1 /* $NetBSD: gzip.c,v 1.72 2005/06/02 01:51:58 lukem 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 1.72 2005/06/02 01:51:58 lukem 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 static ssize_t read_retry(int, void *, size_t); 197 198 #ifdef SMALL 199 #define unlink_input(f, sb) unlink(f) 200 #else 201 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd); 202 static void prepend_gzip(char *, int *, char ***); 203 static void handle_dir(char *, struct stat *); 204 static void print_verbage(const char *, const char *, off_t, off_t); 205 static void print_test(const char *, int); 206 static void copymodes(const char *, struct stat *); 207 static int check_outfile(const char *outfile, struct stat *sb); 208 #endif 209 210 #ifndef NO_BZIP2_SUPPORT 211 static off_t unbzip2(int, int, char *, size_t, off_t *); 212 #endif 213 214 #ifndef NO_COMPRESS_SUPPORT 215 static FILE *zdopen(int); 216 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *); 217 #endif 218 219 int main(int, char *p[]); 220 221 #ifdef SMALL 222 #define getopt_long(a,b,c,d,e) getopt(a,b,c) 223 #else 224 static const struct option longopts[] = { 225 { "stdout", no_argument, 0, 'c' }, 226 { "to-stdout", no_argument, 0, 'c' }, 227 { "decompress", no_argument, 0, 'd' }, 228 { "uncompress", no_argument, 0, 'd' }, 229 { "force", no_argument, 0, 'f' }, 230 { "help", no_argument, 0, 'h' }, 231 { "list", no_argument, 0, 'l' }, 232 { "no-name", no_argument, 0, 'n' }, 233 { "name", no_argument, 0, 'N' }, 234 { "quiet", no_argument, 0, 'q' }, 235 { "recursive", no_argument, 0, 'r' }, 236 { "suffix", required_argument, 0, 'S' }, 237 { "test", no_argument, 0, 't' }, 238 { "verbose", no_argument, 0, 'v' }, 239 { "version", no_argument, 0, 'V' }, 240 { "fast", no_argument, 0, '1' }, 241 { "best", no_argument, 0, '9' }, 242 #if 0 243 /* 244 * This is what else GNU gzip implements. --ascii isn't useful 245 * on NetBSD, and I don't care to have a --license. 246 */ 247 { "ascii", no_argument, 0, 'a' }, 248 { "license", no_argument, 0, 'L' }, 249 #endif 250 { NULL, no_argument, 0, 0 }, 251 }; 252 #endif 253 254 int 255 main(int argc, char **argv) 256 { 257 const char *progname = getprogname(); 258 #ifndef SMALL 259 char *gzip; 260 int len; 261 #endif 262 int ch; 263 264 /* XXX set up signals */ 265 266 #ifndef SMALL 267 if ((gzip = getenv("GZIP")) != NULL) 268 prepend_gzip(gzip, &argc, &argv); 269 #endif 270 271 /* 272 * XXX 273 * handle being called `gunzip', `zcat' and `gzcat' 274 */ 275 if (strcmp(progname, "gunzip") == 0) 276 dflag = 1; 277 else if (strcmp(progname, "zcat") == 0 || 278 strcmp(progname, "gzcat") == 0) 279 dflag = cflag = 1; 280 281 #ifdef SMALL 282 #define OPT_LIST "cdhHltV123456789" 283 #else 284 #define OPT_LIST "cdfhHlnNqrS:tvV123456789" 285 #endif 286 287 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) { 288 switch (ch) { 289 case 'c': 290 cflag = 1; 291 break; 292 case 'd': 293 dflag = 1; 294 break; 295 case 'l': 296 lflag = 1; 297 dflag = 1; 298 break; 299 case 'V': 300 display_version(); 301 /* NOTREACHED */ 302 case '1': case '2': case '3': 303 case '4': case '5': case '6': 304 case '7': case '8': case '9': 305 numflag = ch - '0'; 306 break; 307 #ifndef SMALL 308 case 'f': 309 fflag = 1; 310 break; 311 case 'n': 312 nflag = 1; 313 Nflag = 0; 314 break; 315 case 'N': 316 nflag = 0; 317 Nflag = 1; 318 break; 319 case 'q': 320 qflag = 1; 321 break; 322 case 'r': 323 rflag = 1; 324 break; 325 case 'S': 326 len = strlen(optarg); 327 if (len != 0) { 328 suffixes[0].zipped = optarg; 329 suffixes[0].ziplen = len; 330 } else { 331 suffixes[NUM_SUFFIXES - 1].zipped = ""; 332 suffixes[NUM_SUFFIXES - 1].ziplen = 0; 333 } 334 break; 335 case 't': 336 cflag = 1; 337 tflag = 1; 338 dflag = 1; 339 break; 340 case 'v': 341 vflag = 1; 342 break; 343 #endif 344 default: 345 usage(); 346 /* NOTREACHED */ 347 } 348 } 349 argv += optind; 350 argc -= optind; 351 352 if (argc == 0) { 353 if (dflag) /* stdin mode */ 354 handle_stdin(); 355 else /* stdout mode */ 356 handle_stdout(); 357 } else { 358 do { 359 handle_pathname(argv[0]); 360 } while (*++argv); 361 } 362 #ifndef SMALL 363 if (qflag == 0 && lflag && argc > 1) 364 print_list(-1, 0, "(totals)", 0); 365 #endif 366 exit(exit_value); 367 } 368 369 /* maybe print a warning */ 370 void 371 maybe_warn(const char *fmt, ...) 372 { 373 va_list ap; 374 375 if (qflag == 0) { 376 va_start(ap, fmt); 377 vwarn(fmt, ap); 378 va_end(ap); 379 } 380 if (exit_value == 0) 381 exit_value = 1; 382 } 383 384 /* ... without an errno. */ 385 void 386 maybe_warnx(const char *fmt, ...) 387 { 388 va_list ap; 389 390 if (qflag == 0) { 391 va_start(ap, fmt); 392 vwarnx(fmt, ap); 393 va_end(ap); 394 } 395 if (exit_value == 0) 396 exit_value = 1; 397 } 398 399 /* maybe print an error */ 400 void 401 maybe_err(const char *fmt, ...) 402 { 403 va_list ap; 404 405 if (qflag == 0) { 406 va_start(ap, fmt); 407 vwarn(fmt, ap); 408 va_end(ap); 409 } 410 exit(2); 411 } 412 413 #ifndef NO_BZIP2_SUPPORT 414 /* ... without an errno. */ 415 void 416 maybe_errx(const char *fmt, ...) 417 { 418 va_list ap; 419 420 if (qflag == 0) { 421 va_start(ap, fmt); 422 vwarnx(fmt, ap); 423 va_end(ap); 424 } 425 exit(2); 426 } 427 #endif 428 429 #ifndef SMALL 430 /* split up $GZIP and prepend it to the argument list */ 431 static void 432 prepend_gzip(char *gzip, int *argc, char ***argv) 433 { 434 char *s, **nargv, **ac; 435 int nenvarg = 0, i; 436 437 /* scan how many arguments there are */ 438 for (s = gzip;;) { 439 while (*s == ' ' || *s == '\t') 440 s++; 441 if (*s == 0) 442 goto count_done; 443 nenvarg++; 444 while (*s != ' ' && *s != '\t') 445 if (*s++ == 0) 446 goto count_done; 447 } 448 count_done: 449 /* punt early */ 450 if (nenvarg == 0) 451 return; 452 453 *argc += nenvarg; 454 ac = *argv; 455 456 nargv = (char **)malloc((*argc + 1) * sizeof(char *)); 457 if (nargv == NULL) 458 maybe_err("malloc"); 459 460 /* stash this away */ 461 *argv = nargv; 462 463 /* copy the program name first */ 464 i = 0; 465 nargv[i++] = *(ac++); 466 467 /* take a copy of $GZIP and add it to the array */ 468 s = strdup(gzip); 469 if (s == NULL) 470 maybe_err("strdup"); 471 for (;;) { 472 /* Skip whitespaces. */ 473 while (*s == ' ' || *s == '\t') 474 s++; 475 if (*s == 0) 476 goto copy_done; 477 nargv[i++] = s; 478 /* Find the end of this argument. */ 479 while (*s != ' ' && *s != '\t') 480 if (*s++ == 0) 481 /* Argument followed by NUL. */ 482 goto copy_done; 483 /* Terminate by overwriting ' ' or '\t' with NUL. */ 484 *s++ = 0; 485 } 486 copy_done: 487 488 /* copy the original arguments and a NULL */ 489 while (*ac) 490 nargv[i++] = *(ac++); 491 nargv[i] = NULL; 492 } 493 #endif 494 495 /* compress input to output. Return bytes read, -1 on error */ 496 static off_t 497 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime) 498 { 499 z_stream z; 500 char *outbufp, *inbufp; 501 off_t in_tot = 0, out_tot = 0; 502 ssize_t in_size; 503 int i, error; 504 uLong crc; 505 #ifdef SMALL 506 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0, 507 0, 0, 0, 0, 508 0, OS_CODE }; 509 #endif 510 511 outbufp = malloc(BUFLEN); 512 inbufp = malloc(BUFLEN); 513 if (outbufp == NULL || inbufp == NULL) { 514 maybe_err("malloc failed"); 515 goto out; 516 } 517 518 memset(&z, 0, sizeof z); 519 z.zalloc = Z_NULL; 520 z.zfree = Z_NULL; 521 z.opaque = 0; 522 523 #ifdef SMALL 524 memcpy(outbufp, header, sizeof header); 525 i = sizeof header; 526 #else 527 if (nflag != 0) { 528 mtime = 0; 529 origname = ""; 530 } 531 532 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s", 533 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 534 *origname ? ORIG_NAME : 0, 535 mtime & 0xff, 536 (mtime >> 8) & 0xff, 537 (mtime >> 16) & 0xff, 538 (mtime >> 24) & 0xff, 539 numflag == 1 ? 4 : numflag == 9 ? 2 : 0, 540 OS_CODE, origname); 541 if (i >= BUFLEN) 542 /* this need PATH_MAX > BUFLEN ... */ 543 maybe_err("snprintf"); 544 if (*origname) 545 i++; 546 #endif 547 548 z.next_out = outbufp + i; 549 z.avail_out = BUFLEN - i; 550 551 error = deflateInit2(&z, numflag, Z_DEFLATED, 552 -MAX_WBITS, 8, Z_DEFAULT_STRATEGY); 553 if (error != Z_OK) { 554 maybe_warnx("deflateInit2 failed"); 555 in_tot = -1; 556 goto out; 557 } 558 559 crc = crc32(0L, Z_NULL, 0); 560 for (;;) { 561 if (z.avail_out == 0) { 562 if (write(out, outbufp, BUFLEN) != BUFLEN) { 563 maybe_warn("write"); 564 in_tot = -1; 565 goto out; 566 } 567 568 out_tot += BUFLEN; 569 z.next_out = outbufp; 570 z.avail_out = BUFLEN; 571 } 572 573 if (z.avail_in == 0) { 574 in_size = read(in, inbufp, BUFLEN); 575 if (in_size < 0) { 576 maybe_warn("read"); 577 in_tot = -1; 578 goto out; 579 } 580 if (in_size == 0) 581 break; 582 583 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size); 584 in_tot += in_size; 585 z.next_in = inbufp; 586 z.avail_in = in_size; 587 } 588 589 error = deflate(&z, Z_NO_FLUSH); 590 if (error != Z_OK && error != Z_STREAM_END) { 591 maybe_warnx("deflate failed"); 592 in_tot = -1; 593 goto out; 594 } 595 } 596 597 /* clean up */ 598 for (;;) { 599 size_t len; 600 601 error = deflate(&z, Z_FINISH); 602 if (error != Z_OK && error != Z_STREAM_END) { 603 maybe_warnx("deflate failed"); 604 in_tot = -1; 605 goto out; 606 } 607 608 len = (char *)z.next_out - outbufp; 609 610 if (write(out, outbufp, len) != len) { 611 maybe_warn("write"); 612 out_tot = -1; 613 goto out; 614 } 615 out_tot += len; 616 z.next_out = outbufp; 617 z.avail_out = BUFLEN; 618 619 if (error == Z_STREAM_END) 620 break; 621 } 622 623 if (deflateEnd(&z) != Z_OK) { 624 maybe_warnx("deflateEnd failed"); 625 in_tot = -1; 626 goto out; 627 } 628 629 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c", 630 (int)crc & 0xff, 631 (int)(crc >> 8) & 0xff, 632 (int)(crc >> 16) & 0xff, 633 (int)(crc >> 24) & 0xff, 634 (int)in_tot & 0xff, 635 (int)(in_tot >> 8) & 0xff, 636 (int)(in_tot >> 16) & 0xff, 637 (int)(in_tot >> 24) & 0xff); 638 if (i != 8) 639 maybe_err("snprintf"); 640 if (write(out, outbufp, i) != i) { 641 maybe_warn("write"); 642 in_tot = -1; 643 } else 644 out_tot += i; 645 646 out: 647 if (inbufp != NULL) 648 free(inbufp); 649 if (outbufp != NULL) 650 free(outbufp); 651 if (gsizep) 652 *gsizep = out_tot; 653 return in_tot; 654 } 655 656 /* 657 * uncompress input to output then close the input. return the 658 * uncompressed size written, and put the compressed sized read 659 * into `*gsizep'. 660 */ 661 static off_t 662 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep, 663 const char *filename) 664 { 665 z_stream z; 666 char *outbufp, *inbufp; 667 off_t out_tot = -1, in_tot = 0; 668 uint32_t out_sub_tot = 0; 669 enum { 670 GZSTATE_MAGIC0, 671 GZSTATE_MAGIC1, 672 GZSTATE_METHOD, 673 GZSTATE_FLAGS, 674 GZSTATE_SKIPPING, 675 GZSTATE_EXTRA, 676 GZSTATE_EXTRA2, 677 GZSTATE_EXTRA3, 678 GZSTATE_ORIGNAME, 679 GZSTATE_COMMENT, 680 GZSTATE_HEAD_CRC1, 681 GZSTATE_HEAD_CRC2, 682 GZSTATE_INIT, 683 GZSTATE_READ, 684 GZSTATE_CRC, 685 GZSTATE_LEN, 686 } state = GZSTATE_MAGIC0; 687 int flags = 0, skip_count = 0; 688 int error = Z_STREAM_ERROR, done_reading = 0; 689 uLong crc = 0; 690 ssize_t wr; 691 int needmore = 0; 692 693 #define ADVANCE() { z.next_in++; z.avail_in--; } 694 695 if ((outbufp = malloc(BUFLEN)) == NULL) { 696 maybe_err("malloc failed"); 697 goto out2; 698 } 699 if ((inbufp = malloc(BUFLEN)) == NULL) { 700 maybe_err("malloc failed"); 701 goto out1; 702 } 703 704 memset(&z, 0, sizeof z); 705 z.avail_in = prelen; 706 z.next_in = pre; 707 z.avail_out = BUFLEN; 708 z.next_out = outbufp; 709 z.zalloc = NULL; 710 z.zfree = NULL; 711 z.opaque = 0; 712 713 in_tot = prelen; 714 out_tot = 0; 715 716 for (;;) { 717 if ((z.avail_in == 0 || needmore) && done_reading == 0) { 718 size_t in_size; 719 720 if (z.avail_in > 0) { 721 memmove(inbufp, z.next_in, z.avail_in); 722 } 723 z.next_in = inbufp; 724 in_size = read(in, z.next_in + z.avail_in, 725 BUFLEN - z.avail_in); 726 727 if (in_size == -1) { 728 #ifndef SMALL 729 if (tflag && vflag) 730 print_test(filename, 0); 731 #endif 732 maybe_warn("failed to read stdin"); 733 out_tot = -1; 734 goto stop; 735 } else if (in_size == 0) { 736 done_reading = 1; 737 } 738 739 z.avail_in += in_size; 740 needmore = 0; 741 742 in_tot += in_size; 743 } 744 if (z.avail_in == 0) { 745 if (done_reading && state != GZSTATE_MAGIC0) 746 maybe_warnx("%s: unexpected end of file", 747 filename); 748 goto stop; 749 } 750 switch (state) { 751 case GZSTATE_MAGIC0: 752 if (*z.next_in != GZIP_MAGIC0) { 753 maybe_warnx("input not gziped (MAGIC0)"); 754 out_tot = -1; 755 goto stop; 756 } 757 ADVANCE(); 758 state++; 759 out_sub_tot = 0; 760 crc = crc32(0L, Z_NULL, 0); 761 break; 762 763 case GZSTATE_MAGIC1: 764 if (*z.next_in != GZIP_MAGIC1 && 765 *z.next_in != GZIP_OMAGIC1) { 766 maybe_warnx("input not gziped (MAGIC1)"); 767 out_tot = -1; 768 goto stop; 769 } 770 ADVANCE(); 771 state++; 772 break; 773 774 case GZSTATE_METHOD: 775 if (*z.next_in != Z_DEFLATED) { 776 maybe_warnx("unknown compression method"); 777 out_tot = -1; 778 goto stop; 779 } 780 ADVANCE(); 781 state++; 782 break; 783 784 case GZSTATE_FLAGS: 785 flags = *z.next_in; 786 ADVANCE(); 787 skip_count = 6; 788 state++; 789 break; 790 791 case GZSTATE_SKIPPING: 792 if (skip_count > 0) { 793 skip_count--; 794 ADVANCE(); 795 } else 796 state++; 797 break; 798 799 case GZSTATE_EXTRA: 800 if ((flags & EXTRA_FIELD) == 0) { 801 state = GZSTATE_ORIGNAME; 802 break; 803 } 804 skip_count = *z.next_in; 805 ADVANCE(); 806 state++; 807 break; 808 809 case GZSTATE_EXTRA2: 810 skip_count |= ((*z.next_in) << 8); 811 ADVANCE(); 812 state++; 813 break; 814 815 case GZSTATE_EXTRA3: 816 if (skip_count > 0) { 817 skip_count--; 818 ADVANCE(); 819 } else 820 state++; 821 break; 822 823 case GZSTATE_ORIGNAME: 824 if ((flags & ORIG_NAME) == 0) { 825 state++; 826 break; 827 } 828 if (*z.next_in == 0) 829 state++; 830 ADVANCE(); 831 break; 832 833 case GZSTATE_COMMENT: 834 if ((flags & COMMENT) == 0) { 835 state++; 836 break; 837 } 838 if (*z.next_in == 0) 839 state++; 840 ADVANCE(); 841 break; 842 843 case GZSTATE_HEAD_CRC1: 844 if (flags & HEAD_CRC) 845 skip_count = 2; 846 else 847 skip_count = 0; 848 state++; 849 break; 850 851 case GZSTATE_HEAD_CRC2: 852 if (skip_count > 0) { 853 skip_count--; 854 ADVANCE(); 855 } else 856 state++; 857 break; 858 859 case GZSTATE_INIT: 860 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) { 861 maybe_warnx("failed to inflateInit"); 862 out_tot = -1; 863 goto stop; 864 } 865 state++; 866 break; 867 868 case GZSTATE_READ: 869 error = inflate(&z, Z_FINISH); 870 /* Z_BUF_ERROR goes with Z_FINISH... */ 871 if (error != Z_STREAM_END && error != Z_BUF_ERROR) 872 /* Just need more input */ 873 break; 874 wr = BUFLEN - z.avail_out; 875 876 if (wr != 0) { 877 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 878 if ( 879 #ifndef SMALL 880 /* don't write anything with -t */ 881 tflag == 0 && 882 #endif 883 write(out, outbufp, wr) != wr) { 884 maybe_warn("error writing to output"); 885 out_tot = -1; 886 goto stop; 887 } 888 889 out_tot += wr; 890 out_sub_tot += wr; 891 } 892 893 if (error == Z_STREAM_END) { 894 inflateEnd(&z); 895 state++; 896 } 897 898 z.next_out = outbufp; 899 z.avail_out = BUFLEN; 900 901 break; 902 case GZSTATE_CRC: 903 { 904 uLong origcrc; 905 906 if (z.avail_in < 4) { 907 if (!done_reading) { 908 needmore = 1; 909 continue; 910 } 911 maybe_warnx("truncated input"); 912 out_tot = -1; 913 goto stop; 914 } 915 origcrc = ((unsigned)z.next_in[0] & 0xff) | 916 ((unsigned)z.next_in[1] & 0xff) << 8 | 917 ((unsigned)z.next_in[2] & 0xff) << 16 | 918 ((unsigned)z.next_in[3] & 0xff) << 24; 919 if (origcrc != crc) { 920 maybe_warnx("invalid compressed" 921 " data--crc error"); 922 out_tot = -1; 923 goto stop; 924 } 925 } 926 927 z.avail_in -= 4; 928 z.next_in += 4; 929 930 if (!z.avail_in && done_reading) { 931 goto stop; 932 } 933 state++; 934 break; 935 case GZSTATE_LEN: 936 { 937 uLong origlen; 938 939 if (z.avail_in < 4) { 940 if (!done_reading) { 941 needmore = 1; 942 continue; 943 } 944 maybe_warnx("truncated input"); 945 out_tot = -1; 946 goto stop; 947 } 948 origlen = ((unsigned)z.next_in[0] & 0xff) | 949 ((unsigned)z.next_in[1] & 0xff) << 8 | 950 ((unsigned)z.next_in[2] & 0xff) << 16 | 951 ((unsigned)z.next_in[3] & 0xff) << 24; 952 953 if (origlen != out_sub_tot) { 954 maybe_warnx("invalid compressed" 955 " data--length error"); 956 out_tot = -1; 957 goto stop; 958 } 959 } 960 961 z.avail_in -= 4; 962 z.next_in += 4; 963 964 if (error < 0) { 965 maybe_warnx("decompression error"); 966 out_tot = -1; 967 goto stop; 968 } 969 state = GZSTATE_MAGIC0; 970 break; 971 } 972 continue; 973 stop: 974 break; 975 } 976 if (state > GZSTATE_INIT) 977 inflateEnd(&z); 978 979 #ifndef SMALL 980 if (tflag && vflag) 981 print_test(filename, out_tot != -1); 982 #endif 983 984 free(inbufp); 985 out1: 986 free(outbufp); 987 out2: 988 if (gsizep) 989 *gsizep = in_tot; 990 return (out_tot); 991 } 992 993 #ifndef SMALL 994 /* 995 * set the owner, mode, flags & utimes for a file 996 */ 997 static void 998 copymodes(const char *file, struct stat *sbp) 999 { 1000 struct timeval times[2]; 1001 1002 /* 1003 * If we have no info on the input, give this file some 1004 * default values and return.. 1005 */ 1006 if (sbp == NULL) { 1007 mode_t mask = umask(022); 1008 1009 (void)chmod(file, DEFFILEMODE & ~mask); 1010 (void)umask(mask); 1011 return; 1012 } 1013 1014 /* if the chown fails, remove set-id bits as-per compress(1) */ 1015 if (chown(file, sbp->st_uid, sbp->st_gid) < 0) { 1016 if (errno != EPERM) 1017 maybe_warn("couldn't chown: %s", file); 1018 sbp->st_mode &= ~(S_ISUID|S_ISGID); 1019 } 1020 1021 /* we only allow set-id and the 9 normal permission bits */ 1022 sbp->st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1023 if (chmod(file, sbp->st_mode) < 0) 1024 maybe_warn("couldn't chmod: %s", file); 1025 1026 /* only try flags if they exist already */ 1027 if (sbp->st_flags != 0 && chflags(file, sbp->st_flags) < 0) 1028 maybe_warn("couldn't chflags: %s", file); 1029 1030 TIMESPEC_TO_TIMEVAL(×[0], &sbp->st_atimespec); 1031 TIMESPEC_TO_TIMEVAL(×[1], &sbp->st_mtimespec); 1032 if (utimes(file, times) < 0) 1033 maybe_warn("couldn't utimes: %s", file); 1034 } 1035 #endif 1036 1037 /* what sort of file is this? */ 1038 static enum filetype 1039 file_gettype(u_char *buf) 1040 { 1041 1042 if (buf[0] == GZIP_MAGIC0 && 1043 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1044 return FT_GZIP; 1045 else 1046 #ifndef NO_BZIP2_SUPPORT 1047 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1048 buf[3] >= '0' && buf[3] <= '9') 1049 return FT_BZIP2; 1050 else 1051 #endif 1052 #ifndef NO_COMPRESS_SUPPORT 1053 if (memcmp(buf, Z_MAGIC, 2) == 0) 1054 return FT_Z; 1055 else 1056 #endif 1057 return FT_UNKNOWN; 1058 } 1059 1060 #ifndef SMALL 1061 /* check the outfile is OK. */ 1062 static int 1063 check_outfile(const char *outfile, struct stat *sb) 1064 { 1065 int ok = 1; 1066 1067 if (lflag == 0 && stat(outfile, sb) == 0) { 1068 if (fflag) 1069 unlink(outfile); 1070 else if (isatty(STDIN_FILENO)) { 1071 char ans[10] = { 'n', '\0' }; /* default */ 1072 1073 fprintf(stderr, "%s already exists -- do you wish to " 1074 "overwrite (y or n)? " , outfile); 1075 (void)fgets(ans, sizeof(ans) - 1, stdin); 1076 if (ans[0] != 'y' && ans[0] != 'Y') { 1077 fprintf(stderr, "\tnot overwritting\n"); 1078 ok = 0; 1079 } else 1080 unlink(outfile); 1081 } else { 1082 maybe_warnx("%s already exists -- skipping", outfile); 1083 ok = 0; 1084 } 1085 } 1086 return ok; 1087 } 1088 1089 static void 1090 unlink_input(const char *file, struct stat *sb) 1091 { 1092 struct stat nsb; 1093 1094 if (stat(file, &nsb) != 0) 1095 /* Must be gone alrady */ 1096 return; 1097 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1098 /* Definitely a different file */ 1099 return; 1100 unlink(file); 1101 } 1102 #endif 1103 1104 static const suffixes_t * 1105 check_suffix(char *file, int xlate) 1106 { 1107 const suffixes_t *s; 1108 int len = strlen(file); 1109 char *sp; 1110 1111 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1112 /* if it doesn't fit in "a.suf", don't bother */ 1113 if (s->ziplen >= len) 1114 continue; 1115 sp = file + len - s->ziplen; 1116 if (strcmp(s->zipped, sp) != 0) 1117 continue; 1118 if (xlate) 1119 strcpy(sp, s->normal); 1120 return s; 1121 } 1122 return NULL; 1123 } 1124 1125 /* 1126 * compress the given file: create a corresponding .gz file and remove the 1127 * original. 1128 */ 1129 static off_t 1130 file_compress(char *file, char *outfile, size_t outsize) 1131 { 1132 int in; 1133 int out; 1134 off_t size, insize; 1135 #ifndef SMALL 1136 struct stat isb, osb; 1137 const suffixes_t *suff; 1138 #endif 1139 1140 in = open(file, O_RDONLY); 1141 if (in == -1) { 1142 maybe_warn("can't open %s", file); 1143 return -1; 1144 } 1145 1146 if (cflag == 0) { 1147 #ifndef SMALL 1148 if (stat(file, &isb) == 0) { 1149 if (isb.st_nlink > 1 && fflag == 0) { 1150 maybe_warnx("%s has %d other link%s -- " 1151 "skipping", file, isb.st_nlink - 1, 1152 isb.st_nlink == 1 ? "" : "s"); 1153 close(in); 1154 return -1; 1155 } 1156 } 1157 1158 if (fflag == 0 && (suff = check_suffix(file, 0)) 1159 && suff->zipped[0] != 0) { 1160 maybe_warnx("%s already has %s suffix -- unchanged", 1161 file, suff->zipped); 1162 close(in); 1163 return -1; 1164 } 1165 #endif 1166 1167 /* Add (usually) .gz to filename */ 1168 if (snprintf(outfile, outsize, "%s%s", 1169 file, suffixes[0].zipped) >= outsize) 1170 memcpy(outfile - suffixes[0].ziplen - 1, 1171 suffixes[0].zipped, suffixes[0].ziplen + 1); 1172 1173 #ifndef SMALL 1174 if (check_outfile(outfile, &osb) == 0) { 1175 close(in); 1176 return -1; 1177 } 1178 #endif 1179 } 1180 1181 if (cflag == 0) { 1182 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600); 1183 if (out == -1) { 1184 maybe_warn("could not create output: %s", outfile); 1185 fclose(stdin); 1186 return -1; 1187 } 1188 } else 1189 out = STDOUT_FILENO; 1190 1191 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1192 1193 (void)close(in); 1194 1195 /* 1196 * If there was an error, insize will be -1. 1197 * If we compressed to stdout, just return the size. 1198 * Otherwise stat the file and check it is the correct size. 1199 * We only blow away the file if we can stat the output and it 1200 * has the expected size. 1201 */ 1202 if (cflag != 0) 1203 return insize == -1 ? -1 : size; 1204 1205 if (close(out) == -1) 1206 maybe_warn("couldn't close ouput"); 1207 1208 #ifndef SMALL 1209 if (stat(outfile, &osb) < 0) { 1210 maybe_warn("couldn't stat: %s", outfile); 1211 goto bad_outfile; 1212 } 1213 1214 if (osb.st_size != size) { 1215 maybe_warnx("output file: %s wrong size (%" PRIdOFF 1216 " != %" PRIdOFF "), deleting", 1217 outfile, osb.st_size, size); 1218 goto bad_outfile; 1219 } 1220 1221 copymodes(outfile, &isb); 1222 #endif 1223 1224 /* output is good, ok to delete input */ 1225 unlink_input(file, &isb); 1226 return size; 1227 1228 #ifndef SMALL 1229 bad_outfile: 1230 maybe_warnx("leaving original %s", file); 1231 unlink(outfile); 1232 return size; 1233 #endif 1234 } 1235 1236 /* uncompress the given file and remove the original */ 1237 static off_t 1238 file_uncompress(char *file, char *outfile, size_t outsize) 1239 { 1240 struct stat isb, osb; 1241 off_t size; 1242 ssize_t rbytes; 1243 unsigned char header1[4]; 1244 enum filetype method; 1245 int fd, zfd = -1; 1246 #ifndef SMALL 1247 time_t timestamp = 0; 1248 unsigned char name[PATH_MAX + 1]; 1249 #endif 1250 1251 /* gather the old name info */ 1252 1253 fd = open(file, O_RDONLY); 1254 if (fd < 0) { 1255 maybe_warn("can't open %s", file); 1256 goto lose; 1257 } 1258 1259 strlcpy(outfile, file, outsize); 1260 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1261 maybe_warnx("%s: unknown suffix -- ignored", file); 1262 goto lose; 1263 } 1264 1265 rbytes = read(fd, header1, sizeof header1); 1266 if (rbytes != sizeof header1) { 1267 /* we don't want to fail here. */ 1268 #ifndef SMALL 1269 if (fflag) 1270 goto lose; 1271 #endif 1272 if (rbytes == -1) 1273 maybe_warn("can't read %s", file); 1274 else 1275 maybe_warnx("%s: unexpected end of file", file); 1276 goto lose; 1277 } 1278 1279 method = file_gettype(header1); 1280 1281 #ifndef SMALL 1282 if (fflag == 0 && method == FT_UNKNOWN) { 1283 maybe_warnx("%s: not in gzip format", file); 1284 goto lose; 1285 } 1286 1287 #endif 1288 1289 #ifndef SMALL 1290 if (method == FT_GZIP && Nflag) { 1291 unsigned char ts[4]; /* timestamp */ 1292 1293 if (pread(fd, ts, sizeof ts, GZIP_TIMESTAMP) != sizeof ts) { 1294 if (!fflag) 1295 maybe_warn("can't read %s", file); 1296 goto lose; 1297 } 1298 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0]; 1299 1300 if (header1[3] & ORIG_NAME) { 1301 rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME); 1302 if (rbytes < 0) { 1303 maybe_warn("can't read %s", file); 1304 goto lose; 1305 } 1306 if (name[0] != 0) { 1307 /* preserve original directory name */ 1308 char *dp = strrchr(file, '/'); 1309 if (dp == NULL) 1310 dp = file; 1311 else 1312 dp++; 1313 snprintf(outfile, outsize, "%.*s%.*s", 1314 (int) (dp - file), 1315 file, (int) rbytes, name); 1316 } 1317 } 1318 } 1319 #endif 1320 lseek(fd, 0, SEEK_SET); 1321 1322 if (cflag == 0 || lflag) { 1323 if (fstat(fd, &isb) != 0) 1324 goto lose; 1325 #ifndef SMALL 1326 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1327 maybe_warnx("%s has %d other links -- skipping", 1328 file, isb.st_nlink - 1); 1329 goto lose; 1330 } 1331 if (nflag == 0 && timestamp) 1332 isb.st_mtime = timestamp; 1333 if (check_outfile(outfile, &osb) == 0) 1334 goto lose; 1335 #endif 1336 } 1337 1338 if (cflag == 0 && lflag == 0) { 1339 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1340 if (zfd == STDOUT_FILENO) { 1341 /* We won't close STDOUT_FILENO later... */ 1342 zfd = dup(zfd); 1343 close(STDOUT_FILENO); 1344 } 1345 if (zfd == -1) { 1346 maybe_warn("can't open %s", outfile); 1347 goto lose; 1348 } 1349 } else 1350 zfd = STDOUT_FILENO; 1351 1352 #ifndef NO_BZIP2_SUPPORT 1353 if (method == FT_BZIP2) { 1354 1355 /* XXX */ 1356 if (lflag) { 1357 maybe_warnx("no -l with bzip2 files"); 1358 goto lose; 1359 } 1360 1361 size = unbzip2(fd, zfd, NULL, 0, NULL); 1362 } else 1363 #endif 1364 1365 #ifndef NO_COMPRESS_SUPPORT 1366 if (method == FT_Z) { 1367 FILE *in, *out; 1368 1369 /* XXX */ 1370 if (lflag) { 1371 maybe_warnx("no -l with Lempel-Ziv files"); 1372 goto lose; 1373 } 1374 1375 if ((in = zdopen(fd)) == NULL) { 1376 maybe_warn("zdopen for read: %s", file); 1377 goto lose; 1378 } 1379 1380 out = fdopen(dup(zfd), "w"); 1381 if (out == NULL) { 1382 maybe_warn("fdopen for write: %s", outfile); 1383 fclose(in); 1384 goto lose; 1385 } 1386 1387 size = zuncompress(in, out, NULL, 0, NULL); 1388 /* need to fclose() if ferror() is true... */ 1389 if (ferror(in) | fclose(in)) { 1390 maybe_warn("failed infile fclose"); 1391 unlink(outfile); 1392 (void)fclose(out); 1393 } 1394 if (fclose(out) != 0) { 1395 maybe_warn("failed outfile fclose"); 1396 unlink(outfile); 1397 goto lose; 1398 } 1399 } else 1400 #endif 1401 1402 #ifndef SMALL 1403 if (method == FT_UNKNOWN) { 1404 if (lflag) { 1405 maybe_warnx("no -l for unknown filetypes"); 1406 goto lose; 1407 } 1408 size = cat_fd(NULL, 0, NULL, fd); 1409 } else 1410 #endif 1411 { 1412 if (lflag) { 1413 print_list(fd, isb.st_size, outfile, isb.st_mtime); 1414 close(fd); 1415 return -1; /* XXX */ 1416 } 1417 1418 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1419 } 1420 1421 if (close(fd) != 0) 1422 maybe_warn("couldn't close input"); 1423 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1424 maybe_warn("couldn't close output"); 1425 1426 if (size == -1) { 1427 if (cflag == 0) 1428 unlink(outfile); 1429 maybe_warnx("%s: uncompress failed", file); 1430 return -1; 1431 } 1432 1433 /* if testing, or we uncompressed to stdout, this is all we need */ 1434 #ifndef SMALL 1435 if (tflag) 1436 return size; 1437 #endif 1438 /* if we are uncompressing to stdin, don't remove the file. */ 1439 if (cflag) 1440 return size; 1441 1442 /* 1443 * if we create a file... 1444 */ 1445 /* 1446 * if we can't stat the file don't remove the file. 1447 */ 1448 if (stat(outfile, &osb) < 0) { 1449 maybe_warn("couldn't stat (leaving original): %s", 1450 outfile); 1451 return -1; 1452 } 1453 if (osb.st_size != size) { 1454 maybe_warn("stat gave different size: %" PRIdOFF 1455 " != %" PRIdOFF " (leaving original)", 1456 size, osb.st_size); 1457 unlink(outfile); 1458 return -1; 1459 } 1460 unlink_input(file, &isb); 1461 #ifndef SMALL 1462 copymodes(outfile, &isb); 1463 #endif 1464 return size; 1465 1466 lose: 1467 if (fd != -1) 1468 close(fd); 1469 if (zfd != -1 && zfd != STDOUT_FILENO) 1470 close(fd); 1471 return -1; 1472 } 1473 1474 #ifndef SMALL 1475 static off_t 1476 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd) 1477 { 1478 char buf[BUFLEN]; 1479 size_t rv; 1480 off_t in_tot; 1481 1482 in_tot = count; 1483 if (write(STDOUT_FILENO, prepend, count) != count) { 1484 maybe_warn("write to stdout"); 1485 return -1; 1486 } 1487 for (;;) { 1488 rv = read(fd, buf, sizeof buf); 1489 if (rv == 0) 1490 break; 1491 if (rv < 0) { 1492 maybe_warn("read from fd %d", fd); 1493 break; 1494 } 1495 1496 if (write(STDOUT_FILENO, buf, rv) != rv) { 1497 maybe_warn("write to stdout"); 1498 break; 1499 } 1500 in_tot += rv; 1501 } 1502 1503 if (gsizep) 1504 *gsizep = in_tot; 1505 return (in_tot); 1506 } 1507 #endif 1508 1509 static void 1510 handle_stdin(void) 1511 { 1512 unsigned char header1[4]; 1513 off_t usize, gsize; 1514 enum filetype method; 1515 ssize_t bytes_read; 1516 #ifndef NO_COMPRESS_SUPPORT 1517 FILE *in; 1518 #endif 1519 1520 #ifndef SMALL 1521 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1522 maybe_warnx("standard input is a terminal -- ignoring"); 1523 return; 1524 } 1525 #endif 1526 1527 if (lflag) { 1528 struct stat isb; 1529 1530 /* XXX could read the whole file, etc. */ 1531 if (fstat(STDIN_FILENO, &isb) < 0) { 1532 maybe_warn("fstat"); 1533 return; 1534 } 1535 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime); 1536 return; 1537 } 1538 1539 bytes_read = read_retry(STDIN_FILENO, header1, sizeof header1); 1540 if (bytes_read == -1) { 1541 maybe_warn("can't read stdin"); 1542 return; 1543 } else if (bytes_read != sizeof(header1)) { 1544 maybe_warnx("unexpected EOF"); 1545 return; 1546 } 1547 1548 method = file_gettype(header1); 1549 switch (method) { 1550 default: 1551 #ifndef SMALL 1552 if (fflag == 0) { 1553 maybe_warnx("unknown compression format"); 1554 return; 1555 } 1556 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO); 1557 break; 1558 #endif 1559 case FT_GZIP: 1560 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1561 header1, sizeof header1, &gsize, "(stdin)"); 1562 break; 1563 #ifndef NO_BZIP2_SUPPORT 1564 case FT_BZIP2: 1565 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1566 header1, sizeof header1, &gsize); 1567 break; 1568 #endif 1569 #ifndef NO_COMPRESS_SUPPORT 1570 case FT_Z: 1571 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1572 maybe_warnx("zopen of stdin"); 1573 return; 1574 } 1575 1576 usize = zuncompress(in, stdout, header1, sizeof header1, &gsize); 1577 fclose(in); 1578 break; 1579 #endif 1580 } 1581 1582 #ifndef SMALL 1583 if (vflag && !tflag && usize != -1 && gsize != -1) 1584 print_verbage(NULL, NULL, usize, gsize); 1585 #endif 1586 1587 } 1588 1589 static void 1590 handle_stdout(void) 1591 { 1592 off_t gsize, usize; 1593 struct stat sb; 1594 time_t systime; 1595 uint32_t mtime; 1596 int ret; 1597 1598 #ifndef SMALL 1599 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1600 maybe_warnx("standard output is a terminal -- ignoring"); 1601 return; 1602 } 1603 #endif 1604 /* If stdin is a file use it's mtime, otherwise use current time */ 1605 ret = fstat(STDIN_FILENO, &sb); 1606 1607 #ifndef SMALL 1608 if (ret < 0) { 1609 maybe_warn("Can't stat stdin"); 1610 return; 1611 } 1612 #endif 1613 1614 if (S_ISREG(sb.st_mode)) 1615 mtime = (uint32_t)sb.st_mtime; 1616 else { 1617 systime = time(NULL); 1618 #ifndef SMALL 1619 if (systime == -1) { 1620 maybe_warn("time"); 1621 return; 1622 } 1623 #endif 1624 mtime = (uint32_t)systime; 1625 } 1626 1627 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime); 1628 #ifndef SMALL 1629 if (vflag && !tflag && usize != -1 && gsize != -1) 1630 print_verbage(NULL, NULL, usize, gsize); 1631 #endif 1632 } 1633 1634 /* do what is asked for, for the path name */ 1635 static void 1636 handle_pathname(char *path) 1637 { 1638 char *opath = path, *s = NULL; 1639 ssize_t len; 1640 int slen; 1641 struct stat sb; 1642 1643 /* check for stdout/stdin */ 1644 if (path[0] == '-' && path[1] == '\0') { 1645 if (dflag) 1646 handle_stdin(); 1647 else 1648 handle_stdout(); 1649 return; 1650 } 1651 1652 retry: 1653 if (stat(path, &sb) < 0) { 1654 /* lets try <path>.gz if we're decompressing */ 1655 if (dflag && s == NULL && errno == ENOENT) { 1656 len = strlen(path); 1657 slen = suffixes[0].ziplen; 1658 s = malloc(len + slen + 1); 1659 if (s == NULL) 1660 maybe_err("malloc"); 1661 memcpy(s, path, len); 1662 memcpy(s + len, suffixes[0].zipped, slen + 1); 1663 path = s; 1664 goto retry; 1665 } 1666 maybe_warn("can't stat: %s", opath); 1667 goto out; 1668 } 1669 1670 if (S_ISDIR(sb.st_mode)) { 1671 #ifndef SMALL 1672 if (rflag) 1673 handle_dir(path, &sb); 1674 else 1675 #endif 1676 maybe_warnx("%s is a directory", path); 1677 goto out; 1678 } 1679 1680 if (S_ISREG(sb.st_mode)) 1681 handle_file(path, &sb); 1682 else 1683 maybe_warnx("%s is not a regular file", path); 1684 1685 out: 1686 if (s) 1687 free(s); 1688 } 1689 1690 /* compress/decompress a file */ 1691 static void 1692 handle_file(char *file, struct stat *sbp) 1693 { 1694 off_t usize, gsize; 1695 char outfile[PATH_MAX]; 1696 1697 infile = file; 1698 if (dflag) { 1699 usize = file_uncompress(file, outfile, sizeof(outfile)); 1700 if (usize == -1) 1701 return; 1702 gsize = sbp->st_size; 1703 } else { 1704 gsize = file_compress(file, outfile, sizeof(outfile)); 1705 if (gsize == -1) 1706 return; 1707 usize = sbp->st_size; 1708 } 1709 1710 1711 #ifndef SMALL 1712 if (vflag && !tflag) 1713 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 1714 #endif 1715 } 1716 1717 #ifndef SMALL 1718 /* this is used with -r to recursively descend directories */ 1719 static void 1720 handle_dir(char *dir, struct stat *sbp) 1721 { 1722 char *path_argv[2]; 1723 FTS *fts; 1724 FTSENT *entry; 1725 1726 path_argv[0] = dir; 1727 path_argv[1] = 0; 1728 fts = fts_open(path_argv, FTS_PHYSICAL, NULL); 1729 if (fts == NULL) { 1730 warn("couldn't fts_open %s", dir); 1731 return; 1732 } 1733 1734 while ((entry = fts_read(fts))) { 1735 switch(entry->fts_info) { 1736 case FTS_D: 1737 case FTS_DP: 1738 continue; 1739 1740 case FTS_DNR: 1741 case FTS_ERR: 1742 case FTS_NS: 1743 maybe_warn("%s", entry->fts_path); 1744 continue; 1745 case FTS_F: 1746 handle_file(entry->fts_name, entry->fts_statp); 1747 } 1748 } 1749 (void)fts_close(fts); 1750 } 1751 #endif 1752 1753 /* print a ratio - size reduction as a fraction of uncompressed size */ 1754 static void 1755 print_ratio(off_t in, off_t out, FILE *where) 1756 { 1757 int percent10; /* 10 * percent */ 1758 off_t diff; 1759 char buff[8]; 1760 int len; 1761 1762 diff = in - out/2; 1763 if (diff <= 0) 1764 /* 1765 * Output is more than double size of input! print -99.9% 1766 * Quite possibly we've failed to get the original size. 1767 */ 1768 percent10 = -999; 1769 else { 1770 /* 1771 * We only need 12 bits of result from the final division, 1772 * so reduce the values until a 32bit division will suffice. 1773 */ 1774 while (in > 0x100000) { 1775 diff >>= 1; 1776 in >>= 1; 1777 } 1778 if (in != 0) 1779 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 1780 else 1781 percent10 = 0; 1782 } 1783 1784 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 1785 /* Move the '.' to before the last digit */ 1786 buff[len - 1] = buff[len - 2]; 1787 buff[len - 2] = '.'; 1788 fprintf(where, "%5s%%", buff); 1789 } 1790 1791 #ifndef SMALL 1792 /* print compression statistics, and the new name (if there is one!) */ 1793 static void 1794 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 1795 { 1796 if (file) 1797 fprintf(stderr, "%s:%s ", file, 1798 strlen(file) < 7 ? "\t\t" : "\t"); 1799 print_ratio(usize, gsize, stderr); 1800 if (nfile) 1801 fprintf(stderr, " -- replaced with %s", nfile); 1802 fprintf(stderr, "\n"); 1803 fflush(stderr); 1804 } 1805 1806 /* print test results */ 1807 static void 1808 print_test(const char *file, int ok) 1809 { 1810 1811 if (exit_value == 0 && ok == 0) 1812 exit_value = 1; 1813 fprintf(stderr, "%s:%s %s\n", file, 1814 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 1815 fflush(stderr); 1816 } 1817 #endif 1818 1819 /* print a file's info ala --list */ 1820 /* eg: 1821 compressed uncompressed ratio uncompressed_name 1822 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 1823 */ 1824 static void 1825 print_list(int fd, off_t out, const char *outfile, time_t ts) 1826 { 1827 static int first = 1; 1828 #ifndef SMALL 1829 static off_t in_tot, out_tot; 1830 uint32_t crc = 0; 1831 #endif 1832 off_t in = 0; 1833 int rv; 1834 1835 if (first) { 1836 #ifndef SMALL 1837 if (vflag) 1838 printf("method crc date time "); 1839 #endif 1840 if (qflag == 0) 1841 printf(" compressed uncompressed " 1842 "ratio uncompressed_name\n"); 1843 } 1844 first = 0; 1845 1846 /* print totals? */ 1847 #ifndef SMALL 1848 if (fd == -1) { 1849 in = in_tot; 1850 out = out_tot; 1851 } else 1852 #endif 1853 { 1854 /* read the last 4 bytes - this is the uncompressed size */ 1855 rv = lseek(fd, (off_t)(-8), SEEK_END); 1856 if (rv != -1) { 1857 unsigned char buf[8]; 1858 uint32_t usize; 1859 1860 if (read(fd, (char *)buf, sizeof(buf)) != sizeof(buf)) 1861 maybe_warn("read of uncompressed size"); 1862 usize = buf[4] | buf[5] << 8 | buf[6] << 16 | buf[7] << 24; 1863 in = (off_t)usize; 1864 #ifndef SMALL 1865 crc = buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24; 1866 #endif 1867 } 1868 } 1869 1870 #ifndef SMALL 1871 if (vflag && fd == -1) 1872 printf(" "); 1873 else if (vflag) { 1874 char *date = ctime(&ts); 1875 1876 /* skip the day, 1/100th second, and year */ 1877 date += 4; 1878 date[12] = 0; 1879 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 1880 } 1881 in_tot += in; 1882 out_tot += out; 1883 #endif 1884 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 1885 print_ratio(in, out, stdout); 1886 printf(" %s\n", outfile); 1887 } 1888 1889 /* display the usage of NetBSD gzip */ 1890 static void 1891 usage(void) 1892 { 1893 1894 fprintf(stderr, "%s\n", gzip_version); 1895 fprintf(stderr, 1896 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n" 1897 #ifndef SMALL 1898 " -c --stdout write to stdout, keep original files\n" 1899 " --to-stdout\n" 1900 " -d --decompress uncompress files\n" 1901 " --uncompress\n" 1902 " -f --force force overwriting & compress links\n" 1903 " -h --help display this help\n" 1904 " -n --no-name don't save original file name or time stamp\n" 1905 " -N --name save or restore original file name and time stamp\n" 1906 " -q --quiet output no warnings\n" 1907 " -r --recursive recursively compress files in directories\n" 1908 " -S .suf use suffix .suf instead of .gz\n" 1909 " --suffix .suf\n" 1910 " -t --test test compressed file\n" 1911 " -v --verbose print extra statistics\n" 1912 " -V --version display program version\n" 1913 " -1 --fast fastest (worst) compression\n" 1914 " -2 .. -8 set compression level\n" 1915 " -9 --best best (slowest) compression\n", 1916 #else 1917 , 1918 #endif 1919 getprogname()); 1920 exit(0); 1921 } 1922 1923 /* display the version of NetBSD gzip */ 1924 static void 1925 display_version(void) 1926 { 1927 1928 fprintf(stderr, "%s\n", gzip_version); 1929 exit(0); 1930 } 1931 1932 #ifndef NO_BZIP2_SUPPORT 1933 #include "unbzip2.c" 1934 #endif 1935 #ifndef NO_COMPRESS_SUPPORT 1936 #include "zuncompress.c" 1937 #endif 1938 1939 static ssize_t 1940 read_retry(int fd, void *buf, size_t sz) 1941 { 1942 char *cp = buf; 1943 ssize_t left = sz; 1944 1945 while (left > 0) { 1946 ssize_t ret; 1947 1948 ret = read(fd, cp, sz); 1949 if (ret == -1) { 1950 return ret; 1951 } else if (ret == 0) { 1952 break; /* EOF */ 1953 } 1954 cp += ret; 1955 left -= ret; 1956 } 1957 1958 return sz - left; 1959 } 1960