1 /* $NetBSD: gzip.c,v 1.99 2011/03/23 12:59:44 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998, 2003, 2004, 2006 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 */ 29 30 #include <sys/cdefs.h> 31 #ifndef lint 32 __COPYRIGHT("@(#) Copyright (c) 1997, 1998, 2003, 2004, 2006\ 33 Matthew R. Green. All rights reserved."); 34 __FBSDID("$FreeBSD$"); 35 #endif /* not lint */ 36 37 /* 38 * gzip.c -- GPL free gzip using zlib. 39 * 40 * RFC 1950 covers the zlib format 41 * RFC 1951 covers the deflate format 42 * RFC 1952 covers the gzip format 43 * 44 * TODO: 45 * - use mmap where possible 46 * - make bzip2/compress -v/-t/-l support work as well as possible 47 */ 48 49 #include <sys/param.h> 50 #include <sys/stat.h> 51 #include <sys/time.h> 52 53 #include <inttypes.h> 54 #include <unistd.h> 55 #include <stdio.h> 56 #include <string.h> 57 #include <stdlib.h> 58 #include <err.h> 59 #include <errno.h> 60 #include <fcntl.h> 61 #include <zlib.h> 62 #include <fts.h> 63 #include <libgen.h> 64 #include <stdarg.h> 65 #include <getopt.h> 66 #include <time.h> 67 68 /* what type of file are we dealing with */ 69 enum filetype { 70 FT_GZIP, 71 #ifndef NO_BZIP2_SUPPORT 72 FT_BZIP2, 73 #endif 74 #ifndef NO_COMPRESS_SUPPORT 75 FT_Z, 76 #endif 77 #ifndef NO_PACK_SUPPORT 78 FT_PACK, 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 #ifndef NO_PACK_SUPPORT 97 #define PACK_MAGIC "\037\036" 98 #endif 99 100 #define GZ_SUFFIX ".gz" 101 102 #define BUFLEN (64 * 1024) 103 104 #define GZIP_MAGIC0 0x1F 105 #define GZIP_MAGIC1 0x8B 106 #define GZIP_OMAGIC1 0x9E 107 108 #define GZIP_TIMESTAMP (off_t)4 109 #define GZIP_ORIGNAME (off_t)10 110 111 #define HEAD_CRC 0x02 112 #define EXTRA_FIELD 0x04 113 #define ORIG_NAME 0x08 114 #define COMMENT 0x10 115 116 #define OS_CODE 3 /* Unix */ 117 118 typedef struct { 119 const char *zipped; 120 int ziplen; 121 const char *normal; /* for unzip - must not be longer than zipped */ 122 } suffixes_t; 123 static suffixes_t suffixes[] = { 124 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N} 125 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */ 126 #ifndef SMALL 127 SUFFIX(GZ_SUFFIX, ""), 128 SUFFIX(".z", ""), 129 SUFFIX("-gz", ""), 130 SUFFIX("-z", ""), 131 SUFFIX("_z", ""), 132 SUFFIX(".taz", ".tar"), 133 SUFFIX(".tgz", ".tar"), 134 #ifndef NO_BZIP2_SUPPORT 135 SUFFIX(BZ2_SUFFIX, ""), 136 SUFFIX(".tbz", ".tar"), 137 SUFFIX(".tbz2", ".tar"), 138 #endif 139 #ifndef NO_COMPRESS_SUPPORT 140 SUFFIX(Z_SUFFIX, ""), 141 #endif 142 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */ 143 #endif /* SMALL */ 144 #undef SUFFIX 145 }; 146 #define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0]) 147 #define SUFFIX_MAXLEN 30 148 149 static const char gzip_version[] = "FreeBSD gzip 20110523"; 150 151 #ifndef SMALL 152 static const char gzip_copyright[] = \ 153 " Copyright (c) 1997, 1998, 2003, 2004, 2006 Matthew R. Green\n" 154 " All rights reserved.\n" 155 "\n" 156 " Redistribution and use in source and binary forms, with or without\n" 157 " modification, are permitted provided that the following conditions\n" 158 " are met:\n" 159 " 1. Redistributions of source code must retain the above copyright\n" 160 " notice, this list of conditions and the following disclaimer.\n" 161 " 2. Redistributions in binary form must reproduce the above copyright\n" 162 " notice, this list of conditions and the following disclaimer in the\n" 163 " documentation and/or other materials provided with the distribution.\n" 164 "\n" 165 " THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR\n" 166 " IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES\n" 167 " OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.\n" 168 " IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,\n" 169 " INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,\n" 170 " BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\n" 171 " LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED\n" 172 " AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,\n" 173 " OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\n" 174 " OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\n" 175 " SUCH DAMAGE."; 176 #endif 177 178 static int cflag; /* stdout mode */ 179 static int dflag; /* decompress mode */ 180 static int lflag; /* list mode */ 181 static int numflag = 6; /* gzip -1..-9 value */ 182 183 #ifndef SMALL 184 static int fflag; /* force mode */ 185 static int kflag; /* don't delete input files */ 186 static int nflag; /* don't save name/timestamp */ 187 static int Nflag; /* don't restore name/timestamp */ 188 static int qflag; /* quiet mode */ 189 static int rflag; /* recursive mode */ 190 static int tflag; /* test */ 191 static int vflag; /* verbose mode */ 192 static const char *remove_file = NULL; /* file to be removed upon SIGINT */ 193 #else 194 #define qflag 0 195 #define tflag 0 196 #endif 197 198 static int exit_value = 0; /* exit value */ 199 200 static char *infile; /* name of file coming in */ 201 202 static void maybe_err(const char *fmt, ...) __dead2 203 __attribute__((__format__(__printf__, 1, 2))); 204 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) 205 static void maybe_errx(const char *fmt, ...) __dead2 206 __attribute__((__format__(__printf__, 1, 2))); 207 #endif 208 static void maybe_warn(const char *fmt, ...) 209 __attribute__((__format__(__printf__, 1, 2))); 210 static void maybe_warnx(const char *fmt, ...) 211 __attribute__((__format__(__printf__, 1, 2))); 212 static enum filetype file_gettype(u_char *); 213 #ifdef SMALL 214 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz) 215 #endif 216 static off_t gz_compress(int, int, off_t *, const char *, uint32_t); 217 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *); 218 static off_t file_compress(char *, char *, size_t); 219 static off_t file_uncompress(char *, char *, size_t); 220 static void handle_pathname(char *); 221 static void handle_file(char *, struct stat *); 222 static void handle_stdin(void); 223 static void handle_stdout(void); 224 static void print_ratio(off_t, off_t, FILE *); 225 static void print_list(int fd, off_t, const char *, time_t); 226 static void usage(void); 227 static void display_version(void); 228 #ifndef SMALL 229 static void display_license(void); 230 static void sigint_handler(int); 231 #endif 232 static const suffixes_t *check_suffix(char *, int); 233 static ssize_t read_retry(int, void *, size_t); 234 235 #ifdef SMALL 236 #define unlink_input(f, sb) unlink(f) 237 #else 238 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd); 239 static void prepend_gzip(char *, int *, char ***); 240 static void handle_dir(char *); 241 static void print_verbage(const char *, const char *, off_t, off_t); 242 static void print_test(const char *, int); 243 static void copymodes(int fd, const struct stat *, const char *file); 244 static int check_outfile(const char *outfile); 245 #endif 246 247 #ifndef NO_BZIP2_SUPPORT 248 static off_t unbzip2(int, int, char *, size_t, off_t *); 249 #endif 250 251 #ifndef NO_COMPRESS_SUPPORT 252 static FILE *zdopen(int); 253 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *); 254 #endif 255 256 #ifndef NO_PACK_SUPPORT 257 static off_t unpack(int, int, char *, size_t, off_t *); 258 #endif 259 260 int main(int, char **p); 261 262 #ifdef SMALL 263 #define getopt_long(a,b,c,d,e) getopt(a,b,c) 264 #else 265 static const struct option longopts[] = { 266 { "stdout", no_argument, 0, 'c' }, 267 { "to-stdout", no_argument, 0, 'c' }, 268 { "decompress", no_argument, 0, 'd' }, 269 { "uncompress", no_argument, 0, 'd' }, 270 { "force", no_argument, 0, 'f' }, 271 { "help", no_argument, 0, 'h' }, 272 { "keep", no_argument, 0, 'k' }, 273 { "list", no_argument, 0, 'l' }, 274 { "no-name", no_argument, 0, 'n' }, 275 { "name", no_argument, 0, 'N' }, 276 { "quiet", no_argument, 0, 'q' }, 277 { "recursive", no_argument, 0, 'r' }, 278 { "suffix", required_argument, 0, 'S' }, 279 { "test", no_argument, 0, 't' }, 280 { "verbose", no_argument, 0, 'v' }, 281 { "version", no_argument, 0, 'V' }, 282 { "fast", no_argument, 0, '1' }, 283 { "best", no_argument, 0, '9' }, 284 { "ascii", no_argument, 0, 'a' }, 285 { "license", no_argument, 0, 'L' }, 286 { NULL, no_argument, 0, 0 }, 287 }; 288 #endif 289 290 int 291 main(int argc, char **argv) 292 { 293 const char *progname = getprogname(); 294 #ifndef SMALL 295 char *gzip; 296 int len; 297 #endif 298 int ch; 299 300 #ifndef SMALL 301 if ((gzip = getenv("GZIP")) != NULL) 302 prepend_gzip(gzip, &argc, &argv); 303 signal(SIGINT, sigint_handler); 304 #endif 305 306 /* 307 * XXX 308 * handle being called `gunzip', `zcat' and `gzcat' 309 */ 310 if (strcmp(progname, "gunzip") == 0) 311 dflag = 1; 312 else if (strcmp(progname, "zcat") == 0 || 313 strcmp(progname, "gzcat") == 0) 314 dflag = cflag = 1; 315 316 #ifdef SMALL 317 #define OPT_LIST "123456789cdhlV" 318 #else 319 #define OPT_LIST "123456789acdfhklLNnqrS:tVv" 320 #endif 321 322 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) { 323 switch (ch) { 324 case '1': case '2': case '3': 325 case '4': case '5': case '6': 326 case '7': case '8': case '9': 327 numflag = ch - '0'; 328 break; 329 case 'c': 330 cflag = 1; 331 break; 332 case 'd': 333 dflag = 1; 334 break; 335 case 'l': 336 lflag = 1; 337 dflag = 1; 338 break; 339 case 'V': 340 display_version(); 341 /* NOTREACHED */ 342 #ifndef SMALL 343 case 'a': 344 fprintf(stderr, "%s: option --ascii ignored on this system\n", progname); 345 break; 346 case 'f': 347 fflag = 1; 348 break; 349 case 'k': 350 kflag = 1; 351 break; 352 case 'L': 353 display_license(); 354 /* NOT REACHED */ 355 case 'N': 356 nflag = 0; 357 Nflag = 1; 358 break; 359 case 'n': 360 nflag = 1; 361 Nflag = 0; 362 break; 363 case 'q': 364 qflag = 1; 365 break; 366 case 'r': 367 rflag = 1; 368 break; 369 case 'S': 370 len = strlen(optarg); 371 if (len != 0) { 372 if (len > SUFFIX_MAXLEN) 373 errx(1, "incorrect suffix: '%s': too long", optarg); 374 suffixes[0].zipped = optarg; 375 suffixes[0].ziplen = len; 376 } else { 377 suffixes[NUM_SUFFIXES - 1].zipped = ""; 378 suffixes[NUM_SUFFIXES - 1].ziplen = 0; 379 } 380 break; 381 case 't': 382 cflag = 1; 383 tflag = 1; 384 dflag = 1; 385 break; 386 case 'v': 387 vflag = 1; 388 break; 389 #endif 390 default: 391 usage(); 392 /* NOTREACHED */ 393 } 394 } 395 argv += optind; 396 argc -= optind; 397 398 if (argc == 0) { 399 if (dflag) /* stdin mode */ 400 handle_stdin(); 401 else /* stdout mode */ 402 handle_stdout(); 403 } else { 404 do { 405 handle_pathname(argv[0]); 406 } while (*++argv); 407 } 408 #ifndef SMALL 409 if (qflag == 0 && lflag && argc > 1) 410 print_list(-1, 0, "(totals)", 0); 411 #endif 412 exit(exit_value); 413 } 414 415 /* maybe print a warning */ 416 void 417 maybe_warn(const char *fmt, ...) 418 { 419 va_list ap; 420 421 if (qflag == 0) { 422 va_start(ap, fmt); 423 vwarn(fmt, ap); 424 va_end(ap); 425 } 426 if (exit_value == 0) 427 exit_value = 1; 428 } 429 430 /* ... without an errno. */ 431 void 432 maybe_warnx(const char *fmt, ...) 433 { 434 va_list ap; 435 436 if (qflag == 0) { 437 va_start(ap, fmt); 438 vwarnx(fmt, ap); 439 va_end(ap); 440 } 441 if (exit_value == 0) 442 exit_value = 1; 443 } 444 445 /* maybe print an error */ 446 void 447 maybe_err(const char *fmt, ...) 448 { 449 va_list ap; 450 451 if (qflag == 0) { 452 va_start(ap, fmt); 453 vwarn(fmt, ap); 454 va_end(ap); 455 } 456 exit(2); 457 } 458 459 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) 460 /* ... without an errno. */ 461 void 462 maybe_errx(const char *fmt, ...) 463 { 464 va_list ap; 465 466 if (qflag == 0) { 467 va_start(ap, fmt); 468 vwarnx(fmt, ap); 469 va_end(ap); 470 } 471 exit(2); 472 } 473 #endif 474 475 #ifndef SMALL 476 /* split up $GZIP and prepend it to the argument list */ 477 static void 478 prepend_gzip(char *gzip, int *argc, char ***argv) 479 { 480 char *s, **nargv, **ac; 481 int nenvarg = 0, i; 482 483 /* scan how many arguments there are */ 484 for (s = gzip;;) { 485 while (*s == ' ' || *s == '\t') 486 s++; 487 if (*s == 0) 488 goto count_done; 489 nenvarg++; 490 while (*s != ' ' && *s != '\t') 491 if (*s++ == 0) 492 goto count_done; 493 } 494 count_done: 495 /* punt early */ 496 if (nenvarg == 0) 497 return; 498 499 *argc += nenvarg; 500 ac = *argv; 501 502 nargv = (char **)malloc((*argc + 1) * sizeof(char *)); 503 if (nargv == NULL) 504 maybe_err("malloc"); 505 506 /* stash this away */ 507 *argv = nargv; 508 509 /* copy the program name first */ 510 i = 0; 511 nargv[i++] = *(ac++); 512 513 /* take a copy of $GZIP and add it to the array */ 514 s = strdup(gzip); 515 if (s == NULL) 516 maybe_err("strdup"); 517 for (;;) { 518 /* Skip whitespaces. */ 519 while (*s == ' ' || *s == '\t') 520 s++; 521 if (*s == 0) 522 goto copy_done; 523 nargv[i++] = s; 524 /* Find the end of this argument. */ 525 while (*s != ' ' && *s != '\t') 526 if (*s++ == 0) 527 /* Argument followed by NUL. */ 528 goto copy_done; 529 /* Terminate by overwriting ' ' or '\t' with NUL. */ 530 *s++ = 0; 531 } 532 copy_done: 533 534 /* copy the original arguments and a NULL */ 535 while (*ac) 536 nargv[i++] = *(ac++); 537 nargv[i] = NULL; 538 } 539 #endif 540 541 /* compress input to output. Return bytes read, -1 on error */ 542 static off_t 543 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime) 544 { 545 z_stream z; 546 char *outbufp, *inbufp; 547 off_t in_tot = 0, out_tot = 0; 548 ssize_t in_size; 549 int i, error; 550 uLong crc; 551 #ifdef SMALL 552 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0, 553 0, 0, 0, 0, 554 0, OS_CODE }; 555 #endif 556 557 outbufp = malloc(BUFLEN); 558 inbufp = malloc(BUFLEN); 559 if (outbufp == NULL || inbufp == NULL) { 560 maybe_err("malloc failed"); 561 goto out; 562 } 563 564 memset(&z, 0, sizeof z); 565 z.zalloc = Z_NULL; 566 z.zfree = Z_NULL; 567 z.opaque = 0; 568 569 #ifdef SMALL 570 memcpy(outbufp, header, sizeof header); 571 i = sizeof header; 572 #else 573 if (nflag != 0) { 574 mtime = 0; 575 origname = ""; 576 } 577 578 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s", 579 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 580 *origname ? ORIG_NAME : 0, 581 mtime & 0xff, 582 (mtime >> 8) & 0xff, 583 (mtime >> 16) & 0xff, 584 (mtime >> 24) & 0xff, 585 numflag == 1 ? 4 : numflag == 9 ? 2 : 0, 586 OS_CODE, origname); 587 if (i >= BUFLEN) 588 /* this need PATH_MAX > BUFLEN ... */ 589 maybe_err("snprintf"); 590 if (*origname) 591 i++; 592 #endif 593 594 z.next_out = (unsigned char *)outbufp + i; 595 z.avail_out = BUFLEN - i; 596 597 error = deflateInit2(&z, numflag, Z_DEFLATED, 598 (-MAX_WBITS), 8, Z_DEFAULT_STRATEGY); 599 if (error != Z_OK) { 600 maybe_warnx("deflateInit2 failed"); 601 in_tot = -1; 602 goto out; 603 } 604 605 crc = crc32(0L, Z_NULL, 0); 606 for (;;) { 607 if (z.avail_out == 0) { 608 if (write(out, outbufp, BUFLEN) != BUFLEN) { 609 maybe_warn("write"); 610 out_tot = -1; 611 goto out; 612 } 613 614 out_tot += BUFLEN; 615 z.next_out = (unsigned char *)outbufp; 616 z.avail_out = BUFLEN; 617 } 618 619 if (z.avail_in == 0) { 620 in_size = read(in, inbufp, BUFLEN); 621 if (in_size < 0) { 622 maybe_warn("read"); 623 in_tot = -1; 624 goto out; 625 } 626 if (in_size == 0) 627 break; 628 629 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size); 630 in_tot += in_size; 631 z.next_in = (unsigned char *)inbufp; 632 z.avail_in = in_size; 633 } 634 635 error = deflate(&z, Z_NO_FLUSH); 636 if (error != Z_OK && error != Z_STREAM_END) { 637 maybe_warnx("deflate failed"); 638 in_tot = -1; 639 goto out; 640 } 641 } 642 643 /* clean up */ 644 for (;;) { 645 size_t len; 646 ssize_t w; 647 648 error = deflate(&z, Z_FINISH); 649 if (error != Z_OK && error != Z_STREAM_END) { 650 maybe_warnx("deflate failed"); 651 in_tot = -1; 652 goto out; 653 } 654 655 len = (char *)z.next_out - outbufp; 656 657 w = write(out, outbufp, len); 658 if (w == -1 || (size_t)w != len) { 659 maybe_warn("write"); 660 out_tot = -1; 661 goto out; 662 } 663 out_tot += len; 664 z.next_out = (unsigned char *)outbufp; 665 z.avail_out = BUFLEN; 666 667 if (error == Z_STREAM_END) 668 break; 669 } 670 671 if (deflateEnd(&z) != Z_OK) { 672 maybe_warnx("deflateEnd failed"); 673 in_tot = -1; 674 goto out; 675 } 676 677 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c", 678 (int)crc & 0xff, 679 (int)(crc >> 8) & 0xff, 680 (int)(crc >> 16) & 0xff, 681 (int)(crc >> 24) & 0xff, 682 (int)in_tot & 0xff, 683 (int)(in_tot >> 8) & 0xff, 684 (int)(in_tot >> 16) & 0xff, 685 (int)(in_tot >> 24) & 0xff); 686 if (i != 8) 687 maybe_err("snprintf"); 688 if (write(out, outbufp, i) != i) { 689 maybe_warn("write"); 690 in_tot = -1; 691 } else 692 out_tot += i; 693 694 out: 695 if (inbufp != NULL) 696 free(inbufp); 697 if (outbufp != NULL) 698 free(outbufp); 699 if (gsizep) 700 *gsizep = out_tot; 701 return in_tot; 702 } 703 704 /* 705 * uncompress input to output then close the input. return the 706 * uncompressed size written, and put the compressed sized read 707 * into `*gsizep'. 708 */ 709 static off_t 710 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep, 711 const char *filename) 712 { 713 z_stream z; 714 char *outbufp, *inbufp; 715 off_t out_tot = -1, in_tot = 0; 716 uint32_t out_sub_tot = 0; 717 enum { 718 GZSTATE_MAGIC0, 719 GZSTATE_MAGIC1, 720 GZSTATE_METHOD, 721 GZSTATE_FLAGS, 722 GZSTATE_SKIPPING, 723 GZSTATE_EXTRA, 724 GZSTATE_EXTRA2, 725 GZSTATE_EXTRA3, 726 GZSTATE_ORIGNAME, 727 GZSTATE_COMMENT, 728 GZSTATE_HEAD_CRC1, 729 GZSTATE_HEAD_CRC2, 730 GZSTATE_INIT, 731 GZSTATE_READ, 732 GZSTATE_CRC, 733 GZSTATE_LEN, 734 } state = GZSTATE_MAGIC0; 735 int flags = 0, skip_count = 0; 736 int error = Z_STREAM_ERROR, done_reading = 0; 737 uLong crc = 0; 738 ssize_t wr; 739 int needmore = 0; 740 741 #define ADVANCE() { z.next_in++; z.avail_in--; } 742 743 if ((outbufp = malloc(BUFLEN)) == NULL) { 744 maybe_err("malloc failed"); 745 goto out2; 746 } 747 if ((inbufp = malloc(BUFLEN)) == NULL) { 748 maybe_err("malloc failed"); 749 goto out1; 750 } 751 752 memset(&z, 0, sizeof z); 753 z.avail_in = prelen; 754 z.next_in = (unsigned char *)pre; 755 z.avail_out = BUFLEN; 756 z.next_out = (unsigned char *)outbufp; 757 z.zalloc = NULL; 758 z.zfree = NULL; 759 z.opaque = 0; 760 761 in_tot = prelen; 762 out_tot = 0; 763 764 for (;;) { 765 if ((z.avail_in == 0 || needmore) && done_reading == 0) { 766 ssize_t in_size; 767 768 if (z.avail_in > 0) { 769 memmove(inbufp, z.next_in, z.avail_in); 770 } 771 z.next_in = (unsigned char *)inbufp; 772 in_size = read(in, z.next_in + z.avail_in, 773 BUFLEN - z.avail_in); 774 775 if (in_size == -1) { 776 maybe_warn("failed to read stdin"); 777 goto stop_and_fail; 778 } else if (in_size == 0) { 779 done_reading = 1; 780 } 781 782 z.avail_in += in_size; 783 needmore = 0; 784 785 in_tot += in_size; 786 } 787 if (z.avail_in == 0) { 788 if (done_reading && state != GZSTATE_MAGIC0) { 789 maybe_warnx("%s: unexpected end of file", 790 filename); 791 goto stop_and_fail; 792 } 793 goto stop; 794 } 795 switch (state) { 796 case GZSTATE_MAGIC0: 797 if (*z.next_in != GZIP_MAGIC0) { 798 if (in_tot > 0) { 799 maybe_warnx("%s: trailing garbage " 800 "ignored", filename); 801 goto stop; 802 } 803 maybe_warnx("input not gziped (MAGIC0)"); 804 goto stop_and_fail; 805 } 806 ADVANCE(); 807 state++; 808 out_sub_tot = 0; 809 crc = crc32(0L, Z_NULL, 0); 810 break; 811 812 case GZSTATE_MAGIC1: 813 if (*z.next_in != GZIP_MAGIC1 && 814 *z.next_in != GZIP_OMAGIC1) { 815 maybe_warnx("input not gziped (MAGIC1)"); 816 goto stop_and_fail; 817 } 818 ADVANCE(); 819 state++; 820 break; 821 822 case GZSTATE_METHOD: 823 if (*z.next_in != Z_DEFLATED) { 824 maybe_warnx("unknown compression method"); 825 goto stop_and_fail; 826 } 827 ADVANCE(); 828 state++; 829 break; 830 831 case GZSTATE_FLAGS: 832 flags = *z.next_in; 833 ADVANCE(); 834 skip_count = 6; 835 state++; 836 break; 837 838 case GZSTATE_SKIPPING: 839 if (skip_count > 0) { 840 skip_count--; 841 ADVANCE(); 842 } else 843 state++; 844 break; 845 846 case GZSTATE_EXTRA: 847 if ((flags & EXTRA_FIELD) == 0) { 848 state = GZSTATE_ORIGNAME; 849 break; 850 } 851 skip_count = *z.next_in; 852 ADVANCE(); 853 state++; 854 break; 855 856 case GZSTATE_EXTRA2: 857 skip_count |= ((*z.next_in) << 8); 858 ADVANCE(); 859 state++; 860 break; 861 862 case GZSTATE_EXTRA3: 863 if (skip_count > 0) { 864 skip_count--; 865 ADVANCE(); 866 } else 867 state++; 868 break; 869 870 case GZSTATE_ORIGNAME: 871 if ((flags & ORIG_NAME) == 0) { 872 state++; 873 break; 874 } 875 if (*z.next_in == 0) 876 state++; 877 ADVANCE(); 878 break; 879 880 case GZSTATE_COMMENT: 881 if ((flags & COMMENT) == 0) { 882 state++; 883 break; 884 } 885 if (*z.next_in == 0) 886 state++; 887 ADVANCE(); 888 break; 889 890 case GZSTATE_HEAD_CRC1: 891 if (flags & HEAD_CRC) 892 skip_count = 2; 893 else 894 skip_count = 0; 895 state++; 896 break; 897 898 case GZSTATE_HEAD_CRC2: 899 if (skip_count > 0) { 900 skip_count--; 901 ADVANCE(); 902 } else 903 state++; 904 break; 905 906 case GZSTATE_INIT: 907 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) { 908 maybe_warnx("failed to inflateInit"); 909 goto stop_and_fail; 910 } 911 state++; 912 break; 913 914 case GZSTATE_READ: 915 error = inflate(&z, Z_FINISH); 916 switch (error) { 917 /* Z_BUF_ERROR goes with Z_FINISH... */ 918 case Z_BUF_ERROR: 919 if (z.avail_out > 0 && !done_reading) 920 continue; 921 922 case Z_STREAM_END: 923 case Z_OK: 924 break; 925 926 case Z_NEED_DICT: 927 maybe_warnx("Z_NEED_DICT error"); 928 goto stop_and_fail; 929 case Z_DATA_ERROR: 930 maybe_warnx("data stream error"); 931 goto stop_and_fail; 932 case Z_STREAM_ERROR: 933 maybe_warnx("internal stream error"); 934 goto stop_and_fail; 935 case Z_MEM_ERROR: 936 maybe_warnx("memory allocation error"); 937 goto stop_and_fail; 938 939 default: 940 maybe_warn("unknown error from inflate(): %d", 941 error); 942 } 943 wr = BUFLEN - z.avail_out; 944 945 if (wr != 0) { 946 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 947 if ( 948 #ifndef SMALL 949 /* don't write anything with -t */ 950 tflag == 0 && 951 #endif 952 write(out, outbufp, wr) != wr) { 953 maybe_warn("error writing to output"); 954 goto stop_and_fail; 955 } 956 957 out_tot += wr; 958 out_sub_tot += wr; 959 } 960 961 if (error == Z_STREAM_END) { 962 inflateEnd(&z); 963 state++; 964 } 965 966 z.next_out = (unsigned char *)outbufp; 967 z.avail_out = BUFLEN; 968 969 break; 970 case GZSTATE_CRC: 971 { 972 uLong origcrc; 973 974 if (z.avail_in < 4) { 975 if (!done_reading) { 976 needmore = 1; 977 continue; 978 } 979 maybe_warnx("truncated input"); 980 goto stop_and_fail; 981 } 982 origcrc = ((unsigned)z.next_in[0] & 0xff) | 983 ((unsigned)z.next_in[1] & 0xff) << 8 | 984 ((unsigned)z.next_in[2] & 0xff) << 16 | 985 ((unsigned)z.next_in[3] & 0xff) << 24; 986 if (origcrc != crc) { 987 maybe_warnx("invalid compressed" 988 " data--crc error"); 989 goto stop_and_fail; 990 } 991 } 992 993 z.avail_in -= 4; 994 z.next_in += 4; 995 996 if (!z.avail_in && done_reading) { 997 goto stop; 998 } 999 state++; 1000 break; 1001 case GZSTATE_LEN: 1002 { 1003 uLong origlen; 1004 1005 if (z.avail_in < 4) { 1006 if (!done_reading) { 1007 needmore = 1; 1008 continue; 1009 } 1010 maybe_warnx("truncated input"); 1011 goto stop_and_fail; 1012 } 1013 origlen = ((unsigned)z.next_in[0] & 0xff) | 1014 ((unsigned)z.next_in[1] & 0xff) << 8 | 1015 ((unsigned)z.next_in[2] & 0xff) << 16 | 1016 ((unsigned)z.next_in[3] & 0xff) << 24; 1017 1018 if (origlen != out_sub_tot) { 1019 maybe_warnx("invalid compressed" 1020 " data--length error"); 1021 goto stop_and_fail; 1022 } 1023 } 1024 1025 z.avail_in -= 4; 1026 z.next_in += 4; 1027 1028 if (error < 0) { 1029 maybe_warnx("decompression error"); 1030 goto stop_and_fail; 1031 } 1032 state = GZSTATE_MAGIC0; 1033 break; 1034 } 1035 continue; 1036 stop_and_fail: 1037 out_tot = -1; 1038 stop: 1039 break; 1040 } 1041 if (state > GZSTATE_INIT) 1042 inflateEnd(&z); 1043 1044 free(inbufp); 1045 out1: 1046 free(outbufp); 1047 out2: 1048 if (gsizep) 1049 *gsizep = in_tot; 1050 return (out_tot); 1051 } 1052 1053 #ifndef SMALL 1054 /* 1055 * set the owner, mode, flags & utimes using the given file descriptor. 1056 * file is only used in possible warning messages. 1057 */ 1058 static void 1059 copymodes(int fd, const struct stat *sbp, const char *file) 1060 { 1061 struct timeval times[2]; 1062 struct stat sb; 1063 1064 /* 1065 * If we have no info on the input, give this file some 1066 * default values and return.. 1067 */ 1068 if (sbp == NULL) { 1069 mode_t mask = umask(022); 1070 1071 (void)fchmod(fd, DEFFILEMODE & ~mask); 1072 (void)umask(mask); 1073 return; 1074 } 1075 sb = *sbp; 1076 1077 /* if the chown fails, remove set-id bits as-per compress(1) */ 1078 if (fchown(fd, sb.st_uid, sb.st_gid) < 0) { 1079 if (errno != EPERM) 1080 maybe_warn("couldn't fchown: %s", file); 1081 sb.st_mode &= ~(S_ISUID|S_ISGID); 1082 } 1083 1084 /* we only allow set-id and the 9 normal permission bits */ 1085 sb.st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1086 if (fchmod(fd, sb.st_mode) < 0) 1087 maybe_warn("couldn't fchmod: %s", file); 1088 1089 TIMESPEC_TO_TIMEVAL(×[0], &sb.st_atim); 1090 TIMESPEC_TO_TIMEVAL(×[1], &sb.st_mtim); 1091 if (futimes(fd, times) < 0) 1092 maybe_warn("couldn't utimes: %s", file); 1093 1094 /* only try flags if they exist already */ 1095 if (sb.st_flags != 0 && fchflags(fd, sb.st_flags) < 0) 1096 maybe_warn("couldn't fchflags: %s", file); 1097 } 1098 #endif 1099 1100 /* what sort of file is this? */ 1101 static enum filetype 1102 file_gettype(u_char *buf) 1103 { 1104 1105 if (buf[0] == GZIP_MAGIC0 && 1106 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1107 return FT_GZIP; 1108 else 1109 #ifndef NO_BZIP2_SUPPORT 1110 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1111 buf[3] >= '0' && buf[3] <= '9') 1112 return FT_BZIP2; 1113 else 1114 #endif 1115 #ifndef NO_COMPRESS_SUPPORT 1116 if (memcmp(buf, Z_MAGIC, 2) == 0) 1117 return FT_Z; 1118 else 1119 #endif 1120 #ifndef NO_PACK_SUPPORT 1121 if (memcmp(buf, PACK_MAGIC, 2) == 0) 1122 return FT_PACK; 1123 else 1124 #endif 1125 return FT_UNKNOWN; 1126 } 1127 1128 #ifndef SMALL 1129 /* check the outfile is OK. */ 1130 static int 1131 check_outfile(const char *outfile) 1132 { 1133 struct stat sb; 1134 int ok = 1; 1135 1136 if (lflag == 0 && stat(outfile, &sb) == 0) { 1137 if (fflag) 1138 unlink(outfile); 1139 else if (isatty(STDIN_FILENO)) { 1140 char ans[10] = { 'n', '\0' }; /* default */ 1141 1142 fprintf(stderr, "%s already exists -- do you wish to " 1143 "overwrite (y or n)? " , outfile); 1144 (void)fgets(ans, sizeof(ans) - 1, stdin); 1145 if (ans[0] != 'y' && ans[0] != 'Y') { 1146 fprintf(stderr, "\tnot overwriting\n"); 1147 ok = 0; 1148 } else 1149 unlink(outfile); 1150 } else { 1151 maybe_warnx("%s already exists -- skipping", outfile); 1152 ok = 0; 1153 } 1154 } 1155 return ok; 1156 } 1157 1158 static void 1159 unlink_input(const char *file, const struct stat *sb) 1160 { 1161 struct stat nsb; 1162 1163 if (kflag) 1164 return; 1165 if (stat(file, &nsb) != 0) 1166 /* Must be gone already */ 1167 return; 1168 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1169 /* Definitely a different file */ 1170 return; 1171 unlink(file); 1172 } 1173 1174 static void 1175 sigint_handler(int signo __unused) 1176 { 1177 1178 if (remove_file != NULL) 1179 unlink(remove_file); 1180 _exit(2); 1181 } 1182 #endif 1183 1184 static const suffixes_t * 1185 check_suffix(char *file, int xlate) 1186 { 1187 const suffixes_t *s; 1188 int len = strlen(file); 1189 char *sp; 1190 1191 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1192 /* if it doesn't fit in "a.suf", don't bother */ 1193 if (s->ziplen >= len) 1194 continue; 1195 sp = file + len - s->ziplen; 1196 if (strcmp(s->zipped, sp) != 0) 1197 continue; 1198 if (xlate) 1199 strcpy(sp, s->normal); 1200 return s; 1201 } 1202 return NULL; 1203 } 1204 1205 /* 1206 * compress the given file: create a corresponding .gz file and remove the 1207 * original. 1208 */ 1209 static off_t 1210 file_compress(char *file, char *outfile, size_t outsize) 1211 { 1212 int in; 1213 int out; 1214 off_t size, insize; 1215 #ifndef SMALL 1216 struct stat isb, osb; 1217 const suffixes_t *suff; 1218 #endif 1219 1220 in = open(file, O_RDONLY); 1221 if (in == -1) { 1222 maybe_warn("can't open %s", file); 1223 return (-1); 1224 } 1225 1226 #ifndef SMALL 1227 if (fstat(in, &isb) != 0) { 1228 maybe_warn("couldn't stat: %s", file); 1229 close(in); 1230 return (-1); 1231 } 1232 #endif 1233 1234 if (cflag == 0) { 1235 #ifndef SMALL 1236 if (isb.st_nlink > 1 && fflag == 0) { 1237 maybe_warnx("%s has %d other link%s -- skipping", 1238 file, isb.st_nlink - 1, 1239 (isb.st_nlink - 1) == 1 ? "" : "s"); 1240 close(in); 1241 return (-1); 1242 } 1243 1244 if (fflag == 0 && (suff = check_suffix(file, 0)) && 1245 suff->zipped[0] != 0) { 1246 maybe_warnx("%s already has %s suffix -- unchanged", 1247 file, suff->zipped); 1248 close(in); 1249 return (-1); 1250 } 1251 #endif 1252 1253 /* Add (usually) .gz to filename */ 1254 if ((size_t)snprintf(outfile, outsize, "%s%s", 1255 file, suffixes[0].zipped) >= outsize) 1256 memcpy(outfile + outsize - suffixes[0].ziplen - 1, 1257 suffixes[0].zipped, suffixes[0].ziplen + 1); 1258 1259 #ifndef SMALL 1260 if (check_outfile(outfile) == 0) { 1261 close(in); 1262 return (-1); 1263 } 1264 #endif 1265 } 1266 1267 if (cflag == 0) { 1268 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600); 1269 if (out == -1) { 1270 maybe_warn("could not create output: %s", outfile); 1271 fclose(stdin); 1272 return (-1); 1273 } 1274 #ifndef SMALL 1275 remove_file = outfile; 1276 #endif 1277 } else 1278 out = STDOUT_FILENO; 1279 1280 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1281 1282 (void)close(in); 1283 1284 /* 1285 * If there was an error, insize will be -1. 1286 * If we compressed to stdout, just return the size. 1287 * Otherwise stat the file and check it is the correct size. 1288 * We only blow away the file if we can stat the output and it 1289 * has the expected size. 1290 */ 1291 if (cflag != 0) 1292 return (insize == -1 ? -1 : size); 1293 1294 #ifndef SMALL 1295 if (fstat(out, &osb) != 0) { 1296 maybe_warn("couldn't stat: %s", outfile); 1297 goto bad_outfile; 1298 } 1299 1300 if (osb.st_size != size) { 1301 maybe_warnx("output file: %s wrong size (%ju != %ju), deleting", 1302 outfile, (uintmax_t)osb.st_size, (uintmax_t)size); 1303 goto bad_outfile; 1304 } 1305 1306 copymodes(out, &isb, outfile); 1307 remove_file = NULL; 1308 #endif 1309 if (close(out) == -1) 1310 maybe_warn("couldn't close output"); 1311 1312 /* output is good, ok to delete input */ 1313 unlink_input(file, &isb); 1314 return (size); 1315 1316 #ifndef SMALL 1317 bad_outfile: 1318 if (close(out) == -1) 1319 maybe_warn("couldn't close output"); 1320 1321 maybe_warnx("leaving original %s", file); 1322 unlink(outfile); 1323 return (size); 1324 #endif 1325 } 1326 1327 /* uncompress the given file and remove the original */ 1328 static off_t 1329 file_uncompress(char *file, char *outfile, size_t outsize) 1330 { 1331 struct stat isb, osb; 1332 off_t size; 1333 ssize_t rbytes; 1334 unsigned char header1[4]; 1335 enum filetype method; 1336 int fd, ofd, zfd = -1; 1337 #ifndef SMALL 1338 ssize_t rv; 1339 time_t timestamp = 0; 1340 unsigned char name[PATH_MAX + 1]; 1341 #endif 1342 1343 /* gather the old name info */ 1344 1345 fd = open(file, O_RDONLY); 1346 if (fd < 0) { 1347 maybe_warn("can't open %s", file); 1348 goto lose; 1349 } 1350 1351 strlcpy(outfile, file, outsize); 1352 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1353 maybe_warnx("%s: unknown suffix -- ignored", file); 1354 goto lose; 1355 } 1356 1357 rbytes = read(fd, header1, sizeof header1); 1358 if (rbytes != sizeof header1) { 1359 /* we don't want to fail here. */ 1360 #ifndef SMALL 1361 if (fflag) 1362 goto lose; 1363 #endif 1364 if (rbytes == -1) 1365 maybe_warn("can't read %s", file); 1366 else 1367 goto unexpected_EOF; 1368 goto lose; 1369 } 1370 1371 method = file_gettype(header1); 1372 1373 #ifndef SMALL 1374 if (fflag == 0 && method == FT_UNKNOWN) { 1375 maybe_warnx("%s: not in gzip format", file); 1376 goto lose; 1377 } 1378 1379 #endif 1380 1381 #ifndef SMALL 1382 if (method == FT_GZIP && Nflag) { 1383 unsigned char ts[4]; /* timestamp */ 1384 1385 rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP); 1386 if (rv >= 0 && rv < (ssize_t)(sizeof ts)) 1387 goto unexpected_EOF; 1388 if (rv == -1) { 1389 if (!fflag) 1390 maybe_warn("can't read %s", file); 1391 goto lose; 1392 } 1393 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0]; 1394 1395 if (header1[3] & ORIG_NAME) { 1396 rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME); 1397 if (rbytes < 0) { 1398 maybe_warn("can't read %s", file); 1399 goto lose; 1400 } 1401 if (name[0] != 0) { 1402 /* preserve original directory name */ 1403 char *dp = strrchr(file, '/'); 1404 if (dp == NULL) 1405 dp = file; 1406 else 1407 dp++; 1408 snprintf(outfile, outsize, "%.*s%.*s", 1409 (int) (dp - file), 1410 file, (int) rbytes, name); 1411 } 1412 } 1413 } 1414 #endif 1415 lseek(fd, 0, SEEK_SET); 1416 1417 if (cflag == 0 || lflag) { 1418 if (fstat(fd, &isb) != 0) 1419 goto lose; 1420 #ifndef SMALL 1421 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1422 maybe_warnx("%s has %d other links -- skipping", 1423 file, isb.st_nlink - 1); 1424 goto lose; 1425 } 1426 if (nflag == 0 && timestamp) 1427 isb.st_mtime = timestamp; 1428 if (check_outfile(outfile) == 0) 1429 goto lose; 1430 #endif 1431 } 1432 1433 if (cflag == 0 && lflag == 0) { 1434 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1435 if (zfd == STDOUT_FILENO) { 1436 /* We won't close STDOUT_FILENO later... */ 1437 zfd = dup(zfd); 1438 close(STDOUT_FILENO); 1439 } 1440 if (zfd == -1) { 1441 maybe_warn("can't open %s", outfile); 1442 goto lose; 1443 } 1444 #ifndef SMALL 1445 remove_file = outfile; 1446 #endif 1447 } else 1448 zfd = STDOUT_FILENO; 1449 1450 #ifndef NO_BZIP2_SUPPORT 1451 if (method == FT_BZIP2) { 1452 1453 /* XXX */ 1454 if (lflag) { 1455 maybe_warnx("no -l with bzip2 files"); 1456 goto lose; 1457 } 1458 1459 size = unbzip2(fd, zfd, NULL, 0, NULL); 1460 } else 1461 #endif 1462 1463 #ifndef NO_COMPRESS_SUPPORT 1464 if (method == FT_Z) { 1465 FILE *in, *out; 1466 1467 /* XXX */ 1468 if (lflag) { 1469 maybe_warnx("no -l with Lempel-Ziv files"); 1470 goto lose; 1471 } 1472 1473 if ((in = zdopen(fd)) == NULL) { 1474 maybe_warn("zdopen for read: %s", file); 1475 goto lose; 1476 } 1477 1478 out = fdopen(dup(zfd), "w"); 1479 if (out == NULL) { 1480 maybe_warn("fdopen for write: %s", outfile); 1481 fclose(in); 1482 goto lose; 1483 } 1484 1485 size = zuncompress(in, out, NULL, 0, NULL); 1486 /* need to fclose() if ferror() is true... */ 1487 if (ferror(in) | fclose(in)) { 1488 maybe_warn("failed infile fclose"); 1489 unlink(outfile); 1490 (void)fclose(out); 1491 } 1492 if (fclose(out) != 0) { 1493 maybe_warn("failed outfile fclose"); 1494 unlink(outfile); 1495 goto lose; 1496 } 1497 } else 1498 #endif 1499 1500 #ifndef NO_PACK_SUPPORT 1501 if (method == FT_PACK) { 1502 if (lflag) { 1503 maybe_warnx("no -l with packed files"); 1504 goto lose; 1505 } 1506 1507 size = unpack(fd, zfd, NULL, 0, NULL); 1508 } else 1509 #endif 1510 1511 #ifndef SMALL 1512 if (method == FT_UNKNOWN) { 1513 if (lflag) { 1514 maybe_warnx("no -l for unknown filetypes"); 1515 goto lose; 1516 } 1517 size = cat_fd(NULL, 0, NULL, fd); 1518 } else 1519 #endif 1520 { 1521 if (lflag) { 1522 print_list(fd, isb.st_size, outfile, isb.st_mtime); 1523 close(fd); 1524 return -1; /* XXX */ 1525 } 1526 1527 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1528 } 1529 1530 if (close(fd) != 0) 1531 maybe_warn("couldn't close input"); 1532 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1533 maybe_warn("couldn't close output"); 1534 1535 if (size == -1) { 1536 if (cflag == 0) 1537 unlink(outfile); 1538 maybe_warnx("%s: uncompress failed", file); 1539 return -1; 1540 } 1541 1542 /* if testing, or we uncompressed to stdout, this is all we need */ 1543 #ifndef SMALL 1544 if (tflag) 1545 return size; 1546 #endif 1547 /* if we are uncompressing to stdin, don't remove the file. */ 1548 if (cflag) 1549 return size; 1550 1551 /* 1552 * if we create a file... 1553 */ 1554 /* 1555 * if we can't stat the file don't remove the file. 1556 */ 1557 1558 ofd = open(outfile, O_RDWR, 0); 1559 if (ofd == -1) { 1560 maybe_warn("couldn't open (leaving original): %s", 1561 outfile); 1562 return -1; 1563 } 1564 if (fstat(ofd, &osb) != 0) { 1565 maybe_warn("couldn't stat (leaving original): %s", 1566 outfile); 1567 close(ofd); 1568 return -1; 1569 } 1570 if (osb.st_size != size) { 1571 maybe_warnx("stat gave different size: %ju != %ju (leaving original)", 1572 (uintmax_t)size, (uintmax_t)osb.st_size); 1573 close(ofd); 1574 unlink(outfile); 1575 return -1; 1576 } 1577 #ifndef SMALL 1578 copymodes(ofd, &isb, outfile); 1579 remove_file = NULL; 1580 #endif 1581 close(ofd); 1582 unlink_input(file, &isb); 1583 return size; 1584 1585 unexpected_EOF: 1586 maybe_warnx("%s: unexpected end of file", file); 1587 lose: 1588 if (fd != -1) 1589 close(fd); 1590 if (zfd != -1 && zfd != STDOUT_FILENO) 1591 close(fd); 1592 return -1; 1593 } 1594 1595 #ifndef SMALL 1596 static off_t 1597 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd) 1598 { 1599 char buf[BUFLEN]; 1600 off_t in_tot; 1601 ssize_t w; 1602 1603 in_tot = count; 1604 w = write(STDOUT_FILENO, prepend, count); 1605 if (w == -1 || (size_t)w != count) { 1606 maybe_warn("write to stdout"); 1607 return -1; 1608 } 1609 for (;;) { 1610 ssize_t rv; 1611 1612 rv = read(fd, buf, sizeof buf); 1613 if (rv == 0) 1614 break; 1615 if (rv < 0) { 1616 maybe_warn("read from fd %d", fd); 1617 break; 1618 } 1619 1620 if (write(STDOUT_FILENO, buf, rv) != rv) { 1621 maybe_warn("write to stdout"); 1622 break; 1623 } 1624 in_tot += rv; 1625 } 1626 1627 if (gsizep) 1628 *gsizep = in_tot; 1629 return (in_tot); 1630 } 1631 #endif 1632 1633 static void 1634 handle_stdin(void) 1635 { 1636 unsigned char header1[4]; 1637 off_t usize, gsize; 1638 enum filetype method; 1639 ssize_t bytes_read; 1640 #ifndef NO_COMPRESS_SUPPORT 1641 FILE *in; 1642 #endif 1643 1644 #ifndef SMALL 1645 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1646 maybe_warnx("standard input is a terminal -- ignoring"); 1647 return; 1648 } 1649 #endif 1650 1651 if (lflag) { 1652 struct stat isb; 1653 1654 /* XXX could read the whole file, etc. */ 1655 if (fstat(STDIN_FILENO, &isb) < 0) { 1656 maybe_warn("fstat"); 1657 return; 1658 } 1659 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime); 1660 return; 1661 } 1662 1663 bytes_read = read_retry(STDIN_FILENO, header1, sizeof header1); 1664 if (bytes_read == -1) { 1665 maybe_warn("can't read stdin"); 1666 return; 1667 } else if (bytes_read != sizeof(header1)) { 1668 maybe_warnx("(stdin): unexpected end of file"); 1669 return; 1670 } 1671 1672 method = file_gettype(header1); 1673 switch (method) { 1674 default: 1675 #ifndef SMALL 1676 if (fflag == 0) { 1677 maybe_warnx("unknown compression format"); 1678 return; 1679 } 1680 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO); 1681 break; 1682 #endif 1683 case FT_GZIP: 1684 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1685 (char *)header1, sizeof header1, &gsize, "(stdin)"); 1686 break; 1687 #ifndef NO_BZIP2_SUPPORT 1688 case FT_BZIP2: 1689 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1690 (char *)header1, sizeof header1, &gsize); 1691 break; 1692 #endif 1693 #ifndef NO_COMPRESS_SUPPORT 1694 case FT_Z: 1695 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1696 maybe_warnx("zopen of stdin"); 1697 return; 1698 } 1699 1700 usize = zuncompress(in, stdout, (char *)header1, sizeof header1, &gsize); 1701 fclose(in); 1702 break; 1703 #endif 1704 #ifndef NO_PACK_SUPPORT 1705 case FT_PACK: 1706 usize = unpack(STDIN_FILENO, STDOUT_FILENO, 1707 (char *)header1, sizeof header1, &gsize); 1708 break; 1709 #endif 1710 } 1711 1712 #ifndef SMALL 1713 if (vflag && !tflag && usize != -1 && gsize != -1) 1714 print_verbage(NULL, NULL, usize, gsize); 1715 if (vflag && tflag) 1716 print_test("(stdin)", usize != -1); 1717 #endif 1718 1719 } 1720 1721 static void 1722 handle_stdout(void) 1723 { 1724 off_t gsize, usize; 1725 struct stat sb; 1726 time_t systime; 1727 uint32_t mtime; 1728 int ret; 1729 1730 #ifndef SMALL 1731 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1732 maybe_warnx("standard output is a terminal -- ignoring"); 1733 return; 1734 } 1735 #endif 1736 /* If stdin is a file use it's mtime, otherwise use current time */ 1737 ret = fstat(STDIN_FILENO, &sb); 1738 1739 #ifndef SMALL 1740 if (ret < 0) { 1741 maybe_warn("Can't stat stdin"); 1742 return; 1743 } 1744 #endif 1745 1746 if (S_ISREG(sb.st_mode)) 1747 mtime = (uint32_t)sb.st_mtime; 1748 else { 1749 systime = time(NULL); 1750 #ifndef SMALL 1751 if (systime == -1) { 1752 maybe_warn("time"); 1753 return; 1754 } 1755 #endif 1756 mtime = (uint32_t)systime; 1757 } 1758 1759 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime); 1760 #ifndef SMALL 1761 if (vflag && !tflag && usize != -1 && gsize != -1) 1762 print_verbage(NULL, NULL, usize, gsize); 1763 #endif 1764 } 1765 1766 /* do what is asked for, for the path name */ 1767 static void 1768 handle_pathname(char *path) 1769 { 1770 char *opath = path, *s = NULL; 1771 ssize_t len; 1772 int slen; 1773 struct stat sb; 1774 1775 /* check for stdout/stdin */ 1776 if (path[0] == '-' && path[1] == '\0') { 1777 if (dflag) 1778 handle_stdin(); 1779 else 1780 handle_stdout(); 1781 return; 1782 } 1783 1784 retry: 1785 if (stat(path, &sb) != 0 || (fflag == 0 && cflag == 0 && 1786 lstat(path, &sb) != 0)) { 1787 /* lets try <path>.gz if we're decompressing */ 1788 if (dflag && s == NULL && errno == ENOENT) { 1789 len = strlen(path); 1790 slen = suffixes[0].ziplen; 1791 s = malloc(len + slen + 1); 1792 if (s == NULL) 1793 maybe_err("malloc"); 1794 memcpy(s, path, len); 1795 memcpy(s + len, suffixes[0].zipped, slen + 1); 1796 path = s; 1797 goto retry; 1798 } 1799 maybe_warn("can't stat: %s", opath); 1800 goto out; 1801 } 1802 1803 if (S_ISDIR(sb.st_mode)) { 1804 #ifndef SMALL 1805 if (rflag) 1806 handle_dir(path); 1807 else 1808 #endif 1809 maybe_warnx("%s is a directory", path); 1810 goto out; 1811 } 1812 1813 if (S_ISREG(sb.st_mode)) 1814 handle_file(path, &sb); 1815 else 1816 maybe_warnx("%s is not a regular file", path); 1817 1818 out: 1819 if (s) 1820 free(s); 1821 } 1822 1823 /* compress/decompress a file */ 1824 static void 1825 handle_file(char *file, struct stat *sbp) 1826 { 1827 off_t usize, gsize; 1828 char outfile[PATH_MAX]; 1829 1830 infile = file; 1831 if (dflag) { 1832 usize = file_uncompress(file, outfile, sizeof(outfile)); 1833 #ifndef SMALL 1834 if (vflag && tflag) 1835 print_test(file, usize != -1); 1836 #endif 1837 if (usize == -1) 1838 return; 1839 gsize = sbp->st_size; 1840 } else { 1841 gsize = file_compress(file, outfile, sizeof(outfile)); 1842 if (gsize == -1) 1843 return; 1844 usize = sbp->st_size; 1845 } 1846 1847 1848 #ifndef SMALL 1849 if (vflag && !tflag) 1850 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 1851 #endif 1852 } 1853 1854 #ifndef SMALL 1855 /* this is used with -r to recursively descend directories */ 1856 static void 1857 handle_dir(char *dir) 1858 { 1859 char *path_argv[2]; 1860 FTS *fts; 1861 FTSENT *entry; 1862 1863 path_argv[0] = dir; 1864 path_argv[1] = 0; 1865 fts = fts_open(path_argv, FTS_PHYSICAL | FTS_NOCHDIR, NULL); 1866 if (fts == NULL) { 1867 warn("couldn't fts_open %s", dir); 1868 return; 1869 } 1870 1871 while ((entry = fts_read(fts))) { 1872 switch(entry->fts_info) { 1873 case FTS_D: 1874 case FTS_DP: 1875 continue; 1876 1877 case FTS_DNR: 1878 case FTS_ERR: 1879 case FTS_NS: 1880 maybe_warn("%s", entry->fts_path); 1881 continue; 1882 case FTS_F: 1883 handle_file(entry->fts_path, entry->fts_statp); 1884 } 1885 } 1886 (void)fts_close(fts); 1887 } 1888 #endif 1889 1890 /* print a ratio - size reduction as a fraction of uncompressed size */ 1891 static void 1892 print_ratio(off_t in, off_t out, FILE *where) 1893 { 1894 int percent10; /* 10 * percent */ 1895 off_t diff; 1896 char buff[8]; 1897 int len; 1898 1899 diff = in - out/2; 1900 if (diff <= 0) 1901 /* 1902 * Output is more than double size of input! print -99.9% 1903 * Quite possibly we've failed to get the original size. 1904 */ 1905 percent10 = -999; 1906 else { 1907 /* 1908 * We only need 12 bits of result from the final division, 1909 * so reduce the values until a 32bit division will suffice. 1910 */ 1911 while (in > 0x100000) { 1912 diff >>= 1; 1913 in >>= 1; 1914 } 1915 if (in != 0) 1916 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 1917 else 1918 percent10 = 0; 1919 } 1920 1921 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 1922 /* Move the '.' to before the last digit */ 1923 buff[len - 1] = buff[len - 2]; 1924 buff[len - 2] = '.'; 1925 fprintf(where, "%5s%%", buff); 1926 } 1927 1928 #ifndef SMALL 1929 /* print compression statistics, and the new name (if there is one!) */ 1930 static void 1931 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 1932 { 1933 if (file) 1934 fprintf(stderr, "%s:%s ", file, 1935 strlen(file) < 7 ? "\t\t" : "\t"); 1936 print_ratio(usize, gsize, stderr); 1937 if (nfile) 1938 fprintf(stderr, " -- replaced with %s", nfile); 1939 fprintf(stderr, "\n"); 1940 fflush(stderr); 1941 } 1942 1943 /* print test results */ 1944 static void 1945 print_test(const char *file, int ok) 1946 { 1947 1948 if (exit_value == 0 && ok == 0) 1949 exit_value = 1; 1950 fprintf(stderr, "%s:%s %s\n", file, 1951 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 1952 fflush(stderr); 1953 } 1954 #endif 1955 1956 /* print a file's info ala --list */ 1957 /* eg: 1958 compressed uncompressed ratio uncompressed_name 1959 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 1960 */ 1961 static void 1962 print_list(int fd, off_t out, const char *outfile, time_t ts) 1963 { 1964 static int first = 1; 1965 #ifndef SMALL 1966 static off_t in_tot, out_tot; 1967 uint32_t crc = 0; 1968 #endif 1969 off_t in = 0, rv; 1970 1971 if (first) { 1972 #ifndef SMALL 1973 if (vflag) 1974 printf("method crc date time "); 1975 #endif 1976 if (qflag == 0) 1977 printf(" compressed uncompressed " 1978 "ratio uncompressed_name\n"); 1979 } 1980 first = 0; 1981 1982 /* print totals? */ 1983 #ifndef SMALL 1984 if (fd == -1) { 1985 in = in_tot; 1986 out = out_tot; 1987 } else 1988 #endif 1989 { 1990 /* read the last 4 bytes - this is the uncompressed size */ 1991 rv = lseek(fd, (off_t)(-8), SEEK_END); 1992 if (rv != -1) { 1993 unsigned char buf[8]; 1994 uint32_t usize; 1995 1996 rv = read(fd, (char *)buf, sizeof(buf)); 1997 if (rv == -1) 1998 maybe_warn("read of uncompressed size"); 1999 else if (rv != sizeof(buf)) 2000 maybe_warnx("read of uncompressed size"); 2001 2002 else { 2003 usize = buf[4] | buf[5] << 8 | 2004 buf[6] << 16 | buf[7] << 24; 2005 in = (off_t)usize; 2006 #ifndef SMALL 2007 crc = buf[0] | buf[1] << 8 | 2008 buf[2] << 16 | buf[3] << 24; 2009 #endif 2010 } 2011 } 2012 } 2013 2014 #ifndef SMALL 2015 if (vflag && fd == -1) 2016 printf(" "); 2017 else if (vflag) { 2018 char *date = ctime(&ts); 2019 2020 /* skip the day, 1/100th second, and year */ 2021 date += 4; 2022 date[12] = 0; 2023 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 2024 } 2025 in_tot += in; 2026 out_tot += out; 2027 #else 2028 (void)&ts; /* XXX */ 2029 #endif 2030 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 2031 print_ratio(in, out, stdout); 2032 printf(" %s\n", outfile); 2033 } 2034 2035 /* display the usage of NetBSD gzip */ 2036 static void 2037 usage(void) 2038 { 2039 2040 fprintf(stderr, "%s\n", gzip_version); 2041 fprintf(stderr, 2042 #ifdef SMALL 2043 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n", 2044 #else 2045 "usage: %s [-123456789acdfhklLNnqrtVv] [-S .suffix] [<file> [<file> ...]]\n" 2046 " -1 --fast fastest (worst) compression\n" 2047 " -2 .. -8 set compression level\n" 2048 " -9 --best best (slowest) compression\n" 2049 " -c --stdout write to stdout, keep original files\n" 2050 " --to-stdout\n" 2051 " -d --decompress uncompress files\n" 2052 " --uncompress\n" 2053 " -f --force force overwriting & compress links\n" 2054 " -h --help display this help\n" 2055 " -k --keep don't delete input files during operation\n" 2056 " -l --list list compressed file contents\n" 2057 " -N --name save or restore original file name and time stamp\n" 2058 " -n --no-name don't save original file name or time stamp\n" 2059 " -q --quiet output no warnings\n" 2060 " -r --recursive recursively compress files in directories\n" 2061 " -S .suf use suffix .suf instead of .gz\n" 2062 " --suffix .suf\n" 2063 " -t --test test compressed file\n" 2064 " -V --version display program version\n" 2065 " -v --verbose print extra statistics\n", 2066 #endif 2067 getprogname()); 2068 exit(0); 2069 } 2070 2071 #ifndef SMALL 2072 /* display the license information of FreeBSD gzip */ 2073 static void 2074 display_license(void) 2075 { 2076 2077 fprintf(stderr, "%s (based on NetBSD gzip 20091011)\n", gzip_version); 2078 fprintf(stderr, "%s\n", gzip_copyright); 2079 exit(0); 2080 } 2081 #endif 2082 2083 /* display the version of NetBSD gzip */ 2084 static void 2085 display_version(void) 2086 { 2087 2088 fprintf(stderr, "%s\n", gzip_version); 2089 exit(0); 2090 } 2091 2092 #ifndef NO_BZIP2_SUPPORT 2093 #include "unbzip2.c" 2094 #endif 2095 #ifndef NO_COMPRESS_SUPPORT 2096 #include "zuncompress.c" 2097 #endif 2098 #ifndef NO_PACK_SUPPORT 2099 #include "unpack.c" 2100 #endif 2101 2102 static ssize_t 2103 read_retry(int fd, void *buf, size_t sz) 2104 { 2105 char *cp = buf; 2106 size_t left = MIN(sz, (size_t) SSIZE_MAX); 2107 2108 while (left > 0) { 2109 ssize_t ret; 2110 2111 ret = read(fd, cp, left); 2112 if (ret == -1) { 2113 return ret; 2114 } else if (ret == 0) { 2115 break; /* EOF */ 2116 } 2117 cp += ret; 2118 left -= ret; 2119 } 2120 2121 return sz - left; 2122 } 2123