gzip.c revision 1.66
1 /* $NetBSD: gzip.c,v 1.66 2004/09/05 21:32:30 dsl 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 1.66 2004/09/05 21:32:30 dsl Exp $"); 36 #endif /* not lint */ 37 38 /* 39 * gzip.c -- GPL free gzip using zlib. 40 * 41 * RFC 1950 covers the zlib format 42 * RFC 1951 covers the deflate format 43 * RFC 1952 covers the gzip format 44 * 45 * TODO: 46 * - use mmap where possible 47 * - handle some signals better (remove outfile?) 48 * - make bzip2/compress -v/-t/-l support work as well as possible 49 */ 50 51 #include <sys/param.h> 52 #include <sys/stat.h> 53 #include <sys/time.h> 54 55 #include <inttypes.h> 56 #include <unistd.h> 57 #include <stdio.h> 58 #include <string.h> 59 #include <stdlib.h> 60 #include <err.h> 61 #include <errno.h> 62 #include <fcntl.h> 63 #include <zlib.h> 64 #include <fts.h> 65 #include <libgen.h> 66 #include <stdarg.h> 67 #include <getopt.h> 68 69 #ifndef PRIdOFF 70 #define PRIdOFF PRId64 71 #endif 72 73 /* what type of file are we dealing with */ 74 enum filetype { 75 FT_GZIP, 76 #ifndef NO_BZIP2_SUPPORT 77 FT_BZIP2, 78 #endif 79 #ifndef NO_COMPRESS_SUPPORT 80 FT_Z, 81 #endif 82 FT_LAST, 83 FT_UNKNOWN 84 }; 85 86 #ifndef NO_BZIP2_SUPPORT 87 #include <bzlib.h> 88 89 #define BZ2_SUFFIX ".bz2" 90 #define BZIP2_MAGIC "\102\132\150" 91 #endif 92 93 #ifndef NO_COMPRESS_SUPPORT 94 #define Z_SUFFIX ".Z" 95 #define Z_MAGIC "\037\235" 96 #endif 97 98 #define GZ_SUFFIX ".gz" 99 100 #define BUFLEN (64 * 1024) 101 102 #define GZIP_MAGIC0 0x1F 103 #define GZIP_MAGIC1 0x8B 104 #define GZIP_OMAGIC1 0x9E 105 106 #define GZIP_TIMESTAMP (off_t)4 107 #define GZIP_ORIGNAME (off_t)10 108 109 #define HEAD_CRC 0x02 110 #define EXTRA_FIELD 0x04 111 #define ORIG_NAME 0x08 112 #define COMMENT 0x10 113 114 #define OS_CODE 3 /* Unix */ 115 116 typedef struct { 117 const char *zipped; 118 int ziplen; 119 const char *normal; /* for unzip - must not be longer than zipped */ 120 } suffixes_t; 121 static suffixes_t suffixes[] = { 122 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N} 123 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */ 124 #ifndef SMALL 125 SUFFIX(GZ_SUFFIX, ""), 126 SUFFIX(".z", ""), 127 SUFFIX("-gz", ""), 128 SUFFIX("-z", ""), 129 SUFFIX("_z", ""), 130 SUFFIX(".taz", ".tar"), 131 SUFFIX(".tgz", ".tar"), 132 #ifndef NO_BZIP2_SUPPORT 133 SUFFIX(BZ2_SUFFIX, ""), 134 #endif 135 #ifndef NO_COMPRESS_SUPPORT 136 SUFFIX(Z_SUFFIX, ""), 137 #endif 138 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */ 139 #endif /* SMALL */ 140 #undef SUFFIX 141 }; 142 #define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0]) 143 144 static const char gzip_version[] = "NetBSD gzip 20040830"; 145 146 static int cflag; /* stdout mode */ 147 static int dflag; /* decompress mode */ 148 static int lflag; /* list mode */ 149 static int numflag = 6; /* gzip -1..-9 value */ 150 151 #ifndef SMALL 152 static int fflag; /* force mode */ 153 static int nflag; /* don't save name/timestamp */ 154 static int Nflag; /* don't restore name/timestamp */ 155 static int qflag; /* quiet mode */ 156 static int rflag; /* recursive mode */ 157 static int tflag; /* test */ 158 static int vflag; /* verbose mode */ 159 #else 160 #define qflag 0 161 #define tflag 0 162 #endif 163 164 static int exit_value = 0; /* exit value */ 165 166 static char *infile; /* name of file coming in */ 167 168 static void maybe_err(const char *fmt, ...) 169 __attribute__((__format__(__printf__, 1, 2))); 170 #ifndef NO_BZIP2_SUPPORT 171 static void maybe_errx(const char *fmt, ...) 172 __attribute__((__format__(__printf__, 1, 2))); 173 #endif 174 static void maybe_warn(const char *fmt, ...) 175 __attribute__((__format__(__printf__, 1, 2))); 176 static void maybe_warnx(const char *fmt, ...) 177 __attribute__((__format__(__printf__, 1, 2))); 178 static enum filetype file_gettype(u_char *); 179 #ifdef SMALL 180 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz) 181 #endif 182 static off_t gz_compress(int, int, off_t *, const char *, uint32_t); 183 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *); 184 static off_t file_compress(char *, char *, size_t); 185 static off_t file_uncompress(char *, char *, size_t); 186 static void handle_pathname(char *); 187 static void handle_file(char *, struct stat *); 188 static void handle_stdin(void); 189 static void handle_stdout(void); 190 static void print_ratio(off_t, off_t, FILE *); 191 static void print_list(int fd, off_t, const char *, time_t); 192 static void usage(void); 193 static void display_version(void); 194 static const suffixes_t *check_suffix(char *, int); 195 196 #ifdef SMALL 197 #define unlink_input(f, sb) unlink(f) 198 #else 199 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd); 200 static void prepend_gzip(char *, int *, char ***); 201 static void handle_dir(char *, struct stat *); 202 static void print_verbage(const char *, const char *, off_t, off_t); 203 static void print_test(const char *, int); 204 static void copymodes(const char *, struct stat *); 205 static int check_outfile(const char *outfile, struct stat *sb); 206 #endif 207 208 #ifndef NO_BZIP2_SUPPORT 209 static off_t unbzip2(int, int, char *, size_t, off_t *); 210 #endif 211 212 #ifndef NO_COMPRESS_SUPPORT 213 static FILE *zdopen(int); 214 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *); 215 #endif 216 217 int main(int, char *p[]); 218 219 #ifdef SMALL 220 #define getopt_long(a,b,c,d,e) getopt(a,b,c) 221 #else 222 static const struct option longopts[] = { 223 { "stdout", no_argument, 0, 'c' }, 224 { "to-stdout", no_argument, 0, 'c' }, 225 { "decompress", no_argument, 0, 'd' }, 226 { "uncompress", no_argument, 0, 'd' }, 227 { "force", no_argument, 0, 'f' }, 228 { "help", no_argument, 0, 'h' }, 229 { "list", no_argument, 0, 'l' }, 230 { "no-name", no_argument, 0, 'n' }, 231 { "name", no_argument, 0, 'N' }, 232 { "quiet", no_argument, 0, 'q' }, 233 { "recursive", no_argument, 0, 'r' }, 234 { "suffix", required_argument, 0, 'S' }, 235 { "test", no_argument, 0, 't' }, 236 { "verbose", no_argument, 0, 'v' }, 237 { "version", no_argument, 0, 'V' }, 238 { "fast", no_argument, 0, '1' }, 239 { "best", no_argument, 0, '9' }, 240 #if 0 241 /* 242 * This is what else GNU gzip implements. --ascii isn't useful 243 * on NetBSD, and I don't care to have a --license. 244 */ 245 { "ascii", no_argument, 0, 'a' }, 246 { "license", no_argument, 0, 'L' }, 247 #endif 248 { NULL, no_argument, 0, 0 }, 249 }; 250 #endif 251 252 int 253 main(int argc, char **argv) 254 { 255 const char *progname = getprogname(); 256 #ifndef SMALL 257 char *gzip; 258 int len; 259 #endif 260 int ch; 261 262 /* XXX set up signals */ 263 264 #ifndef SMALL 265 if ((gzip = getenv("GZIP")) != NULL) 266 prepend_gzip(gzip, &argc, &argv); 267 #endif 268 269 /* 270 * XXX 271 * handle being called `gunzip', `zcat' and `gzcat' 272 */ 273 if (strcmp(progname, "gunzip") == 0) 274 dflag = 1; 275 else if (strcmp(progname, "zcat") == 0 || 276 strcmp(progname, "gzcat") == 0) 277 dflag = cflag = 1; 278 279 #ifdef SMALL 280 #define OPT_LIST "cdhHltV123456789" 281 #else 282 #define OPT_LIST "cdfhHlnNqrS:tvV123456789" 283 #endif 284 285 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) { 286 switch (ch) { 287 case 'c': 288 cflag = 1; 289 break; 290 case 'd': 291 dflag = 1; 292 break; 293 case 'l': 294 lflag = 1; 295 dflag = 1; 296 break; 297 case 'V': 298 display_version(); 299 /* NOTREACHED */ 300 case '1': case '2': case '3': 301 case '4': case '5': case '6': 302 case '7': case '8': case '9': 303 numflag = ch - '0'; 304 break; 305 #ifndef SMALL 306 case 'f': 307 fflag = 1; 308 break; 309 case 'n': 310 nflag = 1; 311 Nflag = 0; 312 break; 313 case 'N': 314 nflag = 0; 315 Nflag = 1; 316 break; 317 case 'q': 318 qflag = 1; 319 break; 320 case 'r': 321 rflag = 1; 322 break; 323 case 'S': 324 len = strlen(optarg); 325 if (len != 0) { 326 suffixes[0].zipped = optarg; 327 suffixes[0].ziplen = len; 328 } else { 329 suffixes[NUM_SUFFIXES - 1].zipped = ""; 330 suffixes[NUM_SUFFIXES - 1].ziplen = 0; 331 } 332 break; 333 case 't': 334 cflag = 1; 335 tflag = 1; 336 dflag = 1; 337 break; 338 case 'v': 339 vflag = 1; 340 break; 341 #endif 342 default: 343 usage(); 344 /* NOTREACHED */ 345 } 346 } 347 argv += optind; 348 argc -= optind; 349 350 if (argc == 0) { 351 if (dflag) /* stdin mode */ 352 handle_stdin(); 353 else /* stdout mode */ 354 handle_stdout(); 355 } else { 356 do { 357 handle_pathname(argv[0]); 358 } while (*++argv); 359 } 360 #ifndef SMALL 361 if (qflag == 0 && lflag && argc > 1) 362 print_list(-1, 0, "(totals)", 0); 363 #endif 364 exit(exit_value); 365 } 366 367 /* maybe print a warning */ 368 void 369 maybe_warn(const char *fmt, ...) 370 { 371 va_list ap; 372 373 if (qflag == 0) { 374 va_start(ap, fmt); 375 vwarn(fmt, ap); 376 va_end(ap); 377 } 378 if (exit_value == 0) 379 exit_value = 1; 380 } 381 382 /* ... without an errno. */ 383 void 384 maybe_warnx(const char *fmt, ...) 385 { 386 va_list ap; 387 388 if (qflag == 0) { 389 va_start(ap, fmt); 390 vwarnx(fmt, ap); 391 va_end(ap); 392 } 393 if (exit_value == 0) 394 exit_value = 1; 395 } 396 397 /* maybe print an error */ 398 void 399 maybe_err(const char *fmt, ...) 400 { 401 va_list ap; 402 403 if (qflag == 0) { 404 va_start(ap, fmt); 405 vwarn(fmt, ap); 406 va_end(ap); 407 } 408 exit(2); 409 } 410 411 #ifndef NO_BZIP2_SUPPORT 412 /* ... without an errno. */ 413 void 414 maybe_errx(const char *fmt, ...) 415 { 416 va_list ap; 417 418 if (qflag == 0) { 419 va_start(ap, fmt); 420 vwarnx(fmt, ap); 421 va_end(ap); 422 } 423 exit(2); 424 } 425 #endif 426 427 #ifndef SMALL 428 /* split up $GZIP and prepend it to the argument list */ 429 static void 430 prepend_gzip(char *gzip, int *argc, char ***argv) 431 { 432 char *s, **nargv, **ac; 433 int nenvarg = 0, i; 434 435 /* scan how many arguments there are */ 436 for (s = gzip; *s; s++) { 437 if (*s == ' ' || *s == '\t') 438 continue; 439 nenvarg++; 440 for (; *s; s++) 441 if (*s == ' ' || *s == '\t') 442 break; 443 if (*s == 0x0) 444 break; 445 } 446 /* punt early */ 447 if (nenvarg == 0) 448 return; 449 450 *argc += nenvarg; 451 ac = *argv; 452 453 nargv = (char **)malloc((*argc + 1) * sizeof(char *)); 454 if (nargv == NULL) 455 maybe_err("malloc"); 456 457 /* stash this away */ 458 *argv = nargv; 459 460 /* copy the program name first */ 461 i = 0; 462 nargv[i++] = *(ac++); 463 464 /* take a copy of $GZIP and add it to the array */ 465 s = strdup(gzip); 466 if (s == NULL) 467 maybe_err("strdup"); 468 for (; *s; s++) { 469 if (*s == ' ' || *s == '\t') 470 continue; 471 nargv[i++] = s; 472 for (; *s; s++) 473 if (*s == ' ' || *s == '\t') { 474 *s = 0; 475 break; 476 } 477 } 478 479 /* copy the original arguments and a NULL */ 480 while (*ac) 481 nargv[i++] = *(ac++); 482 nargv[i] = NULL; 483 } 484 #endif 485 486 /* compress input to output. Return bytes read, -1 on error */ 487 static off_t 488 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime) 489 { 490 z_stream z; 491 char *outbufp, *inbufp; 492 off_t in_tot = 0, out_tot = 0; 493 ssize_t in_size; 494 int i, error; 495 uLong crc; 496 #ifdef SMALL 497 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0, 498 0, 0, 0, 0, 499 0, OS_CODE }; 500 #endif 501 502 outbufp = malloc(BUFLEN); 503 inbufp = malloc(BUFLEN); 504 if (outbufp == NULL || inbufp == NULL) { 505 maybe_err("malloc failed"); 506 goto out; 507 } 508 509 memset(&z, 0, sizeof z); 510 z.zalloc = Z_NULL; 511 z.zfree = Z_NULL; 512 z.opaque = 0; 513 514 #ifdef SMALL 515 memcpy(outbufp, header, sizeof header); 516 i = sizeof header; 517 #else 518 if (nflag != 0) { 519 mtime = 0; 520 origname = ""; 521 } 522 523 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s", 524 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 525 *origname ? ORIG_NAME : 0, 526 mtime & 0xff, 527 (mtime >> 8) & 0xff, 528 (mtime >> 16) & 0xff, 529 (mtime >> 24) & 0xff, 530 numflag == 1 ? 4 : numflag == 9 ? 2 : 0, 531 OS_CODE, origname); 532 if (i >= BUFLEN) 533 /* this need PATH_MAX > BUFLEN ... */ 534 maybe_err("snprintf"); 535 if (*origname) 536 i++; 537 #endif 538 539 z.next_out = outbufp + i; 540 z.avail_out = BUFLEN - i; 541 542 error = deflateInit2(&z, numflag, Z_DEFLATED, 543 -MAX_WBITS, 8, Z_DEFAULT_STRATEGY); 544 if (error != Z_OK) { 545 maybe_warnx("deflateInit2 failed"); 546 in_tot = -1; 547 goto out; 548 } 549 550 crc = crc32(0L, Z_NULL, 0); 551 for (;;) { 552 if (z.avail_out == 0) { 553 if (write(out, outbufp, BUFLEN) != BUFLEN) { 554 maybe_warn("write"); 555 in_tot = -1; 556 goto out; 557 } 558 559 out_tot += BUFLEN; 560 z.next_out = outbufp; 561 z.avail_out = BUFLEN; 562 } 563 564 if (z.avail_in == 0) { 565 in_size = read(in, inbufp, BUFLEN); 566 if (in_size < 0) { 567 maybe_warn("read"); 568 in_tot = -1; 569 goto out; 570 } 571 if (in_size == 0) 572 break; 573 574 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size); 575 in_tot += in_size; 576 z.next_in = inbufp; 577 z.avail_in = in_size; 578 } 579 580 error = deflate(&z, Z_NO_FLUSH); 581 if (error != Z_OK && error != Z_STREAM_END) { 582 maybe_warnx("deflate failed"); 583 in_tot = -1; 584 goto out; 585 } 586 } 587 588 /* clean up */ 589 for (;;) { 590 size_t len; 591 592 error = deflate(&z, Z_FINISH); 593 if (error != Z_OK && error != Z_STREAM_END) { 594 maybe_warnx("deflate failed"); 595 in_tot = -1; 596 goto out; 597 } 598 599 len = (char *)z.next_out - outbufp; 600 601 if (write(out, outbufp, len) != len) { 602 maybe_warn("write"); 603 out_tot = -1; 604 goto out; 605 } 606 out_tot += len; 607 z.next_out = outbufp; 608 z.avail_out = BUFLEN; 609 610 if (error == Z_STREAM_END) 611 break; 612 } 613 614 if (deflateEnd(&z) != Z_OK) { 615 maybe_warnx("deflateEnd failed"); 616 in_tot = -1; 617 goto out; 618 } 619 620 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c", 621 (int)crc & 0xff, 622 (int)(crc >> 8) & 0xff, 623 (int)(crc >> 16) & 0xff, 624 (int)(crc >> 24) & 0xff, 625 (int)in_tot & 0xff, 626 (int)(in_tot >> 8) & 0xff, 627 (int)(in_tot >> 16) & 0xff, 628 (int)(in_tot >> 24) & 0xff); 629 if (i != 8) 630 maybe_err("snprintf"); 631 if (write(out, outbufp, i) != i) { 632 maybe_warn("write"); 633 in_tot = -1; 634 } else 635 out_tot += i; 636 637 out: 638 if (inbufp != NULL) 639 free(inbufp); 640 if (outbufp != NULL) 641 free(outbufp); 642 if (gsizep) 643 *gsizep = out_tot; 644 return in_tot; 645 } 646 647 /* 648 * uncompress input to output then close the input. return the 649 * uncompressed size written, and put the compressed sized read 650 * into `*gsizep'. 651 */ 652 static off_t 653 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep, 654 const char *filename) 655 { 656 z_stream z; 657 char *outbufp, *inbufp; 658 off_t out_tot, out_sub_tot, in_tot; 659 enum { 660 GZSTATE_MAGIC0, 661 GZSTATE_MAGIC1, 662 GZSTATE_METHOD, 663 GZSTATE_FLAGS, 664 GZSTATE_SKIPPING, 665 GZSTATE_EXTRA, 666 GZSTATE_EXTRA2, 667 GZSTATE_EXTRA3, 668 GZSTATE_ORIGNAME, 669 GZSTATE_COMMENT, 670 GZSTATE_HEAD_CRC1, 671 GZSTATE_HEAD_CRC2, 672 GZSTATE_INIT, 673 GZSTATE_READ, 674 GZSTATE_CRC, 675 GZSTATE_LEN, 676 } state = GZSTATE_MAGIC0; 677 int flags = 0, skip_count = 0; 678 int error, done_reading = 0; 679 uLong crc; 680 681 #define ADVANCE() { z.next_in++; z.avail_in--; } 682 683 if ((outbufp = malloc(BUFLEN)) == NULL) { 684 maybe_err("malloc failed"); 685 goto out2; 686 } 687 if ((inbufp = malloc(BUFLEN)) == NULL) { 688 maybe_err("malloc failed"); 689 goto out1; 690 } 691 692 memset(&z, 0, sizeof z); 693 z.avail_in = prelen; 694 z.next_in = pre; 695 z.avail_out = BUFLEN; 696 z.next_out = outbufp; 697 z.zalloc = NULL; 698 z.zfree = NULL; 699 z.opaque = 0; 700 701 in_tot = prelen; 702 out_tot = 0; 703 704 for (;;) { 705 if (z.avail_in == 0 && done_reading == 0) { 706 size_t in_size = read(in, inbufp, BUFLEN); 707 708 if (in_size == -1) { 709 #ifndef SMALL 710 if (tflag && vflag) 711 print_test(filename, 0); 712 #endif 713 maybe_warn("failed to read stdin"); 714 out_tot = -1; 715 goto stop; 716 } else if (in_size == 0) 717 done_reading = 1; 718 719 z.avail_in = in_size; 720 z.next_in = inbufp; 721 722 in_tot += in_size; 723 } 724 if (z.avail_in == 0) { 725 if (done_reading && state != GZSTATE_MAGIC0) 726 maybe_warnx("%s: unexpected end of file", 727 filename); 728 goto stop; 729 } 730 switch (state) { 731 case GZSTATE_MAGIC0: 732 if (*z.next_in != GZIP_MAGIC0) { 733 maybe_warnx("input not gziped (MAGIC0)"); 734 out_tot = -1; 735 goto stop; 736 } 737 ADVANCE(); 738 state++; 739 out_sub_tot = 0; 740 crc = crc32(0L, Z_NULL, 0); 741 break; 742 743 case GZSTATE_MAGIC1: 744 if (*z.next_in != GZIP_MAGIC1 && 745 *z.next_in != GZIP_OMAGIC1) { 746 maybe_warnx("input not gziped (MAGIC1)"); 747 out_tot = -1; 748 goto stop; 749 } 750 ADVANCE(); 751 state++; 752 break; 753 754 case GZSTATE_METHOD: 755 if (*z.next_in != Z_DEFLATED) { 756 maybe_warnx("unknown compression method"); 757 out_tot = -1; 758 goto stop; 759 } 760 ADVANCE(); 761 state++; 762 break; 763 764 case GZSTATE_FLAGS: 765 flags = *z.next_in; 766 ADVANCE(); 767 skip_count = 6; 768 state++; 769 break; 770 771 case GZSTATE_SKIPPING: 772 if (skip_count > 0) { 773 skip_count--; 774 ADVANCE(); 775 } else 776 state++; 777 break; 778 779 case GZSTATE_EXTRA: 780 if ((flags & EXTRA_FIELD) == 0) { 781 state = GZSTATE_ORIGNAME; 782 break; 783 } 784 skip_count = *z.next_in; 785 ADVANCE(); 786 state++; 787 break; 788 789 case GZSTATE_EXTRA2: 790 skip_count |= ((*z.next_in) << 8); 791 ADVANCE(); 792 state++; 793 break; 794 795 case GZSTATE_EXTRA3: 796 if (skip_count > 0) { 797 skip_count--; 798 ADVANCE(); 799 } else 800 state++; 801 break; 802 803 case GZSTATE_ORIGNAME: 804 if ((flags & ORIG_NAME) == 0) { 805 state++; 806 break; 807 } 808 if (*z.next_in == 0) 809 state++; 810 ADVANCE(); 811 break; 812 813 case GZSTATE_COMMENT: 814 if ((flags & COMMENT) == 0) { 815 state++; 816 break; 817 } 818 if (*z.next_in == 0) 819 state++; 820 ADVANCE(); 821 break; 822 823 case GZSTATE_HEAD_CRC1: 824 if (flags & HEAD_CRC) 825 skip_count = 2; 826 else 827 skip_count = 0; 828 state++; 829 break; 830 831 case GZSTATE_HEAD_CRC2: 832 if (skip_count > 0) { 833 skip_count--; 834 ADVANCE(); 835 } else 836 state++; 837 break; 838 839 case GZSTATE_INIT: 840 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) { 841 maybe_warnx("failed to inflateInit"); 842 out_tot = -1; 843 goto stop; 844 } 845 state++; 846 break; 847 848 case GZSTATE_READ: 849 error = inflate(&z, Z_FINISH); 850 /* Z_BUF_ERROR goes with Z_FINISH... */ 851 if (error == Z_STREAM_END || error == Z_BUF_ERROR) { 852 ssize_t wr = BUFLEN - z.avail_out; 853 854 /* Nothing left? */ 855 if (wr == 0) 856 goto stop; 857 858 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 859 if ( 860 #ifndef SMALL 861 /* don't write anything with -t */ 862 tflag == 0 && 863 #endif 864 write(out, outbufp, wr) != wr) { 865 maybe_warn("error writing to output"); 866 out_tot = -1; 867 goto stop; 868 } 869 870 out_tot += wr; 871 out_sub_tot += wr; 872 873 if (error == Z_STREAM_END) { 874 inflateEnd(&z); 875 state++; 876 } 877 878 z.next_out = outbufp; 879 z.avail_out = BUFLEN; 880 881 break; 882 } 883 case GZSTATE_CRC: 884 { 885 static int empty_buffer = 0; 886 uLong origcrc; 887 888 if (z.avail_in < 4) { 889 if (!done_reading && empty_buffer++ < 4) 890 continue; 891 maybe_warnx("truncated input"); 892 out_tot = -1; 893 goto stop; 894 } 895 empty_buffer = 0; 896 origcrc = ((unsigned)z.next_in[0] & 0xff) | 897 ((unsigned)z.next_in[1] & 0xff) << 8 | 898 ((unsigned)z.next_in[2] & 0xff) << 16 | 899 ((unsigned)z.next_in[3] & 0xff) << 24; 900 if (origcrc != crc) { 901 maybe_warnx("invalid compressed" 902 " data--crc error"); 903 out_tot = -1; 904 goto stop; 905 } 906 } 907 908 z.avail_in -= 4; 909 z.next_in += 4; 910 911 if (!z.avail_in) 912 goto stop; 913 state++; 914 break; 915 case GZSTATE_LEN: 916 { 917 static int empty_buffer = 0; 918 uLong origlen; 919 920 if (z.avail_in < 4) { 921 if (!done_reading && empty_buffer++ < 4) 922 continue; 923 maybe_warnx("truncated input"); 924 out_tot = -1; 925 goto stop; 926 } 927 empty_buffer = 0; 928 origlen = ((unsigned)z.next_in[0] & 0xff) | 929 ((unsigned)z.next_in[1] & 0xff) << 8 | 930 ((unsigned)z.next_in[2] & 0xff) << 16 | 931 ((unsigned)z.next_in[3] & 0xff) << 24; 932 933 if (origlen != out_sub_tot) { 934 maybe_warnx("invalid compressed" 935 " data--length error"); 936 out_tot = -1; 937 goto stop; 938 } 939 } 940 941 z.avail_in -= 4; 942 z.next_in += 4; 943 944 if (error < 0) { 945 maybe_warnx("decompression error"); 946 out_tot = -1; 947 goto stop; 948 } 949 state = GZSTATE_MAGIC0; 950 break; 951 } 952 continue; 953 stop: 954 break; 955 } 956 if (state > GZSTATE_INIT) 957 inflateEnd(&z); 958 959 #ifndef SMALL 960 if (tflag && vflag) 961 print_test(filename, out_tot != -1); 962 #endif 963 964 free(inbufp); 965 out1: 966 free(outbufp); 967 out2: 968 if (gsizep) 969 *gsizep = in_tot; 970 return (out_tot); 971 } 972 973 #ifndef SMALL 974 /* 975 * set the owner, mode, flags & utimes for a file 976 */ 977 static void 978 copymodes(const char *file, struct stat *sbp) 979 { 980 struct timeval times[2]; 981 982 /* 983 * If we have no info on the input, give this file some 984 * default values and return.. 985 */ 986 if (sbp == NULL) { 987 mode_t mask = umask(022); 988 989 (void)chmod(file, DEFFILEMODE & ~mask); 990 (void)umask(mask); 991 return; 992 } 993 994 /* if the chown fails, remove set-id bits as-per compress(1) */ 995 if (chown(file, sbp->st_uid, sbp->st_gid) < 0) { 996 if (errno != EPERM) 997 maybe_warn("couldn't chown: %s", file); 998 sbp->st_mode &= ~(S_ISUID|S_ISGID); 999 } 1000 1001 /* we only allow set-id and the 9 normal permission bits */ 1002 sbp->st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1003 if (chmod(file, sbp->st_mode) < 0) 1004 maybe_warn("couldn't chmod: %s", file); 1005 1006 /* only try flags if they exist already */ 1007 if (sbp->st_flags != 0 && chflags(file, sbp->st_flags) < 0) 1008 maybe_warn("couldn't chflags: %s", file); 1009 1010 TIMESPEC_TO_TIMEVAL(×[0], &sbp->st_atimespec); 1011 TIMESPEC_TO_TIMEVAL(×[1], &sbp->st_mtimespec); 1012 if (utimes(file, times) < 0) 1013 maybe_warn("couldn't utimes: %s", file); 1014 } 1015 #endif 1016 1017 /* what sort of file is this? */ 1018 static enum filetype 1019 file_gettype(u_char *buf) 1020 { 1021 1022 if (buf[0] == GZIP_MAGIC0 && 1023 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1024 return FT_GZIP; 1025 else 1026 #ifndef NO_BZIP2_SUPPORT 1027 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1028 buf[3] >= '0' && buf[3] <= '9') 1029 return FT_BZIP2; 1030 else 1031 #endif 1032 #ifndef NO_COMPRESS_SUPPORT 1033 if (memcmp(buf, Z_MAGIC, 2) == 0) 1034 return FT_Z; 1035 else 1036 #endif 1037 return FT_UNKNOWN; 1038 } 1039 1040 #ifndef SMALL 1041 /* check the outfile is OK. */ 1042 static int 1043 check_outfile(const char *outfile, struct stat *sb) 1044 { 1045 int ok = 1; 1046 1047 if (lflag == 0 && stat(outfile, sb) == 0) { 1048 if (fflag) 1049 unlink(outfile); 1050 else if (isatty(STDIN_FILENO)) { 1051 char ans[10] = { 'n', '\0' }; /* default */ 1052 1053 fprintf(stderr, "%s already exists -- do you wish to " 1054 "overwrite (y or n)? " , outfile); 1055 (void)fgets(ans, sizeof(ans) - 1, stdin); 1056 if (ans[0] != 'y' && ans[0] != 'Y') { 1057 fprintf(stderr, "\tnot overwritting\n"); 1058 ok = 0; 1059 } else 1060 unlink(outfile); 1061 } else { 1062 maybe_warnx("%s already exists -- skipping", outfile); 1063 ok = 0; 1064 } 1065 } 1066 return ok; 1067 } 1068 1069 static void 1070 unlink_input(const char *file, struct stat *sb) 1071 { 1072 struct stat nsb; 1073 1074 if (stat(file, &nsb) != 0) 1075 /* Must be gone alrady */ 1076 return; 1077 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1078 /* Definitely a different file */ 1079 return; 1080 unlink(file); 1081 } 1082 #endif 1083 1084 static const suffixes_t * 1085 check_suffix(char *file, int xlate) 1086 { 1087 const suffixes_t *s; 1088 int len = strlen(file); 1089 char *sp; 1090 1091 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1092 /* if it doesn't fit in "a.suf", don't bother */ 1093 if (s->ziplen >= len) 1094 continue; 1095 sp = file + len - s->ziplen; 1096 if (strcmp(s->zipped, sp) != 0) 1097 continue; 1098 if (xlate) 1099 strcpy(sp, s->normal); 1100 return s; 1101 } 1102 return NULL; 1103 } 1104 1105 /* 1106 * compress the given file: create a corresponding .gz file and remove the 1107 * original. 1108 */ 1109 static off_t 1110 file_compress(char *file, char *outfile, size_t outsize) 1111 { 1112 int in; 1113 int out; 1114 off_t size, insize; 1115 #ifndef SMALL 1116 struct stat isb, osb; 1117 const suffixes_t *suff; 1118 #endif 1119 1120 in = open(file, O_RDONLY); 1121 if (in == -1) { 1122 maybe_warn("can't open %s", file); 1123 return -1; 1124 } 1125 1126 if (cflag == 0) { 1127 #ifndef SMALL 1128 if (stat(file, &isb) == 0) { 1129 if (isb.st_nlink > 1 && fflag == 0) { 1130 maybe_warnx("%s has %d other link%s -- " 1131 "skipping", file, isb.st_nlink - 1, 1132 isb.st_nlink == 1 ? "" : "s"); 1133 close(in); 1134 return -1; 1135 } 1136 } 1137 1138 if (fflag == 0 && (suff = check_suffix(file, 0)) 1139 && suff->zipped[0] != 0) { 1140 maybe_warnx("%s already has %s suffix -- unchanged", 1141 file, suff->zipped); 1142 close(in); 1143 return -1; 1144 } 1145 #endif 1146 1147 /* Add (usually) .gz to filename */ 1148 if (snprintf(outfile, outsize, "%s%s", 1149 file, suffixes[0].zipped) >= outsize) 1150 memcpy(outfile - suffixes[0].ziplen - 1, 1151 suffixes[0].zipped, suffixes[0].ziplen + 1); 1152 1153 #ifndef SMALL 1154 if (check_outfile(outfile, &osb) == 0) { 1155 close(in); 1156 return -1; 1157 } 1158 #endif 1159 } 1160 1161 if (cflag == 0) { 1162 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600); 1163 if (out == -1) { 1164 maybe_warn("could not create output: %s", outfile); 1165 fclose(stdin); 1166 return -1; 1167 } 1168 } else 1169 out = STDOUT_FILENO; 1170 1171 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1172 1173 (void)close(in); 1174 1175 /* 1176 * If there was an error, insize will be -1. 1177 * If we compressed to stdout, just return the size. 1178 * Otherwise stat the file and check it is the correct size. 1179 * We only blow away the file if we can stat the output and it 1180 * has the expected size. 1181 */ 1182 if (cflag != 0) 1183 return insize == -1 ? -1 : size; 1184 1185 if (close(out) == -1) 1186 maybe_warn("couldn't close ouput"); 1187 1188 #ifndef SMALL 1189 if (stat(outfile, &osb) < 0) { 1190 maybe_warn("couldn't stat: %s", outfile); 1191 goto bad_outfile; 1192 } 1193 1194 if (osb.st_size != size) { 1195 maybe_warnx("output file: %s wrong size (%" PRIdOFF 1196 " != %" PRIdOFF "), deleting", 1197 outfile, osb.st_size, size); 1198 goto bad_outfile; 1199 } 1200 1201 copymodes(outfile, &isb); 1202 #endif 1203 1204 /* output is good, ok to delete input */ 1205 unlink_input(file, &isb); 1206 return size; 1207 1208 #ifndef SMALL 1209 bad_outfile: 1210 maybe_warnx("leaving original %s", file); 1211 unlink(outfile); 1212 return size; 1213 #endif 1214 } 1215 1216 /* uncompress the given file and remove the original */ 1217 static off_t 1218 file_uncompress(char *file, char *outfile, size_t outsize) 1219 { 1220 struct stat isb, osb; 1221 off_t size; 1222 ssize_t rbytes; 1223 unsigned char header1[4]; 1224 enum filetype method; 1225 int fd, zfd = -1; 1226 #ifndef SMALL 1227 time_t timestamp = 0; 1228 unsigned char name[PATH_MAX + 1]; 1229 #endif 1230 1231 /* gather the old name info */ 1232 1233 fd = open(file, O_RDONLY); 1234 if (fd < 0) { 1235 maybe_warn("can't open %s", file); 1236 goto lose; 1237 } 1238 1239 strlcpy(outfile, file, outsize); 1240 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1241 maybe_warnx("%s: unknown suffix -- ignored", file); 1242 goto lose; 1243 } 1244 1245 rbytes = read(fd, header1, sizeof header1); 1246 if (rbytes != sizeof header1) { 1247 /* we don't want to fail here. */ 1248 #ifndef SMALL 1249 if (fflag) 1250 goto lose; 1251 #endif 1252 if (rbytes == -1) 1253 maybe_warn("can't read %s", file); 1254 else 1255 maybe_warnx("%s: unexpected end of file", file); 1256 goto lose; 1257 } 1258 1259 method = file_gettype(header1); 1260 1261 #ifndef SMALL 1262 if (fflag == 0 && method == FT_UNKNOWN) { 1263 maybe_warnx("%s: not in gzip format", file); 1264 goto lose; 1265 } 1266 1267 #endif 1268 1269 #ifndef SMALL 1270 if (method == FT_GZIP && Nflag) { 1271 unsigned char ts[4]; /* timestamp */ 1272 1273 if (pread(fd, ts, sizeof ts, GZIP_TIMESTAMP) != sizeof ts) { 1274 if (!fflag) 1275 maybe_warn("can't read %s", file); 1276 goto lose; 1277 } 1278 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0]; 1279 1280 if (header1[3] & ORIG_NAME) { 1281 rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME); 1282 if (rbytes < 0) { 1283 maybe_warn("can't read %s", file); 1284 goto lose; 1285 } 1286 if (name[0] != 0) { 1287 /* preserve original directory name */ 1288 char *dp = strrchr(file, '/'); 1289 if (dp == NULL) 1290 dp = file; 1291 else 1292 dp++; 1293 snprintf(outfile, outsize, "%.*s%.*s", 1294 (int) (dp - file), 1295 file, (int) rbytes, name); 1296 } 1297 } 1298 } 1299 #endif 1300 lseek(fd, 0, SEEK_SET); 1301 1302 if (cflag == 0 || lflag) { 1303 if (fstat(fd, &isb) != 0) 1304 goto lose; 1305 #ifndef SMALL 1306 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1307 maybe_warnx("%s has %d other links -- skipping", 1308 file, isb.st_nlink - 1); 1309 goto lose; 1310 } 1311 if (nflag == 0 && timestamp) 1312 isb.st_mtime = timestamp; 1313 if (check_outfile(outfile, &osb) == 0) 1314 goto lose; 1315 #endif 1316 } 1317 1318 if (cflag == 0 && lflag == 0) { 1319 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1320 if (zfd == STDOUT_FILENO) { 1321 /* We won't close STDOUT_FILENO later... */ 1322 zfd = dup(zfd); 1323 close(STDOUT_FILENO); 1324 } 1325 if (zfd == -1) { 1326 maybe_warn("can't open %s", outfile); 1327 goto lose; 1328 } 1329 } else 1330 zfd = STDOUT_FILENO; 1331 1332 #ifndef NO_BZIP2_SUPPORT 1333 if (method == FT_BZIP2) { 1334 1335 /* XXX */ 1336 if (lflag) { 1337 maybe_warnx("no -l with bzip2 files"); 1338 goto lose; 1339 } 1340 1341 size = unbzip2(fd, zfd, NULL, 0, NULL); 1342 } else 1343 #endif 1344 1345 #ifndef NO_COMPRESS_SUPPORT 1346 if (method == FT_Z) { 1347 FILE *in, *out; 1348 1349 /* XXX */ 1350 if (lflag) { 1351 maybe_warnx("no -l with Lempel-Ziv files"); 1352 goto lose; 1353 } 1354 1355 if ((in = zdopen(fd)) == NULL) { 1356 maybe_warn("zdopen for read: %s", file); 1357 goto lose; 1358 } 1359 1360 out = fdopen(dup(zfd), "w"); 1361 if (out == NULL) { 1362 maybe_warn("fdopen for write: %s", outfile); 1363 fclose(in); 1364 goto lose; 1365 } 1366 1367 size = zuncompress(in, out, NULL, 0, NULL); 1368 /* need to fclose() if ferror() is true... */ 1369 if (ferror(in) | fclose(in)) { 1370 maybe_warn("failed infile fclose"); 1371 unlink(outfile); 1372 (void)fclose(out); 1373 } 1374 if (fclose(out) != 0) { 1375 maybe_warn("failed outfile fclose"); 1376 unlink(outfile); 1377 goto lose; 1378 } 1379 } else 1380 #endif 1381 1382 #ifndef SMALL 1383 if (method == FT_UNKNOWN) { 1384 if (lflag) { 1385 maybe_warnx("no -l for unknown filetypes"); 1386 goto lose; 1387 } 1388 size = cat_fd(NULL, 0, NULL, fd); 1389 } else 1390 #endif 1391 { 1392 if (lflag) { 1393 print_list(fd, isb.st_size, outfile, isb.st_mtime); 1394 close(fd); 1395 return -1; /* XXX */ 1396 } 1397 1398 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1399 } 1400 1401 if (close(fd) != 0) 1402 maybe_warn("couldn't close input"); 1403 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1404 maybe_warn("couldn't close output"); 1405 1406 if (size == -1) { 1407 if (cflag == 0) 1408 unlink(outfile); 1409 maybe_warnx("%s: uncompress failed", file); 1410 return -1; 1411 } 1412 1413 /* if testing, or we uncompressed to stdout, this is all we need */ 1414 #ifndef SMALL 1415 if (tflag) 1416 return size; 1417 #endif 1418 if (cflag) 1419 return size; 1420 1421 /* 1422 * if we create a file... 1423 */ 1424 /* 1425 * if we can't stat the file, or we are uncompressing to 1426 * stdin, don't remove the file. 1427 */ 1428 if (stat(outfile, &osb) < 0) { 1429 maybe_warn("couldn't stat (leaving original): %s", 1430 outfile); 1431 return -1; 1432 } 1433 if (osb.st_size != size) { 1434 maybe_warn("stat gave different size: %" PRIdOFF 1435 " != %" PRIdOFF " (leaving original)", 1436 size, osb.st_size); 1437 unlink(outfile); 1438 return -1; 1439 } 1440 unlink_input(file, &isb); 1441 #ifndef SMALL 1442 copymodes(outfile, &isb); 1443 #endif 1444 return size; 1445 1446 lose: 1447 if (fd != -1) 1448 close(fd); 1449 if (zfd != -1 && zfd != STDOUT_FILENO) 1450 close(fd); 1451 return -1; 1452 } 1453 1454 #ifndef SMALL 1455 static off_t 1456 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd) 1457 { 1458 char buf[BUFLEN]; 1459 size_t rv; 1460 off_t in_tot; 1461 1462 in_tot = count; 1463 if (write(STDOUT_FILENO, prepend, count) != count) { 1464 maybe_warn("write to stdout"); 1465 return -1; 1466 } 1467 for (;;) { 1468 rv = read(fd, buf, sizeof buf); 1469 if (rv == 0) 1470 break; 1471 if (rv < 0) { 1472 maybe_warn("read from fd %d", fd); 1473 break; 1474 } 1475 1476 if (write(STDOUT_FILENO, buf, rv) != rv) { 1477 maybe_warn("write to stdout"); 1478 break; 1479 } 1480 in_tot += rv; 1481 } 1482 1483 if (gsizep) 1484 *gsizep = in_tot; 1485 return (in_tot); 1486 } 1487 #endif 1488 1489 static void 1490 handle_stdin(void) 1491 { 1492 unsigned char header1[4]; 1493 off_t usize, gsize; 1494 enum filetype method; 1495 #ifndef NO_COMPRESS_SUPPORT 1496 FILE *in; 1497 #endif 1498 1499 #ifndef SMALL 1500 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1501 maybe_warnx("standard input is a terminal -- ignoring"); 1502 return; 1503 } 1504 #endif 1505 1506 if (lflag) { 1507 struct stat isb; 1508 1509 /* XXX could read the whole file, etc. */ 1510 if (fstat(STDIN_FILENO, &isb) < 0) { 1511 maybe_warn("fstat"); 1512 return; 1513 } 1514 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime); 1515 return; 1516 } 1517 1518 if (read(STDIN_FILENO, header1, sizeof header1) != sizeof header1) { 1519 maybe_warn("can't read stdin"); 1520 return; 1521 } 1522 1523 method = file_gettype(header1); 1524 switch (method) { 1525 default: 1526 #ifndef SMALL 1527 if (fflag == 0) { 1528 maybe_warnx("unknown compression format"); 1529 return; 1530 } 1531 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO); 1532 break; 1533 #endif 1534 case FT_GZIP: 1535 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1536 header1, sizeof header1, &gsize, "(stdin)"); 1537 break; 1538 #ifndef NO_BZIP2_SUPPORT 1539 case FT_BZIP2: 1540 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1541 header1, sizeof header1, &gsize); 1542 break; 1543 #endif 1544 #ifndef NO_COMPRESS_SUPPORT 1545 case FT_Z: 1546 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1547 maybe_warnx("zopen of stdin"); 1548 return; 1549 } 1550 1551 usize = zuncompress(in, stdout, header1, sizeof header1, &gsize); 1552 fclose(in); 1553 break; 1554 #endif 1555 } 1556 1557 #ifndef SMALL 1558 if (vflag && !tflag && usize != -1 && gsize != -1) 1559 print_verbage(NULL, NULL, usize, gsize); 1560 #endif 1561 1562 } 1563 1564 static void 1565 handle_stdout(void) 1566 { 1567 off_t gsize, usize; 1568 1569 #ifndef SMALL 1570 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1571 maybe_warnx("standard output is a terminal -- ignoring"); 1572 return; 1573 } 1574 #endif 1575 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", 0); 1576 1577 #ifndef SMALL 1578 if (vflag && !tflag && usize != -1 && gsize != -1) 1579 print_verbage(NULL, NULL, usize, gsize); 1580 #endif 1581 } 1582 1583 /* do what is asked for, for the path name */ 1584 static void 1585 handle_pathname(char *path) 1586 { 1587 char *opath = path, *s = NULL; 1588 ssize_t len; 1589 int slen; 1590 struct stat sb; 1591 1592 /* check for stdout/stdin */ 1593 if (path[0] == '-' && path[1] == '\0') { 1594 if (dflag) 1595 handle_stdin(); 1596 else 1597 handle_stdout(); 1598 return; 1599 } 1600 1601 retry: 1602 if (stat(path, &sb) < 0) { 1603 /* lets try <path>.gz if we're decompressing */ 1604 if (dflag && s == NULL && errno == ENOENT) { 1605 len = strlen(path); 1606 slen = suffixes[0].ziplen; 1607 s = malloc(len + slen + 1); 1608 if (s == NULL) 1609 maybe_err("malloc"); 1610 memcpy(s, path, len); 1611 memcpy(s + len, suffixes[0].zipped, slen + 1); 1612 path = s; 1613 goto retry; 1614 } 1615 maybe_warn("can't stat: %s", opath); 1616 goto out; 1617 } 1618 1619 if (S_ISDIR(sb.st_mode)) { 1620 #ifndef SMALL 1621 if (rflag) 1622 handle_dir(path, &sb); 1623 else 1624 #endif 1625 maybe_warnx("%s is a directory", path); 1626 goto out; 1627 } 1628 1629 if (S_ISREG(sb.st_mode)) 1630 handle_file(path, &sb); 1631 else 1632 maybe_warnx("%s is not a regular file", path); 1633 1634 out: 1635 if (s) 1636 free(s); 1637 } 1638 1639 /* compress/decompress a file */ 1640 static void 1641 handle_file(char *file, struct stat *sbp) 1642 { 1643 off_t usize, gsize; 1644 char outfile[PATH_MAX]; 1645 1646 infile = file; 1647 if (dflag) { 1648 usize = file_uncompress(file, outfile, sizeof(outfile)); 1649 if (usize == -1) 1650 return; 1651 gsize = sbp->st_size; 1652 } else { 1653 gsize = file_compress(file, outfile, sizeof(outfile)); 1654 if (gsize == -1) 1655 return; 1656 usize = sbp->st_size; 1657 } 1658 1659 1660 #ifndef SMALL 1661 if (vflag && !tflag) 1662 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 1663 #endif 1664 } 1665 1666 #ifndef SMALL 1667 /* this is used with -r to recursively descend directories */ 1668 static void 1669 handle_dir(char *dir, struct stat *sbp) 1670 { 1671 char *path_argv[2]; 1672 FTS *fts; 1673 FTSENT *entry; 1674 1675 path_argv[0] = dir; 1676 path_argv[1] = 0; 1677 fts = fts_open(path_argv, FTS_PHYSICAL, NULL); 1678 if (fts == NULL) { 1679 warn("couldn't fts_open %s", dir); 1680 return; 1681 } 1682 1683 while ((entry = fts_read(fts))) { 1684 switch(entry->fts_info) { 1685 case FTS_D: 1686 case FTS_DP: 1687 continue; 1688 1689 case FTS_DNR: 1690 case FTS_ERR: 1691 case FTS_NS: 1692 maybe_warn("%s", entry->fts_path); 1693 continue; 1694 case FTS_F: 1695 handle_file(entry->fts_name, entry->fts_statp); 1696 } 1697 } 1698 (void)fts_close(fts); 1699 } 1700 #endif 1701 1702 /* print a ratio - size reduction as a fraction of uncompressed size */ 1703 static void 1704 print_ratio(off_t in, off_t out, FILE *where) 1705 { 1706 int percent10; /* 10 * percent */ 1707 off_t diff; 1708 char buff[8]; 1709 int len; 1710 1711 diff = in - out/2; 1712 if (diff <= 0) 1713 /* 1714 * Output is more than double size of input! print -99.9% 1715 * Quite possibly we've failed to get the original size. 1716 */ 1717 percent10 = -999; 1718 else { 1719 /* 1720 * We only need 12 bits of result from the final division, 1721 * so reduce the values until a 32bit division will suffice. 1722 */ 1723 while (in > 0x100000) { 1724 diff >>= 1; 1725 in >>= 1; 1726 } 1727 if (in != 0) 1728 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 1729 else 1730 percent10 = 0; 1731 } 1732 1733 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 1734 /* Move the '.' to before the last digit */ 1735 buff[len - 1] = buff[len - 2]; 1736 buff[len - 2] = '.'; 1737 fprintf(where, "%5s%%", buff); 1738 } 1739 1740 #ifndef SMALL 1741 /* print compression statistics, and the new name (if there is one!) */ 1742 static void 1743 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 1744 { 1745 if (file) 1746 fprintf(stderr, "%s:%s ", file, 1747 strlen(file) < 7 ? "\t\t" : "\t"); 1748 print_ratio(usize, gsize, stderr); 1749 if (nfile) 1750 fprintf(stderr, " -- replaced with %s", nfile); 1751 fprintf(stderr, "\n"); 1752 fflush(stderr); 1753 } 1754 1755 /* print test results */ 1756 static void 1757 print_test(const char *file, int ok) 1758 { 1759 1760 if (exit_value == 0 && ok == 0) 1761 exit_value = 1; 1762 fprintf(stderr, "%s:%s %s\n", file, 1763 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 1764 fflush(stderr); 1765 } 1766 #endif 1767 1768 /* print a file's info ala --list */ 1769 /* eg: 1770 compressed uncompressed ratio uncompressed_name 1771 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 1772 */ 1773 static void 1774 print_list(int fd, off_t out, const char *outfile, time_t ts) 1775 { 1776 static int first = 1; 1777 #ifndef SMALL 1778 static off_t in_tot, out_tot; 1779 uint32_t crc; 1780 #endif 1781 off_t in; 1782 int rv; 1783 1784 if (first) { 1785 #ifndef SMALL 1786 if (vflag) 1787 printf("method crc date time "); 1788 #endif 1789 if (qflag == 0) 1790 printf(" compressed uncompressed " 1791 "ratio uncompressed_name\n"); 1792 } 1793 first = 0; 1794 1795 /* print totals? */ 1796 #ifndef SMALL 1797 if (fd == -1) { 1798 in = in_tot; 1799 out = out_tot; 1800 } else 1801 #endif 1802 { 1803 /* read the last 4 bytes - this is the uncompressed size */ 1804 rv = lseek(fd, (off_t)(-8), SEEK_END); 1805 if (rv != -1) { 1806 unsigned char buf[8]; 1807 uint32_t usize; 1808 1809 if (read(fd, (char *)buf, sizeof(buf)) != sizeof(buf)) 1810 maybe_warn("read of uncompressed size"); 1811 usize = buf[4] | buf[5] << 8 | buf[6] << 16 | buf[7] << 24; 1812 in = (off_t)usize; 1813 #ifndef SMALL 1814 crc = buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24; 1815 #endif 1816 } 1817 } 1818 1819 #ifndef SMALL 1820 if (vflag && fd == -1) 1821 printf(" "); 1822 else if (vflag) { 1823 char *date = ctime(&ts); 1824 1825 /* skip the day, 1/100th second, and year */ 1826 date += 4; 1827 date[12] = 0; 1828 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 1829 } 1830 in_tot += in; 1831 out_tot += out; 1832 #endif 1833 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 1834 print_ratio(in, out, stdout); 1835 printf(" %s\n", outfile); 1836 } 1837 1838 /* display the usage of NetBSD gzip */ 1839 static void 1840 usage(void) 1841 { 1842 1843 fprintf(stderr, "%s\n", gzip_version); 1844 fprintf(stderr, 1845 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n" 1846 #ifndef SMALL 1847 " -c --stdout write to stdout, keep original files\n" 1848 " --to-stdout\n" 1849 " -d --decompress uncompress files\n" 1850 " --uncompress\n" 1851 " -f --force force overwriting & compress links\n" 1852 " -h --help display this help\n" 1853 " -n --no-name don't save original file name or time stamp\n" 1854 " -N --name save or restore original file name and time stamp\n" 1855 " -q --quiet output no warnings\n" 1856 " -r --recursive recursively compress files in directories\n" 1857 " -S .suf use suffix .suf instead of .gz\n" 1858 " --suffix .suf\n" 1859 " -t --test test compressed file\n" 1860 " -v --verbose print extra statistics\n" 1861 " -V --version display program version\n" 1862 " -1 --fast fastest (worst) compression\n" 1863 " -2 .. -8 set compression level\n" 1864 " -9 --best best (slowest) compression\n", 1865 #else 1866 , 1867 #endif 1868 getprogname()); 1869 exit(0); 1870 } 1871 1872 /* display the version of NetBSD gzip */ 1873 static void 1874 display_version(void) 1875 { 1876 1877 fprintf(stderr, "%s\n", gzip_version); 1878 exit(0); 1879 } 1880 1881 #ifndef NO_BZIP2_SUPPORT 1882 #include "unbzip2.c" 1883 #endif 1884 #ifndef NO_COMPRESS_SUPPORT 1885 #include "zuncompress.c" 1886 #endif 1887
Indexes created Tue Sep 23 21:09:50 GMT 2025