1/* 2 * Copyright (c) Ian F. Darwin 1986-1995. 3 * Software written by Ian F. Darwin and others; 4 * maintained 1995-present by Christos Zoulas and others. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice immediately at the beginning of the file, without modification, 11 * 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 AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, 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 * file - find type of a file or files - main program. 30 */ 31 32#include "file.h" 33 34#ifndef lint 35FILE_RCSID("@(#)$File: file.c,v 1.215 2023/05/21 17:08:34 christos Exp $") 36#endif /* lint */ 37 38#include "magic.h" 39 40#include <stdlib.h> 41#include <unistd.h> 42#include <string.h> 43#ifdef RESTORE_TIME 44# if (__COHERENT__ >= 0x420) 45# include <sys/utime.h> 46# else 47# ifdef USE_UTIMES 48# include <sys/time.h> 49# else 50# include <utime.h> 51# endif 52# endif 53#endif 54#ifdef HAVE_UNISTD_H 55#include <unistd.h> /* for read() */ 56#endif 57#ifdef HAVE_WCHAR_H 58#include <wchar.h> 59#endif 60#ifdef HAVE_WCTYPE_H 61#include <wctype.h> 62#endif 63#if defined(HAVE_WCHAR_H) && defined(HAVE_MBRTOWC) && defined(HAVE_WCWIDTH) && \ 64 defined(HAVE_WCTYPE_H) 65#define FILE_WIDE_SUPPORT 66#else 67#include <ctype.h> 68#endif 69 70#if defined(HAVE_GETOPT_H) && defined(HAVE_STRUCT_OPTION) 71# include <getopt.h> 72# ifndef HAVE_GETOPT_LONG 73int getopt_long(int, char * const *, const char *, 74 const struct option *, int *); 75# endif 76# else 77# include "mygetopt.h" 78#endif 79 80#ifdef S_IFLNK 81# define IFLNK_h "h" 82# define IFLNK_L "L" 83#else 84# define IFLNK_h "" 85# define IFLNK_L "" 86#endif 87 88#define FILE_FLAGS "bcCdE" IFLNK_h "ik" IFLNK_L "lNnprsSvzZ0" 89#define OPTSTRING "bcCde:Ef:F:hiklLm:nNpP:rsSvzZ0" 90 91# define USAGE \ 92 "Usage: %s [-" FILE_FLAGS "] [--apple] [--extension] [--mime-encoding]\n" \ 93 " [--mime-type] [-e <testname>] [-F <separator>] " \ 94 " [-f <namefile>]\n" \ 95 " [-m <magicfiles>] [-P <parameter=value>] [--exclude-quiet]\n" \ 96 " <file> ...\n" \ 97 " %s -C [-m <magicfiles>]\n" \ 98 " %s [--help]\n" 99 100file_private int /* Global command-line options */ 101 bflag = 0, /* brief output format */ 102 nopad = 0, /* Don't pad output */ 103 nobuffer = 0, /* Do not buffer stdout */ 104 nulsep = 0; /* Append '\0' to the separator */ 105 106file_private const char *separator = ":"; /* Default field separator */ 107file_private const struct option long_options[] = { 108#define OPT_HELP 1 109#define OPT_APPLE 2 110#define OPT_EXTENSIONS 3 111#define OPT_MIME_TYPE 4 112#define OPT_MIME_ENCODING 5 113#define OPT_EXCLUDE_QUIET 6 114#define OPT(shortname, longname, opt, def, doc) \ 115 {longname, opt, NULL, shortname}, 116#define OPT_LONGONLY(longname, opt, def, doc, id) \ 117 {longname, opt, NULL, id}, 118#include "file_opts.h" 119#undef OPT 120#undef OPT_LONGONLY 121 {0, 0, NULL, 0} 122 }; 123 124file_private const struct { 125 const char *name; 126 int value; 127} nv[] = { 128 { "apptype", MAGIC_NO_CHECK_APPTYPE }, 129 { "ascii", MAGIC_NO_CHECK_ASCII }, 130 { "cdf", MAGIC_NO_CHECK_CDF }, 131 { "compress", MAGIC_NO_CHECK_COMPRESS }, 132 { "csv", MAGIC_NO_CHECK_CSV }, 133 { "elf", MAGIC_NO_CHECK_ELF }, 134 { "encoding", MAGIC_NO_CHECK_ENCODING }, 135 { "soft", MAGIC_NO_CHECK_SOFT }, 136 { "tar", MAGIC_NO_CHECK_TAR }, 137 { "json", MAGIC_NO_CHECK_JSON }, 138 { "simh", MAGIC_NO_CHECK_SIMH }, 139 { "text", MAGIC_NO_CHECK_TEXT }, /* synonym for ascii */ 140 { "tokens", MAGIC_NO_CHECK_TOKENS }, /* OBSOLETE: ignored for backwards compatibility */ 141}; 142 143file_private struct { 144 const char *name; 145 size_t value; 146 size_t def; 147 const char *desc; 148 int tag; 149 int set; 150} pm[] = { 151 { "bytes", 0, FILE_BYTES_MAX, "max bytes to look inside file", 152 MAGIC_PARAM_BYTES_MAX, 0 }, 153 { "elf_notes", 0, FILE_ELF_NOTES_MAX, "max ELF notes processed", 154 MAGIC_PARAM_ELF_NOTES_MAX, 0 }, 155 { "elf_phnum", 0, FILE_ELF_PHNUM_MAX, "max ELF prog sections processed", 156 MAGIC_PARAM_ELF_PHNUM_MAX, 0 }, 157 { "elf_shnum", 0, FILE_ELF_SHNUM_MAX, "max ELF sections processed", 158 MAGIC_PARAM_ELF_SHNUM_MAX, 0 }, 159 { "elf_shsize", 0, FILE_ELF_SHSIZE_MAX, "max ELF section size", 160 MAGIC_PARAM_ELF_SHSIZE_MAX, 0 }, 161 { "encoding", 0, FILE_ENCODING_MAX, "max bytes to scan for encoding", 162 MAGIC_PARAM_ENCODING_MAX, 0 }, 163 { "indir", 0, FILE_INDIR_MAX, "recursion limit for indirection", 164 MAGIC_PARAM_INDIR_MAX, 0 }, 165 { "name", 0, FILE_NAME_MAX, "use limit for name/use magic", 166 MAGIC_PARAM_NAME_MAX, 0 }, 167 { "regex", 0, FILE_REGEX_MAX, "length limit for REGEX searches", 168 MAGIC_PARAM_REGEX_MAX, 0 }, 169}; 170 171file_private int posixly; 172 173#ifdef __dead 174__dead 175#endif 176file_private void usage(void); 177file_private void docprint(const char *, int); 178#ifdef __dead 179__dead 180#endif 181file_private void help(void); 182 183file_private int unwrap(struct magic_set *, const char *); 184file_private int process(struct magic_set *ms, const char *, int); 185file_private struct magic_set *load(const char *, int); 186file_private void setparam(const char *); 187file_private void applyparam(magic_t); 188 189 190/* 191 * main - parse arguments and handle options 192 */ 193int 194main(int argc, char *argv[]) 195{ 196 int c; 197 size_t i, j, wid, nw; 198 int action = 0, didsomefiles = 0, errflg = 0; 199 int flags = 0, e = 0; 200#ifdef HAVE_LIBSECCOMP 201 int sandbox = 1; 202#endif 203 struct magic_set *magic = NULL; 204 int longindex; 205 const char *magicfile = NULL; /* where the magic is */ 206 char *progname; 207 208 /* makes islower etc work for other langs */ 209 (void)setlocale(LC_CTYPE, ""); 210 211#ifdef __EMX__ 212 /* sh-like wildcard expansion! Shouldn't hurt at least ... */ 213 _wildcard(&argc, &argv); 214#endif 215 216 if ((progname = strrchr(argv[0], '/')) != NULL) 217 progname++; 218 else 219 progname = argv[0]; 220 221 file_setprogname(progname); 222 223 224#ifdef S_IFLNK 225 posixly = getenv("POSIXLY_CORRECT") != NULL; 226 flags |= posixly ? MAGIC_SYMLINK : 0; 227#endif 228 while ((c = getopt_long(argc, argv, OPTSTRING, long_options, 229 &longindex)) != -1) 230 switch (c) { 231 case OPT_HELP: 232 help(); 233 break; 234 case OPT_APPLE: 235 flags |= MAGIC_APPLE; 236 break; 237 case OPT_EXTENSIONS: 238 flags |= MAGIC_EXTENSION; 239 break; 240 case OPT_MIME_TYPE: 241 flags |= MAGIC_MIME_TYPE; 242 break; 243 case OPT_MIME_ENCODING: 244 flags |= MAGIC_MIME_ENCODING; 245 break; 246 case '0': 247 nulsep++; 248 break; 249 case 'b': 250 bflag++; 251 break; 252 case 'c': 253 action = FILE_CHECK; 254 break; 255 case 'C': 256 action = FILE_COMPILE; 257 break; 258 case 'd': 259 flags |= MAGIC_DEBUG|MAGIC_CHECK; 260 break; 261 case 'E': 262 flags |= MAGIC_ERROR; 263 break; 264 case 'e': 265 case OPT_EXCLUDE_QUIET: 266 for (i = 0; i < __arraycount(nv); i++) 267 if (strcmp(nv[i].name, optarg) == 0) 268 break; 269 270 if (i == __arraycount(nv)) { 271 if (c != OPT_EXCLUDE_QUIET) 272 errflg++; 273 } else 274 flags |= nv[i].value; 275 break; 276 277 case 'f': 278 if(action) 279 usage(); 280 if (magic == NULL) 281 if ((magic = load(magicfile, flags)) == NULL) 282 return 1; 283 applyparam(magic); 284 e |= unwrap(magic, optarg); 285 ++didsomefiles; 286 break; 287 case 'F': 288 separator = optarg; 289 break; 290 case 'i': 291 flags |= MAGIC_MIME; 292 break; 293 case 'k': 294 flags |= MAGIC_CONTINUE; 295 break; 296 case 'l': 297 action = FILE_LIST; 298 break; 299 case 'm': 300 magicfile = optarg; 301 break; 302 case 'n': 303 ++nobuffer; 304 break; 305 case 'N': 306 ++nopad; 307 break; 308#if defined(HAVE_UTIME) || defined(HAVE_UTIMES) 309 case 'p': 310 flags |= MAGIC_PRESERVE_ATIME; 311 break; 312#endif 313 case 'P': 314 setparam(optarg); 315 break; 316 case 'r': 317 flags |= MAGIC_RAW; 318 break; 319 case 's': 320 flags |= MAGIC_DEVICES; 321 break; 322 case 'S': 323#ifdef HAVE_LIBSECCOMP 324 sandbox = 0; 325#endif 326 break; 327 case 'v': 328 if (magicfile == NULL) 329 magicfile = magic_getpath(magicfile, action); 330 (void)fprintf(stdout, "%s-%s\n", file_getprogname(), 331 VERSION); 332 (void)fprintf(stdout, "magic file from %s\n", 333 magicfile); 334#ifdef HAVE_LIBSECCOMP 335 (void)fprintf(stdout, "seccomp support included\n"); 336#endif 337 return 0; 338 case 'z': 339 flags |= MAGIC_COMPRESS; 340 break; 341 342 case 'Z': 343 flags |= MAGIC_COMPRESS|MAGIC_COMPRESS_TRANSP; 344 break; 345#ifdef S_IFLNK 346 case 'L': 347 flags |= MAGIC_SYMLINK; 348 break; 349 case 'h': 350 flags &= ~MAGIC_SYMLINK; 351 break; 352#endif 353 case '?': 354 default: 355 errflg++; 356 break; 357 } 358 359 if (errflg) { 360 usage(); 361 } 362 if (e) 363 return e; 364 365#ifdef HAVE_LIBSECCOMP 366#if 0 367 if (sandbox && enable_sandbox_basic() == -1) 368#else 369 if (sandbox && enable_sandbox_full() == -1) 370#endif 371 file_err(EXIT_FAILURE, "SECCOMP initialisation failed"); 372 if (sandbox) 373 flags |= MAGIC_NO_COMPRESS_FORK; 374#endif /* HAVE_LIBSECCOMP */ 375 376 if (MAGIC_VERSION != magic_version()) 377 file_warnx("Compiled magic version [%d] " 378 "does not match with shared library magic version [%d]\n", 379 MAGIC_VERSION, magic_version()); 380 381 switch(action) { 382 case FILE_CHECK: 383 case FILE_COMPILE: 384 case FILE_LIST: 385 /* 386 * Don't try to check/compile ~/.magic unless we explicitly 387 * ask for it. 388 */ 389 magic = magic_open(flags|MAGIC_CHECK); 390 if (magic == NULL) { 391 file_warn("Can't create magic"); 392 return 1; 393 } 394 395 396 switch(action) { 397 case FILE_CHECK: 398 c = magic_check(magic, magicfile); 399 break; 400 case FILE_COMPILE: 401 c = magic_compile(magic, magicfile); 402 break; 403 case FILE_LIST: 404 c = magic_list(magic, magicfile); 405 break; 406 default: 407 abort(); 408 } 409 if (c == -1) { 410 file_warnx("%s", magic_error(magic)); 411 e = 1; 412 goto out; 413 } 414 goto out; 415 default: 416 if (magic == NULL) 417 if ((magic = load(magicfile, flags)) == NULL) 418 return 1; 419 applyparam(magic); 420 } 421 422 if (optind == argc) { 423 if (!didsomefiles) 424 usage(); 425 goto out; 426 } 427 428 for (wid = 0, j = CAST(size_t, optind); j < CAST(size_t, argc); 429 j++) { 430 nw = file_mbswidth(magic, argv[j]); 431 if (nw > wid) 432 wid = nw; 433 } 434 435 /* 436 * If bflag is only set twice, set it depending on 437 * number of files [this is undocumented, and subject to change] 438 */ 439 if (bflag == 2) { 440 bflag = optind >= argc - 1; 441 } 442 for (; optind < argc; optind++) 443 e |= process(magic, argv[optind], wid); 444 445out: 446 if (!nobuffer) 447 e |= fflush(stdout) != 0; 448 449 if (magic) 450 magic_close(magic); 451 return e; 452} 453 454file_private void 455applyparam(magic_t magic) 456{ 457 size_t i; 458 459 for (i = 0; i < __arraycount(pm); i++) { 460 if (!pm[i].set) 461 continue; 462 if (magic_setparam(magic, pm[i].tag, &pm[i].value) == -1) 463 file_err(EXIT_FAILURE, "Can't set %s", pm[i].name); 464 } 465} 466 467file_private void 468setparam(const char *p) 469{ 470 size_t i; 471 char *s; 472 473 if ((s = CCAST(char *, strchr(p, '='))) == NULL) 474 goto badparm; 475 476 for (i = 0; i < __arraycount(pm); i++) { 477 if (strncmp(p, pm[i].name, s - p) != 0) 478 continue; 479 pm[i].value = atoi(s + 1); 480 pm[i].set = 1; 481 return; 482 } 483badparm: 484 file_errx(EXIT_FAILURE, "Unknown param %s", p); 485} 486 487file_private struct magic_set * 488/*ARGSUSED*/ 489load(const char *magicfile, int flags) 490{ 491 struct magic_set *magic = magic_open(flags); 492 const char *e; 493 494 if (magic == NULL) { 495 file_warn("Can't create magic"); 496 return NULL; 497 } 498 if (magic_load(magic, magicfile) == -1) { 499 file_warn("%s", magic_error(magic)); 500 magic_close(magic); 501 return NULL; 502 } 503 if ((e = magic_error(magic)) != NULL) 504 file_warn("%s", e); 505 return magic; 506} 507 508/* 509 * unwrap -- read a file of filenames, do each one. 510 */ 511file_private int 512unwrap(struct magic_set *ms, const char *fn) 513{ 514 FILE *f; 515 ssize_t len; 516 char *line = NULL; 517 size_t llen = 0; 518 int wid = 0, cwid; 519 int e = 0; 520 size_t fi = 0, fimax = 0; 521 char **flist = NULL; 522 523 if (strcmp("-", fn) == 0) 524 f = stdin; 525 else { 526 if ((f = fopen(fn, "r")) == NULL) { 527 file_warn("Cannot open `%s'", fn); 528 return 1; 529 } 530 } 531 532 while ((len = getline(&line, &llen, f)) > 0) { 533 if (line[len - 1] == '\n') 534 line[len - 1] = '\0'; 535 cwid = file_mbswidth(ms, line); 536 if (nobuffer) { 537 e |= process(ms, line, cwid); 538 free(line); 539 line = NULL; 540 llen = 0; 541 continue; 542 } 543 if (cwid > wid) 544 wid = cwid; 545 if (fi >= fimax) { 546 fimax += 100; 547 char **nf = CAST(char **, 548 realloc(flist, fimax * sizeof(*flist))); 549 if (nf == NULL) { 550 file_err(EXIT_FAILURE, 551 "Cannot allocate memory for file list"); 552 } 553 flist = nf; 554 } 555 flist[fi++] = line; 556 line = NULL; 557 llen = 0; 558 } 559 560 if (!nobuffer) { 561 fimax = fi; 562 for (fi = 0; fi < fimax; fi++) { 563 e |= process(ms, flist[fi], wid); 564 free(flist[fi]); 565 } 566 } 567 free(flist); 568 569 if (f != stdin) 570 (void)fclose(f); 571 return e; 572} 573 574file_private void 575file_octal(unsigned char c) 576{ 577 (void)putc('\\', stdout); 578 (void)putc(((c >> 6) & 7) + '0', stdout); 579 (void)putc(((c >> 3) & 7) + '0', stdout); 580 (void)putc(((c >> 0) & 7) + '0', stdout); 581} 582 583file_private void 584fname_print(const char *inname) 585{ 586 size_t n = strlen(inname); 587#ifdef FILE_WIDE_SUPPORT 588 mbstate_t state; 589 wchar_t nextchar; 590 size_t bytesconsumed; 591 592 593 (void)memset(&state, 0, sizeof(state)); 594 while (n > 0) { 595 bytesconsumed = mbrtowc(&nextchar, inname, n, &state); 596 if (bytesconsumed == CAST(size_t, -1) || 597 bytesconsumed == CAST(size_t, -2)) { 598 nextchar = *inname++; 599 n--; 600 (void)memset(&state, 0, sizeof(state)); 601 file_octal(CAST(unsigned char, nextchar)); 602 continue; 603 } 604 inname += bytesconsumed; 605 n -= bytesconsumed; 606 if (iswprint(nextchar)) { 607 printf("%lc", (wint_t)nextchar); 608 continue; 609 } 610 /* XXX: What if it is > 255? */ 611 file_octal(CAST(unsigned char, nextchar)); 612 } 613#else 614 size_t i; 615 for (i = 0; i < n; i++) { 616 unsigned char c = CAST(unsigned char, inname[i]); 617 if (isprint(c)) { 618 (void)putc(c, stdout); 619 continue; 620 } 621 file_octal(c); 622 } 623#endif 624} 625 626/* 627 * Called for each input file on the command line (or in a list of files) 628 */ 629file_private int 630process(struct magic_set *ms, const char *inname, int wid) 631{ 632 const char *type, c = nulsep > 1 ? '\0' : '\n'; 633 int std_in = strcmp(inname, "-") == 0; 634 int haderror = 0; 635 636 if (wid > 0 && !bflag) { 637 const char *pname = std_in ? "/dev/stdin" : inname; 638 if ((ms->flags & MAGIC_RAW) == 0) 639 fname_print(pname); 640 else 641 (void)printf("%s", pname); 642 if (nulsep) 643 (void)putc('\0', stdout); 644 if (nulsep < 2) { 645 (void)printf("%s", separator); 646 (void)printf("%*s ", CAST(int, nopad ? 0 647 : (wid - file_mbswidth(ms, inname))), ""); 648 } 649 } 650 651 type = magic_file(ms, std_in ? NULL : inname); 652 653 if (type == NULL) { 654 haderror |= printf("ERROR: %s%c", magic_error(ms), c); 655 } else { 656 haderror |= printf("%s%c", type, c) < 0; 657 } 658 if (nobuffer) 659 haderror |= fflush(stdout) != 0; 660 return haderror || type == NULL; 661} 662 663file_protected size_t 664file_mbswidth(struct magic_set *ms, const char *s) 665{ 666 size_t width = 0; 667#ifdef FILE_WIDE_SUPPORT 668 size_t bytesconsumed, n; 669 mbstate_t state; 670 wchar_t nextchar; 671 672 (void)memset(&state, 0, sizeof(state)); 673 n = strlen(s); 674 675 while (n > 0) { 676 bytesconsumed = mbrtowc(&nextchar, s, n, &state); 677 if (bytesconsumed == CAST(size_t, -1) || 678 bytesconsumed == CAST(size_t, -2)) { 679 nextchar = *s; 680 bytesconsumed = 1; 681 (void)memset(&state, 0, sizeof(state)); 682 width += 4; 683 } else { 684 int w = wcwidth(nextchar); 685 width += ((ms->flags & MAGIC_RAW) != 0 686 || iswprint(nextchar)) ? (w > 0 ? w : 1) : 4; 687 } 688 689 s += bytesconsumed, n -= bytesconsumed; 690 } 691#else 692 for (; *s; s++) { 693 width += (ms->flags & MAGIC_RAW) != 0 694 || isprint(CAST(unsigned char, *s)) ? 1 : 4; 695 } 696#endif 697 return width; 698} 699 700file_private void 701usage(void) 702{ 703 const char *pn = file_getprogname(); 704 (void)fprintf(stderr, USAGE, pn, pn, pn); 705 exit(EXIT_FAILURE); 706} 707 708file_private void 709defprint(int def) 710{ 711 if (!def) 712 return; 713 if (((def & 1) && posixly) || ((def & 2) && !posixly)) 714 (void)fprintf(stdout, " (default)"); 715 (void)putc('\n', stdout); 716} 717 718file_private void 719docprint(const char *opts, int def) 720{ 721 size_t i; 722 int comma, pad; 723 char *sp, *p; 724 725 p = CCAST(char *, strchr(opts, '%')); 726 if (p == NULL) { 727 (void)fprintf(stdout, "%s", opts); 728 defprint(def); 729 return; 730 } 731 732 for (sp = p - 1; sp > opts && *sp == ' '; sp--) 733 continue; 734 735 (void)printf("%.*s", CAST(int, p - opts), opts); 736 pad = (int)CAST(int, p - sp - 1); 737 738 switch (*++p) { 739 case 'e': 740 comma = 0; 741 for (i = 0; i < __arraycount(nv); i++) { 742 (void)printf("%s%s", comma++ ? ", " : "", nv[i].name); 743 if (i && i % 5 == 0 && i != __arraycount(nv) - 1) { 744 (void)printf(",\n%*s", pad, ""); 745 comma = 0; 746 } 747 } 748 break; 749 case 'P': 750 for (i = 0; i < __arraycount(pm); i++) { 751 (void)printf("%9s %7zu %s", pm[i].name, pm[i].def, 752 pm[i].desc); 753 if (i != __arraycount(pm) - 1) 754 (void)printf("\n%*s", pad, ""); 755 } 756 break; 757 default: 758 file_errx(EXIT_FAILURE, "Unknown escape `%c' in long options", 759 *p); 760 break; 761 } 762 (void)printf("%s", opts + (p - opts) + 1); 763 764} 765 766file_private void 767help(void) 768{ 769 (void)fputs( 770"Usage: file [OPTION...] [FILE...]\n" 771"Determine type of FILEs.\n" 772"\n", stdout); 773#define OPT(shortname, longname, opt, def, doc) \ 774 (void)printf(" -%c, --" longname, shortname), \ 775 docprint(doc, def); 776#define OPT_LONGONLY(longname, opt, def, doc, id) \ 777 (void)printf(" --" longname), \ 778 docprint(doc, def); 779#include "file_opts.h" 780#undef OPT 781#undef OPT_LONGONLY 782 (void)printf("\nReport bugs to https://bugs.astron.com/\n"); 783 exit(EXIT_SUCCESS); 784} 785 786file_private const char *file_progname; 787 788file_protected void 789file_setprogname(const char *progname) 790{ 791 file_progname = progname; 792} 793 794file_protected const char * 795file_getprogname(void) 796{ 797 return file_progname; 798} 799 800file_protected void 801file_err(int e, const char *fmt, ...) 802{ 803 va_list ap; 804 int se = errno; 805 806 va_start(ap, fmt); 807 (void)fprintf(stderr, "%s: ", file_progname); 808 (void)vfprintf(stderr, fmt, ap); 809 va_end(ap); 810 if (se) 811 (void)fprintf(stderr, " (%s)\n", strerror(se)); 812 else 813 fputc('\n', stderr); 814 exit(e); 815} 816 817file_protected void 818file_errx(int e, const char *fmt, ...) 819{ 820 va_list ap; 821 822 va_start(ap, fmt); 823 (void)fprintf(stderr, "%s: ", file_progname); 824 (void)vfprintf(stderr, fmt, ap); 825 va_end(ap); 826 (void)fprintf(stderr, "\n"); 827 exit(e); 828} 829 830file_protected void 831file_warn(const char *fmt, ...) 832{ 833 va_list ap; 834 int se = errno; 835 836 va_start(ap, fmt); 837 (void)fprintf(stderr, "%s: ", file_progname); 838 (void)vfprintf(stderr, fmt, ap); 839 va_end(ap); 840 if (se) 841 (void)fprintf(stderr, " (%s)\n", strerror(se)); 842 else 843 fputc('\n', stderr); 844 errno = se; 845} 846 847file_protected void 848file_warnx(const char *fmt, ...) 849{ 850 va_list ap; 851 int se = errno; 852 853 va_start(ap, fmt); 854 (void)fprintf(stderr, "%s: ", file_progname); 855 (void)vfprintf(stderr, fmt, ap); 856 va_end(ap); 857 (void)fprintf(stderr, "\n"); 858 errno = se; 859} 860