1 /* $NetBSD: gzip.c,v 1.109 2015/10/27 07:36:18 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 __FBSDID("$FreeBSD$"); 35 #endif /* not lint */ 36 37 /* 38 * gzip.c -- GPL free gzip using zlib. 39 * 40 * RFC 1950 covers the zlib format 41 * RFC 1951 covers the deflate format 42 * RFC 1952 covers the gzip format 43 * 44 * TODO: 45 * - use mmap where possible 46 * - make bzip2/compress -v/-t/-l support work as well as possible 47 */ 48 49 #include <sys/param.h> 50 #include <sys/stat.h> 51 #include <sys/time.h> 52 53 #include <inttypes.h> 54 #include <unistd.h> 55 #include <stdio.h> 56 #include <string.h> 57 #include <stdlib.h> 58 #include <err.h> 59 #include <errno.h> 60 #include <fcntl.h> 61 #include <zlib.h> 62 #include <fts.h> 63 #include <libgen.h> 64 #include <stdarg.h> 65 #include <getopt.h> 66 #include <time.h> 67 68 /* what type of file are we dealing with */ 69 enum filetype { 70 FT_GZIP, 71 #ifndef NO_BZIP2_SUPPORT 72 FT_BZIP2, 73 #endif 74 #ifndef NO_COMPRESS_SUPPORT 75 FT_Z, 76 #endif 77 #ifndef NO_PACK_SUPPORT 78 FT_PACK, 79 #endif 80 #ifndef NO_XZ_SUPPORT 81 FT_XZ, 82 #endif 83 FT_LAST, 84 FT_UNKNOWN 85 }; 86 87 #ifndef NO_BZIP2_SUPPORT 88 #include <bzlib.h> 89 90 #define BZ2_SUFFIX ".bz2" 91 #define BZIP2_MAGIC "BZh" 92 #endif 93 94 #ifndef NO_COMPRESS_SUPPORT 95 #define Z_SUFFIX ".Z" 96 #define Z_MAGIC "\037\235" 97 #endif 98 99 #ifndef NO_PACK_SUPPORT 100 #define PACK_MAGIC "\037\036" 101 #endif 102 103 #ifndef NO_XZ_SUPPORT 104 #include <lzma.h> 105 #define XZ_SUFFIX ".xz" 106 #define XZ_MAGIC "\3757zXZ" 107 #endif 108 109 #define GZ_SUFFIX ".gz" 110 111 #define BUFLEN (64 * 1024) 112 113 #define GZIP_MAGIC0 0x1F 114 #define GZIP_MAGIC1 0x8B 115 #define GZIP_OMAGIC1 0x9E 116 117 #define GZIP_TIMESTAMP (off_t)4 118 #define GZIP_ORIGNAME (off_t)10 119 120 #define HEAD_CRC 0x02 121 #define EXTRA_FIELD 0x04 122 #define ORIG_NAME 0x08 123 #define COMMENT 0x10 124 125 #define OS_CODE 3 /* Unix */ 126 127 typedef struct { 128 const char *zipped; 129 int ziplen; 130 const char *normal; /* for unzip - must not be longer than zipped */ 131 } suffixes_t; 132 static suffixes_t suffixes[] = { 133 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N} 134 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */ 135 #ifndef SMALL 136 SUFFIX(GZ_SUFFIX, ""), 137 SUFFIX(".z", ""), 138 SUFFIX("-gz", ""), 139 SUFFIX("-z", ""), 140 SUFFIX("_z", ""), 141 SUFFIX(".taz", ".tar"), 142 SUFFIX(".tgz", ".tar"), 143 #ifndef NO_BZIP2_SUPPORT 144 SUFFIX(BZ2_SUFFIX, ""), 145 SUFFIX(".tbz", ".tar"), 146 SUFFIX(".tbz2", ".tar"), 147 #endif 148 #ifndef NO_COMPRESS_SUPPORT 149 SUFFIX(Z_SUFFIX, ""), 150 #endif 151 #ifndef NO_XZ_SUPPORT 152 SUFFIX(XZ_SUFFIX, ""), 153 #endif 154 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */ 155 #endif /* SMALL */ 156 #undef SUFFIX 157 }; 158 #define NUM_SUFFIXES (nitems(suffixes)) 159 #define SUFFIX_MAXLEN 30 160 161 static const char gzip_version[] = "FreeBSD gzip 20150413"; 162 163 #ifndef SMALL 164 static const char gzip_copyright[] = \ 165 " Copyright (c) 1997, 1998, 2003, 2004, 2006 Matthew R. Green\n" 166 " All rights reserved.\n" 167 "\n" 168 " Redistribution and use in source and binary forms, with or without\n" 169 " modification, are permitted provided that the following conditions\n" 170 " are met:\n" 171 " 1. Redistributions of source code must retain the above copyright\n" 172 " notice, this list of conditions and the following disclaimer.\n" 173 " 2. Redistributions in binary form must reproduce the above copyright\n" 174 " notice, this list of conditions and the following disclaimer in the\n" 175 " documentation and/or other materials provided with the distribution.\n" 176 "\n" 177 " THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR\n" 178 " IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES\n" 179 " OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.\n" 180 " IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,\n" 181 " INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,\n" 182 " BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\n" 183 " LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED\n" 184 " AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,\n" 185 " OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\n" 186 " OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\n" 187 " SUCH DAMAGE."; 188 #endif 189 190 static int cflag; /* stdout mode */ 191 static int dflag; /* decompress mode */ 192 static int lflag; /* list mode */ 193 static int numflag = 6; /* gzip -1..-9 value */ 194 195 #ifndef SMALL 196 static int fflag; /* force mode */ 197 static int kflag; /* don't delete input files */ 198 static int nflag; /* don't save name/timestamp */ 199 static int Nflag; /* don't restore name/timestamp */ 200 static int qflag; /* quiet mode */ 201 static int rflag; /* recursive mode */ 202 static int tflag; /* test */ 203 static int vflag; /* verbose mode */ 204 static const char *remove_file = NULL; /* file to be removed upon SIGINT */ 205 #else 206 #define qflag 0 207 #define tflag 0 208 #endif 209 210 static int exit_value = 0; /* exit value */ 211 212 static char *infile; /* name of file coming in */ 213 214 static void maybe_err(const char *fmt, ...) __printflike(1, 2) __dead2; 215 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \ 216 !defined(NO_XZ_SUPPORT) 217 static void maybe_errx(const char *fmt, ...) __printflike(1, 2) __dead2; 218 #endif 219 static void maybe_warn(const char *fmt, ...) __printflike(1, 2); 220 static void maybe_warnx(const char *fmt, ...) __printflike(1, 2); 221 static enum filetype file_gettype(u_char *); 222 #ifdef SMALL 223 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz) 224 #endif 225 static off_t gz_compress(int, int, off_t *, const char *, uint32_t); 226 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *); 227 static off_t file_compress(char *, char *, size_t); 228 static off_t file_uncompress(char *, char *, size_t); 229 static void handle_pathname(char *); 230 static void handle_file(char *, struct stat *); 231 static void handle_stdin(void); 232 static void handle_stdout(void); 233 static void print_ratio(off_t, off_t, FILE *); 234 static void print_list(int fd, off_t, const char *, time_t); 235 static void usage(void) __dead2; 236 static void display_version(void) __dead2; 237 #ifndef SMALL 238 static void display_license(void); 239 static void sigint_handler(int); 240 #endif 241 static const suffixes_t *check_suffix(char *, int); 242 static ssize_t read_retry(int, void *, size_t); 243 244 #ifdef SMALL 245 #define unlink_input(f, sb) unlink(f) 246 #else 247 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd); 248 static void prepend_gzip(char *, int *, char ***); 249 static void handle_dir(char *); 250 static void print_verbage(const char *, const char *, off_t, off_t); 251 static void print_test(const char *, int); 252 static void copymodes(int fd, const struct stat *, const char *file); 253 static int check_outfile(const char *outfile); 254 #endif 255 256 #ifndef NO_BZIP2_SUPPORT 257 static off_t unbzip2(int, int, char *, size_t, off_t *); 258 #endif 259 260 #ifndef NO_COMPRESS_SUPPORT 261 static FILE *zdopen(int); 262 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *); 263 #endif 264 265 #ifndef NO_PACK_SUPPORT 266 static off_t unpack(int, int, char *, size_t, off_t *); 267 #endif 268 269 #ifndef NO_XZ_SUPPORT 270 static off_t unxz(int, int, char *, size_t, off_t *); 271 #endif 272 273 #ifdef SMALL 274 #define getopt_long(a,b,c,d,e) getopt(a,b,c) 275 #else 276 static const struct option longopts[] = { 277 { "stdout", no_argument, 0, 'c' }, 278 { "to-stdout", no_argument, 0, 'c' }, 279 { "decompress", no_argument, 0, 'd' }, 280 { "uncompress", no_argument, 0, 'd' }, 281 { "force", no_argument, 0, 'f' }, 282 { "help", no_argument, 0, 'h' }, 283 { "keep", no_argument, 0, 'k' }, 284 { "list", no_argument, 0, 'l' }, 285 { "no-name", no_argument, 0, 'n' }, 286 { "name", no_argument, 0, 'N' }, 287 { "quiet", no_argument, 0, 'q' }, 288 { "recursive", no_argument, 0, 'r' }, 289 { "suffix", required_argument, 0, 'S' }, 290 { "test", no_argument, 0, 't' }, 291 { "verbose", no_argument, 0, 'v' }, 292 { "version", no_argument, 0, 'V' }, 293 { "fast", no_argument, 0, '1' }, 294 { "best", no_argument, 0, '9' }, 295 { "ascii", no_argument, 0, 'a' }, 296 { "license", no_argument, 0, 'L' }, 297 { NULL, no_argument, 0, 0 }, 298 }; 299 #endif 300 301 int 302 main(int argc, char **argv) 303 { 304 const char *progname = getprogname(); 305 #ifndef SMALL 306 char *gzip; 307 int len; 308 #endif 309 int ch; 310 311 #ifndef SMALL 312 if ((gzip = getenv("GZIP")) != NULL) 313 prepend_gzip(gzip, &argc, &argv); 314 signal(SIGINT, sigint_handler); 315 #endif 316 317 /* 318 * XXX 319 * handle being called `gunzip', `zcat' and `gzcat' 320 */ 321 if (strcmp(progname, "gunzip") == 0) 322 dflag = 1; 323 else if (strcmp(progname, "zcat") == 0 || 324 strcmp(progname, "gzcat") == 0) 325 dflag = cflag = 1; 326 327 #ifdef SMALL 328 #define OPT_LIST "123456789cdhlV" 329 #else 330 #define OPT_LIST "123456789acdfhklLNnqrS:tVv" 331 #endif 332 333 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) { 334 switch (ch) { 335 case '1': case '2': case '3': 336 case '4': case '5': case '6': 337 case '7': case '8': case '9': 338 numflag = ch - '0'; 339 break; 340 case 'c': 341 cflag = 1; 342 break; 343 case 'd': 344 dflag = 1; 345 break; 346 case 'l': 347 lflag = 1; 348 dflag = 1; 349 break; 350 case 'V': 351 display_version(); 352 /* NOTREACHED */ 353 #ifndef SMALL 354 case 'a': 355 fprintf(stderr, "%s: option --ascii ignored on this system\n", progname); 356 break; 357 case 'f': 358 fflag = 1; 359 break; 360 case 'k': 361 kflag = 1; 362 break; 363 case 'L': 364 display_license(); 365 /* NOT REACHED */ 366 case 'N': 367 nflag = 0; 368 Nflag = 1; 369 break; 370 case 'n': 371 nflag = 1; 372 Nflag = 0; 373 break; 374 case 'q': 375 qflag = 1; 376 break; 377 case 'r': 378 rflag = 1; 379 break; 380 case 'S': 381 len = strlen(optarg); 382 if (len != 0) { 383 if (len > SUFFIX_MAXLEN) 384 errx(1, "incorrect suffix: '%s': too long", optarg); 385 suffixes[0].zipped = optarg; 386 suffixes[0].ziplen = len; 387 } else { 388 suffixes[NUM_SUFFIXES - 1].zipped = ""; 389 suffixes[NUM_SUFFIXES - 1].ziplen = 0; 390 } 391 break; 392 case 't': 393 cflag = 1; 394 tflag = 1; 395 dflag = 1; 396 break; 397 case 'v': 398 vflag = 1; 399 break; 400 #endif 401 default: 402 usage(); 403 /* NOTREACHED */ 404 } 405 } 406 argv += optind; 407 argc -= optind; 408 409 if (argc == 0) { 410 if (dflag) /* stdin mode */ 411 handle_stdin(); 412 else /* stdout mode */ 413 handle_stdout(); 414 } else { 415 do { 416 handle_pathname(argv[0]); 417 } while (*++argv); 418 } 419 #ifndef SMALL 420 if (qflag == 0 && lflag && argc > 1) 421 print_list(-1, 0, "(totals)", 0); 422 #endif 423 exit(exit_value); 424 } 425 426 /* maybe print a warning */ 427 void 428 maybe_warn(const char *fmt, ...) 429 { 430 va_list ap; 431 432 if (qflag == 0) { 433 va_start(ap, fmt); 434 vwarn(fmt, ap); 435 va_end(ap); 436 } 437 if (exit_value == 0) 438 exit_value = 1; 439 } 440 441 /* ... without an errno. */ 442 void 443 maybe_warnx(const char *fmt, ...) 444 { 445 va_list ap; 446 447 if (qflag == 0) { 448 va_start(ap, fmt); 449 vwarnx(fmt, ap); 450 va_end(ap); 451 } 452 if (exit_value == 0) 453 exit_value = 1; 454 } 455 456 /* maybe print an error */ 457 void 458 maybe_err(const char *fmt, ...) 459 { 460 va_list ap; 461 462 if (qflag == 0) { 463 va_start(ap, fmt); 464 vwarn(fmt, ap); 465 va_end(ap); 466 } 467 exit(2); 468 } 469 470 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \ 471 !defined(NO_XZ_SUPPORT) 472 /* ... without an errno. */ 473 void 474 maybe_errx(const char *fmt, ...) 475 { 476 va_list ap; 477 478 if (qflag == 0) { 479 va_start(ap, fmt); 480 vwarnx(fmt, ap); 481 va_end(ap); 482 } 483 exit(2); 484 } 485 #endif 486 487 #ifndef SMALL 488 /* split up $GZIP and prepend it to the argument list */ 489 static void 490 prepend_gzip(char *gzip, int *argc, char ***argv) 491 { 492 char *s, **nargv, **ac; 493 int nenvarg = 0, i; 494 495 /* scan how many arguments there are */ 496 for (s = gzip;;) { 497 while (*s == ' ' || *s == '\t') 498 s++; 499 if (*s == 0) 500 goto count_done; 501 nenvarg++; 502 while (*s != ' ' && *s != '\t') 503 if (*s++ == 0) 504 goto count_done; 505 } 506 count_done: 507 /* punt early */ 508 if (nenvarg == 0) 509 return; 510 511 *argc += nenvarg; 512 ac = *argv; 513 514 nargv = (char **)malloc((*argc + 1) * sizeof(char *)); 515 if (nargv == NULL) 516 maybe_err("malloc"); 517 518 /* stash this away */ 519 *argv = nargv; 520 521 /* copy the program name first */ 522 i = 0; 523 nargv[i++] = *(ac++); 524 525 /* take a copy of $GZIP and add it to the array */ 526 s = strdup(gzip); 527 if (s == NULL) 528 maybe_err("strdup"); 529 for (;;) { 530 /* Skip whitespaces. */ 531 while (*s == ' ' || *s == '\t') 532 s++; 533 if (*s == 0) 534 goto copy_done; 535 nargv[i++] = s; 536 /* Find the end of this argument. */ 537 while (*s != ' ' && *s != '\t') 538 if (*s++ == 0) 539 /* Argument followed by NUL. */ 540 goto copy_done; 541 /* Terminate by overwriting ' ' or '\t' with NUL. */ 542 *s++ = 0; 543 } 544 copy_done: 545 546 /* copy the original arguments and a NULL */ 547 while (*ac) 548 nargv[i++] = *(ac++); 549 nargv[i] = NULL; 550 } 551 #endif 552 553 /* compress input to output. Return bytes read, -1 on error */ 554 static off_t 555 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime) 556 { 557 z_stream z; 558 char *outbufp, *inbufp; 559 off_t in_tot = 0, out_tot = 0; 560 ssize_t in_size; 561 int i, error; 562 uLong crc; 563 #ifdef SMALL 564 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0, 565 0, 0, 0, 0, 566 0, OS_CODE }; 567 #endif 568 569 outbufp = malloc(BUFLEN); 570 inbufp = malloc(BUFLEN); 571 if (outbufp == NULL || inbufp == NULL) { 572 maybe_err("malloc failed"); 573 goto out; 574 } 575 576 memset(&z, 0, sizeof z); 577 z.zalloc = Z_NULL; 578 z.zfree = Z_NULL; 579 z.opaque = 0; 580 581 #ifdef SMALL 582 memcpy(outbufp, header, sizeof header); 583 i = sizeof header; 584 #else 585 if (nflag != 0) { 586 mtime = 0; 587 origname = ""; 588 } 589 590 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s", 591 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 592 *origname ? ORIG_NAME : 0, 593 mtime & 0xff, 594 (mtime >> 8) & 0xff, 595 (mtime >> 16) & 0xff, 596 (mtime >> 24) & 0xff, 597 numflag == 1 ? 4 : numflag == 9 ? 2 : 0, 598 OS_CODE, origname); 599 if (i >= BUFLEN) 600 /* this need PATH_MAX > BUFLEN ... */ 601 maybe_err("snprintf"); 602 if (*origname) 603 i++; 604 #endif 605 606 z.next_out = (unsigned char *)outbufp + i; 607 z.avail_out = BUFLEN - i; 608 609 error = deflateInit2(&z, numflag, Z_DEFLATED, 610 (-MAX_WBITS), 8, Z_DEFAULT_STRATEGY); 611 if (error != Z_OK) { 612 maybe_warnx("deflateInit2 failed"); 613 in_tot = -1; 614 goto out; 615 } 616 617 crc = crc32(0L, Z_NULL, 0); 618 for (;;) { 619 if (z.avail_out == 0) { 620 if (write(out, outbufp, BUFLEN) != BUFLEN) { 621 maybe_warn("write"); 622 out_tot = -1; 623 goto out; 624 } 625 626 out_tot += BUFLEN; 627 z.next_out = (unsigned char *)outbufp; 628 z.avail_out = BUFLEN; 629 } 630 631 if (z.avail_in == 0) { 632 in_size = read(in, inbufp, BUFLEN); 633 if (in_size < 0) { 634 maybe_warn("read"); 635 in_tot = -1; 636 goto out; 637 } 638 if (in_size == 0) 639 break; 640 641 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size); 642 in_tot += in_size; 643 z.next_in = (unsigned char *)inbufp; 644 z.avail_in = in_size; 645 } 646 647 error = deflate(&z, Z_NO_FLUSH); 648 if (error != Z_OK && error != Z_STREAM_END) { 649 maybe_warnx("deflate failed"); 650 in_tot = -1; 651 goto out; 652 } 653 } 654 655 /* clean up */ 656 for (;;) { 657 size_t len; 658 ssize_t w; 659 660 error = deflate(&z, Z_FINISH); 661 if (error != Z_OK && error != Z_STREAM_END) { 662 maybe_warnx("deflate failed"); 663 in_tot = -1; 664 goto out; 665 } 666 667 len = (char *)z.next_out - outbufp; 668 669 w = write(out, outbufp, len); 670 if (w == -1 || (size_t)w != len) { 671 maybe_warn("write"); 672 out_tot = -1; 673 goto out; 674 } 675 out_tot += len; 676 z.next_out = (unsigned char *)outbufp; 677 z.avail_out = BUFLEN; 678 679 if (error == Z_STREAM_END) 680 break; 681 } 682 683 if (deflateEnd(&z) != Z_OK) { 684 maybe_warnx("deflateEnd failed"); 685 in_tot = -1; 686 goto out; 687 } 688 689 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c", 690 (int)crc & 0xff, 691 (int)(crc >> 8) & 0xff, 692 (int)(crc >> 16) & 0xff, 693 (int)(crc >> 24) & 0xff, 694 (int)in_tot & 0xff, 695 (int)(in_tot >> 8) & 0xff, 696 (int)(in_tot >> 16) & 0xff, 697 (int)(in_tot >> 24) & 0xff); 698 if (i != 8) 699 maybe_err("snprintf"); 700 if (write(out, outbufp, i) != i) { 701 maybe_warn("write"); 702 in_tot = -1; 703 } else 704 out_tot += i; 705 706 out: 707 if (inbufp != NULL) 708 free(inbufp); 709 if (outbufp != NULL) 710 free(outbufp); 711 if (gsizep) 712 *gsizep = out_tot; 713 return in_tot; 714 } 715 716 /* 717 * uncompress input to output then close the input. return the 718 * uncompressed size written, and put the compressed sized read 719 * into `*gsizep'. 720 */ 721 static off_t 722 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep, 723 const char *filename) 724 { 725 z_stream z; 726 char *outbufp, *inbufp; 727 off_t out_tot = -1, in_tot = 0; 728 uint32_t out_sub_tot = 0; 729 enum { 730 GZSTATE_MAGIC0, 731 GZSTATE_MAGIC1, 732 GZSTATE_METHOD, 733 GZSTATE_FLAGS, 734 GZSTATE_SKIPPING, 735 GZSTATE_EXTRA, 736 GZSTATE_EXTRA2, 737 GZSTATE_EXTRA3, 738 GZSTATE_ORIGNAME, 739 GZSTATE_COMMENT, 740 GZSTATE_HEAD_CRC1, 741 GZSTATE_HEAD_CRC2, 742 GZSTATE_INIT, 743 GZSTATE_READ, 744 GZSTATE_CRC, 745 GZSTATE_LEN, 746 } state = GZSTATE_MAGIC0; 747 int flags = 0, skip_count = 0; 748 int error = Z_STREAM_ERROR, done_reading = 0; 749 uLong crc = 0; 750 ssize_t wr; 751 int needmore = 0; 752 753 #define ADVANCE() { z.next_in++; z.avail_in--; } 754 755 if ((outbufp = malloc(BUFLEN)) == NULL) { 756 maybe_err("malloc failed"); 757 goto out2; 758 } 759 if ((inbufp = malloc(BUFLEN)) == NULL) { 760 maybe_err("malloc failed"); 761 goto out1; 762 } 763 764 memset(&z, 0, sizeof z); 765 z.avail_in = prelen; 766 z.next_in = (unsigned char *)pre; 767 z.avail_out = BUFLEN; 768 z.next_out = (unsigned char *)outbufp; 769 z.zalloc = NULL; 770 z.zfree = NULL; 771 z.opaque = 0; 772 773 in_tot = prelen; 774 out_tot = 0; 775 776 for (;;) { 777 if ((z.avail_in == 0 || needmore) && done_reading == 0) { 778 ssize_t in_size; 779 780 if (z.avail_in > 0) { 781 memmove(inbufp, z.next_in, z.avail_in); 782 } 783 z.next_in = (unsigned char *)inbufp; 784 in_size = read(in, z.next_in + z.avail_in, 785 BUFLEN - z.avail_in); 786 787 if (in_size == -1) { 788 maybe_warn("failed to read stdin"); 789 goto stop_and_fail; 790 } else if (in_size == 0) { 791 done_reading = 1; 792 } 793 794 z.avail_in += in_size; 795 needmore = 0; 796 797 in_tot += in_size; 798 } 799 if (z.avail_in == 0) { 800 if (done_reading && state != GZSTATE_MAGIC0) { 801 maybe_warnx("%s: unexpected end of file", 802 filename); 803 goto stop_and_fail; 804 } 805 goto stop; 806 } 807 switch (state) { 808 case GZSTATE_MAGIC0: 809 if (*z.next_in != GZIP_MAGIC0) { 810 if (in_tot > 0) { 811 maybe_warnx("%s: trailing garbage " 812 "ignored", filename); 813 exit_value = 2; 814 goto stop; 815 } 816 maybe_warnx("input not gziped (MAGIC0)"); 817 goto stop_and_fail; 818 } 819 ADVANCE(); 820 state++; 821 out_sub_tot = 0; 822 crc = crc32(0L, Z_NULL, 0); 823 break; 824 825 case GZSTATE_MAGIC1: 826 if (*z.next_in != GZIP_MAGIC1 && 827 *z.next_in != GZIP_OMAGIC1) { 828 maybe_warnx("input not gziped (MAGIC1)"); 829 goto stop_and_fail; 830 } 831 ADVANCE(); 832 state++; 833 break; 834 835 case GZSTATE_METHOD: 836 if (*z.next_in != Z_DEFLATED) { 837 maybe_warnx("unknown compression method"); 838 goto stop_and_fail; 839 } 840 ADVANCE(); 841 state++; 842 break; 843 844 case GZSTATE_FLAGS: 845 flags = *z.next_in; 846 ADVANCE(); 847 skip_count = 6; 848 state++; 849 break; 850 851 case GZSTATE_SKIPPING: 852 if (skip_count > 0) { 853 skip_count--; 854 ADVANCE(); 855 } else 856 state++; 857 break; 858 859 case GZSTATE_EXTRA: 860 if ((flags & EXTRA_FIELD) == 0) { 861 state = GZSTATE_ORIGNAME; 862 break; 863 } 864 skip_count = *z.next_in; 865 ADVANCE(); 866 state++; 867 break; 868 869 case GZSTATE_EXTRA2: 870 skip_count |= ((*z.next_in) << 8); 871 ADVANCE(); 872 state++; 873 break; 874 875 case GZSTATE_EXTRA3: 876 if (skip_count > 0) { 877 skip_count--; 878 ADVANCE(); 879 } else 880 state++; 881 break; 882 883 case GZSTATE_ORIGNAME: 884 if ((flags & ORIG_NAME) == 0) { 885 state++; 886 break; 887 } 888 if (*z.next_in == 0) 889 state++; 890 ADVANCE(); 891 break; 892 893 case GZSTATE_COMMENT: 894 if ((flags & COMMENT) == 0) { 895 state++; 896 break; 897 } 898 if (*z.next_in == 0) 899 state++; 900 ADVANCE(); 901 break; 902 903 case GZSTATE_HEAD_CRC1: 904 if (flags & HEAD_CRC) 905 skip_count = 2; 906 else 907 skip_count = 0; 908 state++; 909 break; 910 911 case GZSTATE_HEAD_CRC2: 912 if (skip_count > 0) { 913 skip_count--; 914 ADVANCE(); 915 } else 916 state++; 917 break; 918 919 case GZSTATE_INIT: 920 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) { 921 maybe_warnx("failed to inflateInit"); 922 goto stop_and_fail; 923 } 924 state++; 925 break; 926 927 case GZSTATE_READ: 928 error = inflate(&z, Z_FINISH); 929 switch (error) { 930 /* Z_BUF_ERROR goes with Z_FINISH... */ 931 case Z_BUF_ERROR: 932 if (z.avail_out > 0 && !done_reading) 933 continue; 934 935 case Z_STREAM_END: 936 case Z_OK: 937 break; 938 939 case Z_NEED_DICT: 940 maybe_warnx("Z_NEED_DICT error"); 941 goto stop_and_fail; 942 case Z_DATA_ERROR: 943 maybe_warnx("data stream error"); 944 goto stop_and_fail; 945 case Z_STREAM_ERROR: 946 maybe_warnx("internal stream error"); 947 goto stop_and_fail; 948 case Z_MEM_ERROR: 949 maybe_warnx("memory allocation error"); 950 goto stop_and_fail; 951 952 default: 953 maybe_warn("unknown error from inflate(): %d", 954 error); 955 } 956 wr = BUFLEN - z.avail_out; 957 958 if (wr != 0) { 959 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 960 if ( 961 #ifndef SMALL 962 /* don't write anything with -t */ 963 tflag == 0 && 964 #endif 965 write(out, outbufp, wr) != wr) { 966 maybe_warn("error writing to output"); 967 goto stop_and_fail; 968 } 969 970 out_tot += wr; 971 out_sub_tot += wr; 972 } 973 974 if (error == Z_STREAM_END) { 975 inflateEnd(&z); 976 state++; 977 } 978 979 z.next_out = (unsigned char *)outbufp; 980 z.avail_out = BUFLEN; 981 982 break; 983 case GZSTATE_CRC: 984 { 985 uLong origcrc; 986 987 if (z.avail_in < 4) { 988 if (!done_reading) { 989 needmore = 1; 990 continue; 991 } 992 maybe_warnx("truncated input"); 993 goto stop_and_fail; 994 } 995 origcrc = ((unsigned)z.next_in[0] & 0xff) | 996 ((unsigned)z.next_in[1] & 0xff) << 8 | 997 ((unsigned)z.next_in[2] & 0xff) << 16 | 998 ((unsigned)z.next_in[3] & 0xff) << 24; 999 if (origcrc != crc) { 1000 maybe_warnx("invalid compressed" 1001 " data--crc error"); 1002 goto stop_and_fail; 1003 } 1004 } 1005 1006 z.avail_in -= 4; 1007 z.next_in += 4; 1008 1009 if (!z.avail_in && done_reading) { 1010 goto stop; 1011 } 1012 state++; 1013 break; 1014 case GZSTATE_LEN: 1015 { 1016 uLong origlen; 1017 1018 if (z.avail_in < 4) { 1019 if (!done_reading) { 1020 needmore = 1; 1021 continue; 1022 } 1023 maybe_warnx("truncated input"); 1024 goto stop_and_fail; 1025 } 1026 origlen = ((unsigned)z.next_in[0] & 0xff) | 1027 ((unsigned)z.next_in[1] & 0xff) << 8 | 1028 ((unsigned)z.next_in[2] & 0xff) << 16 | 1029 ((unsigned)z.next_in[3] & 0xff) << 24; 1030 1031 if (origlen != out_sub_tot) { 1032 maybe_warnx("invalid compressed" 1033 " data--length error"); 1034 goto stop_and_fail; 1035 } 1036 } 1037 1038 z.avail_in -= 4; 1039 z.next_in += 4; 1040 1041 if (error < 0) { 1042 maybe_warnx("decompression error"); 1043 goto stop_and_fail; 1044 } 1045 state = GZSTATE_MAGIC0; 1046 break; 1047 } 1048 continue; 1049 stop_and_fail: 1050 out_tot = -1; 1051 stop: 1052 break; 1053 } 1054 if (state > GZSTATE_INIT) 1055 inflateEnd(&z); 1056 1057 free(inbufp); 1058 out1: 1059 free(outbufp); 1060 out2: 1061 if (gsizep) 1062 *gsizep = in_tot; 1063 return (out_tot); 1064 } 1065 1066 #ifndef SMALL 1067 /* 1068 * set the owner, mode, flags & utimes using the given file descriptor. 1069 * file is only used in possible warning messages. 1070 */ 1071 static void 1072 copymodes(int fd, const struct stat *sbp, const char *file) 1073 { 1074 struct timespec times[2]; 1075 struct stat sb; 1076 1077 /* 1078 * If we have no info on the input, give this file some 1079 * default values and return.. 1080 */ 1081 if (sbp == NULL) { 1082 mode_t mask = umask(022); 1083 1084 (void)fchmod(fd, DEFFILEMODE & ~mask); 1085 (void)umask(mask); 1086 return; 1087 } 1088 sb = *sbp; 1089 1090 /* if the chown fails, remove set-id bits as-per compress(1) */ 1091 if (fchown(fd, sb.st_uid, sb.st_gid) < 0) { 1092 if (errno != EPERM) 1093 maybe_warn("couldn't fchown: %s", file); 1094 sb.st_mode &= ~(S_ISUID|S_ISGID); 1095 } 1096 1097 /* we only allow set-id and the 9 normal permission bits */ 1098 sb.st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1099 if (fchmod(fd, sb.st_mode) < 0) 1100 maybe_warn("couldn't fchmod: %s", file); 1101 1102 times[0] = sb.st_atim; 1103 times[1] = sb.st_mtim; 1104 if (futimens(fd, times) < 0) 1105 maybe_warn("couldn't futimens: %s", file); 1106 1107 /* only try flags if they exist already */ 1108 if (sb.st_flags != 0 && fchflags(fd, sb.st_flags) < 0) 1109 maybe_warn("couldn't fchflags: %s", file); 1110 } 1111 #endif 1112 1113 /* what sort of file is this? */ 1114 static enum filetype 1115 file_gettype(u_char *buf) 1116 { 1117 1118 if (buf[0] == GZIP_MAGIC0 && 1119 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1120 return FT_GZIP; 1121 else 1122 #ifndef NO_BZIP2_SUPPORT 1123 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1124 buf[3] >= '0' && buf[3] <= '9') 1125 return FT_BZIP2; 1126 else 1127 #endif 1128 #ifndef NO_COMPRESS_SUPPORT 1129 if (memcmp(buf, Z_MAGIC, 2) == 0) 1130 return FT_Z; 1131 else 1132 #endif 1133 #ifndef NO_PACK_SUPPORT 1134 if (memcmp(buf, PACK_MAGIC, 2) == 0) 1135 return FT_PACK; 1136 else 1137 #endif 1138 #ifndef NO_XZ_SUPPORT 1139 if (memcmp(buf, XZ_MAGIC, 4) == 0) /* XXX: We only have 4 bytes */ 1140 return FT_XZ; 1141 else 1142 #endif 1143 return FT_UNKNOWN; 1144 } 1145 1146 #ifndef SMALL 1147 /* check the outfile is OK. */ 1148 static int 1149 check_outfile(const char *outfile) 1150 { 1151 struct stat sb; 1152 int ok = 1; 1153 1154 if (lflag == 0 && stat(outfile, &sb) == 0) { 1155 if (fflag) 1156 unlink(outfile); 1157 else if (isatty(STDIN_FILENO)) { 1158 char ans[10] = { 'n', '\0' }; /* default */ 1159 1160 fprintf(stderr, "%s already exists -- do you wish to " 1161 "overwrite (y or n)? " , outfile); 1162 (void)fgets(ans, sizeof(ans) - 1, stdin); 1163 if (ans[0] != 'y' && ans[0] != 'Y') { 1164 fprintf(stderr, "\tnot overwriting\n"); 1165 ok = 0; 1166 } else 1167 unlink(outfile); 1168 } else { 1169 maybe_warnx("%s already exists -- skipping", outfile); 1170 ok = 0; 1171 } 1172 } 1173 return ok; 1174 } 1175 1176 static void 1177 unlink_input(const char *file, const struct stat *sb) 1178 { 1179 struct stat nsb; 1180 1181 if (kflag) 1182 return; 1183 if (stat(file, &nsb) != 0) 1184 /* Must be gone already */ 1185 return; 1186 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1187 /* Definitely a different file */ 1188 return; 1189 unlink(file); 1190 } 1191 1192 static void 1193 sigint_handler(int signo __unused) 1194 { 1195 1196 if (remove_file != NULL) 1197 unlink(remove_file); 1198 _exit(2); 1199 } 1200 #endif 1201 1202 static const suffixes_t * 1203 check_suffix(char *file, int xlate) 1204 { 1205 const suffixes_t *s; 1206 int len = strlen(file); 1207 char *sp; 1208 1209 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1210 /* if it doesn't fit in "a.suf", don't bother */ 1211 if (s->ziplen >= len) 1212 continue; 1213 sp = file + len - s->ziplen; 1214 if (strcmp(s->zipped, sp) != 0) 1215 continue; 1216 if (xlate) 1217 strcpy(sp, s->normal); 1218 return s; 1219 } 1220 return NULL; 1221 } 1222 1223 /* 1224 * compress the given file: create a corresponding .gz file and remove the 1225 * original. 1226 */ 1227 static off_t 1228 file_compress(char *file, char *outfile, size_t outsize) 1229 { 1230 int in; 1231 int out; 1232 off_t size, insize; 1233 #ifndef SMALL 1234 struct stat isb, osb; 1235 const suffixes_t *suff; 1236 #endif 1237 1238 in = open(file, O_RDONLY); 1239 if (in == -1) { 1240 maybe_warn("can't open %s", file); 1241 return (-1); 1242 } 1243 1244 #ifndef SMALL 1245 if (fstat(in, &isb) != 0) { 1246 maybe_warn("couldn't stat: %s", file); 1247 close(in); 1248 return (-1); 1249 } 1250 #endif 1251 1252 if (cflag == 0) { 1253 #ifndef SMALL 1254 if (isb.st_nlink > 1 && fflag == 0) { 1255 maybe_warnx("%s has %d other link%s -- skipping", 1256 file, isb.st_nlink - 1, 1257 (isb.st_nlink - 1) == 1 ? "" : "s"); 1258 close(in); 1259 return (-1); 1260 } 1261 1262 if (fflag == 0 && (suff = check_suffix(file, 0)) && 1263 suff->zipped[0] != 0) { 1264 maybe_warnx("%s already has %s suffix -- unchanged", 1265 file, suff->zipped); 1266 close(in); 1267 return (-1); 1268 } 1269 #endif 1270 1271 /* Add (usually) .gz to filename */ 1272 if ((size_t)snprintf(outfile, outsize, "%s%s", 1273 file, suffixes[0].zipped) >= outsize) 1274 memcpy(outfile + outsize - suffixes[0].ziplen - 1, 1275 suffixes[0].zipped, suffixes[0].ziplen + 1); 1276 1277 #ifndef SMALL 1278 if (check_outfile(outfile) == 0) { 1279 close(in); 1280 return (-1); 1281 } 1282 #endif 1283 } 1284 1285 if (cflag == 0) { 1286 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600); 1287 if (out == -1) { 1288 maybe_warn("could not create output: %s", outfile); 1289 fclose(stdin); 1290 return (-1); 1291 } 1292 #ifndef SMALL 1293 remove_file = outfile; 1294 #endif 1295 } else 1296 out = STDOUT_FILENO; 1297 1298 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1299 1300 (void)close(in); 1301 1302 /* 1303 * If there was an error, insize will be -1. 1304 * If we compressed to stdout, just return the size. 1305 * Otherwise stat the file and check it is the correct size. 1306 * We only blow away the file if we can stat the output and it 1307 * has the expected size. 1308 */ 1309 if (cflag != 0) 1310 return (insize == -1 ? -1 : size); 1311 1312 #ifndef SMALL 1313 if (fstat(out, &osb) != 0) { 1314 maybe_warn("couldn't stat: %s", outfile); 1315 goto bad_outfile; 1316 } 1317 1318 if (osb.st_size != size) { 1319 maybe_warnx("output file: %s wrong size (%ju != %ju), deleting", 1320 outfile, (uintmax_t)osb.st_size, (uintmax_t)size); 1321 goto bad_outfile; 1322 } 1323 1324 copymodes(out, &isb, outfile); 1325 remove_file = NULL; 1326 #endif 1327 if (close(out) == -1) 1328 maybe_warn("couldn't close output"); 1329 1330 /* output is good, ok to delete input */ 1331 unlink_input(file, &isb); 1332 return (size); 1333 1334 #ifndef SMALL 1335 bad_outfile: 1336 if (close(out) == -1) 1337 maybe_warn("couldn't close output"); 1338 1339 maybe_warnx("leaving original %s", file); 1340 unlink(outfile); 1341 return (size); 1342 #endif 1343 } 1344 1345 /* uncompress the given file and remove the original */ 1346 static off_t 1347 file_uncompress(char *file, char *outfile, size_t outsize) 1348 { 1349 struct stat isb, osb; 1350 off_t size; 1351 ssize_t rbytes; 1352 unsigned char header1[4]; 1353 enum filetype method; 1354 int fd, ofd, zfd = -1; 1355 #ifndef SMALL 1356 ssize_t rv; 1357 time_t timestamp = 0; 1358 char name[PATH_MAX + 1]; 1359 #endif 1360 1361 /* gather the old name info */ 1362 1363 fd = open(file, O_RDONLY); 1364 if (fd < 0) { 1365 maybe_warn("can't open %s", file); 1366 goto lose; 1367 } 1368 1369 strlcpy(outfile, file, outsize); 1370 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1371 maybe_warnx("%s: unknown suffix -- ignored", file); 1372 goto lose; 1373 } 1374 1375 rbytes = read(fd, header1, sizeof header1); 1376 if (rbytes != sizeof header1) { 1377 /* we don't want to fail here. */ 1378 #ifndef SMALL 1379 if (fflag) 1380 goto lose; 1381 #endif 1382 if (rbytes == -1) 1383 maybe_warn("can't read %s", file); 1384 else 1385 goto unexpected_EOF; 1386 goto lose; 1387 } 1388 1389 method = file_gettype(header1); 1390 #ifndef SMALL 1391 if (fflag == 0 && method == FT_UNKNOWN) { 1392 maybe_warnx("%s: not in gzip format", file); 1393 goto lose; 1394 } 1395 1396 #endif 1397 1398 #ifndef SMALL 1399 if (method == FT_GZIP && Nflag) { 1400 unsigned char ts[4]; /* timestamp */ 1401 1402 rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP); 1403 if (rv >= 0 && rv < (ssize_t)(sizeof ts)) 1404 goto unexpected_EOF; 1405 if (rv == -1) { 1406 if (!fflag) 1407 maybe_warn("can't read %s", file); 1408 goto lose; 1409 } 1410 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0]; 1411 1412 if (header1[3] & ORIG_NAME) { 1413 rbytes = pread(fd, name, sizeof(name) - 1, GZIP_ORIGNAME); 1414 if (rbytes < 0) { 1415 maybe_warn("can't read %s", file); 1416 goto lose; 1417 } 1418 if (name[0] != '\0') { 1419 char *dp, *nf; 1420 1421 /* Make sure that name is NUL-terminated */ 1422 name[rbytes] = '\0'; 1423 1424 /* strip saved directory name */ 1425 nf = strrchr(name, '/'); 1426 if (nf == NULL) 1427 nf = name; 1428 else 1429 nf++; 1430 1431 /* preserve original directory name */ 1432 dp = strrchr(file, '/'); 1433 if (dp == NULL) 1434 dp = file; 1435 else 1436 dp++; 1437 snprintf(outfile, outsize, "%.*s%.*s", 1438 (int) (dp - file), 1439 file, (int) rbytes, nf); 1440 } 1441 } 1442 } 1443 #endif 1444 lseek(fd, 0, SEEK_SET); 1445 1446 if (cflag == 0 || lflag) { 1447 if (fstat(fd, &isb) != 0) 1448 goto lose; 1449 #ifndef SMALL 1450 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1451 maybe_warnx("%s has %d other links -- skipping", 1452 file, isb.st_nlink - 1); 1453 goto lose; 1454 } 1455 if (nflag == 0 && timestamp) 1456 isb.st_mtime = timestamp; 1457 if (check_outfile(outfile) == 0) 1458 goto lose; 1459 #endif 1460 } 1461 1462 if (cflag == 0 && lflag == 0) { 1463 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1464 if (zfd == STDOUT_FILENO) { 1465 /* We won't close STDOUT_FILENO later... */ 1466 zfd = dup(zfd); 1467 close(STDOUT_FILENO); 1468 } 1469 if (zfd == -1) { 1470 maybe_warn("can't open %s", outfile); 1471 goto lose; 1472 } 1473 #ifndef SMALL 1474 remove_file = outfile; 1475 #endif 1476 } else 1477 zfd = STDOUT_FILENO; 1478 1479 switch (method) { 1480 #ifndef NO_BZIP2_SUPPORT 1481 case FT_BZIP2: 1482 /* XXX */ 1483 if (lflag) { 1484 maybe_warnx("no -l with bzip2 files"); 1485 goto lose; 1486 } 1487 1488 size = unbzip2(fd, zfd, NULL, 0, NULL); 1489 break; 1490 #endif 1491 1492 #ifndef NO_COMPRESS_SUPPORT 1493 case FT_Z: { 1494 FILE *in, *out; 1495 1496 /* XXX */ 1497 if (lflag) { 1498 maybe_warnx("no -l with Lempel-Ziv files"); 1499 goto lose; 1500 } 1501 1502 if ((in = zdopen(fd)) == NULL) { 1503 maybe_warn("zdopen for read: %s", file); 1504 goto lose; 1505 } 1506 1507 out = fdopen(dup(zfd), "w"); 1508 if (out == NULL) { 1509 maybe_warn("fdopen for write: %s", outfile); 1510 fclose(in); 1511 goto lose; 1512 } 1513 1514 size = zuncompress(in, out, NULL, 0, NULL); 1515 /* need to fclose() if ferror() is true... */ 1516 if (ferror(in) | fclose(in)) { 1517 maybe_warn("failed infile fclose"); 1518 unlink(outfile); 1519 (void)fclose(out); 1520 } 1521 if (fclose(out) != 0) { 1522 maybe_warn("failed outfile fclose"); 1523 unlink(outfile); 1524 goto lose; 1525 } 1526 break; 1527 } 1528 #endif 1529 1530 #ifndef NO_PACK_SUPPORT 1531 case FT_PACK: 1532 if (lflag) { 1533 maybe_warnx("no -l with packed files"); 1534 goto lose; 1535 } 1536 1537 size = unpack(fd, zfd, NULL, 0, NULL); 1538 break; 1539 #endif 1540 1541 #ifndef NO_XZ_SUPPORT 1542 case FT_XZ: 1543 if (lflag) { 1544 maybe_warnx("no -l with xz files"); 1545 goto lose; 1546 } 1547 1548 size = unxz(fd, zfd, NULL, 0, NULL); 1549 break; 1550 #endif 1551 1552 #ifndef SMALL 1553 case FT_UNKNOWN: 1554 if (lflag) { 1555 maybe_warnx("no -l for unknown filetypes"); 1556 goto lose; 1557 } 1558 size = cat_fd(NULL, 0, NULL, fd); 1559 break; 1560 #endif 1561 default: 1562 if (lflag) { 1563 print_list(fd, isb.st_size, outfile, isb.st_mtime); 1564 close(fd); 1565 return -1; /* XXX */ 1566 } 1567 1568 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1569 break; 1570 } 1571 1572 if (close(fd) != 0) 1573 maybe_warn("couldn't close input"); 1574 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1575 maybe_warn("couldn't close output"); 1576 1577 if (size == -1) { 1578 if (cflag == 0) 1579 unlink(outfile); 1580 maybe_warnx("%s: uncompress failed", file); 1581 return -1; 1582 } 1583 1584 /* if testing, or we uncompressed to stdout, this is all we need */ 1585 #ifndef SMALL 1586 if (tflag) 1587 return size; 1588 #endif 1589 /* if we are uncompressing to stdin, don't remove the file. */ 1590 if (cflag) 1591 return size; 1592 1593 /* 1594 * if we create a file... 1595 */ 1596 /* 1597 * if we can't stat the file don't remove the file. 1598 */ 1599 1600 ofd = open(outfile, O_RDWR, 0); 1601 if (ofd == -1) { 1602 maybe_warn("couldn't open (leaving original): %s", 1603 outfile); 1604 return -1; 1605 } 1606 if (fstat(ofd, &osb) != 0) { 1607 maybe_warn("couldn't stat (leaving original): %s", 1608 outfile); 1609 close(ofd); 1610 return -1; 1611 } 1612 if (osb.st_size != size) { 1613 maybe_warnx("stat gave different size: %ju != %ju (leaving original)", 1614 (uintmax_t)size, (uintmax_t)osb.st_size); 1615 close(ofd); 1616 unlink(outfile); 1617 return -1; 1618 } 1619 #ifndef SMALL 1620 copymodes(ofd, &isb, outfile); 1621 remove_file = NULL; 1622 #endif 1623 close(ofd); 1624 unlink_input(file, &isb); 1625 return size; 1626 1627 unexpected_EOF: 1628 maybe_warnx("%s: unexpected end of file", file); 1629 lose: 1630 if (fd != -1) 1631 close(fd); 1632 if (zfd != -1 && zfd != STDOUT_FILENO) 1633 close(fd); 1634 return -1; 1635 } 1636 1637 #ifndef SMALL 1638 static off_t 1639 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd) 1640 { 1641 char buf[BUFLEN]; 1642 off_t in_tot; 1643 ssize_t w; 1644 1645 in_tot = count; 1646 w = write(STDOUT_FILENO, prepend, count); 1647 if (w == -1 || (size_t)w != count) { 1648 maybe_warn("write to stdout"); 1649 return -1; 1650 } 1651 for (;;) { 1652 ssize_t rv; 1653 1654 rv = read(fd, buf, sizeof buf); 1655 if (rv == 0) 1656 break; 1657 if (rv < 0) { 1658 maybe_warn("read from fd %d", fd); 1659 break; 1660 } 1661 1662 if (write(STDOUT_FILENO, buf, rv) != rv) { 1663 maybe_warn("write to stdout"); 1664 break; 1665 } 1666 in_tot += rv; 1667 } 1668 1669 if (gsizep) 1670 *gsizep = in_tot; 1671 return (in_tot); 1672 } 1673 #endif 1674 1675 static void 1676 handle_stdin(void) 1677 { 1678 unsigned char header1[4]; 1679 off_t usize, gsize; 1680 enum filetype method; 1681 ssize_t bytes_read; 1682 #ifndef NO_COMPRESS_SUPPORT 1683 FILE *in; 1684 #endif 1685 1686 #ifndef SMALL 1687 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1688 maybe_warnx("standard input is a terminal -- ignoring"); 1689 return; 1690 } 1691 #endif 1692 1693 if (lflag) { 1694 struct stat isb; 1695 1696 /* XXX could read the whole file, etc. */ 1697 if (fstat(STDIN_FILENO, &isb) < 0) { 1698 maybe_warn("fstat"); 1699 return; 1700 } 1701 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime); 1702 return; 1703 } 1704 1705 bytes_read = read_retry(STDIN_FILENO, header1, sizeof header1); 1706 if (bytes_read == -1) { 1707 maybe_warn("can't read stdin"); 1708 return; 1709 } else if (bytes_read != sizeof(header1)) { 1710 maybe_warnx("(stdin): unexpected end of file"); 1711 return; 1712 } 1713 1714 method = file_gettype(header1); 1715 switch (method) { 1716 default: 1717 #ifndef SMALL 1718 if (fflag == 0) { 1719 maybe_warnx("unknown compression format"); 1720 return; 1721 } 1722 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO); 1723 break; 1724 #endif 1725 case FT_GZIP: 1726 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1727 (char *)header1, sizeof header1, &gsize, "(stdin)"); 1728 break; 1729 #ifndef NO_BZIP2_SUPPORT 1730 case FT_BZIP2: 1731 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1732 (char *)header1, sizeof header1, &gsize); 1733 break; 1734 #endif 1735 #ifndef NO_COMPRESS_SUPPORT 1736 case FT_Z: 1737 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1738 maybe_warnx("zopen of stdin"); 1739 return; 1740 } 1741 1742 usize = zuncompress(in, stdout, (char *)header1, 1743 sizeof header1, &gsize); 1744 fclose(in); 1745 break; 1746 #endif 1747 #ifndef NO_PACK_SUPPORT 1748 case FT_PACK: 1749 usize = unpack(STDIN_FILENO, STDOUT_FILENO, 1750 (char *)header1, sizeof header1, &gsize); 1751 break; 1752 #endif 1753 #ifndef NO_XZ_SUPPORT 1754 case FT_XZ: 1755 usize = unxz(STDIN_FILENO, STDOUT_FILENO, 1756 (char *)header1, sizeof header1, &gsize); 1757 break; 1758 #endif 1759 } 1760 1761 #ifndef SMALL 1762 if (vflag && !tflag && usize != -1 && gsize != -1) 1763 print_verbage(NULL, NULL, usize, gsize); 1764 if (vflag && tflag) 1765 print_test("(stdin)", usize != -1); 1766 #endif 1767 1768 } 1769 1770 static void 1771 handle_stdout(void) 1772 { 1773 off_t gsize, usize; 1774 struct stat sb; 1775 time_t systime; 1776 uint32_t mtime; 1777 int ret; 1778 1779 #ifndef SMALL 1780 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1781 maybe_warnx("standard output is a terminal -- ignoring"); 1782 return; 1783 } 1784 #endif 1785 /* If stdin is a file use its mtime, otherwise use current time */ 1786 ret = fstat(STDIN_FILENO, &sb); 1787 1788 #ifndef SMALL 1789 if (ret < 0) { 1790 maybe_warn("Can't stat stdin"); 1791 return; 1792 } 1793 #endif 1794 1795 if (S_ISREG(sb.st_mode)) 1796 mtime = (uint32_t)sb.st_mtime; 1797 else { 1798 systime = time(NULL); 1799 #ifndef SMALL 1800 if (systime == -1) { 1801 maybe_warn("time"); 1802 return; 1803 } 1804 #endif 1805 mtime = (uint32_t)systime; 1806 } 1807 1808 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime); 1809 #ifndef SMALL 1810 if (vflag && !tflag && usize != -1 && gsize != -1) 1811 print_verbage(NULL, NULL, usize, gsize); 1812 #endif 1813 } 1814 1815 /* do what is asked for, for the path name */ 1816 static void 1817 handle_pathname(char *path) 1818 { 1819 char *opath = path, *s = NULL; 1820 ssize_t len; 1821 int slen; 1822 struct stat sb; 1823 1824 /* check for stdout/stdin */ 1825 if (path[0] == '-' && path[1] == '\0') { 1826 if (dflag) 1827 handle_stdin(); 1828 else 1829 handle_stdout(); 1830 return; 1831 } 1832 1833 retry: 1834 if (stat(path, &sb) != 0 || (fflag == 0 && cflag == 0 && 1835 lstat(path, &sb) != 0)) { 1836 /* lets try <path>.gz if we're decompressing */ 1837 if (dflag && s == NULL && errno == ENOENT) { 1838 len = strlen(path); 1839 slen = suffixes[0].ziplen; 1840 s = malloc(len + slen + 1); 1841 if (s == NULL) 1842 maybe_err("malloc"); 1843 memcpy(s, path, len); 1844 memcpy(s + len, suffixes[0].zipped, slen + 1); 1845 path = s; 1846 goto retry; 1847 } 1848 maybe_warn("can't stat: %s", opath); 1849 goto out; 1850 } 1851 1852 if (S_ISDIR(sb.st_mode)) { 1853 #ifndef SMALL 1854 if (rflag) 1855 handle_dir(path); 1856 else 1857 #endif 1858 maybe_warnx("%s is a directory", path); 1859 goto out; 1860 } 1861 1862 if (S_ISREG(sb.st_mode)) 1863 handle_file(path, &sb); 1864 else 1865 maybe_warnx("%s is not a regular file", path); 1866 1867 out: 1868 if (s) 1869 free(s); 1870 } 1871 1872 /* compress/decompress a file */ 1873 static void 1874 handle_file(char *file, struct stat *sbp) 1875 { 1876 off_t usize, gsize; 1877 char outfile[PATH_MAX]; 1878 1879 infile = file; 1880 if (dflag) { 1881 usize = file_uncompress(file, outfile, sizeof(outfile)); 1882 #ifndef SMALL 1883 if (vflag && tflag) 1884 print_test(file, usize != -1); 1885 #endif 1886 if (usize == -1) 1887 return; 1888 gsize = sbp->st_size; 1889 } else { 1890 gsize = file_compress(file, outfile, sizeof(outfile)); 1891 if (gsize == -1) 1892 return; 1893 usize = sbp->st_size; 1894 } 1895 1896 1897 #ifndef SMALL 1898 if (vflag && !tflag) 1899 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 1900 #endif 1901 } 1902 1903 #ifndef SMALL 1904 /* this is used with -r to recursively descend directories */ 1905 static void 1906 handle_dir(char *dir) 1907 { 1908 char *path_argv[2]; 1909 FTS *fts; 1910 FTSENT *entry; 1911 1912 path_argv[0] = dir; 1913 path_argv[1] = 0; 1914 fts = fts_open(path_argv, FTS_PHYSICAL | FTS_NOCHDIR, NULL); 1915 if (fts == NULL) { 1916 warn("couldn't fts_open %s", dir); 1917 return; 1918 } 1919 1920 while ((entry = fts_read(fts))) { 1921 switch(entry->fts_info) { 1922 case FTS_D: 1923 case FTS_DP: 1924 continue; 1925 1926 case FTS_DNR: 1927 case FTS_ERR: 1928 case FTS_NS: 1929 maybe_warn("%s", entry->fts_path); 1930 continue; 1931 case FTS_F: 1932 handle_file(entry->fts_path, entry->fts_statp); 1933 } 1934 } 1935 (void)fts_close(fts); 1936 } 1937 #endif 1938 1939 /* print a ratio - size reduction as a fraction of uncompressed size */ 1940 static void 1941 print_ratio(off_t in, off_t out, FILE *where) 1942 { 1943 int percent10; /* 10 * percent */ 1944 off_t diff; 1945 char buff[8]; 1946 int len; 1947 1948 diff = in - out/2; 1949 if (diff <= 0) 1950 /* 1951 * Output is more than double size of input! print -99.9% 1952 * Quite possibly we've failed to get the original size. 1953 */ 1954 percent10 = -999; 1955 else { 1956 /* 1957 * We only need 12 bits of result from the final division, 1958 * so reduce the values until a 32bit division will suffice. 1959 */ 1960 while (in > 0x100000) { 1961 diff >>= 1; 1962 in >>= 1; 1963 } 1964 if (in != 0) 1965 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 1966 else 1967 percent10 = 0; 1968 } 1969 1970 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 1971 /* Move the '.' to before the last digit */ 1972 buff[len - 1] = buff[len - 2]; 1973 buff[len - 2] = '.'; 1974 fprintf(where, "%5s%%", buff); 1975 } 1976 1977 #ifndef SMALL 1978 /* print compression statistics, and the new name (if there is one!) */ 1979 static void 1980 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 1981 { 1982 if (file) 1983 fprintf(stderr, "%s:%s ", file, 1984 strlen(file) < 7 ? "\t\t" : "\t"); 1985 print_ratio(usize, gsize, stderr); 1986 if (nfile) 1987 fprintf(stderr, " -- replaced with %s", nfile); 1988 fprintf(stderr, "\n"); 1989 fflush(stderr); 1990 } 1991 1992 /* print test results */ 1993 static void 1994 print_test(const char *file, int ok) 1995 { 1996 1997 if (exit_value == 0 && ok == 0) 1998 exit_value = 1; 1999 fprintf(stderr, "%s:%s %s\n", file, 2000 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 2001 fflush(stderr); 2002 } 2003 #endif 2004 2005 /* print a file's info ala --list */ 2006 /* eg: 2007 compressed uncompressed ratio uncompressed_name 2008 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 2009 */ 2010 static void 2011 print_list(int fd, off_t out, const char *outfile, time_t ts) 2012 { 2013 static int first = 1; 2014 #ifndef SMALL 2015 static off_t in_tot, out_tot; 2016 uint32_t crc = 0; 2017 #endif 2018 off_t in = 0, rv; 2019 2020 if (first) { 2021 #ifndef SMALL 2022 if (vflag) 2023 printf("method crc date time "); 2024 #endif 2025 if (qflag == 0) 2026 printf(" compressed uncompressed " 2027 "ratio uncompressed_name\n"); 2028 } 2029 first = 0; 2030 2031 /* print totals? */ 2032 #ifndef SMALL 2033 if (fd == -1) { 2034 in = in_tot; 2035 out = out_tot; 2036 } else 2037 #endif 2038 { 2039 /* read the last 4 bytes - this is the uncompressed size */ 2040 rv = lseek(fd, (off_t)(-8), SEEK_END); 2041 if (rv != -1) { 2042 unsigned char buf[8]; 2043 uint32_t usize; 2044 2045 rv = read(fd, (char *)buf, sizeof(buf)); 2046 if (rv == -1) 2047 maybe_warn("read of uncompressed size"); 2048 else if (rv != sizeof(buf)) 2049 maybe_warnx("read of uncompressed size"); 2050 2051 else { 2052 usize = buf[4] | buf[5] << 8 | 2053 buf[6] << 16 | buf[7] << 24; 2054 in = (off_t)usize; 2055 #ifndef SMALL 2056 crc = buf[0] | buf[1] << 8 | 2057 buf[2] << 16 | buf[3] << 24; 2058 #endif 2059 } 2060 } 2061 } 2062 2063 #ifndef SMALL 2064 if (vflag && fd == -1) 2065 printf(" "); 2066 else if (vflag) { 2067 char *date = ctime(&ts); 2068 2069 /* skip the day, 1/100th second, and year */ 2070 date += 4; 2071 date[12] = 0; 2072 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 2073 } 2074 in_tot += in; 2075 out_tot += out; 2076 #else 2077 (void)&ts; /* XXX */ 2078 #endif 2079 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 2080 print_ratio(in, out, stdout); 2081 printf(" %s\n", outfile); 2082 } 2083 2084 /* display the usage of NetBSD gzip */ 2085 static void 2086 usage(void) 2087 { 2088 2089 fprintf(stderr, "%s\n", gzip_version); 2090 fprintf(stderr, 2091 #ifdef SMALL 2092 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n", 2093 #else 2094 "usage: %s [-123456789acdfhklLNnqrtVv] [-S .suffix] [<file> [<file> ...]]\n" 2095 " -1 --fast fastest (worst) compression\n" 2096 " -2 .. -8 set compression level\n" 2097 " -9 --best best (slowest) compression\n" 2098 " -c --stdout write to stdout, keep original files\n" 2099 " --to-stdout\n" 2100 " -d --decompress uncompress files\n" 2101 " --uncompress\n" 2102 " -f --force force overwriting & compress links\n" 2103 " -h --help display this help\n" 2104 " -k --keep don't delete input files during operation\n" 2105 " -l --list list compressed file contents\n" 2106 " -N --name save or restore original file name and time stamp\n" 2107 " -n --no-name don't save original file name or time stamp\n" 2108 " -q --quiet output no warnings\n" 2109 " -r --recursive recursively compress files in directories\n" 2110 " -S .suf use suffix .suf instead of .gz\n" 2111 " --suffix .suf\n" 2112 " -t --test test compressed file\n" 2113 " -V --version display program version\n" 2114 " -v --verbose print extra statistics\n", 2115 #endif 2116 getprogname()); 2117 exit(0); 2118 } 2119 2120 #ifndef SMALL 2121 /* display the license information of FreeBSD gzip */ 2122 static void 2123 display_license(void) 2124 { 2125 2126 fprintf(stderr, "%s (based on NetBSD gzip 20150113)\n", gzip_version); 2127 fprintf(stderr, "%s\n", gzip_copyright); 2128 exit(0); 2129 } 2130 #endif 2131 2132 /* display the version of NetBSD gzip */ 2133 static void 2134 display_version(void) 2135 { 2136 2137 fprintf(stderr, "%s\n", gzip_version); 2138 exit(0); 2139 } 2140 2141 #ifndef NO_BZIP2_SUPPORT 2142 #include "unbzip2.c" 2143 #endif 2144 #ifndef NO_COMPRESS_SUPPORT 2145 #include "zuncompress.c" 2146 #endif 2147 #ifndef NO_PACK_SUPPORT 2148 #include "unpack.c" 2149 #endif 2150 #ifndef NO_XZ_SUPPORT 2151 #include "unxz.c" 2152 #endif 2153 2154 static ssize_t 2155 read_retry(int fd, void *buf, size_t sz) 2156 { 2157 char *cp = buf; 2158 size_t left = MIN(sz, (size_t) SSIZE_MAX); 2159 2160 while (left > 0) { 2161 ssize_t ret; 2162 2163 ret = read(fd, cp, left); 2164 if (ret == -1) { 2165 return ret; 2166 } else if (ret == 0) { 2167 break; /* EOF */ 2168 } 2169 cp += ret; 2170 left -= ret; 2171 } 2172 2173 return sz - left; 2174 } 2175