblock { |
| 23 | char dummy[TBLOCK]; |
| 24 | struct header { |
| 25 | char name[NAMSIZ]; |
| 26 | char mode[8]; |
| 27 | char uid[8]; |
| 28 | char gid[8]; |
| 29 | char size[12]; |
| 30 | char mtime[12]; |
| 31 | char chksum[8]; |
| 32 | char linkflag; |
| 33 | char linkname[NAMSIZ]; |
| 34 | } dbuf; |
| 35 | }; |
| 36 | |
| 37 | struct linkbuf { |
| 38 | ino_t inum; |
| 39 | dev_t devnum; |
| 40 | int count; |
| 41 | char pathname[NAMSIZ]; |
| 42 | struct linkbuf *nextp; |
| 43 | }; |
| 44 | |
| 45 | union hblock dblock; |
| 46 | union hblock *tbuf; |
| 47 | struct linkbuf *ihead; |
| 48 | struct stat stbuf; |
| 49 | |
| 50 | int rflag; |
| 51 | int xflag; |
| 52 | int vflag; |
| 53 | int tflag; |
| 54 | int cflag; |
| 55 | int mflag; |
| 56 | int fflag; |
| 57 | int iflag; |
| 58 | int oflag; |
| 59 | int pflag; |
| 60 | int wflag; |
| 61 | int hflag; |
| 62 | int Bflag; |
| 63 | int Fflag; |
| 64 | |
| 65 | int mt; |
| 66 | int term; |
| 67 | int chksum; |
| 68 | int recno; |
| 69 | int first; |
| 70 | int linkerrok; |
| 71 | int freemem = 1; |
| 72 | int nblock = NBLOCK; |
| 73 | int onintr(); |
| 74 | int onquit(); |
| 75 | int onhup(); |
| 76 | int onterm(); |
| 77 | |
| 78 | daddr_t low; |
| 79 | daddr_t high; |
| 80 | daddr_t bsrch(); |
| 81 | |
| 82 | FILE *tfile; |
| 83 | char tname[] = "/tmp/tarXXXXXX"; |
| 84 | char *usefile; |
| 85 | char magtape[] = "/dev/rmt8"; |
| 86 | char *malloc(); |
| 87 | char *sprintf(); |
| 88 | char *strcat(); |
| 89 | char *rindex(); |
| 90 | char *getcwd(); |
| 91 | char *getwd(); |
| 92 | |
| 93 | main(argc, argv) |
| 94 | int argc; |
| 95 | char *argv[]; |
| 96 | { |
| 97 | char *cp; |
| 98 | |
| 99 | if (argc < 2) |
| 100 | usage(); |
| 101 | |
| 102 | tfile = NULL; |
| 103 | usefile = magtape; |
| 104 | argv[argc] = 0; |
| 105 | argv++; |
| 106 | for (cp = *argv++; *cp; cp++) |
| 107 | switch(*cp) { |
| 108 | |
| 109 | case 'f': |
| 110 | if (*argv == 0) { |
| 111 | fprintf(stderr, |
| 112 | "tar: tapefile must be specified with 'f' option\n"); |
| 113 | usage(); |
| 114 | } |
| 115 | usefile = *argv++; |
| 116 | fflag++; |
| 117 | break; |
| 118 | |
| 119 | case 'c': |
| 120 | cflag++; |
| 121 | rflag++; |
| 122 | break; |
| 123 | |
| 124 | case 'o': |
| 125 | oflag++; |
| 126 | break; |
| 127 | |
| 128 | case 'p': |
| 129 | pflag++; |
| 130 | break; |
| 131 | |
| 132 | case 'u': |
| 133 | mktemp(tname); |
| 134 | if ((tfile = fopen(tname, "w")) == NULL) { |
| 135 | fprintf(stderr, |
| 136 | "Tar: cannot create temporary file (%s)\n", |
| 137 | tname); |
| 138 | done(1); |
| 139 | } |
| 140 | fprintf(tfile, "!!!!!/!/!/!/!/!/!/! 000\n"); |
| 141 | /*FALL THRU*/ |
| 142 | |
| 143 | case 'r': |
| 144 | rflag++; |
| 145 | break; |
| 146 | |
| 147 | case 'v': |
| 148 | vflag++; |
| 149 | break; |
| 150 | |
| 151 | case 'w': |
| 152 | wflag++; |
| 153 | break; |
| 154 | |
| 155 | case 'x': |
| 156 | xflag++; |
| 157 | break; |
| 158 | |
| 159 | case 't': |
| 160 | tflag++; |
| 161 | break; |
| 162 | |
| 163 | case 'm': |
| 164 | mflag++; |
| 165 | break; |
| 166 | |
| 167 | case '-': |
| 168 | break; |
| 169 | |
| 170 | case '0': |
| 171 | case '1': |
| 172 | case '4': |
| 173 | case '5': |
| 174 | case '7': |
| 175 | case '8': |
| 176 | magtape[8] = *cp; |
| 177 | usefile = magtape; |
| 178 | break; |
| 179 | |
| 180 | case 'b': |
| 181 | if (*argv == 0) { |
| 182 | fprintf(stderr, |
| 183 | "tar: blocksize must be specified with 'b' option\n"); |
| 184 | usage(); |
| 185 | } |
| 186 | nblock = atoi(*argv); |
| 187 | if (nblock <= 0) { |
| 188 | fprintf(stderr, |
| 189 | "tar: invalid blocksize \"%s\"\n", *argv); |
| 190 | done(1); |
| 191 | } |
| 192 | argv++; |
| 193 | break; |
| 194 | |
| 195 | case 'l': |
| 196 | linkerrok++; |
| 197 | break; |
| 198 | |
| 199 | case 'h': |
| 200 | hflag++; |
| 201 | break; |
| 202 | |
| 203 | case 'i': |
| 204 | iflag++; |
| 205 | break; |
| 206 | |
| 207 | case 'B': |
| 208 | Bflag++; |
| 209 | break; |
| 210 | |
| 211 | case 'F': |
| 212 | Fflag++; |
| 213 | break; |
| 214 | |
| 215 | default: |
| 216 | fprintf(stderr, "tar: %c: unknown option\n", *cp); |
| 217 | usage(); |
| 218 | } |
| 219 | |
| 220 | if (!rflag && !xflag && !tflag) |
| 221 | usage(); |
| 222 | tbuf = (union hblock *)malloc(nblock*TBLOCK); |
| 223 | if (tbuf == NULL) { |
| 224 | fprintf(stderr, "tar: blocksize %d too big, can't get memory\n", |
| 225 | nblock); |
| 226 | done(1); |
| 227 | } |
| 228 | if (rflag) { |
| 229 | if (cflag && tfile != NULL) |
| 230 | usage(); |
| 231 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) |
| 232 | signal(SIGINT, onintr); |
| 233 | if (signal(SIGHUP, SIG_IGN) != SIG_IGN) |
| 234 | signal(SIGHUP, onhup); |
| 235 | if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) |
| 236 | signal(SIGQUIT, onquit); |
| 237 | #ifdef notdef |
| 238 | if (signal(SIGTERM, SIG_IGN) != SIG_IGN) |
| 239 | signal(SIGTERM, onterm); |
| 240 | #endif |
| 241 | if (strcmp(usefile, "-") == 0) { |
| 242 | if (cflag == 0) { |
| 243 | fprintf(stderr, |
| 244 | "tar: can only create standard output archives\n"); |
| 245 | done(1); |
| 246 | } |
| 247 | mt = dup(1); |
| 248 | nblock = 1; |
| 249 | } else if ((mt = open(usefile, 2)) < 0) { |
| 250 | if (cflag == 0 || (mt = creat(usefile, 0666)) < 0) { |
| 251 | fprintf(stderr, |
| 252 | "tar: cannot open %s\n", usefile); |
| 253 | done(1); |
| 254 | } |
| 255 | } |
| 256 | dorep(argv); |
| 257 | done(0); |
| 258 | } |
| 259 | if (strcmp(usefile, "-") == 0) { |
| 260 | mt = dup(0); |
| 261 | nblock = 1; |
| 262 | } else if ((mt = open(usefile, 0)) < 0) { |
| 263 | fprintf(stderr, "tar: cannot open %s\n", usefile); |
| 264 | done(1); |
| 265 | } |
| 266 | if (xflag) |
| 267 | doxtract(argv); |
| 268 | else |
| 269 | dotable(); |
| 270 | done(0); |
| 271 | } |
| 272 | |
| 273 | usage() |
| 274 | { |
| 275 | fprintf(stderr, |
| 276 | "tar: usage: tar -{txru}[cvfblmhopwBi] [tapefile] [blocksize] file1 file2...\n"); |
| 277 | done(1); |
| 278 | } |
| 279 | |
| 280 | dorep(argv) |
| 281 | char *argv[]; |
| 282 | { |
| 283 | register char *cp, *cp2; |
| 284 | char wdir[MAXPATHLEN], tempdir[MAXPATHLEN], *parent; |
| 285 | |
| 286 | if (!cflag) { |
| 287 | getdir(); |
| 288 | do { |
| 289 | passtape(); |
| 290 | if (term) |
| 291 | done(0); |
| 292 | getdir(); |
| 293 | } while (!endtape()); |
| 294 | backtape(); |
| 295 | if (tfile != NULL) { |
| 296 | char buf[200]; |
| 297 | |
| 298 | sprintf(buf, |
| 299 | "sort +0 -1 +1nr %s -o %s; awk '$1 != prev {print; prev=$1}' %s >%sX; mv %sX %s", |
| 300 | tname, tname, tname, tname, tname, tname); |
| 301 | fflush(tfile); |
| 302 | system(buf); |
| 303 | freopen(tname, "r", tfile); |
| 304 | fstat(fileno(tfile), &stbuf); |
| 305 | high = stbuf.st_size; |
| 306 | } |
| 307 | } |
| 308 | |
| 309 | (void) getcwd(wdir); |
| 310 | while (*argv && ! term) { |
| 311 | cp2 = *argv; |
| 312 | if (!strcmp(cp2, "-C") && argv[1]) { |
| 313 | argv++; |
| 314 | if (chdir(*argv) < 0) |
| 315 | perror(*argv); |
| 316 | else |
| 317 | (void) getcwd(wdir); |
| 318 | argv++; |
| 319 | continue; |
| 320 | } |
| 321 | parent = wdir; |
| 322 | for (cp = *argv; *cp; cp++) |
| 323 | if (*cp == '/') |
| 324 | cp2 = cp; |
| 325 | if (cp2 != *argv) { |
| 326 | *cp2 = '\0'; |
| 327 | if (chdir(*argv) < 0) { |
| 328 | perror(*argv); |
| 329 | continue; |
| 330 | } |
| 331 | parent = getcwd(tempdir); |
| 332 | *cp2 = '/'; |
| 333 | cp2++; |
| 334 | } |
| 335 | putfile(*argv++, cp2, parent); |
| 336 | chdir(wdir); |
| 337 | } |
| 338 | putempty(); |
| 339 | putempty(); |
| 340 | flushtape(); |
| 341 | if (linkerrok == 0) |
| 342 | return; |
| 343 | for (; ihead != NULL; ihead = ihead->nextp) { |
| 344 | if (ihead->count == 0) |
| 345 | continue; |
| 346 | fprintf(stderr, "tar: missing links to %s\n", ihead->pathname); |
| 347 | } |
| 348 | } |
| 349 | |
| 350 | endtape() |
| 351 | { |
| 352 | return (dblock.dbuf.name[0] == '\0'); |
| 353 | } |
| 354 | |
| 355 | getdir() |
| 356 | { |
| 357 | register struct stat *sp; |
| 358 | int i; |
| 359 | |
| 360 | top: |
| 361 | readtape((char *)&dblock); |
| 362 | if (dblock.dbuf.name[0] == '\0') |
| 363 | return; |
| 364 | sp = &stbuf; |
| 365 | sscanf(dblock.dbuf.mode, "%o", &i); |
| 366 | sp->st_mode = i; |
| 367 | sscanf(dblock.dbuf.uid, "%o", &i); |
| 368 | sp->st_uid = i; |
| 369 | sscanf(dblock.dbuf.gid, "%o", &i); |
| 370 | sp->st_gid = i; |
| 371 | sscanf(dblock.dbuf.size, "%lo", &sp->st_size); |
| 372 | sscanf(dblock.dbuf.mtime, "%lo", &sp->st_mtime); |
| 373 | sscanf(dblock.dbuf.chksum, "%o", &chksum); |
| 374 | if (chksum != (i = checksum())) { |
| 375 | fprintf(stderr, "tar: directory checksum error (%d != %d)\n", |
| 376 | chksum, i); |
| 377 | if (iflag) |
| 378 | goto top; |
| 379 | done(2); |
| 380 | } |
| 381 | if (tfile != NULL) |
| 382 | fprintf(tfile, "%s %s\n", dblock.dbuf.name, dblock.dbuf.mtime); |
| 383 | } |
| 384 | |
| 385 | passtape() |
| 386 | { |
| 387 | long blocks; |
| 388 | char buf[TBLOCK]; |
| 389 | |
| 390 | if (dblock.dbuf.linkflag == '1') |
| 391 | return; |
| 392 | blocks = stbuf.st_size; |
| 393 | blocks += TBLOCK-1; |
| 394 | blocks /= TBLOCK; |
| 395 | |
| 396 | while (blocks-- > 0) |
| 397 | readtape(buf); |
| 398 | } |
| 399 | |
| 400 | putfile(longname, shortname, parent) |
| 401 | char *longname; |
| 402 | char *shortname; |
| 403 | char *parent; |
| 404 | { |
| 405 | int infile = 0; |
| 406 | long blocks; |
| 407 | char buf[TBLOCK]; |
| 408 | register char *cp, *cp2; |
| 409 | struct direct *dp; |
| 410 | DIR *dirp; |
| 411 | int i, j; |
| 412 | char newparent[NAMSIZ+64]; |
| 413 | extern int errno; |
| 414 | |
| 415 | if (!hflag) |
| 416 | i = lstat(shortname, &stbuf); |
| 417 | else |
| 418 | i = stat(shortname, &stbuf); |
| 419 | if (i < 0) { |
| 420 | switch (errno) { |
| 421 | case EACCES: |
| 422 | fprintf(stderr, "tar: %s: cannot open file\n", longname); |
| 423 | break; |
| 424 | case ENOENT: |
| 425 | fprintf(stderr, "tar: %s: no such file or directory\n", |
| 426 | longname); |
| 427 | break; |
| 428 | default: |
| 429 | fprintf(stderr, "tar: %s: cannot stat file\n", longname); |
| 430 | break; |
| 431 | } |
| 432 | return; |
| 433 | } |
| 434 | if (tfile != NULL && checkupdate(longname) == 0) |
| 435 | return; |
| 436 | if (checkw('r', longname) == 0) |
| 437 | return; |
| 438 | if (Fflag && checkf(shortname, stbuf.st_mode, Fflag) == 0) |
| 439 | return; |
| 440 | |
| 441 | switch (stbuf.st_mode & S_IFMT) { |
| 442 | case S_IFDIR: |
| 443 | for (i = 0, cp = buf; *cp++ = longname[i++];) |
| 444 | ; |
| 445 | *--cp = '/'; |
| 446 | *++cp = 0 ; |
| 447 | if (!oflag) { |
| 448 | if ((cp - buf) >= NAMSIZ) { |
| 449 | fprintf(stderr, "tar: %s: file name too long\n", |
| 450 | longname); |
| 451 | return; |
| 452 | } |
| 453 | stbuf.st_size = 0; |
| 454 | tomodes(&stbuf); |
| 455 | strcpy(dblock.dbuf.name,buf); |
| 456 | sprintf(dblock.dbuf.chksum, "%6o", checksum()); |
| 457 | writetape((char *)&dblock); |
| 458 | } |
| 459 | sprintf(newparent, "%s/%s", parent, shortname); |
| 460 | chdir(shortname); |
| 461 | if ((dirp = opendir(".")) == NULL) { |
| 462 | fprintf(stderr, "tar: %s: directory read error\n", |
| 463 | longname); |
| 464 | chdir(parent); |
| 465 | return; |
| 466 | } |
| 467 | while ((dp = readdir(dirp)) != NULL && !term) { |
| 468 | if (dp->d_ino == 0) |
| 469 | continue; |
| 470 | if (!strcmp(".", dp->d_name) || |
| 471 | !strcmp("..", dp->d_name)) |
| 472 | continue; |
| 473 | strcpy(cp, dp->d_name); |
| 474 | i = telldir(dirp); |
| 475 | closedir(dirp); |
| 476 | putfile(buf, cp, newparent); |
| 477 | dirp = opendir("."); |
| 478 | seekdir(dirp, i); |
| 479 | } |
| 480 | closedir(dirp); |
| 481 | chdir(parent); |
| 482 | break; |
| 483 | |
| 484 | case S_IFLNK: |
| 485 | tomodes(&stbuf); |
| 486 | if (strlen(longname) >= NAMSIZ) { |
| 487 | fprintf(stderr, "tar: %s: file name too long\n", |
| 488 | longname); |
| 489 | return; |
| 490 | } |
| 491 | strcpy(dblock.dbuf.name, longname); |
| 492 | if (stbuf.st_size + 1 >= NAMSIZ) { |
| 493 | fprintf(stderr, "tar: %s: symbolic link too long\n", |
| 494 | longname); |
| 495 | return; |
| 496 | } |
| 497 | i = readlink(shortname, dblock.dbuf.linkname, NAMSIZ - 1); |
| 498 | if (i < 0) { |
| 499 | perror(longname); |
| 500 | return; |
| 501 | } |
| 502 | dblock.dbuf.linkname[i] = '\0'; |
| 503 | dblock.dbuf.linkflag = '2'; |
| 504 | if (vflag) { |
| 505 | fprintf(stderr, "a %s ", longname); |
| 506 | fprintf(stderr, "symbolic link to %s\n", |
| 507 | dblock.dbuf.linkname); |
| 508 | } |
| 509 | sprintf(dblock.dbuf.size, "%11lo", 0); |
| 510 | sprintf(dblock.dbuf.chksum, "%6o", checksum()); |
| 511 | writetape((char *)&dblock); |
| 512 | break; |
| 513 | |
| 514 | case S_IFREG: |
| 515 | if ((infile = open(shortname, 0)) < 0) { |
| 516 | fprintf(stderr, "tar: %s: cannot open file\n", longname); |
| 517 | return; |
| 518 | } |
| 519 | tomodes(&stbuf); |
| 520 | if (strlen(longname) >= NAMSIZ) { |
| 521 | fprintf(stderr, "tar: %s: file name too long\n", |
| 522 | longname); |
| 523 | return; |
| 524 | } |
| 525 | strcpy(dblock.dbuf.name, longname); |
| 526 | if (stbuf.st_nlink > 1) { |
| 527 | struct linkbuf *lp; |
| 528 | int found = 0; |
| 529 | |
| 530 | for (lp = ihead; lp != NULL; lp = lp->nextp) |
| 531 | if (lp->inum == stbuf.st_ino && |
| 532 | lp->devnum == stbuf.st_dev) { |
| 533 | found++; |
| 534 | break; |
| 535 | } |
| 536 | if (found) { |
| 537 | strcpy(dblock.dbuf.linkname, lp->pathname); |
| 538 | dblock.dbuf.linkflag = '1'; |
| 539 | sprintf(dblock.dbuf.chksum, "%6o", checksum()); |
| 540 | writetape( (char *) &dblock); |
| 541 | if (vflag) { |
| 542 | fprintf(stderr, "a %s ", longname); |
| 543 | fprintf(stderr, "link to %s\n", |
| 544 | lp->pathname); |
| 545 | } |
| 546 | lp->count--; |
| 547 | close(infile); |
| 548 | return; |
| 549 | } |
| 550 | lp = (struct linkbuf *) malloc(sizeof(*lp)); |
| 551 | if (lp == NULL) { |
| 552 | if (freemem) { |
| 553 | fprintf(stderr, |
| 554 | "tar: out of memory, link information lost\n"); |
| 555 | freemem = 0; |
| 556 | } |
| 557 | } else { |
| 558 | lp->nextp = ihead; |
| 559 | ihead = lp; |
| 560 | lp->inum = stbuf.st_ino; |
| 561 | lp->devnum = stbuf.st_dev; |
| 562 | lp->count = stbuf.st_nlink - 1; |
| 563 | strcpy(lp->pathname, longname); |
| 564 | } |
| 565 | } |
| 566 | blocks = (stbuf.st_size + (TBLOCK-1)) / TBLOCK; |
| 567 | if (vflag) { |
| 568 | fprintf(stderr, "a %s ", longname); |
| 569 | fprintf(stderr, "%ld blocks\n", blocks); |
| 570 | } |
| 571 | sprintf(dblock.dbuf.chksum, "%6o", checksum()); |
| 572 | writetape((char *)&dblock); |
| 573 | |
| 574 | while ((i = read(infile, buf, TBLOCK)) > 0 && blocks > 0) { |
| 575 | writetape(buf); |
| 576 | blocks--; |
| 577 | } |
| 578 | close(infile); |
| 579 | if (blocks != 0 || i != 0) |
| 580 | fprintf(stderr, "tar: %s: file changed size\n", |
| 581 | longname); |
| 582 | while (--blocks >= 0) |
| 583 | putempty(); |
| 584 | break; |
| 585 | |
| 586 | default: |
| 587 | fprintf(stderr, "tar: %s is not a file. Not dumped\n", |
| 588 | longname); |
| 589 | break; |
| 590 | } |
| 591 | } |
| 592 | |
| 593 | doxtract(argv) |
| 594 | char *argv[]; |
| 595 | { |
| 596 | long blocks, bytes; |
| 597 | char buf[TBLOCK]; |
| 598 | char **cp; |
| 599 | int ofile; |
| 600 | |
| 601 | for (;;) { |
| 602 | getdir(); |
| 603 | if (endtape()) |
| 604 | break; |
| 605 | if (*argv == 0) |
| 606 | goto gotit; |
| 607 | for (cp = argv; *cp; cp++) |
| 608 | if (prefix(*cp, dblock.dbuf.name)) |
| 609 | goto gotit; |
| 610 | passtape(); |
| 611 | continue; |
| 612 | |
| 613 | gotit: |
| 614 | if (checkw('x', dblock.dbuf.name) == 0) { |
| 615 | passtape(); |
| 616 | continue; |
| 617 | } |
| 618 | if (Fflag) { |
| 619 | char *s; |
| 620 | |
| 621 | if ((s = rindex(dblock.dbuf.name, '/')) == 0) |
| 622 | s = dblock.dbuf.name; |
| 623 | else |
| 624 | s++; |
| 625 | if (checkf(s, stbuf.st_mode, Fflag) == 0) { |
| 626 | passtape(); |
| 627 | continue; |
| 628 | } |
| 629 | } |
| 630 | if (checkdir(dblock.dbuf.name)) |
| 631 | continue; |
| 632 | if (dblock.dbuf.linkflag == '2') { |
| 633 | unlink(dblock.dbuf.name); |
| 634 | if (symlink(dblock.dbuf.linkname, dblock.dbuf.name)<0) { |
| 635 | fprintf(stderr, "tar: %s: symbolic link failed\n", |
| 636 | dblock.dbuf.name); |
| 637 | continue; |
| 638 | } |
| 639 | if (vflag) |
| 640 | fprintf(stderr, "x %s symbolic link to %s\n", |
| 641 | dblock.dbuf.name, dblock.dbuf.linkname); |
| 642 | #ifdef notdef |
| 643 | /* ignore alien orders */ |
| 644 | chown(dblock.dbuf.name, stbuf.st_uid, stbuf.st_gid); |
| 645 | if (mflag == 0) { |
| 646 | struct timeval tv[2]; |
| 647 | |
| 648 | tv[0].tv_sec = time(0); |
| 649 | tv[0].tv_usec = 0; |
| 650 | tv[1].tv_sec = stbuf.st_mtime; |
| 651 | tv[1].tv_usec = 0; |
| 652 | utimes(dblock.dbuf.name, tv); |
| 653 | } |
| 654 | if (pflag) |
| 655 | chmod(dblock.dbuf.name, stbuf.st_mode & 07777); |
| 656 | #endif |
| 657 | continue; |
| 658 | } |
| 659 | if (dblock.dbuf.linkflag == '1') { |
| 660 | unlink(dblock.dbuf.name); |
| 661 | if (link(dblock.dbuf.linkname, dblock.dbuf.name) < 0) { |
| 662 | fprintf(stderr, "tar: %s: cannot link\n", |
| 663 | dblock.dbuf.name); |
| 664 | continue; |
| 665 | } |
| 666 | if (vflag) |
| 667 | fprintf(stderr, "%s linked to %s\n", |
| 668 | dblock.dbuf.name, dblock.dbuf.linkname); |
| 669 | continue; |
| 670 | } |
| 671 | if ((ofile = creat(dblock.dbuf.name,stbuf.st_mode&0xfff)) < 0) { |
| 672 | fprintf(stderr, "tar: %s - cannot create\n", |
| 673 | dblock.dbuf.name); |
| 674 | passtape(); |
| 675 | continue; |
| 676 | } |
| 677 | chown(dblock.dbuf.name, stbuf.st_uid, stbuf.st_gid); |
| 678 | blocks = ((bytes = stbuf.st_size) + TBLOCK-1)/TBLOCK; |
| 679 | if (vflag) |
| 680 | fprintf(stderr, "x %s, %ld bytes, %ld tape blocks\n", |
| 681 | dblock.dbuf.name, bytes, blocks); |
| 682 | for (; blocks-- > 0; bytes -= TBLOCK) { |
| 683 | readtape(buf); |
| 684 | if (bytes > TBLOCK) { |
| 685 | if (write(ofile, buf, TBLOCK) < 0) { |
| 686 | fprintf(stderr, |
| 687 | "tar: %s: HELP - extract write error\n", |
| 688 | dblock.dbuf.name); |
| 689 | done(2); |
| 690 | } |
| 691 | continue; |
| 692 | } |
| 693 | if (write(ofile, buf, (int) bytes) < 0) { |
| 694 | fprintf(stderr, |
| 695 | "tar: %s: HELP - extract write error\n", |
| 696 | dblock.dbuf.name); |
| 697 | done(2); |
| 698 | } |
| 699 | } |
| 700 | close(ofile); |
| 701 | if (mflag == 0) { |
| 702 | struct timeval tv[2]; |
| 703 | |
| 704 | tv[0].tv_sec = time(0); |
| 705 | tv[0].tv_usec = 0; |
| 706 | tv[1].tv_sec = stbuf.st_mtime; |
| 707 | tv[1].tv_usec = 0; |
| 708 | utimes(dblock.dbuf.name, tv); |
| 709 | } |
| 710 | if (pflag) |
| 711 | chmod(dblock.dbuf.name, stbuf.st_mode & 07777); |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | dotable() |
| 716 | { |
| 717 | for (;;) { |
| 718 | getdir(); |
| 719 | if (endtape()) |
| 720 | break; |
| 721 | if (vflag) |
| 722 | longt(&stbuf); |
| 723 | printf("%s", dblock.dbuf.name); |
| 724 | if (dblock.dbuf.linkflag == '1') |
| 725 | printf(" linked to %s", dblock.dbuf.linkname); |
| 726 | if (dblock.dbuf.linkflag == '2') |
| 727 | printf(" symbolic link to %s", dblock.dbuf.linkname); |
| 728 | printf("\n"); |
| 729 | passtape(); |
| 730 | } |
| 731 | } |
| 732 | |
| 733 | putempty() |
| 734 | { |
| 735 | char buf[TBLOCK]; |
| 736 | |
| 737 | bzero(buf, sizeof (buf)); |
| 738 | writetape(buf); |
| 739 | } |
| 740 | |
| 741 | longt(st) |
| 742 | register struct stat *st; |
| 743 | { |
| 744 | register char *cp; |
| 745 | char *ctime(); |
| 746 | |
| 747 | pmode(st); |
| 748 | printf("%3d/%1d", st->st_uid, st->st_gid); |
| 749 | printf("%7D", st->st_size); |
| 750 | cp = ctime(&st->st_mtime); |
| 751 | printf(" %-12.12s %-4.4s ", cp+4, cp+20); |
| 752 | } |
| 753 | |
| 754 | #define SUID 04000 |
| 755 | #define SGID 02000 |
| 756 | #define ROWN 0400 |
| 757 | #define WOWN 0200 |
| 758 | #define XOWN 0100 |
| 759 | #define RGRP 040 |
| 760 | #define WGRP 020 |
| 761 | #define XGRP 010 |
| 762 | #define ROTH 04 |
| 763 | #define WOTH 02 |
| 764 | #define XOTH 01 |
| 765 | #define STXT 01000 |
| 766 | int m1[] = { 1, ROWN, 'r', '-' }; |
| 767 | int m2[] = { 1, WOWN, 'w', '-' }; |
| 768 | int m3[] = { 2, SUID, 's', XOWN, 'x', '-' }; |
| 769 | int m4[] = { 1, RGRP, 'r', '-' }; |
| 770 | int m5[] = { 1, WGRP, 'w', '-' }; |
| 771 | int m6[] = { 2, SGID, 's', XGRP, 'x', '-' }; |
| 772 | int m7[] = { 1, ROTH, 'r', '-' }; |
| 773 | int m8[] = { 1, WOTH, 'w', '-' }; |
| 774 | int m9[] = { 2, STXT, 't', XOTH, 'x', '-' }; |
| 775 | |
| 776 | int *m[] = { m1, m2, m3, m4, m5, m6, m7, m8, m9}; |
| 777 | |
| 778 | pmode(st) |
| 779 | register struct stat *st; |
| 780 | { |
| 781 | register int **mp; |
| 782 | |
| 783 | for (mp = &m[0]; mp < &m[9];) |
| 784 | select(*mp++, st); |
| 785 | } |
| 786 | |
| 787 | select(pairp, st) |
| 788 | int *pairp; |
| 789 | struct stat *st; |
| 790 | { |
| 791 | register int n, *ap; |
| 792 | |
| 793 | ap = pairp; |
| 794 | n = *ap++; |
| 795 | while (--n>=0 && (st->st_mode&*ap++)==0) |
| 796 | ap++; |
| 797 | printf("%c", *ap); |
| 798 | } |
| 799 | |
| 800 | checkdir(name) |
| 801 | register char *name; |
| 802 | { |
| 803 | register char *cp; |
| 804 | |
| 805 | /* |
| 806 | * Quick check for existance of directory. |
| 807 | */ |
| 808 | if ((cp = rindex(name, '/')) == 0) |
| 809 | return (0); |
| 810 | *cp = '\0'; |
| 811 | if (access(name, 0) >= 0) { |
| 812 | *cp = '/'; |
| 813 | return (cp[1] == '\0'); |
| 814 | } |
| 815 | *cp = '/'; |
| 816 | |
| 817 | /* |
| 818 | * No luck, try to make all directories in path. |
| 819 | */ |
| 820 | for (cp = name; *cp; cp++) { |
| 821 | if (*cp != '/') |
| 822 | continue; |
| 823 | *cp = '\0'; |
| 824 | if (access(name, 0) < 0) { |
| 825 | if (mkdir(name, 0777) < 0) { |
| 826 | perror(name); |
| 827 | *cp = '/'; |
| 828 | return (0); |
| 829 | } |
| 830 | chown(name, stbuf.st_uid, stbuf.st_gid); |
| 831 | if (pflag) |
| 832 | chmod(name, stbuf.st_mode & 0777); |
| 833 | } |
| 834 | *cp = '/'; |
| 835 | } |
| 836 | return (cp[-1]=='/'); |
| 837 | } |
| 838 | |
| 839 | onintr() |
| 840 | { |
| 841 | signal(SIGINT, SIG_IGN); |
| 842 | term++; |
| 843 | } |
| 844 | |
| 845 | onquit() |
| 846 | { |
| 847 | signal(SIGQUIT, SIG_IGN); |
| 848 | term++; |
| 849 | } |
| 850 | |
| 851 | onhup() |
| 852 | { |
| 853 | signal(SIGHUP, SIG_IGN); |
| 854 | term++; |
| 855 | } |
| 856 | |
| 857 | onterm() |
| 858 | { |
| 859 | signal(SIGTERM, SIG_IGN); |
| 860 | term++; |
| 861 | } |
| 862 | |
| 863 | tomodes(sp) |
| 864 | register struct stat *sp; |
| 865 | { |
| 866 | register char *cp; |
| 867 | |
| 868 | for (cp = dblock.dummy; cp < &dblock.dummy[TBLOCK]; cp++) |
| 869 | *cp = '\0'; |
| 870 | sprintf(dblock.dbuf.mode, "%6o ", sp->st_mode & 07777); |
| 871 | sprintf(dblock.dbuf.uid, "%6o ", sp->st_uid); |
| 872 | sprintf(dblock.dbuf.gid, "%6o ", sp->st_gid); |
| 873 | sprintf(dblock.dbuf.size, "%11lo ", sp->st_size); |
| 874 | sprintf(dblock.dbuf.mtime, "%11lo ", sp->st_mtime); |
| 875 | } |
| 876 | |
| 877 | checksum() |
| 878 | { |
| 879 | register i; |
| 880 | register char *cp; |
| 881 | |
| 882 | for (cp = dblock.dbuf.chksum; |
| 883 | cp < &dblock.dbuf.chksum[sizeof(dblock.dbuf.chksum)]; cp++) |
| 884 | *cp = ' '; |
| 885 | i = 0; |
| 886 | for (cp = dblock.dummy; cp < &dblock.dummy[TBLOCK]; cp++) |
| 887 | i += *cp; |
| 888 | return (i); |
| 889 | } |
| 890 | |
| 891 | checkw(c, name) |
| 892 | char *name; |
| 893 | { |
| 894 | if (!wflag) |
| 895 | return (1); |
| 896 | printf("%c ", c); |
| 897 | if (vflag) |
| 898 | longt(&stbuf); |
| 899 | printf("%s: ", name); |
| 900 | return (response() == 'y'); |
| 901 | } |
| 902 | |
| 903 | response() |
| 904 | { |
| 905 | char c; |
| 906 | |
| 907 | c = getchar(); |
| 908 | if (c != '\n') |
| 909 | while (getchar() != '\n') |
| 910 | ; |
| 911 | else |
| 912 | c = 'n'; |
| 913 | return (c); |
| 914 | } |
| 915 | |
| 916 | checkf(name, mode, howmuch) |
| 917 | char *name; |
| 918 | int mode, howmuch; |
| 919 | { |
| 920 | int l; |
| 921 | |
| 922 | if ((mode & S_IFMT) == S_IFDIR) |
| 923 | return (strcmp(name, "SCCS") != 0); |
| 924 | if ((l = strlen(name)) < 3) |
| 925 | return (1); |
| 926 | if (howmuch > 1 && name[l-2] == '.' && name[l-1] == 'o') |
| 927 | return (0); |
| 928 | if (strcmp(name, "core") == 0 || |
| 929 | strcmp(name, "errs") == 0 || |
| 930 | (howmuch > 1 && strcmp(name, "a.out") == 0)) |
| 931 | return (0); |
| 932 | /* SHOULD CHECK IF IT IS EXECUTABLE */ |
| 933 | return (1); |
| 934 | } |
| 935 | |
| 936 | checkupdate(arg) |
| 937 | char *arg; |
| 938 | { |
| 939 | char name[100]; |
| 940 | long mtime; |
| 941 | daddr_t seekp; |
| 942 | daddr_t lookup(); |
| 943 | |
| 944 | rewind(tfile); |
| 945 | for (;;) { |
| 946 | if ((seekp = lookup(arg)) < 0) |
| 947 | return (1); |
| 948 | fseek(tfile, seekp, 0); |
| 949 | fscanf(tfile, "%s %lo", name, &mtime); |
| 950 | return (stbuf.st_mtime > mtime); |
| 951 | } |
| 952 | } |
| 953 | |
| 954 | done(n) |
| 955 | { |
| 956 | unlink(tname); |
| 957 | exit(n); |
| 958 | } |
| 959 | |
| 960 | prefix(s1, s2) |
| 961 | register char *s1, *s2; |
| 962 | { |
| 963 | while (*s1) |
| 964 | if (*s1++ != *s2++) |
| 965 | return (0); |
| 966 | if (*s2) |
| 967 | return (*s2 == '/'); |
| 968 | return (1); |
| 969 | } |
| 970 | |
| 971 | #define N 200 |
| 972 | int njab; |
| 973 | |
| 974 | daddr_t |
| 975 | lookup(s) |
| 976 | char *s; |
| 977 | { |
| 978 | register i; |
| 979 | daddr_t a; |
| 980 | |
| 981 | for(i=0; s[i]; i++) |
| 982 | if (s[i] == ' ') |
| 983 | break; |
| 984 | a = bsrch(s, i, low, high); |
| 985 | return (a); |
| 986 | } |
| 987 | |
| 988 | daddr_t |
| 989 | bsrch(s, n, l, h) |
| 990 | daddr_t l, h; |
| 991 | char *s; |
| 992 | { |
| 993 | register i, j; |
| 994 | char b[N]; |
| 995 | daddr_t m, m1; |
| 996 | |
| 997 | njab = 0; |
| 998 | |
| 999 | loop: |
| 1000 | if (l >= h) |
| 1001 | return (-1L); |
| 1002 | m = l + (h-l)/2 - N/2; |
| 1003 | if (m < l) |
| 1004 | m = l; |
| 1005 | fseek(tfile, m, 0); |
| 1006 | fread(b, 1, N, tfile); |
| 1007 | njab++; |
| 1008 | for(i=0; i<N; i++) { |
| 1009 | if (b[i] == '\n') |
| 1010 | break; |
| 1011 | m++; |
| 1012 | } |
| 1013 | if (m >= h) |
| 1014 | return (-1L); |
| 1015 | m1 = m; |
| 1016 | j = i; |
| 1017 | for(i++; i<N; i++) { |
| 1018 | m1++; |
| 1019 | if (b[i] == '\n') |
| 1020 | break; |
| 1021 | } |
| 1022 | i = cmp(b+j, s, n); |
| 1023 | if (i < 0) { |
| 1024 | h = m; |
| 1025 | goto loop; |
| 1026 | } |
| 1027 | if (i > 0) { |
| 1028 | l = m1; |
| 1029 | goto loop; |
| 1030 | } |
| 1031 | return (m); |
| 1032 | } |
| 1033 | |
| 1034 | cmp(b, s, n) |
| 1035 | char *b, *s; |
| 1036 | { |
| 1037 | register i; |
| 1038 | |
| 1039 | if (b[0] != '\n') |
| 1040 | exit(2); |
| 1041 | for(i=0; i<n; i++) { |
| 1042 | if (b[i+1] > s[i]) |
| 1043 | return (-1); |
| 1044 | if (b[i+1] < s[i]) |
| 1045 | return (1); |
| 1046 | } |
| 1047 | return (b[i+1] == ' '? 0 : -1); |
| 1048 | } |
| 1049 | |
| 1050 | readtape(buffer) |
| 1051 | char *buffer; |
| 1052 | { |
| 1053 | register int i; |
| 1054 | |
| 1055 | if (recno >= nblock || first == 0) { |
| 1056 | if ((i = bread(mt, tbuf, TBLOCK*nblock)) < 0) { |
| 1057 | fprintf(stderr, "tar: tape read error\n"); |
| 1058 | done(3); |
| 1059 | } |
| 1060 | if (first == 0) { |
| 1061 | if ((i % TBLOCK) != 0) { |
| 1062 | fprintf(stderr, "tar: tape blocksize error\n"); |
| 1063 | done(3); |
| 1064 | } |
| 1065 | i /= TBLOCK; |
| 1066 | if (i != nblock) { |
| 1067 | fprintf(stderr, "tar: blocksize = %d\n", i); |
| 1068 | nblock = i; |
| 1069 | } |
| 1070 | } |
| 1071 | recno = 0; |
| 1072 | } |
| 1073 | first = 1; |
| 1074 | bcopy((char *)&tbuf[recno++], buffer, TBLOCK); |
| 1075 | return (TBLOCK); |
| 1076 | } |
| 1077 | |
| 1078 | writetape(buffer) |
| 1079 | char *buffer; |
| 1080 | { |
| 1081 | first = 1; |
| 1082 | if (recno >= nblock) { |
| 1083 | if (write(mt, tbuf, TBLOCK*nblock) < 0) { |
| 1084 | fprintf(stderr, "tar: tape write error\n"); |
| 1085 | done(2); |
| 1086 | } |
| 1087 | recno = 0; |
| 1088 | } |
| 1089 | bcopy(buffer, (char *)&tbuf[recno++], TBLOCK); |
| 1090 | if (recno >= nblock) { |
| 1091 | if (write(mt, tbuf, TBLOCK*nblock) < 0) { |
| 1092 | fprintf(stderr, "tar: tape write error\n"); |
| 1093 | done(2); |
| 1094 | } |
| 1095 | recno = 0; |
| 1096 | } |
| 1097 | return (TBLOCK); |
| 1098 | } |
| 1099 | |
| 1100 | backtape() |
| 1101 | { |
| 1102 | static int mtdev = 1; |
| 1103 | static struct mtop mtop = {MTBSR, 1}; |
| 1104 | struct mtget mtget; |
| 1105 | |
| 1106 | if (mtdev == 1) |
| 1107 | mtdev = ioctl(mt, MTIOCGET, &mtget); |
| 1108 | if (mtdev == 0) { |
| 1109 | if (ioctl(mt, MTIOCTOP, &mtop) < 0) { |
| 1110 | fprintf(stderr, "tar: tape backspace error\n"); |
| 1111 | done(4); |
| 1112 | } |
| 1113 | } else |
| 1114 | lseek(mt, (long) -TBLOCK*nblock, 1); |
| 1115 | recno--; |
| 1116 | } |
| 1117 | |
| 1118 | flushtape() |
| 1119 | { |
| 1120 | write(mt, tbuf, TBLOCK*nblock); |
| 1121 | } |
| 1122 | |
| 1123 | bread(fd, buf, size) |
| 1124 | int fd; |
| 1125 | char *buf; |
| 1126 | int size; |
| 1127 | { |
| 1128 | int count; |
| 1129 | static int lastread = 0; |
| 1130 | |
| 1131 | if (!Bflag) |
| 1132 | return (read(fd, buf, size)); |
| 1133 | for (count = 0; count < size; count += lastread) { |
| 1134 | if (lastread < 0) { |
| 1135 | if (count > 0) |
| 1136 | return (count); |
| 1137 | return (lastread); |
| 1138 | } |
| 1139 | lastread = read(fd, buf, size - count); |
| 1140 | buf += lastread; |
| 1141 | } |
| 1142 | return (count); |
| 1143 | } |
| 1144 | |
| 1145 | char * |
| 1146 | getcwd(buf) |
| 1147 | char *buf; |
| 1148 | { |
| 1149 | |
| 1150 | if (getwd(buf) == NULL) { |
| 1151 | fprintf(stderr, "tar: %s\n", buf); |
| 1152 | exit(1); |
| 1153 | } |
| 1154 | return (buf); |
| 1155 | } |