1 /* $NetBSD: gzip.c,v 1.94 2009/04/12 10:31:14 lukem 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, 2006 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 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 /* 31 * gzip.c -- GPL free gzip using zlib. 32 * 33 * RFC 1950 covers the zlib format 34 * RFC 1951 covers the deflate format 35 * RFC 1952 covers the gzip format 36 * 37 * TODO: 38 * - use mmap where possible 39 * - handle some signals better (remove outfile?) 40 * - make bzip2/compress -v/-t/-l support work as well as possible 41 */ 42 43 #include <sys/param.h> 44 #include <sys/stat.h> 45 #include <sys/time.h> 46 47 #include <err.h> 48 #include <errno.h> 49 #include <fcntl.h> 50 #include <fts.h> 51 #include <getopt.h> 52 #include <inttypes.h> 53 #include <libgen.h> 54 #include <stdarg.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <time.h> 59 #include <unistd.h> 60 #include <zlib.h> 61 62 #ifndef PRIdOFF 63 #define PRIdOFF PRId64 64 #endif 65 66 #ifndef PRId64 67 #define PRId64 "lld" 68 #endif 69 70 /* what type of file are we dealing with */ 71 enum filetype { 72 FT_GZIP, 73 #ifndef NO_BZIP2_SUPPORT 74 FT_BZIP2, 75 #endif 76 #ifndef NO_COMPRESS_SUPPORT 77 FT_Z, 78 #endif 79 #ifndef NO_PACK_SUPPORT 80 FT_PACK, 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 #ifndef NO_PACK_SUPPORT 99 #define PACK_MAGIC "\037\036" 100 #endif 101 102 #define GZ_SUFFIX ".gz" 103 104 #define BUFLEN (64 * 1024) 105 106 #define GZIP_MAGIC0 0x1F 107 #define GZIP_MAGIC1 0x8B 108 #define GZIP_OMAGIC1 0x9E 109 110 #define GZIP_TIMESTAMP (off_t)4 111 #define GZIP_ORIGNAME (off_t)10 112 113 #define HEAD_CRC 0x02 114 #define EXTRA_FIELD 0x04 115 #define ORIG_NAME 0x08 116 #define COMMENT 0x10 117 118 #define OS_CODE 3 /* Unix */ 119 120 typedef struct { 121 const char *zipped; 122 int ziplen; 123 const char *normal; /* for unzip - must not be longer than zipped */ 124 } suffixes_t; 125 static suffixes_t suffixes[] = { 126 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N} 127 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */ 128 #ifndef SMALL 129 SUFFIX(GZ_SUFFIX, ""), 130 SUFFIX(".z", ""), 131 SUFFIX("-gz", ""), 132 SUFFIX("-z", ""), 133 SUFFIX("_z", ""), 134 SUFFIX(".taz", ".tar"), 135 SUFFIX(".tgz", ".tar"), 136 #ifndef NO_BZIP2_SUPPORT 137 SUFFIX(BZ2_SUFFIX, ""), 138 #endif 139 #ifndef NO_COMPRESS_SUPPORT 140 SUFFIX(Z_SUFFIX, ""), 141 #endif 142 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */ 143 #endif /* SMALL */ 144 #undef SUFFIX 145 }; 146 #define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0]) 147 148 #define SUFFIX_MAXLEN 30 149 150 static const char gzip_version[] = "NetBSD gzip 20060927"; 151 152 static int cflag; /* stdout mode */ 153 static int dflag; /* decompress mode */ 154 static int lflag; /* list mode */ 155 static int numflag = 6; /* gzip -1..-9 value */ 156 157 #ifndef SMALL 158 static int fflag; /* force mode */ 159 static int kflag; /* don't delete input files */ 160 static int nflag; /* don't save name/timestamp */ 161 static int Nflag; /* don't restore name/timestamp */ 162 static int qflag; /* quiet mode */ 163 static int rflag; /* recursive mode */ 164 static int tflag; /* test */ 165 static int vflag; /* verbose mode */ 166 #else 167 #define qflag 0 168 #define tflag 0 169 #endif 170 171 static int exit_value = 0; /* exit value */ 172 173 static char *infile; /* name of file coming in */ 174 175 static void maybe_err(const char *fmt, ...) 176 __attribute__((__format__(__printf__, 1, 2))); 177 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) 178 static void maybe_errx(const char *fmt, ...) 179 __attribute__((__format__(__printf__, 1, 2))); 180 #endif 181 static void maybe_warn(const char *fmt, ...) 182 __attribute__((__format__(__printf__, 1, 2))); 183 static void maybe_warnx(const char *fmt, ...) 184 __attribute__((__format__(__printf__, 1, 2))); 185 static enum filetype file_gettype(u_char *); 186 #ifdef SMALL 187 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz) 188 #endif 189 static off_t gz_compress(int, int, off_t *, const char *, uint32_t); 190 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *); 191 static off_t file_compress(char *, char *, size_t); 192 static off_t file_uncompress(char *, char *, size_t); 193 static void handle_pathname(char *); 194 static void handle_file(char *, struct stat *); 195 static void handle_stdin(void); 196 static void handle_stdout(void); 197 static void print_ratio(off_t, off_t, FILE *); 198 static void print_list(int fd, off_t, const char *, time_t); 199 static void usage(void); 200 static void display_version(void); 201 static const suffixes_t *check_suffix(char *, int); 202 static ssize_t read_retry(int, void *, size_t); 203 204 #ifdef SMALL 205 #define unlink_input(f, sb) unlink(f) 206 #else 207 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd); 208 static void prepend_gzip(char *, int *, char ***); 209 static void handle_dir(char *); 210 static void print_verbage(const char *, const char *, off_t, off_t); 211 static void print_test(const char *, int); 212 static void copymodes(int fd, const struct stat *, const char *file); 213 static int check_outfile(const char *outfile); 214 #endif 215 216 #ifndef NO_BZIP2_SUPPORT 217 static off_t unbzip2(int, int, char *, size_t, off_t *); 218 #endif 219 220 #ifndef NO_COMPRESS_SUPPORT 221 static FILE *zdopen(int); 222 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *); 223 #endif 224 225 #ifndef NO_PACK_SUPPORT 226 static off_t unpack(int, int, char *, size_t, off_t *); 227 #endif 228 229 int main(int, char *p[]); 230 231 #ifdef SMALL 232 #define getopt_long(a,b,c,d,e) getopt(a,b,c) 233 #else 234 static const struct option longopts[] = { 235 { "stdout", no_argument, 0, 'c' }, 236 { "to-stdout", no_argument, 0, 'c' }, 237 { "decompress", no_argument, 0, 'd' }, 238 { "uncompress", no_argument, 0, 'd' }, 239 { "force", no_argument, 0, 'f' }, 240 { "help", no_argument, 0, 'h' }, 241 { "keep", no_argument, 0, 'k' }, 242 { "list", no_argument, 0, 'l' }, 243 { "no-name", no_argument, 0, 'n' }, 244 { "name", no_argument, 0, 'N' }, 245 { "quiet", no_argument, 0, 'q' }, 246 { "recursive", no_argument, 0, 'r' }, 247 { "suffix", required_argument, 0, 'S' }, 248 { "test", no_argument, 0, 't' }, 249 { "verbose", no_argument, 0, 'v' }, 250 { "version", no_argument, 0, 'V' }, 251 { "fast", no_argument, 0, '1' }, 252 { "best", no_argument, 0, '9' }, 253 #if 0 254 /* 255 * This is what else GNU gzip implements. --ascii isn't useful 256 * on NetBSD, and I don't care to have a --license. 257 */ 258 { "ascii", no_argument, 0, 'a' }, 259 { "license", no_argument, 0, 'L' }, 260 #endif 261 { NULL, no_argument, 0, 0 }, 262 }; 263 #endif 264 265 int 266 main(int argc, char **argv) 267 { 268 const char *progname = getprogname(); 269 #ifndef SMALL 270 char *gzip; 271 int len; 272 #endif 273 int ch; 274 275 /* XXX set up signals */ 276 277 #ifndef SMALL 278 if ((gzip = getenv("GZIP")) != NULL) 279 prepend_gzip(gzip, &argc, &argv); 280 #endif 281 282 /* 283 * XXX 284 * handle being called `gunzip', `zcat' and `gzcat' 285 */ 286 if (strcmp(progname, "gunzip") == 0) 287 dflag = 1; 288 else if (strcmp(progname, "zcat") == 0 || 289 strcmp(progname, "gzcat") == 0) 290 dflag = cflag = 1; 291 292 #ifdef SMALL 293 #define OPT_LIST "123456789cdhltV" 294 #else 295 #define OPT_LIST "123456789cdfhklNnqrS:tVv" 296 #endif 297 298 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) { 299 switch (ch) { 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 case 'c': 306 cflag = 1; 307 break; 308 case 'd': 309 dflag = 1; 310 break; 311 case 'l': 312 lflag = 1; 313 dflag = 1; 314 break; 315 case 'V': 316 display_version(); 317 /* NOTREACHED */ 318 #ifndef SMALL 319 case 'f': 320 fflag = 1; 321 break; 322 case 'k': 323 kflag = 1; 324 break; 325 case 'N': 326 nflag = 0; 327 Nflag = 1; 328 break; 329 case 'n': 330 nflag = 1; 331 Nflag = 0; 332 break; 333 case 'q': 334 qflag = 1; 335 break; 336 case 'r': 337 rflag = 1; 338 break; 339 case 'S': 340 len = strlen(optarg); 341 if (len != 0) { 342 if (len >= SUFFIX_MAXLEN) 343 errx(1, "incorrect suffix: '%s'", optarg); 344 suffixes[0].zipped = optarg; 345 suffixes[0].ziplen = len; 346 } else { 347 suffixes[NUM_SUFFIXES - 1].zipped = ""; 348 suffixes[NUM_SUFFIXES - 1].ziplen = 0; 349 } 350 break; 351 case 't': 352 cflag = 1; 353 tflag = 1; 354 dflag = 1; 355 break; 356 case 'v': 357 vflag = 1; 358 break; 359 #endif 360 default: 361 usage(); 362 /* NOTREACHED */ 363 } 364 } 365 argv += optind; 366 argc -= optind; 367 368 if (argc == 0) { 369 if (dflag) /* stdin mode */ 370 handle_stdin(); 371 else /* stdout mode */ 372 handle_stdout(); 373 } else { 374 do { 375 handle_pathname(argv[0]); 376 } while (*++argv); 377 } 378 #ifndef SMALL 379 if (qflag == 0 && lflag && argc > 1) 380 print_list(-1, 0, "(totals)", 0); 381 #endif 382 exit(exit_value); 383 } 384 385 /* maybe print a warning */ 386 void 387 maybe_warn(const char *fmt, ...) 388 { 389 va_list ap; 390 391 if (qflag == 0) { 392 va_start(ap, fmt); 393 vwarn(fmt, ap); 394 va_end(ap); 395 } 396 if (exit_value == 0) 397 exit_value = 1; 398 } 399 400 /* ... without an errno. */ 401 void 402 maybe_warnx(const char *fmt, ...) 403 { 404 va_list ap; 405 406 if (qflag == 0) { 407 va_start(ap, fmt); 408 vwarnx(fmt, ap); 409 va_end(ap); 410 } 411 if (exit_value == 0) 412 exit_value = 1; 413 } 414 415 /* maybe print an error */ 416 void 417 maybe_err(const char *fmt, ...) 418 { 419 va_list ap; 420 421 if (qflag == 0) { 422 va_start(ap, fmt); 423 vwarn(fmt, ap); 424 va_end(ap); 425 } 426 exit(2); 427 } 428 429 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) 430 /* ... without an errno. */ 431 void 432 maybe_errx(const char *fmt, ...) 433 { 434 va_list ap; 435 436 if (qflag == 0) { 437 va_start(ap, fmt); 438 vwarnx(fmt, ap); 439 va_end(ap); 440 } 441 exit(2); 442 } 443 #endif 444 445 #ifndef SMALL 446 /* split up $GZIP and prepend it to the argument list */ 447 static void 448 prepend_gzip(char *gzip, int *argc, char ***argv) 449 { 450 char *s, **nargv, **ac; 451 int nenvarg = 0, i; 452 453 /* scan how many arguments there are */ 454 for (s = gzip;;) { 455 while (*s == ' ' || *s == '\t') 456 s++; 457 if (*s == 0) 458 goto count_done; 459 nenvarg++; 460 while (*s != ' ' && *s != '\t') 461 if (*s++ == 0) 462 goto count_done; 463 } 464 count_done: 465 /* punt early */ 466 if (nenvarg == 0) 467 return; 468 469 *argc += nenvarg; 470 ac = *argv; 471 472 nargv = (char **)malloc((*argc + 1) * sizeof(char *)); 473 if (nargv == NULL) 474 maybe_err("malloc"); 475 476 /* stash this away */ 477 *argv = nargv; 478 479 /* copy the program name first */ 480 i = 0; 481 nargv[i++] = *(ac++); 482 483 /* take a copy of $GZIP and add it to the array */ 484 s = strdup(gzip); 485 if (s == NULL) 486 maybe_err("strdup"); 487 for (;;) { 488 /* Skip whitespaces. */ 489 while (*s == ' ' || *s == '\t') 490 s++; 491 if (*s == 0) 492 goto copy_done; 493 nargv[i++] = s; 494 /* Find the end of this argument. */ 495 while (*s != ' ' && *s != '\t') 496 if (*s++ == 0) 497 /* Argument followed by NUL. */ 498 goto copy_done; 499 /* Terminate by overwriting ' ' or '\t' with NUL. */ 500 *s++ = 0; 501 } 502 copy_done: 503 504 /* copy the original arguments and a NULL */ 505 while (*ac) 506 nargv[i++] = *(ac++); 507 nargv[i] = NULL; 508 } 509 #endif 510 511 /* compress input to output. Return bytes read, -1 on error */ 512 static off_t 513 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime) 514 { 515 z_stream z; 516 char *outbufp, *inbufp; 517 off_t in_tot = 0, out_tot = 0; 518 ssize_t in_size; 519 int i, error; 520 uLong crc; 521 #ifdef SMALL 522 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0, 523 0, 0, 0, 0, 524 0, OS_CODE }; 525 #endif 526 527 outbufp = malloc(BUFLEN); 528 inbufp = malloc(BUFLEN); 529 if (outbufp == NULL || inbufp == NULL) { 530 maybe_err("malloc failed"); 531 goto out; 532 } 533 534 memset(&z, 0, sizeof z); 535 z.zalloc = Z_NULL; 536 z.zfree = Z_NULL; 537 z.opaque = 0; 538 539 #ifdef SMALL 540 memcpy(outbufp, header, sizeof header); 541 i = sizeof header; 542 #else 543 if (nflag != 0) { 544 mtime = 0; 545 origname = ""; 546 } 547 548 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s", 549 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 550 *origname ? ORIG_NAME : 0, 551 mtime & 0xff, 552 (mtime >> 8) & 0xff, 553 (mtime >> 16) & 0xff, 554 (mtime >> 24) & 0xff, 555 numflag == 1 ? 4 : numflag == 9 ? 2 : 0, 556 OS_CODE, origname); 557 if (i >= BUFLEN) 558 /* this need PATH_MAX > BUFLEN ... */ 559 maybe_err("snprintf"); 560 if (*origname) 561 i++; 562 #endif 563 564 z.next_out = outbufp + i; 565 z.avail_out = BUFLEN - i; 566 567 error = deflateInit2(&z, numflag, Z_DEFLATED, 568 (-MAX_WBITS), 8, Z_DEFAULT_STRATEGY); 569 if (error != Z_OK) { 570 maybe_warnx("deflateInit2 failed"); 571 in_tot = -1; 572 goto out; 573 } 574 575 crc = crc32(0L, Z_NULL, 0); 576 for (;;) { 577 if (z.avail_out == 0) { 578 if (write(out, outbufp, BUFLEN) != BUFLEN) { 579 maybe_warn("write"); 580 out_tot = -1; 581 goto out; 582 } 583 584 out_tot += BUFLEN; 585 z.next_out = outbufp; 586 z.avail_out = BUFLEN; 587 } 588 589 if (z.avail_in == 0) { 590 in_size = read(in, inbufp, BUFLEN); 591 if (in_size < 0) { 592 maybe_warn("read"); 593 in_tot = -1; 594 goto out; 595 } 596 if (in_size == 0) 597 break; 598 599 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size); 600 in_tot += in_size; 601 z.next_in = inbufp; 602 z.avail_in = in_size; 603 } 604 605 error = deflate(&z, Z_NO_FLUSH); 606 if (error != Z_OK && error != Z_STREAM_END) { 607 maybe_warnx("deflate failed"); 608 in_tot = -1; 609 goto out; 610 } 611 } 612 613 /* clean up */ 614 for (;;) { 615 size_t len; 616 ssize_t w; 617 618 error = deflate(&z, Z_FINISH); 619 if (error != Z_OK && error != Z_STREAM_END) { 620 maybe_warnx("deflate failed"); 621 in_tot = -1; 622 goto out; 623 } 624 625 len = (char *)z.next_out - outbufp; 626 627 w = write(out, outbufp, len); 628 if (w == -1 || (size_t)w != len) { 629 maybe_warn("write"); 630 out_tot = -1; 631 goto out; 632 } 633 out_tot += len; 634 z.next_out = outbufp; 635 z.avail_out = BUFLEN; 636 637 if (error == Z_STREAM_END) 638 break; 639 } 640 641 if (deflateEnd(&z) != Z_OK) { 642 maybe_warnx("deflateEnd failed"); 643 in_tot = -1; 644 goto out; 645 } 646 647 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c", 648 (int)crc & 0xff, 649 (int)(crc >> 8) & 0xff, 650 (int)(crc >> 16) & 0xff, 651 (int)(crc >> 24) & 0xff, 652 (int)in_tot & 0xff, 653 (int)(in_tot >> 8) & 0xff, 654 (int)(in_tot >> 16) & 0xff, 655 (int)(in_tot >> 24) & 0xff); 656 if (i != 8) 657 maybe_err("snprintf"); 658 #if 0 659 if (in_tot > 0xffffffff) 660 maybe_warn("input file size >= 4GB cannot be saved"); 661 #endif 662 if (write(out, outbufp, i) != i) { 663 maybe_warn("write"); 664 in_tot = -1; 665 } else 666 out_tot += i; 667 668 out: 669 if (inbufp != NULL) 670 free(inbufp); 671 if (outbufp != NULL) 672 free(outbufp); 673 if (gsizep) 674 *gsizep = out_tot; 675 return in_tot; 676 } 677 678 /* 679 * uncompress input to output then close the input. return the 680 * uncompressed size written, and put the compressed sized read 681 * into `*gsizep'. 682 */ 683 static off_t 684 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep, 685 const char *filename) 686 { 687 z_stream z; 688 char *outbufp, *inbufp; 689 off_t out_tot = -1, in_tot = 0; 690 uint32_t out_sub_tot = 0; 691 enum { 692 GZSTATE_MAGIC0, 693 GZSTATE_MAGIC1, 694 GZSTATE_METHOD, 695 GZSTATE_FLAGS, 696 GZSTATE_SKIPPING, 697 GZSTATE_EXTRA, 698 GZSTATE_EXTRA2, 699 GZSTATE_EXTRA3, 700 GZSTATE_ORIGNAME, 701 GZSTATE_COMMENT, 702 GZSTATE_HEAD_CRC1, 703 GZSTATE_HEAD_CRC2, 704 GZSTATE_INIT, 705 GZSTATE_READ, 706 GZSTATE_CRC, 707 GZSTATE_LEN, 708 } state = GZSTATE_MAGIC0; 709 int flags = 0, skip_count = 0; 710 int error = Z_STREAM_ERROR, done_reading = 0; 711 uLong crc = 0; 712 ssize_t wr; 713 int needmore = 0; 714 715 #define ADVANCE() { z.next_in++; z.avail_in--; } 716 717 if ((outbufp = malloc(BUFLEN)) == NULL) { 718 maybe_err("malloc failed"); 719 goto out2; 720 } 721 if ((inbufp = malloc(BUFLEN)) == NULL) { 722 maybe_err("malloc failed"); 723 goto out1; 724 } 725 726 memset(&z, 0, sizeof z); 727 z.avail_in = prelen; 728 z.next_in = pre; 729 z.avail_out = BUFLEN; 730 z.next_out = outbufp; 731 z.zalloc = NULL; 732 z.zfree = NULL; 733 z.opaque = 0; 734 735 in_tot = prelen; 736 out_tot = 0; 737 738 for (;;) { 739 if ((z.avail_in == 0 || needmore) && done_reading == 0) { 740 ssize_t in_size; 741 742 if (z.avail_in > 0) { 743 memmove(inbufp, z.next_in, z.avail_in); 744 } 745 z.next_in = inbufp; 746 in_size = read(in, z.next_in + z.avail_in, 747 BUFLEN - z.avail_in); 748 749 if (in_size == -1) { 750 maybe_warn("failed to read stdin"); 751 goto stop_and_fail; 752 } else if (in_size == 0) { 753 done_reading = 1; 754 } 755 756 z.avail_in += in_size; 757 needmore = 0; 758 759 in_tot += in_size; 760 } 761 if (z.avail_in == 0) { 762 if (done_reading && state != GZSTATE_MAGIC0) { 763 maybe_warnx("%s: unexpected end of file", 764 filename); 765 goto stop_and_fail; 766 } 767 goto stop; 768 } 769 switch (state) { 770 case GZSTATE_MAGIC0: 771 if (*z.next_in != GZIP_MAGIC0) { 772 if (in_tot > 0) { 773 maybe_warnx("%s: trailing garbage " 774 "ignored", filename); 775 goto stop; 776 } 777 maybe_warnx("input not gziped (MAGIC0)"); 778 goto stop_and_fail; 779 } 780 ADVANCE(); 781 state++; 782 out_sub_tot = 0; 783 crc = crc32(0L, Z_NULL, 0); 784 break; 785 786 case GZSTATE_MAGIC1: 787 if (*z.next_in != GZIP_MAGIC1 && 788 *z.next_in != GZIP_OMAGIC1) { 789 maybe_warnx("input not gziped (MAGIC1)"); 790 goto stop_and_fail; 791 } 792 ADVANCE(); 793 state++; 794 break; 795 796 case GZSTATE_METHOD: 797 if (*z.next_in != Z_DEFLATED) { 798 maybe_warnx("unknown compression method"); 799 goto stop_and_fail; 800 } 801 ADVANCE(); 802 state++; 803 break; 804 805 case GZSTATE_FLAGS: 806 flags = *z.next_in; 807 ADVANCE(); 808 skip_count = 6; 809 state++; 810 break; 811 812 case GZSTATE_SKIPPING: 813 if (skip_count > 0) { 814 skip_count--; 815 ADVANCE(); 816 } else 817 state++; 818 break; 819 820 case GZSTATE_EXTRA: 821 if ((flags & EXTRA_FIELD) == 0) { 822 state = GZSTATE_ORIGNAME; 823 break; 824 } 825 skip_count = *z.next_in; 826 ADVANCE(); 827 state++; 828 break; 829 830 case GZSTATE_EXTRA2: 831 skip_count |= ((*z.next_in) << 8); 832 ADVANCE(); 833 state++; 834 break; 835 836 case GZSTATE_EXTRA3: 837 if (skip_count > 0) { 838 skip_count--; 839 ADVANCE(); 840 } else 841 state++; 842 break; 843 844 case GZSTATE_ORIGNAME: 845 if ((flags & ORIG_NAME) == 0) { 846 state++; 847 break; 848 } 849 if (*z.next_in == 0) 850 state++; 851 ADVANCE(); 852 break; 853 854 case GZSTATE_COMMENT: 855 if ((flags & COMMENT) == 0) { 856 state++; 857 break; 858 } 859 if (*z.next_in == 0) 860 state++; 861 ADVANCE(); 862 break; 863 864 case GZSTATE_HEAD_CRC1: 865 if (flags & HEAD_CRC) 866 skip_count = 2; 867 else 868 skip_count = 0; 869 state++; 870 break; 871 872 case GZSTATE_HEAD_CRC2: 873 if (skip_count > 0) { 874 skip_count--; 875 ADVANCE(); 876 } else 877 state++; 878 break; 879 880 case GZSTATE_INIT: 881 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) { 882 maybe_warnx("failed to inflateInit"); 883 goto stop_and_fail; 884 } 885 state++; 886 break; 887 888 case GZSTATE_READ: 889 error = inflate(&z, Z_FINISH); 890 switch (error) { 891 /* Z_BUF_ERROR goes with Z_FINISH... */ 892 case Z_BUF_ERROR: 893 case Z_STREAM_END: 894 case Z_OK: 895 break; 896 897 case Z_NEED_DICT: 898 maybe_warnx("Z_NEED_DICT error"); 899 goto stop_and_fail; 900 case Z_DATA_ERROR: 901 maybe_warnx("data stream error"); 902 goto stop_and_fail; 903 case Z_STREAM_ERROR: 904 maybe_warnx("internal stream error"); 905 goto stop_and_fail; 906 case Z_MEM_ERROR: 907 maybe_warnx("memory allocation error"); 908 goto stop_and_fail; 909 910 default: 911 maybe_warn("unknown error from inflate(): %d", 912 error); 913 } 914 wr = BUFLEN - z.avail_out; 915 916 if (wr != 0) { 917 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 918 if ( 919 #ifndef SMALL 920 /* don't write anything with -t */ 921 tflag == 0 && 922 #endif 923 write(out, outbufp, wr) != wr) { 924 maybe_warn("error writing to output"); 925 goto stop_and_fail; 926 } 927 928 out_tot += wr; 929 out_sub_tot += wr; 930 } 931 932 if (error == Z_STREAM_END) { 933 inflateEnd(&z); 934 state++; 935 } 936 937 z.next_out = outbufp; 938 z.avail_out = BUFLEN; 939 940 break; 941 case GZSTATE_CRC: 942 { 943 uLong origcrc; 944 945 if (z.avail_in < 4) { 946 if (!done_reading) { 947 needmore = 1; 948 continue; 949 } 950 maybe_warnx("truncated input"); 951 goto stop_and_fail; 952 } 953 origcrc = ((unsigned)z.next_in[0] & 0xff) | 954 ((unsigned)z.next_in[1] & 0xff) << 8 | 955 ((unsigned)z.next_in[2] & 0xff) << 16 | 956 ((unsigned)z.next_in[3] & 0xff) << 24; 957 if (origcrc != crc) { 958 maybe_warnx("invalid compressed" 959 " data--crc error"); 960 goto stop_and_fail; 961 } 962 } 963 964 z.avail_in -= 4; 965 z.next_in += 4; 966 967 if (!z.avail_in && done_reading) { 968 goto stop; 969 } 970 state++; 971 break; 972 case GZSTATE_LEN: 973 { 974 uLong origlen; 975 976 if (z.avail_in < 4) { 977 if (!done_reading) { 978 needmore = 1; 979 continue; 980 } 981 maybe_warnx("truncated input"); 982 goto stop_and_fail; 983 } 984 origlen = ((unsigned)z.next_in[0] & 0xff) | 985 ((unsigned)z.next_in[1] & 0xff) << 8 | 986 ((unsigned)z.next_in[2] & 0xff) << 16 | 987 ((unsigned)z.next_in[3] & 0xff) << 24; 988 989 if (origlen != out_sub_tot) { 990 maybe_warnx("invalid compressed" 991 " data--length error"); 992 goto stop_and_fail; 993 } 994 } 995 996 z.avail_in -= 4; 997 z.next_in += 4; 998 999 if (error < 0) { 1000 maybe_warnx("decompression error"); 1001 goto stop_and_fail; 1002 } 1003 state = GZSTATE_MAGIC0; 1004 break; 1005 } 1006 continue; 1007 stop_and_fail: 1008 out_tot = -1; 1009 stop: 1010 break; 1011 } 1012 if (state > GZSTATE_INIT) 1013 inflateEnd(&z); 1014 1015 free(inbufp); 1016 out1: 1017 free(outbufp); 1018 out2: 1019 if (gsizep) 1020 *gsizep = in_tot; 1021 return (out_tot); 1022 } 1023 1024 #ifndef SMALL 1025 /* 1026 * set the owner, mode, flags & utimes using the given file descriptor. 1027 * file is only used in possible warning messages. 1028 */ 1029 static void 1030 copymodes(int fd, const struct stat *sbp, const char *file) 1031 { 1032 struct timeval times[2]; 1033 struct stat sb; 1034 1035 /* 1036 * If we have no info on the input, give this file some 1037 * default values and return.. 1038 */ 1039 if (sbp == NULL) { 1040 mode_t mask = umask(022); 1041 1042 (void)fchmod(fd, DEFFILEMODE & ~mask); 1043 (void)umask(mask); 1044 return; 1045 } 1046 sb = *sbp; 1047 1048 /* if the chown fails, remove set-id bits as-per compress(1) */ 1049 if (fchown(fd, sb.st_uid, sb.st_gid) < 0) { 1050 if (errno != EPERM) 1051 maybe_warn("couldn't fchown: %s", file); 1052 sb.st_mode &= ~(S_ISUID|S_ISGID); 1053 } 1054 1055 /* we only allow set-id and the 9 normal permission bits */ 1056 sb.st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1057 if (fchmod(fd, sb.st_mode) < 0) 1058 maybe_warn("couldn't fchmod: %s", file); 1059 1060 /* only try flags if they exist already */ 1061 if (sb.st_flags != 0 && fchflags(fd, sb.st_flags) < 0) 1062 maybe_warn("couldn't fchflags: %s", file); 1063 1064 TIMESPEC_TO_TIMEVAL(×[0], &sb.st_atimespec); 1065 TIMESPEC_TO_TIMEVAL(×[1], &sb.st_mtimespec); 1066 if (futimes(fd, times) < 0) 1067 maybe_warn("couldn't utimes: %s", file); 1068 } 1069 #endif 1070 1071 /* what sort of file is this? */ 1072 static enum filetype 1073 file_gettype(u_char *buf) 1074 { 1075 1076 if (buf[0] == GZIP_MAGIC0 && 1077 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1078 return FT_GZIP; 1079 else 1080 #ifndef NO_BZIP2_SUPPORT 1081 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1082 buf[3] >= '0' && buf[3] <= '9') 1083 return FT_BZIP2; 1084 else 1085 #endif 1086 #ifndef NO_COMPRESS_SUPPORT 1087 if (memcmp(buf, Z_MAGIC, 2) == 0) 1088 return FT_Z; 1089 else 1090 #endif 1091 #ifndef NO_PACK_SUPPORT 1092 if (memcmp(buf, PACK_MAGIC, 2) == 0) 1093 return FT_PACK; 1094 else 1095 #endif 1096 return FT_UNKNOWN; 1097 } 1098 1099 #ifndef SMALL 1100 /* check the outfile is OK. */ 1101 static int 1102 check_outfile(const char *outfile) 1103 { 1104 struct stat sb; 1105 int ok = 1; 1106 1107 if (lflag == 0 && stat(outfile, &sb) == 0) { 1108 if (fflag) 1109 unlink(outfile); 1110 else if (isatty(STDIN_FILENO)) { 1111 char ans[10] = { 'n', '\0' }; /* default */ 1112 1113 fprintf(stderr, "%s already exists -- do you wish to " 1114 "overwrite (y or n)? " , outfile); 1115 (void)fgets(ans, sizeof(ans) - 1, stdin); 1116 if (ans[0] != 'y' && ans[0] != 'Y') { 1117 fprintf(stderr, "\tnot overwriting\n"); 1118 ok = 0; 1119 } else 1120 unlink(outfile); 1121 } else { 1122 maybe_warnx("%s already exists -- skipping", outfile); 1123 ok = 0; 1124 } 1125 } 1126 return ok; 1127 } 1128 1129 static void 1130 unlink_input(const char *file, const struct stat *sb) 1131 { 1132 struct stat nsb; 1133 1134 if (kflag) 1135 return; 1136 if (stat(file, &nsb) != 0) 1137 /* Must be gone alrady */ 1138 return; 1139 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1140 /* Definitely a different file */ 1141 return; 1142 unlink(file); 1143 } 1144 #endif 1145 1146 static const suffixes_t * 1147 check_suffix(char *file, int xlate) 1148 { 1149 const suffixes_t *s; 1150 int len = strlen(file); 1151 char *sp; 1152 1153 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1154 /* if it doesn't fit in "a.suf", don't bother */ 1155 if (s->ziplen >= len) 1156 continue; 1157 sp = file + len - s->ziplen; 1158 if (strcmp(s->zipped, sp) != 0) 1159 continue; 1160 if (xlate) 1161 strcpy(sp, s->normal); 1162 return s; 1163 } 1164 return NULL; 1165 } 1166 1167 /* 1168 * compress the given file: create a corresponding .gz file and remove the 1169 * original. 1170 */ 1171 static off_t 1172 file_compress(char *file, char *outfile, size_t outsize) 1173 { 1174 int in; 1175 int out; 1176 off_t size, insize; 1177 #ifndef SMALL 1178 struct stat isb, osb; 1179 const suffixes_t *suff; 1180 #endif 1181 1182 in = open(file, O_RDONLY); 1183 if (in == -1) { 1184 maybe_warn("can't open %s", file); 1185 return -1; 1186 } 1187 1188 if (cflag == 0) { 1189 #ifndef SMALL 1190 if (fstat(in, &isb) == 0) { 1191 if (isb.st_nlink > 1 && fflag == 0) { 1192 maybe_warnx("%s has %d other link%s -- " 1193 "skipping", file, isb.st_nlink - 1, 1194 isb.st_nlink == 1 ? "" : "s"); 1195 close(in); 1196 return -1; 1197 } 1198 } 1199 1200 if (fflag == 0 && (suff = check_suffix(file, 0)) 1201 && suff->zipped[0] != 0) { 1202 maybe_warnx("%s already has %s suffix -- unchanged", 1203 file, suff->zipped); 1204 close(in); 1205 return -1; 1206 } 1207 #endif 1208 1209 /* Add (usually) .gz to filename */ 1210 if ((size_t)snprintf(outfile, outsize, "%s%s", 1211 file, suffixes[0].zipped) >= outsize) { 1212 errx(1, "file path too long: %s", file); 1213 } 1214 #ifndef SMALL 1215 if (check_outfile(outfile) == 0) { 1216 close(in); 1217 return -1; 1218 } 1219 #endif 1220 } 1221 1222 if (cflag == 0) { 1223 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600); 1224 if (out == -1) { 1225 maybe_warn("could not create output: %s", outfile); 1226 fclose(stdin); 1227 return -1; 1228 } 1229 } else 1230 out = STDOUT_FILENO; 1231 1232 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1233 1234 (void)close(in); 1235 1236 /* 1237 * If there was an error, insize will be -1. 1238 * If we compressed to stdout, just return the size. 1239 * Otherwise stat the file and check it is the correct size. 1240 * We only blow away the file if we can stat the output and it 1241 * has the expected size. 1242 */ 1243 if (cflag != 0) 1244 return insize == -1 ? -1 : size; 1245 1246 #ifndef SMALL 1247 if (fstat(out, &osb) != 0) { 1248 maybe_warn("couldn't stat: %s", outfile); 1249 goto bad_outfile; 1250 } 1251 1252 if (osb.st_size != size) { 1253 maybe_warnx("output file: %s wrong size (%" PRIdOFF 1254 " != %" PRIdOFF "), deleting", 1255 outfile, osb.st_size, size); 1256 goto bad_outfile; 1257 } 1258 1259 copymodes(out, &isb, outfile); 1260 #endif 1261 if (close(out) == -1) 1262 maybe_warn("couldn't close output"); 1263 1264 /* output is good, ok to delete input */ 1265 unlink_input(file, &isb); 1266 return size; 1267 1268 #ifndef SMALL 1269 bad_outfile: 1270 if (close(out) == -1) 1271 maybe_warn("couldn't close output"); 1272 1273 maybe_warnx("leaving original %s", file); 1274 unlink(outfile); 1275 return size; 1276 #endif 1277 } 1278 1279 /* uncompress the given file and remove the original */ 1280 static off_t 1281 file_uncompress(char *file, char *outfile, size_t outsize) 1282 { 1283 struct stat isb, osb; 1284 off_t size; 1285 ssize_t rbytes; 1286 unsigned char header1[4]; 1287 enum filetype method; 1288 int fd, ofd, zfd = -1; 1289 #ifndef SMALL 1290 ssize_t rv; 1291 time_t timestamp = 0; 1292 unsigned char name[PATH_MAX + 1]; 1293 #endif 1294 1295 /* gather the old name info */ 1296 1297 fd = open(file, O_RDONLY); 1298 if (fd < 0) { 1299 maybe_warn("can't open %s", file); 1300 goto lose; 1301 } 1302 1303 if ((size_t)snprintf(outfile, outsize, "%s", file) >= outsize) 1304 errx(1, "file path too long: %s", file); 1305 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1306 maybe_warnx("%s: unknown suffix -- ignored", file); 1307 goto lose; 1308 } 1309 1310 rbytes = read(fd, header1, sizeof header1); 1311 if (rbytes != sizeof header1) { 1312 /* we don't want to fail here. */ 1313 #ifndef SMALL 1314 if (fflag) 1315 goto lose; 1316 #endif 1317 if (rbytes == -1) 1318 maybe_warn("can't read %s", file); 1319 else 1320 goto unexpected_EOF; 1321 goto lose; 1322 } 1323 1324 method = file_gettype(header1); 1325 1326 #ifndef SMALL 1327 if (fflag == 0 && method == FT_UNKNOWN) { 1328 maybe_warnx("%s: not in gzip format", file); 1329 goto lose; 1330 } 1331 1332 #endif 1333 1334 #ifndef SMALL 1335 if (method == FT_GZIP && Nflag) { 1336 unsigned char ts[4]; /* timestamp */ 1337 1338 rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP); 1339 if (rv >= 0 && rv < (ssize_t)(sizeof ts)) 1340 goto unexpected_EOF; 1341 if (rv == -1) { 1342 if (!fflag) 1343 maybe_warn("can't read %s", file); 1344 goto lose; 1345 } 1346 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0]; 1347 1348 if (header1[3] & ORIG_NAME) { 1349 rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME); 1350 if (rbytes < 0) { 1351 maybe_warn("can't read %s", file); 1352 goto lose; 1353 } 1354 if (name[0] != 0) { 1355 /* preserve original directory name */ 1356 char *dp = strrchr(file, '/'); 1357 if (dp == NULL) 1358 dp = file; 1359 else 1360 dp++; 1361 snprintf(outfile, outsize, "%.*s%.*s", 1362 (int) (dp - file), 1363 file, (int) rbytes, name); 1364 } 1365 } 1366 } 1367 #endif 1368 lseek(fd, 0, SEEK_SET); 1369 1370 if (cflag == 0 || lflag) { 1371 if (fstat(fd, &isb) != 0) 1372 goto lose; 1373 #ifndef SMALL 1374 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1375 maybe_warnx("%s has %d other links -- skipping", 1376 file, isb.st_nlink - 1); 1377 goto lose; 1378 } 1379 if (nflag == 0 && timestamp) 1380 isb.st_mtime = timestamp; 1381 if (check_outfile(outfile) == 0) 1382 goto lose; 1383 #endif 1384 } 1385 1386 if (cflag == 0 && lflag == 0) { 1387 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1388 if (zfd == STDOUT_FILENO) { 1389 /* We won't close STDOUT_FILENO later... */ 1390 zfd = dup(zfd); 1391 close(STDOUT_FILENO); 1392 } 1393 if (zfd == -1) { 1394 maybe_warn("can't open %s", outfile); 1395 goto lose; 1396 } 1397 } else 1398 zfd = STDOUT_FILENO; 1399 1400 #ifndef NO_BZIP2_SUPPORT 1401 if (method == FT_BZIP2) { 1402 1403 /* XXX */ 1404 if (lflag) { 1405 maybe_warnx("no -l with bzip2 files"); 1406 goto lose; 1407 } 1408 1409 size = unbzip2(fd, zfd, NULL, 0, NULL); 1410 } else 1411 #endif 1412 1413 #ifndef NO_COMPRESS_SUPPORT 1414 if (method == FT_Z) { 1415 FILE *in, *out; 1416 1417 /* XXX */ 1418 if (lflag) { 1419 maybe_warnx("no -l with Lempel-Ziv files"); 1420 goto lose; 1421 } 1422 1423 if ((in = zdopen(fd)) == NULL) { 1424 maybe_warn("zdopen for read: %s", file); 1425 goto lose; 1426 } 1427 1428 out = fdopen(dup(zfd), "w"); 1429 if (out == NULL) { 1430 maybe_warn("fdopen for write: %s", outfile); 1431 fclose(in); 1432 goto lose; 1433 } 1434 1435 size = zuncompress(in, out, NULL, 0, NULL); 1436 /* need to fclose() if ferror() is true... */ 1437 if (ferror(in) | fclose(in)) { 1438 maybe_warn("failed infile fclose"); 1439 unlink(outfile); 1440 (void)fclose(out); 1441 } 1442 if (fclose(out) != 0) { 1443 maybe_warn("failed outfile fclose"); 1444 unlink(outfile); 1445 goto lose; 1446 } 1447 } else 1448 #endif 1449 1450 #ifndef NO_PACK_SUPPORT 1451 if (method == FT_PACK) { 1452 if (lflag) { 1453 maybe_warnx("no -l with packed files"); 1454 goto lose; 1455 } 1456 1457 size = unpack(fd, zfd, NULL, 0, NULL); 1458 } else 1459 #endif 1460 1461 #ifndef SMALL 1462 if (method == FT_UNKNOWN) { 1463 if (lflag) { 1464 maybe_warnx("no -l for unknown filetypes"); 1465 goto lose; 1466 } 1467 size = cat_fd(NULL, 0, NULL, fd); 1468 } else 1469 #endif 1470 { 1471 if (lflag) { 1472 print_list(fd, isb.st_size, outfile, isb.st_mtime); 1473 close(fd); 1474 return -1; /* XXX */ 1475 } 1476 1477 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1478 } 1479 1480 if (close(fd) != 0) 1481 maybe_warn("couldn't close input"); 1482 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1483 maybe_warn("couldn't close output"); 1484 1485 if (size == -1) { 1486 if (cflag == 0) 1487 unlink(outfile); 1488 maybe_warnx("%s: uncompress failed", file); 1489 return -1; 1490 } 1491 1492 /* if testing, or we uncompressed to stdout, this is all we need */ 1493 #ifndef SMALL 1494 if (tflag) 1495 return size; 1496 #endif 1497 /* if we are uncompressing to stdin, don't remove the file. */ 1498 if (cflag) 1499 return size; 1500 1501 /* 1502 * if we create a file... 1503 */ 1504 /* 1505 * if we can't stat the file don't remove the file. 1506 */ 1507 1508 ofd = open(outfile, O_RDWR, 0); 1509 if (ofd == -1) { 1510 maybe_warn("couldn't open (leaving original): %s", 1511 outfile); 1512 return -1; 1513 } 1514 if (fstat(ofd, &osb) != 0) { 1515 maybe_warn("couldn't stat (leaving original): %s", 1516 outfile); 1517 close(ofd); 1518 return -1; 1519 } 1520 if (osb.st_size != size) { 1521 maybe_warnx("stat gave different size: %" PRIdOFF 1522 " != %" PRIdOFF " (leaving original)", 1523 size, osb.st_size); 1524 close(ofd); 1525 unlink(outfile); 1526 return -1; 1527 } 1528 unlink_input(file, &isb); 1529 #ifndef SMALL 1530 copymodes(ofd, &isb, outfile); 1531 #endif 1532 close(ofd); 1533 return size; 1534 1535 unexpected_EOF: 1536 maybe_warnx("%s: unexpected end of file", file); 1537 lose: 1538 if (fd != -1) 1539 close(fd); 1540 if (zfd != -1 && zfd != STDOUT_FILENO) 1541 close(fd); 1542 return -1; 1543 } 1544 1545 #ifndef SMALL 1546 static off_t 1547 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd) 1548 { 1549 char buf[BUFLEN]; 1550 off_t in_tot; 1551 ssize_t w; 1552 1553 in_tot = count; 1554 w = write(STDOUT_FILENO, prepend, count); 1555 if (w == -1 || (size_t)w != count) { 1556 maybe_warn("write to stdout"); 1557 return -1; 1558 } 1559 for (;;) { 1560 ssize_t rv; 1561 1562 rv = read(fd, buf, sizeof buf); 1563 if (rv == 0) 1564 break; 1565 if (rv < 0) { 1566 maybe_warn("read from fd %d", fd); 1567 break; 1568 } 1569 1570 if (write(STDOUT_FILENO, buf, rv) != rv) { 1571 maybe_warn("write to stdout"); 1572 break; 1573 } 1574 in_tot += rv; 1575 } 1576 1577 if (gsizep) 1578 *gsizep = in_tot; 1579 return (in_tot); 1580 } 1581 #endif 1582 1583 static void 1584 handle_stdin(void) 1585 { 1586 unsigned char header1[4]; 1587 off_t usize, gsize; 1588 enum filetype method; 1589 ssize_t bytes_read; 1590 #ifndef NO_COMPRESS_SUPPORT 1591 FILE *in; 1592 #endif 1593 1594 #ifndef SMALL 1595 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1596 maybe_warnx("standard input is a terminal -- ignoring"); 1597 return; 1598 } 1599 #endif 1600 1601 if (lflag) { 1602 struct stat isb; 1603 1604 /* XXX could read the whole file, etc. */ 1605 if (fstat(STDIN_FILENO, &isb) < 0) { 1606 maybe_warn("fstat"); 1607 return; 1608 } 1609 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime); 1610 return; 1611 } 1612 1613 bytes_read = read_retry(STDIN_FILENO, header1, sizeof header1); 1614 if (bytes_read == -1) { 1615 maybe_warn("can't read stdin"); 1616 return; 1617 } else if (bytes_read != sizeof(header1)) { 1618 maybe_warnx("(stdin): unexpected end of file"); 1619 return; 1620 } 1621 1622 method = file_gettype(header1); 1623 switch (method) { 1624 default: 1625 #ifndef SMALL 1626 if (fflag == 0) { 1627 maybe_warnx("unknown compression format"); 1628 return; 1629 } 1630 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO); 1631 break; 1632 #endif 1633 case FT_GZIP: 1634 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1635 header1, sizeof header1, &gsize, "(stdin)"); 1636 break; 1637 #ifndef NO_BZIP2_SUPPORT 1638 case FT_BZIP2: 1639 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1640 header1, sizeof header1, &gsize); 1641 break; 1642 #endif 1643 #ifndef NO_COMPRESS_SUPPORT 1644 case FT_Z: 1645 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1646 maybe_warnx("zopen of stdin"); 1647 return; 1648 } 1649 1650 usize = zuncompress(in, stdout, header1, sizeof header1, &gsize); 1651 fclose(in); 1652 break; 1653 #endif 1654 #ifndef NO_PACK_SUPPORT 1655 case FT_PACK: 1656 usize = unpack(STDIN_FILENO, STDOUT_FILENO, 1657 (char *)header1, sizeof header1, &gsize); 1658 break; 1659 #endif 1660 } 1661 1662 #ifndef SMALL 1663 if (vflag && !tflag && usize != -1 && gsize != -1) 1664 print_verbage(NULL, NULL, usize, gsize); 1665 if (vflag && tflag) 1666 print_test("(stdin)", usize != -1); 1667 #endif 1668 1669 } 1670 1671 static void 1672 handle_stdout(void) 1673 { 1674 off_t gsize, usize; 1675 struct stat sb; 1676 time_t systime; 1677 uint32_t mtime; 1678 int ret; 1679 1680 #ifndef SMALL 1681 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1682 maybe_warnx("standard output is a terminal -- ignoring"); 1683 return; 1684 } 1685 #endif 1686 /* If stdin is a file use it's mtime, otherwise use current time */ 1687 ret = fstat(STDIN_FILENO, &sb); 1688 1689 #ifndef SMALL 1690 if (ret < 0) { 1691 maybe_warn("Can't stat stdin"); 1692 return; 1693 } 1694 #endif 1695 1696 if (S_ISREG(sb.st_mode)) 1697 mtime = (uint32_t)sb.st_mtime; 1698 else { 1699 systime = time(NULL); 1700 #ifndef SMALL 1701 if (systime == -1) { 1702 maybe_warn("time"); 1703 return; 1704 } 1705 #endif 1706 mtime = (uint32_t)systime; 1707 } 1708 1709 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime); 1710 #ifndef SMALL 1711 if (vflag && !tflag && usize != -1 && gsize != -1) 1712 print_verbage(NULL, NULL, usize, gsize); 1713 #endif 1714 } 1715 1716 /* do what is asked for, for the path name */ 1717 static void 1718 handle_pathname(char *path) 1719 { 1720 char *opath = path, *s = NULL; 1721 ssize_t len; 1722 int slen; 1723 struct stat sb; 1724 1725 /* check for stdout/stdin */ 1726 if (path[0] == '-' && path[1] == '\0') { 1727 if (dflag) 1728 handle_stdin(); 1729 else 1730 handle_stdout(); 1731 return; 1732 } 1733 1734 retry: 1735 if (stat(path, &sb) != 0) { 1736 /* lets try <path>.gz if we're decompressing */ 1737 if (dflag && s == NULL && errno == ENOENT) { 1738 len = strlen(path); 1739 slen = suffixes[0].ziplen; 1740 s = malloc(len + slen + 1); 1741 if (s == NULL) 1742 maybe_err("malloc"); 1743 memcpy(s, path, len); 1744 memcpy(s + len, suffixes[0].zipped, slen + 1); 1745 path = s; 1746 goto retry; 1747 } 1748 maybe_warn("can't stat: %s", opath); 1749 goto out; 1750 } 1751 1752 if (S_ISDIR(sb.st_mode)) { 1753 #ifndef SMALL 1754 if (rflag) 1755 handle_dir(path); 1756 else 1757 #endif 1758 maybe_warnx("%s is a directory", path); 1759 goto out; 1760 } 1761 1762 if (S_ISREG(sb.st_mode)) 1763 handle_file(path, &sb); 1764 else 1765 maybe_warnx("%s is not a regular file", path); 1766 1767 out: 1768 if (s) 1769 free(s); 1770 } 1771 1772 /* compress/decompress a file */ 1773 static void 1774 handle_file(char *file, struct stat *sbp) 1775 { 1776 off_t usize, gsize; 1777 char outfile[PATH_MAX]; 1778 1779 infile = file; 1780 if (dflag) { 1781 usize = file_uncompress(file, outfile, sizeof(outfile)); 1782 #ifndef SMALL 1783 if (vflag && tflag) 1784 print_test(file, usize != -1); 1785 #endif 1786 if (usize == -1) 1787 return; 1788 gsize = sbp->st_size; 1789 } else { 1790 gsize = file_compress(file, outfile, sizeof(outfile)); 1791 if (gsize == -1) 1792 return; 1793 usize = sbp->st_size; 1794 } 1795 1796 1797 #ifndef SMALL 1798 if (vflag && !tflag) 1799 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 1800 #endif 1801 } 1802 1803 #ifndef SMALL 1804 /* this is used with -r to recursively descend directories */ 1805 static void 1806 handle_dir(char *dir) 1807 { 1808 char *path_argv[2]; 1809 FTS *fts; 1810 FTSENT *entry; 1811 1812 path_argv[0] = dir; 1813 path_argv[1] = 0; 1814 fts = fts_open(path_argv, FTS_PHYSICAL | FTS_NOCHDIR, NULL); 1815 if (fts == NULL) { 1816 warn("couldn't fts_open %s", dir); 1817 return; 1818 } 1819 1820 while ((entry = fts_read(fts))) { 1821 switch(entry->fts_info) { 1822 case FTS_D: 1823 case FTS_DP: 1824 continue; 1825 1826 case FTS_DNR: 1827 case FTS_ERR: 1828 case FTS_NS: 1829 maybe_warn("%s", entry->fts_path); 1830 continue; 1831 case FTS_F: 1832 handle_file(entry->fts_path, entry->fts_statp); 1833 } 1834 } 1835 (void)fts_close(fts); 1836 } 1837 #endif 1838 1839 /* print a ratio - size reduction as a fraction of uncompressed size */ 1840 static void 1841 print_ratio(off_t in, off_t out, FILE *where) 1842 { 1843 int percent10; /* 10 * percent */ 1844 off_t diff; 1845 char buff[8]; 1846 int len; 1847 1848 diff = in - out/2; 1849 if (diff <= 0) 1850 /* 1851 * Output is more than double size of input! print -99.9% 1852 * Quite possibly we've failed to get the original size. 1853 */ 1854 percent10 = -999; 1855 else { 1856 /* 1857 * We only need 12 bits of result from the final division, 1858 * so reduce the values until a 32bit division will suffice. 1859 */ 1860 while (in > 0x100000) { 1861 diff >>= 1; 1862 in >>= 1; 1863 } 1864 if (in != 0) 1865 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 1866 else 1867 percent10 = 0; 1868 } 1869 1870 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 1871 /* Move the '.' to before the last digit */ 1872 buff[len - 1] = buff[len - 2]; 1873 buff[len - 2] = '.'; 1874 fprintf(where, "%5s%%", buff); 1875 } 1876 1877 #ifndef SMALL 1878 /* print compression statistics, and the new name (if there is one!) */ 1879 static void 1880 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 1881 { 1882 if (file) 1883 fprintf(stderr, "%s:%s ", file, 1884 strlen(file) < 7 ? "\t\t" : "\t"); 1885 print_ratio(usize, gsize, stderr); 1886 if (nfile) 1887 fprintf(stderr, " -- replaced with %s", nfile); 1888 fprintf(stderr, "\n"); 1889 fflush(stderr); 1890 } 1891 1892 /* print test results */ 1893 static void 1894 print_test(const char *file, int ok) 1895 { 1896 1897 if (exit_value == 0 && ok == 0) 1898 exit_value = 1; 1899 fprintf(stderr, "%s:%s %s\n", file, 1900 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 1901 fflush(stderr); 1902 } 1903 #endif 1904 1905 /* print a file's info ala --list */ 1906 /* eg: 1907 compressed uncompressed ratio uncompressed_name 1908 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 1909 */ 1910 static void 1911 print_list(int fd, off_t out, const char *outfile, time_t ts) 1912 { 1913 static int first = 1; 1914 #ifndef SMALL 1915 static off_t in_tot, out_tot; 1916 uint32_t crc = 0; 1917 #endif 1918 off_t in = 0, rv; 1919 1920 if (first) { 1921 #ifndef SMALL 1922 if (vflag) 1923 printf("method crc date time "); 1924 #endif 1925 if (qflag == 0) 1926 printf(" compressed uncompressed " 1927 "ratio uncompressed_name\n"); 1928 } 1929 first = 0; 1930 1931 /* print totals? */ 1932 #ifndef SMALL 1933 if (fd == -1) { 1934 in = in_tot; 1935 out = out_tot; 1936 } else 1937 #endif 1938 { 1939 /* read the last 4 bytes - this is the uncompressed size */ 1940 rv = lseek(fd, (off_t)(-8), SEEK_END); 1941 if (rv != -1) { 1942 unsigned char buf[8]; 1943 uint32_t usize; 1944 1945 rv = read(fd, (char *)buf, sizeof(buf)); 1946 if (rv == -1) 1947 maybe_warn("read of uncompressed size"); 1948 else if (rv != sizeof(buf)) 1949 maybe_warnx("read of uncompressed size"); 1950 1951 else { 1952 usize = buf[4] | buf[5] << 8 | 1953 buf[6] << 16 | buf[7] << 24; 1954 in = (off_t)usize; 1955 #ifndef SMALL 1956 crc = buf[0] | buf[1] << 8 | 1957 buf[2] << 16 | buf[3] << 24; 1958 #endif 1959 } 1960 } 1961 } 1962 1963 #ifndef SMALL 1964 if (vflag && fd == -1) 1965 printf(" "); 1966 else if (vflag) { 1967 char *date = ctime(&ts); 1968 1969 /* skip the day, 1/100th second, and year */ 1970 date += 4; 1971 date[12] = 0; 1972 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 1973 } 1974 in_tot += in; 1975 out_tot += out; 1976 #endif 1977 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 1978 print_ratio(in, out, stdout); 1979 printf(" %s\n", outfile); 1980 } 1981 1982 /* display the usage of NetBSD gzip */ 1983 static void 1984 usage(void) 1985 { 1986 1987 fprintf(stderr, "%s\n", gzip_version); 1988 fprintf(stderr, 1989 #ifdef SMALL 1990 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n", 1991 #else 1992 "usage: %s [-123456789acdfhklLNnqrtVv] [-S .suffix] [<file> [<file> ...]]\n" 1993 " -1 --fast fastest (worst) compression\n" 1994 " -2 .. -8 set compression level\n" 1995 " -9 --best best (slowest) compression\n" 1996 " -c --stdout write to stdout, keep original files\n" 1997 " --to-stdout\n" 1998 " -d --decompress uncompress files\n" 1999 " --uncompress\n" 2000 " -f --force force overwriting & compress links\n" 2001 " -h --help display this help\n" 2002 " -k --keep don't delete input files during operation\n" 2003 " -l --list list compressed file contents\n" 2004 " -N --name save or restore original file name and time stamp\n" 2005 " -n --no-name don't save original file name or time stamp\n" 2006 " -q --quiet output no warnings\n" 2007 " -r --recursive recursively compress files in directories\n" 2008 " -S .suf use suffix .suf instead of .gz\n" 2009 " --suffix .suf\n" 2010 " -t --test test compressed file\n" 2011 " -V --version display program version\n" 2012 " -v --verbose print extra statistics\n", 2013 #endif 2014 getprogname()); 2015 exit(0); 2016 } 2017 2018 /* display the version of NetBSD gzip */ 2019 static void 2020 display_version(void) 2021 { 2022 2023 fprintf(stderr, "%s\n", gzip_version); 2024 exit(0); 2025 } 2026 2027 #ifndef NO_BZIP2_SUPPORT 2028 #include "unbzip2.c" 2029 #endif 2030 #ifndef NO_COMPRESS_SUPPORT 2031 #include "zuncompress.c" 2032 #endif 2033 #ifndef NO_PACK_SUPPORT 2034 #include "unpack.c" 2035 #endif 2036 2037 static ssize_t 2038 read_retry(int fd, void *buf, size_t sz) 2039 { 2040 char *cp = buf; 2041 size_t left = MIN(sz, (size_t) SSIZE_MAX); 2042 2043 while (left > 0) { 2044 ssize_t ret; 2045 2046 ret = read(fd, cp, left); 2047 if (ret == -1) { 2048 return ret; 2049 } else if (ret == 0) { 2050 break; /* EOF */ 2051 } 2052 cp += ret; 2053 left -= ret; 2054 } 2055 2056 return sz - left; 2057 } 2058