1 /* $NetBSD: gzip.c,v 1.116 2018/10/27 11:39:12 skrll Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause 5 * 6 * Copyright (c) 1997, 1998, 2003, 2004, 2006, 2008, 2009, 2010, 2011, 2015, 2017 7 * Matthew R. Green 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 */ 32 33 /* 34 * gzip.c -- GPL free gzip using zlib. 35 * 36 * RFC 1950 covers the zlib format 37 * RFC 1951 covers the deflate format 38 * RFC 1952 covers the gzip format 39 * 40 * TODO: 41 * - use mmap where possible 42 * - make bzip2/compress -v/-t/-l support work as well as possible 43 */ 44 45 #include <sys/endian.h> 46 #include <sys/param.h> 47 #include <sys/stat.h> 48 #include <sys/time.h> 49 50 #include <inttypes.h> 51 #include <unistd.h> 52 #include <stdio.h> 53 #include <string.h> 54 #include <stdlib.h> 55 #include <err.h> 56 #include <errno.h> 57 #include <fcntl.h> 58 #include <zlib.h> 59 #include <fts.h> 60 #include <libgen.h> 61 #include <stdarg.h> 62 #include <getopt.h> 63 #include <time.h> 64 65 /* what type of file are we dealing with */ 66 enum filetype { 67 FT_GZIP, 68 #ifndef NO_BZIP2_SUPPORT 69 FT_BZIP2, 70 #endif 71 #ifndef NO_COMPRESS_SUPPORT 72 FT_Z, 73 #endif 74 #ifndef NO_PACK_SUPPORT 75 FT_PACK, 76 #endif 77 #ifndef NO_XZ_SUPPORT 78 FT_XZ, 79 #endif 80 #ifndef NO_LZ_SUPPORT 81 FT_LZ, 82 #endif 83 #ifndef NO_ZSTD_SUPPORT 84 FT_ZSTD, 85 #endif 86 FT_LAST, 87 FT_UNKNOWN 88 }; 89 90 #ifndef NO_BZIP2_SUPPORT 91 #include <bzlib.h> 92 93 #define BZ2_SUFFIX ".bz2" 94 #define BZIP2_MAGIC "BZh" 95 #endif 96 97 #ifndef NO_COMPRESS_SUPPORT 98 #define Z_SUFFIX ".Z" 99 #define Z_MAGIC "\037\235" 100 #endif 101 102 #ifndef NO_PACK_SUPPORT 103 #define PACK_MAGIC "\037\036" 104 #endif 105 106 #ifndef NO_XZ_SUPPORT 107 #include <lzma.h> 108 #define XZ_SUFFIX ".xz" 109 #define XZ_MAGIC "\3757zXZ" 110 #endif 111 112 #ifndef NO_LZ_SUPPORT 113 #define LZ_SUFFIX ".lz" 114 #define LZ_MAGIC "LZIP" 115 #endif 116 117 #ifndef NO_ZSTD_SUPPORT 118 #include <zstd.h> 119 #define ZSTD_SUFFIX ".zst" 120 #define ZSTD_MAGIC "\050\265\057\375" 121 #endif 122 123 #define GZ_SUFFIX ".gz" 124 125 #define BUFLEN (64 * 1024) 126 127 #define GZIP_MAGIC0 0x1F 128 #define GZIP_MAGIC1 0x8B 129 #define GZIP_OMAGIC1 0x9E 130 131 #define GZIP_TIMESTAMP (off_t)4 132 #define GZIP_ORIGNAME (off_t)10 133 134 #define HEAD_CRC 0x02 135 #define EXTRA_FIELD 0x04 136 #define ORIG_NAME 0x08 137 #define COMMENT 0x10 138 139 #define OS_CODE 3 /* Unix */ 140 141 typedef struct { 142 const char *zipped; 143 int ziplen; 144 const char *normal; /* for unzip - must not be longer than zipped */ 145 } suffixes_t; 146 static suffixes_t suffixes[] = { 147 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N} 148 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */ 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 SUFFIX(".tbz", ".tar"), 159 SUFFIX(".tbz2", ".tar"), 160 #endif 161 #ifndef NO_COMPRESS_SUPPORT 162 SUFFIX(Z_SUFFIX, ""), 163 #endif 164 #ifndef NO_XZ_SUPPORT 165 SUFFIX(XZ_SUFFIX, ""), 166 #endif 167 #ifndef NO_LZ_SUPPORT 168 SUFFIX(LZ_SUFFIX, ""), 169 #endif 170 #ifndef NO_ZSTD_SUPPORT 171 SUFFIX(ZSTD_SUFFIX, ""), 172 #endif 173 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */ 174 #undef SUFFIX 175 }; 176 #define NUM_SUFFIXES (nitems(suffixes)) 177 #define SUFFIX_MAXLEN 30 178 179 static const char gzip_version[] = "FreeBSD gzip 20190107"; 180 181 static const char gzip_copyright[] = \ 182 " Copyright (c) 1997, 1998, 2003, 2004, 2006 Matthew R. Green\n" 183 " All rights reserved.\n" 184 "\n" 185 " Redistribution and use in source and binary forms, with or without\n" 186 " modification, are permitted provided that the following conditions\n" 187 " are met:\n" 188 " 1. Redistributions of source code must retain the above copyright\n" 189 " notice, this list of conditions and the following disclaimer.\n" 190 " 2. Redistributions in binary form must reproduce the above copyright\n" 191 " notice, this list of conditions and the following disclaimer in the\n" 192 " documentation and/or other materials provided with the distribution.\n" 193 "\n" 194 " THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR\n" 195 " IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES\n" 196 " OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.\n" 197 " IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,\n" 198 " INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,\n" 199 " BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\n" 200 " LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED\n" 201 " AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,\n" 202 " OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\n" 203 " OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\n" 204 " SUCH DAMAGE."; 205 206 static int cflag; /* stdout mode */ 207 static int dflag; /* decompress mode */ 208 static int lflag; /* list mode */ 209 static int numflag = 6; /* gzip -1..-9 value */ 210 211 static const char *remove_file = NULL; /* file to be removed upon SIGINT */ 212 213 static int fflag; /* force mode */ 214 static int kflag; /* don't delete input files */ 215 static int nflag; /* don't save name/timestamp */ 216 static int Nflag; /* don't restore name/timestamp */ 217 static int qflag; /* quiet mode */ 218 static int rflag; /* recursive mode */ 219 static int tflag; /* test */ 220 static int vflag; /* verbose mode */ 221 static sig_atomic_t print_info = 0; 222 223 static int exit_value = 0; /* exit value */ 224 225 static const char *infile; /* name of file coming in */ 226 227 static void maybe_err(const char *fmt, ...) __printflike(1, 2) __dead2; 228 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \ 229 !defined(NO_XZ_SUPPORT) || !defined(NO_ZSTD_SUPPORT) 230 static void maybe_errx(const char *fmt, ...) __printflike(1, 2) __dead2; 231 #endif 232 static void maybe_warn(const char *fmt, ...) __printflike(1, 2); 233 static void maybe_warnx(const char *fmt, ...) __printflike(1, 2); 234 static enum filetype file_gettype(u_char *); 235 static off_t gz_compress(int, int, off_t *, const char *, uint32_t); 236 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *); 237 static off_t file_compress(char *, char *, size_t); 238 static off_t file_uncompress(char *, char *, size_t); 239 static void handle_pathname(char *); 240 static void handle_file(char *, struct stat *); 241 static void handle_stdin(void); 242 static void handle_stdout(void); 243 static void print_ratio(off_t, off_t, FILE *); 244 static void print_list(int fd, off_t, const char *, time_t); 245 static void usage(void) __dead2; 246 static void display_version(void) __dead2; 247 static void display_license(void); 248 static const suffixes_t *check_suffix(char *, int); 249 static ssize_t read_retry(int, void *, size_t); 250 static ssize_t write_retry(int, const void *, size_t); 251 static void print_list_out(off_t, off_t, const char*); 252 253 static void infile_set(const char *newinfile, off_t total); 254 255 static off_t infile_total; /* total expected to read/write */ 256 static off_t infile_current; /* current read/write */ 257 258 static void check_siginfo(void); 259 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd); 260 static void prepend_gzip(char *, int *, char ***); 261 static void handle_dir(char *); 262 static void print_verbage(const char *, const char *, off_t, off_t); 263 static void print_test(const char *, int); 264 static void copymodes(int fd, const struct stat *, const char *file); 265 static int check_outfile(const char *outfile); 266 static void setup_signals(void); 267 static void infile_newdata(size_t newdata); 268 static void infile_clear(void); 269 270 #ifndef NO_BZIP2_SUPPORT 271 static off_t unbzip2(int, int, char *, size_t, off_t *); 272 #endif 273 274 #ifndef NO_COMPRESS_SUPPORT 275 static FILE *zdopen(int); 276 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *); 277 #endif 278 279 #ifndef NO_PACK_SUPPORT 280 static off_t unpack(int, int, char *, size_t, off_t *); 281 #endif 282 283 #ifndef NO_XZ_SUPPORT 284 static off_t unxz(int, int, char *, size_t, off_t *); 285 static off_t unxz_len(int); 286 #endif 287 288 #ifndef NO_LZ_SUPPORT 289 static off_t unlz(int, int, char *, size_t, off_t *); 290 #endif 291 292 #ifndef NO_ZSTD_SUPPORT 293 static off_t unzstd(int, int, char *, size_t, off_t *); 294 #endif 295 296 static const struct option longopts[] = { 297 { "stdout", no_argument, 0, 'c' }, 298 { "to-stdout", no_argument, 0, 'c' }, 299 { "decompress", no_argument, 0, 'd' }, 300 { "uncompress", no_argument, 0, 'd' }, 301 { "force", no_argument, 0, 'f' }, 302 { "help", no_argument, 0, 'h' }, 303 { "keep", no_argument, 0, 'k' }, 304 { "list", no_argument, 0, 'l' }, 305 { "no-name", no_argument, 0, 'n' }, 306 { "name", no_argument, 0, 'N' }, 307 { "quiet", no_argument, 0, 'q' }, 308 { "recursive", no_argument, 0, 'r' }, 309 { "suffix", required_argument, 0, 'S' }, 310 { "test", no_argument, 0, 't' }, 311 { "verbose", no_argument, 0, 'v' }, 312 { "version", no_argument, 0, 'V' }, 313 { "fast", no_argument, 0, '1' }, 314 { "best", no_argument, 0, '9' }, 315 { "ascii", no_argument, 0, 'a' }, 316 { "license", no_argument, 0, 'L' }, 317 { NULL, no_argument, 0, 0 }, 318 }; 319 320 int 321 main(int argc, char **argv) 322 { 323 const char *progname = getprogname(); 324 char *gzip; 325 int len; 326 int ch; 327 328 setup_signals(); 329 330 if ((gzip = getenv("GZIP")) != NULL) 331 prepend_gzip(gzip, &argc, &argv); 332 333 /* 334 * XXX 335 * handle being called `gunzip', `zcat' and `gzcat' 336 */ 337 if (strcmp(progname, "gunzip") == 0) 338 dflag = 1; 339 else if (strcmp(progname, "zcat") == 0 || 340 strcmp(progname, "gzcat") == 0) 341 dflag = cflag = 1; 342 343 #define OPT_LIST "123456789acdfhklLNnqrS:tVv" 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 case 'a': 366 fprintf(stderr, "%s: option --ascii ignored on this system\n", progname); 367 break; 368 case 'f': 369 fflag = 1; 370 break; 371 case 'k': 372 kflag = 1; 373 break; 374 case 'L': 375 display_license(); 376 /* NOT REACHED */ 377 case 'N': 378 nflag = 0; 379 Nflag = 1; 380 break; 381 case 'n': 382 nflag = 1; 383 Nflag = 0; 384 break; 385 case 'q': 386 qflag = 1; 387 break; 388 case 'r': 389 rflag = 1; 390 break; 391 case 'S': 392 len = strlen(optarg); 393 if (len != 0) { 394 if (len > SUFFIX_MAXLEN) 395 errx(1, "incorrect suffix: '%s': too long", optarg); 396 suffixes[0].zipped = optarg; 397 suffixes[0].ziplen = len; 398 } else { 399 suffixes[NUM_SUFFIXES - 1].zipped = ""; 400 suffixes[NUM_SUFFIXES - 1].ziplen = 0; 401 } 402 break; 403 case 't': 404 cflag = 1; 405 tflag = 1; 406 dflag = 1; 407 break; 408 case 'v': 409 vflag = 1; 410 break; 411 default: 412 usage(); 413 /* NOTREACHED */ 414 } 415 } 416 argv += optind; 417 argc -= optind; 418 419 if (argc == 0) { 420 if (dflag) /* stdin mode */ 421 handle_stdin(); 422 else /* stdout mode */ 423 handle_stdout(); 424 } else { 425 do { 426 handle_pathname(argv[0]); 427 } while (*++argv); 428 } 429 if (qflag == 0 && lflag && argc > 1) 430 print_list(-1, 0, "(totals)", 0); 431 exit(exit_value); 432 } 433 434 /* maybe print a warning */ 435 void 436 maybe_warn(const char *fmt, ...) 437 { 438 va_list ap; 439 440 if (qflag == 0) { 441 va_start(ap, fmt); 442 vwarn(fmt, ap); 443 va_end(ap); 444 } 445 if (exit_value == 0) 446 exit_value = 1; 447 } 448 449 /* ... without an errno. */ 450 void 451 maybe_warnx(const char *fmt, ...) 452 { 453 va_list ap; 454 455 if (qflag == 0) { 456 va_start(ap, fmt); 457 vwarnx(fmt, ap); 458 va_end(ap); 459 } 460 if (exit_value == 0) 461 exit_value = 1; 462 } 463 464 /* maybe print an error */ 465 void 466 maybe_err(const char *fmt, ...) 467 { 468 va_list ap; 469 470 if (qflag == 0) { 471 va_start(ap, fmt); 472 vwarn(fmt, ap); 473 va_end(ap); 474 } 475 exit(2); 476 } 477 478 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \ 479 !defined(NO_XZ_SUPPORT) || !defined(NO_ZSTD_SUPPORT) 480 /* ... without an errno. */ 481 void 482 maybe_errx(const char *fmt, ...) 483 { 484 va_list ap; 485 486 if (qflag == 0) { 487 va_start(ap, fmt); 488 vwarnx(fmt, ap); 489 va_end(ap); 490 } 491 exit(2); 492 } 493 #endif 494 495 /* split up $GZIP and prepend it to the argument list */ 496 static void 497 prepend_gzip(char *gzip, int *argc, char ***argv) 498 { 499 char *s, **nargv, **ac; 500 int nenvarg = 0, i; 501 502 /* scan how many arguments there are */ 503 for (s = gzip;;) { 504 while (*s == ' ' || *s == '\t') 505 s++; 506 if (*s == 0) 507 goto count_done; 508 nenvarg++; 509 while (*s != ' ' && *s != '\t') 510 if (*s++ == 0) 511 goto count_done; 512 } 513 count_done: 514 /* punt early */ 515 if (nenvarg == 0) 516 return; 517 518 *argc += nenvarg; 519 ac = *argv; 520 521 nargv = (char **)malloc((*argc + 1) * sizeof(char *)); 522 if (nargv == NULL) 523 maybe_err("malloc"); 524 525 /* stash this away */ 526 *argv = nargv; 527 528 /* copy the program name first */ 529 i = 0; 530 nargv[i++] = *(ac++); 531 532 /* take a copy of $GZIP and add it to the array */ 533 s = strdup(gzip); 534 if (s == NULL) 535 maybe_err("strdup"); 536 for (;;) { 537 /* Skip whitespaces. */ 538 while (*s == ' ' || *s == '\t') 539 s++; 540 if (*s == 0) 541 goto copy_done; 542 nargv[i++] = s; 543 /* Find the end of this argument. */ 544 while (*s != ' ' && *s != '\t') 545 if (*s++ == 0) 546 /* Argument followed by NUL. */ 547 goto copy_done; 548 /* Terminate by overwriting ' ' or '\t' with NUL. */ 549 *s++ = 0; 550 } 551 copy_done: 552 553 /* copy the original arguments and a NULL */ 554 while (*ac) 555 nargv[i++] = *(ac++); 556 nargv[i] = NULL; 557 } 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; 569 570 outbufp = malloc(BUFLEN); 571 inbufp = malloc(BUFLEN); 572 if (outbufp == NULL || inbufp == NULL) { 573 maybe_err("malloc failed"); 574 goto out; 575 } 576 577 memset(&z, 0, sizeof z); 578 z.zalloc = Z_NULL; 579 z.zfree = Z_NULL; 580 z.opaque = 0; 581 582 if (nflag != 0) { 583 mtime = 0; 584 origname = ""; 585 } 586 587 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s", 588 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 589 *origname ? ORIG_NAME : 0, 590 mtime & 0xff, 591 (mtime >> 8) & 0xff, 592 (mtime >> 16) & 0xff, 593 (mtime >> 24) & 0xff, 594 numflag == 1 ? 4 : numflag == 9 ? 2 : 0, 595 OS_CODE, origname); 596 if (i >= BUFLEN) 597 /* this need PATH_MAX > BUFLEN ... */ 598 maybe_err("snprintf"); 599 if (*origname) 600 i++; 601 602 z.next_out = (unsigned char *)outbufp + i; 603 z.avail_out = BUFLEN - i; 604 605 error = deflateInit2(&z, numflag, Z_DEFLATED, 606 (-MAX_WBITS), 8, Z_DEFAULT_STRATEGY); 607 if (error != Z_OK) { 608 maybe_warnx("deflateInit2 failed"); 609 in_tot = -1; 610 goto out; 611 } 612 613 crc = crc32(0L, Z_NULL, 0); 614 for (;;) { 615 if (z.avail_out == 0) { 616 if (write_retry(out, outbufp, BUFLEN) != BUFLEN) { 617 maybe_warn("write"); 618 out_tot = -1; 619 goto out; 620 } 621 622 out_tot += BUFLEN; 623 z.next_out = (unsigned char *)outbufp; 624 z.avail_out = BUFLEN; 625 } 626 627 if (z.avail_in == 0) { 628 in_size = read(in, inbufp, BUFLEN); 629 if (in_size < 0) { 630 maybe_warn("read"); 631 in_tot = -1; 632 goto out; 633 } 634 if (in_size == 0) 635 break; 636 infile_newdata(in_size); 637 638 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size); 639 in_tot += in_size; 640 z.next_in = (unsigned char *)inbufp; 641 z.avail_in = in_size; 642 } 643 644 error = deflate(&z, Z_NO_FLUSH); 645 if (error != Z_OK && error != Z_STREAM_END) { 646 maybe_warnx("deflate failed"); 647 in_tot = -1; 648 goto out; 649 } 650 } 651 652 /* clean up */ 653 for (;;) { 654 size_t len; 655 ssize_t w; 656 657 error = deflate(&z, Z_FINISH); 658 if (error != Z_OK && error != Z_STREAM_END) { 659 maybe_warnx("deflate failed"); 660 in_tot = -1; 661 goto out; 662 } 663 664 len = (char *)z.next_out - outbufp; 665 666 w = write_retry(out, outbufp, len); 667 if (w == -1 || (size_t)w != len) { 668 maybe_warn("write"); 669 out_tot = -1; 670 goto out; 671 } 672 out_tot += len; 673 z.next_out = (unsigned char *)outbufp; 674 z.avail_out = BUFLEN; 675 676 if (error == Z_STREAM_END) 677 break; 678 } 679 680 if (deflateEnd(&z) != Z_OK) { 681 maybe_warnx("deflateEnd failed"); 682 in_tot = -1; 683 goto out; 684 } 685 686 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c", 687 (int)crc & 0xff, 688 (int)(crc >> 8) & 0xff, 689 (int)(crc >> 16) & 0xff, 690 (int)(crc >> 24) & 0xff, 691 (int)in_tot & 0xff, 692 (int)(in_tot >> 8) & 0xff, 693 (int)(in_tot >> 16) & 0xff, 694 (int)(in_tot >> 24) & 0xff); 695 if (i != 8) 696 maybe_err("snprintf"); 697 if (write_retry(out, outbufp, i) != i) { 698 maybe_warn("write"); 699 in_tot = -1; 700 } else 701 out_tot += i; 702 703 out: 704 if (inbufp != NULL) 705 free(inbufp); 706 if (outbufp != NULL) 707 free(outbufp); 708 if (gsizep) 709 *gsizep = out_tot; 710 return in_tot; 711 } 712 713 /* 714 * uncompress input to output then close the input. return the 715 * uncompressed size written, and put the compressed sized read 716 * into `*gsizep'. 717 */ 718 static off_t 719 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep, 720 const char *filename) 721 { 722 z_stream z; 723 char *outbufp, *inbufp; 724 off_t out_tot = -1, in_tot = 0; 725 uint32_t out_sub_tot = 0; 726 enum { 727 GZSTATE_MAGIC0, 728 GZSTATE_MAGIC1, 729 GZSTATE_METHOD, 730 GZSTATE_FLAGS, 731 GZSTATE_SKIPPING, 732 GZSTATE_EXTRA, 733 GZSTATE_EXTRA2, 734 GZSTATE_EXTRA3, 735 GZSTATE_ORIGNAME, 736 GZSTATE_COMMENT, 737 GZSTATE_HEAD_CRC1, 738 GZSTATE_HEAD_CRC2, 739 GZSTATE_INIT, 740 GZSTATE_READ, 741 GZSTATE_CRC, 742 GZSTATE_LEN, 743 } state = GZSTATE_MAGIC0; 744 int flags = 0, skip_count = 0; 745 int error = Z_STREAM_ERROR, done_reading = 0; 746 uLong crc = 0; 747 ssize_t wr; 748 int needmore = 0; 749 750 #define ADVANCE() { z.next_in++; z.avail_in--; } 751 752 if ((outbufp = malloc(BUFLEN)) == NULL) { 753 maybe_err("malloc failed"); 754 goto out2; 755 } 756 if ((inbufp = malloc(BUFLEN)) == NULL) { 757 maybe_err("malloc failed"); 758 goto out1; 759 } 760 761 memset(&z, 0, sizeof z); 762 z.avail_in = prelen; 763 z.next_in = (unsigned char *)pre; 764 z.avail_out = BUFLEN; 765 z.next_out = (unsigned char *)outbufp; 766 z.zalloc = NULL; 767 z.zfree = NULL; 768 z.opaque = 0; 769 770 in_tot = prelen; 771 out_tot = 0; 772 773 for (;;) { 774 check_siginfo(); 775 if ((z.avail_in == 0 || needmore) && done_reading == 0) { 776 ssize_t in_size; 777 778 if (z.avail_in > 0) { 779 memmove(inbufp, z.next_in, z.avail_in); 780 } 781 z.next_in = (unsigned char *)inbufp; 782 in_size = read(in, z.next_in + z.avail_in, 783 BUFLEN - z.avail_in); 784 785 if (in_size == -1) { 786 maybe_warn("failed to read stdin"); 787 goto stop_and_fail; 788 } else if (in_size == 0) { 789 done_reading = 1; 790 } 791 infile_newdata(in_size); 792 793 z.avail_in += in_size; 794 needmore = 0; 795 796 in_tot += in_size; 797 } 798 if (z.avail_in == 0) { 799 if (done_reading && state != GZSTATE_MAGIC0) { 800 maybe_warnx("%s: unexpected end of file", 801 filename); 802 goto stop_and_fail; 803 } 804 goto stop; 805 } 806 switch (state) { 807 case GZSTATE_MAGIC0: 808 if (*z.next_in != GZIP_MAGIC0) { 809 if (in_tot > 0) { 810 maybe_warnx("%s: trailing garbage " 811 "ignored", filename); 812 exit_value = 2; 813 goto stop; 814 } 815 maybe_warnx("input not gziped (MAGIC0)"); 816 goto stop_and_fail; 817 } 818 ADVANCE(); 819 state++; 820 out_sub_tot = 0; 821 crc = crc32(0L, Z_NULL, 0); 822 break; 823 824 case GZSTATE_MAGIC1: 825 if (*z.next_in != GZIP_MAGIC1 && 826 *z.next_in != GZIP_OMAGIC1) { 827 maybe_warnx("input not gziped (MAGIC1)"); 828 goto stop_and_fail; 829 } 830 ADVANCE(); 831 state++; 832 break; 833 834 case GZSTATE_METHOD: 835 if (*z.next_in != Z_DEFLATED) { 836 maybe_warnx("unknown compression method"); 837 goto stop_and_fail; 838 } 839 ADVANCE(); 840 state++; 841 break; 842 843 case GZSTATE_FLAGS: 844 flags = *z.next_in; 845 ADVANCE(); 846 skip_count = 6; 847 state++; 848 break; 849 850 case GZSTATE_SKIPPING: 851 if (skip_count > 0) { 852 skip_count--; 853 ADVANCE(); 854 } else 855 state++; 856 break; 857 858 case GZSTATE_EXTRA: 859 if ((flags & EXTRA_FIELD) == 0) { 860 state = GZSTATE_ORIGNAME; 861 break; 862 } 863 skip_count = *z.next_in; 864 ADVANCE(); 865 state++; 866 break; 867 868 case GZSTATE_EXTRA2: 869 skip_count |= ((*z.next_in) << 8); 870 ADVANCE(); 871 state++; 872 break; 873 874 case GZSTATE_EXTRA3: 875 if (skip_count > 0) { 876 skip_count--; 877 ADVANCE(); 878 } else 879 state++; 880 break; 881 882 case GZSTATE_ORIGNAME: 883 if ((flags & ORIG_NAME) == 0) { 884 state++; 885 break; 886 } 887 if (*z.next_in == 0) 888 state++; 889 ADVANCE(); 890 break; 891 892 case GZSTATE_COMMENT: 893 if ((flags & COMMENT) == 0) { 894 state++; 895 break; 896 } 897 if (*z.next_in == 0) 898 state++; 899 ADVANCE(); 900 break; 901 902 case GZSTATE_HEAD_CRC1: 903 if (flags & HEAD_CRC) 904 skip_count = 2; 905 else 906 skip_count = 0; 907 state++; 908 break; 909 910 case GZSTATE_HEAD_CRC2: 911 if (skip_count > 0) { 912 skip_count--; 913 ADVANCE(); 914 } else 915 state++; 916 break; 917 918 case GZSTATE_INIT: 919 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) { 920 maybe_warnx("failed to inflateInit"); 921 goto stop_and_fail; 922 } 923 state++; 924 break; 925 926 case GZSTATE_READ: 927 error = inflate(&z, Z_FINISH); 928 switch (error) { 929 /* Z_BUF_ERROR goes with Z_FINISH... */ 930 case Z_BUF_ERROR: 931 if (z.avail_out > 0 && !done_reading) 932 continue; 933 934 case Z_STREAM_END: 935 case Z_OK: 936 break; 937 938 case Z_NEED_DICT: 939 maybe_warnx("Z_NEED_DICT error"); 940 goto stop_and_fail; 941 case Z_DATA_ERROR: 942 maybe_warnx("data stream error"); 943 goto stop_and_fail; 944 case Z_STREAM_ERROR: 945 maybe_warnx("internal stream error"); 946 goto stop_and_fail; 947 case Z_MEM_ERROR: 948 maybe_warnx("memory allocation error"); 949 goto stop_and_fail; 950 951 default: 952 maybe_warn("unknown error from inflate(): %d", 953 error); 954 } 955 wr = BUFLEN - z.avail_out; 956 957 if (wr != 0) { 958 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 959 if ( 960 /* don't write anything with -t */ 961 tflag == 0 && 962 write_retry(out, outbufp, wr) != wr) { 963 maybe_warn("error writing to output"); 964 goto stop_and_fail; 965 } 966 967 out_tot += wr; 968 out_sub_tot += wr; 969 } 970 971 if (error == Z_STREAM_END) { 972 inflateEnd(&z); 973 state++; 974 } 975 976 z.next_out = (unsigned char *)outbufp; 977 z.avail_out = BUFLEN; 978 979 break; 980 case GZSTATE_CRC: 981 { 982 uLong origcrc; 983 984 if (z.avail_in < 4) { 985 if (!done_reading) { 986 needmore = 1; 987 continue; 988 } 989 maybe_warnx("truncated input"); 990 goto stop_and_fail; 991 } 992 origcrc = le32dec(&z.next_in[0]); 993 if (origcrc != crc) { 994 maybe_warnx("invalid compressed" 995 " data--crc error"); 996 goto stop_and_fail; 997 } 998 } 999 1000 z.avail_in -= 4; 1001 z.next_in += 4; 1002 1003 if (!z.avail_in && done_reading) { 1004 goto stop; 1005 } 1006 state++; 1007 break; 1008 case GZSTATE_LEN: 1009 { 1010 uLong origlen; 1011 1012 if (z.avail_in < 4) { 1013 if (!done_reading) { 1014 needmore = 1; 1015 continue; 1016 } 1017 maybe_warnx("truncated input"); 1018 goto stop_and_fail; 1019 } 1020 origlen = le32dec(&z.next_in[0]); 1021 1022 if (origlen != out_sub_tot) { 1023 maybe_warnx("invalid compressed" 1024 " data--length error"); 1025 goto stop_and_fail; 1026 } 1027 } 1028 1029 z.avail_in -= 4; 1030 z.next_in += 4; 1031 1032 if (error < 0) { 1033 maybe_warnx("decompression error"); 1034 goto stop_and_fail; 1035 } 1036 state = GZSTATE_MAGIC0; 1037 break; 1038 } 1039 continue; 1040 stop_and_fail: 1041 out_tot = -1; 1042 stop: 1043 break; 1044 } 1045 if (state > GZSTATE_INIT) 1046 inflateEnd(&z); 1047 1048 free(inbufp); 1049 out1: 1050 free(outbufp); 1051 out2: 1052 if (gsizep) 1053 *gsizep = in_tot; 1054 return (out_tot); 1055 } 1056 1057 /* 1058 * set the owner, mode, flags & utimes using the given file descriptor. 1059 * file is only used in possible warning messages. 1060 */ 1061 static void 1062 copymodes(int fd, const struct stat *sbp, const char *file) 1063 { 1064 struct timespec times[2]; 1065 struct stat sb; 1066 1067 /* 1068 * If we have no info on the input, give this file some 1069 * default values and return.. 1070 */ 1071 if (sbp == NULL) { 1072 mode_t mask = umask(022); 1073 1074 (void)fchmod(fd, DEFFILEMODE & ~mask); 1075 (void)umask(mask); 1076 return; 1077 } 1078 sb = *sbp; 1079 1080 /* if the chown fails, remove set-id bits as-per compress(1) */ 1081 if (fchown(fd, sb.st_uid, sb.st_gid) < 0) { 1082 if (errno != EPERM) 1083 maybe_warn("couldn't fchown: %s", file); 1084 sb.st_mode &= ~(S_ISUID|S_ISGID); 1085 } 1086 1087 /* we only allow set-id and the 9 normal permission bits */ 1088 sb.st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1089 if (fchmod(fd, sb.st_mode) < 0) 1090 maybe_warn("couldn't fchmod: %s", file); 1091 1092 times[0] = sb.st_atim; 1093 times[1] = sb.st_mtim; 1094 if (futimens(fd, times) < 0) 1095 maybe_warn("couldn't futimens: %s", file); 1096 1097 /* only try flags if they exist already */ 1098 if (sb.st_flags != 0 && fchflags(fd, sb.st_flags) < 0) 1099 maybe_warn("couldn't fchflags: %s", file); 1100 } 1101 1102 /* what sort of file is this? */ 1103 static enum filetype 1104 file_gettype(u_char *buf) 1105 { 1106 1107 if (buf[0] == GZIP_MAGIC0 && 1108 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1109 return FT_GZIP; 1110 #ifndef NO_BZIP2_SUPPORT 1111 else if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1112 buf[3] >= '0' && buf[3] <= '9') 1113 return FT_BZIP2; 1114 #endif 1115 #ifndef NO_COMPRESS_SUPPORT 1116 else if (memcmp(buf, Z_MAGIC, 2) == 0) 1117 return FT_Z; 1118 #endif 1119 #ifndef NO_PACK_SUPPORT 1120 else if (memcmp(buf, PACK_MAGIC, 2) == 0) 1121 return FT_PACK; 1122 #endif 1123 #ifndef NO_XZ_SUPPORT 1124 else if (memcmp(buf, XZ_MAGIC, 4) == 0) /* XXX: We only have 4 bytes */ 1125 return FT_XZ; 1126 #endif 1127 #ifndef NO_LZ_SUPPORT 1128 else if (memcmp(buf, LZ_MAGIC, 4) == 0) 1129 return FT_LZ; 1130 #endif 1131 #ifndef NO_ZSTD_SUPPORT 1132 else if (memcmp(buf, ZSTD_MAGIC, 4) == 0) 1133 return FT_ZSTD; 1134 #endif 1135 else 1136 return FT_UNKNOWN; 1137 } 1138 1139 /* check the outfile is OK. */ 1140 static int 1141 check_outfile(const char *outfile) 1142 { 1143 struct stat sb; 1144 int ok = 1; 1145 1146 if (lflag == 0 && stat(outfile, &sb) == 0) { 1147 if (fflag) 1148 unlink(outfile); 1149 else if (isatty(STDIN_FILENO)) { 1150 char ans[10] = { 'n', '\0' }; /* default */ 1151 1152 fprintf(stderr, "%s already exists -- do you wish to " 1153 "overwrite (y or n)? " , outfile); 1154 (void)fgets(ans, sizeof(ans) - 1, stdin); 1155 if (ans[0] != 'y' && ans[0] != 'Y') { 1156 fprintf(stderr, "\tnot overwriting\n"); 1157 ok = 0; 1158 } else 1159 unlink(outfile); 1160 } else { 1161 maybe_warnx("%s already exists -- skipping", outfile); 1162 ok = 0; 1163 } 1164 } 1165 return ok; 1166 } 1167 1168 static void 1169 unlink_input(const char *file, const struct stat *sb) 1170 { 1171 struct stat nsb; 1172 1173 if (kflag) 1174 return; 1175 if (stat(file, &nsb) != 0) 1176 /* Must be gone already */ 1177 return; 1178 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1179 /* Definitely a different file */ 1180 return; 1181 unlink(file); 1182 } 1183 1184 static void 1185 got_sigint(int signo __unused) 1186 { 1187 1188 if (remove_file != NULL) 1189 unlink(remove_file); 1190 _exit(2); 1191 } 1192 1193 static void 1194 got_siginfo(int signo __unused) 1195 { 1196 1197 print_info = 1; 1198 } 1199 1200 static void 1201 setup_signals(void) 1202 { 1203 1204 signal(SIGINFO, got_siginfo); 1205 signal(SIGINT, got_sigint); 1206 } 1207 1208 static void 1209 infile_newdata(size_t newdata) 1210 { 1211 1212 infile_current += newdata; 1213 } 1214 1215 static void 1216 infile_set(const char *newinfile, off_t total) 1217 { 1218 1219 if (newinfile) 1220 infile = newinfile; 1221 infile_total = total; 1222 } 1223 1224 static void 1225 infile_clear(void) 1226 { 1227 1228 infile = NULL; 1229 infile_total = infile_current = 0; 1230 } 1231 1232 static const suffixes_t * 1233 check_suffix(char *file, int xlate) 1234 { 1235 const suffixes_t *s; 1236 int len = strlen(file); 1237 char *sp; 1238 1239 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1240 /* if it doesn't fit in "a.suf", don't bother */ 1241 if (s->ziplen >= len) 1242 continue; 1243 sp = file + len - s->ziplen; 1244 if (strcmp(s->zipped, sp) != 0) 1245 continue; 1246 if (xlate) 1247 strcpy(sp, s->normal); 1248 return s; 1249 } 1250 return NULL; 1251 } 1252 1253 /* 1254 * compress the given file: create a corresponding .gz file and remove the 1255 * original. 1256 */ 1257 static off_t 1258 file_compress(char *file, char *outfile, size_t outsize) 1259 { 1260 int in; 1261 int out; 1262 off_t size, in_size; 1263 struct stat isb, osb; 1264 const suffixes_t *suff; 1265 1266 in = open(file, O_RDONLY); 1267 if (in == -1) { 1268 maybe_warn("can't open %s", file); 1269 return (-1); 1270 } 1271 1272 if (fstat(in, &isb) != 0) { 1273 maybe_warn("couldn't stat: %s", file); 1274 close(in); 1275 return (-1); 1276 } 1277 1278 if (fstat(in, &isb) != 0) { 1279 close(in); 1280 maybe_warn("can't stat %s", file); 1281 return -1; 1282 } 1283 infile_set(file, isb.st_size); 1284 1285 if (cflag == 0) { 1286 if (isb.st_nlink > 1 && fflag == 0) { 1287 maybe_warnx("%s has %ju other link%s -- " 1288 "skipping", file, 1289 (uintmax_t)isb.st_nlink - 1, 1290 isb.st_nlink == 1 ? "" : "s"); 1291 close(in); 1292 return -1; 1293 } 1294 1295 if (fflag == 0 && (suff = check_suffix(file, 0)) && 1296 suff->zipped[0] != 0) { 1297 maybe_warnx("%s already has %s suffix -- unchanged", 1298 file, suff->zipped); 1299 close(in); 1300 return (-1); 1301 } 1302 1303 /* Add (usually) .gz to filename */ 1304 if ((size_t)snprintf(outfile, outsize, "%s%s", 1305 file, suffixes[0].zipped) >= outsize) 1306 memcpy(outfile + outsize - suffixes[0].ziplen - 1, 1307 suffixes[0].zipped, suffixes[0].ziplen + 1); 1308 1309 if (check_outfile(outfile) == 0) { 1310 close(in); 1311 return (-1); 1312 } 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 remove_file = outfile; 1323 } else 1324 out = STDOUT_FILENO; 1325 1326 in_size = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1327 1328 (void)close(in); 1329 1330 /* 1331 * If there was an error, in_size will be -1. 1332 * If we compressed to stdout, just return the size. 1333 * Otherwise stat the file and check it is the correct size. 1334 * We only blow away the file if we can stat the output and it 1335 * has the expected size. 1336 */ 1337 if (cflag != 0) 1338 return in_size == -1 ? -1 : size; 1339 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 (%ju != %ju), deleting", 1347 outfile, (uintmax_t)osb.st_size, (uintmax_t)size); 1348 goto bad_outfile; 1349 } 1350 1351 copymodes(out, &isb, outfile); 1352 remove_file = NULL; 1353 if (close(out) == -1) 1354 maybe_warn("couldn't close output"); 1355 1356 /* output is good, ok to delete input */ 1357 unlink_input(file, &isb); 1358 return (size); 1359 1360 bad_outfile: 1361 if (close(out) == -1) 1362 maybe_warn("couldn't close output"); 1363 1364 maybe_warnx("leaving original %s", file); 1365 unlink(outfile); 1366 return (size); 1367 } 1368 1369 /* uncompress the given file and remove the original */ 1370 static off_t 1371 file_uncompress(char *file, char *outfile, size_t outsize) 1372 { 1373 struct stat isb, osb; 1374 off_t size; 1375 ssize_t rbytes; 1376 unsigned char fourbytes[4]; 1377 enum filetype method; 1378 int fd, ofd, zfd = -1; 1379 int error; 1380 size_t in_size; 1381 ssize_t rv; 1382 time_t timestamp = 0; 1383 char name[PATH_MAX + 1]; 1384 1385 /* gather the old name info */ 1386 1387 fd = open(file, O_RDONLY); 1388 if (fd < 0) { 1389 maybe_warn("can't open %s", file); 1390 goto lose; 1391 } 1392 if (fstat(fd, &isb) != 0) { 1393 maybe_warn("can't stat %s", file); 1394 goto lose; 1395 } 1396 if (S_ISREG(isb.st_mode)) 1397 in_size = isb.st_size; 1398 else 1399 in_size = 0; 1400 infile_set(file, in_size); 1401 1402 strlcpy(outfile, file, outsize); 1403 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1404 maybe_warnx("%s: unknown suffix -- ignored", file); 1405 goto lose; 1406 } 1407 1408 rbytes = read(fd, fourbytes, sizeof fourbytes); 1409 if (rbytes != sizeof fourbytes) { 1410 /* we don't want to fail here. */ 1411 if (fflag) 1412 goto lose; 1413 if (rbytes == -1) 1414 maybe_warn("can't read %s", file); 1415 else 1416 goto unexpected_EOF; 1417 goto lose; 1418 } 1419 infile_newdata(rbytes); 1420 1421 method = file_gettype(fourbytes); 1422 if (fflag == 0 && method == FT_UNKNOWN) { 1423 maybe_warnx("%s: not in gzip format", file); 1424 goto lose; 1425 } 1426 1427 1428 if (method == FT_GZIP && Nflag) { 1429 unsigned char ts[4]; /* timestamp */ 1430 1431 rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP); 1432 if (rv >= 0 && rv < (ssize_t)(sizeof ts)) 1433 goto unexpected_EOF; 1434 if (rv == -1) { 1435 if (!fflag) 1436 maybe_warn("can't read %s", file); 1437 goto lose; 1438 } 1439 infile_newdata(rv); 1440 timestamp = le32dec(&ts[0]); 1441 1442 if (fourbytes[3] & ORIG_NAME) { 1443 rbytes = pread(fd, name, sizeof(name) - 1, GZIP_ORIGNAME); 1444 if (rbytes < 0) { 1445 maybe_warn("can't read %s", file); 1446 goto lose; 1447 } 1448 if (name[0] != '\0') { 1449 char *dp, *nf; 1450 1451 /* Make sure that name is NUL-terminated */ 1452 name[rbytes] = '\0'; 1453 1454 /* strip saved directory name */ 1455 nf = strrchr(name, '/'); 1456 if (nf == NULL) 1457 nf = name; 1458 else 1459 nf++; 1460 1461 /* preserve original directory name */ 1462 dp = strrchr(file, '/'); 1463 if (dp == NULL) 1464 dp = file; 1465 else 1466 dp++; 1467 snprintf(outfile, outsize, "%.*s%.*s", 1468 (int) (dp - file), 1469 file, (int) rbytes, nf); 1470 } 1471 } 1472 } 1473 lseek(fd, 0, SEEK_SET); 1474 1475 if (cflag == 0 || lflag) { 1476 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1477 maybe_warnx("%s has %ju other links -- skipping", 1478 file, (uintmax_t)isb.st_nlink - 1); 1479 goto lose; 1480 } 1481 if (nflag == 0 && timestamp) 1482 isb.st_mtime = timestamp; 1483 if (check_outfile(outfile) == 0) 1484 goto lose; 1485 } 1486 1487 if (cflag) 1488 zfd = STDOUT_FILENO; 1489 else if (lflag) 1490 zfd = -1; 1491 else { 1492 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1493 if (zfd == STDOUT_FILENO) { 1494 /* We won't close STDOUT_FILENO later... */ 1495 zfd = dup(zfd); 1496 close(STDOUT_FILENO); 1497 } 1498 if (zfd == -1) { 1499 maybe_warn("can't open %s", outfile); 1500 goto lose; 1501 } 1502 remove_file = outfile; 1503 } 1504 1505 switch (method) { 1506 #ifndef NO_BZIP2_SUPPORT 1507 case FT_BZIP2: 1508 /* XXX */ 1509 if (lflag) { 1510 maybe_warnx("no -l with bzip2 files"); 1511 goto lose; 1512 } 1513 1514 size = unbzip2(fd, zfd, NULL, 0, NULL); 1515 break; 1516 #endif 1517 1518 #ifndef NO_COMPRESS_SUPPORT 1519 case FT_Z: { 1520 FILE *in, *out; 1521 1522 /* XXX */ 1523 if (lflag) { 1524 maybe_warnx("no -l with Lempel-Ziv files"); 1525 goto lose; 1526 } 1527 1528 if ((in = zdopen(fd)) == NULL) { 1529 maybe_warn("zdopen for read: %s", file); 1530 goto lose; 1531 } 1532 1533 out = fdopen(dup(zfd), "w"); 1534 if (out == NULL) { 1535 maybe_warn("fdopen for write: %s", outfile); 1536 fclose(in); 1537 goto lose; 1538 } 1539 1540 size = zuncompress(in, out, NULL, 0, NULL); 1541 /* need to fclose() if ferror() is true... */ 1542 error = ferror(in); 1543 if (error | fclose(in)) { 1544 if (error) 1545 maybe_warn("failed infile"); 1546 else 1547 maybe_warn("failed infile fclose"); 1548 if (cflag == 0) 1549 unlink(outfile); 1550 (void)fclose(out); 1551 goto lose; 1552 } 1553 if (fclose(out) != 0) { 1554 maybe_warn("failed outfile fclose"); 1555 if (cflag == 0) 1556 unlink(outfile); 1557 goto lose; 1558 } 1559 break; 1560 } 1561 #endif 1562 1563 #ifndef NO_PACK_SUPPORT 1564 case FT_PACK: 1565 if (lflag) { 1566 maybe_warnx("no -l with packed files"); 1567 goto lose; 1568 } 1569 1570 size = unpack(fd, zfd, NULL, 0, NULL); 1571 break; 1572 #endif 1573 1574 #ifndef NO_XZ_SUPPORT 1575 case FT_XZ: 1576 if (lflag) { 1577 size = unxz_len(fd); 1578 if (!tflag) { 1579 print_list_out(in_size, size, file); 1580 close(fd); 1581 return -1; 1582 } 1583 } else 1584 size = unxz(fd, zfd, NULL, 0, NULL); 1585 break; 1586 #endif 1587 1588 #ifndef NO_LZ_SUPPORT 1589 case FT_LZ: 1590 if (lflag) { 1591 maybe_warnx("no -l with lzip files"); 1592 goto lose; 1593 } 1594 size = unlz(fd, zfd, NULL, 0, NULL); 1595 break; 1596 #endif 1597 1598 #ifndef NO_ZSTD_SUPPORT 1599 case FT_ZSTD: 1600 if (lflag) { 1601 maybe_warnx("no -l with zstd files"); 1602 goto lose; 1603 } 1604 size = unzstd(fd, zfd, NULL, 0, NULL); 1605 break; 1606 #endif 1607 case FT_UNKNOWN: 1608 if (lflag) { 1609 maybe_warnx("no -l for unknown filetypes"); 1610 goto lose; 1611 } 1612 size = cat_fd(NULL, 0, NULL, fd); 1613 break; 1614 default: 1615 if (lflag) { 1616 print_list(fd, in_size, outfile, isb.st_mtime); 1617 if (!tflag) { 1618 close(fd); 1619 return -1; /* XXX */ 1620 } 1621 } 1622 1623 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1624 break; 1625 } 1626 1627 if (close(fd) != 0) 1628 maybe_warn("couldn't close input"); 1629 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1630 maybe_warn("couldn't close output"); 1631 1632 if (size == -1) { 1633 if (cflag == 0) 1634 unlink(outfile); 1635 maybe_warnx("%s: uncompress failed", file); 1636 return -1; 1637 } 1638 1639 /* if testing, or we uncompressed to stdout, this is all we need */ 1640 if (tflag) 1641 return size; 1642 /* if we are uncompressing to stdin, don't remove the file. */ 1643 if (cflag) 1644 return size; 1645 1646 /* 1647 * if we create a file... 1648 */ 1649 /* 1650 * if we can't stat the file don't remove the file. 1651 */ 1652 1653 ofd = open(outfile, O_RDWR, 0); 1654 if (ofd == -1) { 1655 maybe_warn("couldn't open (leaving original): %s", 1656 outfile); 1657 return -1; 1658 } 1659 if (fstat(ofd, &osb) != 0) { 1660 maybe_warn("couldn't stat (leaving original): %s", 1661 outfile); 1662 close(ofd); 1663 return -1; 1664 } 1665 if (osb.st_size != size) { 1666 maybe_warnx("stat gave different size: %ju != %ju (leaving original)", 1667 (uintmax_t)size, (uintmax_t)osb.st_size); 1668 close(ofd); 1669 unlink(outfile); 1670 return -1; 1671 } 1672 copymodes(ofd, &isb, outfile); 1673 remove_file = NULL; 1674 close(ofd); 1675 unlink_input(file, &isb); 1676 return size; 1677 1678 unexpected_EOF: 1679 maybe_warnx("%s: unexpected end of file", file); 1680 lose: 1681 if (fd != -1) 1682 close(fd); 1683 if (zfd != -1 && zfd != STDOUT_FILENO) 1684 close(zfd); 1685 return -1; 1686 } 1687 1688 static void 1689 check_siginfo(void) 1690 { 1691 if (print_info == 0) 1692 return; 1693 if (infile) { 1694 if (infile_total) { 1695 int pcent = (int)((100.0 * infile_current) / infile_total); 1696 1697 fprintf(stderr, "%s: done %llu/%llu bytes %d%%\n", 1698 infile, (unsigned long long)infile_current, 1699 (unsigned long long)infile_total, pcent); 1700 } else 1701 fprintf(stderr, "%s: done %llu bytes\n", 1702 infile, (unsigned long long)infile_current); 1703 } 1704 print_info = 0; 1705 } 1706 1707 static off_t 1708 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd) 1709 { 1710 char buf[BUFLEN]; 1711 off_t in_tot; 1712 ssize_t w; 1713 1714 in_tot = count; 1715 w = write_retry(STDOUT_FILENO, prepend, count); 1716 if (w == -1 || (size_t)w != count) { 1717 maybe_warn("write to stdout"); 1718 return -1; 1719 } 1720 for (;;) { 1721 ssize_t rv; 1722 1723 rv = read(fd, buf, sizeof buf); 1724 if (rv == 0) 1725 break; 1726 if (rv < 0) { 1727 maybe_warn("read from fd %d", fd); 1728 break; 1729 } 1730 infile_newdata(rv); 1731 1732 if (write_retry(STDOUT_FILENO, buf, rv) != rv) { 1733 maybe_warn("write to stdout"); 1734 break; 1735 } 1736 in_tot += rv; 1737 } 1738 1739 if (gsizep) 1740 *gsizep = in_tot; 1741 return (in_tot); 1742 } 1743 1744 static void 1745 handle_stdin(void) 1746 { 1747 struct stat isb; 1748 unsigned char fourbytes[4]; 1749 size_t in_size; 1750 off_t usize, gsize; 1751 enum filetype method; 1752 ssize_t bytes_read; 1753 #ifndef NO_COMPRESS_SUPPORT 1754 FILE *in; 1755 #endif 1756 1757 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1758 maybe_warnx("standard input is a terminal -- ignoring"); 1759 goto out; 1760 } 1761 1762 if (fstat(STDIN_FILENO, &isb) < 0) { 1763 maybe_warn("fstat"); 1764 goto out; 1765 } 1766 if (S_ISREG(isb.st_mode)) 1767 in_size = isb.st_size; 1768 else 1769 in_size = 0; 1770 infile_set("(stdin)", in_size); 1771 1772 if (lflag) { 1773 print_list(STDIN_FILENO, in_size, infile, isb.st_mtime); 1774 goto out; 1775 } 1776 1777 bytes_read = read_retry(STDIN_FILENO, fourbytes, sizeof fourbytes); 1778 if (bytes_read == -1) { 1779 maybe_warn("can't read stdin"); 1780 goto out; 1781 } else if (bytes_read != sizeof(fourbytes)) { 1782 maybe_warnx("(stdin): unexpected end of file"); 1783 goto out; 1784 } 1785 1786 method = file_gettype(fourbytes); 1787 switch (method) { 1788 default: 1789 if (fflag == 0) { 1790 maybe_warnx("unknown compression format"); 1791 goto out; 1792 } 1793 usize = cat_fd(fourbytes, sizeof fourbytes, &gsize, STDIN_FILENO); 1794 break; 1795 case FT_GZIP: 1796 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1797 (char *)fourbytes, sizeof fourbytes, &gsize, "(stdin)"); 1798 break; 1799 #ifndef NO_BZIP2_SUPPORT 1800 case FT_BZIP2: 1801 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1802 (char *)fourbytes, sizeof fourbytes, &gsize); 1803 break; 1804 #endif 1805 #ifndef NO_COMPRESS_SUPPORT 1806 case FT_Z: 1807 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1808 maybe_warnx("zopen of stdin"); 1809 goto out; 1810 } 1811 1812 usize = zuncompress(in, stdout, (char *)fourbytes, 1813 sizeof fourbytes, &gsize); 1814 fclose(in); 1815 break; 1816 #endif 1817 #ifndef NO_PACK_SUPPORT 1818 case FT_PACK: 1819 usize = unpack(STDIN_FILENO, STDOUT_FILENO, 1820 (char *)fourbytes, sizeof fourbytes, &gsize); 1821 break; 1822 #endif 1823 #ifndef NO_XZ_SUPPORT 1824 case FT_XZ: 1825 usize = unxz(STDIN_FILENO, STDOUT_FILENO, 1826 (char *)fourbytes, sizeof fourbytes, &gsize); 1827 break; 1828 #endif 1829 #ifndef NO_LZ_SUPPORT 1830 case FT_LZ: 1831 usize = unlz(STDIN_FILENO, STDOUT_FILENO, 1832 (char *)fourbytes, sizeof fourbytes, &gsize); 1833 break; 1834 #endif 1835 #ifndef NO_ZSTD_SUPPORT 1836 case FT_ZSTD: 1837 usize = unzstd(STDIN_FILENO, STDOUT_FILENO, 1838 (char *)fourbytes, sizeof fourbytes, &gsize); 1839 break; 1840 #endif 1841 } 1842 1843 if (vflag && !tflag && usize != -1 && gsize != -1) 1844 print_verbage(NULL, NULL, usize, gsize); 1845 if (vflag && tflag) 1846 print_test("(stdin)", usize != -1); 1847 1848 out: 1849 infile_clear(); 1850 } 1851 1852 static void 1853 handle_stdout(void) 1854 { 1855 off_t gsize; 1856 off_t usize; 1857 struct stat sb; 1858 time_t systime; 1859 uint32_t mtime; 1860 int ret; 1861 1862 infile_set("(stdout)", 0); 1863 1864 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1865 maybe_warnx("standard output is a terminal -- ignoring"); 1866 return; 1867 } 1868 1869 /* If stdin is a file use its mtime, otherwise use current time */ 1870 ret = fstat(STDIN_FILENO, &sb); 1871 if (ret < 0) { 1872 maybe_warn("Can't stat stdin"); 1873 return; 1874 } 1875 1876 if (S_ISREG(sb.st_mode)) { 1877 infile_set("(stdout)", sb.st_size); 1878 mtime = (uint32_t)sb.st_mtime; 1879 } else { 1880 systime = time(NULL); 1881 if (systime == -1) { 1882 maybe_warn("time"); 1883 return; 1884 } 1885 mtime = (uint32_t)systime; 1886 } 1887 1888 usize = 1889 gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime); 1890 if (vflag && !tflag && usize != -1 && gsize != -1) 1891 print_verbage(NULL, NULL, usize, gsize); 1892 } 1893 1894 /* do what is asked for, for the path name */ 1895 static void 1896 handle_pathname(char *path) 1897 { 1898 char *opath = path, *s = NULL; 1899 ssize_t len; 1900 int slen; 1901 struct stat sb; 1902 1903 /* check for stdout/stdin */ 1904 if (path[0] == '-' && path[1] == '\0') { 1905 if (dflag) 1906 handle_stdin(); 1907 else 1908 handle_stdout(); 1909 return; 1910 } 1911 1912 retry: 1913 if (stat(path, &sb) != 0 || (fflag == 0 && cflag == 0 && 1914 lstat(path, &sb) != 0)) { 1915 /* lets try <path>.gz if we're decompressing */ 1916 if (dflag && s == NULL && errno == ENOENT) { 1917 len = strlen(path); 1918 slen = suffixes[0].ziplen; 1919 s = malloc(len + slen + 1); 1920 if (s == NULL) 1921 maybe_err("malloc"); 1922 memcpy(s, path, len); 1923 memcpy(s + len, suffixes[0].zipped, slen + 1); 1924 path = s; 1925 goto retry; 1926 } 1927 maybe_warn("can't stat: %s", opath); 1928 goto out; 1929 } 1930 1931 if (S_ISDIR(sb.st_mode)) { 1932 if (rflag) 1933 handle_dir(path); 1934 else 1935 maybe_warnx("%s is a directory", path); 1936 goto out; 1937 } 1938 1939 if (S_ISREG(sb.st_mode)) 1940 handle_file(path, &sb); 1941 else 1942 maybe_warnx("%s is not a regular file", path); 1943 1944 out: 1945 if (s) 1946 free(s); 1947 } 1948 1949 /* compress/decompress a file */ 1950 static void 1951 handle_file(char *file, struct stat *sbp) 1952 { 1953 off_t usize, gsize; 1954 char outfile[PATH_MAX]; 1955 1956 infile_set(file, sbp->st_size); 1957 if (dflag) { 1958 usize = file_uncompress(file, outfile, sizeof(outfile)); 1959 if (vflag && tflag) 1960 print_test(file, usize != -1); 1961 if (usize == -1) 1962 return; 1963 gsize = sbp->st_size; 1964 } else { 1965 gsize = file_compress(file, outfile, sizeof(outfile)); 1966 if (gsize == -1) 1967 return; 1968 usize = sbp->st_size; 1969 } 1970 infile_clear(); 1971 1972 if (vflag && !tflag) 1973 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 1974 } 1975 1976 /* this is used with -r to recursively descend directories */ 1977 static void 1978 handle_dir(char *dir) 1979 { 1980 char *path_argv[2]; 1981 FTS *fts; 1982 FTSENT *entry; 1983 1984 path_argv[0] = dir; 1985 path_argv[1] = 0; 1986 fts = fts_open(path_argv, FTS_PHYSICAL | FTS_NOCHDIR, NULL); 1987 if (fts == NULL) { 1988 warn("couldn't fts_open %s", dir); 1989 return; 1990 } 1991 1992 while (errno = 0, (entry = fts_read(fts))) { 1993 switch(entry->fts_info) { 1994 case FTS_D: 1995 case FTS_DP: 1996 continue; 1997 1998 case FTS_DNR: 1999 case FTS_ERR: 2000 case FTS_NS: 2001 maybe_warn("%s", entry->fts_path); 2002 continue; 2003 case FTS_F: 2004 handle_file(entry->fts_path, entry->fts_statp); 2005 } 2006 } 2007 if (errno != 0) 2008 warn("error with fts_read %s", dir); 2009 (void)fts_close(fts); 2010 } 2011 2012 /* print a ratio - size reduction as a fraction of uncompressed size */ 2013 static void 2014 print_ratio(off_t in, off_t out, FILE *where) 2015 { 2016 int percent10; /* 10 * percent */ 2017 off_t diff; 2018 char buff[8]; 2019 int len; 2020 2021 diff = in - out/2; 2022 if (in == 0 && out == 0) 2023 percent10 = 0; 2024 else if (diff < 0) 2025 /* 2026 * Output is more than double size of input! print -99.9% 2027 * Quite possibly we've failed to get the original size. 2028 */ 2029 percent10 = -999; 2030 else { 2031 /* 2032 * We only need 12 bits of result from the final division, 2033 * so reduce the values until a 32bit division will suffice. 2034 */ 2035 while (in > 0x100000) { 2036 diff >>= 1; 2037 in >>= 1; 2038 } 2039 if (in != 0) 2040 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 2041 else 2042 percent10 = 0; 2043 } 2044 2045 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 2046 /* Move the '.' to before the last digit */ 2047 buff[len - 1] = buff[len - 2]; 2048 buff[len - 2] = '.'; 2049 fprintf(where, "%5s%%", buff); 2050 } 2051 2052 /* print compression statistics, and the new name (if there is one!) */ 2053 static void 2054 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 2055 { 2056 if (file) 2057 fprintf(stderr, "%s:%s ", file, 2058 strlen(file) < 7 ? "\t\t" : "\t"); 2059 print_ratio(usize, gsize, stderr); 2060 if (nfile) 2061 fprintf(stderr, " -- replaced with %s", nfile); 2062 fprintf(stderr, "\n"); 2063 fflush(stderr); 2064 } 2065 2066 /* print test results */ 2067 static void 2068 print_test(const char *file, int ok) 2069 { 2070 2071 if (exit_value == 0 && ok == 0) 2072 exit_value = 1; 2073 fprintf(stderr, "%s:%s %s\n", file, 2074 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 2075 fflush(stderr); 2076 } 2077 2078 /* print a file's info ala --list */ 2079 /* eg: 2080 compressed uncompressed ratio uncompressed_name 2081 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 2082 */ 2083 static void 2084 print_list(int fd, off_t out, const char *outfile, time_t ts) 2085 { 2086 static int first = 1; 2087 static off_t in_tot, out_tot; 2088 uint32_t crc = 0; 2089 off_t in = 0, rv; 2090 2091 if (first) { 2092 if (vflag) 2093 printf("method crc date time "); 2094 if (qflag == 0) 2095 printf(" compressed uncompressed " 2096 "ratio uncompressed_name\n"); 2097 } 2098 first = 0; 2099 2100 /* print totals? */ 2101 if (fd == -1) { 2102 in = in_tot; 2103 out = out_tot; 2104 } else 2105 { 2106 /* read the last 4 bytes - this is the uncompressed size */ 2107 rv = lseek(fd, (off_t)(-8), SEEK_END); 2108 if (rv != -1) { 2109 unsigned char buf[8]; 2110 uint32_t usize; 2111 2112 rv = read(fd, (char *)buf, sizeof(buf)); 2113 if (rv == -1) 2114 maybe_warn("read of uncompressed size"); 2115 else if (rv != sizeof(buf)) 2116 maybe_warnx("read of uncompressed size"); 2117 2118 else { 2119 usize = le32dec(&buf[4]); 2120 in = (off_t)usize; 2121 crc = le32dec(&buf[0]); 2122 } 2123 } 2124 } 2125 2126 if (vflag && fd == -1) 2127 printf(" "); 2128 else if (vflag) { 2129 char *date = ctime(&ts); 2130 2131 /* skip the day, 1/100th second, and year */ 2132 date += 4; 2133 date[12] = 0; 2134 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 2135 } 2136 in_tot += in; 2137 out_tot += out; 2138 print_list_out(out, in, outfile); 2139 } 2140 2141 static void 2142 print_list_out(off_t out, off_t in, const char *outfile) 2143 { 2144 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 2145 print_ratio(in, out, stdout); 2146 printf(" %s\n", outfile); 2147 } 2148 2149 /* display the usage of NetBSD gzip */ 2150 static void 2151 usage(void) 2152 { 2153 2154 fprintf(stderr, "%s\n", gzip_version); 2155 fprintf(stderr, 2156 "usage: %s [-123456789acdfhklLNnqrtVv] [-S .suffix] [<file> [<file> ...]]\n" 2157 " -1 --fast fastest (worst) compression\n" 2158 " -2 .. -8 set compression level\n" 2159 " -9 --best best (slowest) compression\n" 2160 " -c --stdout write to stdout, keep original files\n" 2161 " --to-stdout\n" 2162 " -d --decompress uncompress files\n" 2163 " --uncompress\n" 2164 " -f --force force overwriting & compress links\n" 2165 " -h --help display this help\n" 2166 " -k --keep don't delete input files during operation\n" 2167 " -l --list list compressed file contents\n" 2168 " -N --name save or restore original file name and time stamp\n" 2169 " -n --no-name don't save original file name or time stamp\n" 2170 " -q --quiet output no warnings\n" 2171 " -r --recursive recursively compress files in directories\n" 2172 " -S .suf use suffix .suf instead of .gz\n" 2173 " --suffix .suf\n" 2174 " -t --test test compressed file\n" 2175 " -V --version display program version\n" 2176 " -v --verbose print extra statistics\n", 2177 getprogname()); 2178 exit(0); 2179 } 2180 2181 /* display the license information of FreeBSD gzip */ 2182 static void 2183 display_license(void) 2184 { 2185 2186 fprintf(stderr, "%s (based on NetBSD gzip 20150113)\n", gzip_version); 2187 fprintf(stderr, "%s\n", gzip_copyright); 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 #ifndef NO_LZ_SUPPORT 2213 #include "unlz.c" 2214 #endif 2215 #ifndef NO_ZSTD_SUPPORT 2216 #include "unzstd.c" 2217 #endif 2218 2219 static ssize_t 2220 read_retry(int fd, void *buf, size_t sz) 2221 { 2222 char *cp = buf; 2223 size_t left = MIN(sz, (size_t) SSIZE_MAX); 2224 2225 while (left > 0) { 2226 ssize_t ret; 2227 2228 ret = read(fd, cp, left); 2229 if (ret == -1) { 2230 return ret; 2231 } else if (ret == 0) { 2232 break; /* EOF */ 2233 } 2234 cp += ret; 2235 left -= ret; 2236 } 2237 2238 return sz - left; 2239 } 2240 2241 static ssize_t 2242 write_retry(int fd, const void *buf, size_t sz) 2243 { 2244 const char *cp = buf; 2245 size_t left = MIN(sz, (size_t) SSIZE_MAX); 2246 2247 while (left > 0) { 2248 ssize_t ret; 2249 2250 ret = write(fd, cp, left); 2251 if (ret == -1) { 2252 return ret; 2253 } else if (ret == 0) { 2254 abort(); /* Can't happen */ 2255 } 2256 cp += ret; 2257 left -= ret; 2258 } 2259 2260 return sz - left; 2261 } 2262