1 /* $NetBSD: gzip.c,v 1.70 2005/01/31 09:11:49 enami Exp $ */ 2 3 /* 4 * Copyright (c) 1997, 1998, 2003, 2004 Matthew R. Green 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 #ifndef lint 33 __COPYRIGHT("@(#) Copyright (c) 1997, 1998, 2003, 2004 Matthew R. Green\n\ 34 All rights reserved.\n"); 35 __RCSID("$NetBSD: gzip.c,v 1.70 2005/01/31 09:11:49 enami Exp $"); 36 #endif /* not lint */ 37 38 /* 39 * gzip.c -- GPL free gzip using zlib. 40 * 41 * RFC 1950 covers the zlib format 42 * RFC 1951 covers the deflate format 43 * RFC 1952 covers the gzip format 44 * 45 * TODO: 46 * - use mmap where possible 47 * - handle some signals better (remove outfile?) 48 * - make bzip2/compress -v/-t/-l support work as well as possible 49 */ 50 51 #include <sys/param.h> 52 #include <sys/stat.h> 53 #include <sys/time.h> 54 55 #include <inttypes.h> 56 #include <unistd.h> 57 #include <stdio.h> 58 #include <string.h> 59 #include <stdlib.h> 60 #include <err.h> 61 #include <errno.h> 62 #include <fcntl.h> 63 #include <zlib.h> 64 #include <fts.h> 65 #include <libgen.h> 66 #include <stdarg.h> 67 #include <getopt.h> 68 #include <time.h> 69 70 #ifndef PRIdOFF 71 #define PRIdOFF PRId64 72 #endif 73 74 /* what type of file are we dealing with */ 75 enum filetype { 76 FT_GZIP, 77 #ifndef NO_BZIP2_SUPPORT 78 FT_BZIP2, 79 #endif 80 #ifndef NO_COMPRESS_SUPPORT 81 FT_Z, 82 #endif 83 FT_LAST, 84 FT_UNKNOWN 85 }; 86 87 #ifndef NO_BZIP2_SUPPORT 88 #include <bzlib.h> 89 90 #define BZ2_SUFFIX ".bz2" 91 #define BZIP2_MAGIC "\102\132\150" 92 #endif 93 94 #ifndef NO_COMPRESS_SUPPORT 95 #define Z_SUFFIX ".Z" 96 #define Z_MAGIC "\037\235" 97 #endif 98 99 #define GZ_SUFFIX ".gz" 100 101 #define BUFLEN (64 * 1024) 102 103 #define GZIP_MAGIC0 0x1F 104 #define GZIP_MAGIC1 0x8B 105 #define GZIP_OMAGIC1 0x9E 106 107 #define GZIP_TIMESTAMP (off_t)4 108 #define GZIP_ORIGNAME (off_t)10 109 110 #define HEAD_CRC 0x02 111 #define EXTRA_FIELD 0x04 112 #define ORIG_NAME 0x08 113 #define COMMENT 0x10 114 115 #define OS_CODE 3 /* Unix */ 116 117 typedef struct { 118 const char *zipped; 119 int ziplen; 120 const char *normal; /* for unzip - must not be longer than zipped */ 121 } suffixes_t; 122 static suffixes_t suffixes[] = { 123 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N} 124 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */ 125 #ifndef SMALL 126 SUFFIX(GZ_SUFFIX, ""), 127 SUFFIX(".z", ""), 128 SUFFIX("-gz", ""), 129 SUFFIX("-z", ""), 130 SUFFIX("_z", ""), 131 SUFFIX(".taz", ".tar"), 132 SUFFIX(".tgz", ".tar"), 133 #ifndef NO_BZIP2_SUPPORT 134 SUFFIX(BZ2_SUFFIX, ""), 135 #endif 136 #ifndef NO_COMPRESS_SUPPORT 137 SUFFIX(Z_SUFFIX, ""), 138 #endif 139 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */ 140 #endif /* SMALL */ 141 #undef SUFFIX 142 }; 143 #define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0]) 144 145 static const char gzip_version[] = "NetBSD gzip 20040830"; 146 147 static int cflag; /* stdout mode */ 148 static int dflag; /* decompress mode */ 149 static int lflag; /* list mode */ 150 static int numflag = 6; /* gzip -1..-9 value */ 151 152 #ifndef SMALL 153 static int fflag; /* force mode */ 154 static int nflag; /* don't save name/timestamp */ 155 static int Nflag; /* don't restore name/timestamp */ 156 static int qflag; /* quiet mode */ 157 static int rflag; /* recursive mode */ 158 static int tflag; /* test */ 159 static int vflag; /* verbose mode */ 160 #else 161 #define qflag 0 162 #define tflag 0 163 #endif 164 165 static int exit_value = 0; /* exit value */ 166 167 static char *infile; /* name of file coming in */ 168 169 static void maybe_err(const char *fmt, ...) 170 __attribute__((__format__(__printf__, 1, 2))); 171 #ifndef NO_BZIP2_SUPPORT 172 static void maybe_errx(const char *fmt, ...) 173 __attribute__((__format__(__printf__, 1, 2))); 174 #endif 175 static void maybe_warn(const char *fmt, ...) 176 __attribute__((__format__(__printf__, 1, 2))); 177 static void maybe_warnx(const char *fmt, ...) 178 __attribute__((__format__(__printf__, 1, 2))); 179 static enum filetype file_gettype(u_char *); 180 #ifdef SMALL 181 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz) 182 #endif 183 static off_t gz_compress(int, int, off_t *, const char *, uint32_t); 184 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *); 185 static off_t file_compress(char *, char *, size_t); 186 static off_t file_uncompress(char *, char *, size_t); 187 static void handle_pathname(char *); 188 static void handle_file(char *, struct stat *); 189 static void handle_stdin(void); 190 static void handle_stdout(void); 191 static void print_ratio(off_t, off_t, FILE *); 192 static void print_list(int fd, off_t, const char *, time_t); 193 static void usage(void); 194 static void display_version(void); 195 static const suffixes_t *check_suffix(char *, int); 196 197 #ifdef SMALL 198 #define unlink_input(f, sb) unlink(f) 199 #else 200 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd); 201 static void prepend_gzip(char *, int *, char ***); 202 static void handle_dir(char *, struct stat *); 203 static void print_verbage(const char *, const char *, off_t, off_t); 204 static void print_test(const char *, int); 205 static void copymodes(const char *, struct stat *); 206 static int check_outfile(const char *outfile, struct stat *sb); 207 #endif 208 209 #ifndef NO_BZIP2_SUPPORT 210 static off_t unbzip2(int, int, char *, size_t, off_t *); 211 #endif 212 213 #ifndef NO_COMPRESS_SUPPORT 214 static FILE *zdopen(int); 215 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *); 216 #endif 217 218 int main(int, char *p[]); 219 220 #ifdef SMALL 221 #define getopt_long(a,b,c,d,e) getopt(a,b,c) 222 #else 223 static const struct option longopts[] = { 224 { "stdout", no_argument, 0, 'c' }, 225 { "to-stdout", no_argument, 0, 'c' }, 226 { "decompress", no_argument, 0, 'd' }, 227 { "uncompress", no_argument, 0, 'd' }, 228 { "force", no_argument, 0, 'f' }, 229 { "help", no_argument, 0, 'h' }, 230 { "list", no_argument, 0, 'l' }, 231 { "no-name", no_argument, 0, 'n' }, 232 { "name", no_argument, 0, 'N' }, 233 { "quiet", no_argument, 0, 'q' }, 234 { "recursive", no_argument, 0, 'r' }, 235 { "suffix", required_argument, 0, 'S' }, 236 { "test", no_argument, 0, 't' }, 237 { "verbose", no_argument, 0, 'v' }, 238 { "version", no_argument, 0, 'V' }, 239 { "fast", no_argument, 0, '1' }, 240 { "best", no_argument, 0, '9' }, 241 #if 0 242 /* 243 * This is what else GNU gzip implements. --ascii isn't useful 244 * on NetBSD, and I don't care to have a --license. 245 */ 246 { "ascii", no_argument, 0, 'a' }, 247 { "license", no_argument, 0, 'L' }, 248 #endif 249 { NULL, no_argument, 0, 0 }, 250 }; 251 #endif 252 253 int 254 main(int argc, char **argv) 255 { 256 const char *progname = getprogname(); 257 #ifndef SMALL 258 char *gzip; 259 int len; 260 #endif 261 int ch; 262 263 /* XXX set up signals */ 264 265 #ifndef SMALL 266 if ((gzip = getenv("GZIP")) != NULL) 267 prepend_gzip(gzip, &argc, &argv); 268 #endif 269 270 /* 271 * XXX 272 * handle being called `gunzip', `zcat' and `gzcat' 273 */ 274 if (strcmp(progname, "gunzip") == 0) 275 dflag = 1; 276 else if (strcmp(progname, "zcat") == 0 || 277 strcmp(progname, "gzcat") == 0) 278 dflag = cflag = 1; 279 280 #ifdef SMALL 281 #define OPT_LIST "cdhHltV123456789" 282 #else 283 #define OPT_LIST "cdfhHlnNqrS:tvV123456789" 284 #endif 285 286 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) { 287 switch (ch) { 288 case 'c': 289 cflag = 1; 290 break; 291 case 'd': 292 dflag = 1; 293 break; 294 case 'l': 295 lflag = 1; 296 dflag = 1; 297 break; 298 case 'V': 299 display_version(); 300 /* NOTREACHED */ 301 case '1': case '2': case '3': 302 case '4': case '5': case '6': 303 case '7': case '8': case '9': 304 numflag = ch - '0'; 305 break; 306 #ifndef SMALL 307 case 'f': 308 fflag = 1; 309 break; 310 case 'n': 311 nflag = 1; 312 Nflag = 0; 313 break; 314 case 'N': 315 nflag = 0; 316 Nflag = 1; 317 break; 318 case 'q': 319 qflag = 1; 320 break; 321 case 'r': 322 rflag = 1; 323 break; 324 case 'S': 325 len = strlen(optarg); 326 if (len != 0) { 327 suffixes[0].zipped = optarg; 328 suffixes[0].ziplen = len; 329 } else { 330 suffixes[NUM_SUFFIXES - 1].zipped = ""; 331 suffixes[NUM_SUFFIXES - 1].ziplen = 0; 332 } 333 break; 334 case 't': 335 cflag = 1; 336 tflag = 1; 337 dflag = 1; 338 break; 339 case 'v': 340 vflag = 1; 341 break; 342 #endif 343 default: 344 usage(); 345 /* NOTREACHED */ 346 } 347 } 348 argv += optind; 349 argc -= optind; 350 351 if (argc == 0) { 352 if (dflag) /* stdin mode */ 353 handle_stdin(); 354 else /* stdout mode */ 355 handle_stdout(); 356 } else { 357 do { 358 handle_pathname(argv[0]); 359 } while (*++argv); 360 } 361 #ifndef SMALL 362 if (qflag == 0 && lflag && argc > 1) 363 print_list(-1, 0, "(totals)", 0); 364 #endif 365 exit(exit_value); 366 } 367 368 /* maybe print a warning */ 369 void 370 maybe_warn(const char *fmt, ...) 371 { 372 va_list ap; 373 374 if (qflag == 0) { 375 va_start(ap, fmt); 376 vwarn(fmt, ap); 377 va_end(ap); 378 } 379 if (exit_value == 0) 380 exit_value = 1; 381 } 382 383 /* ... without an errno. */ 384 void 385 maybe_warnx(const char *fmt, ...) 386 { 387 va_list ap; 388 389 if (qflag == 0) { 390 va_start(ap, fmt); 391 vwarnx(fmt, ap); 392 va_end(ap); 393 } 394 if (exit_value == 0) 395 exit_value = 1; 396 } 397 398 /* maybe print an error */ 399 void 400 maybe_err(const char *fmt, ...) 401 { 402 va_list ap; 403 404 if (qflag == 0) { 405 va_start(ap, fmt); 406 vwarn(fmt, ap); 407 va_end(ap); 408 } 409 exit(2); 410 } 411 412 #ifndef NO_BZIP2_SUPPORT 413 /* ... without an errno. */ 414 void 415 maybe_errx(const char *fmt, ...) 416 { 417 va_list ap; 418 419 if (qflag == 0) { 420 va_start(ap, fmt); 421 vwarnx(fmt, ap); 422 va_end(ap); 423 } 424 exit(2); 425 } 426 #endif 427 428 #ifndef SMALL 429 /* split up $GZIP and prepend it to the argument list */ 430 static void 431 prepend_gzip(char *gzip, int *argc, char ***argv) 432 { 433 char *s, **nargv, **ac; 434 int nenvarg = 0, i; 435 436 /* scan how many arguments there are */ 437 for (s = gzip;;) { 438 while (*s == ' ' || *s == '\t') 439 s++; 440 if (*s == 0) 441 goto count_done; 442 nenvarg++; 443 while (*s != ' ' && *s != '\t') 444 if (*s++ == 0) 445 goto count_done; 446 } 447 count_done: 448 /* punt early */ 449 if (nenvarg == 0) 450 return; 451 452 *argc += nenvarg; 453 ac = *argv; 454 455 nargv = (char **)malloc((*argc + 1) * sizeof(char *)); 456 if (nargv == NULL) 457 maybe_err("malloc"); 458 459 /* stash this away */ 460 *argv = nargv; 461 462 /* copy the program name first */ 463 i = 0; 464 nargv[i++] = *(ac++); 465 466 /* take a copy of $GZIP and add it to the array */ 467 s = strdup(gzip); 468 if (s == NULL) 469 maybe_err("strdup"); 470 for (;;) { 471 /* Skip whitespaces. */ 472 while (*s == ' ' || *s == '\t') 473 s++; 474 if (*s == 0) 475 goto copy_done; 476 nargv[i++] = s; 477 /* Find the end of this argument. */ 478 while (*s != ' ' && *s != '\t') 479 if (*s++ == 0) 480 /* Argument followed by NUL. */ 481 goto copy_done; 482 /* Terminate by overwriting ' ' or '\t' with NUL. */ 483 *s++ = 0; 484 } 485 copy_done: 486 487 /* copy the original arguments and a NULL */ 488 while (*ac) 489 nargv[i++] = *(ac++); 490 nargv[i] = NULL; 491 } 492 #endif 493 494 /* compress input to output. Return bytes read, -1 on error */ 495 static off_t 496 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime) 497 { 498 z_stream z; 499 char *outbufp, *inbufp; 500 off_t in_tot = 0, out_tot = 0; 501 ssize_t in_size; 502 int i, error; 503 uLong crc; 504 #ifdef SMALL 505 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0, 506 0, 0, 0, 0, 507 0, OS_CODE }; 508 #endif 509 510 outbufp = malloc(BUFLEN); 511 inbufp = malloc(BUFLEN); 512 if (outbufp == NULL || inbufp == NULL) { 513 maybe_err("malloc failed"); 514 goto out; 515 } 516 517 memset(&z, 0, sizeof z); 518 z.zalloc = Z_NULL; 519 z.zfree = Z_NULL; 520 z.opaque = 0; 521 522 #ifdef SMALL 523 memcpy(outbufp, header, sizeof header); 524 i = sizeof header; 525 #else 526 if (nflag != 0) { 527 mtime = 0; 528 origname = ""; 529 } 530 531 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s", 532 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 533 *origname ? ORIG_NAME : 0, 534 mtime & 0xff, 535 (mtime >> 8) & 0xff, 536 (mtime >> 16) & 0xff, 537 (mtime >> 24) & 0xff, 538 numflag == 1 ? 4 : numflag == 9 ? 2 : 0, 539 OS_CODE, origname); 540 if (i >= BUFLEN) 541 /* this need PATH_MAX > BUFLEN ... */ 542 maybe_err("snprintf"); 543 if (*origname) 544 i++; 545 #endif 546 547 z.next_out = outbufp + i; 548 z.avail_out = BUFLEN - i; 549 550 error = deflateInit2(&z, numflag, Z_DEFLATED, 551 -MAX_WBITS, 8, Z_DEFAULT_STRATEGY); 552 if (error != Z_OK) { 553 maybe_warnx("deflateInit2 failed"); 554 in_tot = -1; 555 goto out; 556 } 557 558 crc = crc32(0L, Z_NULL, 0); 559 for (;;) { 560 if (z.avail_out == 0) { 561 if (write(out, outbufp, BUFLEN) != BUFLEN) { 562 maybe_warn("write"); 563 in_tot = -1; 564 goto out; 565 } 566 567 out_tot += BUFLEN; 568 z.next_out = outbufp; 569 z.avail_out = BUFLEN; 570 } 571 572 if (z.avail_in == 0) { 573 in_size = read(in, inbufp, BUFLEN); 574 if (in_size < 0) { 575 maybe_warn("read"); 576 in_tot = -1; 577 goto out; 578 } 579 if (in_size == 0) 580 break; 581 582 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size); 583 in_tot += in_size; 584 z.next_in = inbufp; 585 z.avail_in = in_size; 586 } 587 588 error = deflate(&z, Z_NO_FLUSH); 589 if (error != Z_OK && error != Z_STREAM_END) { 590 maybe_warnx("deflate failed"); 591 in_tot = -1; 592 goto out; 593 } 594 } 595 596 /* clean up */ 597 for (;;) { 598 size_t len; 599 600 error = deflate(&z, Z_FINISH); 601 if (error != Z_OK && error != Z_STREAM_END) { 602 maybe_warnx("deflate failed"); 603 in_tot = -1; 604 goto out; 605 } 606 607 len = (char *)z.next_out - outbufp; 608 609 if (write(out, outbufp, len) != len) { 610 maybe_warn("write"); 611 out_tot = -1; 612 goto out; 613 } 614 out_tot += len; 615 z.next_out = outbufp; 616 z.avail_out = BUFLEN; 617 618 if (error == Z_STREAM_END) 619 break; 620 } 621 622 if (deflateEnd(&z) != Z_OK) { 623 maybe_warnx("deflateEnd failed"); 624 in_tot = -1; 625 goto out; 626 } 627 628 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c", 629 (int)crc & 0xff, 630 (int)(crc >> 8) & 0xff, 631 (int)(crc >> 16) & 0xff, 632 (int)(crc >> 24) & 0xff, 633 (int)in_tot & 0xff, 634 (int)(in_tot >> 8) & 0xff, 635 (int)(in_tot >> 16) & 0xff, 636 (int)(in_tot >> 24) & 0xff); 637 if (i != 8) 638 maybe_err("snprintf"); 639 if (write(out, outbufp, i) != i) { 640 maybe_warn("write"); 641 in_tot = -1; 642 } else 643 out_tot += i; 644 645 out: 646 if (inbufp != NULL) 647 free(inbufp); 648 if (outbufp != NULL) 649 free(outbufp); 650 if (gsizep) 651 *gsizep = out_tot; 652 return in_tot; 653 } 654 655 /* 656 * uncompress input to output then close the input. return the 657 * uncompressed size written, and put the compressed sized read 658 * into `*gsizep'. 659 */ 660 static off_t 661 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep, 662 const char *filename) 663 { 664 z_stream z; 665 char *outbufp, *inbufp; 666 off_t out_tot, in_tot; 667 uint32_t out_sub_tot; 668 enum { 669 GZSTATE_MAGIC0, 670 GZSTATE_MAGIC1, 671 GZSTATE_METHOD, 672 GZSTATE_FLAGS, 673 GZSTATE_SKIPPING, 674 GZSTATE_EXTRA, 675 GZSTATE_EXTRA2, 676 GZSTATE_EXTRA3, 677 GZSTATE_ORIGNAME, 678 GZSTATE_COMMENT, 679 GZSTATE_HEAD_CRC1, 680 GZSTATE_HEAD_CRC2, 681 GZSTATE_INIT, 682 GZSTATE_READ, 683 GZSTATE_CRC, 684 GZSTATE_LEN, 685 } state = GZSTATE_MAGIC0; 686 int flags = 0, skip_count = 0; 687 int error, done_reading = 0; 688 uLong crc; 689 ssize_t wr; 690 691 #define ADVANCE() { z.next_in++; z.avail_in--; } 692 693 if ((outbufp = malloc(BUFLEN)) == NULL) { 694 maybe_err("malloc failed"); 695 goto out2; 696 } 697 if ((inbufp = malloc(BUFLEN)) == NULL) { 698 maybe_err("malloc failed"); 699 goto out1; 700 } 701 702 memset(&z, 0, sizeof z); 703 z.avail_in = prelen; 704 z.next_in = pre; 705 z.avail_out = BUFLEN; 706 z.next_out = outbufp; 707 z.zalloc = NULL; 708 z.zfree = NULL; 709 z.opaque = 0; 710 711 in_tot = prelen; 712 out_tot = 0; 713 714 for (;;) { 715 if (z.avail_in == 0 && done_reading == 0) { 716 size_t in_size = read(in, inbufp, BUFLEN); 717 718 if (in_size == -1) { 719 #ifndef SMALL 720 if (tflag && vflag) 721 print_test(filename, 0); 722 #endif 723 maybe_warn("failed to read stdin"); 724 out_tot = -1; 725 goto stop; 726 } else if (in_size == 0) 727 done_reading = 1; 728 729 z.avail_in = in_size; 730 z.next_in = inbufp; 731 732 in_tot += in_size; 733 } 734 if (z.avail_in == 0) { 735 if (done_reading && state != GZSTATE_MAGIC0) 736 maybe_warnx("%s: unexpected end of file", 737 filename); 738 goto stop; 739 } 740 switch (state) { 741 case GZSTATE_MAGIC0: 742 if (*z.next_in != GZIP_MAGIC0) { 743 maybe_warnx("input not gziped (MAGIC0)"); 744 out_tot = -1; 745 goto stop; 746 } 747 ADVANCE(); 748 state++; 749 out_sub_tot = 0; 750 crc = crc32(0L, Z_NULL, 0); 751 break; 752 753 case GZSTATE_MAGIC1: 754 if (*z.next_in != GZIP_MAGIC1 && 755 *z.next_in != GZIP_OMAGIC1) { 756 maybe_warnx("input not gziped (MAGIC1)"); 757 out_tot = -1; 758 goto stop; 759 } 760 ADVANCE(); 761 state++; 762 break; 763 764 case GZSTATE_METHOD: 765 if (*z.next_in != Z_DEFLATED) { 766 maybe_warnx("unknown compression method"); 767 out_tot = -1; 768 goto stop; 769 } 770 ADVANCE(); 771 state++; 772 break; 773 774 case GZSTATE_FLAGS: 775 flags = *z.next_in; 776 ADVANCE(); 777 skip_count = 6; 778 state++; 779 break; 780 781 case GZSTATE_SKIPPING: 782 if (skip_count > 0) { 783 skip_count--; 784 ADVANCE(); 785 } else 786 state++; 787 break; 788 789 case GZSTATE_EXTRA: 790 if ((flags & EXTRA_FIELD) == 0) { 791 state = GZSTATE_ORIGNAME; 792 break; 793 } 794 skip_count = *z.next_in; 795 ADVANCE(); 796 state++; 797 break; 798 799 case GZSTATE_EXTRA2: 800 skip_count |= ((*z.next_in) << 8); 801 ADVANCE(); 802 state++; 803 break; 804 805 case GZSTATE_EXTRA3: 806 if (skip_count > 0) { 807 skip_count--; 808 ADVANCE(); 809 } else 810 state++; 811 break; 812 813 case GZSTATE_ORIGNAME: 814 if ((flags & ORIG_NAME) == 0) { 815 state++; 816 break; 817 } 818 if (*z.next_in == 0) 819 state++; 820 ADVANCE(); 821 break; 822 823 case GZSTATE_COMMENT: 824 if ((flags & COMMENT) == 0) { 825 state++; 826 break; 827 } 828 if (*z.next_in == 0) 829 state++; 830 ADVANCE(); 831 break; 832 833 case GZSTATE_HEAD_CRC1: 834 if (flags & HEAD_CRC) 835 skip_count = 2; 836 else 837 skip_count = 0; 838 state++; 839 break; 840 841 case GZSTATE_HEAD_CRC2: 842 if (skip_count > 0) { 843 skip_count--; 844 ADVANCE(); 845 } else 846 state++; 847 break; 848 849 case GZSTATE_INIT: 850 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) { 851 maybe_warnx("failed to inflateInit"); 852 out_tot = -1; 853 goto stop; 854 } 855 state++; 856 break; 857 858 case GZSTATE_READ: 859 error = inflate(&z, Z_FINISH); 860 /* Z_BUF_ERROR goes with Z_FINISH... */ 861 if (error != Z_STREAM_END && error != Z_BUF_ERROR) 862 /* Just need more input */ 863 break; 864 wr = BUFLEN - z.avail_out; 865 866 if (wr != 0) { 867 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 868 if ( 869 #ifndef SMALL 870 /* don't write anything with -t */ 871 tflag == 0 && 872 #endif 873 write(out, outbufp, wr) != wr) { 874 maybe_warn("error writing to output"); 875 out_tot = -1; 876 goto stop; 877 } 878 879 out_tot += wr; 880 out_sub_tot += wr; 881 } 882 883 if (error == Z_STREAM_END) { 884 inflateEnd(&z); 885 state++; 886 } 887 888 z.next_out = outbufp; 889 z.avail_out = BUFLEN; 890 891 break; 892 case GZSTATE_CRC: 893 { 894 static int empty_buffer = 0; 895 uLong origcrc; 896 897 if (z.avail_in < 4) { 898 if (!done_reading && empty_buffer++ < 4) 899 continue; 900 maybe_warnx("truncated input"); 901 out_tot = -1; 902 goto stop; 903 } 904 empty_buffer = 0; 905 origcrc = ((unsigned)z.next_in[0] & 0xff) | 906 ((unsigned)z.next_in[1] & 0xff) << 8 | 907 ((unsigned)z.next_in[2] & 0xff) << 16 | 908 ((unsigned)z.next_in[3] & 0xff) << 24; 909 if (origcrc != crc) { 910 maybe_warnx("invalid compressed" 911 " data--crc error"); 912 out_tot = -1; 913 goto stop; 914 } 915 } 916 917 z.avail_in -= 4; 918 z.next_in += 4; 919 920 if (!z.avail_in) 921 goto stop; 922 state++; 923 break; 924 case GZSTATE_LEN: 925 { 926 static int empty_buffer = 0; 927 uLong origlen; 928 929 if (z.avail_in < 4) { 930 if (!done_reading && empty_buffer++ < 4) 931 continue; 932 maybe_warnx("truncated input"); 933 out_tot = -1; 934 goto stop; 935 } 936 empty_buffer = 0; 937 origlen = ((unsigned)z.next_in[0] & 0xff) | 938 ((unsigned)z.next_in[1] & 0xff) << 8 | 939 ((unsigned)z.next_in[2] & 0xff) << 16 | 940 ((unsigned)z.next_in[3] & 0xff) << 24; 941 942 if (origlen != out_sub_tot) { 943 maybe_warnx("invalid compressed" 944 " data--length error"); 945 out_tot = -1; 946 goto stop; 947 } 948 } 949 950 z.avail_in -= 4; 951 z.next_in += 4; 952 953 if (error < 0) { 954 maybe_warnx("decompression error"); 955 out_tot = -1; 956 goto stop; 957 } 958 state = GZSTATE_MAGIC0; 959 break; 960 } 961 continue; 962 stop: 963 break; 964 } 965 if (state > GZSTATE_INIT) 966 inflateEnd(&z); 967 968 #ifndef SMALL 969 if (tflag && vflag) 970 print_test(filename, out_tot != -1); 971 #endif 972 973 free(inbufp); 974 out1: 975 free(outbufp); 976 out2: 977 if (gsizep) 978 *gsizep = in_tot; 979 return (out_tot); 980 } 981 982 #ifndef SMALL 983 /* 984 * set the owner, mode, flags & utimes for a file 985 */ 986 static void 987 copymodes(const char *file, struct stat *sbp) 988 { 989 struct timeval times[2]; 990 991 /* 992 * If we have no info on the input, give this file some 993 * default values and return.. 994 */ 995 if (sbp == NULL) { 996 mode_t mask = umask(022); 997 998 (void)chmod(file, DEFFILEMODE & ~mask); 999 (void)umask(mask); 1000 return; 1001 } 1002 1003 /* if the chown fails, remove set-id bits as-per compress(1) */ 1004 if (chown(file, sbp->st_uid, sbp->st_gid) < 0) { 1005 if (errno != EPERM) 1006 maybe_warn("couldn't chown: %s", file); 1007 sbp->st_mode &= ~(S_ISUID|S_ISGID); 1008 } 1009 1010 /* we only allow set-id and the 9 normal permission bits */ 1011 sbp->st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1012 if (chmod(file, sbp->st_mode) < 0) 1013 maybe_warn("couldn't chmod: %s", file); 1014 1015 /* only try flags if they exist already */ 1016 if (sbp->st_flags != 0 && chflags(file, sbp->st_flags) < 0) 1017 maybe_warn("couldn't chflags: %s", file); 1018 1019 TIMESPEC_TO_TIMEVAL(×[0], &sbp->st_atimespec); 1020 TIMESPEC_TO_TIMEVAL(×[1], &sbp->st_mtimespec); 1021 if (utimes(file, times) < 0) 1022 maybe_warn("couldn't utimes: %s", file); 1023 } 1024 #endif 1025 1026 /* what sort of file is this? */ 1027 static enum filetype 1028 file_gettype(u_char *buf) 1029 { 1030 1031 if (buf[0] == GZIP_MAGIC0 && 1032 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1033 return FT_GZIP; 1034 else 1035 #ifndef NO_BZIP2_SUPPORT 1036 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1037 buf[3] >= '0' && buf[3] <= '9') 1038 return FT_BZIP2; 1039 else 1040 #endif 1041 #ifndef NO_COMPRESS_SUPPORT 1042 if (memcmp(buf, Z_MAGIC, 2) == 0) 1043 return FT_Z; 1044 else 1045 #endif 1046 return FT_UNKNOWN; 1047 } 1048 1049 #ifndef SMALL 1050 /* check the outfile is OK. */ 1051 static int 1052 check_outfile(const char *outfile, struct stat *sb) 1053 { 1054 int ok = 1; 1055 1056 if (lflag == 0 && stat(outfile, sb) == 0) { 1057 if (fflag) 1058 unlink(outfile); 1059 else if (isatty(STDIN_FILENO)) { 1060 char ans[10] = { 'n', '\0' }; /* default */ 1061 1062 fprintf(stderr, "%s already exists -- do you wish to " 1063 "overwrite (y or n)? " , outfile); 1064 (void)fgets(ans, sizeof(ans) - 1, stdin); 1065 if (ans[0] != 'y' && ans[0] != 'Y') { 1066 fprintf(stderr, "\tnot overwritting\n"); 1067 ok = 0; 1068 } else 1069 unlink(outfile); 1070 } else { 1071 maybe_warnx("%s already exists -- skipping", outfile); 1072 ok = 0; 1073 } 1074 } 1075 return ok; 1076 } 1077 1078 static void 1079 unlink_input(const char *file, struct stat *sb) 1080 { 1081 struct stat nsb; 1082 1083 if (stat(file, &nsb) != 0) 1084 /* Must be gone alrady */ 1085 return; 1086 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1087 /* Definitely a different file */ 1088 return; 1089 unlink(file); 1090 } 1091 #endif 1092 1093 static const suffixes_t * 1094 check_suffix(char *file, int xlate) 1095 { 1096 const suffixes_t *s; 1097 int len = strlen(file); 1098 char *sp; 1099 1100 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1101 /* if it doesn't fit in "a.suf", don't bother */ 1102 if (s->ziplen >= len) 1103 continue; 1104 sp = file + len - s->ziplen; 1105 if (strcmp(s->zipped, sp) != 0) 1106 continue; 1107 if (xlate) 1108 strcpy(sp, s->normal); 1109 return s; 1110 } 1111 return NULL; 1112 } 1113 1114 /* 1115 * compress the given file: create a corresponding .gz file and remove the 1116 * original. 1117 */ 1118 static off_t 1119 file_compress(char *file, char *outfile, size_t outsize) 1120 { 1121 int in; 1122 int out; 1123 off_t size, insize; 1124 #ifndef SMALL 1125 struct stat isb, osb; 1126 const suffixes_t *suff; 1127 #endif 1128 1129 in = open(file, O_RDONLY); 1130 if (in == -1) { 1131 maybe_warn("can't open %s", file); 1132 return -1; 1133 } 1134 1135 if (cflag == 0) { 1136 #ifndef SMALL 1137 if (stat(file, &isb) == 0) { 1138 if (isb.st_nlink > 1 && fflag == 0) { 1139 maybe_warnx("%s has %d other link%s -- " 1140 "skipping", file, isb.st_nlink - 1, 1141 isb.st_nlink == 1 ? "" : "s"); 1142 close(in); 1143 return -1; 1144 } 1145 } 1146 1147 if (fflag == 0 && (suff = check_suffix(file, 0)) 1148 && suff->zipped[0] != 0) { 1149 maybe_warnx("%s already has %s suffix -- unchanged", 1150 file, suff->zipped); 1151 close(in); 1152 return -1; 1153 } 1154 #endif 1155 1156 /* Add (usually) .gz to filename */ 1157 if (snprintf(outfile, outsize, "%s%s", 1158 file, suffixes[0].zipped) >= outsize) 1159 memcpy(outfile - suffixes[0].ziplen - 1, 1160 suffixes[0].zipped, suffixes[0].ziplen + 1); 1161 1162 #ifndef SMALL 1163 if (check_outfile(outfile, &osb) == 0) { 1164 close(in); 1165 return -1; 1166 } 1167 #endif 1168 } 1169 1170 if (cflag == 0) { 1171 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600); 1172 if (out == -1) { 1173 maybe_warn("could not create output: %s", outfile); 1174 fclose(stdin); 1175 return -1; 1176 } 1177 } else 1178 out = STDOUT_FILENO; 1179 1180 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1181 1182 (void)close(in); 1183 1184 /* 1185 * If there was an error, insize will be -1. 1186 * If we compressed to stdout, just return the size. 1187 * Otherwise stat the file and check it is the correct size. 1188 * We only blow away the file if we can stat the output and it 1189 * has the expected size. 1190 */ 1191 if (cflag != 0) 1192 return insize == -1 ? -1 : size; 1193 1194 if (close(out) == -1) 1195 maybe_warn("couldn't close ouput"); 1196 1197 #ifndef SMALL 1198 if (stat(outfile, &osb) < 0) { 1199 maybe_warn("couldn't stat: %s", outfile); 1200 goto bad_outfile; 1201 } 1202 1203 if (osb.st_size != size) { 1204 maybe_warnx("output file: %s wrong size (%" PRIdOFF 1205 " != %" PRIdOFF "), deleting", 1206 outfile, osb.st_size, size); 1207 goto bad_outfile; 1208 } 1209 1210 copymodes(outfile, &isb); 1211 #endif 1212 1213 /* output is good, ok to delete input */ 1214 unlink_input(file, &isb); 1215 return size; 1216 1217 #ifndef SMALL 1218 bad_outfile: 1219 maybe_warnx("leaving original %s", file); 1220 unlink(outfile); 1221 return size; 1222 #endif 1223 } 1224 1225 /* uncompress the given file and remove the original */ 1226 static off_t 1227 file_uncompress(char *file, char *outfile, size_t outsize) 1228 { 1229 struct stat isb, osb; 1230 off_t size; 1231 ssize_t rbytes; 1232 unsigned char header1[4]; 1233 enum filetype method; 1234 int fd, zfd = -1; 1235 #ifndef SMALL 1236 time_t timestamp = 0; 1237 unsigned char name[PATH_MAX + 1]; 1238 #endif 1239 1240 /* gather the old name info */ 1241 1242 fd = open(file, O_RDONLY); 1243 if (fd < 0) { 1244 maybe_warn("can't open %s", file); 1245 goto lose; 1246 } 1247 1248 strlcpy(outfile, file, outsize); 1249 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1250 maybe_warnx("%s: unknown suffix -- ignored", file); 1251 goto lose; 1252 } 1253 1254 rbytes = read(fd, header1, sizeof header1); 1255 if (rbytes != sizeof header1) { 1256 /* we don't want to fail here. */ 1257 #ifndef SMALL 1258 if (fflag) 1259 goto lose; 1260 #endif 1261 if (rbytes == -1) 1262 maybe_warn("can't read %s", file); 1263 else 1264 maybe_warnx("%s: unexpected end of file", file); 1265 goto lose; 1266 } 1267 1268 method = file_gettype(header1); 1269 1270 #ifndef SMALL 1271 if (fflag == 0 && method == FT_UNKNOWN) { 1272 maybe_warnx("%s: not in gzip format", file); 1273 goto lose; 1274 } 1275 1276 #endif 1277 1278 #ifndef SMALL 1279 if (method == FT_GZIP && Nflag) { 1280 unsigned char ts[4]; /* timestamp */ 1281 1282 if (pread(fd, ts, sizeof ts, GZIP_TIMESTAMP) != sizeof ts) { 1283 if (!fflag) 1284 maybe_warn("can't read %s", file); 1285 goto lose; 1286 } 1287 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0]; 1288 1289 if (header1[3] & ORIG_NAME) { 1290 rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME); 1291 if (rbytes < 0) { 1292 maybe_warn("can't read %s", file); 1293 goto lose; 1294 } 1295 if (name[0] != 0) { 1296 /* preserve original directory name */ 1297 char *dp = strrchr(file, '/'); 1298 if (dp == NULL) 1299 dp = file; 1300 else 1301 dp++; 1302 snprintf(outfile, outsize, "%.*s%.*s", 1303 (int) (dp - file), 1304 file, (int) rbytes, name); 1305 } 1306 } 1307 } 1308 #endif 1309 lseek(fd, 0, SEEK_SET); 1310 1311 if (cflag == 0 || lflag) { 1312 if (fstat(fd, &isb) != 0) 1313 goto lose; 1314 #ifndef SMALL 1315 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1316 maybe_warnx("%s has %d other links -- skipping", 1317 file, isb.st_nlink - 1); 1318 goto lose; 1319 } 1320 if (nflag == 0 && timestamp) 1321 isb.st_mtime = timestamp; 1322 if (check_outfile(outfile, &osb) == 0) 1323 goto lose; 1324 #endif 1325 } 1326 1327 if (cflag == 0 && lflag == 0) { 1328 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1329 if (zfd == STDOUT_FILENO) { 1330 /* We won't close STDOUT_FILENO later... */ 1331 zfd = dup(zfd); 1332 close(STDOUT_FILENO); 1333 } 1334 if (zfd == -1) { 1335 maybe_warn("can't open %s", outfile); 1336 goto lose; 1337 } 1338 } else 1339 zfd = STDOUT_FILENO; 1340 1341 #ifndef NO_BZIP2_SUPPORT 1342 if (method == FT_BZIP2) { 1343 1344 /* XXX */ 1345 if (lflag) { 1346 maybe_warnx("no -l with bzip2 files"); 1347 goto lose; 1348 } 1349 1350 size = unbzip2(fd, zfd, NULL, 0, NULL); 1351 } else 1352 #endif 1353 1354 #ifndef NO_COMPRESS_SUPPORT 1355 if (method == FT_Z) { 1356 FILE *in, *out; 1357 1358 /* XXX */ 1359 if (lflag) { 1360 maybe_warnx("no -l with Lempel-Ziv files"); 1361 goto lose; 1362 } 1363 1364 if ((in = zdopen(fd)) == NULL) { 1365 maybe_warn("zdopen for read: %s", file); 1366 goto lose; 1367 } 1368 1369 out = fdopen(dup(zfd), "w"); 1370 if (out == NULL) { 1371 maybe_warn("fdopen for write: %s", outfile); 1372 fclose(in); 1373 goto lose; 1374 } 1375 1376 size = zuncompress(in, out, NULL, 0, NULL); 1377 /* need to fclose() if ferror() is true... */ 1378 if (ferror(in) | fclose(in)) { 1379 maybe_warn("failed infile fclose"); 1380 unlink(outfile); 1381 (void)fclose(out); 1382 } 1383 if (fclose(out) != 0) { 1384 maybe_warn("failed outfile fclose"); 1385 unlink(outfile); 1386 goto lose; 1387 } 1388 } else 1389 #endif 1390 1391 #ifndef SMALL 1392 if (method == FT_UNKNOWN) { 1393 if (lflag) { 1394 maybe_warnx("no -l for unknown filetypes"); 1395 goto lose; 1396 } 1397 size = cat_fd(NULL, 0, NULL, fd); 1398 } else 1399 #endif 1400 { 1401 if (lflag) { 1402 print_list(fd, isb.st_size, outfile, isb.st_mtime); 1403 close(fd); 1404 return -1; /* XXX */ 1405 } 1406 1407 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1408 } 1409 1410 if (close(fd) != 0) 1411 maybe_warn("couldn't close input"); 1412 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1413 maybe_warn("couldn't close output"); 1414 1415 if (size == -1) { 1416 if (cflag == 0) 1417 unlink(outfile); 1418 maybe_warnx("%s: uncompress failed", file); 1419 return -1; 1420 } 1421 1422 /* if testing, or we uncompressed to stdout, this is all we need */ 1423 #ifndef SMALL 1424 if (tflag) 1425 return size; 1426 #endif 1427 /* if we are uncompressing to stdin, don't remove the file. */ 1428 if (cflag) 1429 return size; 1430 1431 /* 1432 * if we create a file... 1433 */ 1434 /* 1435 * if we can't stat the file don't remove the file. 1436 */ 1437 if (stat(outfile, &osb) < 0) { 1438 maybe_warn("couldn't stat (leaving original): %s", 1439 outfile); 1440 return -1; 1441 } 1442 if (osb.st_size != size) { 1443 maybe_warn("stat gave different size: %" PRIdOFF 1444 " != %" PRIdOFF " (leaving original)", 1445 size, osb.st_size); 1446 unlink(outfile); 1447 return -1; 1448 } 1449 unlink_input(file, &isb); 1450 #ifndef SMALL 1451 copymodes(outfile, &isb); 1452 #endif 1453 return size; 1454 1455 lose: 1456 if (fd != -1) 1457 close(fd); 1458 if (zfd != -1 && zfd != STDOUT_FILENO) 1459 close(fd); 1460 return -1; 1461 } 1462 1463 #ifndef SMALL 1464 static off_t 1465 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd) 1466 { 1467 char buf[BUFLEN]; 1468 size_t rv; 1469 off_t in_tot; 1470 1471 in_tot = count; 1472 if (write(STDOUT_FILENO, prepend, count) != count) { 1473 maybe_warn("write to stdout"); 1474 return -1; 1475 } 1476 for (;;) { 1477 rv = read(fd, buf, sizeof buf); 1478 if (rv == 0) 1479 break; 1480 if (rv < 0) { 1481 maybe_warn("read from fd %d", fd); 1482 break; 1483 } 1484 1485 if (write(STDOUT_FILENO, buf, rv) != rv) { 1486 maybe_warn("write to stdout"); 1487 break; 1488 } 1489 in_tot += rv; 1490 } 1491 1492 if (gsizep) 1493 *gsizep = in_tot; 1494 return (in_tot); 1495 } 1496 #endif 1497 1498 static void 1499 handle_stdin(void) 1500 { 1501 unsigned char header1[4]; 1502 off_t usize, gsize; 1503 enum filetype method; 1504 #ifndef NO_COMPRESS_SUPPORT 1505 FILE *in; 1506 #endif 1507 1508 #ifndef SMALL 1509 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1510 maybe_warnx("standard input is a terminal -- ignoring"); 1511 return; 1512 } 1513 #endif 1514 1515 if (lflag) { 1516 struct stat isb; 1517 1518 /* XXX could read the whole file, etc. */ 1519 if (fstat(STDIN_FILENO, &isb) < 0) { 1520 maybe_warn("fstat"); 1521 return; 1522 } 1523 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime); 1524 return; 1525 } 1526 1527 if (read(STDIN_FILENO, header1, sizeof header1) != sizeof header1) { 1528 maybe_warn("can't read stdin"); 1529 return; 1530 } 1531 1532 method = file_gettype(header1); 1533 switch (method) { 1534 default: 1535 #ifndef SMALL 1536 if (fflag == 0) { 1537 maybe_warnx("unknown compression format"); 1538 return; 1539 } 1540 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO); 1541 break; 1542 #endif 1543 case FT_GZIP: 1544 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1545 header1, sizeof header1, &gsize, "(stdin)"); 1546 break; 1547 #ifndef NO_BZIP2_SUPPORT 1548 case FT_BZIP2: 1549 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1550 header1, sizeof header1, &gsize); 1551 break; 1552 #endif 1553 #ifndef NO_COMPRESS_SUPPORT 1554 case FT_Z: 1555 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1556 maybe_warnx("zopen of stdin"); 1557 return; 1558 } 1559 1560 usize = zuncompress(in, stdout, header1, sizeof header1, &gsize); 1561 fclose(in); 1562 break; 1563 #endif 1564 } 1565 1566 #ifndef SMALL 1567 if (vflag && !tflag && usize != -1 && gsize != -1) 1568 print_verbage(NULL, NULL, usize, gsize); 1569 #endif 1570 1571 } 1572 1573 static void 1574 handle_stdout(void) 1575 { 1576 off_t gsize, usize; 1577 struct stat sb; 1578 time_t systime; 1579 uint32_t mtime; 1580 int ret; 1581 1582 #ifndef SMALL 1583 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1584 maybe_warnx("standard output is a terminal -- ignoring"); 1585 return; 1586 } 1587 #endif 1588 /* If stdin is a file use it's mtime, otherwise use current time */ 1589 ret = fstat(STDIN_FILENO, &sb); 1590 1591 #ifndef SMALL 1592 if (ret < 0) { 1593 maybe_warn("Can't stat stdin"); 1594 return; 1595 } 1596 #endif 1597 1598 if (S_ISREG(sb.st_mode)) 1599 mtime = (uint32_t)sb.st_mtime; 1600 else { 1601 systime = time(NULL); 1602 #ifndef SMALL 1603 if (systime == -1) { 1604 maybe_warn("time"); 1605 return; 1606 } 1607 #endif 1608 mtime = (uint32_t)systime; 1609 } 1610 1611 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime); 1612 #ifndef SMALL 1613 if (vflag && !tflag && usize != -1 && gsize != -1) 1614 print_verbage(NULL, NULL, usize, gsize); 1615 #endif 1616 } 1617 1618 /* do what is asked for, for the path name */ 1619 static void 1620 handle_pathname(char *path) 1621 { 1622 char *opath = path, *s = NULL; 1623 ssize_t len; 1624 int slen; 1625 struct stat sb; 1626 1627 /* check for stdout/stdin */ 1628 if (path[0] == '-' && path[1] == '\0') { 1629 if (dflag) 1630 handle_stdin(); 1631 else 1632 handle_stdout(); 1633 return; 1634 } 1635 1636 retry: 1637 if (stat(path, &sb) < 0) { 1638 /* lets try <path>.gz if we're decompressing */ 1639 if (dflag && s == NULL && errno == ENOENT) { 1640 len = strlen(path); 1641 slen = suffixes[0].ziplen; 1642 s = malloc(len + slen + 1); 1643 if (s == NULL) 1644 maybe_err("malloc"); 1645 memcpy(s, path, len); 1646 memcpy(s + len, suffixes[0].zipped, slen + 1); 1647 path = s; 1648 goto retry; 1649 } 1650 maybe_warn("can't stat: %s", opath); 1651 goto out; 1652 } 1653 1654 if (S_ISDIR(sb.st_mode)) { 1655 #ifndef SMALL 1656 if (rflag) 1657 handle_dir(path, &sb); 1658 else 1659 #endif 1660 maybe_warnx("%s is a directory", path); 1661 goto out; 1662 } 1663 1664 if (S_ISREG(sb.st_mode)) 1665 handle_file(path, &sb); 1666 else 1667 maybe_warnx("%s is not a regular file", path); 1668 1669 out: 1670 if (s) 1671 free(s); 1672 } 1673 1674 /* compress/decompress a file */ 1675 static void 1676 handle_file(char *file, struct stat *sbp) 1677 { 1678 off_t usize, gsize; 1679 char outfile[PATH_MAX]; 1680 1681 infile = file; 1682 if (dflag) { 1683 usize = file_uncompress(file, outfile, sizeof(outfile)); 1684 if (usize == -1) 1685 return; 1686 gsize = sbp->st_size; 1687 } else { 1688 gsize = file_compress(file, outfile, sizeof(outfile)); 1689 if (gsize == -1) 1690 return; 1691 usize = sbp->st_size; 1692 } 1693 1694 1695 #ifndef SMALL 1696 if (vflag && !tflag) 1697 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 1698 #endif 1699 } 1700 1701 #ifndef SMALL 1702 /* this is used with -r to recursively descend directories */ 1703 static void 1704 handle_dir(char *dir, struct stat *sbp) 1705 { 1706 char *path_argv[2]; 1707 FTS *fts; 1708 FTSENT *entry; 1709 1710 path_argv[0] = dir; 1711 path_argv[1] = 0; 1712 fts = fts_open(path_argv, FTS_PHYSICAL, NULL); 1713 if (fts == NULL) { 1714 warn("couldn't fts_open %s", dir); 1715 return; 1716 } 1717 1718 while ((entry = fts_read(fts))) { 1719 switch(entry->fts_info) { 1720 case FTS_D: 1721 case FTS_DP: 1722 continue; 1723 1724 case FTS_DNR: 1725 case FTS_ERR: 1726 case FTS_NS: 1727 maybe_warn("%s", entry->fts_path); 1728 continue; 1729 case FTS_F: 1730 handle_file(entry->fts_name, entry->fts_statp); 1731 } 1732 } 1733 (void)fts_close(fts); 1734 } 1735 #endif 1736 1737 /* print a ratio - size reduction as a fraction of uncompressed size */ 1738 static void 1739 print_ratio(off_t in, off_t out, FILE *where) 1740 { 1741 int percent10; /* 10 * percent */ 1742 off_t diff; 1743 char buff[8]; 1744 int len; 1745 1746 diff = in - out/2; 1747 if (diff <= 0) 1748 /* 1749 * Output is more than double size of input! print -99.9% 1750 * Quite possibly we've failed to get the original size. 1751 */ 1752 percent10 = -999; 1753 else { 1754 /* 1755 * We only need 12 bits of result from the final division, 1756 * so reduce the values until a 32bit division will suffice. 1757 */ 1758 while (in > 0x100000) { 1759 diff >>= 1; 1760 in >>= 1; 1761 } 1762 if (in != 0) 1763 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 1764 else 1765 percent10 = 0; 1766 } 1767 1768 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 1769 /* Move the '.' to before the last digit */ 1770 buff[len - 1] = buff[len - 2]; 1771 buff[len - 2] = '.'; 1772 fprintf(where, "%5s%%", buff); 1773 } 1774 1775 #ifndef SMALL 1776 /* print compression statistics, and the new name (if there is one!) */ 1777 static void 1778 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 1779 { 1780 if (file) 1781 fprintf(stderr, "%s:%s ", file, 1782 strlen(file) < 7 ? "\t\t" : "\t"); 1783 print_ratio(usize, gsize, stderr); 1784 if (nfile) 1785 fprintf(stderr, " -- replaced with %s", nfile); 1786 fprintf(stderr, "\n"); 1787 fflush(stderr); 1788 } 1789 1790 /* print test results */ 1791 static void 1792 print_test(const char *file, int ok) 1793 { 1794 1795 if (exit_value == 0 && ok == 0) 1796 exit_value = 1; 1797 fprintf(stderr, "%s:%s %s\n", file, 1798 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 1799 fflush(stderr); 1800 } 1801 #endif 1802 1803 /* print a file's info ala --list */ 1804 /* eg: 1805 compressed uncompressed ratio uncompressed_name 1806 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 1807 */ 1808 static void 1809 print_list(int fd, off_t out, const char *outfile, time_t ts) 1810 { 1811 static int first = 1; 1812 #ifndef SMALL 1813 static off_t in_tot, out_tot; 1814 uint32_t crc; 1815 #endif 1816 off_t in; 1817 int rv; 1818 1819 if (first) { 1820 #ifndef SMALL 1821 if (vflag) 1822 printf("method crc date time "); 1823 #endif 1824 if (qflag == 0) 1825 printf(" compressed uncompressed " 1826 "ratio uncompressed_name\n"); 1827 } 1828 first = 0; 1829 1830 /* print totals? */ 1831 #ifndef SMALL 1832 if (fd == -1) { 1833 in = in_tot; 1834 out = out_tot; 1835 } else 1836 #endif 1837 { 1838 /* read the last 4 bytes - this is the uncompressed size */ 1839 rv = lseek(fd, (off_t)(-8), SEEK_END); 1840 if (rv != -1) { 1841 unsigned char buf[8]; 1842 uint32_t usize; 1843 1844 if (read(fd, (char *)buf, sizeof(buf)) != sizeof(buf)) 1845 maybe_warn("read of uncompressed size"); 1846 usize = buf[4] | buf[5] << 8 | buf[6] << 16 | buf[7] << 24; 1847 in = (off_t)usize; 1848 #ifndef SMALL 1849 crc = buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24; 1850 #endif 1851 } 1852 } 1853 1854 #ifndef SMALL 1855 if (vflag && fd == -1) 1856 printf(" "); 1857 else if (vflag) { 1858 char *date = ctime(&ts); 1859 1860 /* skip the day, 1/100th second, and year */ 1861 date += 4; 1862 date[12] = 0; 1863 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 1864 } 1865 in_tot += in; 1866 out_tot += out; 1867 #endif 1868 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 1869 print_ratio(in, out, stdout); 1870 printf(" %s\n", outfile); 1871 } 1872 1873 /* display the usage of NetBSD gzip */ 1874 static void 1875 usage(void) 1876 { 1877 1878 fprintf(stderr, "%s\n", gzip_version); 1879 fprintf(stderr, 1880 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n" 1881 #ifndef SMALL 1882 " -c --stdout write to stdout, keep original files\n" 1883 " --to-stdout\n" 1884 " -d --decompress uncompress files\n" 1885 " --uncompress\n" 1886 " -f --force force overwriting & compress links\n" 1887 " -h --help display this help\n" 1888 " -n --no-name don't save original file name or time stamp\n" 1889 " -N --name save or restore original file name and time stamp\n" 1890 " -q --quiet output no warnings\n" 1891 " -r --recursive recursively compress files in directories\n" 1892 " -S .suf use suffix .suf instead of .gz\n" 1893 " --suffix .suf\n" 1894 " -t --test test compressed file\n" 1895 " -v --verbose print extra statistics\n" 1896 " -V --version display program version\n" 1897 " -1 --fast fastest (worst) compression\n" 1898 " -2 .. -8 set compression level\n" 1899 " -9 --best best (slowest) compression\n", 1900 #else 1901 , 1902 #endif 1903 getprogname()); 1904 exit(0); 1905 } 1906 1907 /* display the version of NetBSD gzip */ 1908 static void 1909 display_version(void) 1910 { 1911 1912 fprintf(stderr, "%s\n", gzip_version); 1913 exit(0); 1914 } 1915 1916 #ifndef NO_BZIP2_SUPPORT 1917 #include "unbzip2.c" 1918 #endif 1919 #ifndef NO_COMPRESS_SUPPORT 1920 #include "zuncompress.c" 1921 #endif 1922