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 case Z_STREAM_END: 920 case Z_OK: 921 break; 922 923 case Z_NEED_DICT: 924 maybe_warnx("Z_NEED_DICT error"); 925 goto stop_and_fail; 926 case Z_DATA_ERROR: 927 maybe_warnx("data stream error"); 928 goto stop_and_fail; 929 case Z_STREAM_ERROR: 930 maybe_warnx("internal stream error"); 931 goto stop_and_fail; 932 case Z_MEM_ERROR: 933 maybe_warnx("memory allocation error"); 934 goto stop_and_fail; 935 936 default: 937 maybe_warn("unknown error from inflate(): %d", 938 error); 939 } 940 wr = BUFLEN - z.avail_out; 941 942 if (wr != 0) { 943 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 944 if ( 945 #ifndef SMALL 946 /* don't write anything with -t */ 947 tflag == 0 && 948 #endif 949 write(out, outbufp, wr) != wr) { 950 maybe_warn("error writing to output"); 951 goto stop_and_fail; 952 } 953 954 out_tot += wr; 955 out_sub_tot += wr; 956 } 957 958 if (error == Z_STREAM_END) { 959 inflateEnd(&z); 960 state++; 961 } 962 963 z.next_out = (unsigned char *)outbufp; 964 z.avail_out = BUFLEN; 965 966 break; 967 case GZSTATE_CRC: 968 { 969 uLong origcrc; 970 971 if (z.avail_in < 4) { 972 if (!done_reading) { 973 needmore = 1; 974 continue; 975 } 976 maybe_warnx("truncated input"); 977 goto stop_and_fail; 978 } 979 origcrc = ((unsigned)z.next_in[0] & 0xff) | 980 ((unsigned)z.next_in[1] & 0xff) << 8 | 981 ((unsigned)z.next_in[2] & 0xff) << 16 | 982 ((unsigned)z.next_in[3] & 0xff) << 24; 983 if (origcrc != crc) { 984 maybe_warnx("invalid compressed" 985 " data--crc error"); 986 goto stop_and_fail; 987 } 988 } 989 990 z.avail_in -= 4; 991 z.next_in += 4; 992 993 if (!z.avail_in && done_reading) { 994 goto stop; 995 } 996 state++; 997 break; 998 case GZSTATE_LEN: 999 { 1000 uLong origlen; 1001 1002 if (z.avail_in < 4) { 1003 if (!done_reading) { 1004 needmore = 1; 1005 continue; 1006 } 1007 maybe_warnx("truncated input"); 1008 goto stop_and_fail; 1009 } 1010 origlen = ((unsigned)z.next_in[0] & 0xff) | 1011 ((unsigned)z.next_in[1] & 0xff) << 8 | 1012 ((unsigned)z.next_in[2] & 0xff) << 16 | 1013 ((unsigned)z.next_in[3] & 0xff) << 24; 1014 1015 if (origlen != out_sub_tot) { 1016 maybe_warnx("invalid compressed" 1017 " data--length error"); 1018 goto stop_and_fail; 1019 } 1020 } 1021 1022 z.avail_in -= 4; 1023 z.next_in += 4; 1024 1025 if (error < 0) { 1026 maybe_warnx("decompression error"); 1027 goto stop_and_fail; 1028 } 1029 state = GZSTATE_MAGIC0; 1030 break; 1031 } 1032 continue; 1033 stop_and_fail: 1034 out_tot = -1; 1035 stop: 1036 break; 1037 } 1038 if (state > GZSTATE_INIT) 1039 inflateEnd(&z); 1040 1041 free(inbufp); 1042 out1: 1043 free(outbufp); 1044 out2: 1045 if (gsizep) 1046 *gsizep = in_tot; 1047 return (out_tot); 1048 } 1049 1050 #ifndef SMALL 1051 /* 1052 * set the owner, mode, flags & utimes using the given file descriptor. 1053 * file is only used in possible warning messages. 1054 */ 1055 static void 1056 copymodes(int fd, const struct stat *sbp, const char *file) 1057 { 1058 struct timeval times[2]; 1059 struct stat sb; 1060 1061 /* 1062 * If we have no info on the input, give this file some 1063 * default values and return.. 1064 */ 1065 if (sbp == NULL) { 1066 mode_t mask = umask(022); 1067 1068 (void)fchmod(fd, DEFFILEMODE & ~mask); 1069 (void)umask(mask); 1070 return; 1071 } 1072 sb = *sbp; 1073 1074 /* if the chown fails, remove set-id bits as-per compress(1) */ 1075 if (fchown(fd, sb.st_uid, sb.st_gid) < 0) { 1076 if (errno != EPERM) 1077 maybe_warn("couldn't fchown: %s", file); 1078 sb.st_mode &= ~(S_ISUID|S_ISGID); 1079 } 1080 1081 /* we only allow set-id and the 9 normal permission bits */ 1082 sb.st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1083 if (fchmod(fd, sb.st_mode) < 0) 1084 maybe_warn("couldn't fchmod: %s", file); 1085 1086 TIMESPEC_TO_TIMEVAL(×[0], &sb.st_atim); 1087 TIMESPEC_TO_TIMEVAL(×[1], &sb.st_mtim); 1088 if (futimes(fd, times) < 0) 1089 maybe_warn("couldn't utimes: %s", file); 1090 1091 /* only try flags if they exist already */ 1092 if (sb.st_flags != 0 && fchflags(fd, sb.st_flags) < 0) 1093 maybe_warn("couldn't fchflags: %s", file); 1094 } 1095 #endif 1096 1097 /* what sort of file is this? */ 1098 static enum filetype 1099 file_gettype(u_char *buf) 1100 { 1101 1102 if (buf[0] == GZIP_MAGIC0 && 1103 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1104 return FT_GZIP; 1105 else 1106 #ifndef NO_BZIP2_SUPPORT 1107 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1108 buf[3] >= '0' && buf[3] <= '9') 1109 return FT_BZIP2; 1110 else 1111 #endif 1112 #ifndef NO_COMPRESS_SUPPORT 1113 if (memcmp(buf, Z_MAGIC, 2) == 0) 1114 return FT_Z; 1115 else 1116 #endif 1117 #ifndef NO_PACK_SUPPORT 1118 if (memcmp(buf, PACK_MAGIC, 2) == 0) 1119 return FT_PACK; 1120 else 1121 #endif 1122 return FT_UNKNOWN; 1123 } 1124 1125 #ifndef SMALL 1126 /* check the outfile is OK. */ 1127 static int 1128 check_outfile(const char *outfile) 1129 { 1130 struct stat sb; 1131 int ok = 1; 1132 1133 if (lflag == 0 && stat(outfile, &sb) == 0) { 1134 if (fflag) 1135 unlink(outfile); 1136 else if (isatty(STDIN_FILENO)) { 1137 char ans[10] = { 'n', '\0' }; /* default */ 1138 1139 fprintf(stderr, "%s already exists -- do you wish to " 1140 "overwrite (y or n)? " , outfile); 1141 (void)fgets(ans, sizeof(ans) - 1, stdin); 1142 if (ans[0] != 'y' && ans[0] != 'Y') { 1143 fprintf(stderr, "\tnot overwriting\n"); 1144 ok = 0; 1145 } else 1146 unlink(outfile); 1147 } else { 1148 maybe_warnx("%s already exists -- skipping", outfile); 1149 ok = 0; 1150 } 1151 } 1152 return ok; 1153 } 1154 1155 static void 1156 unlink_input(const char *file, const struct stat *sb) 1157 { 1158 struct stat nsb; 1159 1160 if (kflag) 1161 return; 1162 if (stat(file, &nsb) != 0) 1163 /* Must be gone alrady */ 1164 return; 1165 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1166 /* Definitely a different file */ 1167 return; 1168 unlink(file); 1169 } 1170 1171 static void 1172 sigint_handler(int signo __unused) 1173 { 1174 1175 if (remove_file != NULL) 1176 unlink(remove_file); 1177 _exit(2); 1178 } 1179 #endif 1180 1181 static const suffixes_t * 1182 check_suffix(char *file, int xlate) 1183 { 1184 const suffixes_t *s; 1185 int len = strlen(file); 1186 char *sp; 1187 1188 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1189 /* if it doesn't fit in "a.suf", don't bother */ 1190 if (s->ziplen >= len) 1191 continue; 1192 sp = file + len - s->ziplen; 1193 if (strcmp(s->zipped, sp) != 0) 1194 continue; 1195 if (xlate) 1196 strcpy(sp, s->normal); 1197 return s; 1198 } 1199 return NULL; 1200 } 1201 1202 /* 1203 * compress the given file: create a corresponding .gz file and remove the 1204 * original. 1205 */ 1206 static off_t 1207 file_compress(char *file, char *outfile, size_t outsize) 1208 { 1209 int in; 1210 int out; 1211 off_t size, insize; 1212 #ifndef SMALL 1213 struct stat isb, osb; 1214 const suffixes_t *suff; 1215 #endif 1216 1217 in = open(file, O_RDONLY); 1218 if (in == -1) { 1219 maybe_warn("can't open %s", file); 1220 return (-1); 1221 } 1222 1223 #ifndef SMALL 1224 if (fstat(in, &isb) != 0) { 1225 maybe_warn("couldn't stat: %s", file); 1226 close(in); 1227 return (-1); 1228 } 1229 #endif 1230 1231 if (cflag == 0) { 1232 #ifndef SMALL 1233 if (isb.st_nlink > 1 && fflag == 0) { 1234 maybe_warnx("%s has %d other link%s -- skipping", 1235 file, isb.st_nlink - 1, 1236 (isb.st_nlink - 1) == 1 ? "" : "s"); 1237 close(in); 1238 return (-1); 1239 } 1240 1241 if (fflag == 0 && (suff = check_suffix(file, 0)) && 1242 suff->zipped[0] != 0) { 1243 maybe_warnx("%s already has %s suffix -- unchanged", 1244 file, suff->zipped); 1245 close(in); 1246 return (-1); 1247 } 1248 #endif 1249 1250 /* Add (usually) .gz to filename */ 1251 if ((size_t)snprintf(outfile, outsize, "%s%s", 1252 file, suffixes[0].zipped) >= outsize) 1253 memcpy(outfile + outsize - suffixes[0].ziplen - 1, 1254 suffixes[0].zipped, suffixes[0].ziplen + 1); 1255 1256 #ifndef SMALL 1257 if (check_outfile(outfile) == 0) { 1258 close(in); 1259 return (-1); 1260 } 1261 #endif 1262 } 1263 1264 if (cflag == 0) { 1265 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600); 1266 if (out == -1) { 1267 maybe_warn("could not create output: %s", outfile); 1268 fclose(stdin); 1269 return (-1); 1270 } 1271 #ifndef SMALL 1272 remove_file = outfile; 1273 #endif 1274 } else 1275 out = STDOUT_FILENO; 1276 1277 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1278 1279 (void)close(in); 1280 1281 /* 1282 * If there was an error, insize will be -1. 1283 * If we compressed to stdout, just return the size. 1284 * Otherwise stat the file and check it is the correct size. 1285 * We only blow away the file if we can stat the output and it 1286 * has the expected size. 1287 */ 1288 if (cflag != 0) 1289 return (insize == -1 ? -1 : size); 1290 1291 #ifndef SMALL 1292 if (fstat(out, &osb) != 0) { 1293 maybe_warn("couldn't stat: %s", outfile); 1294 goto bad_outfile; 1295 } 1296 1297 if (osb.st_size != size) { 1298 maybe_warnx("output file: %s wrong size (%ju != %ju), deleting", 1299 outfile, (uintmax_t)osb.st_size, (uintmax_t)size); 1300 goto bad_outfile; 1301 } 1302 1303 copymodes(out, &isb, outfile); 1304 remove_file = NULL; 1305 #endif 1306 if (close(out) == -1) 1307 maybe_warn("couldn't close output"); 1308 1309 /* output is good, ok to delete input */ 1310 unlink_input(file, &isb); 1311 return (size); 1312 1313 #ifndef SMALL 1314 bad_outfile: 1315 if (close(out) == -1) 1316 maybe_warn("couldn't close output"); 1317 1318 maybe_warnx("leaving original %s", file); 1319 unlink(outfile); 1320 return (size); 1321 #endif 1322 } 1323 1324 /* uncompress the given file and remove the original */ 1325 static off_t 1326 file_uncompress(char *file, char *outfile, size_t outsize) 1327 { 1328 struct stat isb, osb; 1329 off_t size; 1330 ssize_t rbytes; 1331 unsigned char header1[4]; 1332 enum filetype method; 1333 int fd, ofd, zfd = -1; 1334 #ifndef SMALL 1335 ssize_t rv; 1336 time_t timestamp = 0; 1337 unsigned char name[PATH_MAX + 1]; 1338 #endif 1339 1340 /* gather the old name info */ 1341 1342 fd = open(file, O_RDONLY); 1343 if (fd < 0) { 1344 maybe_warn("can't open %s", file); 1345 goto lose; 1346 } 1347 1348 strlcpy(outfile, file, outsize); 1349 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1350 maybe_warnx("%s: unknown suffix -- ignored", file); 1351 goto lose; 1352 } 1353 1354 rbytes = read(fd, header1, sizeof header1); 1355 if (rbytes != sizeof header1) { 1356 /* we don't want to fail here. */ 1357 #ifndef SMALL 1358 if (fflag) 1359 goto lose; 1360 #endif 1361 if (rbytes == -1) 1362 maybe_warn("can't read %s", file); 1363 else 1364 goto unexpected_EOF; 1365 goto lose; 1366 } 1367 1368 method = file_gettype(header1); 1369 1370 #ifndef SMALL 1371 if (fflag == 0 && method == FT_UNKNOWN) { 1372 maybe_warnx("%s: not in gzip format", file); 1373 goto lose; 1374 } 1375 1376 #endif 1377 1378 #ifndef SMALL 1379 if (method == FT_GZIP && Nflag) { 1380 unsigned char ts[4]; /* timestamp */ 1381 1382 rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP); 1383 if (rv >= 0 && rv < (ssize_t)(sizeof ts)) 1384 goto unexpected_EOF; 1385 if (rv == -1) { 1386 if (!fflag) 1387 maybe_warn("can't read %s", file); 1388 goto lose; 1389 } 1390 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0]; 1391 1392 if (header1[3] & ORIG_NAME) { 1393 rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME); 1394 if (rbytes < 0) { 1395 maybe_warn("can't read %s", file); 1396 goto lose; 1397 } 1398 if (name[0] != 0) { 1399 /* preserve original directory name */ 1400 char *dp = strrchr(file, '/'); 1401 if (dp == NULL) 1402 dp = file; 1403 else 1404 dp++; 1405 snprintf(outfile, outsize, "%.*s%.*s", 1406 (int) (dp - file), 1407 file, (int) rbytes, name); 1408 } 1409 } 1410 } 1411 #endif 1412 lseek(fd, 0, SEEK_SET); 1413 1414 if (cflag == 0 || lflag) { 1415 if (fstat(fd, &isb) != 0) 1416 goto lose; 1417 #ifndef SMALL 1418 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1419 maybe_warnx("%s has %d other links -- skipping", 1420 file, isb.st_nlink - 1); 1421 goto lose; 1422 } 1423 if (nflag == 0 && timestamp) 1424 isb.st_mtime = timestamp; 1425 if (check_outfile(outfile) == 0) 1426 goto lose; 1427 #endif 1428 } 1429 1430 if (cflag == 0 && lflag == 0) { 1431 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1432 if (zfd == STDOUT_FILENO) { 1433 /* We won't close STDOUT_FILENO later... */ 1434 zfd = dup(zfd); 1435 close(STDOUT_FILENO); 1436 } 1437 if (zfd == -1) { 1438 maybe_warn("can't open %s", outfile); 1439 goto lose; 1440 } 1441 #ifndef SMALL 1442 remove_file = outfile; 1443 #endif 1444 } else 1445 zfd = STDOUT_FILENO; 1446 1447 #ifndef NO_BZIP2_SUPPORT 1448 if (method == FT_BZIP2) { 1449 1450 /* XXX */ 1451 if (lflag) { 1452 maybe_warnx("no -l with bzip2 files"); 1453 goto lose; 1454 } 1455 1456 size = unbzip2(fd, zfd, NULL, 0, NULL); 1457 } else 1458 #endif 1459 1460 #ifndef NO_COMPRESS_SUPPORT 1461 if (method == FT_Z) { 1462 FILE *in, *out; 1463 1464 /* XXX */ 1465 if (lflag) { 1466 maybe_warnx("no -l with Lempel-Ziv files"); 1467 goto lose; 1468 } 1469 1470 if ((in = zdopen(fd)) == NULL) { 1471 maybe_warn("zdopen for read: %s", file); 1472 goto lose; 1473 } 1474 1475 out = fdopen(dup(zfd), "w"); 1476 if (out == NULL) { 1477 maybe_warn("fdopen for write: %s", outfile); 1478 fclose(in); 1479 goto lose; 1480 } 1481 1482 size = zuncompress(in, out, NULL, 0, NULL); 1483 /* need to fclose() if ferror() is true... */ 1484 if (ferror(in) | fclose(in)) { 1485 maybe_warn("failed infile fclose"); 1486 unlink(outfile); 1487 (void)fclose(out); 1488 } 1489 if (fclose(out) != 0) { 1490 maybe_warn("failed outfile fclose"); 1491 unlink(outfile); 1492 goto lose; 1493 } 1494 } else 1495 #endif 1496 1497 #ifndef NO_PACK_SUPPORT 1498 if (method == FT_PACK) { 1499 if (lflag) { 1500 maybe_warnx("no -l with packed files"); 1501 goto lose; 1502 } 1503 1504 size = unpack(fd, zfd, NULL, 0, NULL); 1505 } else 1506 #endif 1507 1508 #ifndef SMALL 1509 if (method == FT_UNKNOWN) { 1510 if (lflag) { 1511 maybe_warnx("no -l for unknown filetypes"); 1512 goto lose; 1513 } 1514 size = cat_fd(NULL, 0, NULL, fd); 1515 } else 1516 #endif 1517 { 1518 if (lflag) { 1519 print_list(fd, isb.st_size, outfile, isb.st_mtime); 1520 close(fd); 1521 return -1; /* XXX */ 1522 } 1523 1524 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1525 } 1526 1527 if (close(fd) != 0) 1528 maybe_warn("couldn't close input"); 1529 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1530 maybe_warn("couldn't close output"); 1531 1532 if (size == -1) { 1533 if (cflag == 0) 1534 unlink(outfile); 1535 maybe_warnx("%s: uncompress failed", file); 1536 return -1; 1537 } 1538 1539 /* if testing, or we uncompressed to stdout, this is all we need */ 1540 #ifndef SMALL 1541 if (tflag) 1542 return size; 1543 #endif 1544 /* if we are uncompressing to stdin, don't remove the file. */ 1545 if (cflag) 1546 return size; 1547 1548 /* 1549 * if we create a file... 1550 */ 1551 /* 1552 * if we can't stat the file don't remove the file. 1553 */ 1554 1555 ofd = open(outfile, O_RDWR, 0); 1556 if (ofd == -1) { 1557 maybe_warn("couldn't open (leaving original): %s", 1558 outfile); 1559 return -1; 1560 } 1561 if (fstat(ofd, &osb) != 0) { 1562 maybe_warn("couldn't stat (leaving original): %s", 1563 outfile); 1564 close(ofd); 1565 return -1; 1566 } 1567 if (osb.st_size != size) { 1568 maybe_warnx("stat gave different size: %ju != %ju (leaving original)", 1569 (uintmax_t)size, (uintmax_t)osb.st_size); 1570 close(ofd); 1571 unlink(outfile); 1572 return -1; 1573 } 1574 #ifndef SMALL 1575 copymodes(ofd, &isb, outfile); 1576 remove_file = NULL; 1577 #endif 1578 close(ofd); 1579 unlink_input(file, &isb); 1580 return size; 1581 1582 unexpected_EOF: 1583 maybe_warnx("%s: unexpected end of file", file); 1584 lose: 1585 if (fd != -1) 1586 close(fd); 1587 if (zfd != -1 && zfd != STDOUT_FILENO) 1588 close(fd); 1589 return -1; 1590 } 1591 1592 #ifndef SMALL 1593 static off_t 1594 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd) 1595 { 1596 char buf[BUFLEN]; 1597 off_t in_tot; 1598 ssize_t w; 1599 1600 in_tot = count; 1601 w = write(STDOUT_FILENO, prepend, count); 1602 if (w == -1 || (size_t)w != count) { 1603 maybe_warn("write to stdout"); 1604 return -1; 1605 } 1606 for (;;) { 1607 ssize_t rv; 1608 1609 rv = read(fd, buf, sizeof buf); 1610 if (rv == 0) 1611 break; 1612 if (rv < 0) { 1613 maybe_warn("read from fd %d", fd); 1614 break; 1615 } 1616 1617 if (write(STDOUT_FILENO, buf, rv) != rv) { 1618 maybe_warn("write to stdout"); 1619 break; 1620 } 1621 in_tot += rv; 1622 } 1623 1624 if (gsizep) 1625 *gsizep = in_tot; 1626 return (in_tot); 1627 } 1628 #endif 1629 1630 static void 1631 handle_stdin(void) 1632 { 1633 unsigned char header1[4]; 1634 off_t usize, gsize; 1635 enum filetype method; 1636 ssize_t bytes_read; 1637 #ifndef NO_COMPRESS_SUPPORT 1638 FILE *in; 1639 #endif 1640 1641 #ifndef SMALL 1642 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1643 maybe_warnx("standard input is a terminal -- ignoring"); 1644 return; 1645 } 1646 #endif 1647 1648 if (lflag) { 1649 struct stat isb; 1650 1651 /* XXX could read the whole file, etc. */ 1652 if (fstat(STDIN_FILENO, &isb) < 0) { 1653 maybe_warn("fstat"); 1654 return; 1655 } 1656 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime); 1657 return; 1658 } 1659 1660 bytes_read = read_retry(STDIN_FILENO, header1, sizeof header1); 1661 if (bytes_read == -1) { 1662 maybe_warn("can't read stdin"); 1663 return; 1664 } else if (bytes_read != sizeof(header1)) { 1665 maybe_warnx("(stdin): unexpected end of file"); 1666 return; 1667 } 1668 1669 method = file_gettype(header1); 1670 switch (method) { 1671 default: 1672 #ifndef SMALL 1673 if (fflag == 0) { 1674 maybe_warnx("unknown compression format"); 1675 return; 1676 } 1677 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO); 1678 break; 1679 #endif 1680 case FT_GZIP: 1681 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1682 (char *)header1, sizeof header1, &gsize, "(stdin)"); 1683 break; 1684 #ifndef NO_BZIP2_SUPPORT 1685 case FT_BZIP2: 1686 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1687 (char *)header1, sizeof header1, &gsize); 1688 break; 1689 #endif 1690 #ifndef NO_COMPRESS_SUPPORT 1691 case FT_Z: 1692 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1693 maybe_warnx("zopen of stdin"); 1694 return; 1695 } 1696 1697 usize = zuncompress(in, stdout, (char *)header1, sizeof header1, &gsize); 1698 fclose(in); 1699 break; 1700 #endif 1701 #ifndef NO_PACK_SUPPORT 1702 case FT_PACK: 1703 usize = unpack(STDIN_FILENO, STDOUT_FILENO, 1704 (char *)header1, sizeof header1, &gsize); 1705 break; 1706 #endif 1707 } 1708 1709 #ifndef SMALL 1710 if (vflag && !tflag && usize != -1 && gsize != -1) 1711 print_verbage(NULL, NULL, usize, gsize); 1712 if (vflag && tflag) 1713 print_test("(stdin)", usize != -1); 1714 #endif 1715 1716 } 1717 1718 static void 1719 handle_stdout(void) 1720 { 1721 off_t gsize, usize; 1722 struct stat sb; 1723 time_t systime; 1724 uint32_t mtime; 1725 int ret; 1726 1727 #ifndef SMALL 1728 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1729 maybe_warnx("standard output is a terminal -- ignoring"); 1730 return; 1731 } 1732 #endif 1733 /* If stdin is a file use it's mtime, otherwise use current time */ 1734 ret = fstat(STDIN_FILENO, &sb); 1735 1736 #ifndef SMALL 1737 if (ret < 0) { 1738 maybe_warn("Can't stat stdin"); 1739 return; 1740 } 1741 #endif 1742 1743 if (S_ISREG(sb.st_mode)) 1744 mtime = (uint32_t)sb.st_mtime; 1745 else { 1746 systime = time(NULL); 1747 #ifndef SMALL 1748 if (systime == -1) { 1749 maybe_warn("time"); 1750 return; 1751 } 1752 #endif 1753 mtime = (uint32_t)systime; 1754 } 1755 1756 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime); 1757 #ifndef SMALL 1758 if (vflag && !tflag && usize != -1 && gsize != -1) 1759 print_verbage(NULL, NULL, usize, gsize); 1760 #endif 1761 } 1762 1763 /* do what is asked for, for the path name */ 1764 static void 1765 handle_pathname(char *path) 1766 { 1767 char *opath = path, *s = NULL; 1768 ssize_t len; 1769 int slen; 1770 struct stat sb; 1771 1772 /* check for stdout/stdin */ 1773 if (path[0] == '-' && path[1] == '\0') { 1774 if (dflag) 1775 handle_stdin(); 1776 else 1777 handle_stdout(); 1778 return; 1779 } 1780 1781 retry: 1782 if (stat(path, &sb) != 0) { 1783 /* lets try <path>.gz if we're decompressing */ 1784 if (dflag && s == NULL && errno == ENOENT) { 1785 len = strlen(path); 1786 slen = suffixes[0].ziplen; 1787 s = malloc(len + slen + 1); 1788 if (s == NULL) 1789 maybe_err("malloc"); 1790 memcpy(s, path, len); 1791 memcpy(s + len, suffixes[0].zipped, slen + 1); 1792 path = s; 1793 goto retry; 1794 } 1795 maybe_warn("can't stat: %s", opath); 1796 goto out; 1797 } 1798 1799 if (S_ISDIR(sb.st_mode)) { 1800 #ifndef SMALL 1801 if (rflag) 1802 handle_dir(path); 1803 else 1804 #endif 1805 maybe_warnx("%s is a directory", path); 1806 goto out; 1807 } 1808 1809 if (S_ISREG(sb.st_mode)) 1810 handle_file(path, &sb); 1811 else 1812 maybe_warnx("%s is not a regular file", path); 1813 1814 out: 1815 if (s) 1816 free(s); 1817 } 1818 1819 /* compress/decompress a file */ 1820 static void 1821 handle_file(char *file, struct stat *sbp) 1822 { 1823 off_t usize, gsize; 1824 char outfile[PATH_MAX]; 1825 1826 infile = file; 1827 if (dflag) { 1828 usize = file_uncompress(file, outfile, sizeof(outfile)); 1829 #ifndef SMALL 1830 if (vflag && tflag) 1831 print_test(file, usize != -1); 1832 #endif 1833 if (usize == -1) 1834 return; 1835 gsize = sbp->st_size; 1836 } else { 1837 gsize = file_compress(file, outfile, sizeof(outfile)); 1838 if (gsize == -1) 1839 return; 1840 usize = sbp->st_size; 1841 } 1842 1843 1844 #ifndef SMALL 1845 if (vflag && !tflag) 1846 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 1847 #endif 1848 } 1849 1850 #ifndef SMALL 1851 /* this is used with -r to recursively descend directories */ 1852 static void 1853 handle_dir(char *dir) 1854 { 1855 char *path_argv[2]; 1856 FTS *fts; 1857 FTSENT *entry; 1858 1859 path_argv[0] = dir; 1860 path_argv[1] = 0; 1861 fts = fts_open(path_argv, FTS_PHYSICAL | FTS_NOCHDIR, NULL); 1862 if (fts == NULL) { 1863 warn("couldn't fts_open %s", dir); 1864 return; 1865 } 1866 1867 while ((entry = fts_read(fts))) { 1868 switch(entry->fts_info) { 1869 case FTS_D: 1870 case FTS_DP: 1871 continue; 1872 1873 case FTS_DNR: 1874 case FTS_ERR: 1875 case FTS_NS: 1876 maybe_warn("%s", entry->fts_path); 1877 continue; 1878 case FTS_F: 1879 handle_file(entry->fts_path, entry->fts_statp); 1880 } 1881 } 1882 (void)fts_close(fts); 1883 } 1884 #endif 1885 1886 /* print a ratio - size reduction as a fraction of uncompressed size */ 1887 static void 1888 print_ratio(off_t in, off_t out, FILE *where) 1889 { 1890 int percent10; /* 10 * percent */ 1891 off_t diff; 1892 char buff[8]; 1893 int len; 1894 1895 diff = in - out/2; 1896 if (diff <= 0) 1897 /* 1898 * Output is more than double size of input! print -99.9% 1899 * Quite possibly we've failed to get the original size. 1900 */ 1901 percent10 = -999; 1902 else { 1903 /* 1904 * We only need 12 bits of result from the final division, 1905 * so reduce the values until a 32bit division will suffice. 1906 */ 1907 while (in > 0x100000) { 1908 diff >>= 1; 1909 in >>= 1; 1910 } 1911 if (in != 0) 1912 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 1913 else 1914 percent10 = 0; 1915 } 1916 1917 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 1918 /* Move the '.' to before the last digit */ 1919 buff[len - 1] = buff[len - 2]; 1920 buff[len - 2] = '.'; 1921 fprintf(where, "%5s%%", buff); 1922 } 1923 1924 #ifndef SMALL 1925 /* print compression statistics, and the new name (if there is one!) */ 1926 static void 1927 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 1928 { 1929 if (file) 1930 fprintf(stderr, "%s:%s ", file, 1931 strlen(file) < 7 ? "\t\t" : "\t"); 1932 print_ratio(usize, gsize, stderr); 1933 if (nfile) 1934 fprintf(stderr, " -- replaced with %s", nfile); 1935 fprintf(stderr, "\n"); 1936 fflush(stderr); 1937 } 1938 1939 /* print test results */ 1940 static void 1941 print_test(const char *file, int ok) 1942 { 1943 1944 if (exit_value == 0 && ok == 0) 1945 exit_value = 1; 1946 fprintf(stderr, "%s:%s %s\n", file, 1947 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 1948 fflush(stderr); 1949 } 1950 #endif 1951 1952 /* print a file's info ala --list */ 1953 /* eg: 1954 compressed uncompressed ratio uncompressed_name 1955 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 1956 */ 1957 static void 1958 print_list(int fd, off_t out, const char *outfile, time_t ts) 1959 { 1960 static int first = 1; 1961 #ifndef SMALL 1962 static off_t in_tot, out_tot; 1963 uint32_t crc = 0; 1964 #endif 1965 off_t in = 0, rv; 1966 1967 if (first) { 1968 #ifndef SMALL 1969 if (vflag) 1970 printf("method crc date time "); 1971 #endif 1972 if (qflag == 0) 1973 printf(" compressed uncompressed " 1974 "ratio uncompressed_name\n"); 1975 } 1976 first = 0; 1977 1978 /* print totals? */ 1979 #ifndef SMALL 1980 if (fd == -1) { 1981 in = in_tot; 1982 out = out_tot; 1983 } else 1984 #endif 1985 { 1986 /* read the last 4 bytes - this is the uncompressed size */ 1987 rv = lseek(fd, (off_t)(-8), SEEK_END); 1988 if (rv != -1) { 1989 unsigned char buf[8]; 1990 uint32_t usize; 1991 1992 rv = read(fd, (char *)buf, sizeof(buf)); 1993 if (rv == -1) 1994 maybe_warn("read of uncompressed size"); 1995 else if (rv != sizeof(buf)) 1996 maybe_warnx("read of uncompressed size"); 1997 1998 else { 1999 usize = buf[4] | buf[5] << 8 | 2000 buf[6] << 16 | buf[7] << 24; 2001 in = (off_t)usize; 2002 #ifndef SMALL 2003 crc = buf[0] | buf[1] << 8 | 2004 buf[2] << 16 | buf[3] << 24; 2005 #endif 2006 } 2007 } 2008 } 2009 2010 #ifndef SMALL 2011 if (vflag && fd == -1) 2012 printf(" "); 2013 else if (vflag) { 2014 char *date = ctime(&ts); 2015 2016 /* skip the day, 1/100th second, and year */ 2017 date += 4; 2018 date[12] = 0; 2019 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 2020 } 2021 in_tot += in; 2022 out_tot += out; 2023 #else 2024 (void)&ts; /* XXX */ 2025 #endif 2026 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 2027 print_ratio(in, out, stdout); 2028 printf(" %s\n", outfile); 2029 } 2030 2031 /* display the usage of NetBSD gzip */ 2032 static void 2033 usage(void) 2034 { 2035 2036 fprintf(stderr, "%s\n", gzip_version); 2037 fprintf(stderr, 2038 #ifdef SMALL 2039 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n", 2040 #else 2041 "usage: %s [-123456789acdfhklLNnqrtVv] [-S .suffix] [<file> [<file> ...]]\n" 2042 " -1 --fast fastest (worst) compression\n" 2043 " -2 .. -8 set compression level\n" 2044 " -9 --best best (slowest) compression\n" 2045 " -c --stdout write to stdout, keep original files\n" 2046 " --to-stdout\n" 2047 " -d --decompress uncompress files\n" 2048 " --uncompress\n" 2049 " -f --force force overwriting & compress links\n" 2050 " -h --help display this help\n" 2051 " -k --keep don't delete input files during operation\n" 2052 " -l --list list compressed file contents\n" 2053 " -N --name save or restore original file name and time stamp\n" 2054 " -n --no-name don't save original file name or time stamp\n" 2055 " -q --quiet output no warnings\n" 2056 " -r --recursive recursively compress files in directories\n" 2057 " -S .suf use suffix .suf instead of .gz\n" 2058 " --suffix .suf\n" 2059 " -t --test test compressed file\n" 2060 " -V --version display program version\n" 2061 " -v --verbose print extra statistics\n", 2062 #endif 2063 getprogname()); 2064 exit(0); 2065 } 2066 2067 #ifndef SMALL 2068 /* display the license information of FreeBSD gzip */ 2069 static void 2070 display_license(void) 2071 { 2072 2073 fprintf(stderr, "%s (based on NetBSD gzip 20091011)\n", gzip_version); 2074 fprintf(stderr, "%s\n", gzip_copyright); 2075 exit(0); 2076 } 2077 #endif 2078 2079 /* display the version of NetBSD gzip */ 2080 static void 2081 display_version(void) 2082 { 2083 2084 fprintf(stderr, "%s\n", gzip_version); 2085 exit(0); 2086 } 2087 2088 #ifndef NO_BZIP2_SUPPORT 2089 #include "unbzip2.c" 2090 #endif 2091 #ifndef NO_COMPRESS_SUPPORT 2092 #include "zuncompress.c" 2093 #endif 2094 #ifndef NO_PACK_SUPPORT 2095 #include "unpack.c" 2096 #endif 2097 2098 static ssize_t 2099 read_retry(int fd, void *buf, size_t sz) 2100 { 2101 char *cp = buf; 2102 size_t left = MIN(sz, (size_t) SSIZE_MAX); 2103 2104 while (left > 0) { 2105 ssize_t ret; 2106 2107 ret = read(fd, cp, left); 2108 if (ret == -1) { 2109 return ret; 2110 } else if (ret == 0) { 2111 break; /* EOF */ 2112 } 2113 cp += ret; 2114 left -= ret; 2115 } 2116 2117 return sz - left; 2118 } 2119