1 /* $NetBSD: gzip.c,v 1.116 2018/10/27 11:39:12 skrll 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 1.116 2018/10/27 11:39:12 skrll 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 #ifndef NO_LZ_SUPPORT 89 FT_LZ, 90 #endif 91 FT_LAST, 92 FT_UNKNOWN 93 }; 94 95 #ifndef NO_BZIP2_SUPPORT 96 #include <bzlib.h> 97 98 #define BZ2_SUFFIX ".bz2" 99 #define BZIP2_MAGIC "\102\132\150" 100 #endif 101 102 #ifndef NO_COMPRESS_SUPPORT 103 #define Z_SUFFIX ".Z" 104 #define Z_MAGIC "\037\235" 105 #endif 106 107 #ifndef NO_PACK_SUPPORT 108 #define PACK_MAGIC "\037\036" 109 #endif 110 111 #ifndef NO_XZ_SUPPORT 112 #include <lzma.h> 113 #define XZ_SUFFIX ".xz" 114 #define XZ_MAGIC "\3757zXZ" 115 #endif 116 117 #ifndef NO_LZ_SUPPORT 118 #define LZ_SUFFIX ".lz" 119 #define LZ_MAGIC "LZIP" 120 #endif 121 122 #define GZ_SUFFIX ".gz" 123 124 #define BUFLEN (64 * 1024) 125 126 #define GZIP_MAGIC0 0x1F 127 #define GZIP_MAGIC1 0x8B 128 #define GZIP_OMAGIC1 0x9E 129 130 #define GZIP_TIMESTAMP (off_t)4 131 #define GZIP_ORIGNAME (off_t)10 132 133 #define HEAD_CRC 0x02 134 #define EXTRA_FIELD 0x04 135 #define ORIG_NAME 0x08 136 #define COMMENT 0x10 137 138 #define OS_CODE 3 /* Unix */ 139 140 typedef struct { 141 const char *zipped; 142 int ziplen; 143 const char *normal; /* for unzip - must not be longer than zipped */ 144 } suffixes_t; 145 static suffixes_t suffixes[] = { 146 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N} 147 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */ 148 #ifndef SMALL 149 SUFFIX(GZ_SUFFIX, ""), 150 SUFFIX(".z", ""), 151 SUFFIX("-gz", ""), 152 SUFFIX("-z", ""), 153 SUFFIX("_z", ""), 154 SUFFIX(".taz", ".tar"), 155 SUFFIX(".tgz", ".tar"), 156 #ifndef NO_BZIP2_SUPPORT 157 SUFFIX(BZ2_SUFFIX, ""), 158 #endif 159 #ifndef NO_COMPRESS_SUPPORT 160 SUFFIX(Z_SUFFIX, ""), 161 #endif 162 #ifndef NO_XZ_SUPPORT 163 SUFFIX(XZ_SUFFIX, ""), 164 #endif 165 #ifndef NO_LZ_SUPPORT 166 SUFFIX(LZ_SUFFIX, ""), 167 #endif 168 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */ 169 #endif /* SMALL */ 170 #undef SUFFIX 171 }; 172 #define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0]) 173 #define SUFFIX_MAXLEN 30 174 175 static const char gzip_version[] = "NetBSD gzip 20170803"; 176 177 static int cflag; /* stdout mode */ 178 static int dflag; /* decompress mode */ 179 static int lflag; /* list mode */ 180 static int numflag = 6; /* gzip -1..-9 value */ 181 182 #ifndef SMALL 183 static int fflag; /* force mode */ 184 static int kflag; /* don't delete input files */ 185 static int nflag; /* don't save name/timestamp */ 186 static int Nflag; /* don't restore name/timestamp */ 187 static int qflag; /* quiet mode */ 188 static int rflag; /* recursive mode */ 189 static int tflag; /* test */ 190 static int vflag; /* verbose mode */ 191 static sig_atomic_t print_info = 0; 192 #else 193 #define qflag 0 194 #define tflag 0 195 #endif 196 197 static int exit_value = 0; /* exit value */ 198 199 static const char *infile; /* name of file coming in */ 200 201 static void maybe_err(const char *fmt, ...) __printflike(1, 2) __dead; 202 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \ 203 !defined(NO_XZ_SUPPORT) 204 static void maybe_errx(const char *fmt, ...) __printflike(1, 2) __dead; 205 #endif 206 static void maybe_warn(const char *fmt, ...) __printflike(1, 2); 207 static void maybe_warnx(const char *fmt, ...) __printflike(1, 2); 208 static enum filetype file_gettype(u_char *); 209 #ifdef SMALL 210 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz) 211 #endif 212 static off_t gz_compress(int, int, off_t *, const char *, uint32_t); 213 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *); 214 static off_t file_compress(char *, char *, size_t); 215 static off_t file_uncompress(char *, char *, size_t); 216 static void handle_pathname(char *); 217 static void handle_file(char *, struct stat *); 218 static void handle_stdin(void); 219 static void handle_stdout(void); 220 static void print_ratio(off_t, off_t, FILE *); 221 static void print_list(int fd, off_t, const char *, time_t); 222 __dead static void usage(void); 223 __dead static void display_version(void); 224 static const suffixes_t *check_suffix(char *, int); 225 static ssize_t read_retry(int, void *, size_t); 226 static ssize_t write_retry(int, const void *, size_t); 227 static void print_list_out(off_t, off_t, const char*); 228 229 #ifdef SMALL 230 #define infile_set(f,t) infile_set(f) 231 #endif 232 static void infile_set(const char *newinfile, off_t total); 233 234 #ifdef SMALL 235 #define unlink_input(f, sb) unlink(f) 236 #define check_siginfo() /* nothing */ 237 #define setup_signals() /* nothing */ 238 #define infile_newdata(t) /* nothing */ 239 #else 240 static off_t infile_total; /* total expected to read/write */ 241 static off_t infile_current; /* current read/write */ 242 243 static void check_siginfo(void); 244 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd); 245 static void prepend_gzip(char *, int *, char ***); 246 static void handle_dir(char *); 247 static void print_verbage(const char *, const char *, off_t, off_t); 248 static void print_test(const char *, int); 249 static void copymodes(int fd, const struct stat *, const char *file); 250 static int check_outfile(const char *outfile); 251 static void setup_signals(void); 252 static void infile_newdata(size_t newdata); 253 static void infile_clear(void); 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 static off_t unxz_len(int); 272 #endif 273 274 #ifndef NO_LZ_SUPPORT 275 static off_t unlz(int, int, char *, size_t, off_t *); 276 #endif 277 278 #ifdef SMALL 279 #define getopt_long(a,b,c,d,e) getopt(a,b,c) 280 #else 281 static const struct option longopts[] = { 282 { "stdout", no_argument, 0, 'c' }, 283 { "to-stdout", no_argument, 0, 'c' }, 284 { "decompress", no_argument, 0, 'd' }, 285 { "uncompress", no_argument, 0, 'd' }, 286 { "force", no_argument, 0, 'f' }, 287 { "help", no_argument, 0, 'h' }, 288 { "keep", no_argument, 0, 'k' }, 289 { "list", no_argument, 0, 'l' }, 290 { "no-name", no_argument, 0, 'n' }, 291 { "name", no_argument, 0, 'N' }, 292 { "quiet", no_argument, 0, 'q' }, 293 { "recursive", no_argument, 0, 'r' }, 294 { "suffix", required_argument, 0, 'S' }, 295 { "test", no_argument, 0, 't' }, 296 { "verbose", no_argument, 0, 'v' }, 297 { "version", no_argument, 0, 'V' }, 298 { "fast", no_argument, 0, '1' }, 299 { "best", no_argument, 0, '9' }, 300 #if 0 301 /* 302 * This is what else GNU gzip implements. --ascii isn't useful 303 * on NetBSD, and I don't care to have a --license. 304 */ 305 { "ascii", no_argument, 0, 'a' }, 306 { "license", no_argument, 0, 'L' }, 307 #endif 308 { NULL, no_argument, 0, 0 }, 309 }; 310 #endif 311 312 int 313 main(int argc, char **argv) 314 { 315 const char *progname = getprogname(); 316 #ifndef SMALL 317 char *gzip; 318 int len; 319 #endif 320 int ch; 321 322 setup_signals(); 323 324 #ifndef SMALL 325 if ((gzip = getenv("GZIP")) != NULL) 326 prepend_gzip(gzip, &argc, &argv); 327 #endif 328 329 /* 330 * XXX 331 * handle being called `gunzip', `zcat' and `gzcat' 332 */ 333 if (strcmp(progname, "gunzip") == 0) 334 dflag = 1; 335 else if (strcmp(progname, "zcat") == 0 || 336 strcmp(progname, "gzcat") == 0) 337 dflag = cflag = 1; 338 339 #ifdef SMALL 340 #define OPT_LIST "123456789cdhlV" 341 #else 342 #define OPT_LIST "123456789cdfhklNnqrS:tVv" 343 #endif 344 345 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) { 346 switch (ch) { 347 case '1': case '2': case '3': 348 case '4': case '5': case '6': 349 case '7': case '8': case '9': 350 numflag = ch - '0'; 351 break; 352 case 'c': 353 cflag = 1; 354 break; 355 case 'd': 356 dflag = 1; 357 break; 358 case 'l': 359 lflag = 1; 360 dflag = 1; 361 break; 362 case 'V': 363 display_version(); 364 /* NOTREACHED */ 365 #ifndef SMALL 366 case 'f': 367 fflag = 1; 368 break; 369 case 'k': 370 kflag = 1; 371 break; 372 case 'N': 373 nflag = 0; 374 Nflag = 1; 375 break; 376 case 'n': 377 nflag = 1; 378 Nflag = 0; 379 break; 380 case 'q': 381 qflag = 1; 382 break; 383 case 'r': 384 rflag = 1; 385 break; 386 case 'S': 387 len = strlen(optarg); 388 if (len != 0) { 389 if (len > SUFFIX_MAXLEN) 390 errx(1, "incorrect suffix: '%s'", optarg); 391 suffixes[0].zipped = optarg; 392 suffixes[0].ziplen = len; 393 } else { 394 suffixes[NUM_SUFFIXES - 1].zipped = ""; 395 suffixes[NUM_SUFFIXES - 1].ziplen = 0; 396 } 397 break; 398 case 't': 399 cflag = 1; 400 tflag = 1; 401 dflag = 1; 402 break; 403 case 'v': 404 vflag = 1; 405 break; 406 #endif 407 default: 408 usage(); 409 /* NOTREACHED */ 410 } 411 } 412 argv += optind; 413 argc -= optind; 414 415 if (argc == 0) { 416 if (dflag) /* stdin mode */ 417 handle_stdin(); 418 else /* stdout mode */ 419 handle_stdout(); 420 } else { 421 do { 422 handle_pathname(argv[0]); 423 } while (*++argv); 424 } 425 #ifndef SMALL 426 if (qflag == 0 && lflag && argc > 1) 427 print_list(-1, 0, "(totals)", 0); 428 #endif 429 exit(exit_value); 430 } 431 432 /* maybe print a warning */ 433 void 434 maybe_warn(const char *fmt, ...) 435 { 436 va_list ap; 437 438 if (qflag == 0) { 439 va_start(ap, fmt); 440 vwarn(fmt, ap); 441 va_end(ap); 442 } 443 if (exit_value == 0) 444 exit_value = 1; 445 } 446 447 /* ... without an errno. */ 448 void 449 maybe_warnx(const char *fmt, ...) 450 { 451 va_list ap; 452 453 if (qflag == 0) { 454 va_start(ap, fmt); 455 vwarnx(fmt, ap); 456 va_end(ap); 457 } 458 if (exit_value == 0) 459 exit_value = 1; 460 } 461 462 /* maybe print an error */ 463 void 464 maybe_err(const char *fmt, ...) 465 { 466 va_list ap; 467 468 if (qflag == 0) { 469 va_start(ap, fmt); 470 vwarn(fmt, ap); 471 va_end(ap); 472 } 473 exit(2); 474 } 475 476 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \ 477 !defined(NO_XZ_SUPPORT) 478 /* ... without an errno. */ 479 void 480 maybe_errx(const char *fmt, ...) 481 { 482 va_list ap; 483 484 if (qflag == 0) { 485 va_start(ap, fmt); 486 vwarnx(fmt, ap); 487 va_end(ap); 488 } 489 exit(2); 490 } 491 #endif 492 493 #ifndef SMALL 494 /* split up $GZIP and prepend it to the argument list */ 495 static void 496 prepend_gzip(char *gzip, int *argc, char ***argv) 497 { 498 char *s, **nargv, **ac; 499 int nenvarg = 0, i; 500 501 /* scan how many arguments there are */ 502 for (s = gzip;;) { 503 while (*s == ' ' || *s == '\t') 504 s++; 505 if (*s == 0) 506 goto count_done; 507 nenvarg++; 508 while (*s != ' ' && *s != '\t') 509 if (*s++ == 0) 510 goto count_done; 511 } 512 count_done: 513 /* punt early */ 514 if (nenvarg == 0) 515 return; 516 517 *argc += nenvarg; 518 ac = *argv; 519 520 nargv = (char **)malloc((*argc + 1) * sizeof(char *)); 521 if (nargv == NULL) 522 maybe_err("malloc"); 523 524 /* stash this away */ 525 *argv = nargv; 526 527 /* copy the program name first */ 528 i = 0; 529 nargv[i++] = *(ac++); 530 531 /* take a copy of $GZIP and add it to the array */ 532 s = strdup(gzip); 533 if (s == NULL) 534 maybe_err("strdup"); 535 for (;;) { 536 /* Skip whitespaces. */ 537 while (*s == ' ' || *s == '\t') 538 s++; 539 if (*s == 0) 540 goto copy_done; 541 nargv[i++] = s; 542 /* Find the end of this argument. */ 543 while (*s != ' ' && *s != '\t') 544 if (*s++ == 0) 545 /* Argument followed by NUL. */ 546 goto copy_done; 547 /* Terminate by overwriting ' ' or '\t' with NUL. */ 548 *s++ = 0; 549 } 550 copy_done: 551 552 /* copy the original arguments and a NULL */ 553 while (*ac) 554 nargv[i++] = *(ac++); 555 nargv[i] = NULL; 556 } 557 #endif 558 559 /* compress input to output. Return bytes read, -1 on error */ 560 static off_t 561 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime) 562 { 563 z_stream z; 564 char *outbufp, *inbufp; 565 off_t in_tot = 0, out_tot = 0; 566 ssize_t in_size; 567 int i, error; 568 uLong crc; 569 #ifdef SMALL 570 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0, 571 0, 0, 0, 0, 572 0, OS_CODE }; 573 #endif 574 575 outbufp = malloc(BUFLEN); 576 inbufp = malloc(BUFLEN); 577 if (outbufp == NULL || inbufp == NULL) { 578 maybe_err("malloc failed"); 579 goto out; 580 } 581 582 memset(&z, 0, sizeof z); 583 z.zalloc = Z_NULL; 584 z.zfree = Z_NULL; 585 z.opaque = 0; 586 587 #ifdef SMALL 588 memcpy(outbufp, header, sizeof header); 589 i = sizeof header; 590 #else 591 if (nflag != 0) { 592 mtime = 0; 593 origname = ""; 594 } 595 596 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s", 597 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 598 *origname ? ORIG_NAME : 0, 599 mtime & 0xff, 600 (mtime >> 8) & 0xff, 601 (mtime >> 16) & 0xff, 602 (mtime >> 24) & 0xff, 603 numflag == 1 ? 4 : numflag == 9 ? 2 : 0, 604 OS_CODE, origname); 605 if (i >= BUFLEN) 606 /* this need PATH_MAX > BUFLEN ... */ 607 maybe_err("snprintf"); 608 if (*origname) 609 i++; 610 #endif 611 612 z.next_out = (unsigned char *)outbufp + i; 613 z.avail_out = BUFLEN - i; 614 615 error = deflateInit2(&z, numflag, Z_DEFLATED, 616 (-MAX_WBITS), 8, Z_DEFAULT_STRATEGY); 617 if (error != Z_OK) { 618 maybe_warnx("deflateInit2 failed"); 619 in_tot = -1; 620 goto out; 621 } 622 623 crc = crc32(0L, Z_NULL, 0); 624 for (;;) { 625 if (z.avail_out == 0) { 626 if (write_retry(out, outbufp, BUFLEN) != BUFLEN) { 627 maybe_warn("write"); 628 out_tot = -1; 629 goto out; 630 } 631 632 out_tot += BUFLEN; 633 z.next_out = (unsigned char *)outbufp; 634 z.avail_out = BUFLEN; 635 } 636 637 if (z.avail_in == 0) { 638 in_size = read(in, inbufp, BUFLEN); 639 if (in_size < 0) { 640 maybe_warn("read"); 641 in_tot = -1; 642 goto out; 643 } 644 if (in_size == 0) 645 break; 646 infile_newdata(in_size); 647 648 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size); 649 in_tot += in_size; 650 z.next_in = (unsigned char *)inbufp; 651 z.avail_in = in_size; 652 } 653 654 error = deflate(&z, Z_NO_FLUSH); 655 if (error != Z_OK && error != Z_STREAM_END) { 656 maybe_warnx("deflate failed"); 657 in_tot = -1; 658 goto out; 659 } 660 } 661 662 /* clean up */ 663 for (;;) { 664 size_t len; 665 ssize_t w; 666 667 error = deflate(&z, Z_FINISH); 668 if (error != Z_OK && error != Z_STREAM_END) { 669 maybe_warnx("deflate failed"); 670 in_tot = -1; 671 goto out; 672 } 673 674 len = (char *)z.next_out - outbufp; 675 676 w = write_retry(out, outbufp, len); 677 if (w == -1 || (size_t)w != len) { 678 maybe_warn("write"); 679 out_tot = -1; 680 goto out; 681 } 682 out_tot += len; 683 z.next_out = (unsigned char *)outbufp; 684 z.avail_out = BUFLEN; 685 686 if (error == Z_STREAM_END) 687 break; 688 } 689 690 if (deflateEnd(&z) != Z_OK) { 691 maybe_warnx("deflateEnd failed"); 692 in_tot = -1; 693 goto out; 694 } 695 696 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c", 697 (int)crc & 0xff, 698 (int)(crc >> 8) & 0xff, 699 (int)(crc >> 16) & 0xff, 700 (int)(crc >> 24) & 0xff, 701 (int)in_tot & 0xff, 702 (int)(in_tot >> 8) & 0xff, 703 (int)(in_tot >> 16) & 0xff, 704 (int)(in_tot >> 24) & 0xff); 705 if (i != 8) 706 maybe_err("snprintf"); 707 #if 0 708 if (in_tot > 0xffffffff) 709 maybe_warn("input file size >= 4GB cannot be saved"); 710 #endif 711 if (write_retry(out, outbufp, i) != i) { 712 maybe_warn("write"); 713 in_tot = -1; 714 } else 715 out_tot += i; 716 717 out: 718 if (inbufp != NULL) 719 free(inbufp); 720 if (outbufp != NULL) 721 free(outbufp); 722 if (gsizep) 723 *gsizep = out_tot; 724 return in_tot; 725 } 726 727 /* 728 * uncompress input to output then close the input. return the 729 * uncompressed size written, and put the compressed sized read 730 * into `*gsizep'. 731 */ 732 static off_t 733 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep, 734 const char *filename) 735 { 736 z_stream z; 737 char *outbufp, *inbufp; 738 off_t out_tot = -1, in_tot = 0; 739 uint32_t out_sub_tot = 0; 740 enum { 741 GZSTATE_MAGIC0, 742 GZSTATE_MAGIC1, 743 GZSTATE_METHOD, 744 GZSTATE_FLAGS, 745 GZSTATE_SKIPPING, 746 GZSTATE_EXTRA, 747 GZSTATE_EXTRA2, 748 GZSTATE_EXTRA3, 749 GZSTATE_ORIGNAME, 750 GZSTATE_COMMENT, 751 GZSTATE_HEAD_CRC1, 752 GZSTATE_HEAD_CRC2, 753 GZSTATE_INIT, 754 GZSTATE_READ, 755 GZSTATE_CRC, 756 GZSTATE_LEN, 757 } state = GZSTATE_MAGIC0; 758 int flags = 0, skip_count = 0; 759 int error = Z_STREAM_ERROR, done_reading = 0; 760 uLong crc = 0; 761 ssize_t wr; 762 int needmore = 0; 763 764 #define ADVANCE() { z.next_in++; z.avail_in--; } 765 766 if ((outbufp = malloc(BUFLEN)) == NULL) { 767 maybe_err("malloc failed"); 768 goto out2; 769 } 770 if ((inbufp = malloc(BUFLEN)) == NULL) { 771 maybe_err("malloc failed"); 772 goto out1; 773 } 774 775 memset(&z, 0, sizeof z); 776 z.avail_in = prelen; 777 z.next_in = (unsigned char *)pre; 778 z.avail_out = BUFLEN; 779 z.next_out = (unsigned char *)outbufp; 780 z.zalloc = NULL; 781 z.zfree = NULL; 782 z.opaque = 0; 783 784 in_tot = prelen; 785 out_tot = 0; 786 787 for (;;) { 788 check_siginfo(); 789 if ((z.avail_in == 0 || needmore) && done_reading == 0) { 790 ssize_t in_size; 791 792 if (z.avail_in > 0) { 793 memmove(inbufp, z.next_in, z.avail_in); 794 } 795 z.next_in = (unsigned char *)inbufp; 796 in_size = read(in, z.next_in + z.avail_in, 797 BUFLEN - z.avail_in); 798 799 if (in_size == -1) { 800 maybe_warn("failed to read stdin"); 801 goto stop_and_fail; 802 } else if (in_size == 0) { 803 done_reading = 1; 804 } 805 infile_newdata(in_size); 806 807 z.avail_in += in_size; 808 needmore = 0; 809 810 in_tot += in_size; 811 } 812 if (z.avail_in == 0) { 813 if (done_reading && state != GZSTATE_MAGIC0) { 814 maybe_warnx("%s: unexpected end of file", 815 filename); 816 goto stop_and_fail; 817 } 818 goto stop; 819 } 820 switch (state) { 821 case GZSTATE_MAGIC0: 822 if (*z.next_in != GZIP_MAGIC0) { 823 if (in_tot > 0) { 824 maybe_warnx("%s: trailing garbage " 825 "ignored", filename); 826 goto stop; 827 } 828 maybe_warnx("input not gziped (MAGIC0)"); 829 exit_value = 2; 830 goto stop_and_fail; 831 } 832 ADVANCE(); 833 state++; 834 out_sub_tot = 0; 835 crc = crc32(0L, Z_NULL, 0); 836 break; 837 838 case GZSTATE_MAGIC1: 839 if (*z.next_in != GZIP_MAGIC1 && 840 *z.next_in != GZIP_OMAGIC1) { 841 maybe_warnx("input not gziped (MAGIC1)"); 842 goto stop_and_fail; 843 } 844 ADVANCE(); 845 state++; 846 break; 847 848 case GZSTATE_METHOD: 849 if (*z.next_in != Z_DEFLATED) { 850 maybe_warnx("unknown compression method"); 851 goto stop_and_fail; 852 } 853 ADVANCE(); 854 state++; 855 break; 856 857 case GZSTATE_FLAGS: 858 flags = *z.next_in; 859 ADVANCE(); 860 skip_count = 6; 861 state++; 862 break; 863 864 case GZSTATE_SKIPPING: 865 if (skip_count > 0) { 866 skip_count--; 867 ADVANCE(); 868 } else 869 state++; 870 break; 871 872 case GZSTATE_EXTRA: 873 if ((flags & EXTRA_FIELD) == 0) { 874 state = GZSTATE_ORIGNAME; 875 break; 876 } 877 skip_count = *z.next_in; 878 ADVANCE(); 879 state++; 880 break; 881 882 case GZSTATE_EXTRA2: 883 skip_count |= ((*z.next_in) << 8); 884 ADVANCE(); 885 state++; 886 break; 887 888 case GZSTATE_EXTRA3: 889 if (skip_count > 0) { 890 skip_count--; 891 ADVANCE(); 892 } else 893 state++; 894 break; 895 896 case GZSTATE_ORIGNAME: 897 if ((flags & ORIG_NAME) == 0) { 898 state++; 899 break; 900 } 901 if (*z.next_in == 0) 902 state++; 903 ADVANCE(); 904 break; 905 906 case GZSTATE_COMMENT: 907 if ((flags & COMMENT) == 0) { 908 state++; 909 break; 910 } 911 if (*z.next_in == 0) 912 state++; 913 ADVANCE(); 914 break; 915 916 case GZSTATE_HEAD_CRC1: 917 if (flags & HEAD_CRC) 918 skip_count = 2; 919 else 920 skip_count = 0; 921 state++; 922 break; 923 924 case GZSTATE_HEAD_CRC2: 925 if (skip_count > 0) { 926 skip_count--; 927 ADVANCE(); 928 } else 929 state++; 930 break; 931 932 case GZSTATE_INIT: 933 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) { 934 maybe_warnx("failed to inflateInit"); 935 goto stop_and_fail; 936 } 937 state++; 938 break; 939 940 case GZSTATE_READ: 941 error = inflate(&z, Z_FINISH); 942 switch (error) { 943 /* Z_BUF_ERROR goes with Z_FINISH... */ 944 case Z_BUF_ERROR: 945 if (z.avail_out > 0 && !done_reading) 946 continue; 947 948 case Z_STREAM_END: 949 case Z_OK: 950 break; 951 952 case Z_NEED_DICT: 953 maybe_warnx("Z_NEED_DICT error"); 954 goto stop_and_fail; 955 case Z_DATA_ERROR: 956 maybe_warnx("data stream error"); 957 goto stop_and_fail; 958 case Z_STREAM_ERROR: 959 maybe_warnx("internal stream error"); 960 goto stop_and_fail; 961 case Z_MEM_ERROR: 962 maybe_warnx("memory allocation error"); 963 goto stop_and_fail; 964 965 default: 966 maybe_warn("unknown error from inflate(): %d", 967 error); 968 } 969 wr = BUFLEN - z.avail_out; 970 971 if (wr != 0) { 972 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 973 if ( 974 #ifndef SMALL 975 /* don't write anything with -t */ 976 tflag == 0 && 977 #endif 978 write_retry(out, outbufp, wr) != wr) { 979 maybe_warn("error writing to output"); 980 goto stop_and_fail; 981 } 982 983 out_tot += wr; 984 out_sub_tot += wr; 985 } 986 987 if (error == Z_STREAM_END) { 988 inflateEnd(&z); 989 state++; 990 } 991 992 z.next_out = (unsigned char *)outbufp; 993 z.avail_out = BUFLEN; 994 995 break; 996 case GZSTATE_CRC: 997 { 998 uLong origcrc; 999 1000 if (z.avail_in < 4) { 1001 if (!done_reading) { 1002 needmore = 1; 1003 continue; 1004 } 1005 maybe_warnx("truncated input"); 1006 goto stop_and_fail; 1007 } 1008 origcrc = ((unsigned)z.next_in[0] & 0xff) | 1009 ((unsigned)z.next_in[1] & 0xff) << 8 | 1010 ((unsigned)z.next_in[2] & 0xff) << 16 | 1011 ((unsigned)z.next_in[3] & 0xff) << 24; 1012 if (origcrc != crc) { 1013 maybe_warnx("invalid compressed" 1014 " data--crc error"); 1015 goto stop_and_fail; 1016 } 1017 } 1018 1019 z.avail_in -= 4; 1020 z.next_in += 4; 1021 1022 if (!z.avail_in && done_reading) { 1023 goto stop; 1024 } 1025 state++; 1026 break; 1027 case GZSTATE_LEN: 1028 { 1029 uLong origlen; 1030 1031 if (z.avail_in < 4) { 1032 if (!done_reading) { 1033 needmore = 1; 1034 continue; 1035 } 1036 maybe_warnx("truncated input"); 1037 goto stop_and_fail; 1038 } 1039 origlen = ((unsigned)z.next_in[0] & 0xff) | 1040 ((unsigned)z.next_in[1] & 0xff) << 8 | 1041 ((unsigned)z.next_in[2] & 0xff) << 16 | 1042 ((unsigned)z.next_in[3] & 0xff) << 24; 1043 1044 if (origlen != out_sub_tot) { 1045 maybe_warnx("invalid compressed" 1046 " data--length error"); 1047 goto stop_and_fail; 1048 } 1049 } 1050 1051 z.avail_in -= 4; 1052 z.next_in += 4; 1053 1054 if (error < 0) { 1055 maybe_warnx("decompression error"); 1056 goto stop_and_fail; 1057 } 1058 state = GZSTATE_MAGIC0; 1059 break; 1060 } 1061 continue; 1062 stop_and_fail: 1063 out_tot = -1; 1064 stop: 1065 break; 1066 } 1067 if (state > GZSTATE_INIT) 1068 inflateEnd(&z); 1069 1070 free(inbufp); 1071 out1: 1072 free(outbufp); 1073 out2: 1074 if (gsizep) 1075 *gsizep = in_tot; 1076 return (out_tot); 1077 } 1078 1079 #ifndef SMALL 1080 /* 1081 * set the owner, mode, flags & utimes using the given file descriptor. 1082 * file is only used in possible warning messages. 1083 */ 1084 static void 1085 copymodes(int fd, const struct stat *sbp, const char *file) 1086 { 1087 struct timeval times[2]; 1088 struct stat sb; 1089 1090 /* 1091 * If we have no info on the input, give this file some 1092 * default values and return.. 1093 */ 1094 if (sbp == NULL) { 1095 mode_t mask = umask(022); 1096 1097 (void)fchmod(fd, DEFFILEMODE & ~mask); 1098 (void)umask(mask); 1099 return; 1100 } 1101 sb = *sbp; 1102 1103 /* if the chown fails, remove set-id bits as-per compress(1) */ 1104 if (fchown(fd, sb.st_uid, sb.st_gid) < 0) { 1105 if (errno != EPERM) 1106 maybe_warn("couldn't fchown: %s", file); 1107 sb.st_mode &= ~(S_ISUID|S_ISGID); 1108 } 1109 1110 /* we only allow set-id and the 9 normal permission bits */ 1111 sb.st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1112 if (fchmod(fd, sb.st_mode) < 0) 1113 maybe_warn("couldn't fchmod: %s", file); 1114 1115 /* only try flags if they exist already */ 1116 if (sb.st_flags != 0 && fchflags(fd, sb.st_flags) < 0) 1117 maybe_warn("couldn't fchflags: %s", file); 1118 1119 TIMESPEC_TO_TIMEVAL(×[0], &sb.st_atimespec); 1120 TIMESPEC_TO_TIMEVAL(×[1], &sb.st_mtimespec); 1121 if (futimes(fd, times) < 0) 1122 maybe_warn("couldn't utimes: %s", file); 1123 } 1124 #endif 1125 1126 /* what sort of file is this? */ 1127 static enum filetype 1128 file_gettype(u_char *buf) 1129 { 1130 1131 if (buf[0] == GZIP_MAGIC0 && 1132 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1133 return FT_GZIP; 1134 else 1135 #ifndef NO_BZIP2_SUPPORT 1136 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1137 buf[3] >= '0' && buf[3] <= '9') 1138 return FT_BZIP2; 1139 else 1140 #endif 1141 #ifndef NO_COMPRESS_SUPPORT 1142 if (memcmp(buf, Z_MAGIC, 2) == 0) 1143 return FT_Z; 1144 else 1145 #endif 1146 #ifndef NO_PACK_SUPPORT 1147 if (memcmp(buf, PACK_MAGIC, 2) == 0) 1148 return FT_PACK; 1149 else 1150 #endif 1151 #ifndef NO_XZ_SUPPORT 1152 if (memcmp(buf, XZ_MAGIC, 4) == 0) /* XXX: We only have 4 bytes */ 1153 return FT_XZ; 1154 else 1155 #endif 1156 #ifndef NO_LZ_SUPPORT 1157 if (memcmp(buf, LZ_MAGIC, 4) == 0) 1158 return FT_LZ; 1159 else 1160 #endif 1161 return FT_UNKNOWN; 1162 } 1163 1164 #ifndef SMALL 1165 /* check the outfile is OK. */ 1166 static int 1167 check_outfile(const char *outfile) 1168 { 1169 struct stat sb; 1170 int ok = 1; 1171 1172 if (lflag == 0 && stat(outfile, &sb) == 0) { 1173 if (fflag) 1174 unlink(outfile); 1175 else if (isatty(STDIN_FILENO)) { 1176 char ans[10] = { 'n', '\0' }; /* default */ 1177 1178 fprintf(stderr, "%s already exists -- do you wish to " 1179 "overwrite (y or n)? " , outfile); 1180 (void)fgets(ans, sizeof(ans) - 1, stdin); 1181 if (ans[0] != 'y' && ans[0] != 'Y') { 1182 fprintf(stderr, "\tnot overwriting\n"); 1183 ok = 0; 1184 } else 1185 unlink(outfile); 1186 } else { 1187 maybe_warnx("%s already exists -- skipping", outfile); 1188 ok = 0; 1189 } 1190 } 1191 return ok; 1192 } 1193 1194 static void 1195 unlink_input(const char *file, const struct stat *sb) 1196 { 1197 struct stat nsb; 1198 1199 if (kflag) 1200 return; 1201 if (stat(file, &nsb) != 0) 1202 /* Must be gone already */ 1203 return; 1204 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1205 /* Definitely a different file */ 1206 return; 1207 unlink(file); 1208 } 1209 1210 static void 1211 got_siginfo(int signo) 1212 { 1213 1214 print_info = 1; 1215 } 1216 1217 static void 1218 setup_signals(void) 1219 { 1220 1221 signal(SIGINFO, got_siginfo); 1222 } 1223 1224 static void 1225 infile_newdata(size_t newdata) 1226 { 1227 1228 infile_current += newdata; 1229 } 1230 #endif 1231 1232 static void 1233 infile_set(const char *newinfile, off_t total) 1234 { 1235 1236 if (newinfile) 1237 infile = newinfile; 1238 #ifndef SMALL 1239 infile_total = total; 1240 #endif 1241 } 1242 1243 static void 1244 infile_clear(void) 1245 { 1246 1247 infile = NULL; 1248 #ifndef SMALL 1249 infile_total = infile_current = 0; 1250 #endif 1251 } 1252 1253 static const suffixes_t * 1254 check_suffix(char *file, int xlate) 1255 { 1256 const suffixes_t *s; 1257 int len = strlen(file); 1258 char *sp; 1259 1260 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1261 /* if it doesn't fit in "a.suf", don't bother */ 1262 if (s->ziplen >= len) 1263 continue; 1264 sp = file + len - s->ziplen; 1265 if (strcmp(s->zipped, sp) != 0) 1266 continue; 1267 if (xlate) 1268 strcpy(sp, s->normal); 1269 return s; 1270 } 1271 return NULL; 1272 } 1273 1274 /* 1275 * compress the given file: create a corresponding .gz file and remove the 1276 * original. 1277 */ 1278 static off_t 1279 file_compress(char *file, char *outfile, size_t outsize) 1280 { 1281 int in; 1282 int out; 1283 off_t size, in_size; 1284 #ifndef SMALL 1285 struct stat isb, osb; 1286 const suffixes_t *suff; 1287 #endif 1288 1289 in = open(file, O_RDONLY); 1290 if (in == -1) { 1291 maybe_warn("can't open %s", file); 1292 return -1; 1293 } 1294 1295 #ifndef SMALL 1296 if (fstat(in, &isb) != 0) { 1297 close(in); 1298 maybe_warn("can't stat %s", file); 1299 return -1; 1300 } 1301 infile_set(file, isb.st_size); 1302 #endif 1303 1304 if (cflag == 0) { 1305 #ifndef SMALL 1306 if (isb.st_nlink > 1 && fflag == 0) { 1307 maybe_warnx("%s has %d other link%s -- " 1308 "skipping", file, isb.st_nlink - 1, 1309 isb.st_nlink == 1 ? "" : "s"); 1310 close(in); 1311 return -1; 1312 } 1313 1314 if (fflag == 0 && (suff = check_suffix(file, 0)) 1315 && suff->zipped[0] != 0) { 1316 maybe_warnx("%s already has %s suffix -- unchanged", 1317 file, suff->zipped); 1318 close(in); 1319 return -1; 1320 } 1321 #endif 1322 1323 /* Add (usually) .gz to filename */ 1324 if ((size_t)snprintf(outfile, outsize, "%s%s", 1325 file, suffixes[0].zipped) >= outsize) 1326 memcpy(outfile + outsize - suffixes[0].ziplen - 1, 1327 suffixes[0].zipped, suffixes[0].ziplen + 1); 1328 1329 #ifndef SMALL 1330 if (check_outfile(outfile) == 0) { 1331 close(in); 1332 return -1; 1333 } 1334 #endif 1335 } 1336 1337 if (cflag == 0) { 1338 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600); 1339 if (out == -1) { 1340 maybe_warn("could not create output: %s", outfile); 1341 fclose(stdin); 1342 return -1; 1343 } 1344 } else 1345 out = STDOUT_FILENO; 1346 1347 in_size = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1348 1349 (void)close(in); 1350 1351 /* 1352 * If there was an error, in_size will be -1. 1353 * If we compressed to stdout, just return the size. 1354 * Otherwise stat the file and check it is the correct size. 1355 * We only blow away the file if we can stat the output and it 1356 * has the expected size. 1357 */ 1358 if (cflag != 0) 1359 return in_size == -1 ? -1 : size; 1360 1361 #ifndef SMALL 1362 if (fstat(out, &osb) != 0) { 1363 maybe_warn("couldn't stat: %s", outfile); 1364 goto bad_outfile; 1365 } 1366 1367 if (osb.st_size != size) { 1368 maybe_warnx("output file: %s wrong size (%" PRIdOFF 1369 " != %" PRIdOFF "), deleting", 1370 outfile, osb.st_size, size); 1371 goto bad_outfile; 1372 } 1373 1374 copymodes(out, &isb, outfile); 1375 #endif 1376 if (close(out) == -1) 1377 maybe_warn("couldn't close output"); 1378 1379 /* output is good, ok to delete input */ 1380 unlink_input(file, &isb); 1381 return size; 1382 1383 #ifndef SMALL 1384 bad_outfile: 1385 if (close(out) == -1) 1386 maybe_warn("couldn't close output"); 1387 1388 maybe_warnx("leaving original %s", file); 1389 unlink(outfile); 1390 return size; 1391 #endif 1392 } 1393 1394 /* uncompress the given file and remove the original */ 1395 static off_t 1396 file_uncompress(char *file, char *outfile, size_t outsize) 1397 { 1398 struct stat isb, osb; 1399 off_t size; 1400 ssize_t rbytes; 1401 unsigned char header1[4]; 1402 enum filetype method; 1403 int fd, ofd, zfd = -1; 1404 size_t in_size; 1405 #ifndef SMALL 1406 ssize_t rv; 1407 time_t timestamp = 0; 1408 char name[PATH_MAX + 1]; 1409 #endif 1410 1411 /* gather the old name info */ 1412 1413 fd = open(file, O_RDONLY); 1414 if (fd < 0) { 1415 maybe_warn("can't open %s", file); 1416 goto lose; 1417 } 1418 if (fstat(fd, &isb) != 0) { 1419 close(fd); 1420 maybe_warn("can't stat %s", file); 1421 goto lose; 1422 } 1423 if (S_ISREG(isb.st_mode)) 1424 in_size = isb.st_size; 1425 else 1426 in_size = 0; 1427 infile_set(file, in_size); 1428 1429 strlcpy(outfile, file, outsize); 1430 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1431 maybe_warnx("%s: unknown suffix -- ignored", file); 1432 goto lose; 1433 } 1434 1435 rbytes = read(fd, header1, sizeof header1); 1436 if (rbytes != sizeof header1) { 1437 /* we don't want to fail here. */ 1438 #ifndef SMALL 1439 if (fflag) 1440 goto lose; 1441 #endif 1442 if (rbytes == -1) 1443 maybe_warn("can't read %s", file); 1444 else 1445 goto unexpected_EOF; 1446 goto lose; 1447 } 1448 infile_newdata(rbytes); 1449 1450 method = file_gettype(header1); 1451 #ifndef SMALL 1452 if (fflag == 0 && method == FT_UNKNOWN) { 1453 maybe_warnx("%s: not in gzip format", file); 1454 goto lose; 1455 } 1456 1457 #endif 1458 1459 #ifndef SMALL 1460 if (method == FT_GZIP && Nflag) { 1461 unsigned char ts[4]; /* timestamp */ 1462 1463 rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP); 1464 if (rv >= 0 && rv < (ssize_t)(sizeof ts)) 1465 goto unexpected_EOF; 1466 if (rv == -1) { 1467 if (!fflag) 1468 maybe_warn("can't read %s", file); 1469 goto lose; 1470 } 1471 infile_newdata(rv); 1472 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0]; 1473 1474 if (header1[3] & ORIG_NAME) { 1475 rbytes = pread(fd, name, sizeof(name) - 1, GZIP_ORIGNAME); 1476 if (rbytes < 0) { 1477 maybe_warn("can't read %s", file); 1478 goto lose; 1479 } 1480 if (name[0] != '\0') { 1481 char *dp, *nf; 1482 1483 /* Make sure that name is NUL-terminated */ 1484 name[rbytes] = '\0'; 1485 1486 /* strip saved directory name */ 1487 nf = strrchr(name, '/'); 1488 if (nf == NULL) 1489 nf = name; 1490 else 1491 nf++; 1492 1493 /* preserve original directory name */ 1494 dp = strrchr(file, '/'); 1495 if (dp == NULL) 1496 dp = file; 1497 else 1498 dp++; 1499 snprintf(outfile, outsize, "%.*s%.*s", 1500 (int) (dp - file), 1501 file, (int) rbytes, nf); 1502 } 1503 } 1504 } 1505 #endif 1506 lseek(fd, 0, SEEK_SET); 1507 1508 if (cflag == 0 || lflag) { 1509 #ifndef SMALL 1510 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1511 maybe_warnx("%s has %d other links -- skipping", 1512 file, isb.st_nlink - 1); 1513 goto lose; 1514 } 1515 if (nflag == 0 && timestamp) 1516 isb.st_mtime = timestamp; 1517 if (check_outfile(outfile) == 0) 1518 goto lose; 1519 #endif 1520 } 1521 1522 if (cflag) 1523 zfd = STDOUT_FILENO; 1524 else if (lflag) 1525 zfd = -1; 1526 else { 1527 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1528 if (zfd == STDOUT_FILENO) { 1529 /* We won't close STDOUT_FILENO later... */ 1530 zfd = dup(zfd); 1531 close(STDOUT_FILENO); 1532 } 1533 if (zfd == -1) { 1534 maybe_warn("can't open %s", outfile); 1535 goto lose; 1536 } 1537 } 1538 1539 switch (method) { 1540 #ifndef NO_BZIP2_SUPPORT 1541 case FT_BZIP2: 1542 /* XXX */ 1543 if (lflag) { 1544 maybe_warnx("no -l with bzip2 files"); 1545 goto lose; 1546 } 1547 1548 size = unbzip2(fd, zfd, NULL, 0, NULL); 1549 break; 1550 #endif 1551 1552 #ifndef NO_COMPRESS_SUPPORT 1553 case FT_Z: { 1554 FILE *in, *out; 1555 1556 /* XXX */ 1557 if (lflag) { 1558 maybe_warnx("no -l with Lempel-Ziv files"); 1559 goto lose; 1560 } 1561 1562 if ((in = zdopen(fd)) == NULL) { 1563 maybe_warn("zdopen for read: %s", file); 1564 goto lose; 1565 } 1566 1567 out = fdopen(dup(zfd), "w"); 1568 if (out == NULL) { 1569 maybe_warn("fdopen for write: %s", outfile); 1570 fclose(in); 1571 goto lose; 1572 } 1573 1574 size = zuncompress(in, out, NULL, 0, NULL); 1575 /* need to fclose() if ferror() is true... */ 1576 if (ferror(in) | fclose(in)) { 1577 maybe_warn("failed infile fclose"); 1578 unlink(outfile); 1579 (void)fclose(out); 1580 } 1581 if (fclose(out) != 0) { 1582 maybe_warn("failed outfile fclose"); 1583 unlink(outfile); 1584 goto lose; 1585 } 1586 break; 1587 } 1588 #endif 1589 1590 #ifndef NO_PACK_SUPPORT 1591 case FT_PACK: 1592 if (lflag) { 1593 maybe_warnx("no -l with packed files"); 1594 goto lose; 1595 } 1596 1597 size = unpack(fd, zfd, NULL, 0, NULL); 1598 break; 1599 #endif 1600 1601 #ifndef NO_XZ_SUPPORT 1602 case FT_XZ: 1603 if (lflag) { 1604 size = unxz_len(fd); 1605 print_list_out(in_size, size, file); 1606 return -1; 1607 } 1608 size = unxz(fd, zfd, NULL, 0, NULL); 1609 break; 1610 #endif 1611 1612 #ifndef NO_LZ_SUPPORT 1613 case FT_LZ: 1614 if (lflag) { 1615 maybe_warnx("no -l with lzip files"); 1616 goto lose; 1617 } 1618 size = unlz(fd, zfd, NULL, 0, NULL); 1619 break; 1620 #endif 1621 #ifndef SMALL 1622 case FT_UNKNOWN: 1623 if (lflag) { 1624 maybe_warnx("no -l for unknown filetypes"); 1625 goto lose; 1626 } 1627 size = cat_fd(NULL, 0, NULL, fd); 1628 break; 1629 #endif 1630 default: 1631 if (lflag) { 1632 print_list(fd, in_size, outfile, isb.st_mtime); 1633 close(fd); 1634 return -1; /* XXX */ 1635 } 1636 1637 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1638 break; 1639 } 1640 1641 if (close(fd) != 0) 1642 maybe_warn("couldn't close input"); 1643 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1644 maybe_warn("couldn't close output"); 1645 1646 if (size == -1) { 1647 if (cflag == 0) 1648 unlink(outfile); 1649 maybe_warnx("%s: uncompress failed", file); 1650 return -1; 1651 } 1652 1653 /* if testing, or we uncompressed to stdout, this is all we need */ 1654 #ifndef SMALL 1655 if (tflag) 1656 return size; 1657 #endif 1658 /* if we are uncompressing to stdin, don't remove the file. */ 1659 if (cflag) 1660 return size; 1661 1662 /* 1663 * if we create a file... 1664 */ 1665 /* 1666 * if we can't stat the file don't remove the file. 1667 */ 1668 1669 ofd = open(outfile, O_RDWR, 0); 1670 if (ofd == -1) { 1671 maybe_warn("couldn't open (leaving original): %s", 1672 outfile); 1673 return -1; 1674 } 1675 if (fstat(ofd, &osb) != 0) { 1676 maybe_warn("couldn't stat (leaving original): %s", 1677 outfile); 1678 close(ofd); 1679 return -1; 1680 } 1681 if (osb.st_size != size) { 1682 maybe_warnx("stat gave different size: %" PRIdOFF 1683 " != %" PRIdOFF " (leaving original)", 1684 size, osb.st_size); 1685 close(ofd); 1686 unlink(outfile); 1687 return -1; 1688 } 1689 unlink_input(file, &isb); 1690 #ifndef SMALL 1691 copymodes(ofd, &isb, outfile); 1692 #endif 1693 close(ofd); 1694 return size; 1695 1696 unexpected_EOF: 1697 maybe_warnx("%s: unexpected end of file", file); 1698 lose: 1699 if (fd != -1) 1700 close(fd); 1701 if (zfd != -1 && zfd != STDOUT_FILENO) 1702 close(fd); 1703 return -1; 1704 } 1705 1706 #ifndef SMALL 1707 static void 1708 check_siginfo(void) 1709 { 1710 if (print_info == 0) 1711 return; 1712 if (infile) { 1713 if (infile_total) { 1714 int pcent = (int)((100.0 * infile_current) / infile_total); 1715 1716 fprintf(stderr, "%s: done %llu/%llu bytes %d%%\n", 1717 infile, (unsigned long long)infile_current, 1718 (unsigned long long)infile_total, pcent); 1719 } else 1720 fprintf(stderr, "%s: done %llu bytes\n", 1721 infile, (unsigned long long)infile_current); 1722 } 1723 print_info = 0; 1724 } 1725 1726 static off_t 1727 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd) 1728 { 1729 char buf[BUFLEN]; 1730 off_t in_tot; 1731 ssize_t w; 1732 1733 in_tot = count; 1734 w = write_retry(STDOUT_FILENO, prepend, count); 1735 if (w == -1 || (size_t)w != count) { 1736 maybe_warn("write to stdout"); 1737 return -1; 1738 } 1739 for (;;) { 1740 ssize_t rv; 1741 1742 rv = read(fd, buf, sizeof buf); 1743 if (rv == 0) 1744 break; 1745 if (rv < 0) { 1746 maybe_warn("read from fd %d", fd); 1747 break; 1748 } 1749 infile_newdata(rv); 1750 1751 if (write_retry(STDOUT_FILENO, buf, rv) != rv) { 1752 maybe_warn("write to stdout"); 1753 break; 1754 } 1755 in_tot += rv; 1756 } 1757 1758 if (gsizep) 1759 *gsizep = in_tot; 1760 return (in_tot); 1761 } 1762 #endif 1763 1764 static void 1765 handle_stdin(void) 1766 { 1767 struct stat isb; 1768 unsigned char header1[4]; 1769 size_t in_size; 1770 off_t usize, gsize; 1771 enum filetype method; 1772 ssize_t bytes_read; 1773 #ifndef NO_COMPRESS_SUPPORT 1774 FILE *in; 1775 #endif 1776 1777 #ifndef SMALL 1778 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1779 maybe_warnx("standard input is a terminal -- ignoring"); 1780 goto out; 1781 } 1782 #endif 1783 1784 if (fstat(STDIN_FILENO, &isb) < 0) { 1785 maybe_warn("fstat"); 1786 goto out; 1787 } 1788 if (S_ISREG(isb.st_mode)) 1789 in_size = isb.st_size; 1790 else 1791 in_size = 0; 1792 infile_set("(stdin)", in_size); 1793 1794 if (lflag) { 1795 print_list(STDIN_FILENO, in_size, infile, isb.st_mtime); 1796 goto out; 1797 } 1798 1799 bytes_read = read_retry(STDIN_FILENO, header1, sizeof header1); 1800 if (bytes_read == -1) { 1801 maybe_warn("can't read stdin"); 1802 goto out; 1803 } else if (bytes_read != sizeof(header1)) { 1804 maybe_warnx("(stdin): unexpected end of file"); 1805 goto out; 1806 } 1807 1808 method = file_gettype(header1); 1809 switch (method) { 1810 default: 1811 #ifndef SMALL 1812 if (fflag == 0) { 1813 maybe_warnx("unknown compression format"); 1814 goto out; 1815 } 1816 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO); 1817 break; 1818 #endif 1819 case FT_GZIP: 1820 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1821 (char *)header1, sizeof header1, &gsize, "(stdin)"); 1822 break; 1823 #ifndef NO_BZIP2_SUPPORT 1824 case FT_BZIP2: 1825 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1826 (char *)header1, sizeof header1, &gsize); 1827 break; 1828 #endif 1829 #ifndef NO_COMPRESS_SUPPORT 1830 case FT_Z: 1831 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1832 maybe_warnx("zopen of stdin"); 1833 goto out; 1834 } 1835 1836 usize = zuncompress(in, stdout, (char *)header1, 1837 sizeof header1, &gsize); 1838 fclose(in); 1839 break; 1840 #endif 1841 #ifndef NO_PACK_SUPPORT 1842 case FT_PACK: 1843 usize = unpack(STDIN_FILENO, STDOUT_FILENO, 1844 (char *)header1, sizeof header1, &gsize); 1845 break; 1846 #endif 1847 #ifndef NO_XZ_SUPPORT 1848 case FT_XZ: 1849 usize = unxz(STDIN_FILENO, STDOUT_FILENO, 1850 (char *)header1, sizeof header1, &gsize); 1851 break; 1852 #endif 1853 #ifndef NO_LZ_SUPPORT 1854 case FT_LZ: 1855 usize = unlz(STDIN_FILENO, STDOUT_FILENO, 1856 (char *)header1, sizeof header1, &gsize); 1857 break; 1858 #endif 1859 } 1860 1861 #ifndef SMALL 1862 if (vflag && !tflag && usize != -1 && gsize != -1) 1863 print_verbage(NULL, NULL, usize, gsize); 1864 if (vflag && tflag) 1865 print_test("(stdin)", usize != -1); 1866 #else 1867 (void)&usize; 1868 #endif 1869 1870 out: 1871 infile_clear(); 1872 } 1873 1874 static void 1875 handle_stdout(void) 1876 { 1877 off_t gsize; 1878 #ifndef SMALL 1879 off_t usize; 1880 struct stat sb; 1881 time_t systime; 1882 uint32_t mtime; 1883 int ret; 1884 1885 infile_set("(stdout)", 0); 1886 1887 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1888 maybe_warnx("standard output is a terminal -- ignoring"); 1889 return; 1890 } 1891 1892 /* If stdin is a file use its mtime, otherwise use current time */ 1893 ret = fstat(STDIN_FILENO, &sb); 1894 if (ret < 0) { 1895 maybe_warn("Can't stat stdin"); 1896 return; 1897 } 1898 1899 if (S_ISREG(sb.st_mode)) { 1900 infile_set("(stdout)", sb.st_size); 1901 mtime = (uint32_t)sb.st_mtime; 1902 } else { 1903 systime = time(NULL); 1904 if (systime == -1) { 1905 maybe_warn("time"); 1906 return; 1907 } 1908 mtime = (uint32_t)systime; 1909 } 1910 1911 usize = 1912 #endif 1913 gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime); 1914 #ifndef SMALL 1915 if (vflag && !tflag && usize != -1 && gsize != -1) 1916 print_verbage(NULL, NULL, usize, gsize); 1917 #endif 1918 } 1919 1920 /* do what is asked for, for the path name */ 1921 static void 1922 handle_pathname(char *path) 1923 { 1924 char *opath = path, *s = NULL; 1925 ssize_t len; 1926 int slen; 1927 struct stat sb; 1928 1929 /* check for stdout/stdin */ 1930 if (path[0] == '-' && path[1] == '\0') { 1931 if (dflag) 1932 handle_stdin(); 1933 else 1934 handle_stdout(); 1935 return; 1936 } 1937 1938 retry: 1939 if (stat(path, &sb) != 0) { 1940 /* lets try <path>.gz if we're decompressing */ 1941 if (dflag && s == NULL && errno == ENOENT) { 1942 len = strlen(path); 1943 slen = suffixes[0].ziplen; 1944 s = malloc(len + slen + 1); 1945 if (s == NULL) 1946 maybe_err("malloc"); 1947 memcpy(s, path, len); 1948 memcpy(s + len, suffixes[0].zipped, slen + 1); 1949 path = s; 1950 goto retry; 1951 } 1952 maybe_warn("can't stat: %s", opath); 1953 goto out; 1954 } 1955 1956 if (S_ISDIR(sb.st_mode)) { 1957 #ifndef SMALL 1958 if (rflag) 1959 handle_dir(path); 1960 else 1961 #endif 1962 maybe_warnx("%s is a directory", path); 1963 goto out; 1964 } 1965 1966 if (S_ISREG(sb.st_mode)) 1967 handle_file(path, &sb); 1968 else 1969 maybe_warnx("%s is not a regular file", path); 1970 1971 out: 1972 if (s) 1973 free(s); 1974 } 1975 1976 /* compress/decompress a file */ 1977 static void 1978 handle_file(char *file, struct stat *sbp) 1979 { 1980 off_t usize, gsize; 1981 char outfile[PATH_MAX]; 1982 1983 infile_set(file, sbp->st_size); 1984 if (dflag) { 1985 usize = file_uncompress(file, outfile, sizeof(outfile)); 1986 #ifndef SMALL 1987 if (vflag && tflag) 1988 print_test(file, usize != -1); 1989 #endif 1990 if (usize == -1) 1991 return; 1992 gsize = sbp->st_size; 1993 } else { 1994 gsize = file_compress(file, outfile, sizeof(outfile)); 1995 if (gsize == -1) 1996 return; 1997 usize = sbp->st_size; 1998 } 1999 infile_clear(); 2000 2001 #ifndef SMALL 2002 if (vflag && !tflag) 2003 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 2004 #endif 2005 } 2006 2007 #ifndef SMALL 2008 /* this is used with -r to recursively descend directories */ 2009 static void 2010 handle_dir(char *dir) 2011 { 2012 char *path_argv[2]; 2013 FTS *fts; 2014 FTSENT *entry; 2015 2016 path_argv[0] = dir; 2017 path_argv[1] = 0; 2018 fts = fts_open(path_argv, FTS_PHYSICAL, NULL); 2019 if (fts == NULL) { 2020 warn("couldn't fts_open %s", dir); 2021 return; 2022 } 2023 2024 while ((entry = fts_read(fts))) { 2025 switch(entry->fts_info) { 2026 case FTS_D: 2027 case FTS_DP: 2028 continue; 2029 2030 case FTS_DNR: 2031 case FTS_ERR: 2032 case FTS_NS: 2033 maybe_warn("%s", entry->fts_path); 2034 continue; 2035 case FTS_F: 2036 handle_file(entry->fts_name, entry->fts_statp); 2037 } 2038 } 2039 (void)fts_close(fts); 2040 } 2041 #endif 2042 2043 /* print a ratio - size reduction as a fraction of uncompressed size */ 2044 static void 2045 print_ratio(off_t in, off_t out, FILE *where) 2046 { 2047 int percent10; /* 10 * percent */ 2048 off_t diff; 2049 char buff[8]; 2050 int len; 2051 2052 diff = in - out/2; 2053 if (in == 0 && out == 0) 2054 percent10 = 0; 2055 else if (diff < 0) 2056 /* 2057 * Output is more than double size of input! print -99.9% 2058 * Quite possibly we've failed to get the original size. 2059 */ 2060 percent10 = -999; 2061 else { 2062 /* 2063 * We only need 12 bits of result from the final division, 2064 * so reduce the values until a 32bit division will suffice. 2065 */ 2066 while (in > 0x100000) { 2067 diff >>= 1; 2068 in >>= 1; 2069 } 2070 if (in != 0) 2071 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 2072 else 2073 percent10 = 0; 2074 } 2075 2076 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 2077 /* Move the '.' to before the last digit */ 2078 buff[len - 1] = buff[len - 2]; 2079 buff[len - 2] = '.'; 2080 fprintf(where, "%5s%%", buff); 2081 } 2082 2083 #ifndef SMALL 2084 /* print compression statistics, and the new name (if there is one!) */ 2085 static void 2086 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 2087 { 2088 if (file) 2089 fprintf(stderr, "%s:%s ", file, 2090 strlen(file) < 7 ? "\t\t" : "\t"); 2091 print_ratio(usize, gsize, stderr); 2092 if (nfile) 2093 fprintf(stderr, " -- replaced with %s", nfile); 2094 fprintf(stderr, "\n"); 2095 fflush(stderr); 2096 } 2097 2098 /* print test results */ 2099 static void 2100 print_test(const char *file, int ok) 2101 { 2102 2103 if (exit_value == 0 && ok == 0) 2104 exit_value = 1; 2105 fprintf(stderr, "%s:%s %s\n", file, 2106 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 2107 fflush(stderr); 2108 } 2109 #endif 2110 2111 /* print a file's info ala --list */ 2112 /* eg: 2113 compressed uncompressed ratio uncompressed_name 2114 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 2115 */ 2116 static void 2117 print_list(int fd, off_t out, const char *outfile, time_t ts) 2118 { 2119 static int first = 1; 2120 #ifndef SMALL 2121 static off_t in_tot, out_tot; 2122 uint32_t crc = 0; 2123 #endif 2124 off_t in = 0, rv; 2125 2126 if (first) { 2127 #ifndef SMALL 2128 if (vflag) 2129 printf("method crc date time "); 2130 #endif 2131 if (qflag == 0) 2132 printf(" compressed uncompressed " 2133 "ratio uncompressed_name\n"); 2134 } 2135 first = 0; 2136 2137 /* print totals? */ 2138 #ifndef SMALL 2139 if (fd == -1) { 2140 in = in_tot; 2141 out = out_tot; 2142 } else 2143 #endif 2144 { 2145 /* read the last 4 bytes - this is the uncompressed size */ 2146 rv = lseek(fd, (off_t)(-8), SEEK_END); 2147 if (rv != -1) { 2148 unsigned char buf[8]; 2149 uint32_t usize; 2150 2151 rv = read(fd, (char *)buf, sizeof(buf)); 2152 if (rv == -1) 2153 maybe_warn("read of uncompressed size"); 2154 else if (rv != sizeof(buf)) 2155 maybe_warnx("read of uncompressed size"); 2156 2157 else { 2158 usize = buf[4]; 2159 usize |= (unsigned int)buf[5] << 8; 2160 usize |= (unsigned int)buf[6] << 16; 2161 usize |= (unsigned int)buf[7] << 24; 2162 in = (off_t)usize; 2163 #ifndef SMALL 2164 crc = buf[0]; 2165 crc |= (unsigned int)buf[1] << 8; 2166 crc |= (unsigned int)buf[2] << 16; 2167 crc |= (unsigned int)buf[3] << 24; 2168 #endif 2169 } 2170 } 2171 } 2172 2173 #ifndef SMALL 2174 if (vflag && fd == -1) 2175 printf(" "); 2176 else if (vflag) { 2177 char *date = ctime(&ts); 2178 2179 /* skip the day, 1/100th second, and year */ 2180 date += 4; 2181 date[12] = 0; 2182 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 2183 } 2184 in_tot += in; 2185 out_tot += out; 2186 #endif 2187 print_list_out(out, in, outfile); 2188 } 2189 2190 static void 2191 print_list_out(off_t out, off_t in, const char *outfile) 2192 { 2193 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 2194 print_ratio(in, out, stdout); 2195 printf(" %s\n", outfile); 2196 } 2197 2198 /* display the usage of NetBSD gzip */ 2199 static void 2200 usage(void) 2201 { 2202 2203 fprintf(stderr, "%s\n", gzip_version); 2204 fprintf(stderr, 2205 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n" 2206 #ifndef SMALL 2207 " -1 --fast fastest (worst) compression\n" 2208 " -2 .. -8 set compression level\n" 2209 " -9 --best best (slowest) compression\n" 2210 " -c --stdout write to stdout, keep original files\n" 2211 " --to-stdout\n" 2212 " -d --decompress uncompress files\n" 2213 " --uncompress\n" 2214 " -f --force force overwriting & compress links\n" 2215 " -h --help display this help\n" 2216 " -k --keep don't delete input files during operation\n" 2217 " -l --list list compressed file contents\n" 2218 " -N --name save or restore original file name and time stamp\n" 2219 " -n --no-name don't save original file name or time stamp\n" 2220 " -q --quiet output no warnings\n" 2221 " -r --recursive recursively compress files in directories\n" 2222 " -S .suf use suffix .suf instead of .gz\n" 2223 " --suffix .suf\n" 2224 " -t --test test compressed file\n" 2225 " -V --version display program version\n" 2226 " -v --verbose print extra statistics\n", 2227 #else 2228 , 2229 #endif 2230 getprogname()); 2231 exit(0); 2232 } 2233 2234 /* display the version of NetBSD gzip */ 2235 static void 2236 display_version(void) 2237 { 2238 2239 fprintf(stderr, "%s\n", gzip_version); 2240 exit(0); 2241 } 2242 2243 #ifndef NO_BZIP2_SUPPORT 2244 #include "unbzip2.c" 2245 #endif 2246 #ifndef NO_COMPRESS_SUPPORT 2247 #include "zuncompress.c" 2248 #endif 2249 #ifndef NO_PACK_SUPPORT 2250 #include "unpack.c" 2251 #endif 2252 #ifndef NO_XZ_SUPPORT 2253 #include "unxz.c" 2254 #endif 2255 #ifndef NO_LZ_SUPPORT 2256 #include "unlz.c" 2257 #endif 2258 2259 static ssize_t 2260 read_retry(int fd, void *buf, size_t sz) 2261 { 2262 char *cp = buf; 2263 size_t left = MIN(sz, (size_t) SSIZE_MAX); 2264 2265 while (left > 0) { 2266 ssize_t ret; 2267 2268 ret = read(fd, cp, left); 2269 if (ret == -1) { 2270 return ret; 2271 } else if (ret == 0) { 2272 break; /* EOF */ 2273 } 2274 cp += ret; 2275 left -= ret; 2276 } 2277 2278 return sz - left; 2279 } 2280 2281 static ssize_t 2282 write_retry(int fd, const void *buf, size_t sz) 2283 { 2284 const char *cp = buf; 2285 size_t left = MIN(sz, (size_t) SSIZE_MAX); 2286 2287 while (left > 0) { 2288 ssize_t ret; 2289 2290 ret = write(fd, cp, left); 2291 if (ret == -1) { 2292 return ret; 2293 } else if (ret == 0) { 2294 abort(); /* Can't happen */ 2295 } 2296 cp += ret; 2297 left -= ret; 2298 } 2299 2300 return sz - left; 2301 } 2302