1 /* $NetBSD: gzip.c,v 1.97 2009/10/11 09:17:21 mrg 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 __RCSID("$FreeBSD$"); 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 20100407"; 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 "123456789cdhltV" 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 case Z_STREAM_END: 922 case Z_OK: 923 break; 924 925 case Z_NEED_DICT: 926 maybe_warnx("Z_NEED_DICT error"); 927 goto stop_and_fail; 928 case Z_DATA_ERROR: 929 maybe_warnx("data stream error"); 930 goto stop_and_fail; 931 case Z_STREAM_ERROR: 932 maybe_warnx("internal stream error"); 933 goto stop_and_fail; 934 case Z_MEM_ERROR: 935 maybe_warnx("memory allocation error"); 936 goto stop_and_fail; 937 938 default: 939 maybe_warn("unknown error from inflate(): %d", 940 error); 941 } 942 wr = BUFLEN - z.avail_out; 943 944 if (wr != 0) { 945 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 946 if ( 947 #ifndef SMALL 948 /* don't write anything with -t */ 949 tflag == 0 && 950 #endif 951 write(out, outbufp, wr) != wr) { 952 maybe_warn("error writing to output"); 953 goto stop_and_fail; 954 } 955 956 out_tot += wr; 957 out_sub_tot += wr; 958 } 959 960 if (error == Z_STREAM_END) { 961 inflateEnd(&z); 962 state++; 963 } 964 965 z.next_out = (unsigned char *)outbufp; 966 z.avail_out = BUFLEN; 967 968 break; 969 case GZSTATE_CRC: 970 { 971 uLong origcrc; 972 973 if (z.avail_in < 4) { 974 if (!done_reading) { 975 needmore = 1; 976 continue; 977 } 978 maybe_warnx("truncated input"); 979 goto stop_and_fail; 980 } 981 origcrc = ((unsigned)z.next_in[0] & 0xff) | 982 ((unsigned)z.next_in[1] & 0xff) << 8 | 983 ((unsigned)z.next_in[2] & 0xff) << 16 | 984 ((unsigned)z.next_in[3] & 0xff) << 24; 985 if (origcrc != crc) { 986 maybe_warnx("invalid compressed" 987 " data--crc error"); 988 goto stop_and_fail; 989 } 990 } 991 992 z.avail_in -= 4; 993 z.next_in += 4; 994 995 if (!z.avail_in && done_reading) { 996 goto stop; 997 } 998 state++; 999 break; 1000 case GZSTATE_LEN: 1001 { 1002 uLong origlen; 1003 1004 if (z.avail_in < 4) { 1005 if (!done_reading) { 1006 needmore = 1; 1007 continue; 1008 } 1009 maybe_warnx("truncated input"); 1010 goto stop_and_fail; 1011 } 1012 origlen = ((unsigned)z.next_in[0] & 0xff) | 1013 ((unsigned)z.next_in[1] & 0xff) << 8 | 1014 ((unsigned)z.next_in[2] & 0xff) << 16 | 1015 ((unsigned)z.next_in[3] & 0xff) << 24; 1016 1017 if (origlen != out_sub_tot) { 1018 maybe_warnx("invalid compressed" 1019 " data--length error"); 1020 goto stop_and_fail; 1021 } 1022 } 1023 1024 z.avail_in -= 4; 1025 z.next_in += 4; 1026 1027 if (error < 0) { 1028 maybe_warnx("decompression error"); 1029 goto stop_and_fail; 1030 } 1031 state = GZSTATE_MAGIC0; 1032 break; 1033 } 1034 continue; 1035 stop_and_fail: 1036 out_tot = -1; 1037 stop: 1038 break; 1039 } 1040 if (state > GZSTATE_INIT) 1041 inflateEnd(&z); 1042 1043 free(inbufp); 1044 out1: 1045 free(outbufp); 1046 out2: 1047 if (gsizep) 1048 *gsizep = in_tot; 1049 return (out_tot); 1050 } 1051 1052 #ifndef SMALL 1053 /* 1054 * set the owner, mode, flags & utimes using the given file descriptor. 1055 * file is only used in possible warning messages. 1056 */ 1057 static void 1058 copymodes(int fd, const struct stat *sbp, const char *file) 1059 { 1060 struct timeval times[2]; 1061 struct stat sb; 1062 1063 /* 1064 * If we have no info on the input, give this file some 1065 * default values and return.. 1066 */ 1067 if (sbp == NULL) { 1068 mode_t mask = umask(022); 1069 1070 (void)fchmod(fd, DEFFILEMODE & ~mask); 1071 (void)umask(mask); 1072 return; 1073 } 1074 sb = *sbp; 1075 1076 /* if the chown fails, remove set-id bits as-per compress(1) */ 1077 if (fchown(fd, sb.st_uid, sb.st_gid) < 0) { 1078 if (errno != EPERM) 1079 maybe_warn("couldn't fchown: %s", file); 1080 sb.st_mode &= ~(S_ISUID|S_ISGID); 1081 } 1082 1083 /* we only allow set-id and the 9 normal permission bits */ 1084 sb.st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1085 if (fchmod(fd, sb.st_mode) < 0) 1086 maybe_warn("couldn't fchmod: %s", file); 1087 1088 TIMESPEC_TO_TIMEVAL(×[0], &sb.st_atim); 1089 TIMESPEC_TO_TIMEVAL(×[1], &sb.st_mtim); 1090 if (futimes(fd, times) < 0) 1091 maybe_warn("couldn't utimes: %s", file); 1092 1093 /* only try flags if they exist already */ 1094 if (sb.st_flags != 0 && fchflags(fd, sb.st_flags) < 0) 1095 maybe_warn("couldn't fchflags: %s", file); 1096 } 1097 #endif 1098 1099 /* what sort of file is this? */ 1100 static enum filetype 1101 file_gettype(u_char *buf) 1102 { 1103 1104 if (buf[0] == GZIP_MAGIC0 && 1105 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1106 return FT_GZIP; 1107 else 1108 #ifndef NO_BZIP2_SUPPORT 1109 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1110 buf[3] >= '0' && buf[3] <= '9') 1111 return FT_BZIP2; 1112 else 1113 #endif 1114 #ifndef NO_COMPRESS_SUPPORT 1115 if (memcmp(buf, Z_MAGIC, 2) == 0) 1116 return FT_Z; 1117 else 1118 #endif 1119 #ifndef NO_PACK_SUPPORT 1120 if (memcmp(buf, PACK_MAGIC, 2) == 0) 1121 return FT_PACK; 1122 else 1123 #endif 1124 return FT_UNKNOWN; 1125 } 1126 1127 #ifndef SMALL 1128 /* check the outfile is OK. */ 1129 static int 1130 check_outfile(const char *outfile) 1131 { 1132 struct stat sb; 1133 int ok = 1; 1134 1135 if (lflag == 0 && stat(outfile, &sb) == 0) { 1136 if (fflag) 1137 unlink(outfile); 1138 else if (isatty(STDIN_FILENO)) { 1139 char ans[10] = { 'n', '\0' }; /* default */ 1140 1141 fprintf(stderr, "%s already exists -- do you wish to " 1142 "overwrite (y or n)? " , outfile); 1143 (void)fgets(ans, sizeof(ans) - 1, stdin); 1144 if (ans[0] != 'y' && ans[0] != 'Y') { 1145 fprintf(stderr, "\tnot overwriting\n"); 1146 ok = 0; 1147 } else 1148 unlink(outfile); 1149 } else { 1150 maybe_warnx("%s already exists -- skipping", outfile); 1151 ok = 0; 1152 } 1153 } 1154 return ok; 1155 } 1156 1157 static void 1158 unlink_input(const char *file, const struct stat *sb) 1159 { 1160 struct stat nsb; 1161 1162 if (kflag) 1163 return; 1164 if (stat(file, &nsb) != 0) 1165 /* Must be gone already */ 1166 return; 1167 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1168 /* Definitely a different file */ 1169 return; 1170 unlink(file); 1171 } 1172 1173 static void 1174 sigint_handler(int signo __unused) 1175 { 1176 1177 if (remove_file != NULL) 1178 unlink(remove_file); 1179 _exit(2); 1180 } 1181 #endif 1182 1183 static const suffixes_t * 1184 check_suffix(char *file, int xlate) 1185 { 1186 const suffixes_t *s; 1187 int len = strlen(file); 1188 char *sp; 1189 1190 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1191 /* if it doesn't fit in "a.suf", don't bother */ 1192 if (s->ziplen >= len) 1193 continue; 1194 sp = file + len - s->ziplen; 1195 if (strcmp(s->zipped, sp) != 0) 1196 continue; 1197 if (xlate) 1198 strcpy(sp, s->normal); 1199 return s; 1200 } 1201 return NULL; 1202 } 1203 1204 /* 1205 * compress the given file: create a corresponding .gz file and remove the 1206 * original. 1207 */ 1208 static off_t 1209 file_compress(char *file, char *outfile, size_t outsize) 1210 { 1211 int in; 1212 int out; 1213 off_t size, insize; 1214 #ifndef SMALL 1215 struct stat isb, osb; 1216 const suffixes_t *suff; 1217 #endif 1218 1219 in = open(file, O_RDONLY); 1220 if (in == -1) { 1221 maybe_warn("can't open %s", file); 1222 return (-1); 1223 } 1224 1225 #ifndef SMALL 1226 if (fstat(in, &isb) != 0) { 1227 maybe_warn("couldn't stat: %s", file); 1228 close(in); 1229 return (-1); 1230 } 1231 #endif 1232 1233 if (cflag == 0) { 1234 #ifndef SMALL 1235 if (isb.st_nlink > 1 && fflag == 0) { 1236 maybe_warnx("%s has %d other link%s -- skipping", 1237 file, isb.st_nlink - 1, 1238 (isb.st_nlink - 1) == 1 ? "" : "s"); 1239 close(in); 1240 return (-1); 1241 } 1242 1243 if (fflag == 0 && (suff = check_suffix(file, 0)) && 1244 suff->zipped[0] != 0) { 1245 maybe_warnx("%s already has %s suffix -- unchanged", 1246 file, suff->zipped); 1247 close(in); 1248 return (-1); 1249 } 1250 #endif 1251 1252 /* Add (usually) .gz to filename */ 1253 if ((size_t)snprintf(outfile, outsize, "%s%s", 1254 file, suffixes[0].zipped) >= outsize) 1255 memcpy(outfile + outsize - suffixes[0].ziplen - 1, 1256 suffixes[0].zipped, suffixes[0].ziplen + 1); 1257 1258 #ifndef SMALL 1259 if (check_outfile(outfile) == 0) { 1260 close(in); 1261 return (-1); 1262 } 1263 #endif 1264 } 1265 1266 if (cflag == 0) { 1267 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600); 1268 if (out == -1) { 1269 maybe_warn("could not create output: %s", outfile); 1270 fclose(stdin); 1271 return (-1); 1272 } 1273 #ifndef SMALL 1274 remove_file = outfile; 1275 #endif 1276 } else 1277 out = STDOUT_FILENO; 1278 1279 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1280 1281 (void)close(in); 1282 1283 /* 1284 * If there was an error, insize will be -1. 1285 * If we compressed to stdout, just return the size. 1286 * Otherwise stat the file and check it is the correct size. 1287 * We only blow away the file if we can stat the output and it 1288 * has the expected size. 1289 */ 1290 if (cflag != 0) 1291 return (insize == -1 ? -1 : size); 1292 1293 #ifndef SMALL 1294 if (fstat(out, &osb) != 0) { 1295 maybe_warn("couldn't stat: %s", outfile); 1296 goto bad_outfile; 1297 } 1298 1299 if (osb.st_size != size) { 1300 maybe_warnx("output file: %s wrong size (%ju != %ju), deleting", 1301 outfile, (uintmax_t)osb.st_size, (uintmax_t)size); 1302 goto bad_outfile; 1303 } 1304 1305 copymodes(out, &isb, outfile); 1306 remove_file = NULL; 1307 #endif 1308 if (close(out) == -1) 1309 maybe_warn("couldn't close output"); 1310 1311 /* output is good, ok to delete input */ 1312 unlink_input(file, &isb); 1313 return (size); 1314 1315 #ifndef SMALL 1316 bad_outfile: 1317 if (close(out) == -1) 1318 maybe_warn("couldn't close output"); 1319 1320 maybe_warnx("leaving original %s", file); 1321 unlink(outfile); 1322 return (size); 1323 #endif 1324 } 1325 1326 /* uncompress the given file and remove the original */ 1327 static off_t 1328 file_uncompress(char *file, char *outfile, size_t outsize) 1329 { 1330 struct stat isb, osb; 1331 off_t size; 1332 ssize_t rbytes; 1333 unsigned char header1[4]; 1334 enum filetype method; 1335 int fd, ofd, zfd = -1; 1336 #ifndef SMALL 1337 ssize_t rv; 1338 time_t timestamp = 0; 1339 unsigned char name[PATH_MAX + 1]; 1340 #endif 1341 1342 /* gather the old name info */ 1343 1344 fd = open(file, O_RDONLY); 1345 if (fd < 0) { 1346 maybe_warn("can't open %s", file); 1347 goto lose; 1348 } 1349 1350 strlcpy(outfile, file, outsize); 1351 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1352 maybe_warnx("%s: unknown suffix -- ignored", file); 1353 goto lose; 1354 } 1355 1356 rbytes = read(fd, header1, sizeof header1); 1357 if (rbytes != sizeof header1) { 1358 /* we don't want to fail here. */ 1359 #ifndef SMALL 1360 if (fflag) 1361 goto lose; 1362 #endif 1363 if (rbytes == -1) 1364 maybe_warn("can't read %s", file); 1365 else 1366 goto unexpected_EOF; 1367 goto lose; 1368 } 1369 1370 method = file_gettype(header1); 1371 1372 #ifndef SMALL 1373 if (fflag == 0 && method == FT_UNKNOWN) { 1374 maybe_warnx("%s: not in gzip format", file); 1375 goto lose; 1376 } 1377 1378 #endif 1379 1380 #ifndef SMALL 1381 if (method == FT_GZIP && Nflag) { 1382 unsigned char ts[4]; /* timestamp */ 1383 1384 rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP); 1385 if (rv >= 0 && rv < (ssize_t)(sizeof ts)) 1386 goto unexpected_EOF; 1387 if (rv == -1) { 1388 if (!fflag) 1389 maybe_warn("can't read %s", file); 1390 goto lose; 1391 } 1392 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0]; 1393 1394 if (header1[3] & ORIG_NAME) { 1395 rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME); 1396 if (rbytes < 0) { 1397 maybe_warn("can't read %s", file); 1398 goto lose; 1399 } 1400 if (name[0] != 0) { 1401 /* preserve original directory name */ 1402 char *dp = strrchr(file, '/'); 1403 if (dp == NULL) 1404 dp = file; 1405 else 1406 dp++; 1407 snprintf(outfile, outsize, "%.*s%.*s", 1408 (int) (dp - file), 1409 file, (int) rbytes, name); 1410 } 1411 } 1412 } 1413 #endif 1414 lseek(fd, 0, SEEK_SET); 1415 1416 if (cflag == 0 || lflag) { 1417 if (fstat(fd, &isb) != 0) 1418 goto lose; 1419 #ifndef SMALL 1420 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1421 maybe_warnx("%s has %d other links -- skipping", 1422 file, isb.st_nlink - 1); 1423 goto lose; 1424 } 1425 if (nflag == 0 && timestamp) 1426 isb.st_mtime = timestamp; 1427 if (check_outfile(outfile) == 0) 1428 goto lose; 1429 #endif 1430 } 1431 1432 if (cflag == 0 && lflag == 0) { 1433 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1434 if (zfd == STDOUT_FILENO) { 1435 /* We won't close STDOUT_FILENO later... */ 1436 zfd = dup(zfd); 1437 close(STDOUT_FILENO); 1438 } 1439 if (zfd == -1) { 1440 maybe_warn("can't open %s", outfile); 1441 goto lose; 1442 } 1443 #ifndef SMALL 1444 remove_file = outfile; 1445 #endif 1446 } else 1447 zfd = STDOUT_FILENO; 1448 1449 #ifndef NO_BZIP2_SUPPORT 1450 if (method == FT_BZIP2) { 1451 1452 /* XXX */ 1453 if (lflag) { 1454 maybe_warnx("no -l with bzip2 files"); 1455 goto lose; 1456 } 1457 1458 size = unbzip2(fd, zfd, NULL, 0, NULL); 1459 } else 1460 #endif 1461 1462 #ifndef NO_COMPRESS_SUPPORT 1463 if (method == FT_Z) { 1464 FILE *in, *out; 1465 1466 /* XXX */ 1467 if (lflag) { 1468 maybe_warnx("no -l with Lempel-Ziv files"); 1469 goto lose; 1470 } 1471 1472 if ((in = zdopen(fd)) == NULL) { 1473 maybe_warn("zdopen for read: %s", file); 1474 goto lose; 1475 } 1476 1477 out = fdopen(dup(zfd), "w"); 1478 if (out == NULL) { 1479 maybe_warn("fdopen for write: %s", outfile); 1480 fclose(in); 1481 goto lose; 1482 } 1483 1484 size = zuncompress(in, out, NULL, 0, NULL); 1485 /* need to fclose() if ferror() is true... */ 1486 if (ferror(in) | fclose(in)) { 1487 maybe_warn("failed infile fclose"); 1488 unlink(outfile); 1489 (void)fclose(out); 1490 } 1491 if (fclose(out) != 0) { 1492 maybe_warn("failed outfile fclose"); 1493 unlink(outfile); 1494 goto lose; 1495 } 1496 } else 1497 #endif 1498 1499 #ifndef NO_PACK_SUPPORT 1500 if (method == FT_PACK) { 1501 if (lflag) { 1502 maybe_warnx("no -l with packed files"); 1503 goto lose; 1504 } 1505 1506 size = unpack(fd, zfd, NULL, 0, NULL); 1507 } else 1508 #endif 1509 1510 #ifndef SMALL 1511 if (method == FT_UNKNOWN) { 1512 if (lflag) { 1513 maybe_warnx("no -l for unknown filetypes"); 1514 goto lose; 1515 } 1516 size = cat_fd(NULL, 0, NULL, fd); 1517 } else 1518 #endif 1519 { 1520 if (lflag) { 1521 print_list(fd, isb.st_size, outfile, isb.st_mtime); 1522 close(fd); 1523 return -1; /* XXX */ 1524 } 1525 1526 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1527 } 1528 1529 if (close(fd) != 0) 1530 maybe_warn("couldn't close input"); 1531 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1532 maybe_warn("couldn't close output"); 1533 1534 if (size == -1) { 1535 if (cflag == 0) 1536 unlink(outfile); 1537 maybe_warnx("%s: uncompress failed", file); 1538 return -1; 1539 } 1540 1541 /* if testing, or we uncompressed to stdout, this is all we need */ 1542 #ifndef SMALL 1543 if (tflag) 1544 return size; 1545 #endif 1546 /* if we are uncompressing to stdin, don't remove the file. */ 1547 if (cflag) 1548 return size; 1549 1550 /* 1551 * if we create a file... 1552 */ 1553 /* 1554 * if we can't stat the file don't remove the file. 1555 */ 1556 1557 ofd = open(outfile, O_RDWR, 0); 1558 if (ofd == -1) { 1559 maybe_warn("couldn't open (leaving original): %s", 1560 outfile); 1561 return -1; 1562 } 1563 if (fstat(ofd, &osb) != 0) { 1564 maybe_warn("couldn't stat (leaving original): %s", 1565 outfile); 1566 close(ofd); 1567 return -1; 1568 } 1569 if (osb.st_size != size) { 1570 maybe_warnx("stat gave different size: %ju != %ju (leaving original)", 1571 (uintmax_t)size, (uintmax_t)osb.st_size); 1572 close(ofd); 1573 unlink(outfile); 1574 return -1; 1575 } 1576 #ifndef SMALL 1577 copymodes(ofd, &isb, outfile); 1578 remove_file = NULL; 1579 #endif 1580 close(ofd); 1581 unlink_input(file, &isb); 1582 return size; 1583 1584 unexpected_EOF: 1585 maybe_warnx("%s: unexpected end of file", file); 1586 lose: 1587 if (fd != -1) 1588 close(fd); 1589 if (zfd != -1 && zfd != STDOUT_FILENO) 1590 close(fd); 1591 return -1; 1592 } 1593 1594 #ifndef SMALL 1595 static off_t 1596 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd) 1597 { 1598 char buf[BUFLEN]; 1599 off_t in_tot; 1600 ssize_t w; 1601 1602 in_tot = count; 1603 w = write(STDOUT_FILENO, prepend, count); 1604 if (w == -1 || (size_t)w != count) { 1605 maybe_warn("write to stdout"); 1606 return -1; 1607 } 1608 for (;;) { 1609 ssize_t rv; 1610 1611 rv = read(fd, buf, sizeof buf); 1612 if (rv == 0) 1613 break; 1614 if (rv < 0) { 1615 maybe_warn("read from fd %d", fd); 1616 break; 1617 } 1618 1619 if (write(STDOUT_FILENO, buf, rv) != rv) { 1620 maybe_warn("write to stdout"); 1621 break; 1622 } 1623 in_tot += rv; 1624 } 1625 1626 if (gsizep) 1627 *gsizep = in_tot; 1628 return (in_tot); 1629 } 1630 #endif 1631 1632 static void 1633 handle_stdin(void) 1634 { 1635 unsigned char header1[4]; 1636 off_t usize, gsize; 1637 enum filetype method; 1638 ssize_t bytes_read; 1639 #ifndef NO_COMPRESS_SUPPORT 1640 FILE *in; 1641 #endif 1642 1643 #ifndef SMALL 1644 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1645 maybe_warnx("standard input is a terminal -- ignoring"); 1646 return; 1647 } 1648 #endif 1649 1650 if (lflag) { 1651 struct stat isb; 1652 1653 /* XXX could read the whole file, etc. */ 1654 if (fstat(STDIN_FILENO, &isb) < 0) { 1655 maybe_warn("fstat"); 1656 return; 1657 } 1658 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime); 1659 return; 1660 } 1661 1662 bytes_read = read_retry(STDIN_FILENO, header1, sizeof header1); 1663 if (bytes_read == -1) { 1664 maybe_warn("can't read stdin"); 1665 return; 1666 } else if (bytes_read != sizeof(header1)) { 1667 maybe_warnx("(stdin): unexpected end of file"); 1668 return; 1669 } 1670 1671 method = file_gettype(header1); 1672 switch (method) { 1673 default: 1674 #ifndef SMALL 1675 if (fflag == 0) { 1676 maybe_warnx("unknown compression format"); 1677 return; 1678 } 1679 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO); 1680 break; 1681 #endif 1682 case FT_GZIP: 1683 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1684 (char *)header1, sizeof header1, &gsize, "(stdin)"); 1685 break; 1686 #ifndef NO_BZIP2_SUPPORT 1687 case FT_BZIP2: 1688 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1689 (char *)header1, sizeof header1, &gsize); 1690 break; 1691 #endif 1692 #ifndef NO_COMPRESS_SUPPORT 1693 case FT_Z: 1694 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1695 maybe_warnx("zopen of stdin"); 1696 return; 1697 } 1698 1699 usize = zuncompress(in, stdout, (char *)header1, sizeof header1, &gsize); 1700 fclose(in); 1701 break; 1702 #endif 1703 #ifndef NO_PACK_SUPPORT 1704 case FT_PACK: 1705 usize = unpack(STDIN_FILENO, STDOUT_FILENO, 1706 (char *)header1, sizeof header1, &gsize); 1707 break; 1708 #endif 1709 } 1710 1711 #ifndef SMALL 1712 if (vflag && !tflag && usize != -1 && gsize != -1) 1713 print_verbage(NULL, NULL, usize, gsize); 1714 if (vflag && tflag) 1715 print_test("(stdin)", usize != -1); 1716 #endif 1717 1718 } 1719 1720 static void 1721 handle_stdout(void) 1722 { 1723 off_t gsize, usize; 1724 struct stat sb; 1725 time_t systime; 1726 uint32_t mtime; 1727 int ret; 1728 1729 #ifndef SMALL 1730 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1731 maybe_warnx("standard output is a terminal -- ignoring"); 1732 return; 1733 } 1734 #endif 1735 /* If stdin is a file use it's mtime, otherwise use current time */ 1736 ret = fstat(STDIN_FILENO, &sb); 1737 1738 #ifndef SMALL 1739 if (ret < 0) { 1740 maybe_warn("Can't stat stdin"); 1741 return; 1742 } 1743 #endif 1744 1745 if (S_ISREG(sb.st_mode)) 1746 mtime = (uint32_t)sb.st_mtime; 1747 else { 1748 systime = time(NULL); 1749 #ifndef SMALL 1750 if (systime == -1) { 1751 maybe_warn("time"); 1752 return; 1753 } 1754 #endif 1755 mtime = (uint32_t)systime; 1756 } 1757 1758 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime); 1759 #ifndef SMALL 1760 if (vflag && !tflag && usize != -1 && gsize != -1) 1761 print_verbage(NULL, NULL, usize, gsize); 1762 #endif 1763 } 1764 1765 /* do what is asked for, for the path name */ 1766 static void 1767 handle_pathname(char *path) 1768 { 1769 char *opath = path, *s = NULL; 1770 ssize_t len; 1771 int slen; 1772 struct stat sb; 1773 1774 /* check for stdout/stdin */ 1775 if (path[0] == '-' && path[1] == '\0') { 1776 if (dflag) 1777 handle_stdin(); 1778 else 1779 handle_stdout(); 1780 return; 1781 } 1782 1783 retry: 1784 if (stat(path, &sb) != 0) { 1785 /* lets try <path>.gz if we're decompressing */ 1786 if (dflag && s == NULL && errno == ENOENT) { 1787 len = strlen(path); 1788 slen = suffixes[0].ziplen; 1789 s = malloc(len + slen + 1); 1790 if (s == NULL) 1791 maybe_err("malloc"); 1792 memcpy(s, path, len); 1793 memcpy(s + len, suffixes[0].zipped, slen + 1); 1794 path = s; 1795 goto retry; 1796 } 1797 maybe_warn("can't stat: %s", opath); 1798 goto out; 1799 } 1800 1801 if (S_ISDIR(sb.st_mode)) { 1802 #ifndef SMALL 1803 if (rflag) 1804 handle_dir(path); 1805 else 1806 #endif 1807 maybe_warnx("%s is a directory", path); 1808 goto out; 1809 } 1810 1811 if (S_ISREG(sb.st_mode)) 1812 handle_file(path, &sb); 1813 else 1814 maybe_warnx("%s is not a regular file", path); 1815 1816 out: 1817 if (s) 1818 free(s); 1819 } 1820 1821 /* compress/decompress a file */ 1822 static void 1823 handle_file(char *file, struct stat *sbp) 1824 { 1825 off_t usize, gsize; 1826 char outfile[PATH_MAX]; 1827 1828 infile = file; 1829 if (dflag) { 1830 usize = file_uncompress(file, outfile, sizeof(outfile)); 1831 #ifndef SMALL 1832 if (vflag && tflag) 1833 print_test(file, usize != -1); 1834 #endif 1835 if (usize == -1) 1836 return; 1837 gsize = sbp->st_size; 1838 } else { 1839 gsize = file_compress(file, outfile, sizeof(outfile)); 1840 if (gsize == -1) 1841 return; 1842 usize = sbp->st_size; 1843 } 1844 1845 1846 #ifndef SMALL 1847 if (vflag && !tflag) 1848 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 1849 #endif 1850 } 1851 1852 #ifndef SMALL 1853 /* this is used with -r to recursively descend directories */ 1854 static void 1855 handle_dir(char *dir) 1856 { 1857 char *path_argv[2]; 1858 FTS *fts; 1859 FTSENT *entry; 1860 1861 path_argv[0] = dir; 1862 path_argv[1] = 0; 1863 fts = fts_open(path_argv, FTS_PHYSICAL | FTS_NOCHDIR, NULL); 1864 if (fts == NULL) { 1865 warn("couldn't fts_open %s", dir); 1866 return; 1867 } 1868 1869 while ((entry = fts_read(fts))) { 1870 switch(entry->fts_info) { 1871 case FTS_D: 1872 case FTS_DP: 1873 continue; 1874 1875 case FTS_DNR: 1876 case FTS_ERR: 1877 case FTS_NS: 1878 maybe_warn("%s", entry->fts_path); 1879 continue; 1880 case FTS_F: 1881 handle_file(entry->fts_path, entry->fts_statp); 1882 } 1883 } 1884 (void)fts_close(fts); 1885 } 1886 #endif 1887 1888 /* print a ratio - size reduction as a fraction of uncompressed size */ 1889 static void 1890 print_ratio(off_t in, off_t out, FILE *where) 1891 { 1892 int percent10; /* 10 * percent */ 1893 off_t diff; 1894 char buff[8]; 1895 int len; 1896 1897 diff = in - out/2; 1898 if (diff <= 0) 1899 /* 1900 * Output is more than double size of input! print -99.9% 1901 * Quite possibly we've failed to get the original size. 1902 */ 1903 percent10 = -999; 1904 else { 1905 /* 1906 * We only need 12 bits of result from the final division, 1907 * so reduce the values until a 32bit division will suffice. 1908 */ 1909 while (in > 0x100000) { 1910 diff >>= 1; 1911 in >>= 1; 1912 } 1913 if (in != 0) 1914 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 1915 else 1916 percent10 = 0; 1917 } 1918 1919 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 1920 /* Move the '.' to before the last digit */ 1921 buff[len - 1] = buff[len - 2]; 1922 buff[len - 2] = '.'; 1923 fprintf(where, "%5s%%", buff); 1924 } 1925 1926 #ifndef SMALL 1927 /* print compression statistics, and the new name (if there is one!) */ 1928 static void 1929 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 1930 { 1931 if (file) 1932 fprintf(stderr, "%s:%s ", file, 1933 strlen(file) < 7 ? "\t\t" : "\t"); 1934 print_ratio(usize, gsize, stderr); 1935 if (nfile) 1936 fprintf(stderr, " -- replaced with %s", nfile); 1937 fprintf(stderr, "\n"); 1938 fflush(stderr); 1939 } 1940 1941 /* print test results */ 1942 static void 1943 print_test(const char *file, int ok) 1944 { 1945 1946 if (exit_value == 0 && ok == 0) 1947 exit_value = 1; 1948 fprintf(stderr, "%s:%s %s\n", file, 1949 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 1950 fflush(stderr); 1951 } 1952 #endif 1953 1954 /* print a file's info ala --list */ 1955 /* eg: 1956 compressed uncompressed ratio uncompressed_name 1957 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 1958 */ 1959 static void 1960 print_list(int fd, off_t out, const char *outfile, time_t ts) 1961 { 1962 static int first = 1; 1963 #ifndef SMALL 1964 static off_t in_tot, out_tot; 1965 uint32_t crc = 0; 1966 #endif 1967 off_t in = 0, rv; 1968 1969 if (first) { 1970 #ifndef SMALL 1971 if (vflag) 1972 printf("method crc date time "); 1973 #endif 1974 if (qflag == 0) 1975 printf(" compressed uncompressed " 1976 "ratio uncompressed_name\n"); 1977 } 1978 first = 0; 1979 1980 /* print totals? */ 1981 #ifndef SMALL 1982 if (fd == -1) { 1983 in = in_tot; 1984 out = out_tot; 1985 } else 1986 #endif 1987 { 1988 /* read the last 4 bytes - this is the uncompressed size */ 1989 rv = lseek(fd, (off_t)(-8), SEEK_END); 1990 if (rv != -1) { 1991 unsigned char buf[8]; 1992 uint32_t usize; 1993 1994 rv = read(fd, (char *)buf, sizeof(buf)); 1995 if (rv == -1) 1996 maybe_warn("read of uncompressed size"); 1997 else if (rv != sizeof(buf)) 1998 maybe_warnx("read of uncompressed size"); 1999 2000 else { 2001 usize = buf[4] | buf[5] << 8 | 2002 buf[6] << 16 | buf[7] << 24; 2003 in = (off_t)usize; 2004 #ifndef SMALL 2005 crc = buf[0] | buf[1] << 8 | 2006 buf[2] << 16 | buf[3] << 24; 2007 #endif 2008 } 2009 } 2010 } 2011 2012 #ifndef SMALL 2013 if (vflag && fd == -1) 2014 printf(" "); 2015 else if (vflag) { 2016 char *date = ctime(&ts); 2017 2018 /* skip the day, 1/100th second, and year */ 2019 date += 4; 2020 date[12] = 0; 2021 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 2022 } 2023 in_tot += in; 2024 out_tot += out; 2025 #else 2026 (void)&ts; /* XXX */ 2027 #endif 2028 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 2029 print_ratio(in, out, stdout); 2030 printf(" %s\n", outfile); 2031 } 2032 2033 /* display the usage of NetBSD gzip */ 2034 static void 2035 usage(void) 2036 { 2037 2038 fprintf(stderr, "%s\n", gzip_version); 2039 fprintf(stderr, 2040 #ifdef SMALL 2041 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n", 2042 #else 2043 "usage: %s [-123456789acdfhklLNnqrtVv] [-S .suffix] [<file> [<file> ...]]\n" 2044 " -1 --fast fastest (worst) compression\n" 2045 " -2 .. -8 set compression level\n" 2046 " -9 --best best (slowest) compression\n" 2047 " -c --stdout write to stdout, keep original files\n" 2048 " --to-stdout\n" 2049 " -d --decompress uncompress files\n" 2050 " --uncompress\n" 2051 " -f --force force overwriting & compress links\n" 2052 " -h --help display this help\n" 2053 " -k --keep don't delete input files during operation\n" 2054 " -l --list list compressed file contents\n" 2055 " -N --name save or restore original file name and time stamp\n" 2056 " -n --no-name don't save original file name or time stamp\n" 2057 " -q --quiet output no warnings\n" 2058 " -r --recursive recursively compress files in directories\n" 2059 " -S .suf use suffix .suf instead of .gz\n" 2060 " --suffix .suf\n" 2061 " -t --test test compressed file\n" 2062 " -V --version display program version\n" 2063 " -v --verbose print extra statistics\n", 2064 #endif 2065 getprogname()); 2066 exit(0); 2067 } 2068 2069 #ifndef SMALL 2070 /* display the license information of FreeBSD gzip */ 2071 static void 2072 display_license(void) 2073 { 2074 2075 fprintf(stderr, "%s (based on NetBSD gzip 20091011)\n", gzip_version); 2076 fprintf(stderr, "%s\n", gzip_copyright); 2077 exit(0); 2078 } 2079 #endif 2080 2081 /* display the version of NetBSD gzip */ 2082 static void 2083 display_version(void) 2084 { 2085 2086 fprintf(stderr, "%s\n", gzip_version); 2087 exit(0); 2088 } 2089 2090 #ifndef NO_BZIP2_SUPPORT 2091 #include "unbzip2.c" 2092 #endif 2093 #ifndef NO_COMPRESS_SUPPORT 2094 #include "zuncompress.c" 2095 #endif 2096 #ifndef NO_PACK_SUPPORT 2097 #include "unpack.c" 2098 #endif 2099 2100 static ssize_t 2101 read_retry(int fd, void *buf, size_t sz) 2102 { 2103 char *cp = buf; 2104 size_t left = MIN(sz, (size_t) SSIZE_MAX); 2105 2106 while (left > 0) { 2107 ssize_t ret; 2108 2109 ret = read(fd, cp, left); 2110 if (ret == -1) { 2111 return ret; 2112 } else if (ret == 0) { 2113 break; /* EOF */ 2114 } 2115 cp += ret; 2116 left -= ret; 2117 } 2118 2119 return sz - left; 2120 } 2121