1 /* $NetBSD: gzip.c,v 1.108 2015/04/15 02:29:12 christos 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 "\102\132\150" 92 #endif 93 94 #ifndef NO_COMPRESS_SUPPORT 95 #define Z_SUFFIX ".Z" 96 #define Z_MAGIC "\037\235" 97 #endif 98 99 #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 (sizeof suffixes / sizeof suffixes[0]) 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 goto stop; 814 } 815 maybe_warnx("input not gziped (MAGIC0)"); 816 goto stop_and_fail; 817 } 818 ADVANCE(); 819 state++; 820 out_sub_tot = 0; 821 crc = crc32(0L, Z_NULL, 0); 822 break; 823 824 case GZSTATE_MAGIC1: 825 if (*z.next_in != GZIP_MAGIC1 && 826 *z.next_in != GZIP_OMAGIC1) { 827 maybe_warnx("input not gziped (MAGIC1)"); 828 goto stop_and_fail; 829 } 830 ADVANCE(); 831 state++; 832 break; 833 834 case GZSTATE_METHOD: 835 if (*z.next_in != Z_DEFLATED) { 836 maybe_warnx("unknown compression method"); 837 goto stop_and_fail; 838 } 839 ADVANCE(); 840 state++; 841 break; 842 843 case GZSTATE_FLAGS: 844 flags = *z.next_in; 845 ADVANCE(); 846 skip_count = 6; 847 state++; 848 break; 849 850 case GZSTATE_SKIPPING: 851 if (skip_count > 0) { 852 skip_count--; 853 ADVANCE(); 854 } else 855 state++; 856 break; 857 858 case GZSTATE_EXTRA: 859 if ((flags & EXTRA_FIELD) == 0) { 860 state = GZSTATE_ORIGNAME; 861 break; 862 } 863 skip_count = *z.next_in; 864 ADVANCE(); 865 state++; 866 break; 867 868 case GZSTATE_EXTRA2: 869 skip_count |= ((*z.next_in) << 8); 870 ADVANCE(); 871 state++; 872 break; 873 874 case GZSTATE_EXTRA3: 875 if (skip_count > 0) { 876 skip_count--; 877 ADVANCE(); 878 } else 879 state++; 880 break; 881 882 case GZSTATE_ORIGNAME: 883 if ((flags & ORIG_NAME) == 0) { 884 state++; 885 break; 886 } 887 if (*z.next_in == 0) 888 state++; 889 ADVANCE(); 890 break; 891 892 case GZSTATE_COMMENT: 893 if ((flags & COMMENT) == 0) { 894 state++; 895 break; 896 } 897 if (*z.next_in == 0) 898 state++; 899 ADVANCE(); 900 break; 901 902 case GZSTATE_HEAD_CRC1: 903 if (flags & HEAD_CRC) 904 skip_count = 2; 905 else 906 skip_count = 0; 907 state++; 908 break; 909 910 case GZSTATE_HEAD_CRC2: 911 if (skip_count > 0) { 912 skip_count--; 913 ADVANCE(); 914 } else 915 state++; 916 break; 917 918 case GZSTATE_INIT: 919 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) { 920 maybe_warnx("failed to inflateInit"); 921 goto stop_and_fail; 922 } 923 state++; 924 break; 925 926 case GZSTATE_READ: 927 error = inflate(&z, Z_FINISH); 928 switch (error) { 929 /* Z_BUF_ERROR goes with Z_FINISH... */ 930 case Z_BUF_ERROR: 931 if (z.avail_out > 0 && !done_reading) 932 continue; 933 934 case Z_STREAM_END: 935 case Z_OK: 936 break; 937 938 case Z_NEED_DICT: 939 maybe_warnx("Z_NEED_DICT error"); 940 goto stop_and_fail; 941 case Z_DATA_ERROR: 942 maybe_warnx("data stream error"); 943 goto stop_and_fail; 944 case Z_STREAM_ERROR: 945 maybe_warnx("internal stream error"); 946 goto stop_and_fail; 947 case Z_MEM_ERROR: 948 maybe_warnx("memory allocation error"); 949 goto stop_and_fail; 950 951 default: 952 maybe_warn("unknown error from inflate(): %d", 953 error); 954 } 955 wr = BUFLEN - z.avail_out; 956 957 if (wr != 0) { 958 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 959 if ( 960 #ifndef SMALL 961 /* don't write anything with -t */ 962 tflag == 0 && 963 #endif 964 write(out, outbufp, wr) != wr) { 965 maybe_warn("error writing to output"); 966 goto stop_and_fail; 967 } 968 969 out_tot += wr; 970 out_sub_tot += wr; 971 } 972 973 if (error == Z_STREAM_END) { 974 inflateEnd(&z); 975 state++; 976 } 977 978 z.next_out = (unsigned char *)outbufp; 979 z.avail_out = BUFLEN; 980 981 break; 982 case GZSTATE_CRC: 983 { 984 uLong origcrc; 985 986 if (z.avail_in < 4) { 987 if (!done_reading) { 988 needmore = 1; 989 continue; 990 } 991 maybe_warnx("truncated input"); 992 goto stop_and_fail; 993 } 994 origcrc = ((unsigned)z.next_in[0] & 0xff) | 995 ((unsigned)z.next_in[1] & 0xff) << 8 | 996 ((unsigned)z.next_in[2] & 0xff) << 16 | 997 ((unsigned)z.next_in[3] & 0xff) << 24; 998 if (origcrc != crc) { 999 maybe_warnx("invalid compressed" 1000 " data--crc error"); 1001 goto stop_and_fail; 1002 } 1003 } 1004 1005 z.avail_in -= 4; 1006 z.next_in += 4; 1007 1008 if (!z.avail_in && done_reading) { 1009 goto stop; 1010 } 1011 state++; 1012 break; 1013 case GZSTATE_LEN: 1014 { 1015 uLong origlen; 1016 1017 if (z.avail_in < 4) { 1018 if (!done_reading) { 1019 needmore = 1; 1020 continue; 1021 } 1022 maybe_warnx("truncated input"); 1023 goto stop_and_fail; 1024 } 1025 origlen = ((unsigned)z.next_in[0] & 0xff) | 1026 ((unsigned)z.next_in[1] & 0xff) << 8 | 1027 ((unsigned)z.next_in[2] & 0xff) << 16 | 1028 ((unsigned)z.next_in[3] & 0xff) << 24; 1029 1030 if (origlen != out_sub_tot) { 1031 maybe_warnx("invalid compressed" 1032 " data--length error"); 1033 goto stop_and_fail; 1034 } 1035 } 1036 1037 z.avail_in -= 4; 1038 z.next_in += 4; 1039 1040 if (error < 0) { 1041 maybe_warnx("decompression error"); 1042 goto stop_and_fail; 1043 } 1044 state = GZSTATE_MAGIC0; 1045 break; 1046 } 1047 continue; 1048 stop_and_fail: 1049 out_tot = -1; 1050 stop: 1051 break; 1052 } 1053 if (state > GZSTATE_INIT) 1054 inflateEnd(&z); 1055 1056 free(inbufp); 1057 out1: 1058 free(outbufp); 1059 out2: 1060 if (gsizep) 1061 *gsizep = in_tot; 1062 return (out_tot); 1063 } 1064 1065 #ifndef SMALL 1066 /* 1067 * set the owner, mode, flags & utimes using the given file descriptor. 1068 * file is only used in possible warning messages. 1069 */ 1070 static void 1071 copymodes(int fd, const struct stat *sbp, const char *file) 1072 { 1073 struct timespec times[2]; 1074 struct stat sb; 1075 1076 /* 1077 * If we have no info on the input, give this file some 1078 * default values and return.. 1079 */ 1080 if (sbp == NULL) { 1081 mode_t mask = umask(022); 1082 1083 (void)fchmod(fd, DEFFILEMODE & ~mask); 1084 (void)umask(mask); 1085 return; 1086 } 1087 sb = *sbp; 1088 1089 /* if the chown fails, remove set-id bits as-per compress(1) */ 1090 if (fchown(fd, sb.st_uid, sb.st_gid) < 0) { 1091 if (errno != EPERM) 1092 maybe_warn("couldn't fchown: %s", file); 1093 sb.st_mode &= ~(S_ISUID|S_ISGID); 1094 } 1095 1096 /* we only allow set-id and the 9 normal permission bits */ 1097 sb.st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1098 if (fchmod(fd, sb.st_mode) < 0) 1099 maybe_warn("couldn't fchmod: %s", file); 1100 1101 times[0] = sb.st_atim; 1102 times[1] = sb.st_mtim; 1103 if (futimens(fd, times) < 0) 1104 maybe_warn("couldn't futimens: %s", file); 1105 1106 /* only try flags if they exist already */ 1107 if (sb.st_flags != 0 && fchflags(fd, sb.st_flags) < 0) 1108 maybe_warn("couldn't fchflags: %s", file); 1109 } 1110 #endif 1111 1112 /* what sort of file is this? */ 1113 static enum filetype 1114 file_gettype(u_char *buf) 1115 { 1116 1117 if (buf[0] == GZIP_MAGIC0 && 1118 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1119 return FT_GZIP; 1120 else 1121 #ifndef NO_BZIP2_SUPPORT 1122 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1123 buf[3] >= '0' && buf[3] <= '9') 1124 return FT_BZIP2; 1125 else 1126 #endif 1127 #ifndef NO_COMPRESS_SUPPORT 1128 if (memcmp(buf, Z_MAGIC, 2) == 0) 1129 return FT_Z; 1130 else 1131 #endif 1132 #ifndef NO_PACK_SUPPORT 1133 if (memcmp(buf, PACK_MAGIC, 2) == 0) 1134 return FT_PACK; 1135 else 1136 #endif 1137 #ifndef NO_XZ_SUPPORT 1138 if (memcmp(buf, XZ_MAGIC, 4) == 0) /* XXX: We only have 4 bytes */ 1139 return FT_XZ; 1140 else 1141 #endif 1142 return FT_UNKNOWN; 1143 } 1144 1145 #ifndef SMALL 1146 /* check the outfile is OK. */ 1147 static int 1148 check_outfile(const char *outfile) 1149 { 1150 struct stat sb; 1151 int ok = 1; 1152 1153 if (lflag == 0 && stat(outfile, &sb) == 0) { 1154 if (fflag) 1155 unlink(outfile); 1156 else if (isatty(STDIN_FILENO)) { 1157 char ans[10] = { 'n', '\0' }; /* default */ 1158 1159 fprintf(stderr, "%s already exists -- do you wish to " 1160 "overwrite (y or n)? " , outfile); 1161 (void)fgets(ans, sizeof(ans) - 1, stdin); 1162 if (ans[0] != 'y' && ans[0] != 'Y') { 1163 fprintf(stderr, "\tnot overwriting\n"); 1164 ok = 0; 1165 } else 1166 unlink(outfile); 1167 } else { 1168 maybe_warnx("%s already exists -- skipping", outfile); 1169 ok = 0; 1170 } 1171 } 1172 return ok; 1173 } 1174 1175 static void 1176 unlink_input(const char *file, const struct stat *sb) 1177 { 1178 struct stat nsb; 1179 1180 if (kflag) 1181 return; 1182 if (stat(file, &nsb) != 0) 1183 /* Must be gone already */ 1184 return; 1185 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1186 /* Definitely a different file */ 1187 return; 1188 unlink(file); 1189 } 1190 1191 static void 1192 sigint_handler(int signo __unused) 1193 { 1194 1195 if (remove_file != NULL) 1196 unlink(remove_file); 1197 _exit(2); 1198 } 1199 #endif 1200 1201 static const suffixes_t * 1202 check_suffix(char *file, int xlate) 1203 { 1204 const suffixes_t *s; 1205 int len = strlen(file); 1206 char *sp; 1207 1208 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1209 /* if it doesn't fit in "a.suf", don't bother */ 1210 if (s->ziplen >= len) 1211 continue; 1212 sp = file + len - s->ziplen; 1213 if (strcmp(s->zipped, sp) != 0) 1214 continue; 1215 if (xlate) 1216 strcpy(sp, s->normal); 1217 return s; 1218 } 1219 return NULL; 1220 } 1221 1222 /* 1223 * compress the given file: create a corresponding .gz file and remove the 1224 * original. 1225 */ 1226 static off_t 1227 file_compress(char *file, char *outfile, size_t outsize) 1228 { 1229 int in; 1230 int out; 1231 off_t size, insize; 1232 #ifndef SMALL 1233 struct stat isb, osb; 1234 const suffixes_t *suff; 1235 #endif 1236 1237 in = open(file, O_RDONLY); 1238 if (in == -1) { 1239 maybe_warn("can't open %s", file); 1240 return (-1); 1241 } 1242 1243 #ifndef SMALL 1244 if (fstat(in, &isb) != 0) { 1245 maybe_warn("couldn't stat: %s", file); 1246 close(in); 1247 return (-1); 1248 } 1249 #endif 1250 1251 if (cflag == 0) { 1252 #ifndef SMALL 1253 if (isb.st_nlink > 1 && fflag == 0) { 1254 maybe_warnx("%s has %d other link%s -- skipping", 1255 file, isb.st_nlink - 1, 1256 (isb.st_nlink - 1) == 1 ? "" : "s"); 1257 close(in); 1258 return (-1); 1259 } 1260 1261 if (fflag == 0 && (suff = check_suffix(file, 0)) && 1262 suff->zipped[0] != 0) { 1263 maybe_warnx("%s already has %s suffix -- unchanged", 1264 file, suff->zipped); 1265 close(in); 1266 return (-1); 1267 } 1268 #endif 1269 1270 /* Add (usually) .gz to filename */ 1271 if ((size_t)snprintf(outfile, outsize, "%s%s", 1272 file, suffixes[0].zipped) >= outsize) 1273 memcpy(outfile + outsize - suffixes[0].ziplen - 1, 1274 suffixes[0].zipped, suffixes[0].ziplen + 1); 1275 1276 #ifndef SMALL 1277 if (check_outfile(outfile) == 0) { 1278 close(in); 1279 return (-1); 1280 } 1281 #endif 1282 } 1283 1284 if (cflag == 0) { 1285 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600); 1286 if (out == -1) { 1287 maybe_warn("could not create output: %s", outfile); 1288 fclose(stdin); 1289 return (-1); 1290 } 1291 #ifndef SMALL 1292 remove_file = outfile; 1293 #endif 1294 } else 1295 out = STDOUT_FILENO; 1296 1297 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1298 1299 (void)close(in); 1300 1301 /* 1302 * If there was an error, insize will be -1. 1303 * If we compressed to stdout, just return the size. 1304 * Otherwise stat the file and check it is the correct size. 1305 * We only blow away the file if we can stat the output and it 1306 * has the expected size. 1307 */ 1308 if (cflag != 0) 1309 return (insize == -1 ? -1 : size); 1310 1311 #ifndef SMALL 1312 if (fstat(out, &osb) != 0) { 1313 maybe_warn("couldn't stat: %s", outfile); 1314 goto bad_outfile; 1315 } 1316 1317 if (osb.st_size != size) { 1318 maybe_warnx("output file: %s wrong size (%ju != %ju), deleting", 1319 outfile, (uintmax_t)osb.st_size, (uintmax_t)size); 1320 goto bad_outfile; 1321 } 1322 1323 copymodes(out, &isb, outfile); 1324 remove_file = NULL; 1325 #endif 1326 if (close(out) == -1) 1327 maybe_warn("couldn't close output"); 1328 1329 /* output is good, ok to delete input */ 1330 unlink_input(file, &isb); 1331 return (size); 1332 1333 #ifndef SMALL 1334 bad_outfile: 1335 if (close(out) == -1) 1336 maybe_warn("couldn't close output"); 1337 1338 maybe_warnx("leaving original %s", file); 1339 unlink(outfile); 1340 return (size); 1341 #endif 1342 } 1343 1344 /* uncompress the given file and remove the original */ 1345 static off_t 1346 file_uncompress(char *file, char *outfile, size_t outsize) 1347 { 1348 struct stat isb, osb; 1349 off_t size; 1350 ssize_t rbytes; 1351 unsigned char header1[4]; 1352 enum filetype method; 1353 int fd, ofd, zfd = -1; 1354 #ifndef SMALL 1355 ssize_t rv; 1356 time_t timestamp = 0; 1357 char name[PATH_MAX + 1]; 1358 #endif 1359 1360 /* gather the old name info */ 1361 1362 fd = open(file, O_RDONLY); 1363 if (fd < 0) { 1364 maybe_warn("can't open %s", file); 1365 goto lose; 1366 } 1367 1368 strlcpy(outfile, file, outsize); 1369 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1370 maybe_warnx("%s: unknown suffix -- ignored", file); 1371 goto lose; 1372 } 1373 1374 rbytes = read(fd, header1, sizeof header1); 1375 if (rbytes != sizeof header1) { 1376 /* we don't want to fail here. */ 1377 #ifndef SMALL 1378 if (fflag) 1379 goto lose; 1380 #endif 1381 if (rbytes == -1) 1382 maybe_warn("can't read %s", file); 1383 else 1384 goto unexpected_EOF; 1385 goto lose; 1386 } 1387 1388 method = file_gettype(header1); 1389 #ifndef SMALL 1390 if (fflag == 0 && method == FT_UNKNOWN) { 1391 maybe_warnx("%s: not in gzip format", file); 1392 goto lose; 1393 } 1394 1395 #endif 1396 1397 #ifndef SMALL 1398 if (method == FT_GZIP && Nflag) { 1399 unsigned char ts[4]; /* timestamp */ 1400 1401 rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP); 1402 if (rv >= 0 && rv < (ssize_t)(sizeof ts)) 1403 goto unexpected_EOF; 1404 if (rv == -1) { 1405 if (!fflag) 1406 maybe_warn("can't read %s", file); 1407 goto lose; 1408 } 1409 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0]; 1410 1411 if (header1[3] & ORIG_NAME) { 1412 rbytes = pread(fd, name, sizeof(name) - 1, GZIP_ORIGNAME); 1413 if (rbytes < 0) { 1414 maybe_warn("can't read %s", file); 1415 goto lose; 1416 } 1417 if (name[0] != '\0') { 1418 char *dp, *nf; 1419 1420 /* Make sure that name is NUL-terminated */ 1421 name[rbytes] = '\0'; 1422 1423 /* strip saved directory name */ 1424 nf = strrchr(name, '/'); 1425 if (nf == NULL) 1426 nf = name; 1427 else 1428 nf++; 1429 1430 /* preserve original directory name */ 1431 dp = strrchr(file, '/'); 1432 if (dp == NULL) 1433 dp = file; 1434 else 1435 dp++; 1436 snprintf(outfile, outsize, "%.*s%.*s", 1437 (int) (dp - file), 1438 file, (int) rbytes, nf); 1439 } 1440 } 1441 } 1442 #endif 1443 lseek(fd, 0, SEEK_SET); 1444 1445 if (cflag == 0 || lflag) { 1446 if (fstat(fd, &isb) != 0) 1447 goto lose; 1448 #ifndef SMALL 1449 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1450 maybe_warnx("%s has %d other links -- skipping", 1451 file, isb.st_nlink - 1); 1452 goto lose; 1453 } 1454 if (nflag == 0 && timestamp) 1455 isb.st_mtime = timestamp; 1456 if (check_outfile(outfile) == 0) 1457 goto lose; 1458 #endif 1459 } 1460 1461 if (cflag == 0 && lflag == 0) { 1462 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1463 if (zfd == STDOUT_FILENO) { 1464 /* We won't close STDOUT_FILENO later... */ 1465 zfd = dup(zfd); 1466 close(STDOUT_FILENO); 1467 } 1468 if (zfd == -1) { 1469 maybe_warn("can't open %s", outfile); 1470 goto lose; 1471 } 1472 #ifndef SMALL 1473 remove_file = outfile; 1474 #endif 1475 } else 1476 zfd = STDOUT_FILENO; 1477 1478 switch (method) { 1479 #ifndef NO_BZIP2_SUPPORT 1480 case FT_BZIP2: 1481 /* XXX */ 1482 if (lflag) { 1483 maybe_warnx("no -l with bzip2 files"); 1484 goto lose; 1485 } 1486 1487 size = unbzip2(fd, zfd, NULL, 0, NULL); 1488 break; 1489 #endif 1490 1491 #ifndef NO_COMPRESS_SUPPORT 1492 case FT_Z: { 1493 FILE *in, *out; 1494 1495 /* XXX */ 1496 if (lflag) { 1497 maybe_warnx("no -l with Lempel-Ziv files"); 1498 goto lose; 1499 } 1500 1501 if ((in = zdopen(fd)) == NULL) { 1502 maybe_warn("zdopen for read: %s", file); 1503 goto lose; 1504 } 1505 1506 out = fdopen(dup(zfd), "w"); 1507 if (out == NULL) { 1508 maybe_warn("fdopen for write: %s", outfile); 1509 fclose(in); 1510 goto lose; 1511 } 1512 1513 size = zuncompress(in, out, NULL, 0, NULL); 1514 /* need to fclose() if ferror() is true... */ 1515 if (ferror(in) | fclose(in)) { 1516 maybe_warn("failed infile fclose"); 1517 unlink(outfile); 1518 (void)fclose(out); 1519 } 1520 if (fclose(out) != 0) { 1521 maybe_warn("failed outfile fclose"); 1522 unlink(outfile); 1523 goto lose; 1524 } 1525 break; 1526 } 1527 #endif 1528 1529 #ifndef NO_PACK_SUPPORT 1530 case FT_PACK: 1531 if (lflag) { 1532 maybe_warnx("no -l with packed files"); 1533 goto lose; 1534 } 1535 1536 size = unpack(fd, zfd, NULL, 0, NULL); 1537 break; 1538 #endif 1539 1540 #ifndef NO_XZ_SUPPORT 1541 case FT_XZ: 1542 if (lflag) { 1543 maybe_warnx("no -l with xz files"); 1544 goto lose; 1545 } 1546 1547 size = unxz(fd, zfd, NULL, 0, NULL); 1548 break; 1549 #endif 1550 1551 #ifndef SMALL 1552 case FT_UNKNOWN: 1553 if (lflag) { 1554 maybe_warnx("no -l for unknown filetypes"); 1555 goto lose; 1556 } 1557 size = cat_fd(NULL, 0, NULL, fd); 1558 break; 1559 #endif 1560 default: 1561 if (lflag) { 1562 print_list(fd, isb.st_size, outfile, isb.st_mtime); 1563 close(fd); 1564 return -1; /* XXX */ 1565 } 1566 1567 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1568 break; 1569 } 1570 1571 if (close(fd) != 0) 1572 maybe_warn("couldn't close input"); 1573 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1574 maybe_warn("couldn't close output"); 1575 1576 if (size == -1) { 1577 if (cflag == 0) 1578 unlink(outfile); 1579 maybe_warnx("%s: uncompress failed", file); 1580 return -1; 1581 } 1582 1583 /* if testing, or we uncompressed to stdout, this is all we need */ 1584 #ifndef SMALL 1585 if (tflag) 1586 return size; 1587 #endif 1588 /* if we are uncompressing to stdin, don't remove the file. */ 1589 if (cflag) 1590 return size; 1591 1592 /* 1593 * if we create a file... 1594 */ 1595 /* 1596 * if we can't stat the file don't remove the file. 1597 */ 1598 1599 ofd = open(outfile, O_RDWR, 0); 1600 if (ofd == -1) { 1601 maybe_warn("couldn't open (leaving original): %s", 1602 outfile); 1603 return -1; 1604 } 1605 if (fstat(ofd, &osb) != 0) { 1606 maybe_warn("couldn't stat (leaving original): %s", 1607 outfile); 1608 close(ofd); 1609 return -1; 1610 } 1611 if (osb.st_size != size) { 1612 maybe_warnx("stat gave different size: %ju != %ju (leaving original)", 1613 (uintmax_t)size, (uintmax_t)osb.st_size); 1614 close(ofd); 1615 unlink(outfile); 1616 return -1; 1617 } 1618 #ifndef SMALL 1619 copymodes(ofd, &isb, outfile); 1620 remove_file = NULL; 1621 #endif 1622 close(ofd); 1623 unlink_input(file, &isb); 1624 return size; 1625 1626 unexpected_EOF: 1627 maybe_warnx("%s: unexpected end of file", file); 1628 lose: 1629 if (fd != -1) 1630 close(fd); 1631 if (zfd != -1 && zfd != STDOUT_FILENO) 1632 close(fd); 1633 return -1; 1634 } 1635 1636 #ifndef SMALL 1637 static off_t 1638 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd) 1639 { 1640 char buf[BUFLEN]; 1641 off_t in_tot; 1642 ssize_t w; 1643 1644 in_tot = count; 1645 w = write(STDOUT_FILENO, prepend, count); 1646 if (w == -1 || (size_t)w != count) { 1647 maybe_warn("write to stdout"); 1648 return -1; 1649 } 1650 for (;;) { 1651 ssize_t rv; 1652 1653 rv = read(fd, buf, sizeof buf); 1654 if (rv == 0) 1655 break; 1656 if (rv < 0) { 1657 maybe_warn("read from fd %d", fd); 1658 break; 1659 } 1660 1661 if (write(STDOUT_FILENO, buf, rv) != rv) { 1662 maybe_warn("write to stdout"); 1663 break; 1664 } 1665 in_tot += rv; 1666 } 1667 1668 if (gsizep) 1669 *gsizep = in_tot; 1670 return (in_tot); 1671 } 1672 #endif 1673 1674 static void 1675 handle_stdin(void) 1676 { 1677 unsigned char header1[4]; 1678 off_t usize, gsize; 1679 enum filetype method; 1680 ssize_t bytes_read; 1681 #ifndef NO_COMPRESS_SUPPORT 1682 FILE *in; 1683 #endif 1684 1685 #ifndef SMALL 1686 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1687 maybe_warnx("standard input is a terminal -- ignoring"); 1688 return; 1689 } 1690 #endif 1691 1692 if (lflag) { 1693 struct stat isb; 1694 1695 /* XXX could read the whole file, etc. */ 1696 if (fstat(STDIN_FILENO, &isb) < 0) { 1697 maybe_warn("fstat"); 1698 return; 1699 } 1700 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime); 1701 return; 1702 } 1703 1704 bytes_read = read_retry(STDIN_FILENO, header1, sizeof header1); 1705 if (bytes_read == -1) { 1706 maybe_warn("can't read stdin"); 1707 return; 1708 } else if (bytes_read != sizeof(header1)) { 1709 maybe_warnx("(stdin): unexpected end of file"); 1710 return; 1711 } 1712 1713 method = file_gettype(header1); 1714 switch (method) { 1715 default: 1716 #ifndef SMALL 1717 if (fflag == 0) { 1718 maybe_warnx("unknown compression format"); 1719 return; 1720 } 1721 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO); 1722 break; 1723 #endif 1724 case FT_GZIP: 1725 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1726 (char *)header1, sizeof header1, &gsize, "(stdin)"); 1727 break; 1728 #ifndef NO_BZIP2_SUPPORT 1729 case FT_BZIP2: 1730 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1731 (char *)header1, sizeof header1, &gsize); 1732 break; 1733 #endif 1734 #ifndef NO_COMPRESS_SUPPORT 1735 case FT_Z: 1736 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1737 maybe_warnx("zopen of stdin"); 1738 return; 1739 } 1740 1741 usize = zuncompress(in, stdout, (char *)header1, 1742 sizeof header1, &gsize); 1743 fclose(in); 1744 break; 1745 #endif 1746 #ifndef NO_PACK_SUPPORT 1747 case FT_PACK: 1748 usize = unpack(STDIN_FILENO, STDOUT_FILENO, 1749 (char *)header1, sizeof header1, &gsize); 1750 break; 1751 #endif 1752 #ifndef NO_XZ_SUPPORT 1753 case FT_XZ: 1754 usize = unxz(STDIN_FILENO, STDOUT_FILENO, 1755 (char *)header1, sizeof header1, &gsize); 1756 break; 1757 #endif 1758 } 1759 1760 #ifndef SMALL 1761 if (vflag && !tflag && usize != -1 && gsize != -1) 1762 print_verbage(NULL, NULL, usize, gsize); 1763 if (vflag && tflag) 1764 print_test("(stdin)", usize != -1); 1765 #endif 1766 1767 } 1768 1769 static void 1770 handle_stdout(void) 1771 { 1772 off_t gsize, usize; 1773 struct stat sb; 1774 time_t systime; 1775 uint32_t mtime; 1776 int ret; 1777 1778 #ifndef SMALL 1779 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1780 maybe_warnx("standard output is a terminal -- ignoring"); 1781 return; 1782 } 1783 #endif 1784 /* If stdin is a file use its mtime, otherwise use current time */ 1785 ret = fstat(STDIN_FILENO, &sb); 1786 1787 #ifndef SMALL 1788 if (ret < 0) { 1789 maybe_warn("Can't stat stdin"); 1790 return; 1791 } 1792 #endif 1793 1794 if (S_ISREG(sb.st_mode)) 1795 mtime = (uint32_t)sb.st_mtime; 1796 else { 1797 systime = time(NULL); 1798 #ifndef SMALL 1799 if (systime == -1) { 1800 maybe_warn("time"); 1801 return; 1802 } 1803 #endif 1804 mtime = (uint32_t)systime; 1805 } 1806 1807 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime); 1808 #ifndef SMALL 1809 if (vflag && !tflag && usize != -1 && gsize != -1) 1810 print_verbage(NULL, NULL, usize, gsize); 1811 #endif 1812 } 1813 1814 /* do what is asked for, for the path name */ 1815 static void 1816 handle_pathname(char *path) 1817 { 1818 char *opath = path, *s = NULL; 1819 ssize_t len; 1820 int slen; 1821 struct stat sb; 1822 1823 /* check for stdout/stdin */ 1824 if (path[0] == '-' && path[1] == '\0') { 1825 if (dflag) 1826 handle_stdin(); 1827 else 1828 handle_stdout(); 1829 return; 1830 } 1831 1832 retry: 1833 if (stat(path, &sb) != 0 || (fflag == 0 && cflag == 0 && 1834 lstat(path, &sb) != 0)) { 1835 /* lets try <path>.gz if we're decompressing */ 1836 if (dflag && s == NULL && errno == ENOENT) { 1837 len = strlen(path); 1838 slen = suffixes[0].ziplen; 1839 s = malloc(len + slen + 1); 1840 if (s == NULL) 1841 maybe_err("malloc"); 1842 memcpy(s, path, len); 1843 memcpy(s + len, suffixes[0].zipped, slen + 1); 1844 path = s; 1845 goto retry; 1846 } 1847 maybe_warn("can't stat: %s", opath); 1848 goto out; 1849 } 1850 1851 if (S_ISDIR(sb.st_mode)) { 1852 #ifndef SMALL 1853 if (rflag) 1854 handle_dir(path); 1855 else 1856 #endif 1857 maybe_warnx("%s is a directory", path); 1858 goto out; 1859 } 1860 1861 if (S_ISREG(sb.st_mode)) 1862 handle_file(path, &sb); 1863 else 1864 maybe_warnx("%s is not a regular file", path); 1865 1866 out: 1867 if (s) 1868 free(s); 1869 } 1870 1871 /* compress/decompress a file */ 1872 static void 1873 handle_file(char *file, struct stat *sbp) 1874 { 1875 off_t usize, gsize; 1876 char outfile[PATH_MAX]; 1877 1878 infile = file; 1879 if (dflag) { 1880 usize = file_uncompress(file, outfile, sizeof(outfile)); 1881 #ifndef SMALL 1882 if (vflag && tflag) 1883 print_test(file, usize != -1); 1884 #endif 1885 if (usize == -1) 1886 return; 1887 gsize = sbp->st_size; 1888 } else { 1889 gsize = file_compress(file, outfile, sizeof(outfile)); 1890 if (gsize == -1) 1891 return; 1892 usize = sbp->st_size; 1893 } 1894 1895 1896 #ifndef SMALL 1897 if (vflag && !tflag) 1898 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 1899 #endif 1900 } 1901 1902 #ifndef SMALL 1903 /* this is used with -r to recursively descend directories */ 1904 static void 1905 handle_dir(char *dir) 1906 { 1907 char *path_argv[2]; 1908 FTS *fts; 1909 FTSENT *entry; 1910 1911 path_argv[0] = dir; 1912 path_argv[1] = 0; 1913 fts = fts_open(path_argv, FTS_PHYSICAL | FTS_NOCHDIR, NULL); 1914 if (fts == NULL) { 1915 warn("couldn't fts_open %s", dir); 1916 return; 1917 } 1918 1919 while ((entry = fts_read(fts))) { 1920 switch(entry->fts_info) { 1921 case FTS_D: 1922 case FTS_DP: 1923 continue; 1924 1925 case FTS_DNR: 1926 case FTS_ERR: 1927 case FTS_NS: 1928 maybe_warn("%s", entry->fts_path); 1929 continue; 1930 case FTS_F: 1931 handle_file(entry->fts_path, entry->fts_statp); 1932 } 1933 } 1934 (void)fts_close(fts); 1935 } 1936 #endif 1937 1938 /* print a ratio - size reduction as a fraction of uncompressed size */ 1939 static void 1940 print_ratio(off_t in, off_t out, FILE *where) 1941 { 1942 int percent10; /* 10 * percent */ 1943 off_t diff; 1944 char buff[8]; 1945 int len; 1946 1947 diff = in - out/2; 1948 if (diff <= 0) 1949 /* 1950 * Output is more than double size of input! print -99.9% 1951 * Quite possibly we've failed to get the original size. 1952 */ 1953 percent10 = -999; 1954 else { 1955 /* 1956 * We only need 12 bits of result from the final division, 1957 * so reduce the values until a 32bit division will suffice. 1958 */ 1959 while (in > 0x100000) { 1960 diff >>= 1; 1961 in >>= 1; 1962 } 1963 if (in != 0) 1964 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 1965 else 1966 percent10 = 0; 1967 } 1968 1969 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 1970 /* Move the '.' to before the last digit */ 1971 buff[len - 1] = buff[len - 2]; 1972 buff[len - 2] = '.'; 1973 fprintf(where, "%5s%%", buff); 1974 } 1975 1976 #ifndef SMALL 1977 /* print compression statistics, and the new name (if there is one!) */ 1978 static void 1979 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 1980 { 1981 if (file) 1982 fprintf(stderr, "%s:%s ", file, 1983 strlen(file) < 7 ? "\t\t" : "\t"); 1984 print_ratio(usize, gsize, stderr); 1985 if (nfile) 1986 fprintf(stderr, " -- replaced with %s", nfile); 1987 fprintf(stderr, "\n"); 1988 fflush(stderr); 1989 } 1990 1991 /* print test results */ 1992 static void 1993 print_test(const char *file, int ok) 1994 { 1995 1996 if (exit_value == 0 && ok == 0) 1997 exit_value = 1; 1998 fprintf(stderr, "%s:%s %s\n", file, 1999 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 2000 fflush(stderr); 2001 } 2002 #endif 2003 2004 /* print a file's info ala --list */ 2005 /* eg: 2006 compressed uncompressed ratio uncompressed_name 2007 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 2008 */ 2009 static void 2010 print_list(int fd, off_t out, const char *outfile, time_t ts) 2011 { 2012 static int first = 1; 2013 #ifndef SMALL 2014 static off_t in_tot, out_tot; 2015 uint32_t crc = 0; 2016 #endif 2017 off_t in = 0, rv; 2018 2019 if (first) { 2020 #ifndef SMALL 2021 if (vflag) 2022 printf("method crc date time "); 2023 #endif 2024 if (qflag == 0) 2025 printf(" compressed uncompressed " 2026 "ratio uncompressed_name\n"); 2027 } 2028 first = 0; 2029 2030 /* print totals? */ 2031 #ifndef SMALL 2032 if (fd == -1) { 2033 in = in_tot; 2034 out = out_tot; 2035 } else 2036 #endif 2037 { 2038 /* read the last 4 bytes - this is the uncompressed size */ 2039 rv = lseek(fd, (off_t)(-8), SEEK_END); 2040 if (rv != -1) { 2041 unsigned char buf[8]; 2042 uint32_t usize; 2043 2044 rv = read(fd, (char *)buf, sizeof(buf)); 2045 if (rv == -1) 2046 maybe_warn("read of uncompressed size"); 2047 else if (rv != sizeof(buf)) 2048 maybe_warnx("read of uncompressed size"); 2049 2050 else { 2051 usize = buf[4] | buf[5] << 8 | 2052 buf[6] << 16 | buf[7] << 24; 2053 in = (off_t)usize; 2054 #ifndef SMALL 2055 crc = buf[0] | buf[1] << 8 | 2056 buf[2] << 16 | buf[3] << 24; 2057 #endif 2058 } 2059 } 2060 } 2061 2062 #ifndef SMALL 2063 if (vflag && fd == -1) 2064 printf(" "); 2065 else if (vflag) { 2066 char *date = ctime(&ts); 2067 2068 /* skip the day, 1/100th second, and year */ 2069 date += 4; 2070 date[12] = 0; 2071 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 2072 } 2073 in_tot += in; 2074 out_tot += out; 2075 #else 2076 (void)&ts; /* XXX */ 2077 #endif 2078 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 2079 print_ratio(in, out, stdout); 2080 printf(" %s\n", outfile); 2081 } 2082 2083 /* display the usage of NetBSD gzip */ 2084 static void 2085 usage(void) 2086 { 2087 2088 fprintf(stderr, "%s\n", gzip_version); 2089 fprintf(stderr, 2090 #ifdef SMALL 2091 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n", 2092 #else 2093 "usage: %s [-123456789acdfhklLNnqrtVv] [-S .suffix] [<file> [<file> ...]]\n" 2094 " -1 --fast fastest (worst) compression\n" 2095 " -2 .. -8 set compression level\n" 2096 " -9 --best best (slowest) compression\n" 2097 " -c --stdout write to stdout, keep original files\n" 2098 " --to-stdout\n" 2099 " -d --decompress uncompress files\n" 2100 " --uncompress\n" 2101 " -f --force force overwriting & compress links\n" 2102 " -h --help display this help\n" 2103 " -k --keep don't delete input files during operation\n" 2104 " -l --list list compressed file contents\n" 2105 " -N --name save or restore original file name and time stamp\n" 2106 " -n --no-name don't save original file name or time stamp\n" 2107 " -q --quiet output no warnings\n" 2108 " -r --recursive recursively compress files in directories\n" 2109 " -S .suf use suffix .suf instead of .gz\n" 2110 " --suffix .suf\n" 2111 " -t --test test compressed file\n" 2112 " -V --version display program version\n" 2113 " -v --verbose print extra statistics\n", 2114 #endif 2115 getprogname()); 2116 exit(0); 2117 } 2118 2119 #ifndef SMALL 2120 /* display the license information of FreeBSD gzip */ 2121 static void 2122 display_license(void) 2123 { 2124 2125 fprintf(stderr, "%s (based on NetBSD gzip 20150113)\n", gzip_version); 2126 fprintf(stderr, "%s\n", gzip_copyright); 2127 exit(0); 2128 } 2129 #endif 2130 2131 /* display the version of NetBSD gzip */ 2132 static void 2133 display_version(void) 2134 { 2135 2136 fprintf(stderr, "%s\n", gzip_version); 2137 exit(0); 2138 } 2139 2140 #ifndef NO_BZIP2_SUPPORT 2141 #include "unbzip2.c" 2142 #endif 2143 #ifndef NO_COMPRESS_SUPPORT 2144 #include "zuncompress.c" 2145 #endif 2146 #ifndef NO_PACK_SUPPORT 2147 #include "unpack.c" 2148 #endif 2149 #ifndef NO_XZ_SUPPORT 2150 #include "unxz.c" 2151 #endif 2152 2153 static ssize_t 2154 read_retry(int fd, void *buf, size_t sz) 2155 { 2156 char *cp = buf; 2157 size_t left = MIN(sz, (size_t) SSIZE_MAX); 2158 2159 while (left > 0) { 2160 ssize_t ret; 2161 2162 ret = read(fd, cp, left); 2163 if (ret == -1) { 2164 return ret; 2165 } else if (ret == 0) { 2166 break; /* EOF */ 2167 } 2168 cp += ret; 2169 left -= ret; 2170 } 2171 2172 return sz - left; 2173 } 2174