1 /* $NetBSD: gzip.c,v 1.69 2004/12/08 06:38:40 jmc 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 1.69 2004/12/08 06:38:40 jmc 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; *s; s++) { 438 if (*s == ' ' || *s == '\t') 439 continue; 440 nenvarg++; 441 for (; *s; s++) 442 if (*s == ' ' || *s == '\t') 443 break; 444 if (*s == 0x0) 445 break; 446 } 447 /* punt early */ 448 if (nenvarg == 0) 449 return; 450 451 *argc += nenvarg; 452 ac = *argv; 453 454 nargv = (char **)malloc((*argc + 1) * sizeof(char *)); 455 if (nargv == NULL) 456 maybe_err("malloc"); 457 458 /* stash this away */ 459 *argv = nargv; 460 461 /* copy the program name first */ 462 i = 0; 463 nargv[i++] = *(ac++); 464 465 /* take a copy of $GZIP and add it to the array */ 466 s = strdup(gzip); 467 if (s == NULL) 468 maybe_err("strdup"); 469 for (; *s; s++) { 470 if (*s == ' ' || *s == '\t') 471 continue; 472 nargv[i++] = s; 473 for (; *s; s++) 474 if (*s == ' ' || *s == '\t') { 475 *s = 0; 476 break; 477 } 478 } 479 480 /* copy the original arguments and a NULL */ 481 while (*ac) 482 nargv[i++] = *(ac++); 483 nargv[i] = NULL; 484 } 485 #endif 486 487 /* compress input to output. Return bytes read, -1 on error */ 488 static off_t 489 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime) 490 { 491 z_stream z; 492 char *outbufp, *inbufp; 493 off_t in_tot = 0, out_tot = 0; 494 ssize_t in_size; 495 int i, error; 496 uLong crc; 497 #ifdef SMALL 498 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0, 499 0, 0, 0, 0, 500 0, OS_CODE }; 501 #endif 502 503 outbufp = malloc(BUFLEN); 504 inbufp = malloc(BUFLEN); 505 if (outbufp == NULL || inbufp == NULL) { 506 maybe_err("malloc failed"); 507 goto out; 508 } 509 510 memset(&z, 0, sizeof z); 511 z.zalloc = Z_NULL; 512 z.zfree = Z_NULL; 513 z.opaque = 0; 514 515 #ifdef SMALL 516 memcpy(outbufp, header, sizeof header); 517 i = sizeof header; 518 #else 519 if (nflag != 0) { 520 mtime = 0; 521 origname = ""; 522 } 523 524 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s", 525 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 526 *origname ? ORIG_NAME : 0, 527 mtime & 0xff, 528 (mtime >> 8) & 0xff, 529 (mtime >> 16) & 0xff, 530 (mtime >> 24) & 0xff, 531 numflag == 1 ? 4 : numflag == 9 ? 2 : 0, 532 OS_CODE, origname); 533 if (i >= BUFLEN) 534 /* this need PATH_MAX > BUFLEN ... */ 535 maybe_err("snprintf"); 536 if (*origname) 537 i++; 538 #endif 539 540 z.next_out = outbufp + i; 541 z.avail_out = BUFLEN - i; 542 543 error = deflateInit2(&z, numflag, Z_DEFLATED, 544 -MAX_WBITS, 8, Z_DEFAULT_STRATEGY); 545 if (error != Z_OK) { 546 maybe_warnx("deflateInit2 failed"); 547 in_tot = -1; 548 goto out; 549 } 550 551 crc = crc32(0L, Z_NULL, 0); 552 for (;;) { 553 if (z.avail_out == 0) { 554 if (write(out, outbufp, BUFLEN) != BUFLEN) { 555 maybe_warn("write"); 556 in_tot = -1; 557 goto out; 558 } 559 560 out_tot += BUFLEN; 561 z.next_out = outbufp; 562 z.avail_out = BUFLEN; 563 } 564 565 if (z.avail_in == 0) { 566 in_size = read(in, inbufp, BUFLEN); 567 if (in_size < 0) { 568 maybe_warn("read"); 569 in_tot = -1; 570 goto out; 571 } 572 if (in_size == 0) 573 break; 574 575 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size); 576 in_tot += in_size; 577 z.next_in = inbufp; 578 z.avail_in = in_size; 579 } 580 581 error = deflate(&z, Z_NO_FLUSH); 582 if (error != Z_OK && error != Z_STREAM_END) { 583 maybe_warnx("deflate failed"); 584 in_tot = -1; 585 goto out; 586 } 587 } 588 589 /* clean up */ 590 for (;;) { 591 size_t len; 592 593 error = deflate(&z, Z_FINISH); 594 if (error != Z_OK && error != Z_STREAM_END) { 595 maybe_warnx("deflate failed"); 596 in_tot = -1; 597 goto out; 598 } 599 600 len = (char *)z.next_out - outbufp; 601 602 if (write(out, outbufp, len) != len) { 603 maybe_warn("write"); 604 out_tot = -1; 605 goto out; 606 } 607 out_tot += len; 608 z.next_out = outbufp; 609 z.avail_out = BUFLEN; 610 611 if (error == Z_STREAM_END) 612 break; 613 } 614 615 if (deflateEnd(&z) != Z_OK) { 616 maybe_warnx("deflateEnd failed"); 617 in_tot = -1; 618 goto out; 619 } 620 621 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c", 622 (int)crc & 0xff, 623 (int)(crc >> 8) & 0xff, 624 (int)(crc >> 16) & 0xff, 625 (int)(crc >> 24) & 0xff, 626 (int)in_tot & 0xff, 627 (int)(in_tot >> 8) & 0xff, 628 (int)(in_tot >> 16) & 0xff, 629 (int)(in_tot >> 24) & 0xff); 630 if (i != 8) 631 maybe_err("snprintf"); 632 if (write(out, outbufp, i) != i) { 633 maybe_warn("write"); 634 in_tot = -1; 635 } else 636 out_tot += i; 637 638 out: 639 if (inbufp != NULL) 640 free(inbufp); 641 if (outbufp != NULL) 642 free(outbufp); 643 if (gsizep) 644 *gsizep = out_tot; 645 return in_tot; 646 } 647 648 /* 649 * uncompress input to output then close the input. return the 650 * uncompressed size written, and put the compressed sized read 651 * into `*gsizep'. 652 */ 653 static off_t 654 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep, 655 const char *filename) 656 { 657 z_stream z; 658 char *outbufp, *inbufp; 659 off_t out_tot, in_tot; 660 uint32_t out_sub_tot; 661 enum { 662 GZSTATE_MAGIC0, 663 GZSTATE_MAGIC1, 664 GZSTATE_METHOD, 665 GZSTATE_FLAGS, 666 GZSTATE_SKIPPING, 667 GZSTATE_EXTRA, 668 GZSTATE_EXTRA2, 669 GZSTATE_EXTRA3, 670 GZSTATE_ORIGNAME, 671 GZSTATE_COMMENT, 672 GZSTATE_HEAD_CRC1, 673 GZSTATE_HEAD_CRC2, 674 GZSTATE_INIT, 675 GZSTATE_READ, 676 GZSTATE_CRC, 677 GZSTATE_LEN, 678 } state = GZSTATE_MAGIC0; 679 int flags = 0, skip_count = 0; 680 int error, done_reading = 0; 681 uLong crc; 682 ssize_t wr; 683 684 #define ADVANCE() { z.next_in++; z.avail_in--; } 685 686 if ((outbufp = malloc(BUFLEN)) == NULL) { 687 maybe_err("malloc failed"); 688 goto out2; 689 } 690 if ((inbufp = malloc(BUFLEN)) == NULL) { 691 maybe_err("malloc failed"); 692 goto out1; 693 } 694 695 memset(&z, 0, sizeof z); 696 z.avail_in = prelen; 697 z.next_in = pre; 698 z.avail_out = BUFLEN; 699 z.next_out = outbufp; 700 z.zalloc = NULL; 701 z.zfree = NULL; 702 z.opaque = 0; 703 704 in_tot = prelen; 705 out_tot = 0; 706 707 for (;;) { 708 if (z.avail_in == 0 && done_reading == 0) { 709 size_t in_size = read(in, inbufp, BUFLEN); 710 711 if (in_size == -1) { 712 #ifndef SMALL 713 if (tflag && vflag) 714 print_test(filename, 0); 715 #endif 716 maybe_warn("failed to read stdin"); 717 out_tot = -1; 718 goto stop; 719 } else if (in_size == 0) 720 done_reading = 1; 721 722 z.avail_in = in_size; 723 z.next_in = inbufp; 724 725 in_tot += in_size; 726 } 727 if (z.avail_in == 0) { 728 if (done_reading && state != GZSTATE_MAGIC0) 729 maybe_warnx("%s: unexpected end of file", 730 filename); 731 goto stop; 732 } 733 switch (state) { 734 case GZSTATE_MAGIC0: 735 if (*z.next_in != GZIP_MAGIC0) { 736 maybe_warnx("input not gziped (MAGIC0)"); 737 out_tot = -1; 738 goto stop; 739 } 740 ADVANCE(); 741 state++; 742 out_sub_tot = 0; 743 crc = crc32(0L, Z_NULL, 0); 744 break; 745 746 case GZSTATE_MAGIC1: 747 if (*z.next_in != GZIP_MAGIC1 && 748 *z.next_in != GZIP_OMAGIC1) { 749 maybe_warnx("input not gziped (MAGIC1)"); 750 out_tot = -1; 751 goto stop; 752 } 753 ADVANCE(); 754 state++; 755 break; 756 757 case GZSTATE_METHOD: 758 if (*z.next_in != Z_DEFLATED) { 759 maybe_warnx("unknown compression method"); 760 out_tot = -1; 761 goto stop; 762 } 763 ADVANCE(); 764 state++; 765 break; 766 767 case GZSTATE_FLAGS: 768 flags = *z.next_in; 769 ADVANCE(); 770 skip_count = 6; 771 state++; 772 break; 773 774 case GZSTATE_SKIPPING: 775 if (skip_count > 0) { 776 skip_count--; 777 ADVANCE(); 778 } else 779 state++; 780 break; 781 782 case GZSTATE_EXTRA: 783 if ((flags & EXTRA_FIELD) == 0) { 784 state = GZSTATE_ORIGNAME; 785 break; 786 } 787 skip_count = *z.next_in; 788 ADVANCE(); 789 state++; 790 break; 791 792 case GZSTATE_EXTRA2: 793 skip_count |= ((*z.next_in) << 8); 794 ADVANCE(); 795 state++; 796 break; 797 798 case GZSTATE_EXTRA3: 799 if (skip_count > 0) { 800 skip_count--; 801 ADVANCE(); 802 } else 803 state++; 804 break; 805 806 case GZSTATE_ORIGNAME: 807 if ((flags & ORIG_NAME) == 0) { 808 state++; 809 break; 810 } 811 if (*z.next_in == 0) 812 state++; 813 ADVANCE(); 814 break; 815 816 case GZSTATE_COMMENT: 817 if ((flags & COMMENT) == 0) { 818 state++; 819 break; 820 } 821 if (*z.next_in == 0) 822 state++; 823 ADVANCE(); 824 break; 825 826 case GZSTATE_HEAD_CRC1: 827 if (flags & HEAD_CRC) 828 skip_count = 2; 829 else 830 skip_count = 0; 831 state++; 832 break; 833 834 case GZSTATE_HEAD_CRC2: 835 if (skip_count > 0) { 836 skip_count--; 837 ADVANCE(); 838 } else 839 state++; 840 break; 841 842 case GZSTATE_INIT: 843 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) { 844 maybe_warnx("failed to inflateInit"); 845 out_tot = -1; 846 goto stop; 847 } 848 state++; 849 break; 850 851 case GZSTATE_READ: 852 error = inflate(&z, Z_FINISH); 853 /* Z_BUF_ERROR goes with Z_FINISH... */ 854 if (error != Z_STREAM_END && error != Z_BUF_ERROR) 855 /* Just need more input */ 856 break; 857 wr = BUFLEN - z.avail_out; 858 859 if (wr != 0) { 860 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 861 if ( 862 #ifndef SMALL 863 /* don't write anything with -t */ 864 tflag == 0 && 865 #endif 866 write(out, outbufp, wr) != wr) { 867 maybe_warn("error writing to output"); 868 out_tot = -1; 869 goto stop; 870 } 871 872 out_tot += wr; 873 out_sub_tot += wr; 874 } 875 876 if (error == Z_STREAM_END) { 877 inflateEnd(&z); 878 state++; 879 } 880 881 z.next_out = outbufp; 882 z.avail_out = BUFLEN; 883 884 break; 885 case GZSTATE_CRC: 886 { 887 static int empty_buffer = 0; 888 uLong origcrc; 889 890 if (z.avail_in < 4) { 891 if (!done_reading && empty_buffer++ < 4) 892 continue; 893 maybe_warnx("truncated input"); 894 out_tot = -1; 895 goto stop; 896 } 897 empty_buffer = 0; 898 origcrc = ((unsigned)z.next_in[0] & 0xff) | 899 ((unsigned)z.next_in[1] & 0xff) << 8 | 900 ((unsigned)z.next_in[2] & 0xff) << 16 | 901 ((unsigned)z.next_in[3] & 0xff) << 24; 902 if (origcrc != crc) { 903 maybe_warnx("invalid compressed" 904 " data--crc error"); 905 out_tot = -1; 906 goto stop; 907 } 908 } 909 910 z.avail_in -= 4; 911 z.next_in += 4; 912 913 if (!z.avail_in) 914 goto stop; 915 state++; 916 break; 917 case GZSTATE_LEN: 918 { 919 static int empty_buffer = 0; 920 uLong origlen; 921 922 if (z.avail_in < 4) { 923 if (!done_reading && empty_buffer++ < 4) 924 continue; 925 maybe_warnx("truncated input"); 926 out_tot = -1; 927 goto stop; 928 } 929 empty_buffer = 0; 930 origlen = ((unsigned)z.next_in[0] & 0xff) | 931 ((unsigned)z.next_in[1] & 0xff) << 8 | 932 ((unsigned)z.next_in[2] & 0xff) << 16 | 933 ((unsigned)z.next_in[3] & 0xff) << 24; 934 935 if (origlen != out_sub_tot) { 936 maybe_warnx("invalid compressed" 937 " data--length error"); 938 out_tot = -1; 939 goto stop; 940 } 941 } 942 943 z.avail_in -= 4; 944 z.next_in += 4; 945 946 if (error < 0) { 947 maybe_warnx("decompression error"); 948 out_tot = -1; 949 goto stop; 950 } 951 state = GZSTATE_MAGIC0; 952 break; 953 } 954 continue; 955 stop: 956 break; 957 } 958 if (state > GZSTATE_INIT) 959 inflateEnd(&z); 960 961 #ifndef SMALL 962 if (tflag && vflag) 963 print_test(filename, out_tot != -1); 964 #endif 965 966 free(inbufp); 967 out1: 968 free(outbufp); 969 out2: 970 if (gsizep) 971 *gsizep = in_tot; 972 return (out_tot); 973 } 974 975 #ifndef SMALL 976 /* 977 * set the owner, mode, flags & utimes for a file 978 */ 979 static void 980 copymodes(const char *file, struct stat *sbp) 981 { 982 struct timeval times[2]; 983 984 /* 985 * If we have no info on the input, give this file some 986 * default values and return.. 987 */ 988 if (sbp == NULL) { 989 mode_t mask = umask(022); 990 991 (void)chmod(file, DEFFILEMODE & ~mask); 992 (void)umask(mask); 993 return; 994 } 995 996 /* if the chown fails, remove set-id bits as-per compress(1) */ 997 if (chown(file, sbp->st_uid, sbp->st_gid) < 0) { 998 if (errno != EPERM) 999 maybe_warn("couldn't chown: %s", file); 1000 sbp->st_mode &= ~(S_ISUID|S_ISGID); 1001 } 1002 1003 /* we only allow set-id and the 9 normal permission bits */ 1004 sbp->st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1005 if (chmod(file, sbp->st_mode) < 0) 1006 maybe_warn("couldn't chmod: %s", file); 1007 1008 /* only try flags if they exist already */ 1009 if (sbp->st_flags != 0 && chflags(file, sbp->st_flags) < 0) 1010 maybe_warn("couldn't chflags: %s", file); 1011 1012 TIMESPEC_TO_TIMEVAL(×[0], &sbp->st_atimespec); 1013 TIMESPEC_TO_TIMEVAL(×[1], &sbp->st_mtimespec); 1014 if (utimes(file, times) < 0) 1015 maybe_warn("couldn't utimes: %s", file); 1016 } 1017 #endif 1018 1019 /* what sort of file is this? */ 1020 static enum filetype 1021 file_gettype(u_char *buf) 1022 { 1023 1024 if (buf[0] == GZIP_MAGIC0 && 1025 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1026 return FT_GZIP; 1027 else 1028 #ifndef NO_BZIP2_SUPPORT 1029 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1030 buf[3] >= '0' && buf[3] <= '9') 1031 return FT_BZIP2; 1032 else 1033 #endif 1034 #ifndef NO_COMPRESS_SUPPORT 1035 if (memcmp(buf, Z_MAGIC, 2) == 0) 1036 return FT_Z; 1037 else 1038 #endif 1039 return FT_UNKNOWN; 1040 } 1041 1042 #ifndef SMALL 1043 /* check the outfile is OK. */ 1044 static int 1045 check_outfile(const char *outfile, struct stat *sb) 1046 { 1047 int ok = 1; 1048 1049 if (lflag == 0 && stat(outfile, sb) == 0) { 1050 if (fflag) 1051 unlink(outfile); 1052 else if (isatty(STDIN_FILENO)) { 1053 char ans[10] = { 'n', '\0' }; /* default */ 1054 1055 fprintf(stderr, "%s already exists -- do you wish to " 1056 "overwrite (y or n)? " , outfile); 1057 (void)fgets(ans, sizeof(ans) - 1, stdin); 1058 if (ans[0] != 'y' && ans[0] != 'Y') { 1059 fprintf(stderr, "\tnot overwritting\n"); 1060 ok = 0; 1061 } else 1062 unlink(outfile); 1063 } else { 1064 maybe_warnx("%s already exists -- skipping", outfile); 1065 ok = 0; 1066 } 1067 } 1068 return ok; 1069 } 1070 1071 static void 1072 unlink_input(const char *file, struct stat *sb) 1073 { 1074 struct stat nsb; 1075 1076 if (stat(file, &nsb) != 0) 1077 /* Must be gone alrady */ 1078 return; 1079 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1080 /* Definitely a different file */ 1081 return; 1082 unlink(file); 1083 } 1084 #endif 1085 1086 static const suffixes_t * 1087 check_suffix(char *file, int xlate) 1088 { 1089 const suffixes_t *s; 1090 int len = strlen(file); 1091 char *sp; 1092 1093 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1094 /* if it doesn't fit in "a.suf", don't bother */ 1095 if (s->ziplen >= len) 1096 continue; 1097 sp = file + len - s->ziplen; 1098 if (strcmp(s->zipped, sp) != 0) 1099 continue; 1100 if (xlate) 1101 strcpy(sp, s->normal); 1102 return s; 1103 } 1104 return NULL; 1105 } 1106 1107 /* 1108 * compress the given file: create a corresponding .gz file and remove the 1109 * original. 1110 */ 1111 static off_t 1112 file_compress(char *file, char *outfile, size_t outsize) 1113 { 1114 int in; 1115 int out; 1116 off_t size, insize; 1117 #ifndef SMALL 1118 struct stat isb, osb; 1119 const suffixes_t *suff; 1120 #endif 1121 1122 in = open(file, O_RDONLY); 1123 if (in == -1) { 1124 maybe_warn("can't open %s", file); 1125 return -1; 1126 } 1127 1128 if (cflag == 0) { 1129 #ifndef SMALL 1130 if (stat(file, &isb) == 0) { 1131 if (isb.st_nlink > 1 && fflag == 0) { 1132 maybe_warnx("%s has %d other link%s -- " 1133 "skipping", file, isb.st_nlink - 1, 1134 isb.st_nlink == 1 ? "" : "s"); 1135 close(in); 1136 return -1; 1137 } 1138 } 1139 1140 if (fflag == 0 && (suff = check_suffix(file, 0)) 1141 && suff->zipped[0] != 0) { 1142 maybe_warnx("%s already has %s suffix -- unchanged", 1143 file, suff->zipped); 1144 close(in); 1145 return -1; 1146 } 1147 #endif 1148 1149 /* Add (usually) .gz to filename */ 1150 if (snprintf(outfile, outsize, "%s%s", 1151 file, suffixes[0].zipped) >= outsize) 1152 memcpy(outfile - suffixes[0].ziplen - 1, 1153 suffixes[0].zipped, suffixes[0].ziplen + 1); 1154 1155 #ifndef SMALL 1156 if (check_outfile(outfile, &osb) == 0) { 1157 close(in); 1158 return -1; 1159 } 1160 #endif 1161 } 1162 1163 if (cflag == 0) { 1164 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600); 1165 if (out == -1) { 1166 maybe_warn("could not create output: %s", outfile); 1167 fclose(stdin); 1168 return -1; 1169 } 1170 } else 1171 out = STDOUT_FILENO; 1172 1173 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1174 1175 (void)close(in); 1176 1177 /* 1178 * If there was an error, insize will be -1. 1179 * If we compressed to stdout, just return the size. 1180 * Otherwise stat the file and check it is the correct size. 1181 * We only blow away the file if we can stat the output and it 1182 * has the expected size. 1183 */ 1184 if (cflag != 0) 1185 return insize == -1 ? -1 : size; 1186 1187 if (close(out) == -1) 1188 maybe_warn("couldn't close ouput"); 1189 1190 #ifndef SMALL 1191 if (stat(outfile, &osb) < 0) { 1192 maybe_warn("couldn't stat: %s", outfile); 1193 goto bad_outfile; 1194 } 1195 1196 if (osb.st_size != size) { 1197 maybe_warnx("output file: %s wrong size (%" PRIdOFF 1198 " != %" PRIdOFF "), deleting", 1199 outfile, osb.st_size, size); 1200 goto bad_outfile; 1201 } 1202 1203 copymodes(outfile, &isb); 1204 #endif 1205 1206 /* output is good, ok to delete input */ 1207 unlink_input(file, &isb); 1208 return size; 1209 1210 #ifndef SMALL 1211 bad_outfile: 1212 maybe_warnx("leaving original %s", file); 1213 unlink(outfile); 1214 return size; 1215 #endif 1216 } 1217 1218 /* uncompress the given file and remove the original */ 1219 static off_t 1220 file_uncompress(char *file, char *outfile, size_t outsize) 1221 { 1222 struct stat isb, osb; 1223 off_t size; 1224 ssize_t rbytes; 1225 unsigned char header1[4]; 1226 enum filetype method; 1227 int fd, zfd = -1; 1228 #ifndef SMALL 1229 time_t timestamp = 0; 1230 unsigned char name[PATH_MAX + 1]; 1231 #endif 1232 1233 /* gather the old name info */ 1234 1235 fd = open(file, O_RDONLY); 1236 if (fd < 0) { 1237 maybe_warn("can't open %s", file); 1238 goto lose; 1239 } 1240 1241 strlcpy(outfile, file, outsize); 1242 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1243 maybe_warnx("%s: unknown suffix -- ignored", file); 1244 goto lose; 1245 } 1246 1247 rbytes = read(fd, header1, sizeof header1); 1248 if (rbytes != sizeof header1) { 1249 /* we don't want to fail here. */ 1250 #ifndef SMALL 1251 if (fflag) 1252 goto lose; 1253 #endif 1254 if (rbytes == -1) 1255 maybe_warn("can't read %s", file); 1256 else 1257 maybe_warnx("%s: unexpected end of file", file); 1258 goto lose; 1259 } 1260 1261 method = file_gettype(header1); 1262 1263 #ifndef SMALL 1264 if (fflag == 0 && method == FT_UNKNOWN) { 1265 maybe_warnx("%s: not in gzip format", file); 1266 goto lose; 1267 } 1268 1269 #endif 1270 1271 #ifndef SMALL 1272 if (method == FT_GZIP && Nflag) { 1273 unsigned char ts[4]; /* timestamp */ 1274 1275 if (pread(fd, ts, sizeof ts, GZIP_TIMESTAMP) != sizeof ts) { 1276 if (!fflag) 1277 maybe_warn("can't read %s", file); 1278 goto lose; 1279 } 1280 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0]; 1281 1282 if (header1[3] & ORIG_NAME) { 1283 rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME); 1284 if (rbytes < 0) { 1285 maybe_warn("can't read %s", file); 1286 goto lose; 1287 } 1288 if (name[0] != 0) { 1289 /* preserve original directory name */ 1290 char *dp = strrchr(file, '/'); 1291 if (dp == NULL) 1292 dp = file; 1293 else 1294 dp++; 1295 snprintf(outfile, outsize, "%.*s%.*s", 1296 (int) (dp - file), 1297 file, (int) rbytes, name); 1298 } 1299 } 1300 } 1301 #endif 1302 lseek(fd, 0, SEEK_SET); 1303 1304 if (cflag == 0 || lflag) { 1305 if (fstat(fd, &isb) != 0) 1306 goto lose; 1307 #ifndef SMALL 1308 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1309 maybe_warnx("%s has %d other links -- skipping", 1310 file, isb.st_nlink - 1); 1311 goto lose; 1312 } 1313 if (nflag == 0 && timestamp) 1314 isb.st_mtime = timestamp; 1315 if (check_outfile(outfile, &osb) == 0) 1316 goto lose; 1317 #endif 1318 } 1319 1320 if (cflag == 0 && lflag == 0) { 1321 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1322 if (zfd == STDOUT_FILENO) { 1323 /* We won't close STDOUT_FILENO later... */ 1324 zfd = dup(zfd); 1325 close(STDOUT_FILENO); 1326 } 1327 if (zfd == -1) { 1328 maybe_warn("can't open %s", outfile); 1329 goto lose; 1330 } 1331 } else 1332 zfd = STDOUT_FILENO; 1333 1334 #ifndef NO_BZIP2_SUPPORT 1335 if (method == FT_BZIP2) { 1336 1337 /* XXX */ 1338 if (lflag) { 1339 maybe_warnx("no -l with bzip2 files"); 1340 goto lose; 1341 } 1342 1343 size = unbzip2(fd, zfd, NULL, 0, NULL); 1344 } else 1345 #endif 1346 1347 #ifndef NO_COMPRESS_SUPPORT 1348 if (method == FT_Z) { 1349 FILE *in, *out; 1350 1351 /* XXX */ 1352 if (lflag) { 1353 maybe_warnx("no -l with Lempel-Ziv files"); 1354 goto lose; 1355 } 1356 1357 if ((in = zdopen(fd)) == NULL) { 1358 maybe_warn("zdopen for read: %s", file); 1359 goto lose; 1360 } 1361 1362 out = fdopen(dup(zfd), "w"); 1363 if (out == NULL) { 1364 maybe_warn("fdopen for write: %s", outfile); 1365 fclose(in); 1366 goto lose; 1367 } 1368 1369 size = zuncompress(in, out, NULL, 0, NULL); 1370 /* need to fclose() if ferror() is true... */ 1371 if (ferror(in) | fclose(in)) { 1372 maybe_warn("failed infile fclose"); 1373 unlink(outfile); 1374 (void)fclose(out); 1375 } 1376 if (fclose(out) != 0) { 1377 maybe_warn("failed outfile fclose"); 1378 unlink(outfile); 1379 goto lose; 1380 } 1381 } else 1382 #endif 1383 1384 #ifndef SMALL 1385 if (method == FT_UNKNOWN) { 1386 if (lflag) { 1387 maybe_warnx("no -l for unknown filetypes"); 1388 goto lose; 1389 } 1390 size = cat_fd(NULL, 0, NULL, fd); 1391 } else 1392 #endif 1393 { 1394 if (lflag) { 1395 print_list(fd, isb.st_size, outfile, isb.st_mtime); 1396 close(fd); 1397 return -1; /* XXX */ 1398 } 1399 1400 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1401 } 1402 1403 if (close(fd) != 0) 1404 maybe_warn("couldn't close input"); 1405 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1406 maybe_warn("couldn't close output"); 1407 1408 if (size == -1) { 1409 if (cflag == 0) 1410 unlink(outfile); 1411 maybe_warnx("%s: uncompress failed", file); 1412 return -1; 1413 } 1414 1415 /* if testing, or we uncompressed to stdout, this is all we need */ 1416 #ifndef SMALL 1417 if (tflag) 1418 return size; 1419 #endif 1420 /* if we are uncompressing to stdin, don't remove the file. */ 1421 if (cflag) 1422 return size; 1423 1424 /* 1425 * if we create a file... 1426 */ 1427 /* 1428 * if we can't stat the file don't remove the file. 1429 */ 1430 if (stat(outfile, &osb) < 0) { 1431 maybe_warn("couldn't stat (leaving original): %s", 1432 outfile); 1433 return -1; 1434 } 1435 if (osb.st_size != size) { 1436 maybe_warn("stat gave different size: %" PRIdOFF 1437 " != %" PRIdOFF " (leaving original)", 1438 size, osb.st_size); 1439 unlink(outfile); 1440 return -1; 1441 } 1442 unlink_input(file, &isb); 1443 #ifndef SMALL 1444 copymodes(outfile, &isb); 1445 #endif 1446 return size; 1447 1448 lose: 1449 if (fd != -1) 1450 close(fd); 1451 if (zfd != -1 && zfd != STDOUT_FILENO) 1452 close(fd); 1453 return -1; 1454 } 1455 1456 #ifndef SMALL 1457 static off_t 1458 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd) 1459 { 1460 char buf[BUFLEN]; 1461 size_t rv; 1462 off_t in_tot; 1463 1464 in_tot = count; 1465 if (write(STDOUT_FILENO, prepend, count) != count) { 1466 maybe_warn("write to stdout"); 1467 return -1; 1468 } 1469 for (;;) { 1470 rv = read(fd, buf, sizeof buf); 1471 if (rv == 0) 1472 break; 1473 if (rv < 0) { 1474 maybe_warn("read from fd %d", fd); 1475 break; 1476 } 1477 1478 if (write(STDOUT_FILENO, buf, rv) != rv) { 1479 maybe_warn("write to stdout"); 1480 break; 1481 } 1482 in_tot += rv; 1483 } 1484 1485 if (gsizep) 1486 *gsizep = in_tot; 1487 return (in_tot); 1488 } 1489 #endif 1490 1491 static void 1492 handle_stdin(void) 1493 { 1494 unsigned char header1[4]; 1495 off_t usize, gsize; 1496 enum filetype method; 1497 #ifndef NO_COMPRESS_SUPPORT 1498 FILE *in; 1499 #endif 1500 1501 #ifndef SMALL 1502 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1503 maybe_warnx("standard input is a terminal -- ignoring"); 1504 return; 1505 } 1506 #endif 1507 1508 if (lflag) { 1509 struct stat isb; 1510 1511 /* XXX could read the whole file, etc. */ 1512 if (fstat(STDIN_FILENO, &isb) < 0) { 1513 maybe_warn("fstat"); 1514 return; 1515 } 1516 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime); 1517 return; 1518 } 1519 1520 if (read(STDIN_FILENO, header1, sizeof header1) != sizeof header1) { 1521 maybe_warn("can't read stdin"); 1522 return; 1523 } 1524 1525 method = file_gettype(header1); 1526 switch (method) { 1527 default: 1528 #ifndef SMALL 1529 if (fflag == 0) { 1530 maybe_warnx("unknown compression format"); 1531 return; 1532 } 1533 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO); 1534 break; 1535 #endif 1536 case FT_GZIP: 1537 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1538 header1, sizeof header1, &gsize, "(stdin)"); 1539 break; 1540 #ifndef NO_BZIP2_SUPPORT 1541 case FT_BZIP2: 1542 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1543 header1, sizeof header1, &gsize); 1544 break; 1545 #endif 1546 #ifndef NO_COMPRESS_SUPPORT 1547 case FT_Z: 1548 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1549 maybe_warnx("zopen of stdin"); 1550 return; 1551 } 1552 1553 usize = zuncompress(in, stdout, header1, sizeof header1, &gsize); 1554 fclose(in); 1555 break; 1556 #endif 1557 } 1558 1559 #ifndef SMALL 1560 if (vflag && !tflag && usize != -1 && gsize != -1) 1561 print_verbage(NULL, NULL, usize, gsize); 1562 #endif 1563 1564 } 1565 1566 static void 1567 handle_stdout(void) 1568 { 1569 off_t gsize, usize; 1570 struct stat sb; 1571 time_t systime; 1572 uint32_t mtime; 1573 int ret; 1574 1575 #ifndef SMALL 1576 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1577 maybe_warnx("standard output is a terminal -- ignoring"); 1578 return; 1579 } 1580 #endif 1581 /* If stdin is a file use it's mtime, otherwise use current time */ 1582 ret = fstat(STDIN_FILENO, &sb); 1583 1584 #ifndef SMALL 1585 if (ret < 0) { 1586 maybe_warn("Can't stat stdin"); 1587 return; 1588 } 1589 #endif 1590 1591 if (S_ISREG(sb.st_mode)) 1592 mtime = (uint32_t)sb.st_mtime; 1593 else { 1594 systime = time(NULL); 1595 #ifndef SMALL 1596 if (systime == -1) { 1597 maybe_warn("time"); 1598 return; 1599 } 1600 #endif 1601 mtime = (uint32_t)systime; 1602 } 1603 1604 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime); 1605 #ifndef SMALL 1606 if (vflag && !tflag && usize != -1 && gsize != -1) 1607 print_verbage(NULL, NULL, usize, gsize); 1608 #endif 1609 } 1610 1611 /* do what is asked for, for the path name */ 1612 static void 1613 handle_pathname(char *path) 1614 { 1615 char *opath = path, *s = NULL; 1616 ssize_t len; 1617 int slen; 1618 struct stat sb; 1619 1620 /* check for stdout/stdin */ 1621 if (path[0] == '-' && path[1] == '\0') { 1622 if (dflag) 1623 handle_stdin(); 1624 else 1625 handle_stdout(); 1626 return; 1627 } 1628 1629 retry: 1630 if (stat(path, &sb) < 0) { 1631 /* lets try <path>.gz if we're decompressing */ 1632 if (dflag && s == NULL && errno == ENOENT) { 1633 len = strlen(path); 1634 slen = suffixes[0].ziplen; 1635 s = malloc(len + slen + 1); 1636 if (s == NULL) 1637 maybe_err("malloc"); 1638 memcpy(s, path, len); 1639 memcpy(s + len, suffixes[0].zipped, slen + 1); 1640 path = s; 1641 goto retry; 1642 } 1643 maybe_warn("can't stat: %s", opath); 1644 goto out; 1645 } 1646 1647 if (S_ISDIR(sb.st_mode)) { 1648 #ifndef SMALL 1649 if (rflag) 1650 handle_dir(path, &sb); 1651 else 1652 #endif 1653 maybe_warnx("%s is a directory", path); 1654 goto out; 1655 } 1656 1657 if (S_ISREG(sb.st_mode)) 1658 handle_file(path, &sb); 1659 else 1660 maybe_warnx("%s is not a regular file", path); 1661 1662 out: 1663 if (s) 1664 free(s); 1665 } 1666 1667 /* compress/decompress a file */ 1668 static void 1669 handle_file(char *file, struct stat *sbp) 1670 { 1671 off_t usize, gsize; 1672 char outfile[PATH_MAX]; 1673 1674 infile = file; 1675 if (dflag) { 1676 usize = file_uncompress(file, outfile, sizeof(outfile)); 1677 if (usize == -1) 1678 return; 1679 gsize = sbp->st_size; 1680 } else { 1681 gsize = file_compress(file, outfile, sizeof(outfile)); 1682 if (gsize == -1) 1683 return; 1684 usize = sbp->st_size; 1685 } 1686 1687 1688 #ifndef SMALL 1689 if (vflag && !tflag) 1690 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 1691 #endif 1692 } 1693 1694 #ifndef SMALL 1695 /* this is used with -r to recursively descend directories */ 1696 static void 1697 handle_dir(char *dir, struct stat *sbp) 1698 { 1699 char *path_argv[2]; 1700 FTS *fts; 1701 FTSENT *entry; 1702 1703 path_argv[0] = dir; 1704 path_argv[1] = 0; 1705 fts = fts_open(path_argv, FTS_PHYSICAL, NULL); 1706 if (fts == NULL) { 1707 warn("couldn't fts_open %s", dir); 1708 return; 1709 } 1710 1711 while ((entry = fts_read(fts))) { 1712 switch(entry->fts_info) { 1713 case FTS_D: 1714 case FTS_DP: 1715 continue; 1716 1717 case FTS_DNR: 1718 case FTS_ERR: 1719 case FTS_NS: 1720 maybe_warn("%s", entry->fts_path); 1721 continue; 1722 case FTS_F: 1723 handle_file(entry->fts_name, entry->fts_statp); 1724 } 1725 } 1726 (void)fts_close(fts); 1727 } 1728 #endif 1729 1730 /* print a ratio - size reduction as a fraction of uncompressed size */ 1731 static void 1732 print_ratio(off_t in, off_t out, FILE *where) 1733 { 1734 int percent10; /* 10 * percent */ 1735 off_t diff; 1736 char buff[8]; 1737 int len; 1738 1739 diff = in - out/2; 1740 if (diff <= 0) 1741 /* 1742 * Output is more than double size of input! print -99.9% 1743 * Quite possibly we've failed to get the original size. 1744 */ 1745 percent10 = -999; 1746 else { 1747 /* 1748 * We only need 12 bits of result from the final division, 1749 * so reduce the values until a 32bit division will suffice. 1750 */ 1751 while (in > 0x100000) { 1752 diff >>= 1; 1753 in >>= 1; 1754 } 1755 if (in != 0) 1756 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 1757 else 1758 percent10 = 0; 1759 } 1760 1761 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 1762 /* Move the '.' to before the last digit */ 1763 buff[len - 1] = buff[len - 2]; 1764 buff[len - 2] = '.'; 1765 fprintf(where, "%5s%%", buff); 1766 } 1767 1768 #ifndef SMALL 1769 /* print compression statistics, and the new name (if there is one!) */ 1770 static void 1771 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 1772 { 1773 if (file) 1774 fprintf(stderr, "%s:%s ", file, 1775 strlen(file) < 7 ? "\t\t" : "\t"); 1776 print_ratio(usize, gsize, stderr); 1777 if (nfile) 1778 fprintf(stderr, " -- replaced with %s", nfile); 1779 fprintf(stderr, "\n"); 1780 fflush(stderr); 1781 } 1782 1783 /* print test results */ 1784 static void 1785 print_test(const char *file, int ok) 1786 { 1787 1788 if (exit_value == 0 && ok == 0) 1789 exit_value = 1; 1790 fprintf(stderr, "%s:%s %s\n", file, 1791 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 1792 fflush(stderr); 1793 } 1794 #endif 1795 1796 /* print a file's info ala --list */ 1797 /* eg: 1798 compressed uncompressed ratio uncompressed_name 1799 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 1800 */ 1801 static void 1802 print_list(int fd, off_t out, const char *outfile, time_t ts) 1803 { 1804 static int first = 1; 1805 #ifndef SMALL 1806 static off_t in_tot, out_tot; 1807 uint32_t crc; 1808 #endif 1809 off_t in; 1810 int rv; 1811 1812 if (first) { 1813 #ifndef SMALL 1814 if (vflag) 1815 printf("method crc date time "); 1816 #endif 1817 if (qflag == 0) 1818 printf(" compressed uncompressed " 1819 "ratio uncompressed_name\n"); 1820 } 1821 first = 0; 1822 1823 /* print totals? */ 1824 #ifndef SMALL 1825 if (fd == -1) { 1826 in = in_tot; 1827 out = out_tot; 1828 } else 1829 #endif 1830 { 1831 /* read the last 4 bytes - this is the uncompressed size */ 1832 rv = lseek(fd, (off_t)(-8), SEEK_END); 1833 if (rv != -1) { 1834 unsigned char buf[8]; 1835 uint32_t usize; 1836 1837 if (read(fd, (char *)buf, sizeof(buf)) != sizeof(buf)) 1838 maybe_warn("read of uncompressed size"); 1839 usize = buf[4] | buf[5] << 8 | buf[6] << 16 | buf[7] << 24; 1840 in = (off_t)usize; 1841 #ifndef SMALL 1842 crc = buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24; 1843 #endif 1844 } 1845 } 1846 1847 #ifndef SMALL 1848 if (vflag && fd == -1) 1849 printf(" "); 1850 else if (vflag) { 1851 char *date = ctime(&ts); 1852 1853 /* skip the day, 1/100th second, and year */ 1854 date += 4; 1855 date[12] = 0; 1856 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 1857 } 1858 in_tot += in; 1859 out_tot += out; 1860 #endif 1861 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 1862 print_ratio(in, out, stdout); 1863 printf(" %s\n", outfile); 1864 } 1865 1866 /* display the usage of NetBSD gzip */ 1867 static void 1868 usage(void) 1869 { 1870 1871 fprintf(stderr, "%s\n", gzip_version); 1872 fprintf(stderr, 1873 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n" 1874 #ifndef SMALL 1875 " -c --stdout write to stdout, keep original files\n" 1876 " --to-stdout\n" 1877 " -d --decompress uncompress files\n" 1878 " --uncompress\n" 1879 " -f --force force overwriting & compress links\n" 1880 " -h --help display this help\n" 1881 " -n --no-name don't save original file name or time stamp\n" 1882 " -N --name save or restore original file name and time stamp\n" 1883 " -q --quiet output no warnings\n" 1884 " -r --recursive recursively compress files in directories\n" 1885 " -S .suf use suffix .suf instead of .gz\n" 1886 " --suffix .suf\n" 1887 " -t --test test compressed file\n" 1888 " -v --verbose print extra statistics\n" 1889 " -V --version display program version\n" 1890 " -1 --fast fastest (worst) compression\n" 1891 " -2 .. -8 set compression level\n" 1892 " -9 --best best (slowest) compression\n", 1893 #else 1894 , 1895 #endif 1896 getprogname()); 1897 exit(0); 1898 } 1899 1900 /* display the version of NetBSD gzip */ 1901 static void 1902 display_version(void) 1903 { 1904 1905 fprintf(stderr, "%s\n", gzip_version); 1906 exit(0); 1907 } 1908 1909 #ifndef NO_BZIP2_SUPPORT 1910 #include "unbzip2.c" 1911 #endif 1912 #ifndef NO_COMPRESS_SUPPORT 1913 #include "zuncompress.c" 1914 #endif 1915