1 /* $NetBSD: gzip.c,v 1.68 2004/10/08 12:46:24 dsl Exp $ */ 2 3 /* 4 * Copyright (c) 1997, 1998, 2003, 2004 Matthew R. Green 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 #ifndef lint 33 __COPYRIGHT("@(#) Copyright (c) 1997, 1998, 2003, 2004 Matthew R. Green\n\ 34 All rights reserved.\n"); 35 __RCSID("$NetBSD: gzip.c,v 1.68 2004/10/08 12:46:24 dsl Exp $"); 36 #endif /* not lint */ 37 38 /* 39 * gzip.c -- GPL free gzip using zlib. 40 * 41 * RFC 1950 covers the zlib format 42 * RFC 1951 covers the deflate format 43 * RFC 1952 covers the gzip format 44 * 45 * TODO: 46 * - use mmap where possible 47 * - handle some signals better (remove outfile?) 48 * - make bzip2/compress -v/-t/-l support work as well as possible 49 */ 50 51 #include <sys/param.h> 52 #include <sys/stat.h> 53 #include <sys/time.h> 54 55 #include <inttypes.h> 56 #include <unistd.h> 57 #include <stdio.h> 58 #include <string.h> 59 #include <stdlib.h> 60 #include <err.h> 61 #include <errno.h> 62 #include <fcntl.h> 63 #include <zlib.h> 64 #include <fts.h> 65 #include <libgen.h> 66 #include <stdarg.h> 67 #include <getopt.h> 68 69 #ifndef PRIdOFF 70 #define PRIdOFF PRId64 71 #endif 72 73 /* what type of file are we dealing with */ 74 enum filetype { 75 FT_GZIP, 76 #ifndef NO_BZIP2_SUPPORT 77 FT_BZIP2, 78 #endif 79 #ifndef NO_COMPRESS_SUPPORT 80 FT_Z, 81 #endif 82 FT_LAST, 83 FT_UNKNOWN 84 }; 85 86 #ifndef NO_BZIP2_SUPPORT 87 #include <bzlib.h> 88 89 #define BZ2_SUFFIX ".bz2" 90 #define BZIP2_MAGIC "\102\132\150" 91 #endif 92 93 #ifndef NO_COMPRESS_SUPPORT 94 #define Z_SUFFIX ".Z" 95 #define Z_MAGIC "\037\235" 96 #endif 97 98 #define GZ_SUFFIX ".gz" 99 100 #define BUFLEN (64 * 1024) 101 102 #define GZIP_MAGIC0 0x1F 103 #define GZIP_MAGIC1 0x8B 104 #define GZIP_OMAGIC1 0x9E 105 106 #define GZIP_TIMESTAMP (off_t)4 107 #define GZIP_ORIGNAME (off_t)10 108 109 #define HEAD_CRC 0x02 110 #define EXTRA_FIELD 0x04 111 #define ORIG_NAME 0x08 112 #define COMMENT 0x10 113 114 #define OS_CODE 3 /* Unix */ 115 116 typedef struct { 117 const char *zipped; 118 int ziplen; 119 const char *normal; /* for unzip - must not be longer than zipped */ 120 } suffixes_t; 121 static suffixes_t suffixes[] = { 122 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N} 123 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */ 124 #ifndef SMALL 125 SUFFIX(GZ_SUFFIX, ""), 126 SUFFIX(".z", ""), 127 SUFFIX("-gz", ""), 128 SUFFIX("-z", ""), 129 SUFFIX("_z", ""), 130 SUFFIX(".taz", ".tar"), 131 SUFFIX(".tgz", ".tar"), 132 #ifndef NO_BZIP2_SUPPORT 133 SUFFIX(BZ2_SUFFIX, ""), 134 #endif 135 #ifndef NO_COMPRESS_SUPPORT 136 SUFFIX(Z_SUFFIX, ""), 137 #endif 138 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */ 139 #endif /* SMALL */ 140 #undef SUFFIX 141 }; 142 #define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0]) 143 144 static const char gzip_version[] = "NetBSD gzip 20040830"; 145 146 static int cflag; /* stdout mode */ 147 static int dflag; /* decompress mode */ 148 static int lflag; /* list mode */ 149 static int numflag = 6; /* gzip -1..-9 value */ 150 151 #ifndef SMALL 152 static int fflag; /* force mode */ 153 static int nflag; /* don't save name/timestamp */ 154 static int Nflag; /* don't restore name/timestamp */ 155 static int qflag; /* quiet mode */ 156 static int rflag; /* recursive mode */ 157 static int tflag; /* test */ 158 static int vflag; /* verbose mode */ 159 #else 160 #define qflag 0 161 #define tflag 0 162 #endif 163 164 static int exit_value = 0; /* exit value */ 165 166 static char *infile; /* name of file coming in */ 167 168 static void maybe_err(const char *fmt, ...) 169 __attribute__((__format__(__printf__, 1, 2))); 170 #ifndef NO_BZIP2_SUPPORT 171 static void maybe_errx(const char *fmt, ...) 172 __attribute__((__format__(__printf__, 1, 2))); 173 #endif 174 static void maybe_warn(const char *fmt, ...) 175 __attribute__((__format__(__printf__, 1, 2))); 176 static void maybe_warnx(const char *fmt, ...) 177 __attribute__((__format__(__printf__, 1, 2))); 178 static enum filetype file_gettype(u_char *); 179 #ifdef SMALL 180 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz) 181 #endif 182 static off_t gz_compress(int, int, off_t *, const char *, uint32_t); 183 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *); 184 static off_t file_compress(char *, char *, size_t); 185 static off_t file_uncompress(char *, char *, size_t); 186 static void handle_pathname(char *); 187 static void handle_file(char *, struct stat *); 188 static void handle_stdin(void); 189 static void handle_stdout(void); 190 static void print_ratio(off_t, off_t, FILE *); 191 static void print_list(int fd, off_t, const char *, time_t); 192 static void usage(void); 193 static void display_version(void); 194 static const suffixes_t *check_suffix(char *, int); 195 196 #ifdef SMALL 197 #define unlink_input(f, sb) unlink(f) 198 #else 199 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd); 200 static void prepend_gzip(char *, int *, char ***); 201 static void handle_dir(char *, struct stat *); 202 static void print_verbage(const char *, const char *, off_t, off_t); 203 static void print_test(const char *, int); 204 static void copymodes(const char *, struct stat *); 205 static int check_outfile(const char *outfile, struct stat *sb); 206 #endif 207 208 #ifndef NO_BZIP2_SUPPORT 209 static off_t unbzip2(int, int, char *, size_t, off_t *); 210 #endif 211 212 #ifndef NO_COMPRESS_SUPPORT 213 static FILE *zdopen(int); 214 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *); 215 #endif 216 217 int main(int, char *p[]); 218 219 #ifdef SMALL 220 #define getopt_long(a,b,c,d,e) getopt(a,b,c) 221 #else 222 static const struct option longopts[] = { 223 { "stdout", no_argument, 0, 'c' }, 224 { "to-stdout", no_argument, 0, 'c' }, 225 { "decompress", no_argument, 0, 'd' }, 226 { "uncompress", no_argument, 0, 'd' }, 227 { "force", no_argument, 0, 'f' }, 228 { "help", no_argument, 0, 'h' }, 229 { "list", no_argument, 0, 'l' }, 230 { "no-name", no_argument, 0, 'n' }, 231 { "name", no_argument, 0, 'N' }, 232 { "quiet", no_argument, 0, 'q' }, 233 { "recursive", no_argument, 0, 'r' }, 234 { "suffix", required_argument, 0, 'S' }, 235 { "test", no_argument, 0, 't' }, 236 { "verbose", no_argument, 0, 'v' }, 237 { "version", no_argument, 0, 'V' }, 238 { "fast", no_argument, 0, '1' }, 239 { "best", no_argument, 0, '9' }, 240 #if 0 241 /* 242 * This is what else GNU gzip implements. --ascii isn't useful 243 * on NetBSD, and I don't care to have a --license. 244 */ 245 { "ascii", no_argument, 0, 'a' }, 246 { "license", no_argument, 0, 'L' }, 247 #endif 248 { NULL, no_argument, 0, 0 }, 249 }; 250 #endif 251 252 int 253 main(int argc, char **argv) 254 { 255 const char *progname = getprogname(); 256 #ifndef SMALL 257 char *gzip; 258 int len; 259 #endif 260 int ch; 261 262 /* XXX set up signals */ 263 264 #ifndef SMALL 265 if ((gzip = getenv("GZIP")) != NULL) 266 prepend_gzip(gzip, &argc, &argv); 267 #endif 268 269 /* 270 * XXX 271 * handle being called `gunzip', `zcat' and `gzcat' 272 */ 273 if (strcmp(progname, "gunzip") == 0) 274 dflag = 1; 275 else if (strcmp(progname, "zcat") == 0 || 276 strcmp(progname, "gzcat") == 0) 277 dflag = cflag = 1; 278 279 #ifdef SMALL 280 #define OPT_LIST "cdhHltV123456789" 281 #else 282 #define OPT_LIST "cdfhHlnNqrS:tvV123456789" 283 #endif 284 285 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) { 286 switch (ch) { 287 case 'c': 288 cflag = 1; 289 break; 290 case 'd': 291 dflag = 1; 292 break; 293 case 'l': 294 lflag = 1; 295 dflag = 1; 296 break; 297 case 'V': 298 display_version(); 299 /* NOTREACHED */ 300 case '1': case '2': case '3': 301 case '4': case '5': case '6': 302 case '7': case '8': case '9': 303 numflag = ch - '0'; 304 break; 305 #ifndef SMALL 306 case 'f': 307 fflag = 1; 308 break; 309 case 'n': 310 nflag = 1; 311 Nflag = 0; 312 break; 313 case 'N': 314 nflag = 0; 315 Nflag = 1; 316 break; 317 case 'q': 318 qflag = 1; 319 break; 320 case 'r': 321 rflag = 1; 322 break; 323 case 'S': 324 len = strlen(optarg); 325 if (len != 0) { 326 suffixes[0].zipped = optarg; 327 suffixes[0].ziplen = len; 328 } else { 329 suffixes[NUM_SUFFIXES - 1].zipped = ""; 330 suffixes[NUM_SUFFIXES - 1].ziplen = 0; 331 } 332 break; 333 case 't': 334 cflag = 1; 335 tflag = 1; 336 dflag = 1; 337 break; 338 case 'v': 339 vflag = 1; 340 break; 341 #endif 342 default: 343 usage(); 344 /* NOTREACHED */ 345 } 346 } 347 argv += optind; 348 argc -= optind; 349 350 if (argc == 0) { 351 if (dflag) /* stdin mode */ 352 handle_stdin(); 353 else /* stdout mode */ 354 handle_stdout(); 355 } else { 356 do { 357 handle_pathname(argv[0]); 358 } while (*++argv); 359 } 360 #ifndef SMALL 361 if (qflag == 0 && lflag && argc > 1) 362 print_list(-1, 0, "(totals)", 0); 363 #endif 364 exit(exit_value); 365 } 366 367 /* maybe print a warning */ 368 void 369 maybe_warn(const char *fmt, ...) 370 { 371 va_list ap; 372 373 if (qflag == 0) { 374 va_start(ap, fmt); 375 vwarn(fmt, ap); 376 va_end(ap); 377 } 378 if (exit_value == 0) 379 exit_value = 1; 380 } 381 382 /* ... without an errno. */ 383 void 384 maybe_warnx(const char *fmt, ...) 385 { 386 va_list ap; 387 388 if (qflag == 0) { 389 va_start(ap, fmt); 390 vwarnx(fmt, ap); 391 va_end(ap); 392 } 393 if (exit_value == 0) 394 exit_value = 1; 395 } 396 397 /* maybe print an error */ 398 void 399 maybe_err(const char *fmt, ...) 400 { 401 va_list ap; 402 403 if (qflag == 0) { 404 va_start(ap, fmt); 405 vwarn(fmt, ap); 406 va_end(ap); 407 } 408 exit(2); 409 } 410 411 #ifndef NO_BZIP2_SUPPORT 412 /* ... without an errno. */ 413 void 414 maybe_errx(const char *fmt, ...) 415 { 416 va_list ap; 417 418 if (qflag == 0) { 419 va_start(ap, fmt); 420 vwarnx(fmt, ap); 421 va_end(ap); 422 } 423 exit(2); 424 } 425 #endif 426 427 #ifndef SMALL 428 /* split up $GZIP and prepend it to the argument list */ 429 static void 430 prepend_gzip(char *gzip, int *argc, char ***argv) 431 { 432 char *s, **nargv, **ac; 433 int nenvarg = 0, i; 434 435 /* scan how many arguments there are */ 436 for (s = gzip; *s; s++) { 437 if (*s == ' ' || *s == '\t') 438 continue; 439 nenvarg++; 440 for (; *s; s++) 441 if (*s == ' ' || *s == '\t') 442 break; 443 if (*s == 0x0) 444 break; 445 } 446 /* punt early */ 447 if (nenvarg == 0) 448 return; 449 450 *argc += nenvarg; 451 ac = *argv; 452 453 nargv = (char **)malloc((*argc + 1) * sizeof(char *)); 454 if (nargv == NULL) 455 maybe_err("malloc"); 456 457 /* stash this away */ 458 *argv = nargv; 459 460 /* copy the program name first */ 461 i = 0; 462 nargv[i++] = *(ac++); 463 464 /* take a copy of $GZIP and add it to the array */ 465 s = strdup(gzip); 466 if (s == NULL) 467 maybe_err("strdup"); 468 for (; *s; s++) { 469 if (*s == ' ' || *s == '\t') 470 continue; 471 nargv[i++] = s; 472 for (; *s; s++) 473 if (*s == ' ' || *s == '\t') { 474 *s = 0; 475 break; 476 } 477 } 478 479 /* copy the original arguments and a NULL */ 480 while (*ac) 481 nargv[i++] = *(ac++); 482 nargv[i] = NULL; 483 } 484 #endif 485 486 /* compress input to output. Return bytes read, -1 on error */ 487 static off_t 488 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime) 489 { 490 z_stream z; 491 char *outbufp, *inbufp; 492 off_t in_tot = 0, out_tot = 0; 493 ssize_t in_size; 494 int i, error; 495 uLong crc; 496 #ifdef SMALL 497 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0, 498 0, 0, 0, 0, 499 0, OS_CODE }; 500 #endif 501 502 outbufp = malloc(BUFLEN); 503 inbufp = malloc(BUFLEN); 504 if (outbufp == NULL || inbufp == NULL) { 505 maybe_err("malloc failed"); 506 goto out; 507 } 508 509 memset(&z, 0, sizeof z); 510 z.zalloc = Z_NULL; 511 z.zfree = Z_NULL; 512 z.opaque = 0; 513 514 #ifdef SMALL 515 memcpy(outbufp, header, sizeof header); 516 i = sizeof header; 517 #else 518 if (nflag != 0) { 519 mtime = 0; 520 origname = ""; 521 } 522 523 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s", 524 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 525 *origname ? ORIG_NAME : 0, 526 mtime & 0xff, 527 (mtime >> 8) & 0xff, 528 (mtime >> 16) & 0xff, 529 (mtime >> 24) & 0xff, 530 numflag == 1 ? 4 : numflag == 9 ? 2 : 0, 531 OS_CODE, origname); 532 if (i >= BUFLEN) 533 /* this need PATH_MAX > BUFLEN ... */ 534 maybe_err("snprintf"); 535 if (*origname) 536 i++; 537 #endif 538 539 z.next_out = outbufp + i; 540 z.avail_out = BUFLEN - i; 541 542 error = deflateInit2(&z, numflag, Z_DEFLATED, 543 -MAX_WBITS, 8, Z_DEFAULT_STRATEGY); 544 if (error != Z_OK) { 545 maybe_warnx("deflateInit2 failed"); 546 in_tot = -1; 547 goto out; 548 } 549 550 crc = crc32(0L, Z_NULL, 0); 551 for (;;) { 552 if (z.avail_out == 0) { 553 if (write(out, outbufp, BUFLEN) != BUFLEN) { 554 maybe_warn("write"); 555 in_tot = -1; 556 goto out; 557 } 558 559 out_tot += BUFLEN; 560 z.next_out = outbufp; 561 z.avail_out = BUFLEN; 562 } 563 564 if (z.avail_in == 0) { 565 in_size = read(in, inbufp, BUFLEN); 566 if (in_size < 0) { 567 maybe_warn("read"); 568 in_tot = -1; 569 goto out; 570 } 571 if (in_size == 0) 572 break; 573 574 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size); 575 in_tot += in_size; 576 z.next_in = inbufp; 577 z.avail_in = in_size; 578 } 579 580 error = deflate(&z, Z_NO_FLUSH); 581 if (error != Z_OK && error != Z_STREAM_END) { 582 maybe_warnx("deflate failed"); 583 in_tot = -1; 584 goto out; 585 } 586 } 587 588 /* clean up */ 589 for (;;) { 590 size_t len; 591 592 error = deflate(&z, Z_FINISH); 593 if (error != Z_OK && error != Z_STREAM_END) { 594 maybe_warnx("deflate failed"); 595 in_tot = -1; 596 goto out; 597 } 598 599 len = (char *)z.next_out - outbufp; 600 601 if (write(out, outbufp, len) != len) { 602 maybe_warn("write"); 603 out_tot = -1; 604 goto out; 605 } 606 out_tot += len; 607 z.next_out = outbufp; 608 z.avail_out = BUFLEN; 609 610 if (error == Z_STREAM_END) 611 break; 612 } 613 614 if (deflateEnd(&z) != Z_OK) { 615 maybe_warnx("deflateEnd failed"); 616 in_tot = -1; 617 goto out; 618 } 619 620 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c", 621 (int)crc & 0xff, 622 (int)(crc >> 8) & 0xff, 623 (int)(crc >> 16) & 0xff, 624 (int)(crc >> 24) & 0xff, 625 (int)in_tot & 0xff, 626 (int)(in_tot >> 8) & 0xff, 627 (int)(in_tot >> 16) & 0xff, 628 (int)(in_tot >> 24) & 0xff); 629 if (i != 8) 630 maybe_err("snprintf"); 631 if (write(out, outbufp, i) != i) { 632 maybe_warn("write"); 633 in_tot = -1; 634 } else 635 out_tot += i; 636 637 out: 638 if (inbufp != NULL) 639 free(inbufp); 640 if (outbufp != NULL) 641 free(outbufp); 642 if (gsizep) 643 *gsizep = out_tot; 644 return in_tot; 645 } 646 647 /* 648 * uncompress input to output then close the input. return the 649 * uncompressed size written, and put the compressed sized read 650 * into `*gsizep'. 651 */ 652 static off_t 653 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep, 654 const char *filename) 655 { 656 z_stream z; 657 char *outbufp, *inbufp; 658 off_t out_tot, in_tot; 659 uint32_t out_sub_tot; 660 enum { 661 GZSTATE_MAGIC0, 662 GZSTATE_MAGIC1, 663 GZSTATE_METHOD, 664 GZSTATE_FLAGS, 665 GZSTATE_SKIPPING, 666 GZSTATE_EXTRA, 667 GZSTATE_EXTRA2, 668 GZSTATE_EXTRA3, 669 GZSTATE_ORIGNAME, 670 GZSTATE_COMMENT, 671 GZSTATE_HEAD_CRC1, 672 GZSTATE_HEAD_CRC2, 673 GZSTATE_INIT, 674 GZSTATE_READ, 675 GZSTATE_CRC, 676 GZSTATE_LEN, 677 } state = GZSTATE_MAGIC0; 678 int flags = 0, skip_count = 0; 679 int error, done_reading = 0; 680 uLong crc; 681 ssize_t wr; 682 683 #define ADVANCE() { z.next_in++; z.avail_in--; } 684 685 if ((outbufp = malloc(BUFLEN)) == NULL) { 686 maybe_err("malloc failed"); 687 goto out2; 688 } 689 if ((inbufp = malloc(BUFLEN)) == NULL) { 690 maybe_err("malloc failed"); 691 goto out1; 692 } 693 694 memset(&z, 0, sizeof z); 695 z.avail_in = prelen; 696 z.next_in = pre; 697 z.avail_out = BUFLEN; 698 z.next_out = outbufp; 699 z.zalloc = NULL; 700 z.zfree = NULL; 701 z.opaque = 0; 702 703 in_tot = prelen; 704 out_tot = 0; 705 706 for (;;) { 707 if (z.avail_in == 0 && done_reading == 0) { 708 size_t in_size = read(in, inbufp, BUFLEN); 709 710 if (in_size == -1) { 711 #ifndef SMALL 712 if (tflag && vflag) 713 print_test(filename, 0); 714 #endif 715 maybe_warn("failed to read stdin"); 716 out_tot = -1; 717 goto stop; 718 } else if (in_size == 0) 719 done_reading = 1; 720 721 z.avail_in = in_size; 722 z.next_in = inbufp; 723 724 in_tot += in_size; 725 } 726 if (z.avail_in == 0) { 727 if (done_reading && state != GZSTATE_MAGIC0) 728 maybe_warnx("%s: unexpected end of file", 729 filename); 730 goto stop; 731 } 732 switch (state) { 733 case GZSTATE_MAGIC0: 734 if (*z.next_in != GZIP_MAGIC0) { 735 maybe_warnx("input not gziped (MAGIC0)"); 736 out_tot = -1; 737 goto stop; 738 } 739 ADVANCE(); 740 state++; 741 out_sub_tot = 0; 742 crc = crc32(0L, Z_NULL, 0); 743 break; 744 745 case GZSTATE_MAGIC1: 746 if (*z.next_in != GZIP_MAGIC1 && 747 *z.next_in != GZIP_OMAGIC1) { 748 maybe_warnx("input not gziped (MAGIC1)"); 749 out_tot = -1; 750 goto stop; 751 } 752 ADVANCE(); 753 state++; 754 break; 755 756 case GZSTATE_METHOD: 757 if (*z.next_in != Z_DEFLATED) { 758 maybe_warnx("unknown compression method"); 759 out_tot = -1; 760 goto stop; 761 } 762 ADVANCE(); 763 state++; 764 break; 765 766 case GZSTATE_FLAGS: 767 flags = *z.next_in; 768 ADVANCE(); 769 skip_count = 6; 770 state++; 771 break; 772 773 case GZSTATE_SKIPPING: 774 if (skip_count > 0) { 775 skip_count--; 776 ADVANCE(); 777 } else 778 state++; 779 break; 780 781 case GZSTATE_EXTRA: 782 if ((flags & EXTRA_FIELD) == 0) { 783 state = GZSTATE_ORIGNAME; 784 break; 785 } 786 skip_count = *z.next_in; 787 ADVANCE(); 788 state++; 789 break; 790 791 case GZSTATE_EXTRA2: 792 skip_count |= ((*z.next_in) << 8); 793 ADVANCE(); 794 state++; 795 break; 796 797 case GZSTATE_EXTRA3: 798 if (skip_count > 0) { 799 skip_count--; 800 ADVANCE(); 801 } else 802 state++; 803 break; 804 805 case GZSTATE_ORIGNAME: 806 if ((flags & ORIG_NAME) == 0) { 807 state++; 808 break; 809 } 810 if (*z.next_in == 0) 811 state++; 812 ADVANCE(); 813 break; 814 815 case GZSTATE_COMMENT: 816 if ((flags & COMMENT) == 0) { 817 state++; 818 break; 819 } 820 if (*z.next_in == 0) 821 state++; 822 ADVANCE(); 823 break; 824 825 case GZSTATE_HEAD_CRC1: 826 if (flags & HEAD_CRC) 827 skip_count = 2; 828 else 829 skip_count = 0; 830 state++; 831 break; 832 833 case GZSTATE_HEAD_CRC2: 834 if (skip_count > 0) { 835 skip_count--; 836 ADVANCE(); 837 } else 838 state++; 839 break; 840 841 case GZSTATE_INIT: 842 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) { 843 maybe_warnx("failed to inflateInit"); 844 out_tot = -1; 845 goto stop; 846 } 847 state++; 848 break; 849 850 case GZSTATE_READ: 851 error = inflate(&z, Z_FINISH); 852 /* Z_BUF_ERROR goes with Z_FINISH... */ 853 if (error != Z_STREAM_END && error != Z_BUF_ERROR) 854 /* Just need more input */ 855 break; 856 wr = BUFLEN - z.avail_out; 857 858 if (wr != 0) { 859 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 860 if ( 861 #ifndef SMALL 862 /* don't write anything with -t */ 863 tflag == 0 && 864 #endif 865 write(out, outbufp, wr) != wr) { 866 maybe_warn("error writing to output"); 867 out_tot = -1; 868 goto stop; 869 } 870 871 out_tot += wr; 872 out_sub_tot += wr; 873 } 874 875 if (error == Z_STREAM_END) { 876 inflateEnd(&z); 877 state++; 878 } 879 880 z.next_out = outbufp; 881 z.avail_out = BUFLEN; 882 883 break; 884 case GZSTATE_CRC: 885 { 886 static int empty_buffer = 0; 887 uLong origcrc; 888 889 if (z.avail_in < 4) { 890 if (!done_reading && empty_buffer++ < 4) 891 continue; 892 maybe_warnx("truncated input"); 893 out_tot = -1; 894 goto stop; 895 } 896 empty_buffer = 0; 897 origcrc = ((unsigned)z.next_in[0] & 0xff) | 898 ((unsigned)z.next_in[1] & 0xff) << 8 | 899 ((unsigned)z.next_in[2] & 0xff) << 16 | 900 ((unsigned)z.next_in[3] & 0xff) << 24; 901 if (origcrc != crc) { 902 maybe_warnx("invalid compressed" 903 " data--crc error"); 904 out_tot = -1; 905 goto stop; 906 } 907 } 908 909 z.avail_in -= 4; 910 z.next_in += 4; 911 912 if (!z.avail_in) 913 goto stop; 914 state++; 915 break; 916 case GZSTATE_LEN: 917 { 918 static int empty_buffer = 0; 919 uLong origlen; 920 921 if (z.avail_in < 4) { 922 if (!done_reading && empty_buffer++ < 4) 923 continue; 924 maybe_warnx("truncated input"); 925 out_tot = -1; 926 goto stop; 927 } 928 empty_buffer = 0; 929 origlen = ((unsigned)z.next_in[0] & 0xff) | 930 ((unsigned)z.next_in[1] & 0xff) << 8 | 931 ((unsigned)z.next_in[2] & 0xff) << 16 | 932 ((unsigned)z.next_in[3] & 0xff) << 24; 933 934 if (origlen != out_sub_tot) { 935 maybe_warnx("invalid compressed" 936 " data--length error"); 937 out_tot = -1; 938 goto stop; 939 } 940 } 941 942 z.avail_in -= 4; 943 z.next_in += 4; 944 945 if (error < 0) { 946 maybe_warnx("decompression error"); 947 out_tot = -1; 948 goto stop; 949 } 950 state = GZSTATE_MAGIC0; 951 break; 952 } 953 continue; 954 stop: 955 break; 956 } 957 if (state > GZSTATE_INIT) 958 inflateEnd(&z); 959 960 #ifndef SMALL 961 if (tflag && vflag) 962 print_test(filename, out_tot != -1); 963 #endif 964 965 free(inbufp); 966 out1: 967 free(outbufp); 968 out2: 969 if (gsizep) 970 *gsizep = in_tot; 971 return (out_tot); 972 } 973 974 #ifndef SMALL 975 /* 976 * set the owner, mode, flags & utimes for a file 977 */ 978 static void 979 copymodes(const char *file, struct stat *sbp) 980 { 981 struct timeval times[2]; 982 983 /* 984 * If we have no info on the input, give this file some 985 * default values and return.. 986 */ 987 if (sbp == NULL) { 988 mode_t mask = umask(022); 989 990 (void)chmod(file, DEFFILEMODE & ~mask); 991 (void)umask(mask); 992 return; 993 } 994 995 /* if the chown fails, remove set-id bits as-per compress(1) */ 996 if (chown(file, sbp->st_uid, sbp->st_gid) < 0) { 997 if (errno != EPERM) 998 maybe_warn("couldn't chown: %s", file); 999 sbp->st_mode &= ~(S_ISUID|S_ISGID); 1000 } 1001 1002 /* we only allow set-id and the 9 normal permission bits */ 1003 sbp->st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1004 if (chmod(file, sbp->st_mode) < 0) 1005 maybe_warn("couldn't chmod: %s", file); 1006 1007 /* only try flags if they exist already */ 1008 if (sbp->st_flags != 0 && chflags(file, sbp->st_flags) < 0) 1009 maybe_warn("couldn't chflags: %s", file); 1010 1011 TIMESPEC_TO_TIMEVAL(×[0], &sbp->st_atimespec); 1012 TIMESPEC_TO_TIMEVAL(×[1], &sbp->st_mtimespec); 1013 if (utimes(file, times) < 0) 1014 maybe_warn("couldn't utimes: %s", file); 1015 } 1016 #endif 1017 1018 /* what sort of file is this? */ 1019 static enum filetype 1020 file_gettype(u_char *buf) 1021 { 1022 1023 if (buf[0] == GZIP_MAGIC0 && 1024 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1025 return FT_GZIP; 1026 else 1027 #ifndef NO_BZIP2_SUPPORT 1028 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1029 buf[3] >= '0' && buf[3] <= '9') 1030 return FT_BZIP2; 1031 else 1032 #endif 1033 #ifndef NO_COMPRESS_SUPPORT 1034 if (memcmp(buf, Z_MAGIC, 2) == 0) 1035 return FT_Z; 1036 else 1037 #endif 1038 return FT_UNKNOWN; 1039 } 1040 1041 #ifndef SMALL 1042 /* check the outfile is OK. */ 1043 static int 1044 check_outfile(const char *outfile, struct stat *sb) 1045 { 1046 int ok = 1; 1047 1048 if (lflag == 0 && stat(outfile, sb) == 0) { 1049 if (fflag) 1050 unlink(outfile); 1051 else if (isatty(STDIN_FILENO)) { 1052 char ans[10] = { 'n', '\0' }; /* default */ 1053 1054 fprintf(stderr, "%s already exists -- do you wish to " 1055 "overwrite (y or n)? " , outfile); 1056 (void)fgets(ans, sizeof(ans) - 1, stdin); 1057 if (ans[0] != 'y' && ans[0] != 'Y') { 1058 fprintf(stderr, "\tnot overwritting\n"); 1059 ok = 0; 1060 } else 1061 unlink(outfile); 1062 } else { 1063 maybe_warnx("%s already exists -- skipping", outfile); 1064 ok = 0; 1065 } 1066 } 1067 return ok; 1068 } 1069 1070 static void 1071 unlink_input(const char *file, struct stat *sb) 1072 { 1073 struct stat nsb; 1074 1075 if (stat(file, &nsb) != 0) 1076 /* Must be gone alrady */ 1077 return; 1078 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1079 /* Definitely a different file */ 1080 return; 1081 unlink(file); 1082 } 1083 #endif 1084 1085 static const suffixes_t * 1086 check_suffix(char *file, int xlate) 1087 { 1088 const suffixes_t *s; 1089 int len = strlen(file); 1090 char *sp; 1091 1092 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1093 /* if it doesn't fit in "a.suf", don't bother */ 1094 if (s->ziplen >= len) 1095 continue; 1096 sp = file + len - s->ziplen; 1097 if (strcmp(s->zipped, sp) != 0) 1098 continue; 1099 if (xlate) 1100 strcpy(sp, s->normal); 1101 return s; 1102 } 1103 return NULL; 1104 } 1105 1106 /* 1107 * compress the given file: create a corresponding .gz file and remove the 1108 * original. 1109 */ 1110 static off_t 1111 file_compress(char *file, char *outfile, size_t outsize) 1112 { 1113 int in; 1114 int out; 1115 off_t size, insize; 1116 #ifndef SMALL 1117 struct stat isb, osb; 1118 const suffixes_t *suff; 1119 #endif 1120 1121 in = open(file, O_RDONLY); 1122 if (in == -1) { 1123 maybe_warn("can't open %s", file); 1124 return -1; 1125 } 1126 1127 if (cflag == 0) { 1128 #ifndef SMALL 1129 if (stat(file, &isb) == 0) { 1130 if (isb.st_nlink > 1 && fflag == 0) { 1131 maybe_warnx("%s has %d other link%s -- " 1132 "skipping", file, isb.st_nlink - 1, 1133 isb.st_nlink == 1 ? "" : "s"); 1134 close(in); 1135 return -1; 1136 } 1137 } 1138 1139 if (fflag == 0 && (suff = check_suffix(file, 0)) 1140 && suff->zipped[0] != 0) { 1141 maybe_warnx("%s already has %s suffix -- unchanged", 1142 file, suff->zipped); 1143 close(in); 1144 return -1; 1145 } 1146 #endif 1147 1148 /* Add (usually) .gz to filename */ 1149 if (snprintf(outfile, outsize, "%s%s", 1150 file, suffixes[0].zipped) >= outsize) 1151 memcpy(outfile - suffixes[0].ziplen - 1, 1152 suffixes[0].zipped, suffixes[0].ziplen + 1); 1153 1154 #ifndef SMALL 1155 if (check_outfile(outfile, &osb) == 0) { 1156 close(in); 1157 return -1; 1158 } 1159 #endif 1160 } 1161 1162 if (cflag == 0) { 1163 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600); 1164 if (out == -1) { 1165 maybe_warn("could not create output: %s", outfile); 1166 fclose(stdin); 1167 return -1; 1168 } 1169 } else 1170 out = STDOUT_FILENO; 1171 1172 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1173 1174 (void)close(in); 1175 1176 /* 1177 * If there was an error, insize will be -1. 1178 * If we compressed to stdout, just return the size. 1179 * Otherwise stat the file and check it is the correct size. 1180 * We only blow away the file if we can stat the output and it 1181 * has the expected size. 1182 */ 1183 if (cflag != 0) 1184 return insize == -1 ? -1 : size; 1185 1186 if (close(out) == -1) 1187 maybe_warn("couldn't close ouput"); 1188 1189 #ifndef SMALL 1190 if (stat(outfile, &osb) < 0) { 1191 maybe_warn("couldn't stat: %s", outfile); 1192 goto bad_outfile; 1193 } 1194 1195 if (osb.st_size != size) { 1196 maybe_warnx("output file: %s wrong size (%" PRIdOFF 1197 " != %" PRIdOFF "), deleting", 1198 outfile, osb.st_size, size); 1199 goto bad_outfile; 1200 } 1201 1202 copymodes(outfile, &isb); 1203 #endif 1204 1205 /* output is good, ok to delete input */ 1206 unlink_input(file, &isb); 1207 return size; 1208 1209 #ifndef SMALL 1210 bad_outfile: 1211 maybe_warnx("leaving original %s", file); 1212 unlink(outfile); 1213 return size; 1214 #endif 1215 } 1216 1217 /* uncompress the given file and remove the original */ 1218 static off_t 1219 file_uncompress(char *file, char *outfile, size_t outsize) 1220 { 1221 struct stat isb, osb; 1222 off_t size; 1223 ssize_t rbytes; 1224 unsigned char header1[4]; 1225 enum filetype method; 1226 int fd, zfd = -1; 1227 #ifndef SMALL 1228 time_t timestamp = 0; 1229 unsigned char name[PATH_MAX + 1]; 1230 #endif 1231 1232 /* gather the old name info */ 1233 1234 fd = open(file, O_RDONLY); 1235 if (fd < 0) { 1236 maybe_warn("can't open %s", file); 1237 goto lose; 1238 } 1239 1240 strlcpy(outfile, file, outsize); 1241 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1242 maybe_warnx("%s: unknown suffix -- ignored", file); 1243 goto lose; 1244 } 1245 1246 rbytes = read(fd, header1, sizeof header1); 1247 if (rbytes != sizeof header1) { 1248 /* we don't want to fail here. */ 1249 #ifndef SMALL 1250 if (fflag) 1251 goto lose; 1252 #endif 1253 if (rbytes == -1) 1254 maybe_warn("can't read %s", file); 1255 else 1256 maybe_warnx("%s: unexpected end of file", file); 1257 goto lose; 1258 } 1259 1260 method = file_gettype(header1); 1261 1262 #ifndef SMALL 1263 if (fflag == 0 && method == FT_UNKNOWN) { 1264 maybe_warnx("%s: not in gzip format", file); 1265 goto lose; 1266 } 1267 1268 #endif 1269 1270 #ifndef SMALL 1271 if (method == FT_GZIP && Nflag) { 1272 unsigned char ts[4]; /* timestamp */ 1273 1274 if (pread(fd, ts, sizeof ts, GZIP_TIMESTAMP) != sizeof ts) { 1275 if (!fflag) 1276 maybe_warn("can't read %s", file); 1277 goto lose; 1278 } 1279 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0]; 1280 1281 if (header1[3] & ORIG_NAME) { 1282 rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME); 1283 if (rbytes < 0) { 1284 maybe_warn("can't read %s", file); 1285 goto lose; 1286 } 1287 if (name[0] != 0) { 1288 /* preserve original directory name */ 1289 char *dp = strrchr(file, '/'); 1290 if (dp == NULL) 1291 dp = file; 1292 else 1293 dp++; 1294 snprintf(outfile, outsize, "%.*s%.*s", 1295 (int) (dp - file), 1296 file, (int) rbytes, name); 1297 } 1298 } 1299 } 1300 #endif 1301 lseek(fd, 0, SEEK_SET); 1302 1303 if (cflag == 0 || lflag) { 1304 if (fstat(fd, &isb) != 0) 1305 goto lose; 1306 #ifndef SMALL 1307 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1308 maybe_warnx("%s has %d other links -- skipping", 1309 file, isb.st_nlink - 1); 1310 goto lose; 1311 } 1312 if (nflag == 0 && timestamp) 1313 isb.st_mtime = timestamp; 1314 if (check_outfile(outfile, &osb) == 0) 1315 goto lose; 1316 #endif 1317 } 1318 1319 if (cflag == 0 && lflag == 0) { 1320 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1321 if (zfd == STDOUT_FILENO) { 1322 /* We won't close STDOUT_FILENO later... */ 1323 zfd = dup(zfd); 1324 close(STDOUT_FILENO); 1325 } 1326 if (zfd == -1) { 1327 maybe_warn("can't open %s", outfile); 1328 goto lose; 1329 } 1330 } else 1331 zfd = STDOUT_FILENO; 1332 1333 #ifndef NO_BZIP2_SUPPORT 1334 if (method == FT_BZIP2) { 1335 1336 /* XXX */ 1337 if (lflag) { 1338 maybe_warnx("no -l with bzip2 files"); 1339 goto lose; 1340 } 1341 1342 size = unbzip2(fd, zfd, NULL, 0, NULL); 1343 } else 1344 #endif 1345 1346 #ifndef NO_COMPRESS_SUPPORT 1347 if (method == FT_Z) { 1348 FILE *in, *out; 1349 1350 /* XXX */ 1351 if (lflag) { 1352 maybe_warnx("no -l with Lempel-Ziv files"); 1353 goto lose; 1354 } 1355 1356 if ((in = zdopen(fd)) == NULL) { 1357 maybe_warn("zdopen for read: %s", file); 1358 goto lose; 1359 } 1360 1361 out = fdopen(dup(zfd), "w"); 1362 if (out == NULL) { 1363 maybe_warn("fdopen for write: %s", outfile); 1364 fclose(in); 1365 goto lose; 1366 } 1367 1368 size = zuncompress(in, out, NULL, 0, NULL); 1369 /* need to fclose() if ferror() is true... */ 1370 if (ferror(in) | fclose(in)) { 1371 maybe_warn("failed infile fclose"); 1372 unlink(outfile); 1373 (void)fclose(out); 1374 } 1375 if (fclose(out) != 0) { 1376 maybe_warn("failed outfile fclose"); 1377 unlink(outfile); 1378 goto lose; 1379 } 1380 } else 1381 #endif 1382 1383 #ifndef SMALL 1384 if (method == FT_UNKNOWN) { 1385 if (lflag) { 1386 maybe_warnx("no -l for unknown filetypes"); 1387 goto lose; 1388 } 1389 size = cat_fd(NULL, 0, NULL, fd); 1390 } else 1391 #endif 1392 { 1393 if (lflag) { 1394 print_list(fd, isb.st_size, outfile, isb.st_mtime); 1395 close(fd); 1396 return -1; /* XXX */ 1397 } 1398 1399 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1400 } 1401 1402 if (close(fd) != 0) 1403 maybe_warn("couldn't close input"); 1404 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1405 maybe_warn("couldn't close output"); 1406 1407 if (size == -1) { 1408 if (cflag == 0) 1409 unlink(outfile); 1410 maybe_warnx("%s: uncompress failed", file); 1411 return -1; 1412 } 1413 1414 /* if testing, or we uncompressed to stdout, this is all we need */ 1415 #ifndef SMALL 1416 if (tflag) 1417 return size; 1418 #endif 1419 /* if we are uncompressing to stdin, don't remove the file. */ 1420 if (cflag) 1421 return size; 1422 1423 /* 1424 * if we create a file... 1425 */ 1426 /* 1427 * if we can't stat the file don't remove the file. 1428 */ 1429 if (stat(outfile, &osb) < 0) { 1430 maybe_warn("couldn't stat (leaving original): %s", 1431 outfile); 1432 return -1; 1433 } 1434 if (osb.st_size != size) { 1435 maybe_warn("stat gave different size: %" PRIdOFF 1436 " != %" PRIdOFF " (leaving original)", 1437 size, osb.st_size); 1438 unlink(outfile); 1439 return -1; 1440 } 1441 unlink_input(file, &isb); 1442 #ifndef SMALL 1443 copymodes(outfile, &isb); 1444 #endif 1445 return size; 1446 1447 lose: 1448 if (fd != -1) 1449 close(fd); 1450 if (zfd != -1 && zfd != STDOUT_FILENO) 1451 close(fd); 1452 return -1; 1453 } 1454 1455 #ifndef SMALL 1456 static off_t 1457 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd) 1458 { 1459 char buf[BUFLEN]; 1460 size_t rv; 1461 off_t in_tot; 1462 1463 in_tot = count; 1464 if (write(STDOUT_FILENO, prepend, count) != count) { 1465 maybe_warn("write to stdout"); 1466 return -1; 1467 } 1468 for (;;) { 1469 rv = read(fd, buf, sizeof buf); 1470 if (rv == 0) 1471 break; 1472 if (rv < 0) { 1473 maybe_warn("read from fd %d", fd); 1474 break; 1475 } 1476 1477 if (write(STDOUT_FILENO, buf, rv) != rv) { 1478 maybe_warn("write to stdout"); 1479 break; 1480 } 1481 in_tot += rv; 1482 } 1483 1484 if (gsizep) 1485 *gsizep = in_tot; 1486 return (in_tot); 1487 } 1488 #endif 1489 1490 static void 1491 handle_stdin(void) 1492 { 1493 unsigned char header1[4]; 1494 off_t usize, gsize; 1495 enum filetype method; 1496 #ifndef NO_COMPRESS_SUPPORT 1497 FILE *in; 1498 #endif 1499 1500 #ifndef SMALL 1501 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1502 maybe_warnx("standard input is a terminal -- ignoring"); 1503 return; 1504 } 1505 #endif 1506 1507 if (lflag) { 1508 struct stat isb; 1509 1510 /* XXX could read the whole file, etc. */ 1511 if (fstat(STDIN_FILENO, &isb) < 0) { 1512 maybe_warn("fstat"); 1513 return; 1514 } 1515 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime); 1516 return; 1517 } 1518 1519 if (read(STDIN_FILENO, header1, sizeof header1) != sizeof header1) { 1520 maybe_warn("can't read stdin"); 1521 return; 1522 } 1523 1524 method = file_gettype(header1); 1525 switch (method) { 1526 default: 1527 #ifndef SMALL 1528 if (fflag == 0) { 1529 maybe_warnx("unknown compression format"); 1530 return; 1531 } 1532 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO); 1533 break; 1534 #endif 1535 case FT_GZIP: 1536 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1537 header1, sizeof header1, &gsize, "(stdin)"); 1538 break; 1539 #ifndef NO_BZIP2_SUPPORT 1540 case FT_BZIP2: 1541 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1542 header1, sizeof header1, &gsize); 1543 break; 1544 #endif 1545 #ifndef NO_COMPRESS_SUPPORT 1546 case FT_Z: 1547 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1548 maybe_warnx("zopen of stdin"); 1549 return; 1550 } 1551 1552 usize = zuncompress(in, stdout, header1, sizeof header1, &gsize); 1553 fclose(in); 1554 break; 1555 #endif 1556 } 1557 1558 #ifndef SMALL 1559 if (vflag && !tflag && usize != -1 && gsize != -1) 1560 print_verbage(NULL, NULL, usize, gsize); 1561 #endif 1562 1563 } 1564 1565 static void 1566 handle_stdout(void) 1567 { 1568 off_t gsize, usize; 1569 1570 #ifndef SMALL 1571 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1572 maybe_warnx("standard output is a terminal -- ignoring"); 1573 return; 1574 } 1575 #endif 1576 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", 0); 1577 1578 #ifndef SMALL 1579 if (vflag && !tflag && usize != -1 && gsize != -1) 1580 print_verbage(NULL, NULL, usize, gsize); 1581 #endif 1582 } 1583 1584 /* do what is asked for, for the path name */ 1585 static void 1586 handle_pathname(char *path) 1587 { 1588 char *opath = path, *s = NULL; 1589 ssize_t len; 1590 int slen; 1591 struct stat sb; 1592 1593 /* check for stdout/stdin */ 1594 if (path[0] == '-' && path[1] == '\0') { 1595 if (dflag) 1596 handle_stdin(); 1597 else 1598 handle_stdout(); 1599 return; 1600 } 1601 1602 retry: 1603 if (stat(path, &sb) < 0) { 1604 /* lets try <path>.gz if we're decompressing */ 1605 if (dflag && s == NULL && errno == ENOENT) { 1606 len = strlen(path); 1607 slen = suffixes[0].ziplen; 1608 s = malloc(len + slen + 1); 1609 if (s == NULL) 1610 maybe_err("malloc"); 1611 memcpy(s, path, len); 1612 memcpy(s + len, suffixes[0].zipped, slen + 1); 1613 path = s; 1614 goto retry; 1615 } 1616 maybe_warn("can't stat: %s", opath); 1617 goto out; 1618 } 1619 1620 if (S_ISDIR(sb.st_mode)) { 1621 #ifndef SMALL 1622 if (rflag) 1623 handle_dir(path, &sb); 1624 else 1625 #endif 1626 maybe_warnx("%s is a directory", path); 1627 goto out; 1628 } 1629 1630 if (S_ISREG(sb.st_mode)) 1631 handle_file(path, &sb); 1632 else 1633 maybe_warnx("%s is not a regular file", path); 1634 1635 out: 1636 if (s) 1637 free(s); 1638 } 1639 1640 /* compress/decompress a file */ 1641 static void 1642 handle_file(char *file, struct stat *sbp) 1643 { 1644 off_t usize, gsize; 1645 char outfile[PATH_MAX]; 1646 1647 infile = file; 1648 if (dflag) { 1649 usize = file_uncompress(file, outfile, sizeof(outfile)); 1650 if (usize == -1) 1651 return; 1652 gsize = sbp->st_size; 1653 } else { 1654 gsize = file_compress(file, outfile, sizeof(outfile)); 1655 if (gsize == -1) 1656 return; 1657 usize = sbp->st_size; 1658 } 1659 1660 1661 #ifndef SMALL 1662 if (vflag && !tflag) 1663 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 1664 #endif 1665 } 1666 1667 #ifndef SMALL 1668 /* this is used with -r to recursively descend directories */ 1669 static void 1670 handle_dir(char *dir, struct stat *sbp) 1671 { 1672 char *path_argv[2]; 1673 FTS *fts; 1674 FTSENT *entry; 1675 1676 path_argv[0] = dir; 1677 path_argv[1] = 0; 1678 fts = fts_open(path_argv, FTS_PHYSICAL, NULL); 1679 if (fts == NULL) { 1680 warn("couldn't fts_open %s", dir); 1681 return; 1682 } 1683 1684 while ((entry = fts_read(fts))) { 1685 switch(entry->fts_info) { 1686 case FTS_D: 1687 case FTS_DP: 1688 continue; 1689 1690 case FTS_DNR: 1691 case FTS_ERR: 1692 case FTS_NS: 1693 maybe_warn("%s", entry->fts_path); 1694 continue; 1695 case FTS_F: 1696 handle_file(entry->fts_name, entry->fts_statp); 1697 } 1698 } 1699 (void)fts_close(fts); 1700 } 1701 #endif 1702 1703 /* print a ratio - size reduction as a fraction of uncompressed size */ 1704 static void 1705 print_ratio(off_t in, off_t out, FILE *where) 1706 { 1707 int percent10; /* 10 * percent */ 1708 off_t diff; 1709 char buff[8]; 1710 int len; 1711 1712 diff = in - out/2; 1713 if (diff <= 0) 1714 /* 1715 * Output is more than double size of input! print -99.9% 1716 * Quite possibly we've failed to get the original size. 1717 */ 1718 percent10 = -999; 1719 else { 1720 /* 1721 * We only need 12 bits of result from the final division, 1722 * so reduce the values until a 32bit division will suffice. 1723 */ 1724 while (in > 0x100000) { 1725 diff >>= 1; 1726 in >>= 1; 1727 } 1728 if (in != 0) 1729 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 1730 else 1731 percent10 = 0; 1732 } 1733 1734 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 1735 /* Move the '.' to before the last digit */ 1736 buff[len - 1] = buff[len - 2]; 1737 buff[len - 2] = '.'; 1738 fprintf(where, "%5s%%", buff); 1739 } 1740 1741 #ifndef SMALL 1742 /* print compression statistics, and the new name (if there is one!) */ 1743 static void 1744 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 1745 { 1746 if (file) 1747 fprintf(stderr, "%s:%s ", file, 1748 strlen(file) < 7 ? "\t\t" : "\t"); 1749 print_ratio(usize, gsize, stderr); 1750 if (nfile) 1751 fprintf(stderr, " -- replaced with %s", nfile); 1752 fprintf(stderr, "\n"); 1753 fflush(stderr); 1754 } 1755 1756 /* print test results */ 1757 static void 1758 print_test(const char *file, int ok) 1759 { 1760 1761 if (exit_value == 0 && ok == 0) 1762 exit_value = 1; 1763 fprintf(stderr, "%s:%s %s\n", file, 1764 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 1765 fflush(stderr); 1766 } 1767 #endif 1768 1769 /* print a file's info ala --list */ 1770 /* eg: 1771 compressed uncompressed ratio uncompressed_name 1772 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 1773 */ 1774 static void 1775 print_list(int fd, off_t out, const char *outfile, time_t ts) 1776 { 1777 static int first = 1; 1778 #ifndef SMALL 1779 static off_t in_tot, out_tot; 1780 uint32_t crc; 1781 #endif 1782 off_t in; 1783 int rv; 1784 1785 if (first) { 1786 #ifndef SMALL 1787 if (vflag) 1788 printf("method crc date time "); 1789 #endif 1790 if (qflag == 0) 1791 printf(" compressed uncompressed " 1792 "ratio uncompressed_name\n"); 1793 } 1794 first = 0; 1795 1796 /* print totals? */ 1797 #ifndef SMALL 1798 if (fd == -1) { 1799 in = in_tot; 1800 out = out_tot; 1801 } else 1802 #endif 1803 { 1804 /* read the last 4 bytes - this is the uncompressed size */ 1805 rv = lseek(fd, (off_t)(-8), SEEK_END); 1806 if (rv != -1) { 1807 unsigned char buf[8]; 1808 uint32_t usize; 1809 1810 if (read(fd, (char *)buf, sizeof(buf)) != sizeof(buf)) 1811 maybe_warn("read of uncompressed size"); 1812 usize = buf[4] | buf[5] << 8 | buf[6] << 16 | buf[7] << 24; 1813 in = (off_t)usize; 1814 #ifndef SMALL 1815 crc = buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24; 1816 #endif 1817 } 1818 } 1819 1820 #ifndef SMALL 1821 if (vflag && fd == -1) 1822 printf(" "); 1823 else if (vflag) { 1824 char *date = ctime(&ts); 1825 1826 /* skip the day, 1/100th second, and year */ 1827 date += 4; 1828 date[12] = 0; 1829 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 1830 } 1831 in_tot += in; 1832 out_tot += out; 1833 #endif 1834 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 1835 print_ratio(in, out, stdout); 1836 printf(" %s\n", outfile); 1837 } 1838 1839 /* display the usage of NetBSD gzip */ 1840 static void 1841 usage(void) 1842 { 1843 1844 fprintf(stderr, "%s\n", gzip_version); 1845 fprintf(stderr, 1846 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n" 1847 #ifndef SMALL 1848 " -c --stdout write to stdout, keep original files\n" 1849 " --to-stdout\n" 1850 " -d --decompress uncompress files\n" 1851 " --uncompress\n" 1852 " -f --force force overwriting & compress links\n" 1853 " -h --help display this help\n" 1854 " -n --no-name don't save original file name or time stamp\n" 1855 " -N --name save or restore original file name and time stamp\n" 1856 " -q --quiet output no warnings\n" 1857 " -r --recursive recursively compress files in directories\n" 1858 " -S .suf use suffix .suf instead of .gz\n" 1859 " --suffix .suf\n" 1860 " -t --test test compressed file\n" 1861 " -v --verbose print extra statistics\n" 1862 " -V --version display program version\n" 1863 " -1 --fast fastest (worst) compression\n" 1864 " -2 .. -8 set compression level\n" 1865 " -9 --best best (slowest) compression\n", 1866 #else 1867 , 1868 #endif 1869 getprogname()); 1870 exit(0); 1871 } 1872 1873 /* display the version of NetBSD gzip */ 1874 static void 1875 display_version(void) 1876 { 1877 1878 fprintf(stderr, "%s\n", gzip_version); 1879 exit(0); 1880 } 1881 1882 #ifndef NO_BZIP2_SUPPORT 1883 #include "unbzip2.c" 1884 #endif 1885 #ifndef NO_COMPRESS_SUPPORT 1886 #include "zuncompress.c" 1887 #endif 1888