gzip.c revision 1.55
1 /* $NetBSD: gzip.c,v 1.55 2004/07/11 07:01:03 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1997, 1998, 2003, 2004 Matthew R. Green 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 #ifndef lint 33 __COPYRIGHT("@(#) Copyright (c) 1997, 1998, 2003, 2004 Matthew R. Green\n\ 34 All rights reserved.\n"); 35 __RCSID("$NetBSD: gzip.c,v 1.55 2004/07/11 07:01:03 mrg Exp $"); 36 #endif /* not lint */ 37 38 /* 39 * gzip.c -- GPL free gzip using zlib. 40 * 41 * TODO: 42 * - handle .taz/.tgz files? 43 * - use mmap where possible 44 * - handle some signals better (remove outfile?) 45 * - make bzip2/compress -v/-t/-l support work as well as possible 46 */ 47 48 #include <sys/param.h> 49 #include <sys/stat.h> 50 #include <sys/time.h> 51 52 #include <unistd.h> 53 #include <stdio.h> 54 #include <string.h> 55 #include <stdlib.h> 56 #include <err.h> 57 #include <errno.h> 58 #include <fcntl.h> 59 #include <zlib.h> 60 #include <fts.h> 61 #include <libgen.h> 62 #include <stdarg.h> 63 #include <getopt.h> 64 65 /* what type of file are we dealing with */ 66 enum filetype { 67 FT_GZIP, 68 #ifndef NO_BZIP2_SUPPORT 69 FT_BZIP2, 70 #endif 71 #ifndef NO_COMPRESS_SUPPORT 72 FT_Z, 73 #endif 74 FT_LAST, 75 FT_UNKNOWN 76 }; 77 78 #ifndef NO_BZIP2_SUPPORT 79 #include <bzlib.h> 80 81 #define BZ2_SUFFIX ".bz2" 82 #define BZIP2_MAGIC "\102\132\150" 83 #endif 84 85 #ifndef NO_COMPRESS_SUPPORT 86 #define Z_SUFFIX ".Z" 87 #define Z_MAGIC "\037\235" 88 #endif 89 90 #define GZ_SUFFIX ".gz" 91 92 #define BUFLEN (64 * 1024) 93 94 #define GZIP_MAGIC0 0x1F 95 #define GZIP_MAGIC1 0x8B 96 #define GZIP_OMAGIC1 0x9E 97 98 #define GZIP_TIMESTAMP (off_t)4 99 #define GZIP_ORIGNAME (off_t)10 100 101 #define HEAD_CRC 0x02 102 #define EXTRA_FIELD 0x04 103 #define ORIG_NAME 0x08 104 #define COMMENT 0x10 105 106 #define OS_CODE 3 /* Unix */ 107 108 static const char gzip_version[] = "NetBSD gzip 20040711"; 109 110 static int cflag; /* stdout mode */ 111 static int dflag; /* decompress mode */ 112 static int lflag; /* list mode */ 113 static int numflag = 6; /* gzip -1..-9 value */ 114 115 #ifndef SMALL 116 static int fflag; /* force mode */ 117 static int nflag; /* don't save name/timestamp */ 118 static int Nflag; /* don't restore name/timestamp */ 119 static int qflag; /* quiet mode */ 120 static int rflag; /* recursive mode */ 121 static int tflag; /* test */ 122 static char *Sflag; 123 static int vflag; /* verbose mode */ 124 #else 125 #define qflag 0 126 #endif 127 128 static int exit_value = 0; /* exit value */ 129 130 static const char *suffix; 131 #define suffix_len (strlen(suffix) + 1) /* len + nul */ 132 static char *infile; /* name of file coming in */ 133 134 static void maybe_err(const char *fmt, ...); 135 static void maybe_errx(const char *fmt, ...); 136 static void maybe_warn(const char *fmt, ...); 137 static void maybe_warnx(const char *fmt, ...); 138 static enum filetype file_gettype(u_char *); 139 static int check_outfile(const char *outfile, struct stat *sb); 140 static off_t gz_compress(FILE *, int, off_t *, const char *, time_t); 141 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *); 142 static off_t file_compress(char *, char *, size_t); 143 static off_t file_uncompress(char *, char *, size_t); 144 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd); 145 static void handle_pathname(char *); 146 static void handle_file(char *, struct stat *); 147 static void handle_stdin(void); 148 static void handle_stdout(void); 149 static void print_ratio(off_t, off_t, FILE *); 150 static void print_list(int fd, off_t, const char *, time_t); 151 static void usage(void); 152 static void display_version(void); 153 154 #ifndef SMALL 155 static void prepend_gzip(char *, int *, char ***); 156 static void handle_dir(char *, struct stat *); 157 static void print_verbage(char *, char *, off_t, off_t); 158 static void print_test(const char *, int); 159 static void copymodes(const char *, struct stat *); 160 #endif 161 162 #ifndef NO_BZIP2_SUPPORT 163 static off_t unbzip2(int, int, char *, size_t, off_t *); 164 #endif 165 166 #ifndef NO_COMPRESS_SUPPORT 167 static FILE *zopen(const char *, FILE *); 168 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *); 169 #endif 170 171 int main(int, char *p[]); 172 173 #ifdef SMALL 174 #define getopt_long(a,b,c,d,e) getopt(a,b,c) 175 #else 176 static const struct option longopts[] = { 177 { "stdout", no_argument, 0, 'c' }, 178 { "to-stdout", no_argument, 0, 'c' }, 179 { "decompress", no_argument, 0, 'd' }, 180 { "uncompress", no_argument, 0, 'd' }, 181 { "force", no_argument, 0, 'f' }, 182 { "help", no_argument, 0, 'h' }, 183 { "list", no_argument, 0, 'l' }, 184 { "no-name", no_argument, 0, 'n' }, 185 { "name", no_argument, 0, 'N' }, 186 { "quiet", no_argument, 0, 'q' }, 187 { "recursive", no_argument, 0, 'r' }, 188 { "suffix", required_argument, 0, 'S' }, 189 { "test", no_argument, 0, 't' }, 190 { "verbose", no_argument, 0, 'v' }, 191 { "version", no_argument, 0, 'V' }, 192 { "fast", no_argument, 0, '1' }, 193 { "best", no_argument, 0, '9' }, 194 #if 0 195 /* 196 * This is what else GNU gzip implements. --ascii isn't useful 197 * on NetBSD, and I don't care to have a --license. 198 */ 199 { "ascii", no_argument, 0, 'a' }, 200 { "license", no_argument, 0, 'L' }, 201 #endif 202 { NULL, no_argument, 0, 0 }, 203 }; 204 #endif 205 206 int 207 main(int argc, char **argv) 208 { 209 const char *progname = getprogname(); 210 #ifndef SMALL 211 char *gzip; 212 #endif 213 int ch; 214 215 /* XXX set up signals */ 216 217 suffix = GZ_SUFFIX;; 218 219 #ifndef SMALL 220 if ((gzip = getenv("GZIP")) != NULL) 221 prepend_gzip(gzip, &argc, &argv); 222 #endif 223 224 /* 225 * XXX 226 * handle being called `gunzip', `zcat' and `gzcat' 227 */ 228 if (strcmp(progname, "gunzip") == 0) 229 dflag = 1; 230 else if (strcmp(progname, "zcat") == 0 || 231 strcmp(progname, "gzcat") == 0) 232 dflag = cflag = 1; 233 234 #ifdef SMALL 235 #define OPT_LIST "cdhHltV123456789" 236 #else 237 #define OPT_LIST "cdfhHlnNqrS:tvV123456789" 238 #endif 239 240 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) 241 switch (ch) { 242 case 'c': 243 cflag = 1; 244 break; 245 case 'd': 246 dflag = 1; 247 break; 248 case 'l': 249 lflag = 1; 250 dflag = 1; 251 break; 252 case 'V': 253 display_version(); 254 /* NOTREACHED */ 255 case '1': case '2': case '3': 256 case '4': case '5': case '6': 257 case '7': case '8': case '9': 258 numflag = ch - '0'; 259 break; 260 #ifndef SMALL 261 case 'f': 262 fflag = 1; 263 break; 264 case 'n': 265 nflag = 1; 266 Nflag = 0; 267 break; 268 case 'N': 269 nflag = 0; 270 Nflag = 1; 271 break; 272 case 'q': 273 qflag = 1; 274 break; 275 case 'r': 276 rflag = 1; 277 break; 278 case 'S': 279 Sflag = optarg; 280 break; 281 case 't': 282 cflag = 1; 283 tflag = 1; 284 dflag = 1; 285 break; 286 case 'v': 287 vflag = 1; 288 break; 289 #endif 290 default: 291 usage(); 292 /* NOTREACHED */ 293 } 294 argv += optind; 295 argc -= optind; 296 297 if (argc == 0) { 298 if (dflag) /* stdin mode */ 299 handle_stdin(); 300 else /* stdout mode */ 301 handle_stdout(); 302 } else { 303 do { 304 handle_pathname(argv[0]); 305 } while (*++argv); 306 } 307 #ifndef SMALL 308 if (qflag == 0 && lflag && argc > 1) 309 print_list(-1, 0, "(totals)", 0); 310 #endif 311 exit(exit_value); 312 } 313 314 /* maybe print a warning */ 315 void 316 maybe_warn(const char *fmt, ...) 317 { 318 va_list ap; 319 320 if (qflag == 0) { 321 va_start(ap, fmt); 322 vwarn(fmt, ap); 323 va_end(ap); 324 } 325 if (exit_value == 0) 326 exit_value = 1; 327 } 328 329 /* ... without an errno. */ 330 void 331 maybe_warnx(const char *fmt, ...) 332 { 333 va_list ap; 334 335 if (qflag == 0) { 336 va_start(ap, fmt); 337 vwarnx(fmt, ap); 338 va_end(ap); 339 } 340 if (exit_value == 0) 341 exit_value = 1; 342 } 343 344 /* maybe print an error */ 345 void 346 maybe_err(const char *fmt, ...) 347 { 348 va_list ap; 349 350 if (qflag == 0) { 351 va_start(ap, fmt); 352 vwarn(fmt, ap); 353 va_end(ap); 354 } 355 exit(2); 356 } 357 358 /* ... without an errno. */ 359 void 360 maybe_errx(const char *fmt, ...) 361 { 362 va_list ap; 363 364 if (qflag == 0) { 365 va_start(ap, fmt); 366 vwarnx(fmt, ap); 367 va_end(ap); 368 } 369 exit(2); 370 } 371 372 #ifndef SMALL 373 /* split up $GZIP and prepend it to the argument list */ 374 static void 375 prepend_gzip(char *gzip, int *argc, char ***argv) 376 { 377 char *s, **nargv, **ac; 378 int nenvarg = 0, i; 379 380 /* scan how many arguments there are */ 381 for (s = gzip; *s; s++) { 382 if (*s == ' ' || *s == '\t') 383 continue; 384 nenvarg++; 385 for (; *s; s++) 386 if (*s == ' ' || *s == '\t') 387 break; 388 if (*s == 0x0) 389 break; 390 } 391 /* punt early */ 392 if (nenvarg == 0) 393 return; 394 395 *argc += nenvarg; 396 ac = *argv; 397 398 nargv = (char **)malloc((*argc + 1) * sizeof(char *)); 399 if (nargv == NULL) 400 maybe_err("malloc"); 401 402 /* stash this away */ 403 *argv = nargv; 404 405 /* copy the program name first */ 406 i = 0; 407 nargv[i++] = *(ac++); 408 409 /* take a copy of $GZIP and add it to the array */ 410 s = strdup(gzip); 411 if (s == NULL) 412 maybe_err("strdup"); 413 for (; *s; s++) { 414 if (*s == ' ' || *s == '\t') 415 continue; 416 nargv[i++] = s; 417 for (; *s; s++) 418 if (*s == ' ' || *s == '\t') { 419 *s = 0; 420 break; 421 } 422 } 423 424 /* copy the original arguments and a NULL */ 425 while (*ac) 426 nargv[i++] = *(ac++); 427 nargv[i] = NULL; 428 } 429 #endif 430 431 /* compress input to output then close both files */ 432 static off_t 433 gz_compress(FILE *in, int out, off_t *gsizep, const char *origname, time_t mtime) 434 { 435 z_stream z; 436 char inbuf[BUFLEN], outbuf[BUFLEN]; 437 off_t in_tot = 0, out_tot = 0; 438 ssize_t in_size; 439 char *str; 440 int i, error; 441 uLong crc; 442 443 i = asprintf(&str, "%c%c%c%c%c%c%c%c%c%c%s", 444 GZIP_MAGIC0, GZIP_MAGIC1, 445 Z_DEFLATED, origname ? ORIG_NAME : 0, 446 (int)mtime & 0xff, 447 (int)(mtime >> 8) & 0xff, 448 (int)(mtime >> 16) & 0xff, 449 (int)(mtime >> 24) & 0xff, 450 0, OS_CODE, origname ? origname : ""); 451 if (i == -1) 452 maybe_err("asprintf"); 453 if (origname) 454 i++; 455 if (write(out, str, i) != i) { 456 maybe_warn("write"); 457 in_tot = -1; 458 goto out; 459 } 460 free(str); 461 462 memset(&z, 0, sizeof z); 463 z.next_out = outbuf; 464 z.avail_out = sizeof outbuf; 465 z.zalloc = Z_NULL; 466 z.zfree = Z_NULL; 467 z.opaque = 0; 468 469 error = deflateInit2(&z, numflag, Z_DEFLATED, 470 -MAX_WBITS, 8, Z_DEFAULT_STRATEGY); 471 if (error != Z_OK) { 472 maybe_warnx("deflateInit2 failed"); 473 in_tot = -1; 474 goto out; 475 } 476 477 crc = crc32(0L, Z_NULL, 0); 478 for (;;) { 479 if (z.avail_out == 0) { 480 if (write(out, outbuf, sizeof outbuf) != sizeof outbuf) { 481 maybe_warn("write"); 482 in_tot = -1; 483 goto out; 484 } 485 486 out_tot += sizeof outbuf; 487 z.next_out = outbuf; 488 z.avail_out = sizeof outbuf; 489 } 490 491 if (z.avail_in == 0) { 492 in_size = fread(inbuf, 1, sizeof inbuf, in); 493 if (ferror(in)) { 494 maybe_warn("fread"); 495 in_tot = -1; 496 goto out; 497 } 498 if (in_size == 0) 499 break; 500 501 crc = crc32(crc, (const Bytef *)inbuf, (unsigned)in_size); 502 in_tot += in_size; 503 z.next_in = inbuf; 504 z.avail_in = in_size; 505 } 506 507 error = deflate(&z, Z_NO_FLUSH); 508 if (error != Z_OK && error != Z_STREAM_END) { 509 maybe_warnx("deflate failed"); 510 in_tot = -1; 511 goto out; 512 } 513 } 514 515 /* clean up */ 516 for (;;) { 517 size_t len; 518 519 error = deflate(&z, Z_FINISH); 520 if (error != Z_OK && error != Z_STREAM_END) { 521 maybe_warnx("deflate failed"); 522 in_tot = -1; 523 goto out; 524 } 525 526 len = sizeof outbuf - z.avail_out; 527 528 if (write(out, outbuf, len) != len) { 529 maybe_warn("write"); 530 out_tot = -1; 531 goto out; 532 } 533 out_tot += len; 534 z.next_out = outbuf; 535 z.avail_out = sizeof outbuf; 536 537 if (error == Z_STREAM_END) 538 break; 539 } 540 541 if (deflateEnd(&z) != Z_OK) { 542 maybe_warnx("deflateEnd failed"); 543 in_tot = -1; 544 goto out; 545 } 546 547 i = asprintf(&str, "%c%c%c%c%c%c%c%c", 548 (int)crc & 0xff, 549 (int)(crc >> 8) & 0xff, 550 (int)(crc >> 16) & 0xff, 551 (int)(crc >> 24) & 0xff, 552 (int)in_tot & 0xff, 553 (int)(in_tot >> 8) & 0xff, 554 (int)(in_tot >> 16) & 0xff, 555 (int)(in_tot >> 24) & 0xff); 556 if (i != 8) 557 maybe_err("asprintf"); 558 if (write(out, str, i) != i) { 559 maybe_warn("write"); 560 in_tot = -1; 561 } 562 free(str); 563 564 out: 565 if (gsizep) 566 *gsizep = out_tot; 567 return in_tot; 568 } 569 570 /* 571 * uncompress input to output then close the input. return the 572 * uncompressed size written, and put the compressed sized read 573 * into `*gsizep'. 574 */ 575 static off_t 576 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep, 577 const char *filename) 578 { 579 z_stream z; 580 char outbuf[BUFLEN], inbuf[BUFLEN]; 581 off_t out_tot, out_sub_tot, in_tot; 582 enum { 583 GZSTATE_MAGIC0, 584 GZSTATE_MAGIC1, 585 GZSTATE_METHOD, 586 GZSTATE_FLAGS, 587 GZSTATE_SKIPPING, 588 GZSTATE_EXTRA, 589 GZSTATE_EXTRA2, 590 GZSTATE_EXTRA3, 591 GZSTATE_ORIGNAME, 592 GZSTATE_COMMENT, 593 GZSTATE_HEAD_CRC1, 594 GZSTATE_HEAD_CRC2, 595 GZSTATE_INIT, 596 GZSTATE_READ, 597 GZSTATE_CRC, 598 GZSTATE_LEN, 599 } state = GZSTATE_MAGIC0; 600 int flags = 0, skip_count = 0; 601 int error, done_reading = 0; 602 uLong crc; 603 604 #define ADVANCE() { z.next_in++; z.avail_in--; } 605 606 memset(&z, 0, sizeof z); 607 z.avail_in = prelen; 608 z.next_in = pre; 609 z.avail_out = sizeof outbuf; 610 z.next_out = outbuf; 611 z.zalloc = NULL; 612 z.zfree = NULL; 613 z.opaque = 0; 614 615 in_tot = prelen; 616 out_tot = 0; 617 618 for (;;) { 619 if (z.avail_in == 0 && done_reading == 0) { 620 size_t in_size = read(in, inbuf, BUFLEN); 621 622 if (in_size == -1) { 623 #ifndef SMALL 624 if (tflag && vflag) 625 print_test(filename, 0); 626 #endif 627 maybe_warn("failed to read stdin"); 628 out_tot = -1; 629 goto stop; 630 } else if (in_size == 0) 631 done_reading = 1; 632 633 z.avail_in = in_size; 634 z.next_in = inbuf; 635 636 in_tot += in_size; 637 } 638 if (z.avail_in == 0) { 639 if (done_reading && state != GZSTATE_MAGIC0) 640 maybe_warnx("%s: unexpected end of file", 641 filename); 642 goto stop; 643 } 644 switch (state) { 645 case GZSTATE_MAGIC0: 646 if (*z.next_in != GZIP_MAGIC0) { 647 maybe_warnx("input not gziped (MAGIC0)"); 648 out_tot = -1; 649 goto stop; 650 } 651 ADVANCE(); 652 state++; 653 out_sub_tot = 0; 654 crc = crc32(0L, Z_NULL, 0); 655 break; 656 657 case GZSTATE_MAGIC1: 658 if (*z.next_in != GZIP_MAGIC1 && 659 *z.next_in != GZIP_OMAGIC1) { 660 maybe_warnx("input not gziped (MAGIC1)"); 661 out_tot = -1; 662 goto stop; 663 } 664 ADVANCE(); 665 state++; 666 break; 667 668 case GZSTATE_METHOD: 669 if (*z.next_in != Z_DEFLATED) { 670 maybe_warnx("unknown compression method"); 671 out_tot = -1; 672 goto stop; 673 } 674 ADVANCE(); 675 state++; 676 break; 677 678 case GZSTATE_FLAGS: 679 flags = *z.next_in; 680 ADVANCE(); 681 skip_count = 6; 682 state++; 683 break; 684 685 case GZSTATE_SKIPPING: 686 if (skip_count > 0) { 687 skip_count--; 688 ADVANCE(); 689 } else 690 state++; 691 break; 692 693 case GZSTATE_EXTRA: 694 if ((flags & EXTRA_FIELD) == 0) { 695 state = GZSTATE_ORIGNAME; 696 break; 697 } 698 skip_count = *z.next_in; 699 ADVANCE(); 700 state++; 701 break; 702 703 case GZSTATE_EXTRA2: 704 skip_count |= ((*z.next_in) << 8); 705 ADVANCE(); 706 state++; 707 break; 708 709 case GZSTATE_EXTRA3: 710 if (skip_count > 0) { 711 skip_count--; 712 ADVANCE(); 713 } else 714 state++; 715 break; 716 717 case GZSTATE_ORIGNAME: 718 if ((flags & ORIG_NAME) == 0) { 719 state++; 720 break; 721 } 722 if (*z.next_in == 0) 723 state++; 724 ADVANCE(); 725 break; 726 727 case GZSTATE_COMMENT: 728 if ((flags & COMMENT) == 0) { 729 state++; 730 break; 731 } 732 if (*z.next_in == 0) 733 state++; 734 ADVANCE(); 735 break; 736 737 case GZSTATE_HEAD_CRC1: 738 if (flags & HEAD_CRC) 739 skip_count = 2; 740 else 741 skip_count = 0; 742 state++; 743 break; 744 745 case GZSTATE_HEAD_CRC2: 746 if (skip_count > 0) { 747 skip_count--; 748 ADVANCE(); 749 } else 750 state++; 751 break; 752 753 case GZSTATE_INIT: 754 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) { 755 maybe_warnx("failed to inflateInit"); 756 out_tot = -1; 757 goto stop; 758 } 759 state++; 760 break; 761 762 case GZSTATE_READ: 763 error = inflate(&z, Z_FINISH); 764 /* Z_BUF_ERROR goes with Z_FINISH... */ 765 if (error == Z_STREAM_END || error == Z_BUF_ERROR) { 766 size_t wr = BUFLEN - z.avail_out; 767 768 /* Nothing left? */ 769 if (wr == 0) 770 goto stop; 771 772 crc = crc32(crc, outbuf, wr); 773 774 if ( 775 #ifndef SMALL 776 /* don't write anything with -t */ 777 tflag == 0 && 778 #endif 779 write(out, outbuf, wr) != wr) { 780 maybe_warn("error writing to output"); 781 out_tot = -1; 782 goto stop; 783 } 784 785 out_tot += wr; 786 out_sub_tot += wr; 787 788 if (error == Z_STREAM_END) { 789 inflateEnd(&z); 790 state++; 791 } 792 793 z.next_out = outbuf; 794 z.avail_out = BUFLEN; 795 796 break; 797 } 798 case GZSTATE_CRC: 799 { 800 static int empty_buffer = 0; 801 uLong origcrc; 802 803 if (z.avail_in < 4) { 804 if (!done_reading && empty_buffer++ < 4) 805 continue; 806 maybe_warnx("truncated input"); 807 goto stop; 808 } 809 empty_buffer = 0; 810 origcrc = z.next_in[0] | 811 z.next_in[1] << 8 | 812 z.next_in[2] << 16 | 813 z.next_in[3] << 24; 814 if (origcrc != crc) 815 maybe_warnx("invalid compressed" 816 " data--crc error"); 817 } 818 819 z.avail_in -= 4; 820 z.next_in += 4; 821 822 if (!z.avail_in) 823 goto stop; 824 state++; 825 break; 826 case GZSTATE_LEN: 827 { 828 static int empty_buffer = 0; 829 uLong origlen; 830 831 if (z.avail_in < 4) { 832 if (!done_reading && empty_buffer++ < 4) 833 continue; 834 maybe_warnx("truncated input"); 835 goto stop; 836 } 837 empty_buffer = 0; 838 origlen = z.next_in[0] | 839 z.next_in[1] << 8 | 840 z.next_in[2] << 16 | 841 z.next_in[3] << 24; 842 843 if (origlen != out_sub_tot) 844 maybe_warnx("invalid compressed" 845 " data--length error"); 846 } 847 848 z.avail_in -= 4; 849 z.next_in += 4; 850 851 if (error < 0) { 852 maybe_warnx("decompression error"); 853 out_tot = -1; 854 goto stop; 855 } 856 state = GZSTATE_MAGIC0; 857 break; 858 } 859 continue; 860 stop: 861 break; 862 } 863 if (state > GZSTATE_INIT) 864 inflateEnd(&z); 865 866 #ifndef SMALL 867 if (tflag && vflag) 868 print_test(filename, out_tot != -1); 869 #endif 870 871 if (gsizep) 872 *gsizep = in_tot; 873 return (out_tot); 874 } 875 876 #ifndef SMALL 877 /* 878 * set the owner, mode, flags & utimes for a file 879 */ 880 static void 881 copymodes(const char *file, struct stat *sbp) 882 { 883 struct timeval times[2]; 884 885 /* 886 * If we have no info on the input, give this file some 887 * default values and return.. 888 */ 889 if (sbp == NULL) { 890 mode_t mask = umask(022); 891 892 (void)chmod(file, DEFFILEMODE & ~mask); 893 (void)umask(mask); 894 return; 895 } 896 897 /* if the chown fails, remove set-id bits as-per compress(1) */ 898 if (chown(file, sbp->st_uid, sbp->st_gid) < 0) { 899 if (errno != EPERM) 900 maybe_warn("couldn't chown: %s", file); 901 sbp->st_mode &= ~(S_ISUID|S_ISGID); 902 } 903 904 /* we only allow set-id and the 9 normal permission bits */ 905 sbp->st_mode &= S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO; 906 if (chmod(file, sbp->st_mode) < 0) 907 maybe_warn("couldn't chmod: %s", file); 908 909 /* only try flags if they exist already */ 910 if (sbp->st_flags != 0 && chflags(file, sbp->st_flags) < 0) 911 maybe_warn("couldn't chflags: %s", file); 912 913 TIMESPEC_TO_TIMEVAL(×[0], &sbp->st_atimespec); 914 TIMESPEC_TO_TIMEVAL(×[1], &sbp->st_mtimespec); 915 if (utimes(file, times) < 0) 916 maybe_warn("couldn't utimes: %s", file); 917 } 918 #endif 919 920 /* what sort of file is this? */ 921 static enum filetype 922 file_gettype(u_char *buf) 923 { 924 925 if (buf[0] == GZIP_MAGIC0 && 926 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 927 return FT_GZIP; 928 else 929 #ifndef NO_BZIP2_SUPPORT 930 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 931 buf[3] >= '0' && buf[3] <= '9') 932 return FT_BZIP2; 933 else 934 #endif 935 #ifndef NO_COMPRESS_SUPPORT 936 if (memcmp(buf, Z_MAGIC, 2) == 0) 937 return FT_Z; 938 else 939 #endif 940 return FT_UNKNOWN; 941 } 942 943 #ifndef SMALL 944 /* check the outfile is OK. */ 945 static int 946 check_outfile(const char *outfile, struct stat *sb) 947 { 948 int ok = 1; 949 950 if (fflag == 0 && lflag == 0 && stat(outfile, sb) == 0) { 951 if (isatty(STDIN_FILENO)) { 952 char ans[10] = { 'n', '\0' }; /* default */ 953 954 fprintf(stderr, "%s already exists -- do you wish to " 955 "overwrite (y or n)? " , outfile); 956 (void)fgets(ans, sizeof(ans) - 1, stdin); 957 if (ans[0] != 'y' && ans[0] != 'Y') { 958 fprintf(stderr, "\tnot overwritting\n"); 959 ok = 0; 960 } else 961 unlink(outfile); 962 } else { 963 maybe_warnx("%s already exists -- skipping", outfile); 964 ok = 0; 965 } 966 } 967 return ok; 968 } 969 #endif 970 971 /* 972 * compress the given file: create a corresponding .gz file and remove the 973 * original. 974 */ 975 static off_t 976 file_compress(char *file, char *outfile, size_t outsize) 977 { 978 FILE *in; 979 int out; 980 struct stat isb, osb; 981 off_t size; 982 #ifndef SMALL 983 u_int32_t mtime = 0; 984 char *savename; 985 #endif 986 987 if (cflag == 0) { 988 (void)strncpy(outfile, file, outsize - suffix_len); 989 outfile[outsize - suffix_len] = '\0'; 990 (void)strlcat(outfile, suffix, outsize); 991 992 #ifndef SMALL 993 if (check_outfile(outfile, &osb) == 0) 994 goto lose; 995 996 if (stat(file, &isb) == 0) { 997 if (isb.st_nlink > 1 && fflag == 0) { 998 maybe_warnx("%s has %d other link%s -- " 999 "skipping", file, isb.st_nlink - 1, 1000 isb.st_nlink == 1 ? "" : "s"); 1001 goto lose; 1002 } 1003 if (nflag == 0) 1004 mtime = (u_int32_t)isb.st_mtime; 1005 } 1006 #endif 1007 } 1008 in = fopen(file, "r"); 1009 if (in == NULL) { 1010 maybe_warn("can't fopen %s", file); 1011 goto lose; 1012 } 1013 1014 #ifndef SMALL 1015 if (nflag == 0) 1016 savename = basename(file); 1017 else 1018 savename = NULL; 1019 #endif 1020 if (cflag == 0) { 1021 out = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1022 if (out == -1) { 1023 maybe_warn("could not create output: %s", outfile); 1024 goto lose; 1025 } 1026 } else 1027 out = STDOUT_FILENO; 1028 1029 #ifdef SMALL 1030 gz_compress(in, out, NULL, NULL, 0); 1031 #else 1032 gz_compress(in, out, NULL, savename, mtime); 1033 #endif 1034 1035 (void)fclose(in); 1036 1037 /* 1038 * if we compressed to stdout, we don't know the size and 1039 * we don't know the new file name, punt. if we can't stat 1040 * the file, whine, otherwise set the size from the stat 1041 * buffer. we only blow away the file if we can stat the 1042 * output, just in case. 1043 */ 1044 if (cflag == 0) { 1045 if (close(out) == -1) 1046 maybe_warn("couldn't close ouput"); 1047 1048 if (stat(outfile, &osb) < 0) { 1049 maybe_warn("couldn't stat: %s", outfile); 1050 maybe_warnx("leaving original %s", file); 1051 size = 0; 1052 } else { 1053 unlink(file); 1054 size = osb.st_size; 1055 } 1056 #ifndef SMALL 1057 copymodes(outfile, &isb); 1058 #endif 1059 } else { 1060 lose: 1061 size = -1; 1062 } 1063 1064 return (size); 1065 } 1066 1067 /* uncompress the given file and remove the original */ 1068 static off_t 1069 file_uncompress(char *file, char *outfile, size_t outsize) 1070 { 1071 struct stat isb, osb; 1072 char *s; 1073 off_t size; 1074 ssize_t len = strlen(file); 1075 unsigned char header1[4], name[PATH_MAX + 1]; 1076 enum filetype method; 1077 int fd, zfd; 1078 #ifndef SMALL 1079 time_t timestamp = 0; 1080 #endif 1081 1082 /* gather the old name info */ 1083 1084 fd = open(file, O_RDONLY); 1085 if (fd < 0) { 1086 maybe_warn("can't open %s", file); 1087 goto lose; 1088 } 1089 if (read(fd, header1, sizeof header1) != sizeof header1) { 1090 /* we don't want to fail here. */ 1091 #ifndef SMALL 1092 if (fflag) 1093 goto lose_close_it; 1094 #endif 1095 maybe_warn("can't read %s", file); 1096 goto lose; 1097 } 1098 1099 method = file_gettype(header1); 1100 1101 #ifndef SMALL 1102 if (Sflag == NULL) { 1103 # ifndef NO_BZIP2_SUPPORT 1104 if (method == FT_BZIP2) 1105 suffix = BZ2_SUFFIX; 1106 else 1107 # endif 1108 # ifndef NO_COMPRESS_SUPPORT 1109 if (method == FT_Z) 1110 suffix = Z_SUFFIX; 1111 # endif 1112 } 1113 1114 if (fflag == 0 && method == FT_UNKNOWN) { 1115 maybe_warnx("%s: not in gzip format", file); 1116 goto lose_close_it; 1117 } 1118 #endif 1119 1120 if (cflag == 0 || lflag) { 1121 s = &file[len - suffix_len + 1]; 1122 if (strncmp(s, suffix, suffix_len) == 0) { 1123 (void)strncpy(outfile, file, len - suffix_len + 1); 1124 outfile[len - suffix_len + 1] = '\0'; 1125 } else if (lflag == 0) { 1126 maybe_warnx("unknown suffix %s", s); 1127 goto lose_close_it; 1128 } 1129 } 1130 1131 #ifdef SMALL 1132 if (method == FT_GZIP && lflag) 1133 #else 1134 if (method == FT_GZIP && (Nflag || lflag)) 1135 #endif 1136 { 1137 #ifndef SMALL 1138 unsigned char header2[4]; /* timestamp */ 1139 1140 if (lseek(fd, GZIP_TIMESTAMP, SEEK_SET) == -1) { 1141 maybe_warn("can't lseek %s", file); 1142 goto close_header_read; 1143 } 1144 if (read(fd, header2, sizeof header2) != sizeof header2) { 1145 if (fflag) 1146 goto lose_close_it; 1147 maybe_warn("can't read %s", file); 1148 goto lose; 1149 } 1150 timestamp = ((time_t)header2[3] << 24) 1151 + ((time_t)header2[2] << 16) 1152 + ((time_t)header2[1] << 8) 1153 + (time_t)header2[0]; 1154 #endif 1155 1156 if (header1[3] & ORIG_NAME) { 1157 size_t rbytes; 1158 int i; 1159 1160 if (lseek(fd, GZIP_ORIGNAME, SEEK_SET) == -1) { 1161 maybe_warn("can't lseek %s", file); 1162 goto close_header_read; 1163 } 1164 rbytes = read(fd, name, PATH_MAX + 1); 1165 if (rbytes < 0) { 1166 maybe_warn("can't read %s", file); 1167 goto lose_close_it; 1168 } 1169 for (i = 0; i < rbytes && name[i]; i++) 1170 ; 1171 if (i < rbytes) { 1172 name[i] = 0; 1173 /* now maybe merge old dirname */ 1174 if (strchr(outfile, '/') == NULL) 1175 (void) strlcpy(outfile, name, outsize); 1176 else { 1177 char newbuf[PATH_MAX + 1]; 1178 1179 (void) snprintf(newbuf, sizeof(newbuf), 1180 "%s/%s", dirname(outfile), 1181 name); 1182 (void) strlcpy(outfile, newbuf, 1183 outsize); 1184 } 1185 } 1186 } 1187 } 1188 close_header_read: 1189 close(fd); 1190 1191 if (cflag == 0 || lflag) { 1192 #ifndef SMALL 1193 if (check_outfile(outfile, &osb) == 0) 1194 goto lose; 1195 1196 #endif 1197 if (stat(file, &isb) == 0) { 1198 #ifndef SMALL 1199 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1200 maybe_warnx("%s has %d other links -- skipping", 1201 file, isb.st_nlink - 1); 1202 goto lose; 1203 } 1204 if (nflag == 0 && timestamp) 1205 isb.st_mtime = timestamp; 1206 #endif 1207 } else 1208 goto lose; 1209 } 1210 1211 if (cflag == 0 && lflag == 0) { 1212 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1213 if (zfd == -1) { 1214 maybe_warn("can't open %s", outfile); 1215 goto lose; 1216 } 1217 } else 1218 zfd = STDOUT_FILENO; 1219 1220 #ifndef NO_BZIP2_SUPPORT 1221 if (method == FT_BZIP2) { 1222 int in; 1223 1224 /* XXX */ 1225 if (lflag) { 1226 maybe_warnx("no -l with bzip2 files"); 1227 goto lose; 1228 } 1229 1230 if ((in = open(file, O_RDONLY)) == -1) { 1231 maybe_warn("open for read: %s", file); 1232 goto lose; 1233 } 1234 1235 size = unbzip2(in, zfd, NULL, 0, NULL); 1236 if (size == -1) { 1237 if (cflag == 0) 1238 unlink(outfile); 1239 maybe_warnx("%s: uncompress failed", file); 1240 goto lose; 1241 } 1242 if (close(in) != 0) 1243 maybe_warn("couldn't close input"); 1244 if (cflag == 0 && close(zfd) != 0) 1245 maybe_warn("couldn't close output"); 1246 } else 1247 #endif 1248 1249 #ifndef NO_COMPRESS_SUPPORT 1250 if (method == FT_Z) { 1251 FILE *in, *out; 1252 1253 /* XXX */ 1254 if (lflag) { 1255 maybe_warnx("no -l with Lempel-Ziv files"); 1256 goto lose; 1257 } 1258 1259 if ((in = zopen(file, NULL)) == NULL) { 1260 maybe_warn("open for read: %s", file); 1261 goto lose; 1262 } 1263 1264 out = fdopen(zfd, "w"); 1265 if (out == NULL) { 1266 maybe_warn("open for write: %s", outfile); 1267 goto lose; 1268 } 1269 1270 size = zuncompress(in, out, NULL, 0, NULL); 1271 if (ferror(in) || fclose(in) != 0) { 1272 unlink(outfile); 1273 (void)fclose(out); 1274 maybe_warn("failed infile fclose"); 1275 } 1276 if (cflag == 0) { 1277 if (size == -1) { 1278 maybe_warnx("%s: uncompress failed", file); 1279 (void)fclose(out); 1280 unlink(outfile); 1281 goto lose; 1282 } 1283 if (fclose(out) != 0) { 1284 unlink(outfile); 1285 maybe_warn("failed outfile close"); 1286 goto lose; 1287 } 1288 } 1289 } else 1290 #endif 1291 1292 #ifndef SMALL 1293 if (method == FT_UNKNOWN) { 1294 int in; 1295 1296 in = open(file, O_RDONLY); 1297 if (in == -1) { 1298 maybe_warn("can't open %s", file); 1299 goto lose; 1300 } 1301 size = cat_fd(NULL, 0, NULL, in); 1302 } else 1303 #endif 1304 { 1305 int in; 1306 1307 if (lflag) { 1308 if ((zfd = open(file, O_RDONLY)) == -1) { 1309 maybe_warn("open: %s", file); 1310 goto lose; 1311 } 1312 print_list(zfd, isb.st_size, outfile, isb.st_mtime); 1313 return 0; /* XXX */ 1314 } 1315 1316 in = open(file, O_RDONLY); 1317 if (in == -1) { 1318 maybe_warn("can't open %s", file); 1319 goto lose; 1320 } 1321 1322 size = gz_uncompress(in, zfd, NULL, 0, NULL, file); 1323 (void)close(in); 1324 if (cflag == 0) { 1325 if (close(zfd)) 1326 maybe_warn("failed close"); 1327 if (size == -1) { 1328 maybe_warnx("%s: uncompress failed", file); 1329 unlink(outfile); 1330 goto lose; 1331 } 1332 } 1333 } 1334 1335 /* if testing, or we uncompressed to stdout, this is all we need */ 1336 #ifndef SMALL 1337 if (tflag) 1338 return (size); 1339 #endif 1340 if (cflag) 1341 return (size); 1342 1343 /* 1344 * if we create a file... 1345 */ 1346 if (cflag == 0) { 1347 /* 1348 * if we can't stat the file, or we are uncompressing to 1349 * stdin, don't remove the file. 1350 */ 1351 if (stat(outfile, &osb) < 0) { 1352 maybe_warn("couldn't stat (leaving original): %s", 1353 outfile); 1354 goto lose; 1355 } 1356 if (osb.st_size != size) { 1357 maybe_warn("stat gave different size: %llu != %llu " 1358 "(leaving original)", 1359 (unsigned long long)size, 1360 (unsigned long long)osb.st_size); 1361 goto lose; 1362 } 1363 if (cflag == 0) 1364 unlink(file); 1365 size = osb.st_size; 1366 #ifndef SMALL 1367 copymodes(outfile, &isb); 1368 #endif 1369 } 1370 return (size); 1371 1372 lose_close_it: 1373 close(fd); 1374 lose: 1375 return -1; 1376 } 1377 1378 #ifndef SMALL 1379 static off_t 1380 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd) 1381 { 1382 char buf[BUFLEN]; 1383 size_t rv; 1384 off_t in_tot; 1385 1386 in_tot = count; 1387 if (write(STDOUT_FILENO, prepend, count) != count) { 1388 maybe_warn("write to stdout"); 1389 return -1; 1390 } 1391 for (;;) { 1392 rv = read(fd, buf, sizeof buf); 1393 if (rv == 0) 1394 break; 1395 if (rv < 0) { 1396 maybe_warn("read from fd %d", fd); 1397 break; 1398 } 1399 1400 if (write(STDOUT_FILENO, buf, rv) != rv) { 1401 maybe_warn("write to stdout"); 1402 break; 1403 } 1404 in_tot += rv; 1405 } 1406 1407 if (gsizep) 1408 *gsizep = in_tot; 1409 return (in_tot); 1410 } 1411 #endif 1412 1413 static void 1414 handle_stdin(void) 1415 { 1416 unsigned char header1[4]; 1417 off_t usize, gsize; 1418 enum filetype method; 1419 #ifndef NO_COMPRESS_SUPPORT 1420 FILE *in; 1421 #endif 1422 1423 #ifndef SMALL 1424 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1425 maybe_warnx("standard input is a terminal -- ignoring"); 1426 return; 1427 } 1428 #endif 1429 1430 if (lflag) { 1431 struct stat isb; 1432 1433 /* XXX could read the whole file, etc. */ 1434 if (fstat(STDIN_FILENO, &isb) < 0) { 1435 maybe_warn("fstat"); 1436 return; 1437 } 1438 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime); 1439 return; 1440 } 1441 1442 if (read(STDIN_FILENO, header1, sizeof header1) != sizeof header1) { 1443 maybe_warn("can't read stdin"); 1444 return; 1445 } 1446 1447 method = file_gettype(header1); 1448 switch (method) { 1449 default: 1450 #ifndef SMALL 1451 if (fflag == 0) { 1452 maybe_warnx("unknown compression format"); 1453 return; 1454 } 1455 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO); 1456 break; 1457 #endif 1458 case FT_GZIP: 1459 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1460 header1, sizeof header1, &gsize, "(stdin)"); 1461 break; 1462 #ifndef NO_BZIP2_SUPPORT 1463 case FT_BZIP2: 1464 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1465 header1, sizeof header1, &gsize); 1466 break; 1467 #endif 1468 #ifndef NO_COMPRESS_SUPPORT 1469 case FT_Z: 1470 if ((in = zopen(NULL, stdin)) == NULL) { 1471 maybe_warnx("zopen of stdin"); 1472 return; 1473 } 1474 1475 usize = zuncompress(in, stdout, header1, sizeof header1, &gsize); 1476 break; 1477 #endif 1478 } 1479 1480 #ifndef SMALL 1481 if (vflag && !tflag && usize != -1 && gsize != -1) 1482 print_verbage(NULL, 0, usize, gsize); 1483 #endif 1484 1485 } 1486 1487 static void 1488 handle_stdout(void) 1489 { 1490 off_t gsize, usize; 1491 1492 #ifndef SMALL 1493 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1494 maybe_warnx("standard output is a terminal -- ignoring"); 1495 return; 1496 } 1497 #endif 1498 usize = gz_compress(stdin, STDOUT_FILENO, &gsize, NULL, 0); 1499 1500 #ifndef SMALL 1501 if (vflag && !tflag && usize != -1 && gsize != -1) 1502 print_verbage(NULL, 0, usize, gsize); 1503 #endif 1504 } 1505 1506 /* do what is asked for, for the path name */ 1507 static void 1508 handle_pathname(char *path) 1509 { 1510 char *opath = path, *s = NULL; 1511 ssize_t len; 1512 struct stat sb; 1513 1514 /* check for stdout/stdin */ 1515 if (path[0] == '-' && path[1] == '\0') { 1516 if (dflag) 1517 handle_stdin(); 1518 else 1519 handle_stdout(); 1520 return; 1521 } 1522 1523 retry: 1524 if (stat(path, &sb) < 0) { 1525 /* lets try <path>.gz if we're decompressing */ 1526 if (dflag && s == NULL && errno == ENOENT) { 1527 len = strlen(path); 1528 s = malloc(len + suffix_len + 1); 1529 if (s == NULL) 1530 maybe_err("malloc"); 1531 memmove(s, path, len); 1532 memmove(&s[len], suffix, suffix_len); 1533 s[len + suffix_len] = 0x0; 1534 path = s; 1535 goto retry; 1536 } 1537 maybe_warn("can't stat: %s", opath); 1538 goto out; 1539 } 1540 1541 if (S_ISDIR(sb.st_mode)) { 1542 #ifndef SMALL 1543 if (rflag) 1544 handle_dir(path, &sb); 1545 else 1546 #endif 1547 maybe_warn("%s is a directory", path); 1548 goto out; 1549 } 1550 1551 if (S_ISREG(sb.st_mode)) 1552 handle_file(path, &sb); 1553 1554 out: 1555 if (s) 1556 free(s); 1557 } 1558 1559 /* compress/decompress a file */ 1560 static void 1561 handle_file(char *file, struct stat *sbp) 1562 { 1563 off_t usize, gsize; 1564 char outfile[PATH_MAX]; 1565 1566 infile = file; 1567 if (dflag) { 1568 usize = file_uncompress(file, outfile, sizeof(outfile)); 1569 if (usize == -1) 1570 return; 1571 gsize = sbp->st_size; 1572 } else { 1573 gsize = file_compress(file, outfile, sizeof(outfile)); 1574 if (gsize == -1) 1575 return; 1576 usize = sbp->st_size; 1577 } 1578 1579 1580 #ifndef SMALL 1581 if (vflag && !tflag) 1582 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 1583 #endif 1584 } 1585 1586 #ifndef SMALL 1587 /* this is used with -r to recursively decend directories */ 1588 static void 1589 handle_dir(char *dir, struct stat *sbp) 1590 { 1591 char *path_argv[2]; 1592 FTS *fts; 1593 FTSENT *entry; 1594 1595 path_argv[0] = dir; 1596 path_argv[1] = 0; 1597 fts = fts_open(path_argv, FTS_PHYSICAL, NULL); 1598 if (fts == NULL) { 1599 warn("couldn't fts_open %s", dir); 1600 return; 1601 } 1602 1603 while ((entry = fts_read(fts))) { 1604 switch(entry->fts_info) { 1605 case FTS_D: 1606 case FTS_DP: 1607 continue; 1608 1609 case FTS_DNR: 1610 case FTS_ERR: 1611 case FTS_NS: 1612 maybe_warn("%s", entry->fts_path); 1613 continue; 1614 case FTS_F: 1615 handle_file(entry->fts_name, entry->fts_statp); 1616 } 1617 } 1618 (void)fts_close(fts); 1619 } 1620 #endif 1621 1622 /* print a ratio */ 1623 static void 1624 print_ratio(off_t in, off_t out, FILE *where) 1625 { 1626 int64_t percent10; /* 10 * percent */ 1627 off_t diff = in - out; 1628 char ch; 1629 1630 if (in == 0) 1631 percent10 = 0; 1632 else if (diff > 0x400000) /* anything with 22 or more bits */ 1633 percent10 = diff / (in / 1000); 1634 else 1635 percent10 = (1000 * diff) / in; 1636 1637 if (percent10 < 0) { 1638 percent10 = -percent10; 1639 ch = '-'; 1640 } else 1641 ch = ' '; 1642 1643 /* 1644 * ugh. for negative percentages < 10, we need to avoid printing a 1645 * a space between the "-" and the single number. 1646 */ 1647 if (ch == '-' && percent10 / 10LL < 10) 1648 fprintf(where, " -%1d.%1u%%", (unsigned)(percent10 / 10LL), 1649 (unsigned)(percent10 % 10LL)); 1650 else 1651 fprintf(where, "%c%2d.%1u%%", ch, (unsigned)(percent10 / 10LL), 1652 (unsigned)(percent10 % 10LL)); 1653 } 1654 1655 #ifndef SMALL 1656 /* print compression statistics, and the new name (if there is one!) */ 1657 static void 1658 print_verbage(char *file, char *nfile, off_t usize, off_t gsize) 1659 { 1660 if (file) 1661 fprintf(stderr, "%s:%s ", file, 1662 strlen(file) < 7 ? "\t\t" : "\t"); 1663 print_ratio((off_t)usize, (off_t)gsize, stderr); 1664 if (nfile) 1665 fprintf(stderr, " -- replaced with %s", nfile); 1666 fprintf(stderr, "\n"); 1667 fflush(stderr); 1668 } 1669 1670 /* print test results */ 1671 static void 1672 print_test(const char *file, int ok) 1673 { 1674 1675 if (exit_value == 0 && ok == 0) 1676 exit_value = 1; 1677 fprintf(stderr, "%s:%s %s\n", file, 1678 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 1679 fflush(stderr); 1680 } 1681 #endif 1682 1683 /* print a file's info ala --list */ 1684 /* eg: 1685 compressed uncompressed ratio uncompressed_name 1686 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 1687 */ 1688 static void 1689 print_list(int fd, off_t out, const char *outfile, time_t ts) 1690 { 1691 static int first = 1; 1692 #ifndef SMALL 1693 static off_t in_tot, out_tot; 1694 u_int32_t crc; 1695 #endif 1696 off_t in; 1697 int rv; 1698 1699 if (first) { 1700 #ifndef SMALL 1701 if (vflag) 1702 printf("method crc date time "); 1703 #endif 1704 if (qflag == 0) 1705 printf(" compressed uncompressed " 1706 "ratio uncompressed_name\n"); 1707 } 1708 first = 0; 1709 1710 /* print totals? */ 1711 #ifndef SMALL 1712 if (fd == -1) { 1713 in = in_tot; 1714 out = out_tot; 1715 } else 1716 #endif 1717 { 1718 /* read the last 4 bytes - this is the uncompressed size */ 1719 rv = lseek(fd, (off_t)(-8), SEEK_END); 1720 if (rv != -1) { 1721 unsigned char buf[8]; 1722 u_int32_t usize; 1723 1724 if (read(fd, (char *)buf, sizeof(buf)) != sizeof(buf)) 1725 maybe_warn("read of uncompressed size"); 1726 usize = buf[4] | buf[5] << 8 | buf[6] << 16 | buf[7] << 24; 1727 in = (off_t)usize; 1728 #ifndef SMALL 1729 crc = buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24; 1730 #endif 1731 } 1732 } 1733 1734 #ifndef SMALL 1735 if (vflag && fd == -1) 1736 printf(" "); 1737 else if (vflag) { 1738 char *date = ctime(&ts); 1739 1740 /* skip the day, 1/100th second, and year */ 1741 date += 4; 1742 date[12] = 0; 1743 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 1744 } 1745 in_tot += in; 1746 out_tot += out; 1747 #endif 1748 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 1749 print_ratio(in, out, stdout); 1750 printf(" %s\n", outfile); 1751 } 1752 1753 /* display the usage of NetBSD gzip */ 1754 static void 1755 usage(void) 1756 { 1757 1758 fprintf(stderr, "%s\n", gzip_version); 1759 fprintf(stderr, 1760 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n" 1761 #ifndef SMALL 1762 " -c --stdout write to stdout, keep original files\n" 1763 " --to-stdout\n" 1764 " -d --decompress uncompress files\n" 1765 " --uncompress\n" 1766 " -f --force force overwriting & compress links\n" 1767 " -h --help display this help\n" 1768 " -n --no-name don't save original file name or time stamp\n" 1769 " -N --name save or restore original file name and time stamp\n" 1770 " -q --quiet output no warnings\n" 1771 " -r --recursive recursively compress files in directories\n" 1772 " -S .suf use suffix .suf instead of .gz\n" 1773 " --suffix .suf\n" 1774 " -t --test test compressed file\n" 1775 " -v --verbose print extra statistics\n" 1776 " -V --version display program version\n" 1777 " -1 --fast fastest (worst) compression\n" 1778 " -2 .. -8 set compression level\n" 1779 " -9 --best best (slowest) compression\n", 1780 #else 1781 , 1782 #endif 1783 getprogname()); 1784 exit(0); 1785 } 1786 1787 /* display the version of NetBSD gzip */ 1788 static void 1789 display_version(void) 1790 { 1791 1792 fprintf(stderr, "%s\n", gzip_version); 1793 exit(0); 1794 } 1795 1796 #ifndef NO_BZIP2_SUPPORT 1797 #include "unbzip2.c" 1798 #endif 1799 #ifndef NO_COMPRESS_SUPPORT 1800 #include "zuncompress.c" 1801 #endif 1802
Indexes created Sun Sep 21 20:09:37 GMT 2025