| 1 | #ifndef lint |
| 2 | static char *sccsid = "@(#)tar.c 4.22 (Berkeley) %G%"; |
| 3 | #endif |
| 4 | |
| 5 | /* |
| 6 | * T A R . C |
| 7 | * |
| 8 | * $Revision: 1.4 $ |
| 9 | * |
| 10 | * $Log: tar.c,v $ |
| 11 | * Revision 1.4 84/11/14 00:08:15 root |
| 12 | * New more efficient version. Minimizes the number of bcopys |
| 13 | * and maximizes block buffering. Page aligns block buffers. |
| 14 | * |
| 15 | * Revision 1.3 84/02/23 20:24:42 dpk |
| 16 | * Added missing close(infile) to prevent running out of fd's |
| 17 | * |
| 18 | * Revision 1.2 84/02/23 20:17:02 dpk |
| 19 | * Added distinctive RCS header |
| 20 | * |
| 21 | */ |
| 22 | #ifndef lint |
| 23 | static char RCSid[] = "@(#)$Header: tar.c,v 1.4 84/11/14 00:08:15 root Exp $"; |
| 24 | #endif |
| 25 | |
| 26 | |
| 27 | /* |
| 28 | * Tape Archival Program |
| 29 | */ |
| 30 | #include <stdio.h> |
| 31 | #include <sys/param.h> |
| 32 | #include <sys/stat.h> |
| 33 | #include <sys/dir.h> |
| 34 | #include <sys/ioctl.h> |
| 35 | #include <sys/mtio.h> |
| 36 | #include <sys/time.h> |
| 37 | #include <signal.h> |
| 38 | #include <errno.h> |
| 39 | |
| 40 | #define TBLOCK 512 |
| 41 | #define NBLOCK 20 |
| 42 | #define NAMSIZ 100 |
| 43 | |
| 44 | #define writetape(b) writetbuf(b, 1) |
| 45 | #define min(a,b) ((a) < (b) ? (a) : (b)) |
| 46 | #define max(a,b) ((a) > (b) ? (a) : (b)) |
| 47 | |
| 48 | union hblock { |
| 49 | char dummy[TBLOCK]; |
| 50 | struct header { |
| 51 | char name[NAMSIZ]; |
| 52 | char mode[8]; |
| 53 | char uid[8]; |
| 54 | char gid[8]; |
| 55 | char size[12]; |
| 56 | char mtime[12]; |
| 57 | char chksum[8]; |
| 58 | char linkflag; |
| 59 | char linkname[NAMSIZ]; |
| 60 | } dbuf; |
| 61 | }; |
| 62 | |
| 63 | struct linkbuf { |
| 64 | ino_t inum; |
| 65 | dev_t devnum; |
| 66 | int count; |
| 67 | char pathname[NAMSIZ]; |
| 68 | struct linkbuf *nextp; |
| 69 | }; |
| 70 | |
| 71 | union hblock dblock; |
| 72 | union hblock *tbuf; |
| 73 | struct linkbuf *ihead; |
| 74 | struct stat stbuf; |
| 75 | |
| 76 | int rflag; |
| 77 | int xflag; |
| 78 | int vflag; |
| 79 | int tflag; |
| 80 | int cflag; |
| 81 | int mflag; |
| 82 | int fflag; |
| 83 | int iflag; |
| 84 | int oflag; |
| 85 | int pflag; |
| 86 | int wflag; |
| 87 | int hflag; |
| 88 | int Bflag; |
| 89 | int Fflag; |
| 90 | |
| 91 | int mt; |
| 92 | int term; |
| 93 | int chksum; |
| 94 | int recno; |
| 95 | int first; |
| 96 | int linkerrok; |
| 97 | int freemem = 1; |
| 98 | int nblock = NBLOCK; |
| 99 | int onintr(); |
| 100 | int onquit(); |
| 101 | int onhup(); |
| 102 | int onterm(); |
| 103 | |
| 104 | daddr_t low; |
| 105 | daddr_t high; |
| 106 | daddr_t bsrch(); |
| 107 | |
| 108 | FILE *tfile; |
| 109 | char tname[] = "/tmp/tarXXXXXX"; |
| 110 | char *usefile; |
| 111 | char magtape[] = "/dev/rmt8"; |
| 112 | char *malloc(); |
| 113 | char *sprintf(); |
| 114 | char *strcat(); |
| 115 | char *rindex(); |
| 116 | char *getcwd(); |
| 117 | char *getwd(); |
| 118 | |
| 119 | main(argc, argv) |
| 120 | int argc; |
| 121 | char *argv[]; |
| 122 | { |
| 123 | char *cp; |
| 124 | |
| 125 | if (argc < 2) |
| 126 | usage(); |
| 127 | |
| 128 | tfile = NULL; |
| 129 | usefile = magtape; |
| 130 | argv[argc] = 0; |
| 131 | argv++; |
| 132 | for (cp = *argv++; *cp; cp++) |
| 133 | switch(*cp) { |
| 134 | |
| 135 | case 'f': |
| 136 | if (*argv == 0) { |
| 137 | fprintf(stderr, |
| 138 | "tar: tapefile must be specified with 'f' option\n"); |
| 139 | usage(); |
| 140 | } |
| 141 | usefile = *argv++; |
| 142 | fflag++; |
| 143 | break; |
| 144 | |
| 145 | case 'c': |
| 146 | cflag++; |
| 147 | rflag++; |
| 148 | break; |
| 149 | |
| 150 | case 'o': |
| 151 | oflag++; |
| 152 | break; |
| 153 | |
| 154 | case 'p': |
| 155 | pflag++; |
| 156 | break; |
| 157 | |
| 158 | case 'u': |
| 159 | mktemp(tname); |
| 160 | if ((tfile = fopen(tname, "w")) == NULL) { |
| 161 | fprintf(stderr, |
| 162 | "Tar: cannot create temporary file (%s)\n", |
| 163 | tname); |
| 164 | done(1); |
| 165 | } |
| 166 | fprintf(tfile, "!!!!!/!/!/!/!/!/!/! 000\n"); |
| 167 | /*FALL THRU*/ |
| 168 | |
| 169 | case 'r': |
| 170 | rflag++; |
| 171 | break; |
| 172 | |
| 173 | case 'v': |
| 174 | vflag++; |
| 175 | break; |
| 176 | |
| 177 | case 'w': |
| 178 | wflag++; |
| 179 | break; |
| 180 | |
| 181 | case 'x': |
| 182 | xflag++; |
| 183 | break; |
| 184 | |
| 185 | case 't': |
| 186 | tflag++; |
| 187 | break; |
| 188 | |
| 189 | case 'm': |
| 190 | mflag++; |
| 191 | break; |
| 192 | |
| 193 | case '-': |
| 194 | break; |
| 195 | |
| 196 | case '0': |
| 197 | case '1': |
| 198 | case '4': |
| 199 | case '5': |
| 200 | case '7': |
| 201 | case '8': |
| 202 | magtape[8] = *cp; |
| 203 | usefile = magtape; |
| 204 | break; |
| 205 | |
| 206 | case 'b': |
| 207 | if (*argv == 0) { |
| 208 | fprintf(stderr, |
| 209 | "tar: blocksize must be specified with 'b' option\n"); |
| 210 | usage(); |
| 211 | } |
| 212 | nblock = atoi(*argv); |
| 213 | if (nblock <= 0) { |
| 214 | fprintf(stderr, |
| 215 | "tar: invalid blocksize \"%s\"\n", *argv); |
| 216 | done(1); |
| 217 | } |
| 218 | argv++; |
| 219 | break; |
| 220 | |
| 221 | case 'l': |
| 222 | linkerrok++; |
| 223 | break; |
| 224 | |
| 225 | case 'h': |
| 226 | hflag++; |
| 227 | break; |
| 228 | |
| 229 | case 'i': |
| 230 | iflag++; |
| 231 | break; |
| 232 | |
| 233 | case 'B': |
| 234 | Bflag++; |
| 235 | break; |
| 236 | |
| 237 | case 'F': |
| 238 | Fflag++; |
| 239 | break; |
| 240 | |
| 241 | default: |
| 242 | fprintf(stderr, "tar: %c: unknown option\n", *cp); |
| 243 | usage(); |
| 244 | } |
| 245 | |
| 246 | if (!rflag && !xflag && !tflag) |
| 247 | usage(); |
| 248 | #ifndef vax |
| 249 | tbuf = (union hblock *)malloc(nblock*TBLOCK); |
| 250 | #else |
| 251 | /* |
| 252 | * The following is for 4.2BSD and related systems to force |
| 253 | * the buffer to be page aligned. The kernel will avoid |
| 254 | * bcopy()'s on disk IO this way by manipulating the page tables. |
| 255 | */ |
| 256 | { |
| 257 | int pagesize = getpagesize(); |
| 258 | |
| 259 | tbuf = (union hblock *)malloc((nblock*TBLOCK)+pagesize); |
| 260 | tbuf = (union hblock *)(((int)tbuf+pagesize)&~(pagesize-1)); |
| 261 | } |
| 262 | #endif vax |
| 263 | if (tbuf == NULL) { |
| 264 | fprintf(stderr, "tar: blocksize %d too big, can't get memory\n", |
| 265 | nblock); |
| 266 | done(1); |
| 267 | } |
| 268 | if (rflag) { |
| 269 | if (cflag && tfile != NULL) |
| 270 | usage(); |
| 271 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) |
| 272 | signal(SIGINT, onintr); |
| 273 | if (signal(SIGHUP, SIG_IGN) != SIG_IGN) |
| 274 | signal(SIGHUP, onhup); |
| 275 | if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) |
| 276 | signal(SIGQUIT, onquit); |
| 277 | #ifdef notdef |
| 278 | if (signal(SIGTERM, SIG_IGN) != SIG_IGN) |
| 279 | signal(SIGTERM, onterm); |
| 280 | #endif |
| 281 | if (strcmp(usefile, "-") == 0) { |
| 282 | if (cflag == 0) { |
| 283 | fprintf(stderr, |
| 284 | "tar: can only create standard output archives\n"); |
| 285 | done(1); |
| 286 | } |
| 287 | mt = dup(1); |
| 288 | nblock = 1; |
| 289 | } else if ((mt = open(usefile, 2)) < 0) { |
| 290 | if (cflag == 0 || (mt = creat(usefile, 0666)) < 0) { |
| 291 | fprintf(stderr, |
| 292 | "tar: cannot open %s\n", usefile); |
| 293 | done(1); |
| 294 | } |
| 295 | } |
| 296 | dorep(argv); |
| 297 | done(0); |
| 298 | } |
| 299 | if (strcmp(usefile, "-") == 0) { |
| 300 | mt = dup(0); |
| 301 | nblock = 1; |
| 302 | } else if ((mt = open(usefile, 0)) < 0) { |
| 303 | fprintf(stderr, "tar: cannot open %s\n", usefile); |
| 304 | done(1); |
| 305 | } |
| 306 | if (xflag) |
| 307 | doxtract(argv); |
| 308 | else |
| 309 | dotable(); |
| 310 | done(0); |
| 311 | } |
| 312 | |
| 313 | usage() |
| 314 | { |
| 315 | fprintf(stderr, |
| 316 | "tar: usage: tar -{txru}[cvfblmhopwBi] [tapefile] [blocksize] file1 file2...\n"); |
| 317 | done(1); |
| 318 | } |
| 319 | |
| 320 | dorep(argv) |
| 321 | char *argv[]; |
| 322 | { |
| 323 | register char *cp, *cp2; |
| 324 | char wdir[MAXPATHLEN], tempdir[MAXPATHLEN], *parent; |
| 325 | |
| 326 | if (!cflag) { |
| 327 | getdir(); |
| 328 | do { |
| 329 | passtape(); |
| 330 | if (term) |
| 331 | done(0); |
| 332 | getdir(); |
| 333 | } while (!endtape()); |
| 334 | backtape(); |
| 335 | if (tfile != NULL) { |
| 336 | char buf[200]; |
| 337 | |
| 338 | sprintf(buf, |
| 339 | "sort +0 -1 +1nr %s -o %s; awk '$1 != prev {print; prev=$1}' %s >%sX; mv %sX %s", |
| 340 | tname, tname, tname, tname, tname, tname); |
| 341 | fflush(tfile); |
| 342 | system(buf); |
| 343 | freopen(tname, "r", tfile); |
| 344 | fstat(fileno(tfile), &stbuf); |
| 345 | high = stbuf.st_size; |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | (void) getcwd(wdir); |
| 350 | while (*argv && ! term) { |
| 351 | cp2 = *argv; |
| 352 | if (!strcmp(cp2, "-C") && argv[1]) { |
| 353 | argv++; |
| 354 | if (chdir(*argv) < 0) |
| 355 | perror(*argv); |
| 356 | else |
| 357 | (void) getcwd(wdir); |
| 358 | argv++; |
| 359 | continue; |
| 360 | } |
| 361 | parent = wdir; |
| 362 | for (cp = *argv; *cp; cp++) |
| 363 | if (*cp == '/') |
| 364 | cp2 = cp; |
| 365 | if (cp2 != *argv) { |
| 366 | *cp2 = '\0'; |
| 367 | if (chdir(*argv) < 0) { |
| 368 | perror(*argv); |
| 369 | continue; |
| 370 | } |
| 371 | parent = getcwd(tempdir); |
| 372 | *cp2 = '/'; |
| 373 | cp2++; |
| 374 | } |
| 375 | putfile(*argv++, cp2, parent); |
| 376 | if (chdir(wdir) < 0) { |
| 377 | fprintf(stderr, "cannot change back?: "); |
| 378 | perror(wdir); |
| 379 | } |
| 380 | } |
| 381 | putempty(); |
| 382 | putempty(); |
| 383 | flushtape(); |
| 384 | if (linkerrok == 0) |
| 385 | return; |
| 386 | for (; ihead != NULL; ihead = ihead->nextp) { |
| 387 | if (ihead->count == 0) |
| 388 | continue; |
| 389 | fprintf(stderr, "tar: missing links to %s\n", ihead->pathname); |
| 390 | } |
| 391 | } |
| 392 | |
| 393 | endtape() |
| 394 | { |
| 395 | return (dblock.dbuf.name[0] == '\0'); |
| 396 | } |
| 397 | |
| 398 | getdir() |
| 399 | { |
| 400 | register struct stat *sp; |
| 401 | int i; |
| 402 | |
| 403 | top: |
| 404 | readtape((char *)&dblock); |
| 405 | if (dblock.dbuf.name[0] == '\0') |
| 406 | return; |
| 407 | sp = &stbuf; |
| 408 | sscanf(dblock.dbuf.mode, "%o", &i); |
| 409 | sp->st_mode = i; |
| 410 | sscanf(dblock.dbuf.uid, "%o", &i); |
| 411 | sp->st_uid = i; |
| 412 | sscanf(dblock.dbuf.gid, "%o", &i); |
| 413 | sp->st_gid = i; |
| 414 | sscanf(dblock.dbuf.size, "%lo", &sp->st_size); |
| 415 | sscanf(dblock.dbuf.mtime, "%lo", &sp->st_mtime); |
| 416 | sscanf(dblock.dbuf.chksum, "%o", &chksum); |
| 417 | if (chksum != (i = checksum())) { |
| 418 | fprintf(stderr, "tar: directory checksum error (%d != %d)\n", |
| 419 | chksum, i); |
| 420 | if (iflag) |
| 421 | goto top; |
| 422 | done(2); |
| 423 | } |
| 424 | if (tfile != NULL) |
| 425 | fprintf(tfile, "%s %s\n", dblock.dbuf.name, dblock.dbuf.mtime); |
| 426 | } |
| 427 | |
| 428 | passtape() |
| 429 | { |
| 430 | long blocks; |
| 431 | char *bufp; |
| 432 | |
| 433 | if (dblock.dbuf.linkflag == '1') |
| 434 | return; |
| 435 | blocks = stbuf.st_size; |
| 436 | blocks += TBLOCK-1; |
| 437 | blocks /= TBLOCK; |
| 438 | |
| 439 | while (blocks-- > 0) |
| 440 | readtbuf(&bufp, TBLOCK); |
| 441 | } |
| 442 | |
| 443 | putfile(longname, shortname, parent) |
| 444 | char *longname; |
| 445 | char *shortname; |
| 446 | char *parent; |
| 447 | { |
| 448 | int infile = 0; |
| 449 | long blocks; |
| 450 | char buf[TBLOCK]; |
| 451 | #ifdef vax |
| 452 | char *origbuf; |
| 453 | #endif |
| 454 | char *bigbuf; |
| 455 | register char *cp, *cp2; |
| 456 | struct direct *dp; |
| 457 | DIR *dirp; |
| 458 | int i, j; |
| 459 | char newparent[NAMSIZ+64]; |
| 460 | extern int errno; |
| 461 | int maxread; |
| 462 | int hint; /* amount to write to get "in sync" */ |
| 463 | |
| 464 | if (!hflag) |
| 465 | i = lstat(shortname, &stbuf); |
| 466 | else |
| 467 | i = stat(shortname, &stbuf); |
| 468 | if (i < 0) { |
| 469 | switch (errno) { |
| 470 | case EACCES: |
| 471 | fprintf(stderr, "tar: %s: cannot open file\n", longname); |
| 472 | break; |
| 473 | case ENOENT: |
| 474 | fprintf(stderr, "tar: %s: no such file or directory\n", |
| 475 | longname); |
| 476 | break; |
| 477 | default: |
| 478 | fprintf(stderr, "tar: %s: cannot stat file\n", longname); |
| 479 | break; |
| 480 | } |
| 481 | return; |
| 482 | } |
| 483 | if (tfile != NULL && checkupdate(longname) == 0) |
| 484 | return; |
| 485 | if (checkw('r', longname) == 0) |
| 486 | return; |
| 487 | if (Fflag && checkf(shortname, stbuf.st_mode, Fflag) == 0) |
| 488 | return; |
| 489 | |
| 490 | switch (stbuf.st_mode & S_IFMT) { |
| 491 | case S_IFDIR: |
| 492 | for (i = 0, cp = buf; *cp++ = longname[i++];) |
| 493 | ; |
| 494 | *--cp = '/'; |
| 495 | *++cp = 0 ; |
| 496 | if (!oflag) { |
| 497 | if ((cp - buf) >= NAMSIZ) { |
| 498 | fprintf(stderr, "tar: %s: file name too long\n", |
| 499 | longname); |
| 500 | return; |
| 501 | } |
| 502 | stbuf.st_size = 0; |
| 503 | tomodes(&stbuf); |
| 504 | strcpy(dblock.dbuf.name,buf); |
| 505 | sprintf(dblock.dbuf.chksum, "%6o", checksum()); |
| 506 | writetape((char *)&dblock); |
| 507 | } |
| 508 | sprintf(newparent, "%s/%s", parent, shortname); |
| 509 | if (chdir(shortname) < 0) { |
| 510 | perror(shortname); |
| 511 | return; |
| 512 | } |
| 513 | if ((dirp = opendir(".")) == NULL) { |
| 514 | fprintf(stderr, "tar: %s: directory read error\n", |
| 515 | longname); |
| 516 | if (chdir(parent) < 0) { |
| 517 | fprintf(stderr, "cannot change back?: "); |
| 518 | perror(parent); |
| 519 | } |
| 520 | return; |
| 521 | } |
| 522 | while ((dp = readdir(dirp)) != NULL && !term) { |
| 523 | if (dp->d_ino == 0) |
| 524 | continue; |
| 525 | if (!strcmp(".", dp->d_name) || |
| 526 | !strcmp("..", dp->d_name)) |
| 527 | continue; |
| 528 | strcpy(cp, dp->d_name); |
| 529 | i = telldir(dirp); |
| 530 | closedir(dirp); |
| 531 | putfile(buf, cp, newparent); |
| 532 | dirp = opendir("."); |
| 533 | seekdir(dirp, i); |
| 534 | } |
| 535 | closedir(dirp); |
| 536 | if (chdir(parent) < 0) { |
| 537 | fprintf(stderr, "cannot change back?: "); |
| 538 | perror(parent); |
| 539 | } |
| 540 | break; |
| 541 | |
| 542 | case S_IFLNK: |
| 543 | tomodes(&stbuf); |
| 544 | if (strlen(longname) >= NAMSIZ) { |
| 545 | fprintf(stderr, "tar: %s: file name too long\n", |
| 546 | longname); |
| 547 | return; |
| 548 | } |
| 549 | strcpy(dblock.dbuf.name, longname); |
| 550 | if (stbuf.st_size + 1 >= NAMSIZ) { |
| 551 | fprintf(stderr, "tar: %s: symbolic link too long\n", |
| 552 | longname); |
| 553 | return; |
| 554 | } |
| 555 | i = readlink(shortname, dblock.dbuf.linkname, NAMSIZ - 1); |
| 556 | if (i < 0) { |
| 557 | perror(longname); |
| 558 | return; |
| 559 | } |
| 560 | dblock.dbuf.linkname[i] = '\0'; |
| 561 | dblock.dbuf.linkflag = '2'; |
| 562 | if (vflag) { |
| 563 | fprintf(stderr, "a %s ", longname); |
| 564 | fprintf(stderr, "symbolic link to %s\n", |
| 565 | dblock.dbuf.linkname); |
| 566 | } |
| 567 | sprintf(dblock.dbuf.size, "%11lo", 0); |
| 568 | sprintf(dblock.dbuf.chksum, "%6o", checksum()); |
| 569 | writetape((char *)&dblock); |
| 570 | break; |
| 571 | |
| 572 | case S_IFREG: |
| 573 | if ((infile = open(shortname, 0)) < 0) { |
| 574 | fprintf(stderr, "tar: %s: cannot open file\n", longname); |
| 575 | return; |
| 576 | } |
| 577 | tomodes(&stbuf); |
| 578 | if (strlen(longname) >= NAMSIZ) { |
| 579 | fprintf(stderr, "tar: %s: file name too long\n", |
| 580 | longname); |
| 581 | close(infile); |
| 582 | return; |
| 583 | } |
| 584 | strcpy(dblock.dbuf.name, longname); |
| 585 | if (stbuf.st_nlink > 1) { |
| 586 | struct linkbuf *lp; |
| 587 | int found = 0; |
| 588 | |
| 589 | for (lp = ihead; lp != NULL; lp = lp->nextp) |
| 590 | if (lp->inum == stbuf.st_ino && |
| 591 | lp->devnum == stbuf.st_dev) { |
| 592 | found++; |
| 593 | break; |
| 594 | } |
| 595 | if (found) { |
| 596 | strcpy(dblock.dbuf.linkname, lp->pathname); |
| 597 | dblock.dbuf.linkflag = '1'; |
| 598 | sprintf(dblock.dbuf.chksum, "%6o", checksum()); |
| 599 | writetape( (char *) &dblock); |
| 600 | if (vflag) { |
| 601 | fprintf(stderr, "a %s ", longname); |
| 602 | fprintf(stderr, "link to %s\n", |
| 603 | lp->pathname); |
| 604 | } |
| 605 | lp->count--; |
| 606 | close(infile); |
| 607 | return; |
| 608 | } |
| 609 | lp = (struct linkbuf *) malloc(sizeof(*lp)); |
| 610 | if (lp == NULL) { |
| 611 | if (freemem) { |
| 612 | fprintf(stderr, |
| 613 | "tar: out of memory, link information lost\n"); |
| 614 | freemem = 0; |
| 615 | } |
| 616 | } else { |
| 617 | lp->nextp = ihead; |
| 618 | ihead = lp; |
| 619 | lp->inum = stbuf.st_ino; |
| 620 | lp->devnum = stbuf.st_dev; |
| 621 | lp->count = stbuf.st_nlink - 1; |
| 622 | strcpy(lp->pathname, longname); |
| 623 | } |
| 624 | } |
| 625 | blocks = (stbuf.st_size + (TBLOCK-1)) / TBLOCK; |
| 626 | if (vflag) { |
| 627 | fprintf(stderr, "a %s ", longname); |
| 628 | fprintf(stderr, "%ld blocks\n", blocks); |
| 629 | } |
| 630 | sprintf(dblock.dbuf.chksum, "%6o", checksum()); |
| 631 | hint = writetape((char *)&dblock); |
| 632 | maxread = max(stbuf.st_blksize, (nblock * TBLOCK)); |
| 633 | #ifndef vax |
| 634 | if ((bigbuf = malloc(maxread)) == 0) { |
| 635 | maxread = TBLOCK; |
| 636 | bigbuf = buf; |
| 637 | } |
| 638 | #else |
| 639 | /* |
| 640 | * The following is for 4.2BSD and related systems to force |
| 641 | * the buffer to be page aligned. The kernel will avoid |
| 642 | * bcopy()'s on disk IO this way by manipulating the page tables. |
| 643 | */ |
| 644 | { |
| 645 | int pagesize = getpagesize(); |
| 646 | |
| 647 | if ((origbuf = malloc(maxread+pagesize)) == 0) { |
| 648 | maxread = TBLOCK; |
| 649 | bigbuf = buf; |
| 650 | } else { |
| 651 | bigbuf = (char *)(((int)origbuf+pagesize)&~(pagesize-1)); |
| 652 | } |
| 653 | } |
| 654 | #endif vax |
| 655 | |
| 656 | while ((i = read(infile, bigbuf, min((hint*TBLOCK), maxread))) > 0 |
| 657 | && blocks > 0) { |
| 658 | register int nblks; |
| 659 | |
| 660 | nblks = ((i-1)/TBLOCK)+1; |
| 661 | if (nblks > blocks) |
| 662 | nblks = blocks; |
| 663 | hint = writetbuf(bigbuf, nblks); |
| 664 | blocks -= nblks; |
| 665 | } |
| 666 | close(infile); |
| 667 | if (bigbuf != buf) |
| 668 | #ifndef vax |
| 669 | free(bigbuf); |
| 670 | #else |
| 671 | free(origbuf); |
| 672 | #endif |
| 673 | if (blocks != 0 || i != 0) |
| 674 | fprintf(stderr, "tar: %s: file changed size\n", |
| 675 | longname); |
| 676 | while (--blocks >= 0) |
| 677 | putempty(); |
| 678 | break; |
| 679 | |
| 680 | default: |
| 681 | fprintf(stderr, "tar: %s is not a file. Not dumped\n", |
| 682 | longname); |
| 683 | break; |
| 684 | } |
| 685 | } |
| 686 | |
| 687 | doxtract(argv) |
| 688 | char *argv[]; |
| 689 | { |
| 690 | long blocks, bytes; |
| 691 | char **cp; |
| 692 | int ofile; |
| 693 | |
| 694 | for (;;) { |
| 695 | getdir(); |
| 696 | if (endtape()) |
| 697 | break; |
| 698 | if (*argv == 0) |
| 699 | goto gotit; |
| 700 | for (cp = argv; *cp; cp++) |
| 701 | if (prefix(*cp, dblock.dbuf.name)) |
| 702 | goto gotit; |
| 703 | passtape(); |
| 704 | continue; |
| 705 | |
| 706 | gotit: |
| 707 | if (checkw('x', dblock.dbuf.name) == 0) { |
| 708 | passtape(); |
| 709 | continue; |
| 710 | } |
| 711 | if (Fflag) { |
| 712 | char *s; |
| 713 | |
| 714 | if ((s = rindex(dblock.dbuf.name, '/')) == 0) |
| 715 | s = dblock.dbuf.name; |
| 716 | else |
| 717 | s++; |
| 718 | if (checkf(s, stbuf.st_mode, Fflag) == 0) { |
| 719 | passtape(); |
| 720 | continue; |
| 721 | } |
| 722 | } |
| 723 | if (checkdir(dblock.dbuf.name)) |
| 724 | continue; |
| 725 | if (dblock.dbuf.linkflag == '2') { |
| 726 | unlink(dblock.dbuf.name); |
| 727 | if (symlink(dblock.dbuf.linkname, dblock.dbuf.name)<0) { |
| 728 | fprintf(stderr, "tar: %s: symbolic link failed\n", |
| 729 | dblock.dbuf.name); |
| 730 | continue; |
| 731 | } |
| 732 | if (vflag) |
| 733 | fprintf(stderr, "x %s symbolic link to %s\n", |
| 734 | dblock.dbuf.name, dblock.dbuf.linkname); |
| 735 | #ifdef notdef |
| 736 | /* ignore alien orders */ |
| 737 | chown(dblock.dbuf.name, stbuf.st_uid, stbuf.st_gid); |
| 738 | if (mflag == 0) { |
| 739 | struct timeval tv[2]; |
| 740 | |
| 741 | tv[0].tv_sec = time(0); |
| 742 | tv[0].tv_usec = 0; |
| 743 | tv[1].tv_sec = stbuf.st_mtime; |
| 744 | tv[1].tv_usec = 0; |
| 745 | utimes(dblock.dbuf.name, tv); |
| 746 | } |
| 747 | if (pflag) |
| 748 | chmod(dblock.dbuf.name, stbuf.st_mode & 07777); |
| 749 | #endif |
| 750 | continue; |
| 751 | } |
| 752 | if (dblock.dbuf.linkflag == '1') { |
| 753 | unlink(dblock.dbuf.name); |
| 754 | if (link(dblock.dbuf.linkname, dblock.dbuf.name) < 0) { |
| 755 | fprintf(stderr, "tar: %s: cannot link\n", |
| 756 | dblock.dbuf.name); |
| 757 | continue; |
| 758 | } |
| 759 | if (vflag) |
| 760 | fprintf(stderr, "%s linked to %s\n", |
| 761 | dblock.dbuf.name, dblock.dbuf.linkname); |
| 762 | continue; |
| 763 | } |
| 764 | if ((ofile = creat(dblock.dbuf.name,stbuf.st_mode&0xfff)) < 0) { |
| 765 | fprintf(stderr, "tar: %s - cannot create\n", |
| 766 | dblock.dbuf.name); |
| 767 | passtape(); |
| 768 | continue; |
| 769 | } |
| 770 | chown(dblock.dbuf.name, stbuf.st_uid, stbuf.st_gid); |
| 771 | blocks = ((bytes = stbuf.st_size) + TBLOCK-1)/TBLOCK; |
| 772 | if (vflag) |
| 773 | fprintf(stderr, "x %s, %ld bytes, %ld tape blocks\n", |
| 774 | dblock.dbuf.name, bytes, blocks); |
| 775 | for (; blocks > 0;) { |
| 776 | register int nread; |
| 777 | char *bufp; |
| 778 | register int nwant; |
| 779 | |
| 780 | nwant = NBLOCK*TBLOCK; |
| 781 | if (nwant > (blocks*TBLOCK)) |
| 782 | nwant = (blocks*TBLOCK); |
| 783 | nread = readtbuf(&bufp, nwant); |
| 784 | if (bytes > nread) { |
| 785 | if (write(ofile, bufp, nread) < 0) { |
| 786 | fprintf(stderr, |
| 787 | "tar: %s: HELP - extract write error\n", |
| 788 | dblock.dbuf.name); |
| 789 | done(2); |
| 790 | } |
| 791 | } else if (write(ofile, bufp, (int) bytes) < 0) { |
| 792 | fprintf(stderr, |
| 793 | "tar: %s: HELP - extract write error\n", |
| 794 | dblock.dbuf.name); |
| 795 | done(2); |
| 796 | } |
| 797 | bytes -= nread; |
| 798 | blocks -= (((nread-1)/TBLOCK)+1); |
| 799 | } |
| 800 | close(ofile); |
| 801 | if (mflag == 0) { |
| 802 | struct timeval tv[2]; |
| 803 | |
| 804 | tv[0].tv_sec = time(0); |
| 805 | tv[0].tv_usec = 0; |
| 806 | tv[1].tv_sec = stbuf.st_mtime; |
| 807 | tv[1].tv_usec = 0; |
| 808 | utimes(dblock.dbuf.name, tv); |
| 809 | } |
| 810 | if (pflag) |
| 811 | chmod(dblock.dbuf.name, stbuf.st_mode & 07777); |
| 812 | } |
| 813 | } |
| 814 | |
| 815 | dotable() |
| 816 | { |
| 817 | for (;;) { |
| 818 | getdir(); |
| 819 | if (endtape()) |
| 820 | break; |
| 821 | if (vflag) |
| 822 | longt(&stbuf); |
| 823 | printf("%s", dblock.dbuf.name); |
| 824 | if (dblock.dbuf.linkflag == '1') |
| 825 | printf(" linked to %s", dblock.dbuf.linkname); |
| 826 | if (dblock.dbuf.linkflag == '2') |
| 827 | printf(" symbolic link to %s", dblock.dbuf.linkname); |
| 828 | printf("\n"); |
| 829 | passtape(); |
| 830 | } |
| 831 | } |
| 832 | |
| 833 | putempty() |
| 834 | { |
| 835 | char buf[TBLOCK]; |
| 836 | |
| 837 | bzero(buf, sizeof (buf)); |
| 838 | writetape(buf); |
| 839 | } |
| 840 | |
| 841 | longt(st) |
| 842 | register struct stat *st; |
| 843 | { |
| 844 | register char *cp; |
| 845 | char *ctime(); |
| 846 | |
| 847 | pmode(st); |
| 848 | printf("%3d/%1d", st->st_uid, st->st_gid); |
| 849 | printf("%7D", st->st_size); |
| 850 | cp = ctime(&st->st_mtime); |
| 851 | printf(" %-12.12s %-4.4s ", cp+4, cp+20); |
| 852 | } |
| 853 | |
| 854 | #define SUID 04000 |
| 855 | #define SGID 02000 |
| 856 | #define ROWN 0400 |
| 857 | #define WOWN 0200 |
| 858 | #define XOWN 0100 |
| 859 | #define RGRP 040 |
| 860 | #define WGRP 020 |
| 861 | #define XGRP 010 |
| 862 | #define ROTH 04 |
| 863 | #define WOTH 02 |
| 864 | #define XOTH 01 |
| 865 | #define STXT 01000 |
| 866 | int m1[] = { 1, ROWN, 'r', '-' }; |
| 867 | int m2[] = { 1, WOWN, 'w', '-' }; |
| 868 | int m3[] = { 2, SUID, 's', XOWN, 'x', '-' }; |
| 869 | int m4[] = { 1, RGRP, 'r', '-' }; |
| 870 | int m5[] = { 1, WGRP, 'w', '-' }; |
| 871 | int m6[] = { 2, SGID, 's', XGRP, 'x', '-' }; |
| 872 | int m7[] = { 1, ROTH, 'r', '-' }; |
| 873 | int m8[] = { 1, WOTH, 'w', '-' }; |
| 874 | int m9[] = { 2, STXT, 't', XOTH, 'x', '-' }; |
| 875 | |
| 876 | int *m[] = { m1, m2, m3, m4, m5, m6, m7, m8, m9}; |
| 877 | |
| 878 | pmode(st) |
| 879 | register struct stat *st; |
| 880 | { |
| 881 | register int **mp; |
| 882 | |
| 883 | for (mp = &m[0]; mp < &m[9];) |
| 884 | select(*mp++, st); |
| 885 | } |
| 886 | |
| 887 | select(pairp, st) |
| 888 | int *pairp; |
| 889 | struct stat *st; |
| 890 | { |
| 891 | register int n, *ap; |
| 892 | |
| 893 | ap = pairp; |
| 894 | n = *ap++; |
| 895 | while (--n>=0 && (st->st_mode&*ap++)==0) |
| 896 | ap++; |
| 897 | printf("%c", *ap); |
| 898 | } |
| 899 | |
| 900 | checkdir(name) |
| 901 | register char *name; |
| 902 | { |
| 903 | register char *cp; |
| 904 | |
| 905 | /* |
| 906 | * Quick check for existance of directory. |
| 907 | */ |
| 908 | if ((cp = rindex(name, '/')) == 0) |
| 909 | return (0); |
| 910 | *cp = '\0'; |
| 911 | if (access(name, 0) >= 0) { |
| 912 | *cp = '/'; |
| 913 | return (cp[1] == '\0'); |
| 914 | } |
| 915 | *cp = '/'; |
| 916 | |
| 917 | /* |
| 918 | * No luck, try to make all directories in path. |
| 919 | */ |
| 920 | for (cp = name; *cp; cp++) { |
| 921 | if (*cp != '/') |
| 922 | continue; |
| 923 | *cp = '\0'; |
| 924 | if (access(name, 0) < 0) { |
| 925 | if (mkdir(name, 0777) < 0) { |
| 926 | perror(name); |
| 927 | *cp = '/'; |
| 928 | return (0); |
| 929 | } |
| 930 | chown(name, stbuf.st_uid, stbuf.st_gid); |
| 931 | if (pflag && cp[1] == '\0') |
| 932 | chmod(name, stbuf.st_mode & 0777); |
| 933 | } |
| 934 | *cp = '/'; |
| 935 | } |
| 936 | return (cp[-1]=='/'); |
| 937 | } |
| 938 | |
| 939 | onintr() |
| 940 | { |
| 941 | signal(SIGINT, SIG_IGN); |
| 942 | term++; |
| 943 | } |
| 944 | |
| 945 | onquit() |
| 946 | { |
| 947 | signal(SIGQUIT, SIG_IGN); |
| 948 | term++; |
| 949 | } |
| 950 | |
| 951 | onhup() |
| 952 | { |
| 953 | signal(SIGHUP, SIG_IGN); |
| 954 | term++; |
| 955 | } |
| 956 | |
| 957 | onterm() |
| 958 | { |
| 959 | signal(SIGTERM, SIG_IGN); |
| 960 | term++; |
| 961 | } |
| 962 | |
| 963 | tomodes(sp) |
| 964 | register struct stat *sp; |
| 965 | { |
| 966 | register char *cp; |
| 967 | |
| 968 | for (cp = dblock.dummy; cp < &dblock.dummy[TBLOCK]; cp++) |
| 969 | *cp = '\0'; |
| 970 | sprintf(dblock.dbuf.mode, "%6o ", sp->st_mode & 07777); |
| 971 | sprintf(dblock.dbuf.uid, "%6o ", sp->st_uid); |
| 972 | sprintf(dblock.dbuf.gid, "%6o ", sp->st_gid); |
| 973 | sprintf(dblock.dbuf.size, "%11lo ", sp->st_size); |
| 974 | sprintf(dblock.dbuf.mtime, "%11lo ", sp->st_mtime); |
| 975 | } |
| 976 | |
| 977 | checksum() |
| 978 | { |
| 979 | register i; |
| 980 | register char *cp; |
| 981 | |
| 982 | for (cp = dblock.dbuf.chksum; |
| 983 | cp < &dblock.dbuf.chksum[sizeof(dblock.dbuf.chksum)]; cp++) |
| 984 | *cp = ' '; |
| 985 | i = 0; |
| 986 | for (cp = dblock.dummy; cp < &dblock.dummy[TBLOCK]; cp++) |
| 987 | i += *cp; |
| 988 | return (i); |
| 989 | } |
| 990 | |
| 991 | checkw(c, name) |
| 992 | char *name; |
| 993 | { |
| 994 | if (!wflag) |
| 995 | return (1); |
| 996 | printf("%c ", c); |
| 997 | if (vflag) |
| 998 | longt(&stbuf); |
| 999 | printf("%s: ", name); |
| 1000 | return (response() == 'y'); |
| 1001 | } |
| 1002 | |
| 1003 | response() |
| 1004 | { |
| 1005 | char c; |
| 1006 | |
| 1007 | c = getchar(); |
| 1008 | if (c != '\n') |
| 1009 | while (getchar() != '\n') |
| 1010 | ; |
| 1011 | else |
| 1012 | c = 'n'; |
| 1013 | return (c); |
| 1014 | } |
| 1015 | |
| 1016 | checkf(name, mode, howmuch) |
| 1017 | char *name; |
| 1018 | int mode, howmuch; |
| 1019 | { |
| 1020 | int l; |
| 1021 | |
| 1022 | if ((mode & S_IFMT) == S_IFDIR) |
| 1023 | return (strcmp(name, "SCCS") != 0); |
| 1024 | if ((l = strlen(name)) < 3) |
| 1025 | return (1); |
| 1026 | if (howmuch > 1 && name[l-2] == '.' && name[l-1] == 'o') |
| 1027 | return (0); |
| 1028 | if (strcmp(name, "core") == 0 || |
| 1029 | strcmp(name, "errs") == 0 || |
| 1030 | (howmuch > 1 && strcmp(name, "a.out") == 0)) |
| 1031 | return (0); |
| 1032 | /* SHOULD CHECK IF IT IS EXECUTABLE */ |
| 1033 | return (1); |
| 1034 | } |
| 1035 | |
| 1036 | checkupdate(arg) |
| 1037 | char *arg; |
| 1038 | { |
| 1039 | char name[100]; |
| 1040 | long mtime; |
| 1041 | daddr_t seekp; |
| 1042 | daddr_t lookup(); |
| 1043 | |
| 1044 | rewind(tfile); |
| 1045 | for (;;) { |
| 1046 | if ((seekp = lookup(arg)) < 0) |
| 1047 | return (1); |
| 1048 | fseek(tfile, seekp, 0); |
| 1049 | fscanf(tfile, "%s %lo", name, &mtime); |
| 1050 | return (stbuf.st_mtime > mtime); |
| 1051 | } |
| 1052 | } |
| 1053 | |
| 1054 | done(n) |
| 1055 | { |
| 1056 | unlink(tname); |
| 1057 | exit(n); |
| 1058 | } |
| 1059 | |
| 1060 | prefix(s1, s2) |
| 1061 | register char *s1, *s2; |
| 1062 | { |
| 1063 | while (*s1) |
| 1064 | if (*s1++ != *s2++) |
| 1065 | return (0); |
| 1066 | if (*s2) |
| 1067 | return (*s2 == '/'); |
| 1068 | return (1); |
| 1069 | } |
| 1070 | |
| 1071 | #define N 200 |
| 1072 | int njab; |
| 1073 | |
| 1074 | daddr_t |
| 1075 | lookup(s) |
| 1076 | char *s; |
| 1077 | { |
| 1078 | register i; |
| 1079 | daddr_t a; |
| 1080 | |
| 1081 | for(i=0; s[i]; i++) |
| 1082 | if (s[i] == ' ') |
| 1083 | break; |
| 1084 | a = bsrch(s, i, low, high); |
| 1085 | return (a); |
| 1086 | } |
| 1087 | |
| 1088 | daddr_t |
| 1089 | bsrch(s, n, l, h) |
| 1090 | daddr_t l, h; |
| 1091 | char *s; |
| 1092 | { |
| 1093 | register i, j; |
| 1094 | char b[N]; |
| 1095 | daddr_t m, m1; |
| 1096 | |
| 1097 | njab = 0; |
| 1098 | |
| 1099 | loop: |
| 1100 | if (l >= h) |
| 1101 | return (-1L); |
| 1102 | m = l + (h-l)/2 - N/2; |
| 1103 | if (m < l) |
| 1104 | m = l; |
| 1105 | fseek(tfile, m, 0); |
| 1106 | fread(b, 1, N, tfile); |
| 1107 | njab++; |
| 1108 | for(i=0; i<N; i++) { |
| 1109 | if (b[i] == '\n') |
| 1110 | break; |
| 1111 | m++; |
| 1112 | } |
| 1113 | if (m >= h) |
| 1114 | return (-1L); |
| 1115 | m1 = m; |
| 1116 | j = i; |
| 1117 | for(i++; i<N; i++) { |
| 1118 | m1++; |
| 1119 | if (b[i] == '\n') |
| 1120 | break; |
| 1121 | } |
| 1122 | i = cmp(b+j, s, n); |
| 1123 | if (i < 0) { |
| 1124 | h = m; |
| 1125 | goto loop; |
| 1126 | } |
| 1127 | if (i > 0) { |
| 1128 | l = m1; |
| 1129 | goto loop; |
| 1130 | } |
| 1131 | return (m); |
| 1132 | } |
| 1133 | |
| 1134 | cmp(b, s, n) |
| 1135 | char *b, *s; |
| 1136 | { |
| 1137 | register i; |
| 1138 | |
| 1139 | if (b[0] != '\n') |
| 1140 | exit(2); |
| 1141 | for(i=0; i<n; i++) { |
| 1142 | if (b[i+1] > s[i]) |
| 1143 | return (-1); |
| 1144 | if (b[i+1] < s[i]) |
| 1145 | return (1); |
| 1146 | } |
| 1147 | return (b[i+1] == ' '? 0 : -1); |
| 1148 | } |
| 1149 | |
| 1150 | readtape (buffer) |
| 1151 | char *buffer; |
| 1152 | { |
| 1153 | char *bufp; |
| 1154 | int nread; |
| 1155 | |
| 1156 | readtbuf (&bufp, TBLOCK); |
| 1157 | bcopy(bufp, buffer, TBLOCK); |
| 1158 | return(TBLOCK); |
| 1159 | } |
| 1160 | |
| 1161 | readtbuf(bufpp, size) |
| 1162 | char **bufpp; |
| 1163 | int size; |
| 1164 | { |
| 1165 | register int i; |
| 1166 | |
| 1167 | if (recno >= nblock || first == 0) { |
| 1168 | if ((i = bread(mt, tbuf, TBLOCK*nblock)) < 0) { |
| 1169 | fprintf(stderr, "tar: tape read error\n"); |
| 1170 | done(3); |
| 1171 | } |
| 1172 | if (first == 0) { |
| 1173 | if ((i % TBLOCK) != 0) { |
| 1174 | fprintf(stderr, "tar: tape blocksize error\n"); |
| 1175 | done(3); |
| 1176 | } |
| 1177 | i /= TBLOCK; |
| 1178 | if (i != nblock) { |
| 1179 | fprintf(stderr, "tar: blocksize = %d\n", i); |
| 1180 | nblock = i; |
| 1181 | } |
| 1182 | } |
| 1183 | recno = 0; |
| 1184 | } |
| 1185 | first = 1; |
| 1186 | if (size > ((nblock-recno)*TBLOCK)) |
| 1187 | size = (nblock-recno)*TBLOCK; |
| 1188 | *bufpp = (char *)&tbuf[recno]; |
| 1189 | recno += (size/TBLOCK); |
| 1190 | return (size); |
| 1191 | } |
| 1192 | |
| 1193 | writetbuf(buffer, n) |
| 1194 | register char *buffer; |
| 1195 | register int n; |
| 1196 | { |
| 1197 | first = 1; |
| 1198 | if (recno >= nblock) { |
| 1199 | if (write(mt, tbuf, TBLOCK*nblock) < 0) { |
| 1200 | fprintf(stderr, "tar: tape write error\n"); |
| 1201 | done(2); |
| 1202 | } |
| 1203 | recno = 0; |
| 1204 | } |
| 1205 | |
| 1206 | /* |
| 1207 | * Special case: We have an empty tape buffer, and the |
| 1208 | * users data size is >= the tape block size: Avoid |
| 1209 | * the bcopy and dma direct to tape. BIG WIN. Add the |
| 1210 | * residual to the tape buffer. |
| 1211 | */ |
| 1212 | while (recno == 0 && n >= nblock) { |
| 1213 | if (write(mt, buffer, TBLOCK*nblock) < 0) { |
| 1214 | fprintf(stderr, "tar: tape write error\n"); |
| 1215 | done(2); |
| 1216 | } |
| 1217 | n -= nblock; |
| 1218 | buffer += (nblock * TBLOCK); |
| 1219 | } |
| 1220 | |
| 1221 | while (n-- > 0) { |
| 1222 | bcopy(buffer, (char *)&tbuf[recno++], TBLOCK); |
| 1223 | buffer += TBLOCK; |
| 1224 | if (recno >= nblock) { |
| 1225 | if (write(mt, tbuf, TBLOCK*nblock) < 0) { |
| 1226 | fprintf(stderr, "tar: tape write error\n"); |
| 1227 | done(2); |
| 1228 | } |
| 1229 | recno = 0; |
| 1230 | } |
| 1231 | } |
| 1232 | |
| 1233 | /* Tell the user how much to write to get in sync */ |
| 1234 | return (nblock - recno); |
| 1235 | } |
| 1236 | |
| 1237 | backtape() |
| 1238 | { |
| 1239 | static int mtdev = 1; |
| 1240 | static struct mtop mtop = {MTBSR, 1}; |
| 1241 | struct mtget mtget; |
| 1242 | |
| 1243 | if (mtdev == 1) |
| 1244 | mtdev = ioctl(mt, MTIOCGET, &mtget); |
| 1245 | if (mtdev == 0) { |
| 1246 | if (ioctl(mt, MTIOCTOP, &mtop) < 0) { |
| 1247 | fprintf(stderr, "tar: tape backspace error\n"); |
| 1248 | done(4); |
| 1249 | } |
| 1250 | } else |
| 1251 | lseek(mt, (long) -TBLOCK*nblock, 1); |
| 1252 | recno--; |
| 1253 | } |
| 1254 | |
| 1255 | flushtape() |
| 1256 | { |
| 1257 | write(mt, tbuf, TBLOCK*nblock); |
| 1258 | } |
| 1259 | |
| 1260 | bread(fd, buf, size) |
| 1261 | int fd; |
| 1262 | char *buf; |
| 1263 | int size; |
| 1264 | { |
| 1265 | int count; |
| 1266 | static int lastread = 0; |
| 1267 | |
| 1268 | if (!Bflag) |
| 1269 | return (read(fd, buf, size)); |
| 1270 | for (count = 0; count < size; count += lastread) { |
| 1271 | if (lastread < 0) { |
| 1272 | if (count > 0) |
| 1273 | return (count); |
| 1274 | return (lastread); |
| 1275 | } |
| 1276 | lastread = read(fd, buf, size - count); |
| 1277 | buf += lastread; |
| 1278 | } |
| 1279 | return (count); |
| 1280 | } |
| 1281 | |
| 1282 | char * |
| 1283 | getcwd(buf) |
| 1284 | char *buf; |
| 1285 | { |
| 1286 | |
| 1287 | if (getwd(buf) == NULL) { |
| 1288 | fprintf(stderr, "tar: %s\n", buf); |
| 1289 | exit(1); |
| 1290 | } |
| 1291 | return (buf); |
| 1292 | } |