1 /* $NetBSD: gzip.c,v 1.113 2018/06/12 00:42:17 kamil Exp $ */ 2 3 /* 4 * Copyright (c) 1997, 1998, 2003, 2004, 2006, 2008, 2009, 2010, 2011, 2015, 2017 5 * Matthew R. Green 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 #ifndef lint 32 __COPYRIGHT("@(#) Copyright (c) 1997, 1998, 2003, 2004, 2006, 2008,\ 33 2009, 2010, 2011, 2015, 2017 Matthew R. Green. All rights reserved."); 34 __RCSID("$NetBSD: gzip.c,v 1.113 2018/06/12 00:42:17 kamil Exp $"); 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 * - handle some signals better (remove outfile?) 47 * - make bzip2/compress -v/-t/-l support work as well as possible 48 */ 49 50 #include <sys/param.h> 51 #include <sys/stat.h> 52 #include <sys/time.h> 53 54 #include <inttypes.h> 55 #include <unistd.h> 56 #include <stdio.h> 57 #include <string.h> 58 #include <stdlib.h> 59 #include <err.h> 60 #include <errno.h> 61 #include <fcntl.h> 62 #include <zlib.h> 63 #include <fts.h> 64 #include <libgen.h> 65 #include <stdarg.h> 66 #include <getopt.h> 67 #include <time.h> 68 69 #ifndef PRIdOFF 70 #define PRIdOFF PRId64 71 #endif 72 73 /* what type of file are we dealing with */ 74 enum filetype { 75 FT_GZIP, 76 #ifndef NO_BZIP2_SUPPORT 77 FT_BZIP2, 78 #endif 79 #ifndef NO_COMPRESS_SUPPORT 80 FT_Z, 81 #endif 82 #ifndef NO_PACK_SUPPORT 83 FT_PACK, 84 #endif 85 #ifndef NO_XZ_SUPPORT 86 FT_XZ, 87 #endif 88 FT_LAST, 89 FT_UNKNOWN 90 }; 91 92 #ifndef NO_BZIP2_SUPPORT 93 #include <bzlib.h> 94 95 #define BZ2_SUFFIX ".bz2" 96 #define BZIP2_MAGIC "\102\132\150" 97 #endif 98 99 #ifndef NO_COMPRESS_SUPPORT 100 #define Z_SUFFIX ".Z" 101 #define Z_MAGIC "\037\235" 102 #endif 103 104 #ifndef NO_PACK_SUPPORT 105 #define PACK_MAGIC "\037\036" 106 #endif 107 108 #ifndef NO_XZ_SUPPORT 109 #include <lzma.h> 110 #define XZ_SUFFIX ".xz" 111 #define XZ_MAGIC "\3757zXZ" 112 #endif 113 114 #define GZ_SUFFIX ".gz" 115 116 #define BUFLEN (64 * 1024) 117 118 #define GZIP_MAGIC0 0x1F 119 #define GZIP_MAGIC1 0x8B 120 #define GZIP_OMAGIC1 0x9E 121 122 #define GZIP_TIMESTAMP (off_t)4 123 #define GZIP_ORIGNAME (off_t)10 124 125 #define HEAD_CRC 0x02 126 #define EXTRA_FIELD 0x04 127 #define ORIG_NAME 0x08 128 #define COMMENT 0x10 129 130 #define OS_CODE 3 /* Unix */ 131 132 typedef struct { 133 const char *zipped; 134 int ziplen; 135 const char *normal; /* for unzip - must not be longer than zipped */ 136 } suffixes_t; 137 static suffixes_t suffixes[] = { 138 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N} 139 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */ 140 #ifndef SMALL 141 SUFFIX(GZ_SUFFIX, ""), 142 SUFFIX(".z", ""), 143 SUFFIX("-gz", ""), 144 SUFFIX("-z", ""), 145 SUFFIX("_z", ""), 146 SUFFIX(".taz", ".tar"), 147 SUFFIX(".tgz", ".tar"), 148 #ifndef NO_BZIP2_SUPPORT 149 SUFFIX(BZ2_SUFFIX, ""), 150 #endif 151 #ifndef NO_COMPRESS_SUPPORT 152 SUFFIX(Z_SUFFIX, ""), 153 #endif 154 #ifndef NO_XZ_SUPPORT 155 SUFFIX(XZ_SUFFIX, ""), 156 #endif 157 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */ 158 #endif /* SMALL */ 159 #undef SUFFIX 160 }; 161 #define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0]) 162 #define SUFFIX_MAXLEN 30 163 164 static const char gzip_version[] = "NetBSD gzip 20170803"; 165 166 static int cflag; /* stdout mode */ 167 static int dflag; /* decompress mode */ 168 static int lflag; /* list mode */ 169 static int numflag = 6; /* gzip -1..-9 value */ 170 171 #ifndef SMALL 172 static int fflag; /* force mode */ 173 static int kflag; /* don't delete input files */ 174 static int nflag; /* don't save name/timestamp */ 175 static int Nflag; /* don't restore name/timestamp */ 176 static int qflag; /* quiet mode */ 177 static int rflag; /* recursive mode */ 178 static int tflag; /* test */ 179 static int vflag; /* verbose mode */ 180 static sig_atomic_t print_info = 0; 181 #else 182 #define qflag 0 183 #define tflag 0 184 #endif 185 186 static int exit_value = 0; /* exit value */ 187 188 static const char *infile; /* name of file coming in */ 189 190 static void maybe_err(const char *fmt, ...) __printflike(1, 2) __dead; 191 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \ 192 !defined(NO_XZ_SUPPORT) 193 static void maybe_errx(const char *fmt, ...) __printflike(1, 2) __dead; 194 #endif 195 static void maybe_warn(const char *fmt, ...) __printflike(1, 2); 196 static void maybe_warnx(const char *fmt, ...) __printflike(1, 2); 197 static enum filetype file_gettype(u_char *); 198 #ifdef SMALL 199 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz) 200 #endif 201 static off_t gz_compress(int, int, off_t *, const char *, uint32_t); 202 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *); 203 static off_t file_compress(char *, char *, size_t); 204 static off_t file_uncompress(char *, char *, size_t); 205 static void handle_pathname(char *); 206 static void handle_file(char *, struct stat *); 207 static void handle_stdin(void); 208 static void handle_stdout(void); 209 static void print_ratio(off_t, off_t, FILE *); 210 static void print_list(int fd, off_t, const char *, time_t); 211 __dead static void usage(void); 212 __dead static void display_version(void); 213 static const suffixes_t *check_suffix(char *, int); 214 static ssize_t read_retry(int, void *, size_t); 215 static ssize_t write_retry(int, const void *, size_t); 216 217 #ifdef SMALL 218 #define infile_set(f,t) infile_set(f) 219 #endif 220 static void infile_set(const char *newinfile, off_t total); 221 222 #ifdef SMALL 223 #define unlink_input(f, sb) unlink(f) 224 #define check_siginfo() /* nothing */ 225 #define setup_signals() /* nothing */ 226 #define infile_newdata(t) /* nothing */ 227 #else 228 static off_t infile_total; /* total expected to read/write */ 229 static off_t infile_current; /* current read/write */ 230 231 static void check_siginfo(void); 232 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd); 233 static void prepend_gzip(char *, int *, char ***); 234 static void handle_dir(char *); 235 static void print_verbage(const char *, const char *, off_t, off_t); 236 static void print_test(const char *, int); 237 static void copymodes(int fd, const struct stat *, const char *file); 238 static int check_outfile(const char *outfile); 239 static void setup_signals(void); 240 static void infile_newdata(size_t newdata); 241 static void infile_clear(void); 242 #endif 243 244 #ifndef NO_BZIP2_SUPPORT 245 static off_t unbzip2(int, int, char *, size_t, off_t *); 246 #endif 247 248 #ifndef NO_COMPRESS_SUPPORT 249 static FILE *zdopen(int); 250 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *); 251 #endif 252 253 #ifndef NO_PACK_SUPPORT 254 static off_t unpack(int, int, char *, size_t, off_t *); 255 #endif 256 257 #ifndef NO_XZ_SUPPORT 258 static off_t unxz(int, int, char *, size_t, off_t *); 259 #endif 260 261 #ifdef SMALL 262 #define getopt_long(a,b,c,d,e) getopt(a,b,c) 263 #else 264 static const struct option longopts[] = { 265 { "stdout", no_argument, 0, 'c' }, 266 { "to-stdout", no_argument, 0, 'c' }, 267 { "decompress", no_argument, 0, 'd' }, 268 { "uncompress", no_argument, 0, 'd' }, 269 { "force", no_argument, 0, 'f' }, 270 { "help", no_argument, 0, 'h' }, 271 { "keep", no_argument, 0, 'k' }, 272 { "list", no_argument, 0, 'l' }, 273 { "no-name", no_argument, 0, 'n' }, 274 { "name", no_argument, 0, 'N' }, 275 { "quiet", no_argument, 0, 'q' }, 276 { "recursive", no_argument, 0, 'r' }, 277 { "suffix", required_argument, 0, 'S' }, 278 { "test", no_argument, 0, 't' }, 279 { "verbose", no_argument, 0, 'v' }, 280 { "version", no_argument, 0, 'V' }, 281 { "fast", no_argument, 0, '1' }, 282 { "best", no_argument, 0, '9' }, 283 #if 0 284 /* 285 * This is what else GNU gzip implements. --ascii isn't useful 286 * on NetBSD, and I don't care to have a --license. 287 */ 288 { "ascii", no_argument, 0, 'a' }, 289 { "license", no_argument, 0, 'L' }, 290 #endif 291 { NULL, no_argument, 0, 0 }, 292 }; 293 #endif 294 295 int 296 main(int argc, char **argv) 297 { 298 const char *progname = getprogname(); 299 #ifndef SMALL 300 char *gzip; 301 int len; 302 #endif 303 int ch; 304 305 setup_signals(); 306 307 #ifndef SMALL 308 if ((gzip = getenv("GZIP")) != NULL) 309 prepend_gzip(gzip, &argc, &argv); 310 #endif 311 312 /* 313 * XXX 314 * handle being called `gunzip', `zcat' and `gzcat' 315 */ 316 if (strcmp(progname, "gunzip") == 0) 317 dflag = 1; 318 else if (strcmp(progname, "zcat") == 0 || 319 strcmp(progname, "gzcat") == 0) 320 dflag = cflag = 1; 321 322 #ifdef SMALL 323 #define OPT_LIST "123456789cdhlV" 324 #else 325 #define OPT_LIST "123456789cdfhklNnqrS:tVv" 326 #endif 327 328 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) { 329 switch (ch) { 330 case '1': case '2': case '3': 331 case '4': case '5': case '6': 332 case '7': case '8': case '9': 333 numflag = ch - '0'; 334 break; 335 case 'c': 336 cflag = 1; 337 break; 338 case 'd': 339 dflag = 1; 340 break; 341 case 'l': 342 lflag = 1; 343 dflag = 1; 344 break; 345 case 'V': 346 display_version(); 347 /* NOTREACHED */ 348 #ifndef SMALL 349 case 'f': 350 fflag = 1; 351 break; 352 case 'k': 353 kflag = 1; 354 break; 355 case 'N': 356 nflag = 0; 357 Nflag = 1; 358 break; 359 case 'n': 360 nflag = 1; 361 Nflag = 0; 362 break; 363 case 'q': 364 qflag = 1; 365 break; 366 case 'r': 367 rflag = 1; 368 break; 369 case 'S': 370 len = strlen(optarg); 371 if (len != 0) { 372 if (len > SUFFIX_MAXLEN) 373 errx(1, "incorrect suffix: '%s'", optarg); 374 suffixes[0].zipped = optarg; 375 suffixes[0].ziplen = len; 376 } else { 377 suffixes[NUM_SUFFIXES - 1].zipped = ""; 378 suffixes[NUM_SUFFIXES - 1].ziplen = 0; 379 } 380 break; 381 case 't': 382 cflag = 1; 383 tflag = 1; 384 dflag = 1; 385 break; 386 case 'v': 387 vflag = 1; 388 break; 389 #endif 390 default: 391 usage(); 392 /* NOTREACHED */ 393 } 394 } 395 argv += optind; 396 argc -= optind; 397 398 if (argc == 0) { 399 if (dflag) /* stdin mode */ 400 handle_stdin(); 401 else /* stdout mode */ 402 handle_stdout(); 403 } else { 404 do { 405 handle_pathname(argv[0]); 406 } while (*++argv); 407 } 408 #ifndef SMALL 409 if (qflag == 0 && lflag && argc > 1) 410 print_list(-1, 0, "(totals)", 0); 411 #endif 412 exit(exit_value); 413 } 414 415 /* maybe print a warning */ 416 void 417 maybe_warn(const char *fmt, ...) 418 { 419 va_list ap; 420 421 if (qflag == 0) { 422 va_start(ap, fmt); 423 vwarn(fmt, ap); 424 va_end(ap); 425 } 426 if (exit_value == 0) 427 exit_value = 1; 428 } 429 430 /* ... without an errno. */ 431 void 432 maybe_warnx(const char *fmt, ...) 433 { 434 va_list ap; 435 436 if (qflag == 0) { 437 va_start(ap, fmt); 438 vwarnx(fmt, ap); 439 va_end(ap); 440 } 441 if (exit_value == 0) 442 exit_value = 1; 443 } 444 445 /* maybe print an error */ 446 void 447 maybe_err(const char *fmt, ...) 448 { 449 va_list ap; 450 451 if (qflag == 0) { 452 va_start(ap, fmt); 453 vwarn(fmt, ap); 454 va_end(ap); 455 } 456 exit(2); 457 } 458 459 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \ 460 !defined(NO_XZ_SUPPORT) 461 /* ... without an errno. */ 462 void 463 maybe_errx(const char *fmt, ...) 464 { 465 va_list ap; 466 467 if (qflag == 0) { 468 va_start(ap, fmt); 469 vwarnx(fmt, ap); 470 va_end(ap); 471 } 472 exit(2); 473 } 474 #endif 475 476 #ifndef SMALL 477 /* split up $GZIP and prepend it to the argument list */ 478 static void 479 prepend_gzip(char *gzip, int *argc, char ***argv) 480 { 481 char *s, **nargv, **ac; 482 int nenvarg = 0, i; 483 484 /* scan how many arguments there are */ 485 for (s = gzip;;) { 486 while (*s == ' ' || *s == '\t') 487 s++; 488 if (*s == 0) 489 goto count_done; 490 nenvarg++; 491 while (*s != ' ' && *s != '\t') 492 if (*s++ == 0) 493 goto count_done; 494 } 495 count_done: 496 /* punt early */ 497 if (nenvarg == 0) 498 return; 499 500 *argc += nenvarg; 501 ac = *argv; 502 503 nargv = (char **)malloc((*argc + 1) * sizeof(char *)); 504 if (nargv == NULL) 505 maybe_err("malloc"); 506 507 /* stash this away */ 508 *argv = nargv; 509 510 /* copy the program name first */ 511 i = 0; 512 nargv[i++] = *(ac++); 513 514 /* take a copy of $GZIP and add it to the array */ 515 s = strdup(gzip); 516 if (s == NULL) 517 maybe_err("strdup"); 518 for (;;) { 519 /* Skip whitespaces. */ 520 while (*s == ' ' || *s == '\t') 521 s++; 522 if (*s == 0) 523 goto copy_done; 524 nargv[i++] = s; 525 /* Find the end of this argument. */ 526 while (*s != ' ' && *s != '\t') 527 if (*s++ == 0) 528 /* Argument followed by NUL. */ 529 goto copy_done; 530 /* Terminate by overwriting ' ' or '\t' with NUL. */ 531 *s++ = 0; 532 } 533 copy_done: 534 535 /* copy the original arguments and a NULL */ 536 while (*ac) 537 nargv[i++] = *(ac++); 538 nargv[i] = NULL; 539 } 540 #endif 541 542 /* compress input to output. Return bytes read, -1 on error */ 543 static off_t 544 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime) 545 { 546 z_stream z; 547 char *outbufp, *inbufp; 548 off_t in_tot = 0, out_tot = 0; 549 ssize_t in_size; 550 int i, error; 551 uLong crc; 552 #ifdef SMALL 553 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0, 554 0, 0, 0, 0, 555 0, OS_CODE }; 556 #endif 557 558 outbufp = malloc(BUFLEN); 559 inbufp = malloc(BUFLEN); 560 if (outbufp == NULL || inbufp == NULL) { 561 maybe_err("malloc failed"); 562 goto out; 563 } 564 565 memset(&z, 0, sizeof z); 566 z.zalloc = Z_NULL; 567 z.zfree = Z_NULL; 568 z.opaque = 0; 569 570 #ifdef SMALL 571 memcpy(outbufp, header, sizeof header); 572 i = sizeof header; 573 #else 574 if (nflag != 0) { 575 mtime = 0; 576 origname = ""; 577 } 578 579 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s", 580 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 581 *origname ? ORIG_NAME : 0, 582 mtime & 0xff, 583 (mtime >> 8) & 0xff, 584 (mtime >> 16) & 0xff, 585 (mtime >> 24) & 0xff, 586 numflag == 1 ? 4 : numflag == 9 ? 2 : 0, 587 OS_CODE, origname); 588 if (i >= BUFLEN) 589 /* this need PATH_MAX > BUFLEN ... */ 590 maybe_err("snprintf"); 591 if (*origname) 592 i++; 593 #endif 594 595 z.next_out = (unsigned char *)outbufp + i; 596 z.avail_out = BUFLEN - i; 597 598 error = deflateInit2(&z, numflag, Z_DEFLATED, 599 (-MAX_WBITS), 8, Z_DEFAULT_STRATEGY); 600 if (error != Z_OK) { 601 maybe_warnx("deflateInit2 failed"); 602 in_tot = -1; 603 goto out; 604 } 605 606 crc = crc32(0L, Z_NULL, 0); 607 for (;;) { 608 if (z.avail_out == 0) { 609 if (write_retry(out, outbufp, BUFLEN) != BUFLEN) { 610 maybe_warn("write"); 611 out_tot = -1; 612 goto out; 613 } 614 615 out_tot += BUFLEN; 616 z.next_out = (unsigned char *)outbufp; 617 z.avail_out = BUFLEN; 618 } 619 620 if (z.avail_in == 0) { 621 in_size = read(in, inbufp, BUFLEN); 622 if (in_size < 0) { 623 maybe_warn("read"); 624 in_tot = -1; 625 goto out; 626 } 627 if (in_size == 0) 628 break; 629 infile_newdata(in_size); 630 631 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size); 632 in_tot += in_size; 633 z.next_in = (unsigned char *)inbufp; 634 z.avail_in = in_size; 635 } 636 637 error = deflate(&z, Z_NO_FLUSH); 638 if (error != Z_OK && error != Z_STREAM_END) { 639 maybe_warnx("deflate failed"); 640 in_tot = -1; 641 goto out; 642 } 643 } 644 645 /* clean up */ 646 for (;;) { 647 size_t len; 648 ssize_t w; 649 650 error = deflate(&z, Z_FINISH); 651 if (error != Z_OK && error != Z_STREAM_END) { 652 maybe_warnx("deflate failed"); 653 in_tot = -1; 654 goto out; 655 } 656 657 len = (char *)z.next_out - outbufp; 658 659 w = write_retry(out, outbufp, len); 660 if (w == -1 || (size_t)w != len) { 661 maybe_warn("write"); 662 out_tot = -1; 663 goto out; 664 } 665 out_tot += len; 666 z.next_out = (unsigned char *)outbufp; 667 z.avail_out = BUFLEN; 668 669 if (error == Z_STREAM_END) 670 break; 671 } 672 673 if (deflateEnd(&z) != Z_OK) { 674 maybe_warnx("deflateEnd failed"); 675 in_tot = -1; 676 goto out; 677 } 678 679 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c", 680 (int)crc & 0xff, 681 (int)(crc >> 8) & 0xff, 682 (int)(crc >> 16) & 0xff, 683 (int)(crc >> 24) & 0xff, 684 (int)in_tot & 0xff, 685 (int)(in_tot >> 8) & 0xff, 686 (int)(in_tot >> 16) & 0xff, 687 (int)(in_tot >> 24) & 0xff); 688 if (i != 8) 689 maybe_err("snprintf"); 690 #if 0 691 if (in_tot > 0xffffffff) 692 maybe_warn("input file size >= 4GB cannot be saved"); 693 #endif 694 if (write_retry(out, outbufp, i) != i) { 695 maybe_warn("write"); 696 in_tot = -1; 697 } else 698 out_tot += i; 699 700 out: 701 if (inbufp != NULL) 702 free(inbufp); 703 if (outbufp != NULL) 704 free(outbufp); 705 if (gsizep) 706 *gsizep = out_tot; 707 return in_tot; 708 } 709 710 /* 711 * uncompress input to output then close the input. return the 712 * uncompressed size written, and put the compressed sized read 713 * into `*gsizep'. 714 */ 715 static off_t 716 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep, 717 const char *filename) 718 { 719 z_stream z; 720 char *outbufp, *inbufp; 721 off_t out_tot = -1, in_tot = 0; 722 uint32_t out_sub_tot = 0; 723 enum { 724 GZSTATE_MAGIC0, 725 GZSTATE_MAGIC1, 726 GZSTATE_METHOD, 727 GZSTATE_FLAGS, 728 GZSTATE_SKIPPING, 729 GZSTATE_EXTRA, 730 GZSTATE_EXTRA2, 731 GZSTATE_EXTRA3, 732 GZSTATE_ORIGNAME, 733 GZSTATE_COMMENT, 734 GZSTATE_HEAD_CRC1, 735 GZSTATE_HEAD_CRC2, 736 GZSTATE_INIT, 737 GZSTATE_READ, 738 GZSTATE_CRC, 739 GZSTATE_LEN, 740 } state = GZSTATE_MAGIC0; 741 int flags = 0, skip_count = 0; 742 int error = Z_STREAM_ERROR, done_reading = 0; 743 uLong crc = 0; 744 ssize_t wr; 745 int needmore = 0; 746 747 #define ADVANCE() { z.next_in++; z.avail_in--; } 748 749 if ((outbufp = malloc(BUFLEN)) == NULL) { 750 maybe_err("malloc failed"); 751 goto out2; 752 } 753 if ((inbufp = malloc(BUFLEN)) == NULL) { 754 maybe_err("malloc failed"); 755 goto out1; 756 } 757 758 memset(&z, 0, sizeof z); 759 z.avail_in = prelen; 760 z.next_in = (unsigned char *)pre; 761 z.avail_out = BUFLEN; 762 z.next_out = (unsigned char *)outbufp; 763 z.zalloc = NULL; 764 z.zfree = NULL; 765 z.opaque = 0; 766 767 in_tot = prelen; 768 out_tot = 0; 769 770 for (;;) { 771 check_siginfo(); 772 if ((z.avail_in == 0 || needmore) && done_reading == 0) { 773 ssize_t in_size; 774 775 if (z.avail_in > 0) { 776 memmove(inbufp, z.next_in, z.avail_in); 777 } 778 z.next_in = (unsigned char *)inbufp; 779 in_size = read(in, z.next_in + z.avail_in, 780 BUFLEN - z.avail_in); 781 782 if (in_size == -1) { 783 maybe_warn("failed to read stdin"); 784 goto stop_and_fail; 785 } else if (in_size == 0) { 786 done_reading = 1; 787 } 788 infile_newdata(in_size); 789 790 z.avail_in += in_size; 791 needmore = 0; 792 793 in_tot += in_size; 794 } 795 if (z.avail_in == 0) { 796 if (done_reading && state != GZSTATE_MAGIC0) { 797 maybe_warnx("%s: unexpected end of file", 798 filename); 799 goto stop_and_fail; 800 } 801 goto stop; 802 } 803 switch (state) { 804 case GZSTATE_MAGIC0: 805 if (*z.next_in != GZIP_MAGIC0) { 806 if (in_tot > 0) { 807 maybe_warnx("%s: trailing garbage " 808 "ignored", filename); 809 goto stop; 810 } 811 maybe_warnx("input not gziped (MAGIC0)"); 812 exit_value = 2; 813 goto stop_and_fail; 814 } 815 ADVANCE(); 816 state++; 817 out_sub_tot = 0; 818 crc = crc32(0L, Z_NULL, 0); 819 break; 820 821 case GZSTATE_MAGIC1: 822 if (*z.next_in != GZIP_MAGIC1 && 823 *z.next_in != GZIP_OMAGIC1) { 824 maybe_warnx("input not gziped (MAGIC1)"); 825 goto stop_and_fail; 826 } 827 ADVANCE(); 828 state++; 829 break; 830 831 case GZSTATE_METHOD: 832 if (*z.next_in != Z_DEFLATED) { 833 maybe_warnx("unknown compression method"); 834 goto stop_and_fail; 835 } 836 ADVANCE(); 837 state++; 838 break; 839 840 case GZSTATE_FLAGS: 841 flags = *z.next_in; 842 ADVANCE(); 843 skip_count = 6; 844 state++; 845 break; 846 847 case GZSTATE_SKIPPING: 848 if (skip_count > 0) { 849 skip_count--; 850 ADVANCE(); 851 } else 852 state++; 853 break; 854 855 case GZSTATE_EXTRA: 856 if ((flags & EXTRA_FIELD) == 0) { 857 state = GZSTATE_ORIGNAME; 858 break; 859 } 860 skip_count = *z.next_in; 861 ADVANCE(); 862 state++; 863 break; 864 865 case GZSTATE_EXTRA2: 866 skip_count |= ((*z.next_in) << 8); 867 ADVANCE(); 868 state++; 869 break; 870 871 case GZSTATE_EXTRA3: 872 if (skip_count > 0) { 873 skip_count--; 874 ADVANCE(); 875 } else 876 state++; 877 break; 878 879 case GZSTATE_ORIGNAME: 880 if ((flags & ORIG_NAME) == 0) { 881 state++; 882 break; 883 } 884 if (*z.next_in == 0) 885 state++; 886 ADVANCE(); 887 break; 888 889 case GZSTATE_COMMENT: 890 if ((flags & COMMENT) == 0) { 891 state++; 892 break; 893 } 894 if (*z.next_in == 0) 895 state++; 896 ADVANCE(); 897 break; 898 899 case GZSTATE_HEAD_CRC1: 900 if (flags & HEAD_CRC) 901 skip_count = 2; 902 else 903 skip_count = 0; 904 state++; 905 break; 906 907 case GZSTATE_HEAD_CRC2: 908 if (skip_count > 0) { 909 skip_count--; 910 ADVANCE(); 911 } else 912 state++; 913 break; 914 915 case GZSTATE_INIT: 916 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) { 917 maybe_warnx("failed to inflateInit"); 918 goto stop_and_fail; 919 } 920 state++; 921 break; 922 923 case GZSTATE_READ: 924 error = inflate(&z, Z_FINISH); 925 switch (error) { 926 /* Z_BUF_ERROR goes with Z_FINISH... */ 927 case Z_BUF_ERROR: 928 if (z.avail_out > 0 && !done_reading) 929 continue; 930 931 case Z_STREAM_END: 932 case Z_OK: 933 break; 934 935 case Z_NEED_DICT: 936 maybe_warnx("Z_NEED_DICT error"); 937 goto stop_and_fail; 938 case Z_DATA_ERROR: 939 maybe_warnx("data stream error"); 940 goto stop_and_fail; 941 case Z_STREAM_ERROR: 942 maybe_warnx("internal stream error"); 943 goto stop_and_fail; 944 case Z_MEM_ERROR: 945 maybe_warnx("memory allocation error"); 946 goto stop_and_fail; 947 948 default: 949 maybe_warn("unknown error from inflate(): %d", 950 error); 951 } 952 wr = BUFLEN - z.avail_out; 953 954 if (wr != 0) { 955 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 956 if ( 957 #ifndef SMALL 958 /* don't write anything with -t */ 959 tflag == 0 && 960 #endif 961 write_retry(out, outbufp, wr) != wr) { 962 maybe_warn("error writing to output"); 963 goto stop_and_fail; 964 } 965 966 out_tot += wr; 967 out_sub_tot += wr; 968 } 969 970 if (error == Z_STREAM_END) { 971 inflateEnd(&z); 972 state++; 973 } 974 975 z.next_out = (unsigned char *)outbufp; 976 z.avail_out = BUFLEN; 977 978 break; 979 case GZSTATE_CRC: 980 { 981 uLong origcrc; 982 983 if (z.avail_in < 4) { 984 if (!done_reading) { 985 needmore = 1; 986 continue; 987 } 988 maybe_warnx("truncated input"); 989 goto stop_and_fail; 990 } 991 origcrc = ((unsigned)z.next_in[0] & 0xff) | 992 ((unsigned)z.next_in[1] & 0xff) << 8 | 993 ((unsigned)z.next_in[2] & 0xff) << 16 | 994 ((unsigned)z.next_in[3] & 0xff) << 24; 995 if (origcrc != crc) { 996 maybe_warnx("invalid compressed" 997 " data--crc error"); 998 goto stop_and_fail; 999 } 1000 } 1001 1002 z.avail_in -= 4; 1003 z.next_in += 4; 1004 1005 if (!z.avail_in && done_reading) { 1006 goto stop; 1007 } 1008 state++; 1009 break; 1010 case GZSTATE_LEN: 1011 { 1012 uLong origlen; 1013 1014 if (z.avail_in < 4) { 1015 if (!done_reading) { 1016 needmore = 1; 1017 continue; 1018 } 1019 maybe_warnx("truncated input"); 1020 goto stop_and_fail; 1021 } 1022 origlen = ((unsigned)z.next_in[0] & 0xff) | 1023 ((unsigned)z.next_in[1] & 0xff) << 8 | 1024 ((unsigned)z.next_in[2] & 0xff) << 16 | 1025 ((unsigned)z.next_in[3] & 0xff) << 24; 1026 1027 if (origlen != out_sub_tot) { 1028 maybe_warnx("invalid compressed" 1029 " data--length error"); 1030 goto stop_and_fail; 1031 } 1032 } 1033 1034 z.avail_in -= 4; 1035 z.next_in += 4; 1036 1037 if (error < 0) { 1038 maybe_warnx("decompression error"); 1039 goto stop_and_fail; 1040 } 1041 state = GZSTATE_MAGIC0; 1042 break; 1043 } 1044 continue; 1045 stop_and_fail: 1046 out_tot = -1; 1047 stop: 1048 break; 1049 } 1050 if (state > GZSTATE_INIT) 1051 inflateEnd(&z); 1052 1053 free(inbufp); 1054 out1: 1055 free(outbufp); 1056 out2: 1057 if (gsizep) 1058 *gsizep = in_tot; 1059 return (out_tot); 1060 } 1061 1062 #ifndef SMALL 1063 /* 1064 * set the owner, mode, flags & utimes using the given file descriptor. 1065 * file is only used in possible warning messages. 1066 */ 1067 static void 1068 copymodes(int fd, const struct stat *sbp, const char *file) 1069 { 1070 struct timeval times[2]; 1071 struct stat sb; 1072 1073 /* 1074 * If we have no info on the input, give this file some 1075 * default values and return.. 1076 */ 1077 if (sbp == NULL) { 1078 mode_t mask = umask(022); 1079 1080 (void)fchmod(fd, DEFFILEMODE & ~mask); 1081 (void)umask(mask); 1082 return; 1083 } 1084 sb = *sbp; 1085 1086 /* if the chown fails, remove set-id bits as-per compress(1) */ 1087 if (fchown(fd, sb.st_uid, sb.st_gid) < 0) { 1088 if (errno != EPERM) 1089 maybe_warn("couldn't fchown: %s", file); 1090 sb.st_mode &= ~(S_ISUID|S_ISGID); 1091 } 1092 1093 /* we only allow set-id and the 9 normal permission bits */ 1094 sb.st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1095 if (fchmod(fd, sb.st_mode) < 0) 1096 maybe_warn("couldn't fchmod: %s", file); 1097 1098 /* only try flags if they exist already */ 1099 if (sb.st_flags != 0 && fchflags(fd, sb.st_flags) < 0) 1100 maybe_warn("couldn't fchflags: %s", file); 1101 1102 TIMESPEC_TO_TIMEVAL(×[0], &sb.st_atimespec); 1103 TIMESPEC_TO_TIMEVAL(×[1], &sb.st_mtimespec); 1104 if (futimes(fd, times) < 0) 1105 maybe_warn("couldn't utimes: %s", file); 1106 } 1107 #endif 1108 1109 /* what sort of file is this? */ 1110 static enum filetype 1111 file_gettype(u_char *buf) 1112 { 1113 1114 if (buf[0] == GZIP_MAGIC0 && 1115 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1116 return FT_GZIP; 1117 else 1118 #ifndef NO_BZIP2_SUPPORT 1119 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1120 buf[3] >= '0' && buf[3] <= '9') 1121 return FT_BZIP2; 1122 else 1123 #endif 1124 #ifndef NO_COMPRESS_SUPPORT 1125 if (memcmp(buf, Z_MAGIC, 2) == 0) 1126 return FT_Z; 1127 else 1128 #endif 1129 #ifndef NO_PACK_SUPPORT 1130 if (memcmp(buf, PACK_MAGIC, 2) == 0) 1131 return FT_PACK; 1132 else 1133 #endif 1134 #ifndef NO_XZ_SUPPORT 1135 if (memcmp(buf, XZ_MAGIC, 4) == 0) /* XXX: We only have 4 bytes */ 1136 return FT_XZ; 1137 else 1138 #endif 1139 return FT_UNKNOWN; 1140 } 1141 1142 #ifndef SMALL 1143 /* check the outfile is OK. */ 1144 static int 1145 check_outfile(const char *outfile) 1146 { 1147 struct stat sb; 1148 int ok = 1; 1149 1150 if (lflag == 0 && stat(outfile, &sb) == 0) { 1151 if (fflag) 1152 unlink(outfile); 1153 else if (isatty(STDIN_FILENO)) { 1154 char ans[10] = { 'n', '\0' }; /* default */ 1155 1156 fprintf(stderr, "%s already exists -- do you wish to " 1157 "overwrite (y or n)? " , outfile); 1158 (void)fgets(ans, sizeof(ans) - 1, stdin); 1159 if (ans[0] != 'y' && ans[0] != 'Y') { 1160 fprintf(stderr, "\tnot overwriting\n"); 1161 ok = 0; 1162 } else 1163 unlink(outfile); 1164 } else { 1165 maybe_warnx("%s already exists -- skipping", outfile); 1166 ok = 0; 1167 } 1168 } 1169 return ok; 1170 } 1171 1172 static void 1173 unlink_input(const char *file, const struct stat *sb) 1174 { 1175 struct stat nsb; 1176 1177 if (kflag) 1178 return; 1179 if (stat(file, &nsb) != 0) 1180 /* Must be gone already */ 1181 return; 1182 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1183 /* Definitely a different file */ 1184 return; 1185 unlink(file); 1186 } 1187 1188 static void 1189 got_siginfo(int signo) 1190 { 1191 1192 print_info = 1; 1193 } 1194 1195 static void 1196 setup_signals(void) 1197 { 1198 1199 signal(SIGINFO, got_siginfo); 1200 } 1201 1202 static void 1203 infile_newdata(size_t newdata) 1204 { 1205 1206 infile_current += newdata; 1207 } 1208 #endif 1209 1210 static void 1211 infile_set(const char *newinfile, off_t total) 1212 { 1213 1214 if (newinfile) 1215 infile = newinfile; 1216 #ifndef SMALL 1217 infile_total = total; 1218 #endif 1219 } 1220 1221 static void 1222 infile_clear(void) 1223 { 1224 1225 infile = NULL; 1226 #ifndef SMALL 1227 infile_total = infile_current = 0; 1228 #endif 1229 } 1230 1231 static const suffixes_t * 1232 check_suffix(char *file, int xlate) 1233 { 1234 const suffixes_t *s; 1235 int len = strlen(file); 1236 char *sp; 1237 1238 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1239 /* if it doesn't fit in "a.suf", don't bother */ 1240 if (s->ziplen >= len) 1241 continue; 1242 sp = file + len - s->ziplen; 1243 if (strcmp(s->zipped, sp) != 0) 1244 continue; 1245 if (xlate) 1246 strcpy(sp, s->normal); 1247 return s; 1248 } 1249 return NULL; 1250 } 1251 1252 /* 1253 * compress the given file: create a corresponding .gz file and remove the 1254 * original. 1255 */ 1256 static off_t 1257 file_compress(char *file, char *outfile, size_t outsize) 1258 { 1259 int in; 1260 int out; 1261 off_t size, in_size; 1262 #ifndef SMALL 1263 struct stat isb, osb; 1264 const suffixes_t *suff; 1265 #endif 1266 1267 in = open(file, O_RDONLY); 1268 if (in == -1) { 1269 maybe_warn("can't open %s", file); 1270 return -1; 1271 } 1272 1273 #ifndef SMALL 1274 if (fstat(in, &isb) != 0) { 1275 close(in); 1276 maybe_warn("can't stat %s", file); 1277 return -1; 1278 } 1279 infile_set(file, isb.st_size); 1280 #endif 1281 1282 if (cflag == 0) { 1283 #ifndef SMALL 1284 if (isb.st_nlink > 1 && fflag == 0) { 1285 maybe_warnx("%s has %d other link%s -- " 1286 "skipping", file, isb.st_nlink - 1, 1287 isb.st_nlink == 1 ? "" : "s"); 1288 close(in); 1289 return -1; 1290 } 1291 1292 if (fflag == 0 && (suff = check_suffix(file, 0)) 1293 && suff->zipped[0] != 0) { 1294 maybe_warnx("%s already has %s suffix -- unchanged", 1295 file, suff->zipped); 1296 close(in); 1297 return -1; 1298 } 1299 #endif 1300 1301 /* Add (usually) .gz to filename */ 1302 if ((size_t)snprintf(outfile, outsize, "%s%s", 1303 file, suffixes[0].zipped) >= outsize) 1304 memcpy(outfile + outsize - suffixes[0].ziplen - 1, 1305 suffixes[0].zipped, suffixes[0].ziplen + 1); 1306 1307 #ifndef SMALL 1308 if (check_outfile(outfile) == 0) { 1309 close(in); 1310 return -1; 1311 } 1312 #endif 1313 } 1314 1315 if (cflag == 0) { 1316 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600); 1317 if (out == -1) { 1318 maybe_warn("could not create output: %s", outfile); 1319 fclose(stdin); 1320 return -1; 1321 } 1322 } else 1323 out = STDOUT_FILENO; 1324 1325 in_size = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1326 1327 (void)close(in); 1328 1329 /* 1330 * If there was an error, in_size will be -1. 1331 * If we compressed to stdout, just return the size. 1332 * Otherwise stat the file and check it is the correct size. 1333 * We only blow away the file if we can stat the output and it 1334 * has the expected size. 1335 */ 1336 if (cflag != 0) 1337 return in_size == -1 ? -1 : size; 1338 1339 #ifndef SMALL 1340 if (fstat(out, &osb) != 0) { 1341 maybe_warn("couldn't stat: %s", outfile); 1342 goto bad_outfile; 1343 } 1344 1345 if (osb.st_size != size) { 1346 maybe_warnx("output file: %s wrong size (%" PRIdOFF 1347 " != %" PRIdOFF "), deleting", 1348 outfile, osb.st_size, size); 1349 goto bad_outfile; 1350 } 1351 1352 copymodes(out, &isb, outfile); 1353 #endif 1354 if (close(out) == -1) 1355 maybe_warn("couldn't close output"); 1356 1357 /* output is good, ok to delete input */ 1358 unlink_input(file, &isb); 1359 return size; 1360 1361 #ifndef SMALL 1362 bad_outfile: 1363 if (close(out) == -1) 1364 maybe_warn("couldn't close output"); 1365 1366 maybe_warnx("leaving original %s", file); 1367 unlink(outfile); 1368 return size; 1369 #endif 1370 } 1371 1372 /* uncompress the given file and remove the original */ 1373 static off_t 1374 file_uncompress(char *file, char *outfile, size_t outsize) 1375 { 1376 struct stat isb, osb; 1377 off_t size; 1378 ssize_t rbytes; 1379 unsigned char header1[4]; 1380 enum filetype method; 1381 int fd, ofd, zfd = -1; 1382 size_t in_size; 1383 #ifndef SMALL 1384 ssize_t rv; 1385 time_t timestamp = 0; 1386 char name[PATH_MAX + 1]; 1387 #endif 1388 1389 /* gather the old name info */ 1390 1391 fd = open(file, O_RDONLY); 1392 if (fd < 0) { 1393 maybe_warn("can't open %s", file); 1394 goto lose; 1395 } 1396 if (fstat(fd, &isb) != 0) { 1397 close(fd); 1398 maybe_warn("can't stat %s", file); 1399 goto lose; 1400 } 1401 if (S_ISREG(isb.st_mode)) 1402 in_size = isb.st_size; 1403 else 1404 in_size = 0; 1405 infile_set(file, in_size); 1406 1407 strlcpy(outfile, file, outsize); 1408 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1409 maybe_warnx("%s: unknown suffix -- ignored", file); 1410 goto lose; 1411 } 1412 1413 rbytes = read(fd, header1, sizeof header1); 1414 if (rbytes != sizeof header1) { 1415 /* we don't want to fail here. */ 1416 #ifndef SMALL 1417 if (fflag) 1418 goto lose; 1419 #endif 1420 if (rbytes == -1) 1421 maybe_warn("can't read %s", file); 1422 else 1423 goto unexpected_EOF; 1424 goto lose; 1425 } 1426 infile_newdata(rbytes); 1427 1428 method = file_gettype(header1); 1429 #ifndef SMALL 1430 if (fflag == 0 && method == FT_UNKNOWN) { 1431 maybe_warnx("%s: not in gzip format", file); 1432 goto lose; 1433 } 1434 1435 #endif 1436 1437 #ifndef SMALL 1438 if (method == FT_GZIP && Nflag) { 1439 unsigned char ts[4]; /* timestamp */ 1440 1441 rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP); 1442 if (rv >= 0 && rv < (ssize_t)(sizeof ts)) 1443 goto unexpected_EOF; 1444 if (rv == -1) { 1445 if (!fflag) 1446 maybe_warn("can't read %s", file); 1447 goto lose; 1448 } 1449 infile_newdata(rv); 1450 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0]; 1451 1452 if (header1[3] & ORIG_NAME) { 1453 rbytes = pread(fd, name, sizeof(name) - 1, GZIP_ORIGNAME); 1454 if (rbytes < 0) { 1455 maybe_warn("can't read %s", file); 1456 goto lose; 1457 } 1458 if (name[0] != '\0') { 1459 char *dp, *nf; 1460 1461 /* Make sure that name is NUL-terminated */ 1462 name[rbytes] = '\0'; 1463 1464 /* strip saved directory name */ 1465 nf = strrchr(name, '/'); 1466 if (nf == NULL) 1467 nf = name; 1468 else 1469 nf++; 1470 1471 /* preserve original directory name */ 1472 dp = strrchr(file, '/'); 1473 if (dp == NULL) 1474 dp = file; 1475 else 1476 dp++; 1477 snprintf(outfile, outsize, "%.*s%.*s", 1478 (int) (dp - file), 1479 file, (int) rbytes, nf); 1480 } 1481 } 1482 } 1483 #endif 1484 lseek(fd, 0, SEEK_SET); 1485 1486 if (cflag == 0 || lflag) { 1487 #ifndef SMALL 1488 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1489 maybe_warnx("%s has %d other links -- skipping", 1490 file, isb.st_nlink - 1); 1491 goto lose; 1492 } 1493 if (nflag == 0 && timestamp) 1494 isb.st_mtime = timestamp; 1495 if (check_outfile(outfile) == 0) 1496 goto lose; 1497 #endif 1498 } 1499 1500 if (cflag) 1501 zfd = STDOUT_FILENO; 1502 else if (lflag) 1503 zfd = -1; 1504 else { 1505 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1506 if (zfd == STDOUT_FILENO) { 1507 /* We won't close STDOUT_FILENO later... */ 1508 zfd = dup(zfd); 1509 close(STDOUT_FILENO); 1510 } 1511 if (zfd == -1) { 1512 maybe_warn("can't open %s", outfile); 1513 goto lose; 1514 } 1515 } 1516 1517 switch (method) { 1518 #ifndef NO_BZIP2_SUPPORT 1519 case FT_BZIP2: 1520 /* XXX */ 1521 if (lflag) { 1522 maybe_warnx("no -l with bzip2 files"); 1523 goto lose; 1524 } 1525 1526 size = unbzip2(fd, zfd, NULL, 0, NULL); 1527 break; 1528 #endif 1529 1530 #ifndef NO_COMPRESS_SUPPORT 1531 case FT_Z: { 1532 FILE *in, *out; 1533 1534 /* XXX */ 1535 if (lflag) { 1536 maybe_warnx("no -l with Lempel-Ziv files"); 1537 goto lose; 1538 } 1539 1540 if ((in = zdopen(fd)) == NULL) { 1541 maybe_warn("zdopen for read: %s", file); 1542 goto lose; 1543 } 1544 1545 out = fdopen(dup(zfd), "w"); 1546 if (out == NULL) { 1547 maybe_warn("fdopen for write: %s", outfile); 1548 fclose(in); 1549 goto lose; 1550 } 1551 1552 size = zuncompress(in, out, NULL, 0, NULL); 1553 /* need to fclose() if ferror() is true... */ 1554 if (ferror(in) | fclose(in)) { 1555 maybe_warn("failed infile fclose"); 1556 unlink(outfile); 1557 (void)fclose(out); 1558 } 1559 if (fclose(out) != 0) { 1560 maybe_warn("failed outfile fclose"); 1561 unlink(outfile); 1562 goto lose; 1563 } 1564 break; 1565 } 1566 #endif 1567 1568 #ifndef NO_PACK_SUPPORT 1569 case FT_PACK: 1570 if (lflag) { 1571 maybe_warnx("no -l with packed files"); 1572 goto lose; 1573 } 1574 1575 size = unpack(fd, zfd, NULL, 0, NULL); 1576 break; 1577 #endif 1578 1579 #ifndef NO_XZ_SUPPORT 1580 case FT_XZ: 1581 if (lflag) { 1582 maybe_warnx("no -l with xz files"); 1583 goto lose; 1584 } 1585 1586 size = unxz(fd, zfd, NULL, 0, NULL); 1587 break; 1588 #endif 1589 1590 #ifndef SMALL 1591 case FT_UNKNOWN: 1592 if (lflag) { 1593 maybe_warnx("no -l for unknown filetypes"); 1594 goto lose; 1595 } 1596 size = cat_fd(NULL, 0, NULL, fd); 1597 break; 1598 #endif 1599 default: 1600 if (lflag) { 1601 print_list(fd, in_size, outfile, isb.st_mtime); 1602 close(fd); 1603 return -1; /* XXX */ 1604 } 1605 1606 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1607 break; 1608 } 1609 1610 if (close(fd) != 0) 1611 maybe_warn("couldn't close input"); 1612 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1613 maybe_warn("couldn't close output"); 1614 1615 if (size == -1) { 1616 if (cflag == 0) 1617 unlink(outfile); 1618 maybe_warnx("%s: uncompress failed", file); 1619 return -1; 1620 } 1621 1622 /* if testing, or we uncompressed to stdout, this is all we need */ 1623 #ifndef SMALL 1624 if (tflag) 1625 return size; 1626 #endif 1627 /* if we are uncompressing to stdin, don't remove the file. */ 1628 if (cflag) 1629 return size; 1630 1631 /* 1632 * if we create a file... 1633 */ 1634 /* 1635 * if we can't stat the file don't remove the file. 1636 */ 1637 1638 ofd = open(outfile, O_RDWR, 0); 1639 if (ofd == -1) { 1640 maybe_warn("couldn't open (leaving original): %s", 1641 outfile); 1642 return -1; 1643 } 1644 if (fstat(ofd, &osb) != 0) { 1645 maybe_warn("couldn't stat (leaving original): %s", 1646 outfile); 1647 close(ofd); 1648 return -1; 1649 } 1650 if (osb.st_size != size) { 1651 maybe_warnx("stat gave different size: %" PRIdOFF 1652 " != %" PRIdOFF " (leaving original)", 1653 size, osb.st_size); 1654 close(ofd); 1655 unlink(outfile); 1656 return -1; 1657 } 1658 unlink_input(file, &isb); 1659 #ifndef SMALL 1660 copymodes(ofd, &isb, outfile); 1661 #endif 1662 close(ofd); 1663 return size; 1664 1665 unexpected_EOF: 1666 maybe_warnx("%s: unexpected end of file", file); 1667 lose: 1668 if (fd != -1) 1669 close(fd); 1670 if (zfd != -1 && zfd != STDOUT_FILENO) 1671 close(fd); 1672 return -1; 1673 } 1674 1675 #ifndef SMALL 1676 static void 1677 check_siginfo(void) 1678 { 1679 if (print_info == 0) 1680 return; 1681 if (infile) { 1682 if (infile_total) { 1683 int pcent = (int)((100.0 * infile_current) / infile_total); 1684 1685 fprintf(stderr, "%s: done %llu/%llu bytes %d%%\n", 1686 infile, (unsigned long long)infile_current, 1687 (unsigned long long)infile_total, pcent); 1688 } else 1689 fprintf(stderr, "%s: done %llu bytes\n", 1690 infile, (unsigned long long)infile_current); 1691 } 1692 print_info = 0; 1693 } 1694 1695 static off_t 1696 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd) 1697 { 1698 char buf[BUFLEN]; 1699 off_t in_tot; 1700 ssize_t w; 1701 1702 in_tot = count; 1703 w = write_retry(STDOUT_FILENO, prepend, count); 1704 if (w == -1 || (size_t)w != count) { 1705 maybe_warn("write to stdout"); 1706 return -1; 1707 } 1708 for (;;) { 1709 ssize_t rv; 1710 1711 rv = read(fd, buf, sizeof buf); 1712 if (rv == 0) 1713 break; 1714 if (rv < 0) { 1715 maybe_warn("read from fd %d", fd); 1716 break; 1717 } 1718 infile_newdata(rv); 1719 1720 if (write_retry(STDOUT_FILENO, buf, rv) != rv) { 1721 maybe_warn("write to stdout"); 1722 break; 1723 } 1724 in_tot += rv; 1725 } 1726 1727 if (gsizep) 1728 *gsizep = in_tot; 1729 return (in_tot); 1730 } 1731 #endif 1732 1733 static void 1734 handle_stdin(void) 1735 { 1736 struct stat isb; 1737 unsigned char header1[4]; 1738 size_t in_size; 1739 off_t usize, gsize; 1740 enum filetype method; 1741 ssize_t bytes_read; 1742 #ifndef NO_COMPRESS_SUPPORT 1743 FILE *in; 1744 #endif 1745 1746 #ifndef SMALL 1747 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1748 maybe_warnx("standard input is a terminal -- ignoring"); 1749 goto out; 1750 } 1751 #endif 1752 1753 if (fstat(STDIN_FILENO, &isb) < 0) { 1754 maybe_warn("fstat"); 1755 goto out; 1756 } 1757 if (S_ISREG(isb.st_mode)) 1758 in_size = isb.st_size; 1759 else 1760 in_size = 0; 1761 infile_set("(stdin)", in_size); 1762 1763 if (lflag) { 1764 print_list(STDIN_FILENO, in_size, infile, isb.st_mtime); 1765 goto out; 1766 } 1767 1768 bytes_read = read_retry(STDIN_FILENO, header1, sizeof header1); 1769 if (bytes_read == -1) { 1770 maybe_warn("can't read stdin"); 1771 goto out; 1772 } else if (bytes_read != sizeof(header1)) { 1773 maybe_warnx("(stdin): unexpected end of file"); 1774 goto out; 1775 } 1776 1777 method = file_gettype(header1); 1778 switch (method) { 1779 default: 1780 #ifndef SMALL 1781 if (fflag == 0) { 1782 maybe_warnx("unknown compression format"); 1783 goto out; 1784 } 1785 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO); 1786 break; 1787 #endif 1788 case FT_GZIP: 1789 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1790 (char *)header1, sizeof header1, &gsize, "(stdin)"); 1791 break; 1792 #ifndef NO_BZIP2_SUPPORT 1793 case FT_BZIP2: 1794 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1795 (char *)header1, sizeof header1, &gsize); 1796 break; 1797 #endif 1798 #ifndef NO_COMPRESS_SUPPORT 1799 case FT_Z: 1800 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1801 maybe_warnx("zopen of stdin"); 1802 goto out; 1803 } 1804 1805 usize = zuncompress(in, stdout, (char *)header1, 1806 sizeof header1, &gsize); 1807 fclose(in); 1808 break; 1809 #endif 1810 #ifndef NO_PACK_SUPPORT 1811 case FT_PACK: 1812 usize = unpack(STDIN_FILENO, STDOUT_FILENO, 1813 (char *)header1, sizeof header1, &gsize); 1814 break; 1815 #endif 1816 #ifndef NO_XZ_SUPPORT 1817 case FT_XZ: 1818 usize = unxz(STDIN_FILENO, STDOUT_FILENO, 1819 (char *)header1, sizeof header1, &gsize); 1820 break; 1821 #endif 1822 } 1823 1824 #ifndef SMALL 1825 if (vflag && !tflag && usize != -1 && gsize != -1) 1826 print_verbage(NULL, NULL, usize, gsize); 1827 if (vflag && tflag) 1828 print_test("(stdin)", usize != -1); 1829 #else 1830 (void)&usize; 1831 #endif 1832 1833 out: 1834 infile_clear(); 1835 } 1836 1837 static void 1838 handle_stdout(void) 1839 { 1840 off_t gsize; 1841 #ifndef SMALL 1842 off_t usize; 1843 struct stat sb; 1844 time_t systime; 1845 uint32_t mtime; 1846 int ret; 1847 1848 infile_set("(stdout)", 0); 1849 1850 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1851 maybe_warnx("standard output is a terminal -- ignoring"); 1852 return; 1853 } 1854 1855 /* If stdin is a file use its mtime, otherwise use current time */ 1856 ret = fstat(STDIN_FILENO, &sb); 1857 if (ret < 0) { 1858 maybe_warn("Can't stat stdin"); 1859 return; 1860 } 1861 1862 if (S_ISREG(sb.st_mode)) { 1863 infile_set("(stdout)", sb.st_size); 1864 mtime = (uint32_t)sb.st_mtime; 1865 } else { 1866 systime = time(NULL); 1867 if (systime == -1) { 1868 maybe_warn("time"); 1869 return; 1870 } 1871 mtime = (uint32_t)systime; 1872 } 1873 1874 usize = 1875 #endif 1876 gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime); 1877 #ifndef SMALL 1878 if (vflag && !tflag && usize != -1 && gsize != -1) 1879 print_verbage(NULL, NULL, usize, gsize); 1880 #endif 1881 } 1882 1883 /* do what is asked for, for the path name */ 1884 static void 1885 handle_pathname(char *path) 1886 { 1887 char *opath = path, *s = NULL; 1888 ssize_t len; 1889 int slen; 1890 struct stat sb; 1891 1892 /* check for stdout/stdin */ 1893 if (path[0] == '-' && path[1] == '\0') { 1894 if (dflag) 1895 handle_stdin(); 1896 else 1897 handle_stdout(); 1898 return; 1899 } 1900 1901 retry: 1902 if (stat(path, &sb) != 0) { 1903 /* lets try <path>.gz if we're decompressing */ 1904 if (dflag && s == NULL && errno == ENOENT) { 1905 len = strlen(path); 1906 slen = suffixes[0].ziplen; 1907 s = malloc(len + slen + 1); 1908 if (s == NULL) 1909 maybe_err("malloc"); 1910 memcpy(s, path, len); 1911 memcpy(s + len, suffixes[0].zipped, slen + 1); 1912 path = s; 1913 goto retry; 1914 } 1915 maybe_warn("can't stat: %s", opath); 1916 goto out; 1917 } 1918 1919 if (S_ISDIR(sb.st_mode)) { 1920 #ifndef SMALL 1921 if (rflag) 1922 handle_dir(path); 1923 else 1924 #endif 1925 maybe_warnx("%s is a directory", path); 1926 goto out; 1927 } 1928 1929 if (S_ISREG(sb.st_mode)) 1930 handle_file(path, &sb); 1931 else 1932 maybe_warnx("%s is not a regular file", path); 1933 1934 out: 1935 if (s) 1936 free(s); 1937 } 1938 1939 /* compress/decompress a file */ 1940 static void 1941 handle_file(char *file, struct stat *sbp) 1942 { 1943 off_t usize, gsize; 1944 char outfile[PATH_MAX]; 1945 1946 infile_set(file, sbp->st_size); 1947 if (dflag) { 1948 usize = file_uncompress(file, outfile, sizeof(outfile)); 1949 #ifndef SMALL 1950 if (vflag && tflag) 1951 print_test(file, usize != -1); 1952 #endif 1953 if (usize == -1) 1954 return; 1955 gsize = sbp->st_size; 1956 } else { 1957 gsize = file_compress(file, outfile, sizeof(outfile)); 1958 if (gsize == -1) 1959 return; 1960 usize = sbp->st_size; 1961 } 1962 infile_clear(); 1963 1964 #ifndef SMALL 1965 if (vflag && !tflag) 1966 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 1967 #endif 1968 } 1969 1970 #ifndef SMALL 1971 /* this is used with -r to recursively descend directories */ 1972 static void 1973 handle_dir(char *dir) 1974 { 1975 char *path_argv[2]; 1976 FTS *fts; 1977 FTSENT *entry; 1978 1979 path_argv[0] = dir; 1980 path_argv[1] = 0; 1981 fts = fts_open(path_argv, FTS_PHYSICAL, NULL); 1982 if (fts == NULL) { 1983 warn("couldn't fts_open %s", dir); 1984 return; 1985 } 1986 1987 while ((entry = fts_read(fts))) { 1988 switch(entry->fts_info) { 1989 case FTS_D: 1990 case FTS_DP: 1991 continue; 1992 1993 case FTS_DNR: 1994 case FTS_ERR: 1995 case FTS_NS: 1996 maybe_warn("%s", entry->fts_path); 1997 continue; 1998 case FTS_F: 1999 handle_file(entry->fts_name, entry->fts_statp); 2000 } 2001 } 2002 (void)fts_close(fts); 2003 } 2004 #endif 2005 2006 /* print a ratio - size reduction as a fraction of uncompressed size */ 2007 static void 2008 print_ratio(off_t in, off_t out, FILE *where) 2009 { 2010 int percent10; /* 10 * percent */ 2011 off_t diff; 2012 char buff[8]; 2013 int len; 2014 2015 diff = in - out/2; 2016 if (in == 0 && out == 0) 2017 percent10 = 0; 2018 else if (diff < 0) 2019 /* 2020 * Output is more than double size of input! print -99.9% 2021 * Quite possibly we've failed to get the original size. 2022 */ 2023 percent10 = -999; 2024 else { 2025 /* 2026 * We only need 12 bits of result from the final division, 2027 * so reduce the values until a 32bit division will suffice. 2028 */ 2029 while (in > 0x100000) { 2030 diff >>= 1; 2031 in >>= 1; 2032 } 2033 if (in != 0) 2034 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 2035 else 2036 percent10 = 0; 2037 } 2038 2039 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 2040 /* Move the '.' to before the last digit */ 2041 buff[len - 1] = buff[len - 2]; 2042 buff[len - 2] = '.'; 2043 fprintf(where, "%5s%%", buff); 2044 } 2045 2046 #ifndef SMALL 2047 /* print compression statistics, and the new name (if there is one!) */ 2048 static void 2049 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 2050 { 2051 if (file) 2052 fprintf(stderr, "%s:%s ", file, 2053 strlen(file) < 7 ? "\t\t" : "\t"); 2054 print_ratio(usize, gsize, stderr); 2055 if (nfile) 2056 fprintf(stderr, " -- replaced with %s", nfile); 2057 fprintf(stderr, "\n"); 2058 fflush(stderr); 2059 } 2060 2061 /* print test results */ 2062 static void 2063 print_test(const char *file, int ok) 2064 { 2065 2066 if (exit_value == 0 && ok == 0) 2067 exit_value = 1; 2068 fprintf(stderr, "%s:%s %s\n", file, 2069 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 2070 fflush(stderr); 2071 } 2072 #endif 2073 2074 /* print a file's info ala --list */ 2075 /* eg: 2076 compressed uncompressed ratio uncompressed_name 2077 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 2078 */ 2079 static void 2080 print_list(int fd, off_t out, const char *outfile, time_t ts) 2081 { 2082 static int first = 1; 2083 #ifndef SMALL 2084 static off_t in_tot, out_tot; 2085 uint32_t crc = 0; 2086 #endif 2087 off_t in = 0, rv; 2088 2089 if (first) { 2090 #ifndef SMALL 2091 if (vflag) 2092 printf("method crc date time "); 2093 #endif 2094 if (qflag == 0) 2095 printf(" compressed uncompressed " 2096 "ratio uncompressed_name\n"); 2097 } 2098 first = 0; 2099 2100 /* print totals? */ 2101 #ifndef SMALL 2102 if (fd == -1) { 2103 in = in_tot; 2104 out = out_tot; 2105 } else 2106 #endif 2107 { 2108 /* read the last 4 bytes - this is the uncompressed size */ 2109 rv = lseek(fd, (off_t)(-8), SEEK_END); 2110 if (rv != -1) { 2111 unsigned char buf[8]; 2112 uint32_t usize; 2113 2114 rv = read(fd, (char *)buf, sizeof(buf)); 2115 if (rv == -1) 2116 maybe_warn("read of uncompressed size"); 2117 else if (rv != sizeof(buf)) 2118 maybe_warnx("read of uncompressed size"); 2119 2120 else { 2121 usize = buf[4]; 2122 usize |= (unsigned int)buf[5] << 8; 2123 usize |= (unsigned int)buf[6] << 16; 2124 usize |= (unsigned int)buf[7] << 24; 2125 in = (off_t)usize; 2126 #ifndef SMALL 2127 crc = buf[0]; 2128 crc |= (unsigned int)buf[1] << 8; 2129 crc |= (unsigned int)buf[2] << 16; 2130 crc |= (unsigned int)buf[3] << 24; 2131 #endif 2132 } 2133 } 2134 } 2135 2136 #ifndef SMALL 2137 if (vflag && fd == -1) 2138 printf(" "); 2139 else if (vflag) { 2140 char *date = ctime(&ts); 2141 2142 /* skip the day, 1/100th second, and year */ 2143 date += 4; 2144 date[12] = 0; 2145 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 2146 } 2147 in_tot += in; 2148 out_tot += out; 2149 #endif 2150 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 2151 print_ratio(in, out, stdout); 2152 printf(" %s\n", outfile); 2153 } 2154 2155 /* display the usage of NetBSD gzip */ 2156 static void 2157 usage(void) 2158 { 2159 2160 fprintf(stderr, "%s\n", gzip_version); 2161 fprintf(stderr, 2162 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n" 2163 #ifndef SMALL 2164 " -1 --fast fastest (worst) compression\n" 2165 " -2 .. -8 set compression level\n" 2166 " -9 --best best (slowest) compression\n" 2167 " -c --stdout write to stdout, keep original files\n" 2168 " --to-stdout\n" 2169 " -d --decompress uncompress files\n" 2170 " --uncompress\n" 2171 " -f --force force overwriting & compress links\n" 2172 " -h --help display this help\n" 2173 " -k --keep don't delete input files during operation\n" 2174 " -l --list list compressed file contents\n" 2175 " -N --name save or restore original file name and time stamp\n" 2176 " -n --no-name don't save original file name or time stamp\n" 2177 " -q --quiet output no warnings\n" 2178 " -r --recursive recursively compress files in directories\n" 2179 " -S .suf use suffix .suf instead of .gz\n" 2180 " --suffix .suf\n" 2181 " -t --test test compressed file\n" 2182 " -V --version display program version\n" 2183 " -v --verbose print extra statistics\n", 2184 #else 2185 , 2186 #endif 2187 getprogname()); 2188 exit(0); 2189 } 2190 2191 /* display the version of NetBSD gzip */ 2192 static void 2193 display_version(void) 2194 { 2195 2196 fprintf(stderr, "%s\n", gzip_version); 2197 exit(0); 2198 } 2199 2200 #ifndef NO_BZIP2_SUPPORT 2201 #include "unbzip2.c" 2202 #endif 2203 #ifndef NO_COMPRESS_SUPPORT 2204 #include "zuncompress.c" 2205 #endif 2206 #ifndef NO_PACK_SUPPORT 2207 #include "unpack.c" 2208 #endif 2209 #ifndef NO_XZ_SUPPORT 2210 #include "unxz.c" 2211 #endif 2212 2213 static ssize_t 2214 read_retry(int fd, void *buf, size_t sz) 2215 { 2216 char *cp = buf; 2217 size_t left = MIN(sz, (size_t) SSIZE_MAX); 2218 2219 while (left > 0) { 2220 ssize_t ret; 2221 2222 ret = read(fd, cp, left); 2223 if (ret == -1) { 2224 return ret; 2225 } else if (ret == 0) { 2226 break; /* EOF */ 2227 } 2228 cp += ret; 2229 left -= ret; 2230 } 2231 2232 return sz - left; 2233 } 2234 2235 static ssize_t 2236 write_retry(int fd, const void *buf, size_t sz) 2237 { 2238 const char *cp = buf; 2239 size_t left = MIN(sz, (size_t) SSIZE_MAX); 2240 2241 while (left > 0) { 2242 ssize_t ret; 2243 2244 ret = write(fd, cp, left); 2245 if (ret == -1) { 2246 return ret; 2247 } else if (ret == 0) { 2248 abort(); /* Can't happen */ 2249 } 2250 cp += ret; 2251 left -= ret; 2252 } 2253 2254 return sz - left; 2255 } 2256