1 /* $NetBSD: gzip.c,v 1.94 2009/04/12 10:31:14 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1997, 1998, 2003, 2004, 2006 Matthew R. Green 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* 30 * gzip.c -- GPL free gzip using zlib. 31 * 32 * RFC 1950 covers the zlib format 33 * RFC 1951 covers the deflate format 34 * RFC 1952 covers the gzip format 35 * 36 * TODO: 37 * - use mmap where possible 38 * - handle some signals better (remove outfile?) 39 * - make bzip2/compress -v/-t/-l support work as well as possible 40 */ 41 42 #include <sys/param.h> 43 #include <sys/stat.h> 44 #include <sys/time.h> 45 46 #include <err.h> 47 #include <errno.h> 48 #include <fcntl.h> 49 #include <fts.h> 50 #include <getopt.h> 51 #include <inttypes.h> 52 #include <libgen.h> 53 #include <stdarg.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <time.h> 58 #include <unistd.h> 59 #include <zlib.h> 60 61 #ifndef PRIdOFF 62 #define PRIdOFF PRId64 63 #endif 64 65 #ifndef PRId64 66 #define PRId64 "lld" 67 #endif 68 69 /* what type of file are we dealing with */ 70 enum filetype { 71 FT_GZIP, 72 #ifndef NO_BZIP2_SUPPORT 73 FT_BZIP2, 74 #endif 75 #ifndef NO_COMPRESS_SUPPORT 76 FT_Z, 77 #endif 78 #ifndef NO_PACK_SUPPORT 79 FT_PACK, 80 #endif 81 FT_LAST, 82 FT_UNKNOWN 83 }; 84 85 #ifndef NO_BZIP2_SUPPORT 86 #include <bzlib.h> 87 88 #define BZ2_SUFFIX ".bz2" 89 #define BZIP2_MAGIC "\102\132\150" 90 #endif 91 92 #ifndef NO_COMPRESS_SUPPORT 93 #define Z_SUFFIX ".Z" 94 #define Z_MAGIC "\037\235" 95 #endif 96 97 #ifndef NO_PACK_SUPPORT 98 #define PACK_MAGIC "\037\036" 99 #endif 100 101 #define GZ_SUFFIX ".gz" 102 103 #define BUFLEN (64 * 1024) 104 105 #define GZIP_MAGIC0 0x1F 106 #define GZIP_MAGIC1 0x8B 107 #define GZIP_OMAGIC1 0x9E 108 109 #define GZIP_TIMESTAMP (off_t)4 110 #define GZIP_ORIGNAME (off_t)10 111 112 #define HEAD_CRC 0x02 113 #define EXTRA_FIELD 0x04 114 #define ORIG_NAME 0x08 115 #define COMMENT 0x10 116 117 #define OS_CODE 3 /* Unix */ 118 119 typedef struct { 120 const char *zipped; 121 int ziplen; 122 const char *normal; /* for unzip - must not be longer than zipped */ 123 } suffixes_t; 124 static suffixes_t suffixes[] = { 125 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N} 126 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */ 127 #ifndef SMALL 128 SUFFIX(GZ_SUFFIX, ""), 129 SUFFIX(".z", ""), 130 SUFFIX("-gz", ""), 131 SUFFIX("-z", ""), 132 SUFFIX("_z", ""), 133 SUFFIX(".taz", ".tar"), 134 SUFFIX(".tgz", ".tar"), 135 #ifndef NO_BZIP2_SUPPORT 136 SUFFIX(BZ2_SUFFIX, ""), 137 #endif 138 #ifndef NO_COMPRESS_SUPPORT 139 SUFFIX(Z_SUFFIX, ""), 140 #endif 141 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */ 142 #endif /* SMALL */ 143 #undef SUFFIX 144 }; 145 #define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0]) 146 147 #define SUFFIX_MAXLEN 30 148 149 static const char gzip_version[] = "NetBSD gzip 20060927"; 150 151 static int cflag; /* stdout mode */ 152 static int dflag; /* decompress mode */ 153 static int lflag; /* list mode */ 154 static int numflag = 6; /* gzip -1..-9 value */ 155 156 #ifndef SMALL 157 static int fflag; /* force mode */ 158 static int kflag; /* don't delete input files */ 159 static int nflag; /* don't save name/timestamp */ 160 static int Nflag; /* don't restore name/timestamp */ 161 static int qflag; /* quiet mode */ 162 static int rflag; /* recursive mode */ 163 static int tflag; /* test */ 164 static int vflag; /* verbose mode */ 165 #else 166 #define qflag 0 167 #define tflag 0 168 #endif 169 170 static int exit_value = 0; /* exit value */ 171 172 static char *infile; /* name of file coming in */ 173 174 static void maybe_err(const char *fmt, ...) 175 __attribute__((__format__(__printf__, 1, 2))); 176 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) 177 static void maybe_errx(const char *fmt, ...) 178 __attribute__((__format__(__printf__, 1, 2))); 179 #endif 180 static void maybe_warn(const char *fmt, ...) 181 __attribute__((__format__(__printf__, 1, 2))); 182 static void maybe_warnx(const char *fmt, ...) 183 __attribute__((__format__(__printf__, 1, 2))); 184 static enum filetype file_gettype(u_char *); 185 #ifdef SMALL 186 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz) 187 #endif 188 static off_t gz_compress(int, int, off_t *, const char *, uint32_t); 189 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *); 190 static off_t file_compress(char *, char *, size_t); 191 static off_t file_uncompress(char *, char *, size_t); 192 static void handle_pathname(char *); 193 static void handle_file(char *, struct stat *); 194 static void handle_stdin(void); 195 static void handle_stdout(void); 196 static void print_ratio(off_t, off_t, FILE *); 197 static void print_list(int fd, off_t, const char *, time_t); 198 static void usage(void); 199 static void display_version(void); 200 static const suffixes_t *check_suffix(char *, int); 201 static ssize_t read_retry(int, void *, size_t); 202 203 #ifdef SMALL 204 #define unlink_input(f, sb) unlink(f) 205 #else 206 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd); 207 static void prepend_gzip(char *, int *, char ***); 208 static void handle_dir(char *); 209 static void print_verbage(const char *, const char *, off_t, off_t); 210 static void print_test(const char *, int); 211 static void copymodes(int fd, const struct stat *, const char *file); 212 static int check_outfile(const char *outfile); 213 #endif 214 215 #ifndef NO_BZIP2_SUPPORT 216 static off_t unbzip2(int, int, char *, size_t, off_t *); 217 #endif 218 219 #ifndef NO_COMPRESS_SUPPORT 220 static FILE *zdopen(int); 221 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *); 222 #endif 223 224 #ifndef NO_PACK_SUPPORT 225 static off_t unpack(int, int, char *, size_t, off_t *); 226 #endif 227 228 int main(int, char *p[]); 229 230 #ifdef SMALL 231 #define getopt_long(a,b,c,d,e) getopt(a,b,c) 232 #else 233 static const struct option longopts[] = { 234 { "stdout", no_argument, 0, 'c' }, 235 { "to-stdout", no_argument, 0, 'c' }, 236 { "decompress", no_argument, 0, 'd' }, 237 { "uncompress", no_argument, 0, 'd' }, 238 { "force", no_argument, 0, 'f' }, 239 { "help", no_argument, 0, 'h' }, 240 { "keep", no_argument, 0, 'k' }, 241 { "list", no_argument, 0, 'l' }, 242 { "no-name", no_argument, 0, 'n' }, 243 { "name", no_argument, 0, 'N' }, 244 { "quiet", no_argument, 0, 'q' }, 245 { "recursive", no_argument, 0, 'r' }, 246 { "suffix", required_argument, 0, 'S' }, 247 { "test", no_argument, 0, 't' }, 248 { "verbose", no_argument, 0, 'v' }, 249 { "version", no_argument, 0, 'V' }, 250 { "fast", no_argument, 0, '1' }, 251 { "best", no_argument, 0, '9' }, 252 #if 0 253 /* 254 * This is what else GNU gzip implements. --ascii isn't useful 255 * on NetBSD, and I don't care to have a --license. 256 */ 257 { "ascii", no_argument, 0, 'a' }, 258 { "license", no_argument, 0, 'L' }, 259 #endif 260 { NULL, no_argument, 0, 0 }, 261 }; 262 #endif 263 264 int 265 main(int argc, char **argv) 266 { 267 const char *progname = getprogname(); 268 #ifndef SMALL 269 char *gzip; 270 int len; 271 #endif 272 int ch; 273 274 /* XXX set up signals */ 275 276 #ifndef SMALL 277 if ((gzip = getenv("GZIP")) != NULL) 278 prepend_gzip(gzip, &argc, &argv); 279 #endif 280 281 /* 282 * XXX 283 * handle being called `gunzip', `zcat' and `gzcat' 284 */ 285 if (strcmp(progname, "gunzip") == 0) 286 dflag = 1; 287 else if (strcmp(progname, "zcat") == 0 || 288 strcmp(progname, "gzcat") == 0) 289 dflag = cflag = 1; 290 291 #ifdef SMALL 292 #define OPT_LIST "123456789cdhltV" 293 #else 294 #define OPT_LIST "123456789cdfhklNnqrS:tVv" 295 #endif 296 297 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) { 298 switch (ch) { 299 case '1': case '2': case '3': 300 case '4': case '5': case '6': 301 case '7': case '8': case '9': 302 numflag = ch - '0'; 303 break; 304 case 'c': 305 cflag = 1; 306 break; 307 case 'd': 308 dflag = 1; 309 break; 310 case 'l': 311 lflag = 1; 312 dflag = 1; 313 break; 314 case 'V': 315 display_version(); 316 /* NOTREACHED */ 317 #ifndef SMALL 318 case 'f': 319 fflag = 1; 320 break; 321 case 'k': 322 kflag = 1; 323 break; 324 case 'N': 325 nflag = 0; 326 Nflag = 1; 327 break; 328 case 'n': 329 nflag = 1; 330 Nflag = 0; 331 break; 332 case 'q': 333 qflag = 1; 334 break; 335 case 'r': 336 rflag = 1; 337 break; 338 case 'S': 339 len = strlen(optarg); 340 if (len != 0) { 341 if (len >= SUFFIX_MAXLEN) 342 errx(1, "incorrect suffix: '%s'", optarg); 343 suffixes[0].zipped = optarg; 344 suffixes[0].ziplen = len; 345 } else { 346 suffixes[NUM_SUFFIXES - 1].zipped = ""; 347 suffixes[NUM_SUFFIXES - 1].ziplen = 0; 348 } 349 break; 350 case 't': 351 cflag = 1; 352 tflag = 1; 353 dflag = 1; 354 break; 355 case 'v': 356 vflag = 1; 357 break; 358 #endif 359 default: 360 usage(); 361 /* NOTREACHED */ 362 } 363 } 364 argv += optind; 365 argc -= optind; 366 367 if (argc == 0) { 368 if (dflag) /* stdin mode */ 369 handle_stdin(); 370 else /* stdout mode */ 371 handle_stdout(); 372 } else { 373 do { 374 handle_pathname(argv[0]); 375 } while (*++argv); 376 } 377 #ifndef SMALL 378 if (qflag == 0 && lflag && argc > 1) 379 print_list(-1, 0, "(totals)", 0); 380 #endif 381 exit(exit_value); 382 } 383 384 /* maybe print a warning */ 385 void 386 maybe_warn(const char *fmt, ...) 387 { 388 va_list ap; 389 390 if (qflag == 0) { 391 va_start(ap, fmt); 392 vwarn(fmt, ap); 393 va_end(ap); 394 } 395 if (exit_value == 0) 396 exit_value = 1; 397 } 398 399 /* ... without an errno. */ 400 void 401 maybe_warnx(const char *fmt, ...) 402 { 403 va_list ap; 404 405 if (qflag == 0) { 406 va_start(ap, fmt); 407 vwarnx(fmt, ap); 408 va_end(ap); 409 } 410 if (exit_value == 0) 411 exit_value = 1; 412 } 413 414 /* maybe print an error */ 415 void 416 maybe_err(const char *fmt, ...) 417 { 418 va_list ap; 419 420 if (qflag == 0) { 421 va_start(ap, fmt); 422 vwarn(fmt, ap); 423 va_end(ap); 424 } 425 exit(2); 426 } 427 428 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) 429 /* ... without an errno. */ 430 void 431 maybe_errx(const char *fmt, ...) 432 { 433 va_list ap; 434 435 if (qflag == 0) { 436 va_start(ap, fmt); 437 vwarnx(fmt, ap); 438 va_end(ap); 439 } 440 exit(2); 441 } 442 #endif 443 444 #ifndef SMALL 445 /* split up $GZIP and prepend it to the argument list */ 446 static void 447 prepend_gzip(char *gzip, int *argc, char ***argv) 448 { 449 char *s, **nargv, **ac; 450 int nenvarg = 0, i; 451 452 /* scan how many arguments there are */ 453 for (s = gzip;;) { 454 while (*s == ' ' || *s == '\t') 455 s++; 456 if (*s == 0) 457 goto count_done; 458 nenvarg++; 459 while (*s != ' ' && *s != '\t') 460 if (*s++ == 0) 461 goto count_done; 462 } 463 count_done: 464 /* punt early */ 465 if (nenvarg == 0) 466 return; 467 468 *argc += nenvarg; 469 ac = *argv; 470 471 nargv = (char **)malloc((*argc + 1) * sizeof(char *)); 472 if (nargv == NULL) 473 maybe_err("malloc"); 474 475 /* stash this away */ 476 *argv = nargv; 477 478 /* copy the program name first */ 479 i = 0; 480 nargv[i++] = *(ac++); 481 482 /* take a copy of $GZIP and add it to the array */ 483 s = strdup(gzip); 484 if (s == NULL) 485 maybe_err("strdup"); 486 for (;;) { 487 /* Skip whitespaces. */ 488 while (*s == ' ' || *s == '\t') 489 s++; 490 if (*s == 0) 491 goto copy_done; 492 nargv[i++] = s; 493 /* Find the end of this argument. */ 494 while (*s != ' ' && *s != '\t') 495 if (*s++ == 0) 496 /* Argument followed by NUL. */ 497 goto copy_done; 498 /* Terminate by overwriting ' ' or '\t' with NUL. */ 499 *s++ = 0; 500 } 501 copy_done: 502 503 /* copy the original arguments and a NULL */ 504 while (*ac) 505 nargv[i++] = *(ac++); 506 nargv[i] = NULL; 507 } 508 #endif 509 510 /* compress input to output. Return bytes read, -1 on error */ 511 static off_t 512 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime) 513 { 514 z_stream z; 515 char *outbufp, *inbufp; 516 off_t in_tot = 0, out_tot = 0; 517 ssize_t in_size; 518 int i, error; 519 uLong crc; 520 #ifdef SMALL 521 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0, 522 0, 0, 0, 0, 523 0, OS_CODE }; 524 #endif 525 526 outbufp = malloc(BUFLEN); 527 inbufp = malloc(BUFLEN); 528 if (outbufp == NULL || inbufp == NULL) { 529 maybe_err("malloc failed"); 530 goto out; 531 } 532 533 memset(&z, 0, sizeof z); 534 z.zalloc = Z_NULL; 535 z.zfree = Z_NULL; 536 z.opaque = 0; 537 538 #ifdef SMALL 539 memcpy(outbufp, header, sizeof header); 540 i = sizeof header; 541 #else 542 if (nflag != 0) { 543 mtime = 0; 544 origname = ""; 545 } 546 547 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s", 548 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 549 *origname ? ORIG_NAME : 0, 550 mtime & 0xff, 551 (mtime >> 8) & 0xff, 552 (mtime >> 16) & 0xff, 553 (mtime >> 24) & 0xff, 554 numflag == 1 ? 4 : numflag == 9 ? 2 : 0, 555 OS_CODE, origname); 556 if (i >= BUFLEN) 557 /* this need PATH_MAX > BUFLEN ... */ 558 maybe_err("snprintf"); 559 if (*origname) 560 i++; 561 #endif 562 563 z.next_out = outbufp + i; 564 z.avail_out = BUFLEN - i; 565 566 error = deflateInit2(&z, numflag, Z_DEFLATED, 567 (-MAX_WBITS), 8, Z_DEFAULT_STRATEGY); 568 if (error != Z_OK) { 569 maybe_warnx("deflateInit2 failed"); 570 in_tot = -1; 571 goto out; 572 } 573 574 crc = crc32(0L, Z_NULL, 0); 575 for (;;) { 576 if (z.avail_out == 0) { 577 if (write(out, outbufp, BUFLEN) != BUFLEN) { 578 maybe_warn("write"); 579 out_tot = -1; 580 goto out; 581 } 582 583 out_tot += BUFLEN; 584 z.next_out = outbufp; 585 z.avail_out = BUFLEN; 586 } 587 588 if (z.avail_in == 0) { 589 in_size = read(in, inbufp, BUFLEN); 590 if (in_size < 0) { 591 maybe_warn("read"); 592 in_tot = -1; 593 goto out; 594 } 595 if (in_size == 0) 596 break; 597 598 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size); 599 in_tot += in_size; 600 z.next_in = inbufp; 601 z.avail_in = in_size; 602 } 603 604 error = deflate(&z, Z_NO_FLUSH); 605 if (error != Z_OK && error != Z_STREAM_END) { 606 maybe_warnx("deflate failed"); 607 in_tot = -1; 608 goto out; 609 } 610 } 611 612 /* clean up */ 613 for (;;) { 614 size_t len; 615 ssize_t w; 616 617 error = deflate(&z, Z_FINISH); 618 if (error != Z_OK && error != Z_STREAM_END) { 619 maybe_warnx("deflate failed"); 620 in_tot = -1; 621 goto out; 622 } 623 624 len = (char *)z.next_out - outbufp; 625 626 w = write(out, outbufp, len); 627 if (w == -1 || (size_t)w != len) { 628 maybe_warn("write"); 629 out_tot = -1; 630 goto out; 631 } 632 out_tot += len; 633 z.next_out = outbufp; 634 z.avail_out = BUFLEN; 635 636 if (error == Z_STREAM_END) 637 break; 638 } 639 640 if (deflateEnd(&z) != Z_OK) { 641 maybe_warnx("deflateEnd failed"); 642 in_tot = -1; 643 goto out; 644 } 645 646 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c", 647 (int)crc & 0xff, 648 (int)(crc >> 8) & 0xff, 649 (int)(crc >> 16) & 0xff, 650 (int)(crc >> 24) & 0xff, 651 (int)in_tot & 0xff, 652 (int)(in_tot >> 8) & 0xff, 653 (int)(in_tot >> 16) & 0xff, 654 (int)(in_tot >> 24) & 0xff); 655 if (i != 8) 656 maybe_err("snprintf"); 657 #if 0 658 if (in_tot > 0xffffffff) 659 maybe_warn("input file size >= 4GB cannot be saved"); 660 #endif 661 if (write(out, outbufp, i) != i) { 662 maybe_warn("write"); 663 in_tot = -1; 664 } else 665 out_tot += i; 666 667 out: 668 if (inbufp != NULL) 669 free(inbufp); 670 if (outbufp != NULL) 671 free(outbufp); 672 if (gsizep) 673 *gsizep = out_tot; 674 return in_tot; 675 } 676 677 /* 678 * uncompress input to output then close the input. return the 679 * uncompressed size written, and put the compressed sized read 680 * into `*gsizep'. 681 */ 682 static off_t 683 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep, 684 const char *filename) 685 { 686 z_stream z; 687 char *outbufp, *inbufp; 688 off_t out_tot = -1, in_tot = 0; 689 uint32_t out_sub_tot = 0; 690 enum { 691 GZSTATE_MAGIC0, 692 GZSTATE_MAGIC1, 693 GZSTATE_METHOD, 694 GZSTATE_FLAGS, 695 GZSTATE_SKIPPING, 696 GZSTATE_EXTRA, 697 GZSTATE_EXTRA2, 698 GZSTATE_EXTRA3, 699 GZSTATE_ORIGNAME, 700 GZSTATE_COMMENT, 701 GZSTATE_HEAD_CRC1, 702 GZSTATE_HEAD_CRC2, 703 GZSTATE_INIT, 704 GZSTATE_READ, 705 GZSTATE_CRC, 706 GZSTATE_LEN, 707 } state = GZSTATE_MAGIC0; 708 int flags = 0, skip_count = 0; 709 int error = Z_STREAM_ERROR, done_reading = 0; 710 uLong crc = 0; 711 ssize_t wr; 712 int needmore = 0; 713 714 #define ADVANCE() { z.next_in++; z.avail_in--; } 715 716 if ((outbufp = malloc(BUFLEN)) == NULL) { 717 maybe_err("malloc failed"); 718 goto out2; 719 } 720 if ((inbufp = malloc(BUFLEN)) == NULL) { 721 maybe_err("malloc failed"); 722 goto out1; 723 } 724 725 memset(&z, 0, sizeof z); 726 z.avail_in = prelen; 727 z.next_in = pre; 728 z.avail_out = BUFLEN; 729 z.next_out = outbufp; 730 z.zalloc = NULL; 731 z.zfree = NULL; 732 z.opaque = 0; 733 734 in_tot = prelen; 735 out_tot = 0; 736 737 for (;;) { 738 if ((z.avail_in == 0 || needmore) && done_reading == 0) { 739 ssize_t in_size; 740 741 if (z.avail_in > 0) { 742 memmove(inbufp, z.next_in, z.avail_in); 743 } 744 z.next_in = inbufp; 745 in_size = read(in, z.next_in + z.avail_in, 746 BUFLEN - z.avail_in); 747 748 if (in_size == -1) { 749 maybe_warn("failed to read stdin"); 750 goto stop_and_fail; 751 } else if (in_size == 0) { 752 done_reading = 1; 753 } 754 755 z.avail_in += in_size; 756 needmore = 0; 757 758 in_tot += in_size; 759 } 760 if (z.avail_in == 0) { 761 if (done_reading && state != GZSTATE_MAGIC0) { 762 maybe_warnx("%s: unexpected end of file", 763 filename); 764 goto stop_and_fail; 765 } 766 goto stop; 767 } 768 switch (state) { 769 case GZSTATE_MAGIC0: 770 if (*z.next_in != GZIP_MAGIC0) { 771 if (in_tot > 0) { 772 maybe_warnx("%s: trailing garbage " 773 "ignored", filename); 774 goto stop; 775 } 776 maybe_warnx("input not gziped (MAGIC0)"); 777 goto stop_and_fail; 778 } 779 ADVANCE(); 780 state++; 781 out_sub_tot = 0; 782 crc = crc32(0L, Z_NULL, 0); 783 break; 784 785 case GZSTATE_MAGIC1: 786 if (*z.next_in != GZIP_MAGIC1 && 787 *z.next_in != GZIP_OMAGIC1) { 788 maybe_warnx("input not gziped (MAGIC1)"); 789 goto stop_and_fail; 790 } 791 ADVANCE(); 792 state++; 793 break; 794 795 case GZSTATE_METHOD: 796 if (*z.next_in != Z_DEFLATED) { 797 maybe_warnx("unknown compression method"); 798 goto stop_and_fail; 799 } 800 ADVANCE(); 801 state++; 802 break; 803 804 case GZSTATE_FLAGS: 805 flags = *z.next_in; 806 ADVANCE(); 807 skip_count = 6; 808 state++; 809 break; 810 811 case GZSTATE_SKIPPING: 812 if (skip_count > 0) { 813 skip_count--; 814 ADVANCE(); 815 } else 816 state++; 817 break; 818 819 case GZSTATE_EXTRA: 820 if ((flags & EXTRA_FIELD) == 0) { 821 state = GZSTATE_ORIGNAME; 822 break; 823 } 824 skip_count = *z.next_in; 825 ADVANCE(); 826 state++; 827 break; 828 829 case GZSTATE_EXTRA2: 830 skip_count |= ((*z.next_in) << 8); 831 ADVANCE(); 832 state++; 833 break; 834 835 case GZSTATE_EXTRA3: 836 if (skip_count > 0) { 837 skip_count--; 838 ADVANCE(); 839 } else 840 state++; 841 break; 842 843 case GZSTATE_ORIGNAME: 844 if ((flags & ORIG_NAME) == 0) { 845 state++; 846 break; 847 } 848 if (*z.next_in == 0) 849 state++; 850 ADVANCE(); 851 break; 852 853 case GZSTATE_COMMENT: 854 if ((flags & COMMENT) == 0) { 855 state++; 856 break; 857 } 858 if (*z.next_in == 0) 859 state++; 860 ADVANCE(); 861 break; 862 863 case GZSTATE_HEAD_CRC1: 864 if (flags & HEAD_CRC) 865 skip_count = 2; 866 else 867 skip_count = 0; 868 state++; 869 break; 870 871 case GZSTATE_HEAD_CRC2: 872 if (skip_count > 0) { 873 skip_count--; 874 ADVANCE(); 875 } else 876 state++; 877 break; 878 879 case GZSTATE_INIT: 880 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) { 881 maybe_warnx("failed to inflateInit"); 882 goto stop_and_fail; 883 } 884 state++; 885 break; 886 887 case GZSTATE_READ: 888 error = inflate(&z, Z_FINISH); 889 switch (error) { 890 /* Z_BUF_ERROR goes with Z_FINISH... */ 891 case Z_BUF_ERROR: 892 if (z.avail_out > 0 && !done_reading) 893 continue; 894 case Z_STREAM_END: 895 case Z_OK: 896 break; 897 898 case Z_NEED_DICT: 899 maybe_warnx("Z_NEED_DICT error"); 900 goto stop_and_fail; 901 case Z_DATA_ERROR: 902 maybe_warnx("data stream error"); 903 goto stop_and_fail; 904 case Z_STREAM_ERROR: 905 maybe_warnx("internal stream error"); 906 goto stop_and_fail; 907 case Z_MEM_ERROR: 908 maybe_warnx("memory allocation error"); 909 goto stop_and_fail; 910 911 default: 912 maybe_warn("unknown error from inflate(): %d", 913 error); 914 } 915 wr = BUFLEN - z.avail_out; 916 917 if (wr != 0) { 918 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 919 if ( 920 #ifndef SMALL 921 /* don't write anything with -t */ 922 tflag == 0 && 923 #endif 924 write(out, outbufp, wr) != wr) { 925 maybe_warn("error writing to output"); 926 goto stop_and_fail; 927 } 928 929 out_tot += wr; 930 out_sub_tot += wr; 931 } 932 933 if (error == Z_STREAM_END) { 934 inflateEnd(&z); 935 state++; 936 } 937 938 z.next_out = outbufp; 939 z.avail_out = BUFLEN; 940 941 break; 942 case GZSTATE_CRC: 943 { 944 uLong origcrc; 945 946 if (z.avail_in < 4) { 947 if (!done_reading) { 948 needmore = 1; 949 continue; 950 } 951 maybe_warnx("truncated input"); 952 goto stop_and_fail; 953 } 954 origcrc = ((unsigned)z.next_in[0] & 0xff) | 955 ((unsigned)z.next_in[1] & 0xff) << 8 | 956 ((unsigned)z.next_in[2] & 0xff) << 16 | 957 ((unsigned)z.next_in[3] & 0xff) << 24; 958 if (origcrc != crc) { 959 maybe_warnx("invalid compressed" 960 " data--crc error"); 961 goto stop_and_fail; 962 } 963 } 964 965 z.avail_in -= 4; 966 z.next_in += 4; 967 968 if (!z.avail_in && done_reading) { 969 goto stop; 970 } 971 state++; 972 break; 973 case GZSTATE_LEN: 974 { 975 uLong origlen; 976 977 if (z.avail_in < 4) { 978 if (!done_reading) { 979 needmore = 1; 980 continue; 981 } 982 maybe_warnx("truncated input"); 983 goto stop_and_fail; 984 } 985 origlen = ((unsigned)z.next_in[0] & 0xff) | 986 ((unsigned)z.next_in[1] & 0xff) << 8 | 987 ((unsigned)z.next_in[2] & 0xff) << 16 | 988 ((unsigned)z.next_in[3] & 0xff) << 24; 989 990 if (origlen != out_sub_tot) { 991 maybe_warnx("invalid compressed" 992 " data--length error"); 993 goto stop_and_fail; 994 } 995 } 996 997 z.avail_in -= 4; 998 z.next_in += 4; 999 1000 if (error < 0) { 1001 maybe_warnx("decompression error"); 1002 goto stop_and_fail; 1003 } 1004 state = GZSTATE_MAGIC0; 1005 break; 1006 } 1007 continue; 1008 stop_and_fail: 1009 out_tot = -1; 1010 stop: 1011 break; 1012 } 1013 if (state > GZSTATE_INIT) 1014 inflateEnd(&z); 1015 1016 free(inbufp); 1017 out1: 1018 free(outbufp); 1019 out2: 1020 if (gsizep) 1021 *gsizep = in_tot; 1022 return (out_tot); 1023 } 1024 1025 #ifndef SMALL 1026 /* 1027 * set the owner, mode, flags & utimes using the given file descriptor. 1028 * file is only used in possible warning messages. 1029 */ 1030 static void 1031 copymodes(int fd, const struct stat *sbp, const char *file) 1032 { 1033 struct timeval times[2]; 1034 struct stat sb; 1035 1036 /* 1037 * If we have no info on the input, give this file some 1038 * default values and return.. 1039 */ 1040 if (sbp == NULL) { 1041 mode_t mask = umask(022); 1042 1043 (void)fchmod(fd, DEFFILEMODE & ~mask); 1044 (void)umask(mask); 1045 return; 1046 } 1047 sb = *sbp; 1048 1049 /* if the chown fails, remove set-id bits as-per compress(1) */ 1050 if (fchown(fd, sb.st_uid, sb.st_gid) < 0) { 1051 if (errno != EPERM) 1052 maybe_warn("couldn't fchown: %s", file); 1053 sb.st_mode &= ~(S_ISUID|S_ISGID); 1054 } 1055 1056 /* we only allow set-id and the 9 normal permission bits */ 1057 sb.st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1058 if (fchmod(fd, sb.st_mode) < 0) 1059 maybe_warn("couldn't fchmod: %s", file); 1060 1061 /* only try flags if they exist already */ 1062 if (sb.st_flags != 0 && fchflags(fd, sb.st_flags) < 0) 1063 maybe_warn("couldn't fchflags: %s", file); 1064 1065 TIMESPEC_TO_TIMEVAL(×[0], &sb.st_atimespec); 1066 TIMESPEC_TO_TIMEVAL(×[1], &sb.st_mtimespec); 1067 if (futimes(fd, times) < 0) 1068 maybe_warn("couldn't utimes: %s", file); 1069 } 1070 #endif 1071 1072 /* what sort of file is this? */ 1073 static enum filetype 1074 file_gettype(u_char *buf) 1075 { 1076 1077 if (buf[0] == GZIP_MAGIC0 && 1078 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1079 return FT_GZIP; 1080 else 1081 #ifndef NO_BZIP2_SUPPORT 1082 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1083 buf[3] >= '0' && buf[3] <= '9') 1084 return FT_BZIP2; 1085 else 1086 #endif 1087 #ifndef NO_COMPRESS_SUPPORT 1088 if (memcmp(buf, Z_MAGIC, 2) == 0) 1089 return FT_Z; 1090 else 1091 #endif 1092 #ifndef NO_PACK_SUPPORT 1093 if (memcmp(buf, PACK_MAGIC, 2) == 0) 1094 return FT_PACK; 1095 else 1096 #endif 1097 return FT_UNKNOWN; 1098 } 1099 1100 #ifndef SMALL 1101 /* check the outfile is OK. */ 1102 static int 1103 check_outfile(const char *outfile) 1104 { 1105 struct stat sb; 1106 int ok = 1; 1107 1108 if (lflag == 0 && stat(outfile, &sb) == 0) { 1109 if (fflag) 1110 unlink(outfile); 1111 else if (isatty(STDIN_FILENO)) { 1112 char ans[10] = { 'n', '\0' }; /* default */ 1113 1114 fprintf(stderr, "%s already exists -- do you wish to " 1115 "overwrite (y or n)? " , outfile); 1116 (void)fgets(ans, sizeof(ans) - 1, stdin); 1117 if (ans[0] != 'y' && ans[0] != 'Y') { 1118 fprintf(stderr, "\tnot overwriting\n"); 1119 ok = 0; 1120 } else 1121 unlink(outfile); 1122 } else { 1123 maybe_warnx("%s already exists -- skipping", outfile); 1124 ok = 0; 1125 } 1126 } 1127 return ok; 1128 } 1129 1130 static void 1131 unlink_input(const char *file, const struct stat *sb) 1132 { 1133 struct stat nsb; 1134 1135 if (kflag) 1136 return; 1137 if (stat(file, &nsb) != 0) 1138 /* Must be gone alrady */ 1139 return; 1140 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1141 /* Definitely a different file */ 1142 return; 1143 unlink(file); 1144 } 1145 #endif 1146 1147 static const suffixes_t * 1148 check_suffix(char *file, int xlate) 1149 { 1150 const suffixes_t *s; 1151 int len = strlen(file); 1152 char *sp; 1153 1154 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1155 /* if it doesn't fit in "a.suf", don't bother */ 1156 if (s->ziplen >= len) 1157 continue; 1158 sp = file + len - s->ziplen; 1159 if (strcmp(s->zipped, sp) != 0) 1160 continue; 1161 if (xlate) 1162 strcpy(sp, s->normal); 1163 return s; 1164 } 1165 return NULL; 1166 } 1167 1168 /* 1169 * compress the given file: create a corresponding .gz file and remove the 1170 * original. 1171 */ 1172 static off_t 1173 file_compress(char *file, char *outfile, size_t outsize) 1174 { 1175 int in; 1176 int out; 1177 off_t size, insize; 1178 #ifndef SMALL 1179 struct stat isb, osb; 1180 const suffixes_t *suff; 1181 #endif 1182 1183 in = open(file, O_RDONLY); 1184 if (in == -1) { 1185 maybe_warn("can't open %s", file); 1186 return -1; 1187 } 1188 1189 if (cflag == 0) { 1190 #ifndef SMALL 1191 if (fstat(in, &isb) == 0) { 1192 if (isb.st_nlink > 1 && fflag == 0) { 1193 maybe_warnx("%s has %d other link%s -- " 1194 "skipping", file, isb.st_nlink - 1, 1195 isb.st_nlink == 1 ? "" : "s"); 1196 close(in); 1197 return -1; 1198 } 1199 } 1200 1201 if (fflag == 0 && (suff = check_suffix(file, 0)) 1202 && suff->zipped[0] != 0) { 1203 maybe_warnx("%s already has %s suffix -- unchanged", 1204 file, suff->zipped); 1205 close(in); 1206 return -1; 1207 } 1208 #endif 1209 1210 /* Add (usually) .gz to filename */ 1211 if ((size_t)snprintf(outfile, outsize, "%s%s", 1212 file, suffixes[0].zipped) >= outsize) { 1213 errx(1, "file path too long: %s", file); 1214 } 1215 #ifndef SMALL 1216 if (check_outfile(outfile) == 0) { 1217 close(in); 1218 return -1; 1219 } 1220 #endif 1221 } 1222 1223 if (cflag == 0) { 1224 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600); 1225 if (out == -1) { 1226 maybe_warn("could not create output: %s", outfile); 1227 fclose(stdin); 1228 return -1; 1229 } 1230 } else 1231 out = STDOUT_FILENO; 1232 1233 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1234 1235 (void)close(in); 1236 1237 /* 1238 * If there was an error, insize will be -1. 1239 * If we compressed to stdout, just return the size. 1240 * Otherwise stat the file and check it is the correct size. 1241 * We only blow away the file if we can stat the output and it 1242 * has the expected size. 1243 */ 1244 if (cflag != 0) 1245 return insize == -1 ? -1 : size; 1246 1247 #ifndef SMALL 1248 if (fstat(out, &osb) != 0) { 1249 maybe_warn("couldn't stat: %s", outfile); 1250 goto bad_outfile; 1251 } 1252 1253 if (osb.st_size != size) { 1254 maybe_warnx("output file: %s wrong size (%" PRIdOFF 1255 " != %" PRIdOFF "), deleting", 1256 outfile, osb.st_size, size); 1257 goto bad_outfile; 1258 } 1259 1260 copymodes(out, &isb, outfile); 1261 #endif 1262 if (close(out) == -1) 1263 maybe_warn("couldn't close output"); 1264 1265 /* output is good, ok to delete input */ 1266 unlink_input(file, &isb); 1267 return size; 1268 1269 #ifndef SMALL 1270 bad_outfile: 1271 if (close(out) == -1) 1272 maybe_warn("couldn't close output"); 1273 1274 maybe_warnx("leaving original %s", file); 1275 unlink(outfile); 1276 return size; 1277 #endif 1278 } 1279 1280 /* uncompress the given file and remove the original */ 1281 static off_t 1282 file_uncompress(char *file, char *outfile, size_t outsize) 1283 { 1284 struct stat isb, osb; 1285 off_t size; 1286 ssize_t rbytes; 1287 unsigned char header1[4]; 1288 enum filetype method; 1289 int fd, ofd, zfd = -1; 1290 #ifndef SMALL 1291 ssize_t rv; 1292 time_t timestamp = 0; 1293 unsigned char name[PATH_MAX + 1]; 1294 #endif 1295 1296 /* gather the old name info */ 1297 1298 fd = open(file, O_RDONLY); 1299 if (fd < 0) { 1300 maybe_warn("can't open %s", file); 1301 goto lose; 1302 } 1303 1304 if ((size_t)snprintf(outfile, outsize, "%s", file) >= outsize) 1305 errx(1, "file path too long: %s", file); 1306 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1307 maybe_warnx("%s: unknown suffix -- ignored", file); 1308 goto lose; 1309 } 1310 1311 rbytes = read(fd, header1, sizeof header1); 1312 if (rbytes != sizeof header1) { 1313 /* we don't want to fail here. */ 1314 #ifndef SMALL 1315 if (fflag) 1316 goto lose; 1317 #endif 1318 if (rbytes == -1) 1319 maybe_warn("can't read %s", file); 1320 else 1321 goto unexpected_EOF; 1322 goto lose; 1323 } 1324 1325 method = file_gettype(header1); 1326 1327 #ifndef SMALL 1328 if (fflag == 0 && method == FT_UNKNOWN) { 1329 maybe_warnx("%s: not in gzip format", file); 1330 goto lose; 1331 } 1332 1333 #endif 1334 1335 #ifndef SMALL 1336 if (method == FT_GZIP && Nflag) { 1337 unsigned char ts[4]; /* timestamp */ 1338 1339 rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP); 1340 if (rv >= 0 && rv < (ssize_t)(sizeof ts)) 1341 goto unexpected_EOF; 1342 if (rv == -1) { 1343 if (!fflag) 1344 maybe_warn("can't read %s", file); 1345 goto lose; 1346 } 1347 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0]; 1348 1349 if (header1[3] & ORIG_NAME) { 1350 rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME); 1351 if (rbytes < 0) { 1352 maybe_warn("can't read %s", file); 1353 goto lose; 1354 } 1355 if (name[0] != 0) { 1356 /* preserve original directory name */ 1357 char *dp = strrchr(file, '/'); 1358 if (dp == NULL) 1359 dp = file; 1360 else 1361 dp++; 1362 snprintf(outfile, outsize, "%.*s%.*s", 1363 (int) (dp - file), 1364 file, (int) rbytes, name); 1365 } 1366 } 1367 } 1368 #endif 1369 lseek(fd, 0, SEEK_SET); 1370 1371 if (cflag == 0 || lflag) { 1372 if (fstat(fd, &isb) != 0) 1373 goto lose; 1374 #ifndef SMALL 1375 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1376 maybe_warnx("%s has %d other links -- skipping", 1377 file, isb.st_nlink - 1); 1378 goto lose; 1379 } 1380 if (nflag == 0 && timestamp) 1381 isb.st_mtime = timestamp; 1382 if (check_outfile(outfile) == 0) 1383 goto lose; 1384 #endif 1385 } 1386 1387 if (cflag == 0 && lflag == 0) { 1388 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1389 if (zfd == STDOUT_FILENO) { 1390 /* We won't close STDOUT_FILENO later... */ 1391 zfd = dup(zfd); 1392 close(STDOUT_FILENO); 1393 } 1394 if (zfd == -1) { 1395 maybe_warn("can't open %s", outfile); 1396 goto lose; 1397 } 1398 } else 1399 zfd = STDOUT_FILENO; 1400 1401 #ifndef NO_BZIP2_SUPPORT 1402 if (method == FT_BZIP2) { 1403 1404 /* XXX */ 1405 if (lflag) { 1406 maybe_warnx("no -l with bzip2 files"); 1407 goto lose; 1408 } 1409 1410 size = unbzip2(fd, zfd, NULL, 0, NULL); 1411 } else 1412 #endif 1413 1414 #ifndef NO_COMPRESS_SUPPORT 1415 if (method == FT_Z) { 1416 FILE *in, *out; 1417 1418 /* XXX */ 1419 if (lflag) { 1420 maybe_warnx("no -l with Lempel-Ziv files"); 1421 goto lose; 1422 } 1423 1424 if ((in = zdopen(fd)) == NULL) { 1425 maybe_warn("zdopen for read: %s", file); 1426 goto lose; 1427 } 1428 1429 out = fdopen(dup(zfd), "w"); 1430 if (out == NULL) { 1431 maybe_warn("fdopen for write: %s", outfile); 1432 fclose(in); 1433 goto lose; 1434 } 1435 1436 size = zuncompress(in, out, NULL, 0, NULL); 1437 /* need to fclose() if ferror() is true... */ 1438 if (ferror(in) | fclose(in)) { 1439 maybe_warn("failed infile fclose"); 1440 unlink(outfile); 1441 (void)fclose(out); 1442 } 1443 if (fclose(out) != 0) { 1444 maybe_warn("failed outfile fclose"); 1445 unlink(outfile); 1446 goto lose; 1447 } 1448 } else 1449 #endif 1450 1451 #ifndef NO_PACK_SUPPORT 1452 if (method == FT_PACK) { 1453 if (lflag) { 1454 maybe_warnx("no -l with packed files"); 1455 goto lose; 1456 } 1457 1458 size = unpack(fd, zfd, NULL, 0, NULL); 1459 } else 1460 #endif 1461 1462 #ifndef SMALL 1463 if (method == FT_UNKNOWN) { 1464 if (lflag) { 1465 maybe_warnx("no -l for unknown filetypes"); 1466 goto lose; 1467 } 1468 size = cat_fd(NULL, 0, NULL, fd); 1469 } else 1470 #endif 1471 { 1472 if (lflag) { 1473 print_list(fd, isb.st_size, outfile, isb.st_mtime); 1474 close(fd); 1475 return -1; /* XXX */ 1476 } 1477 1478 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1479 } 1480 1481 if (close(fd) != 0) 1482 maybe_warn("couldn't close input"); 1483 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1484 maybe_warn("couldn't close output"); 1485 1486 if (size == -1) { 1487 if (cflag == 0) 1488 unlink(outfile); 1489 maybe_warnx("%s: uncompress failed", file); 1490 return -1; 1491 } 1492 1493 /* if testing, or we uncompressed to stdout, this is all we need */ 1494 #ifndef SMALL 1495 if (tflag) 1496 return size; 1497 #endif 1498 /* if we are uncompressing to stdin, don't remove the file. */ 1499 if (cflag) 1500 return size; 1501 1502 /* 1503 * if we create a file... 1504 */ 1505 /* 1506 * if we can't stat the file don't remove the file. 1507 */ 1508 1509 ofd = open(outfile, O_RDWR, 0); 1510 if (ofd == -1) { 1511 maybe_warn("couldn't open (leaving original): %s", 1512 outfile); 1513 return -1; 1514 } 1515 if (fstat(ofd, &osb) != 0) { 1516 maybe_warn("couldn't stat (leaving original): %s", 1517 outfile); 1518 close(ofd); 1519 return -1; 1520 } 1521 if (osb.st_size != size) { 1522 maybe_warnx("stat gave different size: %" PRIdOFF 1523 " != %" PRIdOFF " (leaving original)", 1524 size, osb.st_size); 1525 close(ofd); 1526 unlink(outfile); 1527 return -1; 1528 } 1529 unlink_input(file, &isb); 1530 #ifndef SMALL 1531 copymodes(ofd, &isb, outfile); 1532 #endif 1533 close(ofd); 1534 return size; 1535 1536 unexpected_EOF: 1537 maybe_warnx("%s: unexpected end of file", file); 1538 lose: 1539 if (fd != -1) 1540 close(fd); 1541 if (zfd != -1 && zfd != STDOUT_FILENO) 1542 close(fd); 1543 return -1; 1544 } 1545 1546 #ifndef SMALL 1547 static off_t 1548 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd) 1549 { 1550 char buf[BUFLEN]; 1551 off_t in_tot; 1552 ssize_t w; 1553 1554 in_tot = count; 1555 w = write(STDOUT_FILENO, prepend, count); 1556 if (w == -1 || (size_t)w != count) { 1557 maybe_warn("write to stdout"); 1558 return -1; 1559 } 1560 for (;;) { 1561 ssize_t rv; 1562 1563 rv = read(fd, buf, sizeof buf); 1564 if (rv == 0) 1565 break; 1566 if (rv < 0) { 1567 maybe_warn("read from fd %d", fd); 1568 break; 1569 } 1570 1571 if (write(STDOUT_FILENO, buf, rv) != rv) { 1572 maybe_warn("write to stdout"); 1573 break; 1574 } 1575 in_tot += rv; 1576 } 1577 1578 if (gsizep) 1579 *gsizep = in_tot; 1580 return (in_tot); 1581 } 1582 #endif 1583 1584 static void 1585 handle_stdin(void) 1586 { 1587 unsigned char header1[4]; 1588 off_t usize, gsize; 1589 enum filetype method; 1590 ssize_t bytes_read; 1591 #ifndef NO_COMPRESS_SUPPORT 1592 FILE *in; 1593 #endif 1594 1595 #ifndef SMALL 1596 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1597 maybe_warnx("standard input is a terminal -- ignoring"); 1598 return; 1599 } 1600 #endif 1601 1602 if (lflag) { 1603 struct stat isb; 1604 1605 /* XXX could read the whole file, etc. */ 1606 if (fstat(STDIN_FILENO, &isb) < 0) { 1607 maybe_warn("fstat"); 1608 return; 1609 } 1610 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime); 1611 return; 1612 } 1613 1614 bytes_read = read_retry(STDIN_FILENO, header1, sizeof header1); 1615 if (bytes_read == -1) { 1616 maybe_warn("can't read stdin"); 1617 return; 1618 } else if (bytes_read != sizeof(header1)) { 1619 maybe_warnx("(stdin): unexpected end of file"); 1620 return; 1621 } 1622 1623 method = file_gettype(header1); 1624 switch (method) { 1625 default: 1626 #ifndef SMALL 1627 if (fflag == 0) { 1628 maybe_warnx("unknown compression format"); 1629 return; 1630 } 1631 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO); 1632 break; 1633 #endif 1634 case FT_GZIP: 1635 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1636 header1, sizeof header1, &gsize, "(stdin)"); 1637 break; 1638 #ifndef NO_BZIP2_SUPPORT 1639 case FT_BZIP2: 1640 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1641 header1, sizeof header1, &gsize); 1642 break; 1643 #endif 1644 #ifndef NO_COMPRESS_SUPPORT 1645 case FT_Z: 1646 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1647 maybe_warnx("zopen of stdin"); 1648 return; 1649 } 1650 1651 usize = zuncompress(in, stdout, header1, sizeof header1, &gsize); 1652 fclose(in); 1653 break; 1654 #endif 1655 #ifndef NO_PACK_SUPPORT 1656 case FT_PACK: 1657 usize = unpack(STDIN_FILENO, STDOUT_FILENO, 1658 (char *)header1, sizeof header1, &gsize); 1659 break; 1660 #endif 1661 } 1662 1663 #ifndef SMALL 1664 if (vflag && !tflag && usize != -1 && gsize != -1) 1665 print_verbage(NULL, NULL, usize, gsize); 1666 if (vflag && tflag) 1667 print_test("(stdin)", usize != -1); 1668 #endif 1669 1670 } 1671 1672 static void 1673 handle_stdout(void) 1674 { 1675 off_t gsize, usize; 1676 struct stat sb; 1677 time_t systime; 1678 uint32_t mtime; 1679 int ret; 1680 1681 #ifndef SMALL 1682 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1683 maybe_warnx("standard output is a terminal -- ignoring"); 1684 return; 1685 } 1686 #endif 1687 /* If stdin is a file use it's mtime, otherwise use current time */ 1688 ret = fstat(STDIN_FILENO, &sb); 1689 1690 #ifndef SMALL 1691 if (ret < 0) { 1692 maybe_warn("Can't stat stdin"); 1693 return; 1694 } 1695 #endif 1696 1697 if (S_ISREG(sb.st_mode)) 1698 mtime = (uint32_t)sb.st_mtime; 1699 else { 1700 systime = time(NULL); 1701 #ifndef SMALL 1702 if (systime == -1) { 1703 maybe_warn("time"); 1704 return; 1705 } 1706 #endif 1707 mtime = (uint32_t)systime; 1708 } 1709 1710 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime); 1711 #ifndef SMALL 1712 if (vflag && !tflag && usize != -1 && gsize != -1) 1713 print_verbage(NULL, NULL, usize, gsize); 1714 #endif 1715 } 1716 1717 /* do what is asked for, for the path name */ 1718 static void 1719 handle_pathname(char *path) 1720 { 1721 char *opath = path, *s = NULL; 1722 ssize_t len; 1723 int slen; 1724 struct stat sb; 1725 1726 /* check for stdout/stdin */ 1727 if (path[0] == '-' && path[1] == '\0') { 1728 if (dflag) 1729 handle_stdin(); 1730 else 1731 handle_stdout(); 1732 return; 1733 } 1734 1735 retry: 1736 if (stat(path, &sb) != 0) { 1737 /* lets try <path>.gz if we're decompressing */ 1738 if (dflag && s == NULL && errno == ENOENT) { 1739 len = strlen(path); 1740 slen = suffixes[0].ziplen; 1741 s = malloc(len + slen + 1); 1742 if (s == NULL) 1743 maybe_err("malloc"); 1744 memcpy(s, path, len); 1745 memcpy(s + len, suffixes[0].zipped, slen + 1); 1746 path = s; 1747 goto retry; 1748 } 1749 maybe_warn("can't stat: %s", opath); 1750 goto out; 1751 } 1752 1753 if (S_ISDIR(sb.st_mode)) { 1754 #ifndef SMALL 1755 if (rflag) 1756 handle_dir(path); 1757 else 1758 #endif 1759 maybe_warnx("%s is a directory", path); 1760 goto out; 1761 } 1762 1763 if (S_ISREG(sb.st_mode)) 1764 handle_file(path, &sb); 1765 else 1766 maybe_warnx("%s is not a regular file", path); 1767 1768 out: 1769 if (s) 1770 free(s); 1771 } 1772 1773 /* compress/decompress a file */ 1774 static void 1775 handle_file(char *file, struct stat *sbp) 1776 { 1777 off_t usize, gsize; 1778 char outfile[PATH_MAX]; 1779 1780 infile = file; 1781 if (dflag) { 1782 usize = file_uncompress(file, outfile, sizeof(outfile)); 1783 #ifndef SMALL 1784 if (vflag && tflag) 1785 print_test(file, usize != -1); 1786 #endif 1787 if (usize == -1) 1788 return; 1789 gsize = sbp->st_size; 1790 } else { 1791 gsize = file_compress(file, outfile, sizeof(outfile)); 1792 if (gsize == -1) 1793 return; 1794 usize = sbp->st_size; 1795 } 1796 1797 1798 #ifndef SMALL 1799 if (vflag && !tflag) 1800 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 1801 #endif 1802 } 1803 1804 #ifndef SMALL 1805 /* this is used with -r to recursively descend directories */ 1806 static void 1807 handle_dir(char *dir) 1808 { 1809 char *path_argv[2]; 1810 FTS *fts; 1811 FTSENT *entry; 1812 1813 path_argv[0] = dir; 1814 path_argv[1] = NULL; 1815 fts = fts_open(path_argv, FTS_PHYSICAL | FTS_NOCHDIR, NULL); 1816 if (fts == NULL) { 1817 warn("couldn't fts_open %s", dir); 1818 return; 1819 } 1820 1821 while ((entry = fts_read(fts))) { 1822 switch(entry->fts_info) { 1823 case FTS_D: 1824 case FTS_DP: 1825 continue; 1826 1827 case FTS_DNR: 1828 case FTS_ERR: 1829 case FTS_NS: 1830 maybe_warn("%s", entry->fts_path); 1831 continue; 1832 case FTS_F: 1833 handle_file(entry->fts_path, entry->fts_statp); 1834 } 1835 } 1836 (void)fts_close(fts); 1837 } 1838 #endif 1839 1840 /* print a ratio - size reduction as a fraction of uncompressed size */ 1841 static void 1842 print_ratio(off_t in, off_t out, FILE *where) 1843 { 1844 int percent10; /* 10 * percent */ 1845 off_t diff; 1846 char buff[8]; 1847 int len; 1848 1849 diff = in - out/2; 1850 if (diff <= 0) 1851 /* 1852 * Output is more than double size of input! print -99.9% 1853 * Quite possibly we've failed to get the original size. 1854 */ 1855 percent10 = -999; 1856 else { 1857 /* 1858 * We only need 12 bits of result from the final division, 1859 * so reduce the values until a 32bit division will suffice. 1860 */ 1861 while (in > 0x100000) { 1862 diff >>= 1; 1863 in >>= 1; 1864 } 1865 if (in != 0) 1866 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 1867 else 1868 percent10 = 0; 1869 } 1870 1871 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 1872 /* Move the '.' to before the last digit */ 1873 buff[len - 1] = buff[len - 2]; 1874 buff[len - 2] = '.'; 1875 fprintf(where, "%5s%%", buff); 1876 } 1877 1878 #ifndef SMALL 1879 /* print compression statistics, and the new name (if there is one!) */ 1880 static void 1881 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 1882 { 1883 if (file) 1884 fprintf(stderr, "%s:%s ", file, 1885 strlen(file) < 7 ? "\t\t" : "\t"); 1886 print_ratio(usize, gsize, stderr); 1887 if (nfile) 1888 fprintf(stderr, " -- replaced with %s", nfile); 1889 fprintf(stderr, "\n"); 1890 fflush(stderr); 1891 } 1892 1893 /* print test results */ 1894 static void 1895 print_test(const char *file, int ok) 1896 { 1897 1898 if (exit_value == 0 && ok == 0) 1899 exit_value = 1; 1900 fprintf(stderr, "%s:%s %s\n", file, 1901 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 1902 fflush(stderr); 1903 } 1904 #endif 1905 1906 /* print a file's info ala --list */ 1907 /* eg: 1908 compressed uncompressed ratio uncompressed_name 1909 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 1910 */ 1911 static void 1912 print_list(int fd, off_t out, const char *outfile, time_t ts) 1913 { 1914 static int first = 1; 1915 #ifndef SMALL 1916 static off_t in_tot, out_tot; 1917 uint32_t crc = 0; 1918 #endif 1919 off_t in = 0, rv; 1920 1921 if (first) { 1922 #ifndef SMALL 1923 if (vflag) 1924 printf("method crc date time "); 1925 #endif 1926 if (qflag == 0) 1927 printf(" compressed uncompressed " 1928 "ratio uncompressed_name\n"); 1929 } 1930 first = 0; 1931 1932 /* print totals? */ 1933 #ifndef SMALL 1934 if (fd == -1) { 1935 in = in_tot; 1936 out = out_tot; 1937 } else 1938 #endif 1939 { 1940 /* read the last 4 bytes - this is the uncompressed size */ 1941 rv = lseek(fd, (off_t)(-8), SEEK_END); 1942 if (rv != -1) { 1943 unsigned char buf[8]; 1944 uint32_t usize; 1945 1946 rv = read(fd, (char *)buf, sizeof(buf)); 1947 if (rv == -1) 1948 maybe_warn("read of uncompressed size"); 1949 else if (rv != sizeof(buf)) 1950 maybe_warnx("read of uncompressed size"); 1951 1952 else { 1953 usize = buf[4] | buf[5] << 8 | 1954 buf[6] << 16 | buf[7] << 24; 1955 in = (off_t)usize; 1956 #ifndef SMALL 1957 crc = buf[0] | buf[1] << 8 | 1958 buf[2] << 16 | buf[3] << 24; 1959 #endif 1960 } 1961 } 1962 } 1963 1964 #ifndef SMALL 1965 if (vflag && fd == -1) 1966 printf(" "); 1967 else if (vflag) { 1968 char *date = ctime(&ts); 1969 1970 /* skip the day, 1/100th second, and year */ 1971 date += 4; 1972 date[12] = 0; 1973 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 1974 } 1975 in_tot += in; 1976 out_tot += out; 1977 #endif 1978 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 1979 print_ratio(in, out, stdout); 1980 printf(" %s\n", outfile); 1981 } 1982 1983 /* display the usage of NetBSD gzip */ 1984 static void 1985 usage(void) 1986 { 1987 1988 fprintf(stderr, "%s\n", gzip_version); 1989 fprintf(stderr, 1990 #ifdef SMALL 1991 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n", 1992 #else 1993 "usage: %s [-123456789acdfhklLNnqrtVv] [-S .suffix] [<file> [<file> ...]]\n" 1994 " -1 --fast fastest (worst) compression\n" 1995 " -2 .. -8 set compression level\n" 1996 " -9 --best best (slowest) compression\n" 1997 " -c --stdout write to stdout, keep original files\n" 1998 " --to-stdout\n" 1999 " -d --decompress uncompress files\n" 2000 " --uncompress\n" 2001 " -f --force force overwriting & compress links\n" 2002 " -h --help display this help\n" 2003 " -k --keep don't delete input files during operation\n" 2004 " -l --list list compressed file contents\n" 2005 " -N --name save or restore original file name and time stamp\n" 2006 " -n --no-name don't save original file name or time stamp\n" 2007 " -q --quiet output no warnings\n" 2008 " -r --recursive recursively compress files in directories\n" 2009 " -S .suf use suffix .suf instead of .gz\n" 2010 " --suffix .suf\n" 2011 " -t --test test compressed file\n" 2012 " -V --version display program version\n" 2013 " -v --verbose print extra statistics\n", 2014 #endif 2015 getprogname()); 2016 exit(0); 2017 } 2018 2019 /* display the version of NetBSD gzip */ 2020 static void 2021 display_version(void) 2022 { 2023 2024 fprintf(stderr, "%s\n", gzip_version); 2025 exit(0); 2026 } 2027 2028 #ifndef NO_BZIP2_SUPPORT 2029 #include "unbzip2.c" 2030 #endif 2031 #ifndef NO_COMPRESS_SUPPORT 2032 #include "zuncompress.c" 2033 #endif 2034 #ifndef NO_PACK_SUPPORT 2035 #include "unpack.c" 2036 #endif 2037 2038 static ssize_t 2039 read_retry(int fd, void *buf, size_t sz) 2040 { 2041 char *cp = buf; 2042 size_t left = MIN(sz, (size_t) SSIZE_MAX); 2043 2044 while (left > 0) { 2045 ssize_t ret; 2046 2047 ret = read(fd, cp, left); 2048 if (ret == -1) { 2049 return ret; 2050 } else if (ret == 0) { 2051 break; /* EOF */ 2052 } 2053 cp += ret; 2054 left -= ret; 2055 } 2056 2057 return sz - left; 2058 } 2059