1 /* $NetBSD: gzip.c,v 1.127 2024/06/01 10:17:12 martin Exp $ */ 2 3 /* 4 * Copyright (c) 1997-2024 Matthew R. Green 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #if HAVE_NBTOOL_CONFIG_H 30 #include "nbtool_config.h" 31 #endif 32 33 #include <sys/cdefs.h> 34 #ifndef lint 35 __COPYRIGHT("@(#) Copyright (c) 1997-2024 Matthew R. Green. " 36 "All rights reserved."); 37 __RCSID("$NetBSD: gzip.c,v 1.127 2024/06/01 10:17:12 martin Exp $"); 38 #endif /* not lint */ 39 40 /* 41 * gzip.c -- GPL free gzip using zlib. 42 * 43 * RFC 1950 covers the zlib format 44 * RFC 1951 covers the deflate format 45 * RFC 1952 covers the gzip format 46 * 47 * TODO: 48 * - use mmap where possible 49 * - handle some signals better (remove outfile?) 50 * - make bzip2/compress -v/-t/-l support work as well as possible 51 */ 52 53 #include <sys/param.h> 54 #include <sys/stat.h> 55 #include <sys/time.h> 56 57 #include <inttypes.h> 58 #include <unistd.h> 59 #include <stdio.h> 60 #include <string.h> 61 #include <stdlib.h> 62 #include <err.h> 63 #include <errno.h> 64 #include <fcntl.h> 65 #include <zlib.h> 66 #include <fts.h> 67 #include <libgen.h> 68 #include <stdarg.h> 69 #include <getopt.h> 70 #include <time.h> 71 #include <paths.h> 72 73 #ifndef PRIdOFF 74 #define PRIdOFF PRId64 75 #endif 76 77 /* what type of file are we dealing with */ 78 enum filetype { 79 FT_GZIP, 80 #ifndef NO_BZIP2_SUPPORT 81 FT_BZIP2, 82 #endif 83 #ifndef NO_COMPRESS_SUPPORT 84 FT_Z, 85 #endif 86 #ifndef NO_PACK_SUPPORT 87 FT_PACK, 88 #endif 89 #ifndef NO_XZ_SUPPORT 90 FT_XZ, 91 #endif 92 #ifndef NO_LZ_SUPPORT 93 FT_LZ, 94 #endif 95 FT_LAST, 96 FT_UNKNOWN 97 }; 98 99 #ifndef NO_BZIP2_SUPPORT 100 #include <bzlib.h> 101 102 #define BZ2_SUFFIX ".bz2" 103 #define BZIP2_MAGIC "\102\132\150" 104 #endif 105 106 #ifndef NO_COMPRESS_SUPPORT 107 #define Z_SUFFIX ".Z" 108 #define Z_MAGIC "\037\235" 109 #endif 110 111 #ifndef NO_PACK_SUPPORT 112 #define PACK_MAGIC "\037\036" 113 #endif 114 115 #ifndef NO_XZ_SUPPORT 116 #include <lzma.h> 117 #define XZ_SUFFIX ".xz" 118 #define XZ_MAGIC "\3757zXZ" 119 #endif 120 121 #ifndef NO_LZ_SUPPORT 122 #define LZ_SUFFIX ".lz" 123 #define LZ_MAGIC "LZIP" 124 #endif 125 126 #define GZ_SUFFIX ".gz" 127 128 #define BUFLEN (64 * 1024) 129 130 #define GZIP_MAGIC0 0x1F 131 #define GZIP_MAGIC1 0x8B 132 #define GZIP_OMAGIC1 0x9E 133 134 #define GZIP_TIMESTAMP (off_t)4 135 #define GZIP_ORIGNAME (off_t)10 136 137 #define HEAD_CRC 0x02 138 #define EXTRA_FIELD 0x04 139 #define ORIG_NAME 0x08 140 #define COMMENT 0x10 141 142 #define OS_CODE 3 /* Unix */ 143 144 typedef struct { 145 const char *zipped; 146 int ziplen; 147 const char *normal; /* for unzip - must not be longer than zipped */ 148 } suffixes_t; 149 static suffixes_t suffixes[] = { 150 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N} 151 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */ 152 #ifndef SMALL 153 SUFFIX(GZ_SUFFIX, ""), 154 SUFFIX(".z", ""), 155 SUFFIX("-gz", ""), 156 SUFFIX("-z", ""), 157 SUFFIX("_z", ""), 158 SUFFIX(".taz", ".tar"), 159 SUFFIX(".tgz", ".tar"), 160 #ifndef NO_BZIP2_SUPPORT 161 SUFFIX(BZ2_SUFFIX, ""), 162 #endif 163 #ifndef NO_COMPRESS_SUPPORT 164 SUFFIX(Z_SUFFIX, ""), 165 #endif 166 #ifndef NO_XZ_SUPPORT 167 SUFFIX(XZ_SUFFIX, ""), 168 #endif 169 #ifndef NO_LZ_SUPPORT 170 SUFFIX(LZ_SUFFIX, ""), 171 #endif 172 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */ 173 #endif /* SMALL */ 174 #undef SUFFIX 175 }; 176 #define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0]) 177 #define SUFFIX_MAXLEN 30 178 179 static const char gzip_version[] = "NetBSD gzip 20240203"; 180 181 static int cflag; /* stdout mode */ 182 static int dflag; /* decompress mode */ 183 static int lflag; /* list mode */ 184 static int numflag = 6; /* gzip -1..-9 value */ 185 186 #ifndef SMALL 187 static int fflag; /* force mode */ 188 static int kflag; /* don't delete input files */ 189 static int nflag; /* don't save name/timestamp */ 190 static int Nflag; /* don't restore name/timestamp */ 191 static int qflag; /* quiet mode */ 192 static int rflag; /* recursive mode */ 193 static int tflag; /* test */ 194 static int vflag; /* verbose mode */ 195 #ifdef SIGINFO 196 static sig_atomic_t print_info = 0; 197 #endif 198 #else 199 #define qflag 0 200 #define tflag 0 201 #endif 202 203 static int exit_value = 0; /* exit value */ 204 205 static const char *infile; /* name of file coming in */ 206 207 static void maybe_err(const char *fmt, ...) __printflike(1, 2) __dead; 208 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \ 209 !defined(NO_XZ_SUPPORT) 210 static void maybe_errx(const char *fmt, ...) __printflike(1, 2) __dead; 211 #endif 212 static void maybe_warn(const char *fmt, ...) __printflike(1, 2); 213 static void maybe_warnx(const char *fmt, ...) __printflike(1, 2); 214 static enum filetype file_gettype(u_char *); 215 #ifdef SMALL 216 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz) 217 #endif 218 static off_t gz_compress(int, int, off_t *, const char *, uint32_t); 219 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *); 220 static off_t file_compress(char *, char *, size_t); 221 static off_t file_uncompress(char *, char *, size_t); 222 static void handle_pathname(char *); 223 static void handle_file(char *, struct stat *); 224 static void handle_stdin(void); 225 static void handle_stdout(void); 226 static void print_ratio(off_t, off_t, FILE *); 227 static void print_list(int fd, off_t, const char *, time_t); 228 __dead static void usage(void); 229 __dead static void display_version(void); 230 static const suffixes_t *check_suffix(char *, int); 231 static ssize_t read_retry(int, void *, size_t); 232 static ssize_t write_retry(int, const void *, size_t); 233 static void print_list_out(off_t, off_t, const char*); 234 235 #ifdef SMALL 236 #define infile_set(f,t) infile_set(f) 237 #endif 238 static void infile_set(const char *newinfile, off_t total); 239 240 #ifdef SMALL 241 #define unlink_input(f, sb) unlink(f) 242 #define check_siginfo() /* nothing */ 243 #define setup_signals() /* nothing */ 244 #define infile_newdata(t) /* nothing */ 245 #else 246 static off_t infile_total; /* total expected to read/write */ 247 static off_t infile_current; /* current read/write */ 248 249 #ifdef SIGINFO 250 static void check_siginfo(void); 251 #else 252 #define check_siginfo() /* nothing */ 253 #endif 254 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd); 255 static void prepend_gzip(char *, int *, char ***); 256 static void handle_dir(char *); 257 static void print_verbage(const char *, const char *, off_t, off_t); 258 static void print_test(const char *, int); 259 static void copymodes(int fd, const struct stat *, const char *file); 260 static int check_outfile(const char *outfile); 261 static void setup_signals(void); 262 static void infile_newdata(size_t newdata); 263 static void infile_clear(void); 264 #endif 265 266 #ifndef NO_BZIP2_SUPPORT 267 static off_t unbzip2(int, int, char *, size_t, off_t *); 268 #endif 269 270 #ifndef NO_COMPRESS_SUPPORT 271 static FILE *zdopen(int); 272 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *); 273 #endif 274 275 #ifndef NO_PACK_SUPPORT 276 static off_t unpack(int, int, char *, size_t, off_t *); 277 #endif 278 279 #ifndef NO_XZ_SUPPORT 280 static off_t unxz(int, int, char *, size_t, off_t *); 281 static off_t unxz_len(int); 282 #endif 283 284 #ifndef NO_LZ_SUPPORT 285 static off_t unlz(int, int, char *, size_t, off_t *); 286 #endif 287 288 #ifdef SMALL 289 #define getopt_long(a,b,c,d,e) getopt(a,b,c) 290 #else 291 static const struct option longopts[] = { 292 { "stdout", no_argument, 0, 'c' }, 293 { "to-stdout", no_argument, 0, 'c' }, 294 { "decompress", no_argument, 0, 'd' }, 295 { "uncompress", no_argument, 0, 'd' }, 296 { "force", no_argument, 0, 'f' }, 297 { "help", no_argument, 0, 'h' }, 298 { "keep", no_argument, 0, 'k' }, 299 { "list", no_argument, 0, 'l' }, 300 { "no-name", no_argument, 0, 'n' }, 301 { "name", no_argument, 0, 'N' }, 302 { "quiet", no_argument, 0, 'q' }, 303 { "recursive", no_argument, 0, 'r' }, 304 { "suffix", required_argument, 0, 'S' }, 305 { "test", no_argument, 0, 't' }, 306 { "verbose", no_argument, 0, 'v' }, 307 { "version", no_argument, 0, 'V' }, 308 { "fast", no_argument, 0, '1' }, 309 { "best", no_argument, 0, '9' }, 310 #if 0 311 /* 312 * This is what else GNU gzip implements. --ascii isn't useful 313 * on NetBSD, and I don't care to have a --license. 314 */ 315 { "ascii", no_argument, 0, 'a' }, 316 { "license", no_argument, 0, 'L' }, 317 #endif 318 { NULL, no_argument, 0, 0 }, 319 }; 320 #endif 321 322 int 323 main(int argc, char **argv) 324 { 325 const char *progname = getprogname(); 326 #ifndef SMALL 327 char *gzip; 328 int len; 329 #endif 330 int ch; 331 332 setup_signals(); 333 334 #ifndef SMALL 335 if ((gzip = getenv("GZIP")) != NULL) 336 prepend_gzip(gzip, &argc, &argv); 337 #endif 338 339 /* 340 * XXX 341 * handle being called `gunzip', `zcat' and `gzcat' 342 */ 343 if (strcmp(progname, "gunzip") == 0) 344 dflag = 1; 345 else if (strcmp(progname, "zcat") == 0 || 346 strcmp(progname, "gzcat") == 0) 347 dflag = cflag = 1; 348 349 #ifdef SMALL 350 #define OPT_LIST "123456789cdhlVn" 351 #else 352 #define OPT_LIST "123456789cdfhklNnqrS:tVv" 353 #endif 354 355 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) { 356 switch (ch) { 357 case '1': case '2': case '3': 358 case '4': case '5': case '6': 359 case '7': case '8': case '9': 360 numflag = ch - '0'; 361 break; 362 case 'c': 363 cflag = 1; 364 break; 365 case 'd': 366 dflag = 1; 367 break; 368 case 'l': 369 lflag = 1; 370 dflag = 1; 371 break; 372 case 'V': 373 display_version(); 374 /* NOTREACHED */ 375 #ifndef SMALL 376 case 'f': 377 fflag = 1; 378 break; 379 case 'k': 380 kflag = 1; 381 break; 382 case 'N': 383 nflag = 0; 384 Nflag = 1; 385 break; 386 case 'n': 387 nflag = 1; 388 Nflag = 0; 389 break; 390 case 'q': 391 qflag = 1; 392 break; 393 case 'r': 394 rflag = 1; 395 break; 396 case 'S': 397 len = strlen(optarg); 398 if (len != 0) { 399 if (len > SUFFIX_MAXLEN) 400 errx(1, "incorrect suffix: '%s'", optarg); 401 suffixes[0].zipped = optarg; 402 suffixes[0].ziplen = len; 403 } else { 404 suffixes[NUM_SUFFIXES - 1].zipped = ""; 405 suffixes[NUM_SUFFIXES - 1].ziplen = 0; 406 } 407 break; 408 case 't': 409 cflag = 1; 410 tflag = 1; 411 dflag = 1; 412 break; 413 case 'v': 414 vflag = 1; 415 break; 416 #else 417 case 'n': 418 break; 419 #endif 420 default: 421 usage(); 422 /* NOTREACHED */ 423 } 424 } 425 argv += optind; 426 argc -= optind; 427 428 if (argc == 0) { 429 if (dflag) /* stdin mode */ 430 handle_stdin(); 431 else /* stdout mode */ 432 handle_stdout(); 433 } else { 434 do { 435 handle_pathname(argv[0]); 436 } while (*++argv); 437 } 438 #ifndef SMALL 439 if (qflag == 0 && lflag && argc > 1) 440 print_list(-1, 0, "(totals)", 0); 441 #endif 442 exit(exit_value); 443 } 444 445 /* maybe print a warning */ 446 void 447 maybe_warn(const char *fmt, ...) 448 { 449 va_list ap; 450 451 if (qflag == 0) { 452 va_start(ap, fmt); 453 vwarn(fmt, ap); 454 va_end(ap); 455 } 456 if (exit_value == 0) 457 exit_value = 1; 458 } 459 460 /* ... without an errno. */ 461 void 462 maybe_warnx(const char *fmt, ...) 463 { 464 va_list ap; 465 466 if (qflag == 0) { 467 va_start(ap, fmt); 468 vwarnx(fmt, ap); 469 va_end(ap); 470 } 471 if (exit_value == 0) 472 exit_value = 1; 473 } 474 475 /* maybe print an error */ 476 void 477 maybe_err(const char *fmt, ...) 478 { 479 va_list ap; 480 481 if (qflag == 0) { 482 va_start(ap, fmt); 483 vwarn(fmt, ap); 484 va_end(ap); 485 } 486 exit(2); 487 } 488 489 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \ 490 !defined(NO_XZ_SUPPORT) 491 /* ... without an errno. */ 492 void 493 maybe_errx(const char *fmt, ...) 494 { 495 va_list ap; 496 497 if (qflag == 0) { 498 va_start(ap, fmt); 499 vwarnx(fmt, ap); 500 va_end(ap); 501 } 502 exit(2); 503 } 504 #endif 505 506 #ifndef SMALL 507 /* split up $GZIP and prepend it to the argument list */ 508 static void 509 prepend_gzip(char *gzip, int *argc, char ***argv) 510 { 511 char *s, **nargv, **ac; 512 int nenvarg = 0, i; 513 514 /* scan how many arguments there are */ 515 for (s = gzip;;) { 516 while (*s == ' ' || *s == '\t') 517 s++; 518 if (*s == 0) 519 goto count_done; 520 nenvarg++; 521 while (*s != ' ' && *s != '\t') 522 if (*s++ == 0) 523 goto count_done; 524 } 525 count_done: 526 /* punt early */ 527 if (nenvarg == 0) 528 return; 529 530 *argc += nenvarg; 531 ac = *argv; 532 533 nargv = (char **)malloc((*argc + 1) * sizeof(char *)); 534 if (nargv == NULL) 535 maybe_err("malloc"); 536 537 /* stash this away */ 538 *argv = nargv; 539 540 /* copy the program name first */ 541 i = 0; 542 nargv[i++] = *(ac++); 543 544 /* take a copy of $GZIP and add it to the array */ 545 s = strdup(gzip); 546 if (s == NULL) 547 maybe_err("strdup"); 548 for (;;) { 549 /* Skip whitespaces. */ 550 while (*s == ' ' || *s == '\t') 551 s++; 552 if (*s == 0) 553 goto copy_done; 554 nargv[i++] = s; 555 /* Find the end of this argument. */ 556 while (*s != ' ' && *s != '\t') 557 if (*s++ == 0) 558 /* Argument followed by NUL. */ 559 goto copy_done; 560 /* Terminate by overwriting ' ' or '\t' with NUL. */ 561 *s++ = 0; 562 } 563 copy_done: 564 565 /* copy the original arguments and a NULL */ 566 while (*ac) 567 nargv[i++] = *(ac++); 568 nargv[i] = NULL; 569 } 570 #endif 571 572 /* compress input to output. Return bytes read, -1 on error */ 573 static off_t 574 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime) 575 { 576 z_stream z; 577 char *outbufp, *inbufp; 578 off_t in_tot = 0, out_tot = 0; 579 ssize_t in_size; 580 int i, error; 581 uLong crc; 582 #ifdef SMALL 583 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0, 584 0, 0, 0, 0, 585 0, OS_CODE }; 586 #endif 587 588 outbufp = malloc(BUFLEN); 589 inbufp = malloc(BUFLEN); 590 if (outbufp == NULL || inbufp == NULL) { 591 maybe_err("malloc failed"); 592 goto out; 593 } 594 595 memset(&z, 0, sizeof z); 596 z.zalloc = Z_NULL; 597 z.zfree = Z_NULL; 598 z.opaque = 0; 599 600 #ifdef SMALL 601 memcpy(outbufp, header, sizeof header); 602 i = sizeof header; 603 #else 604 if (nflag != 0) { 605 mtime = 0; 606 origname = ""; 607 } 608 609 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s", 610 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 611 *origname ? ORIG_NAME : 0, 612 mtime & 0xff, 613 (mtime >> 8) & 0xff, 614 (mtime >> 16) & 0xff, 615 (mtime >> 24) & 0xff, 616 numflag == 1 ? 4 : numflag == 9 ? 2 : 0, 617 OS_CODE, origname); 618 if (i >= BUFLEN) 619 /* this need PATH_MAX > BUFLEN ... */ 620 maybe_err("snprintf"); 621 if (*origname) 622 i++; 623 #endif 624 625 z.next_out = (unsigned char *)outbufp + i; 626 z.avail_out = BUFLEN - i; 627 628 error = deflateInit2(&z, numflag, Z_DEFLATED, 629 (-MAX_WBITS), 8, Z_DEFAULT_STRATEGY); 630 if (error != Z_OK) { 631 maybe_warnx("deflateInit2 failed"); 632 in_tot = -1; 633 goto out; 634 } 635 636 crc = crc32(0L, Z_NULL, 0); 637 for (;;) { 638 check_siginfo(); 639 if (z.avail_out == 0) { 640 if (write_retry(out, outbufp, BUFLEN) != BUFLEN) { 641 maybe_warn("write"); 642 out_tot = -1; 643 goto out; 644 } 645 646 out_tot += BUFLEN; 647 z.next_out = (unsigned char *)outbufp; 648 z.avail_out = BUFLEN; 649 } 650 651 if (z.avail_in == 0) { 652 in_size = read(in, inbufp, BUFLEN); 653 if (in_size < 0) { 654 maybe_warn("read"); 655 in_tot = -1; 656 goto out; 657 } 658 if (in_size == 0) 659 break; 660 infile_newdata(in_size); 661 662 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size); 663 in_tot += in_size; 664 z.next_in = (unsigned char *)inbufp; 665 z.avail_in = in_size; 666 } 667 668 error = deflate(&z, Z_NO_FLUSH); 669 if (error != Z_OK && error != Z_STREAM_END) { 670 maybe_warnx("deflate failed"); 671 in_tot = -1; 672 goto out; 673 } 674 } 675 676 /* clean up */ 677 for (;;) { 678 size_t len; 679 ssize_t w; 680 681 error = deflate(&z, Z_FINISH); 682 if (error != Z_OK && error != Z_STREAM_END) { 683 maybe_warnx("deflate failed"); 684 in_tot = -1; 685 goto out; 686 } 687 688 len = (char *)z.next_out - outbufp; 689 690 w = write_retry(out, outbufp, len); 691 if (w == -1 || (size_t)w != len) { 692 maybe_warn("write"); 693 out_tot = -1; 694 goto out; 695 } 696 out_tot += len; 697 z.next_out = (unsigned char *)outbufp; 698 z.avail_out = BUFLEN; 699 700 if (error == Z_STREAM_END) 701 break; 702 } 703 704 if (deflateEnd(&z) != Z_OK) { 705 maybe_warnx("deflateEnd failed"); 706 in_tot = -1; 707 goto out; 708 } 709 710 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c", 711 (int)crc & 0xff, 712 (int)(crc >> 8) & 0xff, 713 (int)(crc >> 16) & 0xff, 714 (int)(crc >> 24) & 0xff, 715 (int)in_tot & 0xff, 716 (int)(in_tot >> 8) & 0xff, 717 (int)(in_tot >> 16) & 0xff, 718 (int)(in_tot >> 24) & 0xff); 719 if (i != 8) 720 maybe_err("snprintf"); 721 #if 0 722 if (in_tot > 0xffffffff) 723 maybe_warn("input file size >= 4GB cannot be saved"); 724 #endif 725 if (write_retry(out, outbufp, i) != i) { 726 maybe_warn("write"); 727 in_tot = -1; 728 } else 729 out_tot += i; 730 731 out: 732 if (inbufp != NULL) 733 free(inbufp); 734 if (outbufp != NULL) 735 free(outbufp); 736 if (gsizep) 737 *gsizep = out_tot; 738 return in_tot; 739 } 740 741 /* 742 * uncompress input to output then close the input. return the 743 * uncompressed size written, and put the compressed sized read 744 * into `*gsizep'. 745 */ 746 static off_t 747 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep, 748 const char *filename) 749 { 750 z_stream z; 751 char *outbufp, *inbufp; 752 off_t out_tot = -1, in_tot = 0; 753 uint32_t out_sub_tot = 0; 754 enum { 755 GZSTATE_MAGIC0, 756 GZSTATE_MAGIC1, 757 GZSTATE_METHOD, 758 GZSTATE_FLAGS, 759 GZSTATE_SKIPPING, 760 GZSTATE_EXTRA, 761 GZSTATE_EXTRA2, 762 GZSTATE_EXTRA3, 763 GZSTATE_ORIGNAME, 764 GZSTATE_COMMENT, 765 GZSTATE_HEAD_CRC1, 766 GZSTATE_HEAD_CRC2, 767 GZSTATE_INIT, 768 GZSTATE_READ, 769 GZSTATE_CRC, 770 GZSTATE_LEN, 771 } state = GZSTATE_MAGIC0; 772 int flags = 0, skip_count = 0; 773 int error = Z_STREAM_ERROR, done_reading = 0; 774 uLong crc = 0; 775 ssize_t wr; 776 int needmore = 0; 777 778 #define ADVANCE() { z.next_in++; z.avail_in--; } 779 780 if ((outbufp = malloc(BUFLEN)) == NULL) { 781 maybe_err("malloc failed"); 782 goto out2; 783 } 784 if ((inbufp = malloc(BUFLEN)) == NULL) { 785 maybe_err("malloc failed"); 786 goto out1; 787 } 788 789 memset(&z, 0, sizeof z); 790 z.avail_in = prelen; 791 z.next_in = (unsigned char *)pre; 792 z.avail_out = BUFLEN; 793 z.next_out = (unsigned char *)outbufp; 794 z.zalloc = NULL; 795 z.zfree = NULL; 796 z.opaque = 0; 797 798 in_tot = prelen; 799 out_tot = 0; 800 801 for (;;) { 802 check_siginfo(); 803 if ((z.avail_in == 0 || needmore) && done_reading == 0) { 804 ssize_t in_size; 805 806 if (z.avail_in > 0) { 807 memmove(inbufp, z.next_in, z.avail_in); 808 } 809 z.next_in = (unsigned char *)inbufp; 810 in_size = read(in, z.next_in + z.avail_in, 811 BUFLEN - z.avail_in); 812 813 if (in_size == -1) { 814 maybe_warn("failed to read stdin"); 815 goto stop_and_fail; 816 } else if (in_size == 0) { 817 done_reading = 1; 818 } 819 infile_newdata(in_size); 820 821 z.avail_in += in_size; 822 needmore = 0; 823 824 in_tot += in_size; 825 } 826 if (z.avail_in == 0) { 827 if (done_reading && state != GZSTATE_MAGIC0) { 828 maybe_warnx("%s: unexpected end of file", 829 filename); 830 goto stop_and_fail; 831 } 832 goto stop; 833 } 834 switch (state) { 835 case GZSTATE_MAGIC0: 836 if (*z.next_in != GZIP_MAGIC0) { 837 if (in_tot > 0) { 838 maybe_warnx("%s: trailing garbage " 839 "ignored", filename); 840 goto stop; 841 } 842 maybe_warnx("input not gziped (MAGIC0)"); 843 exit_value = 2; 844 goto stop_and_fail; 845 } 846 ADVANCE(); 847 state++; 848 out_sub_tot = 0; 849 crc = crc32(0L, Z_NULL, 0); 850 break; 851 852 case GZSTATE_MAGIC1: 853 if (*z.next_in != GZIP_MAGIC1 && 854 *z.next_in != GZIP_OMAGIC1) { 855 maybe_warnx("input not gziped (MAGIC1)"); 856 goto stop_and_fail; 857 } 858 ADVANCE(); 859 state++; 860 break; 861 862 case GZSTATE_METHOD: 863 if (*z.next_in != Z_DEFLATED) { 864 maybe_warnx("unknown compression method"); 865 goto stop_and_fail; 866 } 867 ADVANCE(); 868 state++; 869 break; 870 871 case GZSTATE_FLAGS: 872 flags = *z.next_in; 873 ADVANCE(); 874 skip_count = 6; 875 state++; 876 break; 877 878 case GZSTATE_SKIPPING: 879 if (skip_count > 0) { 880 skip_count--; 881 ADVANCE(); 882 } else 883 state++; 884 break; 885 886 case GZSTATE_EXTRA: 887 if ((flags & EXTRA_FIELD) == 0) { 888 state = GZSTATE_ORIGNAME; 889 break; 890 } 891 skip_count = *z.next_in; 892 ADVANCE(); 893 state++; 894 break; 895 896 case GZSTATE_EXTRA2: 897 skip_count |= ((*z.next_in) << 8); 898 ADVANCE(); 899 state++; 900 break; 901 902 case GZSTATE_EXTRA3: 903 if (skip_count > 0) { 904 skip_count--; 905 ADVANCE(); 906 } else 907 state++; 908 break; 909 910 case GZSTATE_ORIGNAME: 911 if ((flags & ORIG_NAME) == 0) { 912 state++; 913 break; 914 } 915 if (*z.next_in == 0) 916 state++; 917 ADVANCE(); 918 break; 919 920 case GZSTATE_COMMENT: 921 if ((flags & COMMENT) == 0) { 922 state++; 923 break; 924 } 925 if (*z.next_in == 0) 926 state++; 927 ADVANCE(); 928 break; 929 930 case GZSTATE_HEAD_CRC1: 931 if (flags & HEAD_CRC) 932 skip_count = 2; 933 else 934 skip_count = 0; 935 state++; 936 break; 937 938 case GZSTATE_HEAD_CRC2: 939 if (skip_count > 0) { 940 skip_count--; 941 ADVANCE(); 942 } else 943 state++; 944 break; 945 946 case GZSTATE_INIT: 947 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) { 948 maybe_warnx("failed to inflateInit"); 949 goto stop_and_fail; 950 } 951 state++; 952 break; 953 954 case GZSTATE_READ: 955 error = inflate(&z, Z_FINISH); 956 switch (error) { 957 /* Z_BUF_ERROR goes with Z_FINISH... */ 958 case Z_BUF_ERROR: 959 if (z.avail_out > 0 && !done_reading) 960 continue; 961 962 case Z_STREAM_END: 963 case Z_OK: 964 break; 965 966 case Z_NEED_DICT: 967 maybe_warnx("Z_NEED_DICT error"); 968 goto stop_and_fail; 969 case Z_DATA_ERROR: 970 maybe_warnx("data stream error"); 971 goto stop_and_fail; 972 case Z_STREAM_ERROR: 973 maybe_warnx("internal stream error"); 974 goto stop_and_fail; 975 case Z_MEM_ERROR: 976 maybe_warnx("memory allocation error"); 977 goto stop_and_fail; 978 979 default: 980 maybe_warn("unknown error from inflate(): %d", 981 error); 982 } 983 wr = BUFLEN - z.avail_out; 984 985 if (wr != 0) { 986 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 987 if ( 988 #ifndef SMALL 989 /* don't write anything with -t */ 990 tflag == 0 && 991 #endif 992 write_retry(out, outbufp, wr) != wr) { 993 maybe_warn("error writing to output"); 994 goto stop_and_fail; 995 } 996 997 out_tot += wr; 998 out_sub_tot += wr; 999 } 1000 1001 if (error == Z_STREAM_END) { 1002 inflateEnd(&z); 1003 state++; 1004 } 1005 1006 z.next_out = (unsigned char *)outbufp; 1007 z.avail_out = BUFLEN; 1008 1009 break; 1010 case GZSTATE_CRC: 1011 { 1012 uLong origcrc; 1013 1014 if (z.avail_in < 4) { 1015 if (!done_reading) { 1016 needmore = 1; 1017 continue; 1018 } 1019 maybe_warnx("truncated input"); 1020 goto stop_and_fail; 1021 } 1022 origcrc = ((unsigned)z.next_in[0] & 0xff) | 1023 ((unsigned)z.next_in[1] & 0xff) << 8 | 1024 ((unsigned)z.next_in[2] & 0xff) << 16 | 1025 ((unsigned)z.next_in[3] & 0xff) << 24; 1026 if (origcrc != crc) { 1027 maybe_warnx("invalid compressed" 1028 " data--crc error"); 1029 goto stop_and_fail; 1030 } 1031 } 1032 1033 z.avail_in -= 4; 1034 z.next_in += 4; 1035 1036 if (!z.avail_in && done_reading) { 1037 goto stop; 1038 } 1039 state++; 1040 break; 1041 case GZSTATE_LEN: 1042 { 1043 uLong origlen; 1044 1045 if (z.avail_in < 4) { 1046 if (!done_reading) { 1047 needmore = 1; 1048 continue; 1049 } 1050 maybe_warnx("truncated input"); 1051 goto stop_and_fail; 1052 } 1053 origlen = ((unsigned)z.next_in[0] & 0xff) | 1054 ((unsigned)z.next_in[1] & 0xff) << 8 | 1055 ((unsigned)z.next_in[2] & 0xff) << 16 | 1056 ((unsigned)z.next_in[3] & 0xff) << 24; 1057 1058 if (origlen != out_sub_tot) { 1059 maybe_warnx("invalid compressed" 1060 " data--length error"); 1061 goto stop_and_fail; 1062 } 1063 } 1064 1065 z.avail_in -= 4; 1066 z.next_in += 4; 1067 1068 if (error < 0) { 1069 maybe_warnx("decompression error"); 1070 goto stop_and_fail; 1071 } 1072 state = GZSTATE_MAGIC0; 1073 break; 1074 } 1075 continue; 1076 stop_and_fail: 1077 out_tot = -1; 1078 stop: 1079 break; 1080 } 1081 if (state > GZSTATE_INIT) 1082 inflateEnd(&z); 1083 1084 free(inbufp); 1085 out1: 1086 free(outbufp); 1087 out2: 1088 if (gsizep) 1089 *gsizep = in_tot; 1090 return (out_tot); 1091 } 1092 1093 #ifndef SMALL 1094 /* 1095 * set the owner, mode, flags & utimes using the given file descriptor. 1096 * file is only used in possible warning messages. 1097 */ 1098 static void 1099 copymodes(int fd, const struct stat *sbp, const char *file) 1100 { 1101 struct timeval times[2]; 1102 struct stat sb; 1103 1104 /* 1105 * If we have no info on the input, give this file some 1106 * default values and return.. 1107 */ 1108 if (sbp == NULL) { 1109 mode_t mask = umask(022); 1110 1111 (void)fchmod(fd, DEFFILEMODE & ~mask); 1112 (void)umask(mask); 1113 return; 1114 } 1115 sb = *sbp; 1116 1117 /* if the chown fails, remove set-id bits as-per compress(1) */ 1118 if (fchown(fd, sb.st_uid, sb.st_gid) < 0) { 1119 if (errno != EPERM) 1120 maybe_warn("couldn't fchown: %s", file); 1121 sb.st_mode &= ~(S_ISUID|S_ISGID); 1122 } 1123 1124 /* we only allow set-id and the 9 normal permission bits */ 1125 sb.st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1126 if (fchmod(fd, sb.st_mode) < 0) 1127 maybe_warn("couldn't fchmod: %s", file); 1128 1129 #if !HAVE_NBTOOL_CONFIG_H 1130 TIMESPEC_TO_TIMEVAL(×[0], &sb.st_atimespec); 1131 TIMESPEC_TO_TIMEVAL(×[1], &sb.st_mtimespec); 1132 if (futimes(fd, times) < 0) 1133 maybe_warn("couldn't utimes: %s", file); 1134 1135 /* finally, only try flags if they exist already */ 1136 if (sb.st_flags != 0 && fchflags(fd, sb.st_flags) < 0) 1137 maybe_warn("couldn't fchflags: %s", file); 1138 #endif 1139 } 1140 #endif 1141 1142 /* what sort of file is this? */ 1143 static enum filetype 1144 file_gettype(u_char *buf) 1145 { 1146 1147 if (buf[0] == GZIP_MAGIC0 && 1148 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1149 return FT_GZIP; 1150 else 1151 #ifndef NO_BZIP2_SUPPORT 1152 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1153 buf[3] >= '0' && buf[3] <= '9') 1154 return FT_BZIP2; 1155 else 1156 #endif 1157 #ifndef NO_COMPRESS_SUPPORT 1158 if (memcmp(buf, Z_MAGIC, 2) == 0) 1159 return FT_Z; 1160 else 1161 #endif 1162 #ifndef NO_PACK_SUPPORT 1163 if (memcmp(buf, PACK_MAGIC, 2) == 0) 1164 return FT_PACK; 1165 else 1166 #endif 1167 #ifndef NO_XZ_SUPPORT 1168 if (memcmp(buf, XZ_MAGIC, 4) == 0) /* XXX: We only have 4 bytes */ 1169 return FT_XZ; 1170 else 1171 #endif 1172 #ifndef NO_LZ_SUPPORT 1173 if (memcmp(buf, LZ_MAGIC, 4) == 0) 1174 return FT_LZ; 1175 else 1176 #endif 1177 return FT_UNKNOWN; 1178 } 1179 1180 #ifndef SMALL 1181 /* check the outfile is OK. */ 1182 static int 1183 check_outfile(const char *outfile) 1184 { 1185 struct stat sb; 1186 int ok = 1; 1187 1188 if (lflag == 0 && stat(outfile, &sb) == 0) { 1189 if (fflag) 1190 unlink(outfile); 1191 else if (isatty(STDIN_FILENO)) { 1192 char ans[10] = { 'n', '\0' }; /* default */ 1193 1194 fprintf(stderr, "%s already exists -- do you wish to " 1195 "overwrite (y or n)? " , outfile); 1196 (void)fgets(ans, sizeof(ans) - 1, stdin); 1197 if (ans[0] != 'y' && ans[0] != 'Y') { 1198 fprintf(stderr, "\tnot overwriting\n"); 1199 ok = 0; 1200 } else 1201 unlink(outfile); 1202 } else { 1203 maybe_warnx("%s already exists -- skipping", outfile); 1204 ok = 0; 1205 } 1206 } 1207 return ok; 1208 } 1209 1210 static void 1211 unlink_input(const char *file, const struct stat *sb) 1212 { 1213 struct stat nsb; 1214 1215 if (kflag) 1216 return; 1217 if (stat(file, &nsb) != 0) 1218 /* Must be gone already */ 1219 return; 1220 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1221 /* Definitely a different file */ 1222 return; 1223 unlink(file); 1224 } 1225 1226 #ifdef SIGINFO 1227 static void 1228 got_siginfo(int signo) 1229 { 1230 1231 print_info = 1; 1232 } 1233 #endif 1234 1235 static void 1236 setup_signals(void) 1237 { 1238 1239 #ifdef SIGINFO 1240 signal(SIGINFO, got_siginfo); 1241 #endif 1242 } 1243 1244 static void 1245 infile_newdata(size_t newdata) 1246 { 1247 1248 infile_current += newdata; 1249 } 1250 #endif 1251 1252 static void 1253 infile_set(const char *newinfile, off_t total) 1254 { 1255 1256 if (newinfile) 1257 infile = newinfile; 1258 #ifndef SMALL 1259 infile_total = total; 1260 #endif 1261 } 1262 1263 static void 1264 infile_clear(void) 1265 { 1266 1267 infile = NULL; 1268 #ifndef SMALL 1269 infile_total = infile_current = 0; 1270 #endif 1271 } 1272 1273 static const suffixes_t * 1274 check_suffix(char *file, int xlate) 1275 { 1276 const suffixes_t *s; 1277 int len = strlen(file); 1278 char *sp; 1279 1280 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1281 /* if it doesn't fit in "a.suf", don't bother */ 1282 if (s->ziplen >= len) 1283 continue; 1284 sp = file + len - s->ziplen; 1285 if (strcmp(s->zipped, sp) != 0) 1286 continue; 1287 if (xlate) 1288 strcpy(sp, s->normal); 1289 return s; 1290 } 1291 return NULL; 1292 } 1293 1294 /* 1295 * compress the given file: create a corresponding .gz file and remove the 1296 * original. 1297 */ 1298 static off_t 1299 file_compress(char *file, char *outfile, size_t outsize) 1300 { 1301 int in; 1302 int out; 1303 off_t size, in_size; 1304 #ifndef SMALL 1305 struct stat isb, osb; 1306 const suffixes_t *suff; 1307 #endif 1308 1309 in = open(file, O_RDONLY); 1310 if (in == -1) { 1311 maybe_warn("can't open %s", file); 1312 return -1; 1313 } 1314 1315 #ifndef SMALL 1316 if (fstat(in, &isb) != 0) { 1317 close(in); 1318 maybe_warn("can't stat %s", file); 1319 return -1; 1320 } 1321 infile_set(file, isb.st_size); 1322 #endif 1323 1324 if (cflag == 0) { 1325 #ifndef SMALL 1326 if (isb.st_nlink > 1 && fflag == 0) { 1327 maybe_warnx("%s has %d other link%s -- " 1328 "skipping", file, isb.st_nlink - 1, 1329 isb.st_nlink == 1 ? "" : "s"); 1330 close(in); 1331 return -1; 1332 } 1333 1334 if (fflag == 0 && (suff = check_suffix(file, 0)) 1335 && suff->zipped[0] != 0) { 1336 maybe_warnx("%s already has %s suffix -- unchanged", 1337 file, suff->zipped); 1338 close(in); 1339 return -1; 1340 } 1341 #endif 1342 1343 /* Add (usually) .gz to filename */ 1344 if ((size_t)snprintf(outfile, outsize, "%s%s", 1345 file, suffixes[0].zipped) >= outsize) 1346 memcpy(outfile + outsize - suffixes[0].ziplen - 1, 1347 suffixes[0].zipped, suffixes[0].ziplen + 1); 1348 1349 #ifndef SMALL 1350 if (check_outfile(outfile) == 0) { 1351 close(in); 1352 return -1; 1353 } 1354 #endif 1355 } 1356 1357 if (cflag == 0) { 1358 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600); 1359 if (out == -1) { 1360 maybe_warn("could not create output: %s", outfile); 1361 fclose(stdin); 1362 return -1; 1363 } 1364 } else 1365 out = STDOUT_FILENO; 1366 1367 in_size = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1368 1369 (void)close(in); 1370 1371 /* 1372 * If there was an error, in_size will be -1. 1373 * If we compressed to stdout, just return the size. 1374 * Otherwise stat the file and check it is the correct size. 1375 * We only blow away the file if we can stat the output and it 1376 * has the expected size. 1377 */ 1378 if (cflag != 0) 1379 return in_size == -1 ? -1 : size; 1380 1381 #ifndef SMALL 1382 if (fstat(out, &osb) != 0) { 1383 maybe_warn("couldn't stat: %s", outfile); 1384 goto bad_outfile; 1385 } 1386 1387 if (osb.st_size != size) { 1388 maybe_warnx("output file: %s wrong size (%" PRIdOFF 1389 " != %" PRIdOFF "), deleting", 1390 outfile, osb.st_size, size); 1391 goto bad_outfile; 1392 } 1393 1394 copymodes(out, &isb, outfile); 1395 #endif 1396 if (close(out) == -1) 1397 maybe_warn("couldn't close output"); 1398 1399 /* output is good, ok to delete input */ 1400 unlink_input(file, &isb); 1401 return size; 1402 1403 #ifndef SMALL 1404 bad_outfile: 1405 if (close(out) == -1) 1406 maybe_warn("couldn't close output"); 1407 1408 maybe_warnx("leaving original %s", file); 1409 unlink(outfile); 1410 return size; 1411 #endif 1412 } 1413 1414 /* uncompress the given file and remove the original */ 1415 static off_t 1416 file_uncompress(char *file, char *outfile, size_t outsize) 1417 { 1418 struct stat isb, osb; 1419 off_t size; 1420 ssize_t rbytes; 1421 unsigned char fourbytes[4]; 1422 enum filetype method; 1423 int fd, ofd, zfd = -1; 1424 size_t in_size; 1425 #ifndef SMALL 1426 ssize_t rv; 1427 time_t timestamp = 0; 1428 char name[PATH_MAX + 1]; 1429 #endif 1430 1431 /* gather the old name info */ 1432 1433 fd = open(file, O_RDONLY); 1434 if (fd < 0) { 1435 maybe_warn("can't open %s", file); 1436 goto lose; 1437 } 1438 if (fstat(fd, &isb) != 0) { 1439 close(fd); 1440 maybe_warn("can't stat %s", file); 1441 goto lose; 1442 } 1443 if (S_ISREG(isb.st_mode)) 1444 in_size = isb.st_size; 1445 else 1446 in_size = 0; 1447 infile_set(file, in_size); 1448 1449 strlcpy(outfile, file, outsize); 1450 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1451 maybe_warnx("%s: unknown suffix -- ignored", file); 1452 goto lose; 1453 } 1454 1455 rbytes = read(fd, fourbytes, sizeof fourbytes); 1456 if (rbytes != sizeof fourbytes) { 1457 /* we don't want to fail here. */ 1458 #ifndef SMALL 1459 if (fflag) 1460 goto lose; 1461 #endif 1462 if (rbytes == -1) 1463 maybe_warn("can't read %s", file); 1464 else 1465 goto unexpected_EOF; 1466 goto lose; 1467 } 1468 infile_newdata(rbytes); 1469 1470 method = file_gettype(fourbytes); 1471 #ifndef SMALL 1472 if (fflag == 0 && method == FT_UNKNOWN) { 1473 maybe_warnx("%s: not in gzip format", file); 1474 goto lose; 1475 } 1476 1477 #endif 1478 1479 #ifndef SMALL 1480 if (method == FT_GZIP && Nflag) { 1481 unsigned char ts[4]; /* timestamp */ 1482 1483 rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP); 1484 if (rv >= 0 && rv < (ssize_t)(sizeof ts)) 1485 goto unexpected_EOF; 1486 if (rv == -1) { 1487 if (!fflag) 1488 maybe_warn("can't read %s", file); 1489 goto lose; 1490 } 1491 infile_newdata(rv); 1492 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0]; 1493 1494 if (fourbytes[3] & ORIG_NAME) { 1495 rbytes = pread(fd, name, sizeof(name) - 1, GZIP_ORIGNAME); 1496 if (rbytes < 0) { 1497 maybe_warn("can't read %s", file); 1498 goto lose; 1499 } 1500 if (name[0] != '\0') { 1501 char *dp, *nf; 1502 1503 /* Make sure that name is NUL-terminated */ 1504 name[rbytes] = '\0'; 1505 1506 /* strip saved directory name */ 1507 nf = strrchr(name, '/'); 1508 if (nf == NULL) 1509 nf = name; 1510 else 1511 nf++; 1512 1513 /* preserve original directory name */ 1514 dp = strrchr(file, '/'); 1515 if (dp == NULL) 1516 dp = file; 1517 else 1518 dp++; 1519 snprintf(outfile, outsize, "%.*s%.*s", 1520 (int) (dp - file), 1521 file, (int) rbytes, nf); 1522 } 1523 } 1524 } 1525 #endif 1526 lseek(fd, 0, SEEK_SET); 1527 1528 if (cflag == 0 || lflag) { 1529 #ifndef SMALL 1530 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1531 maybe_warnx("%s has %d other links -- skipping", 1532 file, isb.st_nlink - 1); 1533 goto lose; 1534 } 1535 if (nflag == 0 && timestamp) 1536 isb.st_mtime = timestamp; 1537 if (check_outfile(outfile) == 0) 1538 goto lose; 1539 #endif 1540 } 1541 1542 if (cflag) 1543 zfd = STDOUT_FILENO; 1544 else if (lflag) 1545 zfd = -1; 1546 else { 1547 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1548 if (zfd == STDOUT_FILENO) { 1549 /* We won't close STDOUT_FILENO later... */ 1550 zfd = dup(zfd); 1551 close(STDOUT_FILENO); 1552 } 1553 if (zfd == -1) { 1554 maybe_warn("can't open %s", outfile); 1555 goto lose; 1556 } 1557 } 1558 1559 switch (method) { 1560 #ifndef NO_BZIP2_SUPPORT 1561 case FT_BZIP2: 1562 /* XXX */ 1563 if (lflag) { 1564 maybe_warnx("no -l with bzip2 files"); 1565 goto lose; 1566 } 1567 1568 size = unbzip2(fd, zfd, NULL, 0, NULL); 1569 break; 1570 #endif 1571 1572 #ifndef NO_COMPRESS_SUPPORT 1573 case FT_Z: { 1574 FILE *in, *out; 1575 1576 /* XXX */ 1577 if (lflag) { 1578 maybe_warnx("no -l with Lempel-Ziv files"); 1579 goto lose; 1580 } 1581 1582 if ((in = zdopen(fd)) == NULL) { 1583 maybe_warn("zdopen for read: %s", file); 1584 goto lose; 1585 } 1586 1587 out = fdopen(dup(zfd), "w"); 1588 if (out == NULL) { 1589 maybe_warn("fdopen for write: %s", outfile); 1590 fclose(in); 1591 goto lose; 1592 } 1593 1594 size = zuncompress(in, out, NULL, 0, NULL); 1595 /* need to fclose() if ferror() is true... */ 1596 if (ferror(in) | fclose(in)) { 1597 maybe_warn("failed infile fclose"); 1598 unlink(outfile); 1599 (void)fclose(out); 1600 } 1601 if (fclose(out) != 0) { 1602 maybe_warn("failed outfile fclose"); 1603 unlink(outfile); 1604 goto lose; 1605 } 1606 break; 1607 } 1608 #endif 1609 1610 #ifndef NO_PACK_SUPPORT 1611 case FT_PACK: 1612 if (lflag) { 1613 maybe_warnx("no -l with packed files"); 1614 goto lose; 1615 } 1616 1617 size = unpack(fd, zfd, NULL, 0, NULL); 1618 break; 1619 #endif 1620 1621 #ifndef NO_XZ_SUPPORT 1622 case FT_XZ: 1623 if (lflag) { 1624 size = unxz_len(fd); 1625 print_list_out(in_size, size, file); 1626 return -1; 1627 } 1628 size = unxz(fd, zfd, NULL, 0, NULL); 1629 break; 1630 #endif 1631 1632 #ifndef NO_LZ_SUPPORT 1633 case FT_LZ: 1634 if (lflag) { 1635 maybe_warnx("no -l with lzip files"); 1636 goto lose; 1637 } 1638 size = unlz(fd, zfd, NULL, 0, NULL); 1639 break; 1640 #endif 1641 #ifndef SMALL 1642 case FT_UNKNOWN: 1643 if (lflag) { 1644 maybe_warnx("no -l for unknown filetypes"); 1645 goto lose; 1646 } 1647 size = cat_fd(NULL, 0, NULL, fd); 1648 break; 1649 #endif 1650 default: 1651 if (lflag) { 1652 print_list(fd, in_size, outfile, isb.st_mtime); 1653 close(fd); 1654 return -1; /* XXX */ 1655 } 1656 1657 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1658 break; 1659 } 1660 1661 if (close(fd) != 0) 1662 maybe_warn("couldn't close input"); 1663 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1664 maybe_warn("couldn't close output"); 1665 1666 if (size == -1) { 1667 if (cflag == 0) 1668 unlink(outfile); 1669 maybe_warnx("%s: uncompress failed", file); 1670 return -1; 1671 } 1672 1673 /* if testing, or we uncompressed to stdout, this is all we need */ 1674 #ifndef SMALL 1675 if (tflag) 1676 return size; 1677 #endif 1678 /* if we are uncompressing to stdin, don't remove the file. */ 1679 if (cflag) 1680 return size; 1681 1682 /* 1683 * if we create a file... 1684 */ 1685 /* 1686 * if we can't stat the file don't remove the file. 1687 */ 1688 1689 ofd = open(outfile, O_RDWR, 0); 1690 if (ofd == -1) { 1691 maybe_warn("couldn't open (leaving original): %s", 1692 outfile); 1693 return -1; 1694 } 1695 if (fstat(ofd, &osb) != 0) { 1696 maybe_warn("couldn't stat (leaving original): %s", 1697 outfile); 1698 close(ofd); 1699 return -1; 1700 } 1701 if (osb.st_size != size) { 1702 maybe_warnx("stat gave different size: %" PRIdOFF 1703 " != %" PRIdOFF " (leaving original)", 1704 size, osb.st_size); 1705 close(ofd); 1706 unlink(outfile); 1707 return -1; 1708 } 1709 unlink_input(file, &isb); 1710 #ifndef SMALL 1711 copymodes(ofd, &isb, outfile); 1712 #endif 1713 close(ofd); 1714 return size; 1715 1716 unexpected_EOF: 1717 maybe_warnx("%s: unexpected end of file", file); 1718 lose: 1719 if (fd != -1) 1720 close(fd); 1721 if (zfd != -1 && zfd != STDOUT_FILENO) 1722 close(fd); 1723 return -1; 1724 } 1725 1726 #ifndef check_siginfo 1727 static void 1728 check_siginfo(void) 1729 { 1730 static int ttyfd = -2; 1731 char buf[2048]; 1732 int n; 1733 1734 if (print_info == 0) 1735 return; 1736 1737 if (!infile) 1738 goto out; 1739 1740 if (ttyfd == -2) 1741 ttyfd = open(_PATH_TTY, O_RDWR | O_CLOEXEC); 1742 1743 if (ttyfd == -1) 1744 goto out; 1745 1746 if (infile_total) { 1747 const double pcent = (100.0 * infile_current) / infile_total; 1748 1749 n = snprintf(buf, sizeof(buf), 1750 "%s: %s: done %ju/%ju bytes (%3.2f%%)\n", 1751 getprogname(), infile, (uintmax_t)infile_current, 1752 (uintmax_t)infile_total, pcent); 1753 } else { 1754 n = snprintf(buf, sizeof(buf), "%s: %s: done %ju bytes\n", 1755 getprogname(), infile, (uintmax_t)infile_current); 1756 } 1757 1758 if (n <= 0) 1759 goto out; 1760 1761 write(ttyfd, buf, (size_t)n); 1762 out: 1763 print_info = 0; 1764 } 1765 #endif 1766 1767 static off_t 1768 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd) 1769 { 1770 char buf[BUFLEN]; 1771 off_t in_tot; 1772 ssize_t w; 1773 1774 in_tot = count; 1775 w = write_retry(STDOUT_FILENO, prepend, count); 1776 if (w == -1 || (size_t)w != count) { 1777 maybe_warn("write to stdout"); 1778 return -1; 1779 } 1780 for (;;) { 1781 ssize_t rv; 1782 1783 rv = read(fd, buf, sizeof buf); 1784 if (rv == 0) 1785 break; 1786 if (rv < 0) { 1787 maybe_warn("read from fd %d", fd); 1788 break; 1789 } 1790 infile_newdata(rv); 1791 1792 if (write_retry(STDOUT_FILENO, buf, rv) != rv) { 1793 maybe_warn("write to stdout"); 1794 break; 1795 } 1796 in_tot += rv; 1797 } 1798 1799 if (gsizep) 1800 *gsizep = in_tot; 1801 return (in_tot); 1802 } 1803 1804 static void 1805 handle_stdin(void) 1806 { 1807 struct stat isb; 1808 unsigned char fourbytes[4]; 1809 size_t in_size; 1810 off_t usize, gsize; 1811 enum filetype method; 1812 ssize_t bytes_read; 1813 #ifndef NO_COMPRESS_SUPPORT 1814 FILE *in; 1815 #endif 1816 1817 #ifndef SMALL 1818 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1819 maybe_warnx("standard input is a terminal -- ignoring"); 1820 goto out; 1821 } 1822 #endif 1823 1824 if (fstat(STDIN_FILENO, &isb) < 0) { 1825 maybe_warn("fstat"); 1826 goto out; 1827 } 1828 if (S_ISREG(isb.st_mode)) 1829 in_size = isb.st_size; 1830 else 1831 in_size = 0; 1832 infile_set("(stdin)", in_size); 1833 1834 if (lflag) { 1835 print_list(STDIN_FILENO, in_size, infile, isb.st_mtime); 1836 goto out; 1837 } 1838 1839 bytes_read = read_retry(STDIN_FILENO, fourbytes, sizeof fourbytes); 1840 if (bytes_read == -1) { 1841 maybe_warn("can't read stdin"); 1842 goto out; 1843 } else if (bytes_read != sizeof(fourbytes)) { 1844 maybe_warnx("(stdin): unexpected end of file"); 1845 goto out; 1846 } 1847 1848 method = file_gettype(fourbytes); 1849 switch (method) { 1850 default: 1851 #ifndef SMALL 1852 if (fflag == 0) { 1853 maybe_warnx("unknown compression format"); 1854 goto out; 1855 } 1856 usize = cat_fd(fourbytes, sizeof fourbytes, &gsize, STDIN_FILENO); 1857 break; 1858 #endif 1859 case FT_GZIP: 1860 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1861 (char *)fourbytes, sizeof fourbytes, &gsize, "(stdin)"); 1862 break; 1863 #ifndef NO_BZIP2_SUPPORT 1864 case FT_BZIP2: 1865 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1866 (char *)fourbytes, sizeof fourbytes, &gsize); 1867 break; 1868 #endif 1869 #ifndef NO_COMPRESS_SUPPORT 1870 case FT_Z: 1871 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1872 maybe_warnx("zopen of stdin"); 1873 goto out; 1874 } 1875 1876 usize = zuncompress(in, stdout, (char *)fourbytes, 1877 sizeof fourbytes, &gsize); 1878 fclose(in); 1879 break; 1880 #endif 1881 #ifndef NO_PACK_SUPPORT 1882 case FT_PACK: 1883 usize = unpack(STDIN_FILENO, STDOUT_FILENO, 1884 (char *)fourbytes, sizeof fourbytes, &gsize); 1885 break; 1886 #endif 1887 #ifndef NO_XZ_SUPPORT 1888 case FT_XZ: 1889 usize = unxz(STDIN_FILENO, STDOUT_FILENO, 1890 (char *)fourbytes, sizeof fourbytes, &gsize); 1891 break; 1892 #endif 1893 #ifndef NO_LZ_SUPPORT 1894 case FT_LZ: 1895 usize = unlz(STDIN_FILENO, STDOUT_FILENO, 1896 (char *)fourbytes, sizeof fourbytes, &gsize); 1897 break; 1898 #endif 1899 } 1900 1901 #ifndef SMALL 1902 if (vflag && !tflag && usize != -1 && gsize != -1) 1903 print_verbage(NULL, NULL, usize, gsize); 1904 if (vflag && tflag) 1905 print_test("(stdin)", usize != -1); 1906 #else 1907 (void)&usize; 1908 #endif 1909 1910 out: 1911 infile_clear(); 1912 } 1913 1914 static void 1915 handle_stdout(void) 1916 { 1917 off_t gsize; 1918 #ifndef SMALL 1919 off_t usize; 1920 struct stat sb; 1921 time_t systime; 1922 uint32_t mtime; 1923 int ret; 1924 1925 infile_set("<stdout>", 0); 1926 1927 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1928 maybe_warnx("standard output is a terminal -- ignoring"); 1929 return; 1930 } 1931 1932 /* If stdin is a file use its mtime, otherwise use current time */ 1933 ret = fstat(STDIN_FILENO, &sb); 1934 if (ret < 0) { 1935 maybe_warn("Can't stat stdin"); 1936 return; 1937 } 1938 1939 if (S_ISREG(sb.st_mode)) { 1940 infile_set("<stdout>", sb.st_size); 1941 mtime = (uint32_t)sb.st_mtime; 1942 } else { 1943 systime = time(NULL); 1944 if (systime == -1) { 1945 maybe_warn("time"); 1946 return; 1947 } 1948 mtime = (uint32_t)systime; 1949 } 1950 1951 usize = 1952 #endif 1953 gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime); 1954 #ifndef SMALL 1955 if (vflag && !tflag && usize != -1 && gsize != -1) 1956 print_verbage(NULL, NULL, usize, gsize); 1957 #endif 1958 } 1959 1960 /* do what is asked for, for the path name */ 1961 static void 1962 handle_pathname(char *path) 1963 { 1964 char *opath = path, *s = NULL; 1965 ssize_t len; 1966 int slen; 1967 struct stat sb; 1968 1969 /* check for stdout/stdin */ 1970 if (path[0] == '-' && path[1] == '\0') { 1971 if (dflag) 1972 handle_stdin(); 1973 else 1974 handle_stdout(); 1975 return; 1976 } 1977 1978 retry: 1979 if (stat(path, &sb) != 0) { 1980 /* lets try <path>.gz if we're decompressing */ 1981 if (dflag && s == NULL && errno == ENOENT) { 1982 len = strlen(path); 1983 slen = suffixes[0].ziplen; 1984 s = malloc(len + slen + 1); 1985 if (s == NULL) 1986 maybe_err("malloc"); 1987 memcpy(s, path, len); 1988 memcpy(s + len, suffixes[0].zipped, slen + 1); 1989 path = s; 1990 goto retry; 1991 } 1992 maybe_warn("can't stat: %s", opath); 1993 goto out; 1994 } 1995 1996 if (S_ISDIR(sb.st_mode)) { 1997 #ifndef SMALL 1998 if (rflag) 1999 handle_dir(path); 2000 else 2001 #endif 2002 maybe_warnx("%s is a directory", path); 2003 goto out; 2004 } 2005 2006 if (S_ISREG(sb.st_mode)) 2007 handle_file(path, &sb); 2008 else 2009 maybe_warnx("%s is not a regular file", path); 2010 2011 out: 2012 if (s) 2013 free(s); 2014 } 2015 2016 /* compress/decompress a file */ 2017 static void 2018 handle_file(char *file, struct stat *sbp) 2019 { 2020 off_t usize, gsize; 2021 char outfile[PATH_MAX]; 2022 2023 infile_set(file, sbp->st_size); 2024 if (dflag) { 2025 usize = file_uncompress(file, outfile, sizeof(outfile)); 2026 #ifndef SMALL 2027 if (vflag && tflag) 2028 print_test(file, usize != -1); 2029 #endif 2030 if (usize == -1) 2031 return; 2032 gsize = sbp->st_size; 2033 } else { 2034 gsize = file_compress(file, outfile, sizeof(outfile)); 2035 if (gsize == -1) 2036 return; 2037 usize = sbp->st_size; 2038 } 2039 infile_clear(); 2040 2041 #ifndef SMALL 2042 if (vflag && !tflag) 2043 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 2044 #endif 2045 } 2046 2047 #ifndef SMALL 2048 /* this is used with -r to recursively descend directories */ 2049 static void 2050 handle_dir(char *dir) 2051 { 2052 char *path_argv[2]; 2053 FTS *fts; 2054 FTSENT *entry; 2055 2056 path_argv[0] = dir; 2057 path_argv[1] = 0; 2058 fts = fts_open(path_argv, FTS_PHYSICAL | FTS_NOCHDIR, NULL); 2059 if (fts == NULL) { 2060 warn("couldn't fts_open %s", dir); 2061 return; 2062 } 2063 2064 while ((entry = fts_read(fts))) { 2065 switch(entry->fts_info) { 2066 case FTS_D: 2067 case FTS_DP: 2068 continue; 2069 2070 case FTS_DNR: 2071 case FTS_ERR: 2072 case FTS_NS: 2073 maybe_warn("%s", entry->fts_path); 2074 continue; 2075 case FTS_F: 2076 handle_file(entry->fts_path, entry->fts_statp); 2077 } 2078 } 2079 (void)fts_close(fts); 2080 } 2081 #endif 2082 2083 /* print a ratio - size reduction as a fraction of uncompressed size */ 2084 static void 2085 print_ratio(off_t in, off_t out, FILE *where) 2086 { 2087 int percent10; /* 10 * percent */ 2088 off_t diff; 2089 char buff[8]; 2090 int len; 2091 2092 diff = in - out/2; 2093 if (in == 0 && out == 0) 2094 percent10 = 0; 2095 else if (diff < 0) 2096 /* 2097 * Output is more than double size of input! print -99.9% 2098 * Quite possibly we've failed to get the original size. 2099 */ 2100 percent10 = -999; 2101 else { 2102 /* 2103 * We only need 12 bits of result from the final division, 2104 * so reduce the values until a 32bit division will suffice. 2105 */ 2106 while (in > 0x100000) { 2107 diff >>= 1; 2108 in >>= 1; 2109 } 2110 if (in != 0) 2111 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 2112 else 2113 percent10 = 0; 2114 } 2115 2116 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 2117 /* Move the '.' to before the last digit */ 2118 buff[len - 1] = buff[len - 2]; 2119 buff[len - 2] = '.'; 2120 fprintf(where, "%5s%%", buff); 2121 } 2122 2123 #ifndef SMALL 2124 /* print compression statistics, and the new name (if there is one!) */ 2125 static void 2126 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 2127 { 2128 if (file) 2129 fprintf(stderr, "%s:%s ", file, 2130 strlen(file) < 7 ? "\t\t" : "\t"); 2131 print_ratio(usize, gsize, stderr); 2132 if (nfile) 2133 fprintf(stderr, " -- replaced with %s", nfile); 2134 fprintf(stderr, "\n"); 2135 fflush(stderr); 2136 } 2137 2138 /* print test results */ 2139 static void 2140 print_test(const char *file, int ok) 2141 { 2142 2143 if (exit_value == 0 && ok == 0) 2144 exit_value = 1; 2145 fprintf(stderr, "%s:%s %s\n", file, 2146 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 2147 fflush(stderr); 2148 } 2149 #endif 2150 2151 /* print a file's info ala --list */ 2152 /* eg: 2153 compressed uncompressed ratio uncompressed_name 2154 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 2155 */ 2156 static void 2157 print_list(int fd, off_t out, const char *outfile, time_t ts) 2158 { 2159 static int first = 1; 2160 #ifndef SMALL 2161 static off_t in_tot, out_tot; 2162 uint32_t crc = 0; 2163 #endif 2164 off_t in = 0, rv; 2165 2166 if (first) { 2167 #ifndef SMALL 2168 if (vflag) 2169 printf("method crc date time "); 2170 #endif 2171 if (qflag == 0) 2172 printf(" compressed uncompressed " 2173 "ratio uncompressed_name\n"); 2174 } 2175 first = 0; 2176 2177 /* print totals? */ 2178 #ifndef SMALL 2179 if (fd == -1) { 2180 in = in_tot; 2181 out = out_tot; 2182 } else 2183 #endif 2184 { 2185 /* read the last 4 bytes - this is the uncompressed size */ 2186 rv = lseek(fd, (off_t)(-8), SEEK_END); 2187 if (rv != -1) { 2188 unsigned char buf[8]; 2189 uint32_t usize; 2190 2191 rv = read(fd, (char *)buf, sizeof(buf)); 2192 if (rv == -1) 2193 maybe_warn("read of uncompressed size"); 2194 else if (rv != sizeof(buf)) 2195 maybe_warnx("read of uncompressed size"); 2196 2197 else { 2198 usize = buf[4]; 2199 usize |= (unsigned int)buf[5] << 8; 2200 usize |= (unsigned int)buf[6] << 16; 2201 usize |= (unsigned int)buf[7] << 24; 2202 in = (off_t)usize; 2203 #ifndef SMALL 2204 crc = buf[0]; 2205 crc |= (unsigned int)buf[1] << 8; 2206 crc |= (unsigned int)buf[2] << 16; 2207 crc |= (unsigned int)buf[3] << 24; 2208 #endif 2209 } 2210 } 2211 } 2212 2213 #ifndef SMALL 2214 if (vflag && fd == -1) 2215 printf(" "); 2216 else if (vflag) { 2217 char *date = ctime(&ts); 2218 2219 /* skip the day, 1/100th second, and year */ 2220 date += 4; 2221 date[12] = 0; 2222 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 2223 } 2224 in_tot += in; 2225 out_tot += out; 2226 #endif 2227 print_list_out(out, in, outfile); 2228 } 2229 2230 static void 2231 print_list_out(off_t out, off_t in, const char *outfile) 2232 { 2233 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 2234 print_ratio(in, out, stdout); 2235 printf(" %s\n", outfile); 2236 } 2237 2238 /* display the usage of NetBSD gzip */ 2239 static void 2240 usage(void) 2241 { 2242 2243 fprintf(stderr, "%s\n", gzip_version); 2244 fprintf(stderr, 2245 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n" 2246 #ifndef SMALL 2247 " -1 --fast fastest (worst) compression\n" 2248 " -2 .. -8 set compression level\n" 2249 " -9 --best best (slowest) compression\n" 2250 " -c --stdout write to stdout, keep original files\n" 2251 " --to-stdout\n" 2252 " -d --decompress uncompress files\n" 2253 " --uncompress\n" 2254 " -f --force force overwriting & compress links\n" 2255 " -h --help display this help\n" 2256 " -k --keep don't delete input files during operation\n" 2257 " -l --list list compressed file contents\n" 2258 " -N --name save or restore original file name and time stamp\n" 2259 " -n --no-name don't save original file name or time stamp\n" 2260 " -q --quiet output no warnings\n" 2261 " -r --recursive recursively compress files in directories\n" 2262 " -S .suf use suffix .suf instead of .gz\n" 2263 " --suffix .suf\n" 2264 " -t --test test compressed file\n" 2265 " -V --version display program version\n" 2266 " -v --verbose print extra statistics\n", 2267 #else 2268 , 2269 #endif 2270 getprogname()); 2271 exit(0); 2272 } 2273 2274 /* display the version of NetBSD gzip */ 2275 static void 2276 display_version(void) 2277 { 2278 2279 fprintf(stderr, "%s\n", gzip_version); 2280 exit(0); 2281 } 2282 2283 #ifndef NO_BZIP2_SUPPORT 2284 #include "unbzip2.c" 2285 #endif 2286 #ifndef NO_COMPRESS_SUPPORT 2287 #include "zuncompress.c" 2288 #endif 2289 #ifndef NO_PACK_SUPPORT 2290 #include "unpack.c" 2291 #endif 2292 #ifndef NO_XZ_SUPPORT 2293 #include "unxz.c" 2294 #endif 2295 #ifndef NO_LZ_SUPPORT 2296 #include "unlz.c" 2297 #endif 2298 2299 static ssize_t 2300 read_retry(int fd, void *buf, size_t sz) 2301 { 2302 char *cp = buf; 2303 size_t left = MIN(sz, (size_t) SSIZE_MAX); 2304 2305 while (left > 0) { 2306 ssize_t ret; 2307 2308 ret = read(fd, cp, left); 2309 if (ret == -1) { 2310 return ret; 2311 } else if (ret == 0) { 2312 break; /* EOF */ 2313 } 2314 cp += ret; 2315 left -= ret; 2316 } 2317 2318 return sz - left; 2319 } 2320 2321 static ssize_t 2322 write_retry(int fd, const void *buf, size_t sz) 2323 { 2324 const char *cp = buf; 2325 size_t left = MIN(sz, (size_t) SSIZE_MAX); 2326 2327 while (left > 0) { 2328 ssize_t ret; 2329 2330 ret = write(fd, cp, left); 2331 if (ret == -1) { 2332 return ret; 2333 } else if (ret == 0) { 2334 abort(); /* Can't happen */ 2335 } 2336 cp += ret; 2337 left -= ret; 2338 } 2339 2340 return sz - left; 2341 } 2342
Indexes created Sat Sep 20 22:09:52 GMT 2025