1 /* $NetBSD: gzip.c,v 1.67 2004/09/11 11:07:44 dsl Exp $ */ 2 /* $DragonFly: src/usr.bin/gzip/gzip.c,v 1.7 2007/12/06 19:54:52 hasso Exp $ */ 3 4 /* 5 * Copyright (c) 1997, 1998, 2003, 2004 Matthew R. Green 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * gzip.c -- GPL free gzip using zlib. 34 * 35 * RFC 1950 covers the zlib format 36 * RFC 1951 covers the deflate format 37 * RFC 1952 covers the gzip format 38 * 39 * TODO: 40 * - use mmap where possible 41 * - handle some signals better (remove outfile?) 42 * - make bzip2/compress -v/-t/-l support work as well as possible 43 */ 44 45 #include <sys/param.h> 46 #include <sys/stat.h> 47 #include <sys/time.h> 48 49 #include <err.h> 50 #include <errno.h> 51 #include <fcntl.h> 52 #include <fts.h> 53 #include <getopt.h> 54 #include <inttypes.h> 55 #include <libgen.h> 56 #include <stdarg.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <unistd.h> 61 #include <zlib.h> 62 63 #ifndef PRIdOFF 64 #define PRIdOFF PRId64 65 #endif 66 67 #ifndef PRId64 68 #define PRId64 "lld" 69 #endif 70 71 /* what type of file are we dealing with */ 72 enum filetype { 73 FT_GZIP, 74 #ifndef NO_BZIP2_SUPPORT 75 FT_BZIP2, 76 #endif 77 #ifndef NO_COMPRESS_SUPPORT 78 FT_Z, 79 #endif 80 FT_LAST, 81 FT_UNKNOWN 82 }; 83 84 #ifndef NO_BZIP2_SUPPORT 85 #include <bzlib.h> 86 87 #define BZ2_SUFFIX ".bz2" 88 #define BZIP2_MAGIC "\102\132\150" 89 #endif 90 91 #ifndef NO_COMPRESS_SUPPORT 92 #define Z_SUFFIX ".Z" 93 #define Z_MAGIC "\037\235" 94 #endif 95 96 #define GZ_SUFFIX ".gz" 97 98 #define BUFLEN (64 * 1024) 99 100 #define GZIP_MAGIC0 0x1F 101 #define GZIP_MAGIC1 0x8B 102 #define GZIP_OMAGIC1 0x9E 103 104 #define GZIP_TIMESTAMP (off_t)4 105 #define GZIP_ORIGNAME (off_t)10 106 107 #define HEAD_CRC 0x02 108 #define EXTRA_FIELD 0x04 109 #define ORIG_NAME 0x08 110 #define COMMENT 0x10 111 112 #define OS_CODE 3 /* Unix */ 113 114 typedef struct { 115 const char *zipped; 116 int ziplen; 117 const char *normal; /* for unzip - must not be longer than zipped */ 118 } suffixes_t; 119 static suffixes_t suffixes[] = { 120 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N} 121 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */ 122 #ifndef SMALL 123 SUFFIX(GZ_SUFFIX, ""), 124 SUFFIX(".z", ""), 125 SUFFIX("-gz", ""), 126 SUFFIX("-z", ""), 127 SUFFIX("_z", ""), 128 SUFFIX(".taz", ".tar"), 129 SUFFIX(".tgz", ".tar"), 130 #ifndef NO_BZIP2_SUPPORT 131 SUFFIX(BZ2_SUFFIX, ""), 132 #endif 133 #ifndef NO_COMPRESS_SUPPORT 134 SUFFIX(Z_SUFFIX, ""), 135 #endif 136 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */ 137 #endif /* SMALL */ 138 #undef SUFFIX 139 }; 140 #define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0]) 141 142 static const char gzip_version[] = "NetBSD gzip 20040830"; 143 144 static int cflag; /* stdout mode */ 145 static int dflag; /* decompress mode */ 146 static int lflag; /* list mode */ 147 static int numflag = 6; /* gzip -1..-9 value */ 148 149 #ifndef SMALL 150 static int fflag; /* force mode */ 151 static int kflag; /* don't delete input files */ 152 static int nflag; /* don't save name/timestamp */ 153 static int Nflag; /* don't restore name/timestamp */ 154 static int qflag; /* quiet mode */ 155 static int rflag; /* recursive mode */ 156 static int tflag; /* test */ 157 static int vflag; /* verbose mode */ 158 #else 159 #define qflag 0 160 #define tflag 0 161 #endif 162 163 static int exit_value = 0; /* exit value */ 164 165 static char *infile; /* name of file coming in */ 166 167 static void maybe_err(const char *fmt, ...) 168 __attribute__((__format__(__printf__, 1, 2))); 169 #ifndef NO_BZIP2_SUPPORT 170 static void maybe_errx(const char *fmt, ...) 171 __attribute__((__format__(__printf__, 1, 2))); 172 #endif 173 static void maybe_warn(const char *fmt, ...) 174 __attribute__((__format__(__printf__, 1, 2))); 175 static void maybe_warnx(const char *fmt, ...) 176 __attribute__((__format__(__printf__, 1, 2))); 177 static enum filetype file_gettype(u_char *); 178 #ifdef SMALL 179 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz) 180 #endif 181 static off_t gz_compress(int, int, off_t *, const char *, uint32_t); 182 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *); 183 static off_t file_compress(char *, char *, size_t); 184 static off_t file_uncompress(char *, char *, size_t); 185 static void handle_pathname(char *); 186 static void handle_file(char *, struct stat *); 187 static void handle_stdin(void); 188 static void handle_stdout(void); 189 static void print_ratio(off_t, off_t, FILE *); 190 static void print_list(int fd, off_t, const char *, time_t); 191 static void usage(void); 192 static void display_version(void); 193 static const suffixes_t *check_suffix(char *, int); 194 195 #ifdef SMALL 196 #define unlink_input(f, sb) unlink(f) 197 #else 198 static off_t cat_fd(unsigned char *, ssize_t, off_t *, int fd); 199 static void prepend_gzip(char *, int *, char ***); 200 static void handle_dir(char *); 201 static void print_verbage(const char *, const char *, off_t, off_t); 202 static void print_test(const char *, int); 203 static void copymodes(const char *, struct stat *); 204 static int check_outfile(const char *outfile, struct stat *sb); 205 #endif 206 207 #ifndef NO_BZIP2_SUPPORT 208 static off_t unbzip2(int, int, char *, size_t, off_t *); 209 #endif 210 211 #ifndef NO_COMPRESS_SUPPORT 212 static FILE *zdopen(int); 213 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *); 214 #endif 215 216 int main(int, char *p[]); 217 218 #ifdef SMALL 219 #define getopt_long(a,b,c,d,e) getopt(a,b,c) 220 #else 221 static const struct option longopts[] = { 222 { "stdout", no_argument, 0, 'c' }, 223 { "to-stdout", no_argument, 0, 'c' }, 224 { "decompress", no_argument, 0, 'd' }, 225 { "uncompress", no_argument, 0, 'd' }, 226 { "force", no_argument, 0, 'f' }, 227 { "help", no_argument, 0, 'h' }, 228 { "keep", no_argument, 0, 'k' }, 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 "cdfhHklnNqrS: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 'k': 310 kflag = 1; 311 break; 312 case 'n': 313 nflag = 1; 314 Nflag = 0; 315 break; 316 case 'N': 317 nflag = 0; 318 Nflag = 1; 319 break; 320 case 'q': 321 qflag = 1; 322 break; 323 case 'r': 324 rflag = 1; 325 break; 326 case 'S': 327 len = strlen(optarg); 328 if (len != 0) { 329 suffixes[0].zipped = optarg; 330 suffixes[0].ziplen = len; 331 } else { 332 suffixes[NUM_SUFFIXES - 1].zipped = ""; 333 suffixes[NUM_SUFFIXES - 1].ziplen = 0; 334 } 335 break; 336 case 't': 337 cflag = 1; 338 tflag = 1; 339 dflag = 1; 340 break; 341 case 'v': 342 vflag = 1; 343 break; 344 #endif 345 default: 346 usage(); 347 /* NOTREACHED */ 348 } 349 } 350 argv += optind; 351 argc -= optind; 352 353 if (argc == 0) { 354 if (dflag) /* stdin mode */ 355 handle_stdin(); 356 else /* stdout mode */ 357 handle_stdout(); 358 } else { 359 do { 360 handle_pathname(argv[0]); 361 } while (*++argv); 362 } 363 #ifndef SMALL 364 if (qflag == 0 && lflag && argc > 1) 365 print_list(-1, 0, "(totals)", 0); 366 #endif 367 exit(exit_value); 368 } 369 370 /* maybe print a warning */ 371 void 372 maybe_warn(const char *fmt, ...) 373 { 374 va_list ap; 375 376 if (qflag == 0) { 377 va_start(ap, fmt); 378 vwarn(fmt, ap); 379 va_end(ap); 380 } 381 if (exit_value == 0) 382 exit_value = 1; 383 } 384 385 /* ... without an errno. */ 386 void 387 maybe_warnx(const char *fmt, ...) 388 { 389 va_list ap; 390 391 if (qflag == 0) { 392 va_start(ap, fmt); 393 vwarnx(fmt, ap); 394 va_end(ap); 395 } 396 if (exit_value == 0) 397 exit_value = 1; 398 } 399 400 /* maybe print an error */ 401 void 402 maybe_err(const char *fmt, ...) 403 { 404 va_list ap; 405 406 if (qflag == 0) { 407 va_start(ap, fmt); 408 vwarn(fmt, ap); 409 va_end(ap); 410 } 411 exit(2); 412 } 413 414 #ifndef NO_BZIP2_SUPPORT 415 /* ... without an errno. */ 416 void 417 maybe_errx(const char *fmt, ...) 418 { 419 va_list ap; 420 421 if (qflag == 0) { 422 va_start(ap, fmt); 423 vwarnx(fmt, ap); 424 va_end(ap); 425 } 426 exit(2); 427 } 428 #endif 429 430 #ifndef SMALL 431 /* split up $GZIP and prepend it to the argument list */ 432 static void 433 prepend_gzip(char *gzip, int *argc, char ***argv) 434 { 435 char *s, **nargv, **ac; 436 int nenvarg = 0, i; 437 438 /* scan how many arguments there are */ 439 for (s = gzip;;) { 440 while (*s == ' ' || *s == '\t') 441 s++; 442 if (*s == 0) 443 goto count_done; 444 nenvarg++; 445 while (*s != ' ' && *s != '\t') 446 if (*s++ == 0) 447 goto count_done; 448 } 449 count_done: 450 /* punt early */ 451 if (nenvarg == 0) 452 return; 453 454 *argc += nenvarg; 455 ac = *argv; 456 457 nargv = (char **)malloc((*argc + 1) * sizeof(char *)); 458 if (nargv == NULL) 459 maybe_err("malloc"); 460 461 /* stash this away */ 462 *argv = nargv; 463 464 /* copy the program name first */ 465 i = 0; 466 nargv[i++] = *(ac++); 467 468 /* take a copy of $GZIP and add it to the array */ 469 s = strdup(gzip); 470 if (s == NULL) 471 maybe_err("strdup"); 472 for (;;) { 473 /* Skip whitespaces. */ 474 while (*s == ' ' || *s == '\t') 475 s++; 476 if (*s == 0) 477 goto copy_done; 478 nargv[i++] = s; 479 /* Find the end of this argument. */ 480 while (*s != ' ' && *s != '\t') 481 if (*s++ == 0) 482 /* Argument followed by NUL. */ 483 goto copy_done; 484 /* Terminate by overwriting ' ' or '\t' with NUL. */ 485 *s++ = 0; 486 } 487 copy_done: 488 489 /* copy the original arguments and a NULL */ 490 while (*ac) 491 nargv[i++] = *(ac++); 492 nargv[i] = NULL; 493 } 494 #endif 495 496 /* compress input to output. Return bytes read, -1 on error */ 497 static off_t 498 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime) 499 { 500 z_stream z; 501 char *outbufp, *inbufp; 502 off_t in_tot = 0, out_tot = 0; 503 ssize_t in_size; 504 int i, error; 505 uLong crc; 506 #ifdef SMALL 507 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0, 508 0, 0, 0, 0, 509 0, OS_CODE }; 510 #endif 511 512 outbufp = malloc(BUFLEN); 513 inbufp = malloc(BUFLEN); 514 if (outbufp == NULL || inbufp == NULL) { 515 maybe_err("malloc failed"); 516 goto out; 517 } 518 519 memset(&z, 0, sizeof z); 520 z.zalloc = Z_NULL; 521 z.zfree = Z_NULL; 522 z.opaque = 0; 523 524 #ifdef SMALL 525 memcpy(outbufp, header, sizeof header); 526 i = sizeof header; 527 #else 528 if (nflag != 0) { 529 mtime = 0; 530 origname = ""; 531 } 532 533 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s", 534 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 535 *origname ? ORIG_NAME : 0, 536 mtime & 0xff, 537 (mtime >> 8) & 0xff, 538 (mtime >> 16) & 0xff, 539 (mtime >> 24) & 0xff, 540 numflag == 1 ? 4 : numflag == 9 ? 2 : 0, 541 OS_CODE, origname); 542 if (i >= BUFLEN) 543 /* this need PATH_MAX > BUFLEN ... */ 544 maybe_err("snprintf"); 545 if (*origname) 546 i++; 547 #endif 548 549 z.next_out = outbufp + i; 550 z.avail_out = BUFLEN - i; 551 552 error = deflateInit2(&z, numflag, Z_DEFLATED, 553 -MAX_WBITS, 8, Z_DEFAULT_STRATEGY); 554 if (error != Z_OK) { 555 maybe_warnx("deflateInit2 failed"); 556 in_tot = -1; 557 goto out; 558 } 559 560 crc = crc32(0L, Z_NULL, 0); 561 for (;;) { 562 if (z.avail_out == 0) { 563 if (write(out, outbufp, BUFLEN) != BUFLEN) { 564 maybe_warn("write"); 565 in_tot = -1; 566 goto out; 567 } 568 569 out_tot += BUFLEN; 570 z.next_out = outbufp; 571 z.avail_out = BUFLEN; 572 } 573 574 if (z.avail_in == 0) { 575 in_size = read(in, inbufp, BUFLEN); 576 if (in_size < 0) { 577 maybe_warn("read"); 578 in_tot = -1; 579 goto out; 580 } 581 if (in_size == 0) 582 break; 583 584 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size); 585 in_tot += in_size; 586 z.next_in = inbufp; 587 z.avail_in = in_size; 588 } 589 590 error = deflate(&z, Z_NO_FLUSH); 591 if (error != Z_OK && error != Z_STREAM_END) { 592 maybe_warnx("deflate failed"); 593 in_tot = -1; 594 goto out; 595 } 596 } 597 598 /* clean up */ 599 for (;;) { 600 ssize_t len; 601 602 error = deflate(&z, Z_FINISH); 603 if (error != Z_OK && error != Z_STREAM_END) { 604 maybe_warnx("deflate failed"); 605 in_tot = -1; 606 goto out; 607 } 608 609 len = (char *)z.next_out - outbufp; 610 611 if (write(out, outbufp, len) != len) { 612 maybe_warn("write"); 613 out_tot = -1; 614 goto out; 615 } 616 out_tot += len; 617 z.next_out = outbufp; 618 z.avail_out = BUFLEN; 619 620 if (error == Z_STREAM_END) 621 break; 622 } 623 624 if (deflateEnd(&z) != Z_OK) { 625 maybe_warnx("deflateEnd failed"); 626 in_tot = -1; 627 goto out; 628 } 629 630 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c", 631 (int)crc & 0xff, 632 (int)(crc >> 8) & 0xff, 633 (int)(crc >> 16) & 0xff, 634 (int)(crc >> 24) & 0xff, 635 (int)in_tot & 0xff, 636 (int)(in_tot >> 8) & 0xff, 637 (int)(in_tot >> 16) & 0xff, 638 (int)(in_tot >> 24) & 0xff); 639 if (i != 8) 640 maybe_err("snprintf"); 641 if (write(out, outbufp, i) != i) { 642 maybe_warn("write"); 643 in_tot = -1; 644 } else 645 out_tot += i; 646 647 out: 648 if (inbufp != NULL) 649 free(inbufp); 650 if (outbufp != NULL) 651 free(outbufp); 652 if (gsizep) 653 *gsizep = out_tot; 654 return in_tot; 655 } 656 657 /* 658 * uncompress input to output then close the input. return the 659 * uncompressed size written, and put the compressed sized read 660 * into `*gsizep'. 661 */ 662 static off_t 663 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep, 664 const char *filename) 665 { 666 z_stream z; 667 char *outbufp, *inbufp; 668 off_t out_tot = prelen, in_tot = 0; 669 uint32_t out_sub_tot = 0; 670 enum { 671 GZSTATE_MAGIC0, 672 GZSTATE_MAGIC1, 673 GZSTATE_METHOD, 674 GZSTATE_FLAGS, 675 GZSTATE_SKIPPING, 676 GZSTATE_EXTRA, 677 GZSTATE_EXTRA2, 678 GZSTATE_EXTRA3, 679 GZSTATE_ORIGNAME, 680 GZSTATE_COMMENT, 681 GZSTATE_HEAD_CRC1, 682 GZSTATE_HEAD_CRC2, 683 GZSTATE_INIT, 684 GZSTATE_READ, 685 GZSTATE_CRC, 686 GZSTATE_LEN, 687 } state = GZSTATE_MAGIC0; 688 int flags = 0, skip_count = 0; 689 int error = 0, done_reading = 0; 690 uLong crc = 0; 691 ssize_t wr; 692 693 #define ADVANCE() { z.next_in++; z.avail_in--; } 694 695 if ((outbufp = malloc(BUFLEN)) == NULL) { 696 maybe_err("malloc failed"); 697 goto out2; 698 } 699 if ((inbufp = malloc(BUFLEN)) == NULL) { 700 maybe_err("malloc failed"); 701 goto out1; 702 } 703 704 memset(&z, 0, sizeof z); 705 z.avail_in = prelen; 706 z.next_in = pre; 707 z.avail_out = BUFLEN; 708 z.next_out = outbufp; 709 z.zalloc = NULL; 710 z.zfree = NULL; 711 z.opaque = 0; 712 713 714 for (;;) { 715 if (z.avail_in == 0 && done_reading == 0) { 716 ssize_t in_size = read(in, inbufp, BUFLEN); 717 718 if (in_size == -1) { 719 #ifndef SMALL 720 if (tflag && vflag) 721 print_test(filename, 0); 722 #endif 723 maybe_warn("failed to read stdin"); 724 out_tot = -1; 725 goto stop; 726 } else if (in_size == 0) 727 done_reading = 1; 728 729 z.avail_in = in_size; 730 z.next_in = inbufp; 731 732 in_tot += in_size; 733 } 734 if (z.avail_in == 0) { 735 if (done_reading && state != GZSTATE_MAGIC0) 736 maybe_warnx("%s: unexpected end of file", 737 filename); 738 goto stop; 739 } 740 switch (state) { 741 case GZSTATE_MAGIC0: 742 if (*z.next_in != GZIP_MAGIC0) { 743 maybe_warnx("input not gziped (MAGIC0)"); 744 out_tot = -1; 745 goto stop; 746 } 747 ADVANCE(); 748 state++; 749 out_sub_tot = 0; 750 crc = crc32(0L, Z_NULL, 0); 751 break; 752 753 case GZSTATE_MAGIC1: 754 if (*z.next_in != GZIP_MAGIC1 && 755 *z.next_in != GZIP_OMAGIC1) { 756 maybe_warnx("input not gziped (MAGIC1)"); 757 out_tot = -1; 758 goto stop; 759 } 760 ADVANCE(); 761 state++; 762 break; 763 764 case GZSTATE_METHOD: 765 if (*z.next_in != Z_DEFLATED) { 766 maybe_warnx("unknown compression method"); 767 out_tot = -1; 768 goto stop; 769 } 770 ADVANCE(); 771 state++; 772 break; 773 774 case GZSTATE_FLAGS: 775 flags = *z.next_in; 776 ADVANCE(); 777 skip_count = 6; 778 state++; 779 break; 780 781 case GZSTATE_SKIPPING: 782 if (skip_count > 0) { 783 skip_count--; 784 ADVANCE(); 785 } else 786 state++; 787 break; 788 789 case GZSTATE_EXTRA: 790 if ((flags & EXTRA_FIELD) == 0) { 791 state = GZSTATE_ORIGNAME; 792 break; 793 } 794 skip_count = *z.next_in; 795 ADVANCE(); 796 state++; 797 break; 798 799 case GZSTATE_EXTRA2: 800 skip_count |= ((*z.next_in) << 8); 801 ADVANCE(); 802 state++; 803 break; 804 805 case GZSTATE_EXTRA3: 806 if (skip_count > 0) { 807 skip_count--; 808 ADVANCE(); 809 } else 810 state++; 811 break; 812 813 case GZSTATE_ORIGNAME: 814 if ((flags & ORIG_NAME) == 0) { 815 state++; 816 break; 817 } 818 if (*z.next_in == 0) 819 state++; 820 ADVANCE(); 821 break; 822 823 case GZSTATE_COMMENT: 824 if ((flags & COMMENT) == 0) { 825 state++; 826 break; 827 } 828 if (*z.next_in == 0) 829 state++; 830 ADVANCE(); 831 break; 832 833 case GZSTATE_HEAD_CRC1: 834 if (flags & HEAD_CRC) 835 skip_count = 2; 836 else 837 skip_count = 0; 838 state++; 839 break; 840 841 case GZSTATE_HEAD_CRC2: 842 if (skip_count > 0) { 843 skip_count--; 844 ADVANCE(); 845 } else 846 state++; 847 break; 848 849 case GZSTATE_INIT: 850 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) { 851 maybe_warnx("failed to inflateInit"); 852 out_tot = -1; 853 goto stop; 854 } 855 state++; 856 break; 857 858 case GZSTATE_READ: 859 error = inflate(&z, Z_FINISH); 860 /* Z_BUF_ERROR goes with Z_FINISH... */ 861 if (error != Z_STREAM_END && error != Z_BUF_ERROR) 862 /* Just need more input */ 863 break; 864 wr = BUFLEN - z.avail_out; 865 866 if (wr != 0) { 867 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 868 if ( 869 #ifndef SMALL 870 /* don't write anything with -t */ 871 tflag == 0 && 872 #endif 873 write(out, outbufp, wr) != wr) { 874 maybe_warn("error writing to output"); 875 out_tot = -1; 876 goto stop; 877 } 878 879 out_tot += wr; 880 out_sub_tot += wr; 881 } 882 883 if (error == Z_STREAM_END) { 884 inflateEnd(&z); 885 state++; 886 } 887 888 z.next_out = outbufp; 889 z.avail_out = BUFLEN; 890 891 break; 892 case GZSTATE_CRC: 893 { 894 static int empty_buffer = 0; 895 uLong origcrc; 896 897 if (z.avail_in < 4) { 898 if (!done_reading && empty_buffer++ < 4) 899 continue; 900 maybe_warnx("truncated input"); 901 out_tot = -1; 902 goto stop; 903 } 904 empty_buffer = 0; 905 origcrc = ((unsigned)z.next_in[0] & 0xff) | 906 ((unsigned)z.next_in[1] & 0xff) << 8 | 907 ((unsigned)z.next_in[2] & 0xff) << 16 | 908 ((unsigned)z.next_in[3] & 0xff) << 24; 909 if (origcrc != crc) { 910 maybe_warnx("invalid compressed" 911 " data--crc error"); 912 out_tot = -1; 913 goto stop; 914 } 915 } 916 917 z.avail_in -= 4; 918 z.next_in += 4; 919 920 if (!z.avail_in) 921 goto stop; 922 state++; 923 break; 924 case GZSTATE_LEN: 925 { 926 static int empty_buffer = 0; 927 uLong origlen; 928 929 if (z.avail_in < 4) { 930 if (!done_reading && empty_buffer++ < 4) 931 continue; 932 maybe_warnx("truncated input"); 933 out_tot = -1; 934 goto stop; 935 } 936 empty_buffer = 0; 937 origlen = ((unsigned)z.next_in[0] & 0xff) | 938 ((unsigned)z.next_in[1] & 0xff) << 8 | 939 ((unsigned)z.next_in[2] & 0xff) << 16 | 940 ((unsigned)z.next_in[3] & 0xff) << 24; 941 942 if (origlen != out_sub_tot) { 943 maybe_warnx("invalid compressed" 944 " data--length error"); 945 out_tot = -1; 946 goto stop; 947 } 948 } 949 950 z.avail_in -= 4; 951 z.next_in += 4; 952 953 if (error < 0) { 954 maybe_warnx("decompression error"); 955 out_tot = -1; 956 goto stop; 957 } 958 state = GZSTATE_MAGIC0; 959 break; 960 } 961 continue; 962 stop: 963 break; 964 } 965 if (state > GZSTATE_INIT) 966 inflateEnd(&z); 967 968 #ifndef SMALL 969 if (tflag && vflag) 970 print_test(filename, out_tot != -1); 971 #endif 972 973 free(inbufp); 974 out1: 975 free(outbufp); 976 out2: 977 if (gsizep) 978 *gsizep = in_tot; 979 return (out_tot); 980 } 981 982 #ifndef SMALL 983 /* 984 * set the owner, mode, flags & utimes for a file 985 */ 986 static void 987 copymodes(const char *file, struct stat *sbp) 988 { 989 struct timeval times[2]; 990 991 /* 992 * If we have no info on the input, give this file some 993 * default values and return.. 994 */ 995 if (sbp == NULL) { 996 mode_t mask = umask(022); 997 998 (void)chmod(file, DEFFILEMODE & ~mask); 999 (void)umask(mask); 1000 return; 1001 } 1002 1003 /* if the chown fails, remove set-id bits as-per compress(1) */ 1004 if (chown(file, sbp->st_uid, sbp->st_gid) < 0) { 1005 if (errno != EPERM) 1006 maybe_warn("couldn't chown: %s", file); 1007 sbp->st_mode &= ~(S_ISUID|S_ISGID); 1008 } 1009 1010 /* we only allow set-id and the 9 normal permission bits */ 1011 sbp->st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1012 if (chmod(file, sbp->st_mode) < 0) 1013 maybe_warn("couldn't chmod: %s", file); 1014 1015 /* only try flags if they exist already */ 1016 if (sbp->st_flags != 0 && chflags(file, sbp->st_flags) < 0) 1017 maybe_warn("couldn't chflags: %s", file); 1018 1019 TIMESPEC_TO_TIMEVAL(×[0], &sbp->st_atimespec); 1020 TIMESPEC_TO_TIMEVAL(×[1], &sbp->st_mtimespec); 1021 if (utimes(file, times) < 0) 1022 maybe_warn("couldn't utimes: %s", file); 1023 } 1024 #endif 1025 1026 /* what sort of file is this? */ 1027 static enum filetype 1028 file_gettype(u_char *buf) 1029 { 1030 1031 if (buf[0] == GZIP_MAGIC0 && 1032 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1033 return FT_GZIP; 1034 else 1035 #ifndef NO_BZIP2_SUPPORT 1036 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1037 buf[3] >= '0' && buf[3] <= '9') 1038 return FT_BZIP2; 1039 else 1040 #endif 1041 #ifndef NO_COMPRESS_SUPPORT 1042 if (memcmp(buf, Z_MAGIC, 2) == 0) 1043 return FT_Z; 1044 else 1045 #endif 1046 return FT_UNKNOWN; 1047 } 1048 1049 #ifndef SMALL 1050 /* check the outfile is OK. */ 1051 static int 1052 check_outfile(const char *outfile, struct stat *sb) 1053 { 1054 int ok = 1; 1055 1056 if (lflag == 0 && stat(outfile, sb) == 0) { 1057 if (fflag) 1058 unlink(outfile); 1059 else if (isatty(STDIN_FILENO)) { 1060 char ans[10] = { 'n', '\0' }; /* default */ 1061 1062 fprintf(stderr, "%s already exists -- do you wish to " 1063 "overwrite (y or n)? " , outfile); 1064 (void)fgets(ans, sizeof(ans) - 1, stdin); 1065 if (ans[0] != 'y' && ans[0] != 'Y') { 1066 fprintf(stderr, "\tnot overwriting\n"); 1067 ok = 0; 1068 } else 1069 unlink(outfile); 1070 } else { 1071 maybe_warnx("%s already exists -- skipping", outfile); 1072 ok = 0; 1073 } 1074 } 1075 return ok; 1076 } 1077 1078 static void 1079 unlink_input(const char *file, struct stat *sb) 1080 { 1081 struct stat nsb; 1082 1083 if (kflag) 1084 return; 1085 1086 if (stat(file, &nsb) != 0) 1087 /* Must be gone alrady */ 1088 return; 1089 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1090 /* Definitely a different file */ 1091 return; 1092 unlink(file); 1093 } 1094 #endif 1095 1096 static const suffixes_t * 1097 check_suffix(char *file, int xlate) 1098 { 1099 const suffixes_t *s; 1100 int len = strlen(file); 1101 char *sp; 1102 1103 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1104 /* if it doesn't fit in "a.suf", don't bother */ 1105 if (s->ziplen >= len) 1106 continue; 1107 sp = file + len - s->ziplen; 1108 if (strcmp(s->zipped, sp) != 0) 1109 continue; 1110 if (xlate) 1111 strcpy(sp, s->normal); 1112 return s; 1113 } 1114 return NULL; 1115 } 1116 1117 /* 1118 * compress the given file: create a corresponding .gz file and remove the 1119 * original. 1120 */ 1121 static off_t 1122 file_compress(char *file, char *outfile, size_t outsize) 1123 { 1124 int in; 1125 int out; 1126 off_t size, insize; 1127 #ifndef SMALL 1128 struct stat isb, osb; 1129 const suffixes_t *suff; 1130 #endif 1131 1132 in = open(file, O_RDONLY); 1133 if (in == -1) { 1134 maybe_warn("can't open %s", file); 1135 return -1; 1136 } 1137 1138 if (cflag == 0) { 1139 #ifndef SMALL 1140 if (stat(file, &isb) == 0) { 1141 if (isb.st_nlink > 1 && fflag == 0) { 1142 maybe_warnx("%s has %d other link%s -- " 1143 "skipping", file, isb.st_nlink - 1, 1144 isb.st_nlink == 1 ? "" : "s"); 1145 close(in); 1146 return -1; 1147 } 1148 } 1149 1150 if (fflag == 0 && (suff = check_suffix(file, 0)) 1151 && suff->zipped[0] != 0) { 1152 maybe_warnx("%s already has %s suffix -- unchanged", 1153 file, suff->zipped); 1154 close(in); 1155 return -1; 1156 } 1157 #endif 1158 1159 /* Add (usually) .gz to filename */ 1160 if ((size_t)snprintf(outfile, outsize, "%s%s", 1161 file, suffixes[0].zipped) >= outsize) 1162 memcpy(outfile - suffixes[0].ziplen - 1, 1163 suffixes[0].zipped, suffixes[0].ziplen + 1); 1164 1165 #ifndef SMALL 1166 if (check_outfile(outfile, &osb) == 0) { 1167 close(in); 1168 return -1; 1169 } 1170 #endif 1171 } 1172 1173 if (cflag == 0) { 1174 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600); 1175 if (out == -1) { 1176 maybe_warn("could not create output: %s", outfile); 1177 fclose(stdin); 1178 return -1; 1179 } 1180 } else 1181 out = STDOUT_FILENO; 1182 1183 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1184 1185 (void)close(in); 1186 1187 /* 1188 * If there was an error, insize will be -1. 1189 * If we compressed to stdout, just return the size. 1190 * Otherwise stat the file and check it is the correct size. 1191 * We only blow away the file if we can stat the output and it 1192 * has the expected size. 1193 */ 1194 if (cflag != 0) 1195 return insize == -1 ? -1 : size; 1196 1197 if (close(out) == -1) 1198 maybe_warn("couldn't close ouput"); 1199 1200 #ifndef SMALL 1201 if (stat(outfile, &osb) < 0) { 1202 maybe_warn("couldn't stat: %s", outfile); 1203 goto bad_outfile; 1204 } 1205 1206 if (osb.st_size != size) { 1207 maybe_warnx("output file: %s wrong size (%" PRIdOFF 1208 " != %" PRIdOFF "), deleting", 1209 outfile, osb.st_size, size); 1210 goto bad_outfile; 1211 } 1212 1213 copymodes(outfile, &isb); 1214 #endif 1215 1216 /* output is good, ok to delete input */ 1217 unlink_input(file, &isb); 1218 return size; 1219 1220 #ifndef SMALL 1221 bad_outfile: 1222 maybe_warnx("leaving original %s", file); 1223 unlink(outfile); 1224 return size; 1225 #endif 1226 } 1227 1228 /* uncompress the given file and remove the original */ 1229 static off_t 1230 file_uncompress(char *file, char *outfile, size_t outsize) 1231 { 1232 struct stat isb, osb; 1233 off_t size; 1234 ssize_t rbytes; 1235 unsigned char header1[4]; 1236 enum filetype method; 1237 int fd, zfd = -1; 1238 #ifndef SMALL 1239 time_t timestamp = 0; 1240 unsigned char name[PATH_MAX + 1]; 1241 #endif 1242 1243 /* gather the old name info */ 1244 1245 fd = open(file, O_RDONLY); 1246 if (fd < 0) { 1247 maybe_warn("can't open %s", file); 1248 goto lose; 1249 } 1250 1251 strlcpy(outfile, file, outsize); 1252 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1253 maybe_warnx("%s: unknown suffix -- ignored", file); 1254 goto lose; 1255 } 1256 1257 rbytes = read(fd, header1, sizeof header1); 1258 if (rbytes != sizeof header1) { 1259 /* we don't want to fail here. */ 1260 #ifndef SMALL 1261 if (fflag) 1262 goto lose; 1263 #endif 1264 if (rbytes == -1) 1265 maybe_warn("can't read %s", file); 1266 else 1267 maybe_warnx("%s: unexpected end of file", file); 1268 goto lose; 1269 } 1270 1271 method = file_gettype(header1); 1272 1273 #ifndef SMALL 1274 if (fflag == 0 && method == FT_UNKNOWN) { 1275 maybe_warnx("%s: not in gzip format", file); 1276 goto lose; 1277 } 1278 1279 #endif 1280 1281 #ifndef SMALL 1282 if (method == FT_GZIP && Nflag) { 1283 unsigned char ts[4]; /* timestamp */ 1284 1285 if (pread(fd, ts, sizeof ts, GZIP_TIMESTAMP) != sizeof ts) { 1286 if (!fflag) 1287 maybe_warn("can't read %s", file); 1288 goto lose; 1289 } 1290 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0]; 1291 1292 if (header1[3] & ORIG_NAME) { 1293 rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME); 1294 if (rbytes < 0) { 1295 maybe_warn("can't read %s", file); 1296 goto lose; 1297 } 1298 if (name[0] != 0) { 1299 /* preserve original directory name */ 1300 char *dp = strrchr(file, '/'); 1301 if (dp == NULL) 1302 dp = file; 1303 else 1304 dp++; 1305 snprintf(outfile, outsize, "%.*s%.*s", 1306 (int) (dp - file), 1307 file, (int) rbytes, name); 1308 } 1309 } 1310 } 1311 #endif 1312 lseek(fd, 0, SEEK_SET); 1313 1314 if (cflag == 0 || lflag) { 1315 if (fstat(fd, &isb) != 0) 1316 goto lose; 1317 #ifndef SMALL 1318 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1319 maybe_warnx("%s has %d other links -- skipping", 1320 file, isb.st_nlink - 1); 1321 goto lose; 1322 } 1323 if (nflag == 0 && timestamp) 1324 isb.st_mtime = timestamp; 1325 if (check_outfile(outfile, &osb) == 0) 1326 goto lose; 1327 #endif 1328 } 1329 1330 if (cflag == 0 && lflag == 0) { 1331 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1332 if (zfd == STDOUT_FILENO) { 1333 /* We won't close STDOUT_FILENO later... */ 1334 zfd = dup(zfd); 1335 close(STDOUT_FILENO); 1336 } 1337 if (zfd == -1) { 1338 maybe_warn("can't open %s", outfile); 1339 goto lose; 1340 } 1341 } else 1342 zfd = STDOUT_FILENO; 1343 1344 #ifndef NO_BZIP2_SUPPORT 1345 if (method == FT_BZIP2) { 1346 1347 /* XXX */ 1348 if (lflag) { 1349 maybe_warnx("no -l with bzip2 files"); 1350 goto lose; 1351 } 1352 1353 size = unbzip2(fd, zfd, NULL, 0, NULL); 1354 } else 1355 #endif 1356 1357 #ifndef NO_COMPRESS_SUPPORT 1358 if (method == FT_Z) { 1359 FILE *in, *out; 1360 1361 /* XXX */ 1362 if (lflag) { 1363 maybe_warnx("no -l with Lempel-Ziv files"); 1364 goto lose; 1365 } 1366 1367 if ((in = zdopen(fd)) == NULL) { 1368 maybe_warn("zdopen for read: %s", file); 1369 goto lose; 1370 } 1371 1372 out = fdopen(dup(zfd), "w"); 1373 if (out == NULL) { 1374 maybe_warn("fdopen for write: %s", outfile); 1375 fclose(in); 1376 goto lose; 1377 } 1378 1379 size = zuncompress(in, out, NULL, 0, NULL); 1380 /* need to fclose() if ferror() is true... */ 1381 if (ferror(in) | fclose(in)) { 1382 maybe_warn("failed infile fclose"); 1383 unlink(outfile); 1384 (void)fclose(out); 1385 } 1386 if (fclose(out) != 0) { 1387 maybe_warn("failed outfile fclose"); 1388 unlink(outfile); 1389 goto lose; 1390 } 1391 } else 1392 #endif 1393 1394 #ifndef SMALL 1395 if (method == FT_UNKNOWN) { 1396 if (lflag) { 1397 maybe_warnx("no -l for unknown filetypes"); 1398 goto lose; 1399 } 1400 size = cat_fd(NULL, 0, NULL, fd); 1401 } else 1402 #endif 1403 { 1404 if (lflag) { 1405 print_list(fd, isb.st_size, outfile, isb.st_mtime); 1406 close(fd); 1407 return -1; /* XXX */ 1408 } 1409 1410 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1411 } 1412 1413 if (close(fd) != 0) 1414 maybe_warn("couldn't close input"); 1415 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1416 maybe_warn("couldn't close output"); 1417 1418 if (size == -1) { 1419 if (cflag == 0) 1420 unlink(outfile); 1421 maybe_warnx("%s: uncompress failed", file); 1422 return -1; 1423 } 1424 1425 /* if testing, or we uncompressed to stdout, this is all we need */ 1426 #ifndef SMALL 1427 if (tflag) 1428 return size; 1429 #endif 1430 /* if we are uncompressing to stdin, don't remove the file. */ 1431 if (cflag) 1432 return size; 1433 1434 /* 1435 * if we create a file... 1436 */ 1437 /* 1438 * if we can't stat the file don't remove the file. 1439 */ 1440 if (stat(outfile, &osb) < 0) { 1441 maybe_warn("couldn't stat (leaving original): %s", 1442 outfile); 1443 return -1; 1444 } 1445 if (osb.st_size != size) { 1446 maybe_warn("stat gave different size: %" PRIdOFF 1447 " != %" PRIdOFF " (leaving original)", 1448 size, osb.st_size); 1449 unlink(outfile); 1450 return -1; 1451 } 1452 unlink_input(file, &isb); 1453 #ifndef SMALL 1454 copymodes(outfile, &isb); 1455 #endif 1456 return size; 1457 1458 lose: 1459 if (fd != -1) 1460 close(fd); 1461 if (zfd != -1 && zfd != STDOUT_FILENO) 1462 close(fd); 1463 return -1; 1464 } 1465 1466 #ifndef SMALL 1467 static off_t 1468 cat_fd(unsigned char * prepend, ssize_t count, off_t *gsizep, int fd) 1469 { 1470 char buf[BUFLEN]; 1471 ssize_t rv; 1472 off_t in_tot; 1473 1474 in_tot = count; 1475 if (write(STDOUT_FILENO, prepend, count) != count) { 1476 maybe_warn("write to stdout"); 1477 return -1; 1478 } 1479 for (;;) { 1480 rv = read(fd, buf, sizeof buf); 1481 if (rv == 0) 1482 break; 1483 if (rv < 0) { 1484 maybe_warn("read from fd %d", fd); 1485 break; 1486 } 1487 1488 if (write(STDOUT_FILENO, buf, rv) != rv) { 1489 maybe_warn("write to stdout"); 1490 break; 1491 } 1492 in_tot += rv; 1493 } 1494 1495 if (gsizep) 1496 *gsizep = in_tot; 1497 return (in_tot); 1498 } 1499 #endif 1500 1501 static void 1502 handle_stdin(void) 1503 { 1504 unsigned char header1[4]; 1505 off_t usize, gsize; 1506 enum filetype method; 1507 #ifndef NO_COMPRESS_SUPPORT 1508 FILE *in; 1509 #endif 1510 1511 #ifndef SMALL 1512 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1513 maybe_warnx("standard input is a terminal -- ignoring"); 1514 return; 1515 } 1516 #endif 1517 1518 if (lflag) { 1519 struct stat isb; 1520 1521 /* XXX could read the whole file, etc. */ 1522 if (fstat(STDIN_FILENO, &isb) < 0) { 1523 maybe_warn("fstat"); 1524 return; 1525 } 1526 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime); 1527 return; 1528 } 1529 1530 if (read(STDIN_FILENO, header1, sizeof header1) != sizeof header1) { 1531 maybe_warn("can't read stdin"); 1532 return; 1533 } 1534 1535 method = file_gettype(header1); 1536 switch (method) { 1537 default: 1538 #ifndef SMALL 1539 if (fflag == 0) { 1540 maybe_warnx("unknown compression format"); 1541 return; 1542 } 1543 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO); 1544 break; 1545 #endif 1546 case FT_GZIP: 1547 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1548 header1, sizeof header1, &gsize, "(stdin)"); 1549 break; 1550 #ifndef NO_BZIP2_SUPPORT 1551 case FT_BZIP2: 1552 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1553 header1, sizeof header1, &gsize); 1554 break; 1555 #endif 1556 #ifndef NO_COMPRESS_SUPPORT 1557 case FT_Z: 1558 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1559 maybe_warnx("zopen of stdin"); 1560 return; 1561 } 1562 1563 usize = zuncompress(in, stdout, header1, sizeof header1, &gsize); 1564 fclose(in); 1565 break; 1566 #endif 1567 } 1568 1569 #ifndef SMALL 1570 if (vflag && !tflag && usize != -1 && gsize != -1) 1571 print_verbage(NULL, NULL, usize, gsize); 1572 #endif 1573 1574 } 1575 1576 static void 1577 handle_stdout(void) 1578 { 1579 off_t gsize, usize; 1580 1581 #ifndef SMALL 1582 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1583 maybe_warnx("standard output is a terminal -- ignoring"); 1584 return; 1585 } 1586 #endif 1587 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", 0); 1588 1589 #ifndef SMALL 1590 if (vflag && !tflag && usize != -1 && gsize != -1) 1591 print_verbage(NULL, NULL, usize, gsize); 1592 #endif 1593 } 1594 1595 /* do what is asked for, for the path name */ 1596 static void 1597 handle_pathname(char *path) 1598 { 1599 char *opath = path, *s = NULL; 1600 ssize_t len; 1601 int slen; 1602 struct stat sb; 1603 1604 /* check for stdout/stdin */ 1605 if (path[0] == '-' && path[1] == '\0') { 1606 if (dflag) 1607 handle_stdin(); 1608 else 1609 handle_stdout(); 1610 return; 1611 } 1612 1613 retry: 1614 if (stat(path, &sb) < 0) { 1615 /* lets try <path>.gz if we're decompressing */ 1616 if (dflag && s == NULL && errno == ENOENT) { 1617 len = strlen(path); 1618 slen = suffixes[0].ziplen; 1619 s = malloc(len + slen + 1); 1620 if (s == NULL) 1621 maybe_err("malloc"); 1622 memcpy(s, path, len); 1623 memcpy(s + len, suffixes[0].zipped, slen + 1); 1624 path = s; 1625 goto retry; 1626 } 1627 maybe_warn("can't stat: %s", opath); 1628 goto out; 1629 } 1630 1631 if (S_ISDIR(sb.st_mode)) { 1632 #ifndef SMALL 1633 if (rflag) 1634 handle_dir(path); 1635 else 1636 #endif 1637 maybe_warnx("%s is a directory", path); 1638 goto out; 1639 } 1640 1641 if (S_ISREG(sb.st_mode)) 1642 handle_file(path, &sb); 1643 else 1644 maybe_warnx("%s is not a regular file", path); 1645 1646 out: 1647 if (s) 1648 free(s); 1649 } 1650 1651 /* compress/decompress a file */ 1652 static void 1653 handle_file(char *file, struct stat *sbp) 1654 { 1655 off_t usize, gsize; 1656 char outfile[PATH_MAX]; 1657 1658 infile = file; 1659 if (dflag) { 1660 usize = file_uncompress(file, outfile, sizeof(outfile)); 1661 if (usize == -1) 1662 return; 1663 gsize = sbp->st_size; 1664 } else { 1665 gsize = file_compress(file, outfile, sizeof(outfile)); 1666 if (gsize == -1) 1667 return; 1668 usize = sbp->st_size; 1669 } 1670 1671 1672 #ifndef SMALL 1673 if (vflag && !tflag) 1674 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 1675 #endif 1676 } 1677 1678 #ifndef SMALL 1679 /* this is used with -r to recursively descend directories */ 1680 static void 1681 handle_dir(char *dir) 1682 { 1683 char *path_argv[2]; 1684 FTS *fts; 1685 FTSENT *entry; 1686 1687 path_argv[0] = dir; 1688 path_argv[1] = 0; 1689 fts = fts_open(path_argv, FTS_PHYSICAL | FTS_NOCHDIR, NULL); 1690 if (fts == NULL) { 1691 warn("couldn't fts_open %s", dir); 1692 return; 1693 } 1694 1695 while ((entry = fts_read(fts))) { 1696 switch(entry->fts_info) { 1697 case FTS_D: 1698 case FTS_DP: 1699 continue; 1700 1701 case FTS_DNR: 1702 case FTS_ERR: 1703 case FTS_NS: 1704 maybe_warn("%s", entry->fts_path); 1705 continue; 1706 case FTS_F: 1707 handle_file(entry->fts_path, entry->fts_statp); 1708 } 1709 } 1710 (void)fts_close(fts); 1711 } 1712 #endif 1713 1714 /* print a ratio - size reduction as a fraction of uncompressed size */ 1715 static void 1716 print_ratio(off_t in, off_t out, FILE *where) 1717 { 1718 int percent10; /* 10 * percent */ 1719 off_t diff; 1720 char buff[8]; 1721 int len; 1722 1723 diff = in - out/2; 1724 if (diff <= 0) 1725 /* 1726 * Output is more than double size of input! print -99.9% 1727 * Quite possibly we've failed to get the original size. 1728 */ 1729 percent10 = -999; 1730 else { 1731 /* 1732 * We only need 12 bits of result from the final division, 1733 * so reduce the values until a 32bit division will suffice. 1734 */ 1735 while (in > 0x100000) { 1736 diff >>= 1; 1737 in >>= 1; 1738 } 1739 if (in != 0) 1740 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 1741 else 1742 percent10 = 0; 1743 } 1744 1745 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 1746 /* Move the '.' to before the last digit */ 1747 buff[len - 1] = buff[len - 2]; 1748 buff[len - 2] = '.'; 1749 fprintf(where, "%5s%%", buff); 1750 } 1751 1752 #ifndef SMALL 1753 /* print compression statistics, and the new name (if there is one!) */ 1754 static void 1755 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 1756 { 1757 if (file) 1758 fprintf(stderr, "%s:%s ", file, 1759 strlen(file) < 7 ? "\t\t" : "\t"); 1760 print_ratio(usize, gsize, stderr); 1761 if (nfile) 1762 fprintf(stderr, " -- replaced with %s", nfile); 1763 fprintf(stderr, "\n"); 1764 fflush(stderr); 1765 } 1766 1767 /* print test results */ 1768 static void 1769 print_test(const char *file, int ok) 1770 { 1771 1772 if (exit_value == 0 && ok == 0) 1773 exit_value = 1; 1774 fprintf(stderr, "%s:%s %s\n", file, 1775 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 1776 fflush(stderr); 1777 } 1778 #endif 1779 1780 /* print a file's info ala --list */ 1781 /* eg: 1782 compressed uncompressed ratio uncompressed_name 1783 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 1784 */ 1785 static void 1786 print_list(int fd, off_t out, const char *outfile, time_t ts) 1787 { 1788 static int first = 1; 1789 #ifndef SMALL 1790 static off_t in_tot, out_tot; 1791 uint32_t crc = 0; 1792 #endif 1793 off_t in = 0; 1794 int rv; 1795 1796 if (first) { 1797 #ifndef SMALL 1798 if (vflag) 1799 printf("method crc date time "); 1800 #endif 1801 if (qflag == 0) 1802 printf(" compressed uncompressed " 1803 "ratio uncompressed_name\n"); 1804 } 1805 first = 0; 1806 1807 /* print totals? */ 1808 #ifndef SMALL 1809 if (fd == -1) { 1810 in = in_tot; 1811 out = out_tot; 1812 } else 1813 #endif 1814 { 1815 /* read the last 4 bytes - this is the uncompressed size */ 1816 rv = lseek(fd, (off_t)(-8), SEEK_END); 1817 if (rv != -1) { 1818 unsigned char buf[8]; 1819 uint32_t usize; 1820 1821 if (read(fd, (char *)buf, sizeof(buf)) != sizeof(buf)) 1822 maybe_warn("read of uncompressed size"); 1823 usize = buf[4] | buf[5] << 8 | buf[6] << 16 | buf[7] << 24; 1824 in = (off_t)usize; 1825 #ifndef SMALL 1826 crc = buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24; 1827 #endif 1828 } 1829 } 1830 1831 #ifndef SMALL 1832 if (vflag && fd == -1) 1833 printf(" "); 1834 else if (vflag) { 1835 char *date = ctime(&ts); 1836 1837 /* skip the day, 1/100th second, and year */ 1838 date += 4; 1839 date[12] = 0; 1840 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 1841 } 1842 in_tot += in; 1843 out_tot += out; 1844 #endif 1845 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 1846 print_ratio(in, out, stdout); 1847 printf(" %s\n", outfile); 1848 } 1849 1850 /* display the usage of NetBSD gzip */ 1851 static void 1852 usage(void) 1853 { 1854 1855 fprintf(stderr, "%s\n", gzip_version); 1856 fprintf(stderr, 1857 #ifdef SMALL 1858 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n", 1859 #else 1860 "usage: %s [-123456789acdfhklLNnqrtVv] [-S .suffix] [<file> [<file> ...]]\n" 1861 " -c --stdout write to stdout, keep original files\n" 1862 " --to-stdout\n" 1863 " -d --decompress uncompress files\n" 1864 " --uncompress\n" 1865 " -f --force force overwriting & compress links\n" 1866 " -h --help display this help\n" 1867 " -k --keep don't delete input files during operation\n" 1868 " -n --no-name don't save original file name or time stamp\n" 1869 " -N --name save or restore original file name and time stamp\n" 1870 " -q --quiet output no warnings\n" 1871 " -r --recursive recursively compress files in directories\n" 1872 " -S .suf use suffix .suf instead of .gz\n" 1873 " --suffix .suf\n" 1874 " -t --test test compressed file\n" 1875 " -v --verbose print extra statistics\n" 1876 " -V --version display program version\n" 1877 " -1 --fast fastest (worst) compression\n" 1878 " -2 .. -8 set compression level\n" 1879 " -9 --best best (slowest) compression\n", 1880 #endif 1881 getprogname()); 1882 exit(0); 1883 } 1884 1885 /* display the version of NetBSD gzip */ 1886 static void 1887 display_version(void) 1888 { 1889 1890 fprintf(stderr, "%s\n", gzip_version); 1891 exit(0); 1892 } 1893 1894 #ifndef NO_BZIP2_SUPPORT 1895 #include "unbzip2.c" 1896 #endif 1897 #ifndef NO_COMPRESS_SUPPORT 1898 #include "zuncompress.c" 1899 #endif 1900