1 /* $NetBSD: gzip.c,v 1.67 2004/09/11 11:07:44 dsl Exp $ */ 2 /* $DragonFly: src/usr.bin/gzip/gzip.c,v 1.5 2005/01/31 19:28:57 y0netan1 Exp $ */ 3 4 /* 5 * Copyright (c) 1997, 1998, 2003, 2004 Matthew R. Green 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * gzip.c -- GPL free gzip using zlib. 34 * 35 * RFC 1950 covers the zlib format 36 * RFC 1951 covers the deflate format 37 * RFC 1952 covers the gzip format 38 * 39 * TODO: 40 * - use mmap where possible 41 * - handle some signals better (remove outfile?) 42 * - make bzip2/compress -v/-t/-l support work as well as possible 43 */ 44 45 #include <sys/param.h> 46 #include <sys/stat.h> 47 #include <sys/time.h> 48 49 #include <err.h> 50 #include <errno.h> 51 #include <fcntl.h> 52 #include <fts.h> 53 #include <getopt.h> 54 #include <inttypes.h> 55 #include <libgen.h> 56 #include <stdarg.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <unistd.h> 61 #include <zlib.h> 62 63 #ifndef PRIdOFF 64 #define PRIdOFF PRId64 65 #endif 66 67 #ifndef PRId64 68 #define PRId64 "lld" 69 #endif 70 71 /* what type of file are we dealing with */ 72 enum filetype { 73 FT_GZIP, 74 #ifndef NO_BZIP2_SUPPORT 75 FT_BZIP2, 76 #endif 77 #ifndef NO_COMPRESS_SUPPORT 78 FT_Z, 79 #endif 80 FT_LAST, 81 FT_UNKNOWN 82 }; 83 84 #ifndef NO_BZIP2_SUPPORT 85 #include <bzlib.h> 86 87 #define BZ2_SUFFIX ".bz2" 88 #define BZIP2_MAGIC "\102\132\150" 89 #endif 90 91 #ifndef NO_COMPRESS_SUPPORT 92 #define Z_SUFFIX ".Z" 93 #define Z_MAGIC "\037\235" 94 #endif 95 96 #define GZ_SUFFIX ".gz" 97 98 #define BUFLEN (64 * 1024) 99 100 #define GZIP_MAGIC0 0x1F 101 #define GZIP_MAGIC1 0x8B 102 #define GZIP_OMAGIC1 0x9E 103 104 #define GZIP_TIMESTAMP (off_t)4 105 #define GZIP_ORIGNAME (off_t)10 106 107 #define HEAD_CRC 0x02 108 #define EXTRA_FIELD 0x04 109 #define ORIG_NAME 0x08 110 #define COMMENT 0x10 111 112 #define OS_CODE 3 /* Unix */ 113 114 typedef struct { 115 const char *zipped; 116 int ziplen; 117 const char *normal; /* for unzip - must not be longer than zipped */ 118 } suffixes_t; 119 static suffixes_t suffixes[] = { 120 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N} 121 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */ 122 #ifndef SMALL 123 SUFFIX(GZ_SUFFIX, ""), 124 SUFFIX(".z", ""), 125 SUFFIX("-gz", ""), 126 SUFFIX("-z", ""), 127 SUFFIX("_z", ""), 128 SUFFIX(".taz", ".tar"), 129 SUFFIX(".tgz", ".tar"), 130 #ifndef NO_BZIP2_SUPPORT 131 SUFFIX(BZ2_SUFFIX, ""), 132 #endif 133 #ifndef NO_COMPRESS_SUPPORT 134 SUFFIX(Z_SUFFIX, ""), 135 #endif 136 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */ 137 #endif /* SMALL */ 138 #undef SUFFIX 139 }; 140 #define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0]) 141 142 static const char gzip_version[] = "NetBSD gzip 20040830"; 143 144 static int cflag; /* stdout mode */ 145 static int dflag; /* decompress mode */ 146 static int lflag; /* list mode */ 147 static int numflag = 6; /* gzip -1..-9 value */ 148 149 #ifndef SMALL 150 static int fflag; /* force mode */ 151 static int nflag; /* don't save name/timestamp */ 152 static int Nflag; /* don't restore name/timestamp */ 153 static int qflag; /* quiet mode */ 154 static int rflag; /* recursive mode */ 155 static int tflag; /* test */ 156 static int vflag; /* verbose mode */ 157 #else 158 #define qflag 0 159 #define tflag 0 160 #endif 161 162 static int exit_value = 0; /* exit value */ 163 164 static char *infile; /* name of file coming in */ 165 166 static void maybe_err(const char *fmt, ...) 167 __attribute__((__format__(__printf__, 1, 2))); 168 #ifndef NO_BZIP2_SUPPORT 169 static void maybe_errx(const char *fmt, ...) 170 __attribute__((__format__(__printf__, 1, 2))); 171 #endif 172 static void maybe_warn(const char *fmt, ...) 173 __attribute__((__format__(__printf__, 1, 2))); 174 static void maybe_warnx(const char *fmt, ...) 175 __attribute__((__format__(__printf__, 1, 2))); 176 static enum filetype file_gettype(u_char *); 177 #ifdef SMALL 178 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz) 179 #endif 180 static off_t gz_compress(int, int, off_t *, const char *, uint32_t); 181 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *); 182 static off_t file_compress(char *, char *, size_t); 183 static off_t file_uncompress(char *, char *, size_t); 184 static void handle_pathname(char *); 185 static void handle_file(char *, struct stat *); 186 static void handle_stdin(void); 187 static void handle_stdout(void); 188 static void print_ratio(off_t, off_t, FILE *); 189 static void print_list(int fd, off_t, const char *, time_t); 190 static void usage(void); 191 static void display_version(void); 192 static const suffixes_t *check_suffix(char *, int); 193 194 #ifdef SMALL 195 #define unlink_input(f, sb) unlink(f) 196 #else 197 static off_t cat_fd(unsigned char *, ssize_t, off_t *, int fd); 198 static void prepend_gzip(char *, int *, char ***); 199 static void handle_dir(char *); 200 static void print_verbage(const char *, const char *, off_t, off_t); 201 static void print_test(const char *, int); 202 static void copymodes(const char *, struct stat *); 203 static int check_outfile(const char *outfile, struct stat *sb); 204 #endif 205 206 #ifndef NO_BZIP2_SUPPORT 207 static off_t unbzip2(int, int, char *, size_t, off_t *); 208 #endif 209 210 #ifndef NO_COMPRESS_SUPPORT 211 static FILE *zdopen(int); 212 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *); 213 #endif 214 215 int main(int, char *p[]); 216 217 #ifdef SMALL 218 #define getopt_long(a,b,c,d,e) getopt(a,b,c) 219 #else 220 static const struct option longopts[] = { 221 { "stdout", no_argument, 0, 'c' }, 222 { "to-stdout", no_argument, 0, 'c' }, 223 { "decompress", no_argument, 0, 'd' }, 224 { "uncompress", no_argument, 0, 'd' }, 225 { "force", no_argument, 0, 'f' }, 226 { "help", no_argument, 0, 'h' }, 227 { "list", no_argument, 0, 'l' }, 228 { "no-name", no_argument, 0, 'n' }, 229 { "name", no_argument, 0, 'N' }, 230 { "quiet", no_argument, 0, 'q' }, 231 { "recursive", no_argument, 0, 'r' }, 232 { "suffix", required_argument, 0, 'S' }, 233 { "test", no_argument, 0, 't' }, 234 { "verbose", no_argument, 0, 'v' }, 235 { "version", no_argument, 0, 'V' }, 236 { "fast", no_argument, 0, '1' }, 237 { "best", no_argument, 0, '9' }, 238 #if 0 239 /* 240 * This is what else GNU gzip implements. --ascii isn't useful 241 * on NetBSD, and I don't care to have a --license. 242 */ 243 { "ascii", no_argument, 0, 'a' }, 244 { "license", no_argument, 0, 'L' }, 245 #endif 246 { NULL, no_argument, 0, 0 }, 247 }; 248 #endif 249 250 int 251 main(int argc, char **argv) 252 { 253 const char *progname = getprogname(); 254 #ifndef SMALL 255 char *gzip; 256 int len; 257 #endif 258 int ch; 259 260 /* XXX set up signals */ 261 262 #ifndef SMALL 263 if ((gzip = getenv("GZIP")) != NULL) 264 prepend_gzip(gzip, &argc, &argv); 265 #endif 266 267 /* 268 * XXX 269 * handle being called `gunzip', `zcat' and `gzcat' 270 */ 271 if (strcmp(progname, "gunzip") == 0) 272 dflag = 1; 273 else if (strcmp(progname, "zcat") == 0 || 274 strcmp(progname, "gzcat") == 0) 275 dflag = cflag = 1; 276 277 #ifdef SMALL 278 #define OPT_LIST "cdhHltV123456789" 279 #else 280 #define OPT_LIST "cdfhHlnNqrS:tvV123456789" 281 #endif 282 283 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) { 284 switch (ch) { 285 case 'c': 286 cflag = 1; 287 break; 288 case 'd': 289 dflag = 1; 290 break; 291 case 'l': 292 lflag = 1; 293 dflag = 1; 294 break; 295 case 'V': 296 display_version(); 297 /* NOTREACHED */ 298 case '1': case '2': case '3': 299 case '4': case '5': case '6': 300 case '7': case '8': case '9': 301 numflag = ch - '0'; 302 break; 303 #ifndef SMALL 304 case 'f': 305 fflag = 1; 306 break; 307 case 'n': 308 nflag = 1; 309 Nflag = 0; 310 break; 311 case 'N': 312 nflag = 0; 313 Nflag = 1; 314 break; 315 case 'q': 316 qflag = 1; 317 break; 318 case 'r': 319 rflag = 1; 320 break; 321 case 'S': 322 len = strlen(optarg); 323 if (len != 0) { 324 suffixes[0].zipped = optarg; 325 suffixes[0].ziplen = len; 326 } else { 327 suffixes[NUM_SUFFIXES - 1].zipped = ""; 328 suffixes[NUM_SUFFIXES - 1].ziplen = 0; 329 } 330 break; 331 case 't': 332 cflag = 1; 333 tflag = 1; 334 dflag = 1; 335 break; 336 case 'v': 337 vflag = 1; 338 break; 339 #endif 340 default: 341 usage(); 342 /* NOTREACHED */ 343 } 344 } 345 argv += optind; 346 argc -= optind; 347 348 if (argc == 0) { 349 if (dflag) /* stdin mode */ 350 handle_stdin(); 351 else /* stdout mode */ 352 handle_stdout(); 353 } else { 354 do { 355 handle_pathname(argv[0]); 356 } while (*++argv); 357 } 358 #ifndef SMALL 359 if (qflag == 0 && lflag && argc > 1) 360 print_list(-1, 0, "(totals)", 0); 361 #endif 362 exit(exit_value); 363 } 364 365 /* maybe print a warning */ 366 void 367 maybe_warn(const char *fmt, ...) 368 { 369 va_list ap; 370 371 if (qflag == 0) { 372 va_start(ap, fmt); 373 vwarn(fmt, ap); 374 va_end(ap); 375 } 376 if (exit_value == 0) 377 exit_value = 1; 378 } 379 380 /* ... without an errno. */ 381 void 382 maybe_warnx(const char *fmt, ...) 383 { 384 va_list ap; 385 386 if (qflag == 0) { 387 va_start(ap, fmt); 388 vwarnx(fmt, ap); 389 va_end(ap); 390 } 391 if (exit_value == 0) 392 exit_value = 1; 393 } 394 395 /* maybe print an error */ 396 void 397 maybe_err(const char *fmt, ...) 398 { 399 va_list ap; 400 401 if (qflag == 0) { 402 va_start(ap, fmt); 403 vwarn(fmt, ap); 404 va_end(ap); 405 } 406 exit(2); 407 } 408 409 #ifndef NO_BZIP2_SUPPORT 410 /* ... without an errno. */ 411 void 412 maybe_errx(const char *fmt, ...) 413 { 414 va_list ap; 415 416 if (qflag == 0) { 417 va_start(ap, fmt); 418 vwarnx(fmt, ap); 419 va_end(ap); 420 } 421 exit(2); 422 } 423 #endif 424 425 #ifndef SMALL 426 /* split up $GZIP and prepend it to the argument list */ 427 static void 428 prepend_gzip(char *gzip, int *argc, char ***argv) 429 { 430 char *s, **nargv, **ac; 431 int nenvarg = 0, i; 432 433 /* scan how many arguments there are */ 434 for (s = gzip;;) { 435 while (*s == ' ' || *s == '\t') 436 s++; 437 if (*s == 0) 438 goto count_done; 439 nenvarg++; 440 while (*s != ' ' && *s != '\t') 441 if (*s++ == 0) 442 goto count_done; 443 } 444 count_done: 445 /* punt early */ 446 if (nenvarg == 0) 447 return; 448 449 *argc += nenvarg; 450 ac = *argv; 451 452 nargv = (char **)malloc((*argc + 1) * sizeof(char *)); 453 if (nargv == NULL) 454 maybe_err("malloc"); 455 456 /* stash this away */ 457 *argv = nargv; 458 459 /* copy the program name first */ 460 i = 0; 461 nargv[i++] = *(ac++); 462 463 /* take a copy of $GZIP and add it to the array */ 464 s = strdup(gzip); 465 if (s == NULL) 466 maybe_err("strdup"); 467 for (;;) { 468 /* Skip whitespaces. */ 469 while (*s == ' ' || *s == '\t') 470 s++; 471 if (*s == 0) 472 goto copy_done; 473 nargv[i++] = s; 474 /* Find the end of this argument. */ 475 while (*s != ' ' && *s != '\t') 476 if (*s++ == 0) 477 /* Argument followed by NUL. */ 478 goto copy_done; 479 /* Terminate by overwriting ' ' or '\t' with NUL. */ 480 *s++ = 0; 481 } 482 copy_done: 483 484 /* copy the original arguments and a NULL */ 485 while (*ac) 486 nargv[i++] = *(ac++); 487 nargv[i] = NULL; 488 } 489 #endif 490 491 /* compress input to output. Return bytes read, -1 on error */ 492 static off_t 493 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime) 494 { 495 z_stream z; 496 char *outbufp, *inbufp; 497 off_t in_tot = 0, out_tot = 0; 498 ssize_t in_size; 499 int i, error; 500 uLong crc; 501 #ifdef SMALL 502 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0, 503 0, 0, 0, 0, 504 0, OS_CODE }; 505 #endif 506 507 outbufp = malloc(BUFLEN); 508 inbufp = malloc(BUFLEN); 509 if (outbufp == NULL || inbufp == NULL) { 510 maybe_err("malloc failed"); 511 goto out; 512 } 513 514 memset(&z, 0, sizeof z); 515 z.zalloc = Z_NULL; 516 z.zfree = Z_NULL; 517 z.opaque = 0; 518 519 #ifdef SMALL 520 memcpy(outbufp, header, sizeof header); 521 i = sizeof header; 522 #else 523 if (nflag != 0) { 524 mtime = 0; 525 origname = ""; 526 } 527 528 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s", 529 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 530 *origname ? ORIG_NAME : 0, 531 mtime & 0xff, 532 (mtime >> 8) & 0xff, 533 (mtime >> 16) & 0xff, 534 (mtime >> 24) & 0xff, 535 numflag == 1 ? 4 : numflag == 9 ? 2 : 0, 536 OS_CODE, origname); 537 if (i >= BUFLEN) 538 /* this need PATH_MAX > BUFLEN ... */ 539 maybe_err("snprintf"); 540 if (*origname) 541 i++; 542 #endif 543 544 z.next_out = outbufp + i; 545 z.avail_out = BUFLEN - i; 546 547 error = deflateInit2(&z, numflag, Z_DEFLATED, 548 -MAX_WBITS, 8, Z_DEFAULT_STRATEGY); 549 if (error != Z_OK) { 550 maybe_warnx("deflateInit2 failed"); 551 in_tot = -1; 552 goto out; 553 } 554 555 crc = crc32(0L, Z_NULL, 0); 556 for (;;) { 557 if (z.avail_out == 0) { 558 if (write(out, outbufp, BUFLEN) != BUFLEN) { 559 maybe_warn("write"); 560 in_tot = -1; 561 goto out; 562 } 563 564 out_tot += BUFLEN; 565 z.next_out = outbufp; 566 z.avail_out = BUFLEN; 567 } 568 569 if (z.avail_in == 0) { 570 in_size = read(in, inbufp, BUFLEN); 571 if (in_size < 0) { 572 maybe_warn("read"); 573 in_tot = -1; 574 goto out; 575 } 576 if (in_size == 0) 577 break; 578 579 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size); 580 in_tot += in_size; 581 z.next_in = inbufp; 582 z.avail_in = in_size; 583 } 584 585 error = deflate(&z, Z_NO_FLUSH); 586 if (error != Z_OK && error != Z_STREAM_END) { 587 maybe_warnx("deflate failed"); 588 in_tot = -1; 589 goto out; 590 } 591 } 592 593 /* clean up */ 594 for (;;) { 595 ssize_t len; 596 597 error = deflate(&z, Z_FINISH); 598 if (error != Z_OK && error != Z_STREAM_END) { 599 maybe_warnx("deflate failed"); 600 in_tot = -1; 601 goto out; 602 } 603 604 len = (char *)z.next_out - outbufp; 605 606 if (write(out, outbufp, len) != len) { 607 maybe_warn("write"); 608 out_tot = -1; 609 goto out; 610 } 611 out_tot += len; 612 z.next_out = outbufp; 613 z.avail_out = BUFLEN; 614 615 if (error == Z_STREAM_END) 616 break; 617 } 618 619 if (deflateEnd(&z) != Z_OK) { 620 maybe_warnx("deflateEnd failed"); 621 in_tot = -1; 622 goto out; 623 } 624 625 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c", 626 (int)crc & 0xff, 627 (int)(crc >> 8) & 0xff, 628 (int)(crc >> 16) & 0xff, 629 (int)(crc >> 24) & 0xff, 630 (int)in_tot & 0xff, 631 (int)(in_tot >> 8) & 0xff, 632 (int)(in_tot >> 16) & 0xff, 633 (int)(in_tot >> 24) & 0xff); 634 if (i != 8) 635 maybe_err("snprintf"); 636 if (write(out, outbufp, i) != i) { 637 maybe_warn("write"); 638 in_tot = -1; 639 } else 640 out_tot += i; 641 642 out: 643 if (inbufp != NULL) 644 free(inbufp); 645 if (outbufp != NULL) 646 free(outbufp); 647 if (gsizep) 648 *gsizep = out_tot; 649 return in_tot; 650 } 651 652 /* 653 * uncompress input to output then close the input. return the 654 * uncompressed size written, and put the compressed sized read 655 * into `*gsizep'. 656 */ 657 static off_t 658 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep, 659 const char *filename) 660 { 661 z_stream z; 662 char *outbufp, *inbufp; 663 off_t out_tot = prelen, in_tot = 0; 664 uint32_t out_sub_tot = 0; 665 enum { 666 GZSTATE_MAGIC0, 667 GZSTATE_MAGIC1, 668 GZSTATE_METHOD, 669 GZSTATE_FLAGS, 670 GZSTATE_SKIPPING, 671 GZSTATE_EXTRA, 672 GZSTATE_EXTRA2, 673 GZSTATE_EXTRA3, 674 GZSTATE_ORIGNAME, 675 GZSTATE_COMMENT, 676 GZSTATE_HEAD_CRC1, 677 GZSTATE_HEAD_CRC2, 678 GZSTATE_INIT, 679 GZSTATE_READ, 680 GZSTATE_CRC, 681 GZSTATE_LEN, 682 } state = GZSTATE_MAGIC0; 683 int flags = 0, skip_count = 0; 684 int error = 0, done_reading = 0; 685 uLong crc = 0; 686 ssize_t wr; 687 688 #define ADVANCE() { z.next_in++; z.avail_in--; } 689 690 if ((outbufp = malloc(BUFLEN)) == NULL) { 691 maybe_err("malloc failed"); 692 goto out2; 693 } 694 if ((inbufp = malloc(BUFLEN)) == NULL) { 695 maybe_err("malloc failed"); 696 goto out1; 697 } 698 699 memset(&z, 0, sizeof z); 700 z.avail_in = prelen; 701 z.next_in = pre; 702 z.avail_out = BUFLEN; 703 z.next_out = outbufp; 704 z.zalloc = NULL; 705 z.zfree = NULL; 706 z.opaque = 0; 707 708 709 for (;;) { 710 if (z.avail_in == 0 && done_reading == 0) { 711 ssize_t in_size = read(in, inbufp, BUFLEN); 712 713 if (in_size == -1) { 714 #ifndef SMALL 715 if (tflag && vflag) 716 print_test(filename, 0); 717 #endif 718 maybe_warn("failed to read stdin"); 719 out_tot = -1; 720 goto stop; 721 } else if (in_size == 0) 722 done_reading = 1; 723 724 z.avail_in = in_size; 725 z.next_in = inbufp; 726 727 in_tot += in_size; 728 } 729 if (z.avail_in == 0) { 730 if (done_reading && state != GZSTATE_MAGIC0) 731 maybe_warnx("%s: unexpected end of file", 732 filename); 733 goto stop; 734 } 735 switch (state) { 736 case GZSTATE_MAGIC0: 737 if (*z.next_in != GZIP_MAGIC0) { 738 maybe_warnx("input not gziped (MAGIC0)"); 739 out_tot = -1; 740 goto stop; 741 } 742 ADVANCE(); 743 state++; 744 out_sub_tot = 0; 745 crc = crc32(0L, Z_NULL, 0); 746 break; 747 748 case GZSTATE_MAGIC1: 749 if (*z.next_in != GZIP_MAGIC1 && 750 *z.next_in != GZIP_OMAGIC1) { 751 maybe_warnx("input not gziped (MAGIC1)"); 752 out_tot = -1; 753 goto stop; 754 } 755 ADVANCE(); 756 state++; 757 break; 758 759 case GZSTATE_METHOD: 760 if (*z.next_in != Z_DEFLATED) { 761 maybe_warnx("unknown compression method"); 762 out_tot = -1; 763 goto stop; 764 } 765 ADVANCE(); 766 state++; 767 break; 768 769 case GZSTATE_FLAGS: 770 flags = *z.next_in; 771 ADVANCE(); 772 skip_count = 6; 773 state++; 774 break; 775 776 case GZSTATE_SKIPPING: 777 if (skip_count > 0) { 778 skip_count--; 779 ADVANCE(); 780 } else 781 state++; 782 break; 783 784 case GZSTATE_EXTRA: 785 if ((flags & EXTRA_FIELD) == 0) { 786 state = GZSTATE_ORIGNAME; 787 break; 788 } 789 skip_count = *z.next_in; 790 ADVANCE(); 791 state++; 792 break; 793 794 case GZSTATE_EXTRA2: 795 skip_count |= ((*z.next_in) << 8); 796 ADVANCE(); 797 state++; 798 break; 799 800 case GZSTATE_EXTRA3: 801 if (skip_count > 0) { 802 skip_count--; 803 ADVANCE(); 804 } else 805 state++; 806 break; 807 808 case GZSTATE_ORIGNAME: 809 if ((flags & ORIG_NAME) == 0) { 810 state++; 811 break; 812 } 813 if (*z.next_in == 0) 814 state++; 815 ADVANCE(); 816 break; 817 818 case GZSTATE_COMMENT: 819 if ((flags & COMMENT) == 0) { 820 state++; 821 break; 822 } 823 if (*z.next_in == 0) 824 state++; 825 ADVANCE(); 826 break; 827 828 case GZSTATE_HEAD_CRC1: 829 if (flags & HEAD_CRC) 830 skip_count = 2; 831 else 832 skip_count = 0; 833 state++; 834 break; 835 836 case GZSTATE_HEAD_CRC2: 837 if (skip_count > 0) { 838 skip_count--; 839 ADVANCE(); 840 } else 841 state++; 842 break; 843 844 case GZSTATE_INIT: 845 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) { 846 maybe_warnx("failed to inflateInit"); 847 out_tot = -1; 848 goto stop; 849 } 850 state++; 851 break; 852 853 case GZSTATE_READ: 854 error = inflate(&z, Z_FINISH); 855 /* Z_BUF_ERROR goes with Z_FINISH... */ 856 if (error != Z_STREAM_END && error != Z_BUF_ERROR) 857 /* Just need more input */ 858 break; 859 wr = BUFLEN - z.avail_out; 860 861 if (wr != 0) { 862 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 863 if ( 864 #ifndef SMALL 865 /* don't write anything with -t */ 866 tflag == 0 && 867 #endif 868 write(out, outbufp, wr) != wr) { 869 maybe_warn("error writing to output"); 870 out_tot = -1; 871 goto stop; 872 } 873 874 out_tot += wr; 875 out_sub_tot += wr; 876 } 877 878 if (error == Z_STREAM_END) { 879 inflateEnd(&z); 880 state++; 881 } 882 883 z.next_out = outbufp; 884 z.avail_out = BUFLEN; 885 886 break; 887 case GZSTATE_CRC: 888 { 889 static int empty_buffer = 0; 890 uLong origcrc; 891 892 if (z.avail_in < 4) { 893 if (!done_reading && empty_buffer++ < 4) 894 continue; 895 maybe_warnx("truncated input"); 896 out_tot = -1; 897 goto stop; 898 } 899 empty_buffer = 0; 900 origcrc = ((unsigned)z.next_in[0] & 0xff) | 901 ((unsigned)z.next_in[1] & 0xff) << 8 | 902 ((unsigned)z.next_in[2] & 0xff) << 16 | 903 ((unsigned)z.next_in[3] & 0xff) << 24; 904 if (origcrc != crc) { 905 maybe_warnx("invalid compressed" 906 " data--crc error"); 907 out_tot = -1; 908 goto stop; 909 } 910 } 911 912 z.avail_in -= 4; 913 z.next_in += 4; 914 915 if (!z.avail_in) 916 goto stop; 917 state++; 918 break; 919 case GZSTATE_LEN: 920 { 921 static int empty_buffer = 0; 922 uLong origlen; 923 924 if (z.avail_in < 4) { 925 if (!done_reading && empty_buffer++ < 4) 926 continue; 927 maybe_warnx("truncated input"); 928 out_tot = -1; 929 goto stop; 930 } 931 empty_buffer = 0; 932 origlen = ((unsigned)z.next_in[0] & 0xff) | 933 ((unsigned)z.next_in[1] & 0xff) << 8 | 934 ((unsigned)z.next_in[2] & 0xff) << 16 | 935 ((unsigned)z.next_in[3] & 0xff) << 24; 936 937 if (origlen != out_sub_tot) { 938 maybe_warnx("invalid compressed" 939 " data--length error"); 940 out_tot = -1; 941 goto stop; 942 } 943 } 944 945 z.avail_in -= 4; 946 z.next_in += 4; 947 948 if (error < 0) { 949 maybe_warnx("decompression error"); 950 out_tot = -1; 951 goto stop; 952 } 953 state = GZSTATE_MAGIC0; 954 break; 955 } 956 continue; 957 stop: 958 break; 959 } 960 if (state > GZSTATE_INIT) 961 inflateEnd(&z); 962 963 #ifndef SMALL 964 if (tflag && vflag) 965 print_test(filename, out_tot != -1); 966 #endif 967 968 free(inbufp); 969 out1: 970 free(outbufp); 971 out2: 972 if (gsizep) 973 *gsizep = in_tot; 974 return (out_tot); 975 } 976 977 #ifndef SMALL 978 /* 979 * set the owner, mode, flags & utimes for a file 980 */ 981 static void 982 copymodes(const char *file, struct stat *sbp) 983 { 984 struct timeval times[2]; 985 986 /* 987 * If we have no info on the input, give this file some 988 * default values and return.. 989 */ 990 if (sbp == NULL) { 991 mode_t mask = umask(022); 992 993 (void)chmod(file, DEFFILEMODE & ~mask); 994 (void)umask(mask); 995 return; 996 } 997 998 /* if the chown fails, remove set-id bits as-per compress(1) */ 999 if (chown(file, sbp->st_uid, sbp->st_gid) < 0) { 1000 if (errno != EPERM) 1001 maybe_warn("couldn't chown: %s", file); 1002 sbp->st_mode &= ~(S_ISUID|S_ISGID); 1003 } 1004 1005 /* we only allow set-id and the 9 normal permission bits */ 1006 sbp->st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1007 if (chmod(file, sbp->st_mode) < 0) 1008 maybe_warn("couldn't chmod: %s", file); 1009 1010 /* only try flags if they exist already */ 1011 if (sbp->st_flags != 0 && chflags(file, sbp->st_flags) < 0) 1012 maybe_warn("couldn't chflags: %s", file); 1013 1014 TIMESPEC_TO_TIMEVAL(×[0], &sbp->st_atimespec); 1015 TIMESPEC_TO_TIMEVAL(×[1], &sbp->st_mtimespec); 1016 if (utimes(file, times) < 0) 1017 maybe_warn("couldn't utimes: %s", file); 1018 } 1019 #endif 1020 1021 /* what sort of file is this? */ 1022 static enum filetype 1023 file_gettype(u_char *buf) 1024 { 1025 1026 if (buf[0] == GZIP_MAGIC0 && 1027 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1028 return FT_GZIP; 1029 else 1030 #ifndef NO_BZIP2_SUPPORT 1031 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1032 buf[3] >= '0' && buf[3] <= '9') 1033 return FT_BZIP2; 1034 else 1035 #endif 1036 #ifndef NO_COMPRESS_SUPPORT 1037 if (memcmp(buf, Z_MAGIC, 2) == 0) 1038 return FT_Z; 1039 else 1040 #endif 1041 return FT_UNKNOWN; 1042 } 1043 1044 #ifndef SMALL 1045 /* check the outfile is OK. */ 1046 static int 1047 check_outfile(const char *outfile, struct stat *sb) 1048 { 1049 int ok = 1; 1050 1051 if (lflag == 0 && stat(outfile, sb) == 0) { 1052 if (fflag) 1053 unlink(outfile); 1054 else if (isatty(STDIN_FILENO)) { 1055 char ans[10] = { 'n', '\0' }; /* default */ 1056 1057 fprintf(stderr, "%s already exists -- do you wish to " 1058 "overwrite (y or n)? " , outfile); 1059 (void)fgets(ans, sizeof(ans) - 1, stdin); 1060 if (ans[0] != 'y' && ans[0] != 'Y') { 1061 fprintf(stderr, "\tnot overwritting\n"); 1062 ok = 0; 1063 } else 1064 unlink(outfile); 1065 } else { 1066 maybe_warnx("%s already exists -- skipping", outfile); 1067 ok = 0; 1068 } 1069 } 1070 return ok; 1071 } 1072 1073 static void 1074 unlink_input(const char *file, struct stat *sb) 1075 { 1076 struct stat nsb; 1077 1078 if (stat(file, &nsb) != 0) 1079 /* Must be gone alrady */ 1080 return; 1081 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1082 /* Definitely a different file */ 1083 return; 1084 unlink(file); 1085 } 1086 #endif 1087 1088 static const suffixes_t * 1089 check_suffix(char *file, int xlate) 1090 { 1091 const suffixes_t *s; 1092 int len = strlen(file); 1093 char *sp; 1094 1095 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1096 /* if it doesn't fit in "a.suf", don't bother */ 1097 if (s->ziplen >= len) 1098 continue; 1099 sp = file + len - s->ziplen; 1100 if (strcmp(s->zipped, sp) != 0) 1101 continue; 1102 if (xlate) 1103 strcpy(sp, s->normal); 1104 return s; 1105 } 1106 return NULL; 1107 } 1108 1109 /* 1110 * compress the given file: create a corresponding .gz file and remove the 1111 * original. 1112 */ 1113 static off_t 1114 file_compress(char *file, char *outfile, size_t outsize) 1115 { 1116 int in; 1117 int out; 1118 off_t size, insize; 1119 #ifndef SMALL 1120 struct stat isb, osb; 1121 const suffixes_t *suff; 1122 #endif 1123 1124 in = open(file, O_RDONLY); 1125 if (in == -1) { 1126 maybe_warn("can't open %s", file); 1127 return -1; 1128 } 1129 1130 if (cflag == 0) { 1131 #ifndef SMALL 1132 if (stat(file, &isb) == 0) { 1133 if (isb.st_nlink > 1 && fflag == 0) { 1134 maybe_warnx("%s has %d other link%s -- " 1135 "skipping", file, isb.st_nlink - 1, 1136 isb.st_nlink == 1 ? "" : "s"); 1137 close(in); 1138 return -1; 1139 } 1140 } 1141 1142 if (fflag == 0 && (suff = check_suffix(file, 0)) 1143 && suff->zipped[0] != 0) { 1144 maybe_warnx("%s already has %s suffix -- unchanged", 1145 file, suff->zipped); 1146 close(in); 1147 return -1; 1148 } 1149 #endif 1150 1151 /* Add (usually) .gz to filename */ 1152 if ((size_t)snprintf(outfile, outsize, "%s%s", 1153 file, suffixes[0].zipped) >= outsize) 1154 memcpy(outfile - suffixes[0].ziplen - 1, 1155 suffixes[0].zipped, suffixes[0].ziplen + 1); 1156 1157 #ifndef SMALL 1158 if (check_outfile(outfile, &osb) == 0) { 1159 close(in); 1160 return -1; 1161 } 1162 #endif 1163 } 1164 1165 if (cflag == 0) { 1166 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600); 1167 if (out == -1) { 1168 maybe_warn("could not create output: %s", outfile); 1169 fclose(stdin); 1170 return -1; 1171 } 1172 } else 1173 out = STDOUT_FILENO; 1174 1175 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1176 1177 (void)close(in); 1178 1179 /* 1180 * If there was an error, insize will be -1. 1181 * If we compressed to stdout, just return the size. 1182 * Otherwise stat the file and check it is the correct size. 1183 * We only blow away the file if we can stat the output and it 1184 * has the expected size. 1185 */ 1186 if (cflag != 0) 1187 return insize == -1 ? -1 : size; 1188 1189 if (close(out) == -1) 1190 maybe_warn("couldn't close ouput"); 1191 1192 #ifndef SMALL 1193 if (stat(outfile, &osb) < 0) { 1194 maybe_warn("couldn't stat: %s", outfile); 1195 goto bad_outfile; 1196 } 1197 1198 if (osb.st_size != size) { 1199 maybe_warnx("output file: %s wrong size (%" PRIdOFF 1200 " != %" PRIdOFF "), deleting", 1201 outfile, osb.st_size, size); 1202 goto bad_outfile; 1203 } 1204 1205 copymodes(outfile, &isb); 1206 #endif 1207 1208 /* output is good, ok to delete input */ 1209 unlink_input(file, &isb); 1210 return size; 1211 1212 #ifndef SMALL 1213 bad_outfile: 1214 maybe_warnx("leaving original %s", file); 1215 unlink(outfile); 1216 return size; 1217 #endif 1218 } 1219 1220 /* uncompress the given file and remove the original */ 1221 static off_t 1222 file_uncompress(char *file, char *outfile, size_t outsize) 1223 { 1224 struct stat isb, osb; 1225 off_t size; 1226 ssize_t rbytes; 1227 unsigned char header1[4]; 1228 enum filetype method; 1229 int fd, zfd = -1; 1230 #ifndef SMALL 1231 time_t timestamp = 0; 1232 unsigned char name[PATH_MAX + 1]; 1233 #endif 1234 1235 /* gather the old name info */ 1236 1237 fd = open(file, O_RDONLY); 1238 if (fd < 0) { 1239 maybe_warn("can't open %s", file); 1240 goto lose; 1241 } 1242 1243 strlcpy(outfile, file, outsize); 1244 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1245 maybe_warnx("%s: unknown suffix -- ignored", file); 1246 goto lose; 1247 } 1248 1249 rbytes = read(fd, header1, sizeof header1); 1250 if (rbytes != sizeof header1) { 1251 /* we don't want to fail here. */ 1252 #ifndef SMALL 1253 if (fflag) 1254 goto lose; 1255 #endif 1256 if (rbytes == -1) 1257 maybe_warn("can't read %s", file); 1258 else 1259 maybe_warnx("%s: unexpected end of file", file); 1260 goto lose; 1261 } 1262 1263 method = file_gettype(header1); 1264 1265 #ifndef SMALL 1266 if (fflag == 0 && method == FT_UNKNOWN) { 1267 maybe_warnx("%s: not in gzip format", file); 1268 goto lose; 1269 } 1270 1271 #endif 1272 1273 #ifndef SMALL 1274 if (method == FT_GZIP && Nflag) { 1275 unsigned char ts[4]; /* timestamp */ 1276 1277 if (pread(fd, ts, sizeof ts, GZIP_TIMESTAMP) != sizeof ts) { 1278 if (!fflag) 1279 maybe_warn("can't read %s", file); 1280 goto lose; 1281 } 1282 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0]; 1283 1284 if (header1[3] & ORIG_NAME) { 1285 rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME); 1286 if (rbytes < 0) { 1287 maybe_warn("can't read %s", file); 1288 goto lose; 1289 } 1290 if (name[0] != 0) { 1291 /* preserve original directory name */ 1292 char *dp = strrchr(file, '/'); 1293 if (dp == NULL) 1294 dp = file; 1295 else 1296 dp++; 1297 snprintf(outfile, outsize, "%.*s%.*s", 1298 (int) (dp - file), 1299 file, (int) rbytes, name); 1300 } 1301 } 1302 } 1303 #endif 1304 lseek(fd, 0, SEEK_SET); 1305 1306 if (cflag == 0 || lflag) { 1307 if (fstat(fd, &isb) != 0) 1308 goto lose; 1309 #ifndef SMALL 1310 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1311 maybe_warnx("%s has %d other links -- skipping", 1312 file, isb.st_nlink - 1); 1313 goto lose; 1314 } 1315 if (nflag == 0 && timestamp) 1316 isb.st_mtime = timestamp; 1317 if (check_outfile(outfile, &osb) == 0) 1318 goto lose; 1319 #endif 1320 } 1321 1322 if (cflag == 0 && lflag == 0) { 1323 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1324 if (zfd == STDOUT_FILENO) { 1325 /* We won't close STDOUT_FILENO later... */ 1326 zfd = dup(zfd); 1327 close(STDOUT_FILENO); 1328 } 1329 if (zfd == -1) { 1330 maybe_warn("can't open %s", outfile); 1331 goto lose; 1332 } 1333 } else 1334 zfd = STDOUT_FILENO; 1335 1336 #ifndef NO_BZIP2_SUPPORT 1337 if (method == FT_BZIP2) { 1338 1339 /* XXX */ 1340 if (lflag) { 1341 maybe_warnx("no -l with bzip2 files"); 1342 goto lose; 1343 } 1344 1345 size = unbzip2(fd, zfd, NULL, 0, NULL); 1346 } else 1347 #endif 1348 1349 #ifndef NO_COMPRESS_SUPPORT 1350 if (method == FT_Z) { 1351 FILE *in, *out; 1352 1353 /* XXX */ 1354 if (lflag) { 1355 maybe_warnx("no -l with Lempel-Ziv files"); 1356 goto lose; 1357 } 1358 1359 if ((in = zdopen(fd)) == NULL) { 1360 maybe_warn("zdopen for read: %s", file); 1361 goto lose; 1362 } 1363 1364 out = fdopen(dup(zfd), "w"); 1365 if (out == NULL) { 1366 maybe_warn("fdopen for write: %s", outfile); 1367 fclose(in); 1368 goto lose; 1369 } 1370 1371 size = zuncompress(in, out, NULL, 0, NULL); 1372 /* need to fclose() if ferror() is true... */ 1373 if (ferror(in) | fclose(in)) { 1374 maybe_warn("failed infile fclose"); 1375 unlink(outfile); 1376 (void)fclose(out); 1377 } 1378 if (fclose(out) != 0) { 1379 maybe_warn("failed outfile fclose"); 1380 unlink(outfile); 1381 goto lose; 1382 } 1383 } else 1384 #endif 1385 1386 #ifndef SMALL 1387 if (method == FT_UNKNOWN) { 1388 if (lflag) { 1389 maybe_warnx("no -l for unknown filetypes"); 1390 goto lose; 1391 } 1392 size = cat_fd(NULL, 0, NULL, fd); 1393 } else 1394 #endif 1395 { 1396 if (lflag) { 1397 print_list(fd, isb.st_size, outfile, isb.st_mtime); 1398 close(fd); 1399 return -1; /* XXX */ 1400 } 1401 1402 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1403 } 1404 1405 if (close(fd) != 0) 1406 maybe_warn("couldn't close input"); 1407 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1408 maybe_warn("couldn't close output"); 1409 1410 if (size == -1) { 1411 if (cflag == 0) 1412 unlink(outfile); 1413 maybe_warnx("%s: uncompress failed", file); 1414 return -1; 1415 } 1416 1417 /* if testing, or we uncompressed to stdout, this is all we need */ 1418 #ifndef SMALL 1419 if (tflag) 1420 return size; 1421 #endif 1422 /* if we are uncompressing to stdin, don't remove the file. */ 1423 if (cflag) 1424 return size; 1425 1426 /* 1427 * if we create a file... 1428 */ 1429 /* 1430 * if we can't stat the file don't remove the file. 1431 */ 1432 if (stat(outfile, &osb) < 0) { 1433 maybe_warn("couldn't stat (leaving original): %s", 1434 outfile); 1435 return -1; 1436 } 1437 if (osb.st_size != size) { 1438 maybe_warn("stat gave different size: %" PRIdOFF 1439 " != %" PRIdOFF " (leaving original)", 1440 size, osb.st_size); 1441 unlink(outfile); 1442 return -1; 1443 } 1444 unlink_input(file, &isb); 1445 #ifndef SMALL 1446 copymodes(outfile, &isb); 1447 #endif 1448 return size; 1449 1450 lose: 1451 if (fd != -1) 1452 close(fd); 1453 if (zfd != -1 && zfd != STDOUT_FILENO) 1454 close(fd); 1455 return -1; 1456 } 1457 1458 #ifndef SMALL 1459 static off_t 1460 cat_fd(unsigned char * prepend, ssize_t count, off_t *gsizep, int fd) 1461 { 1462 char buf[BUFLEN]; 1463 ssize_t rv; 1464 off_t in_tot; 1465 1466 in_tot = count; 1467 if (write(STDOUT_FILENO, prepend, count) != count) { 1468 maybe_warn("write to stdout"); 1469 return -1; 1470 } 1471 for (;;) { 1472 rv = read(fd, buf, sizeof buf); 1473 if (rv == 0) 1474 break; 1475 if (rv < 0) { 1476 maybe_warn("read from fd %d", fd); 1477 break; 1478 } 1479 1480 if (write(STDOUT_FILENO, buf, rv) != rv) { 1481 maybe_warn("write to stdout"); 1482 break; 1483 } 1484 in_tot += rv; 1485 } 1486 1487 if (gsizep) 1488 *gsizep = in_tot; 1489 return (in_tot); 1490 } 1491 #endif 1492 1493 static void 1494 handle_stdin(void) 1495 { 1496 unsigned char header1[4]; 1497 off_t usize, gsize; 1498 enum filetype method; 1499 #ifndef NO_COMPRESS_SUPPORT 1500 FILE *in; 1501 #endif 1502 1503 #ifndef SMALL 1504 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1505 maybe_warnx("standard input is a terminal -- ignoring"); 1506 return; 1507 } 1508 #endif 1509 1510 if (lflag) { 1511 struct stat isb; 1512 1513 /* XXX could read the whole file, etc. */ 1514 if (fstat(STDIN_FILENO, &isb) < 0) { 1515 maybe_warn("fstat"); 1516 return; 1517 } 1518 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime); 1519 return; 1520 } 1521 1522 if (read(STDIN_FILENO, header1, sizeof header1) != sizeof header1) { 1523 maybe_warn("can't read stdin"); 1524 return; 1525 } 1526 1527 method = file_gettype(header1); 1528 switch (method) { 1529 default: 1530 #ifndef SMALL 1531 if (fflag == 0) { 1532 maybe_warnx("unknown compression format"); 1533 return; 1534 } 1535 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO); 1536 break; 1537 #endif 1538 case FT_GZIP: 1539 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1540 header1, sizeof header1, &gsize, "(stdin)"); 1541 break; 1542 #ifndef NO_BZIP2_SUPPORT 1543 case FT_BZIP2: 1544 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1545 header1, sizeof header1, &gsize); 1546 break; 1547 #endif 1548 #ifndef NO_COMPRESS_SUPPORT 1549 case FT_Z: 1550 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1551 maybe_warnx("zopen of stdin"); 1552 return; 1553 } 1554 1555 usize = zuncompress(in, stdout, header1, sizeof header1, &gsize); 1556 fclose(in); 1557 break; 1558 #endif 1559 } 1560 1561 #ifndef SMALL 1562 if (vflag && !tflag && usize != -1 && gsize != -1) 1563 print_verbage(NULL, NULL, usize, gsize); 1564 #endif 1565 1566 } 1567 1568 static void 1569 handle_stdout(void) 1570 { 1571 off_t gsize, usize; 1572 1573 #ifndef SMALL 1574 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1575 maybe_warnx("standard output is a terminal -- ignoring"); 1576 return; 1577 } 1578 #endif 1579 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", 0); 1580 1581 #ifndef SMALL 1582 if (vflag && !tflag && usize != -1 && gsize != -1) 1583 print_verbage(NULL, NULL, usize, gsize); 1584 #endif 1585 } 1586 1587 /* do what is asked for, for the path name */ 1588 static void 1589 handle_pathname(char *path) 1590 { 1591 char *opath = path, *s = NULL; 1592 ssize_t len; 1593 int slen; 1594 struct stat sb; 1595 1596 /* check for stdout/stdin */ 1597 if (path[0] == '-' && path[1] == '\0') { 1598 if (dflag) 1599 handle_stdin(); 1600 else 1601 handle_stdout(); 1602 return; 1603 } 1604 1605 retry: 1606 if (stat(path, &sb) < 0) { 1607 /* lets try <path>.gz if we're decompressing */ 1608 if (dflag && s == NULL && errno == ENOENT) { 1609 len = strlen(path); 1610 slen = suffixes[0].ziplen; 1611 s = malloc(len + slen + 1); 1612 if (s == NULL) 1613 maybe_err("malloc"); 1614 memcpy(s, path, len); 1615 memcpy(s + len, suffixes[0].zipped, slen + 1); 1616 path = s; 1617 goto retry; 1618 } 1619 maybe_warn("can't stat: %s", opath); 1620 goto out; 1621 } 1622 1623 if (S_ISDIR(sb.st_mode)) { 1624 #ifndef SMALL 1625 if (rflag) 1626 handle_dir(path); 1627 else 1628 #endif 1629 maybe_warnx("%s is a directory", path); 1630 goto out; 1631 } 1632 1633 if (S_ISREG(sb.st_mode)) 1634 handle_file(path, &sb); 1635 else 1636 maybe_warnx("%s is not a regular file", path); 1637 1638 out: 1639 if (s) 1640 free(s); 1641 } 1642 1643 /* compress/decompress a file */ 1644 static void 1645 handle_file(char *file, struct stat *sbp) 1646 { 1647 off_t usize, gsize; 1648 char outfile[PATH_MAX]; 1649 1650 infile = file; 1651 if (dflag) { 1652 usize = file_uncompress(file, outfile, sizeof(outfile)); 1653 if (usize == -1) 1654 return; 1655 gsize = sbp->st_size; 1656 } else { 1657 gsize = file_compress(file, outfile, sizeof(outfile)); 1658 if (gsize == -1) 1659 return; 1660 usize = sbp->st_size; 1661 } 1662 1663 1664 #ifndef SMALL 1665 if (vflag && !tflag) 1666 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 1667 #endif 1668 } 1669 1670 #ifndef SMALL 1671 /* this is used with -r to recursively descend directories */ 1672 static void 1673 handle_dir(char *dir) 1674 { 1675 char *path_argv[2]; 1676 FTS *fts; 1677 FTSENT *entry; 1678 1679 path_argv[0] = dir; 1680 path_argv[1] = 0; 1681 fts = fts_open(path_argv, FTS_PHYSICAL, NULL); 1682 if (fts == NULL) { 1683 warn("couldn't fts_open %s", dir); 1684 return; 1685 } 1686 1687 while ((entry = fts_read(fts))) { 1688 switch(entry->fts_info) { 1689 case FTS_D: 1690 case FTS_DP: 1691 continue; 1692 1693 case FTS_DNR: 1694 case FTS_ERR: 1695 case FTS_NS: 1696 maybe_warn("%s", entry->fts_path); 1697 continue; 1698 case FTS_F: 1699 handle_file(entry->fts_name, entry->fts_statp); 1700 } 1701 } 1702 (void)fts_close(fts); 1703 } 1704 #endif 1705 1706 /* print a ratio - size reduction as a fraction of uncompressed size */ 1707 static void 1708 print_ratio(off_t in, off_t out, FILE *where) 1709 { 1710 int percent10; /* 10 * percent */ 1711 off_t diff; 1712 char buff[8]; 1713 int len; 1714 1715 diff = in - out/2; 1716 if (diff <= 0) 1717 /* 1718 * Output is more than double size of input! print -99.9% 1719 * Quite possibly we've failed to get the original size. 1720 */ 1721 percent10 = -999; 1722 else { 1723 /* 1724 * We only need 12 bits of result from the final division, 1725 * so reduce the values until a 32bit division will suffice. 1726 */ 1727 while (in > 0x100000) { 1728 diff >>= 1; 1729 in >>= 1; 1730 } 1731 if (in != 0) 1732 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 1733 else 1734 percent10 = 0; 1735 } 1736 1737 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 1738 /* Move the '.' to before the last digit */ 1739 buff[len - 1] = buff[len - 2]; 1740 buff[len - 2] = '.'; 1741 fprintf(where, "%5s%%", buff); 1742 } 1743 1744 #ifndef SMALL 1745 /* print compression statistics, and the new name (if there is one!) */ 1746 static void 1747 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 1748 { 1749 if (file) 1750 fprintf(stderr, "%s:%s ", file, 1751 strlen(file) < 7 ? "\t\t" : "\t"); 1752 print_ratio(usize, gsize, stderr); 1753 if (nfile) 1754 fprintf(stderr, " -- replaced with %s", nfile); 1755 fprintf(stderr, "\n"); 1756 fflush(stderr); 1757 } 1758 1759 /* print test results */ 1760 static void 1761 print_test(const char *file, int ok) 1762 { 1763 1764 if (exit_value == 0 && ok == 0) 1765 exit_value = 1; 1766 fprintf(stderr, "%s:%s %s\n", file, 1767 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 1768 fflush(stderr); 1769 } 1770 #endif 1771 1772 /* print a file's info ala --list */ 1773 /* eg: 1774 compressed uncompressed ratio uncompressed_name 1775 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 1776 */ 1777 static void 1778 print_list(int fd, off_t out, const char *outfile, time_t ts) 1779 { 1780 static int first = 1; 1781 #ifndef SMALL 1782 static off_t in_tot, out_tot; 1783 uint32_t crc = 0; 1784 #endif 1785 off_t in = 0; 1786 int rv; 1787 1788 if (first) { 1789 #ifndef SMALL 1790 if (vflag) 1791 printf("method crc date time "); 1792 #endif 1793 if (qflag == 0) 1794 printf(" compressed uncompressed " 1795 "ratio uncompressed_name\n"); 1796 } 1797 first = 0; 1798 1799 /* print totals? */ 1800 #ifndef SMALL 1801 if (fd == -1) { 1802 in = in_tot; 1803 out = out_tot; 1804 } else 1805 #endif 1806 { 1807 /* read the last 4 bytes - this is the uncompressed size */ 1808 rv = lseek(fd, (off_t)(-8), SEEK_END); 1809 if (rv != -1) { 1810 unsigned char buf[8]; 1811 uint32_t usize; 1812 1813 if (read(fd, (char *)buf, sizeof(buf)) != sizeof(buf)) 1814 maybe_warn("read of uncompressed size"); 1815 usize = buf[4] | buf[5] << 8 | buf[6] << 16 | buf[7] << 24; 1816 in = (off_t)usize; 1817 #ifndef SMALL 1818 crc = buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24; 1819 #endif 1820 } 1821 } 1822 1823 #ifndef SMALL 1824 if (vflag && fd == -1) 1825 printf(" "); 1826 else if (vflag) { 1827 char *date = ctime(&ts); 1828 1829 /* skip the day, 1/100th second, and year */ 1830 date += 4; 1831 date[12] = 0; 1832 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 1833 } 1834 in_tot += in; 1835 out_tot += out; 1836 #endif 1837 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 1838 print_ratio(in, out, stdout); 1839 printf(" %s\n", outfile); 1840 } 1841 1842 /* display the usage of NetBSD gzip */ 1843 static void 1844 usage(void) 1845 { 1846 1847 fprintf(stderr, "%s\n", gzip_version); 1848 fprintf(stderr, 1849 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n" 1850 #ifndef SMALL 1851 " -c --stdout write to stdout, keep original files\n" 1852 " --to-stdout\n" 1853 " -d --decompress uncompress files\n" 1854 " --uncompress\n" 1855 " -f --force force overwriting & compress links\n" 1856 " -h --help display this help\n" 1857 " -n --no-name don't save original file name or time stamp\n" 1858 " -N --name save or restore original file name and time stamp\n" 1859 " -q --quiet output no warnings\n" 1860 " -r --recursive recursively compress files in directories\n" 1861 " -S .suf use suffix .suf instead of .gz\n" 1862 " --suffix .suf\n" 1863 " -t --test test compressed file\n" 1864 " -v --verbose print extra statistics\n" 1865 " -V --version display program version\n" 1866 " -1 --fast fastest (worst) compression\n" 1867 " -2 .. -8 set compression level\n" 1868 " -9 --best best (slowest) compression\n", 1869 #else 1870 , 1871 #endif 1872 getprogname()); 1873 exit(0); 1874 } 1875 1876 /* display the version of NetBSD gzip */ 1877 static void 1878 display_version(void) 1879 { 1880 1881 fprintf(stderr, "%s\n", gzip_version); 1882 exit(0); 1883 } 1884 1885 #ifndef NO_BZIP2_SUPPORT 1886 #include "unbzip2.c" 1887 #endif 1888 #ifndef NO_COMPRESS_SUPPORT 1889 #include "zuncompress.c" 1890 #endif 1891