1 /* $NetBSD: file.c,v 1.18 2023/08/18 19:00:11 christos Exp $ */ 2 3 /* 4 * Copyright (c) Ian F. Darwin 1986-1995. 5 * Software written by Ian F. Darwin and others; 6 * maintained 1995-present by Christos Zoulas and others. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice immediately at the beginning of the file, without modification, 13 * this list of conditions, and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 22 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 /* 31 * file - find type of a file or files - main program. 32 */ 33 34 #include "file.h" 35 36 #ifndef lint 37 #if 0 38 FILE_RCSID("@(#)$File: file.c,v 1.215 2023/05/21 17:08:34 christos Exp $") 39 #else 40 __RCSID("$NetBSD: file.c,v 1.18 2023/08/18 19:00:11 christos Exp $"); 41 #endif 42 #endif /* lint */ 43 44 #include "magic.h" 45 46 #include <stdlib.h> 47 #include <unistd.h> 48 #include <string.h> 49 #ifdef RESTORE_TIME 50 # if (__COHERENT__ >= 0x420) 51 # include <sys/utime.h> 52 # else 53 # ifdef USE_UTIMES 54 # include <sys/time.h> 55 # else 56 # include <utime.h> 57 # endif 58 # endif 59 #endif 60 #ifdef HAVE_UNISTD_H 61 #include <unistd.h> /* for read() */ 62 #endif 63 #ifdef HAVE_WCHAR_H 64 #include <wchar.h> 65 #endif 66 #ifdef HAVE_WCTYPE_H 67 #include <wctype.h> 68 #endif 69 #if defined(HAVE_WCHAR_H) && defined(HAVE_MBRTOWC) && defined(HAVE_WCWIDTH) && \ 70 defined(HAVE_WCTYPE_H) 71 #define FILE_WIDE_SUPPORT 72 #else 73 #include <ctype.h> 74 #endif 75 76 #if defined(HAVE_GETOPT_H) && defined(HAVE_STRUCT_OPTION) 77 # include <getopt.h> 78 # ifndef HAVE_GETOPT_LONG 79 int getopt_long(int, char * const *, const char *, 80 const struct option *, int *); 81 # endif 82 # else 83 # include "mygetopt.h" 84 #endif 85 86 #ifdef S_IFLNK 87 # define IFLNK_h "h" 88 # define IFLNK_L "L" 89 #else 90 # define IFLNK_h "" 91 # define IFLNK_L "" 92 #endif 93 94 #define FILE_FLAGS "bcCdE" IFLNK_h "ik" IFLNK_L "lNnprsSvzZ0" 95 #define OPTSTRING "bcCde:Ef:F:hiklLm:nNpP:rsSvzZ0" 96 97 # define USAGE \ 98 "Usage: %s [-" FILE_FLAGS "] [--apple] [--extension] [--mime-encoding]\n" \ 99 " [--mime-type] [-e <testname>] [-F <separator>] " \ 100 " [-f <namefile>]\n" \ 101 " [-m <magicfiles>] [-P <parameter=value>] [--exclude-quiet]\n" \ 102 " <file> ...\n" \ 103 " %s -C [-m <magicfiles>]\n" \ 104 " %s [--help]\n" 105 106 file_private int /* Global command-line options */ 107 bflag = 0, /* brief output format */ 108 nopad = 0, /* Don't pad output */ 109 nobuffer = 0, /* Do not buffer stdout */ 110 nulsep = 0; /* Append '\0' to the separator */ 111 112 file_private const char *separator = ":"; /* Default field separator */ 113 file_private const struct option long_options[] = { 114 #define OPT_HELP 1 115 #define OPT_APPLE 2 116 #define OPT_EXTENSIONS 3 117 #define OPT_MIME_TYPE 4 118 #define OPT_MIME_ENCODING 5 119 #define OPT_EXCLUDE_QUIET 6 120 #define OPT(shortname, longname, opt, def, doc) \ 121 {longname, opt, NULL, shortname}, 122 #define OPT_LONGONLY(longname, opt, def, doc, id) \ 123 {longname, opt, NULL, id}, 124 #include "file_opts.h" 125 #undef OPT 126 #undef OPT_LONGONLY 127 {0, 0, NULL, 0} 128 }; 129 130 file_private const struct { 131 const char *name; 132 int value; 133 } nv[] = { 134 { "apptype", MAGIC_NO_CHECK_APPTYPE }, 135 { "ascii", MAGIC_NO_CHECK_ASCII }, 136 { "cdf", MAGIC_NO_CHECK_CDF }, 137 { "compress", MAGIC_NO_CHECK_COMPRESS }, 138 { "csv", MAGIC_NO_CHECK_CSV }, 139 { "elf", MAGIC_NO_CHECK_ELF }, 140 { "encoding", MAGIC_NO_CHECK_ENCODING }, 141 { "soft", MAGIC_NO_CHECK_SOFT }, 142 { "tar", MAGIC_NO_CHECK_TAR }, 143 { "json", MAGIC_NO_CHECK_JSON }, 144 { "simh", MAGIC_NO_CHECK_SIMH }, 145 { "text", MAGIC_NO_CHECK_TEXT }, /* synonym for ascii */ 146 { "tokens", MAGIC_NO_CHECK_TOKENS }, /* OBSOLETE: ignored for backwards compatibility */ 147 }; 148 149 file_private struct { 150 const char *name; 151 size_t value; 152 size_t def; 153 const char *desc; 154 int tag; 155 int set; 156 } pm[] = { 157 { "bytes", 0, FILE_BYTES_MAX, "max bytes to look inside file", 158 MAGIC_PARAM_BYTES_MAX, 0 }, 159 { "elf_notes", 0, FILE_ELF_NOTES_MAX, "max ELF notes processed", 160 MAGIC_PARAM_ELF_NOTES_MAX, 0 }, 161 { "elf_phnum", 0, FILE_ELF_PHNUM_MAX, "max ELF prog sections processed", 162 MAGIC_PARAM_ELF_PHNUM_MAX, 0 }, 163 { "elf_shnum", 0, FILE_ELF_SHNUM_MAX, "max ELF sections processed", 164 MAGIC_PARAM_ELF_SHNUM_MAX, 0 }, 165 { "elf_shsize", 0, FILE_ELF_SHSIZE_MAX, "max ELF section size", 166 MAGIC_PARAM_ELF_SHSIZE_MAX, 0 }, 167 { "encoding", 0, FILE_ENCODING_MAX, "max bytes to scan for encoding", 168 MAGIC_PARAM_ENCODING_MAX, 0 }, 169 { "indir", 0, FILE_INDIR_MAX, "recursion limit for indirection", 170 MAGIC_PARAM_INDIR_MAX, 0 }, 171 { "name", 0, FILE_NAME_MAX, "use limit for name/use magic", 172 MAGIC_PARAM_NAME_MAX, 0 }, 173 { "regex", 0, FILE_REGEX_MAX, "length limit for REGEX searches", 174 MAGIC_PARAM_REGEX_MAX, 0 }, 175 }; 176 177 file_private int posixly; 178 179 #ifdef __dead 180 __dead 181 #endif 182 file_private void usage(void); 183 file_private void docprint(const char *, int); 184 #ifdef __dead 185 __dead 186 #endif 187 file_private void help(void); 188 189 file_private int unwrap(struct magic_set *, const char *); 190 file_private int process(struct magic_set *ms, const char *, int); 191 file_private struct magic_set *load(const char *, int); 192 file_private void setparam(const char *); 193 file_private void applyparam(magic_t); 194 195 196 /* 197 * main - parse arguments and handle options 198 */ 199 int 200 main(int argc, char *argv[]) 201 { 202 int c; 203 size_t i, j, wid, nw; 204 int action = 0, didsomefiles = 0, errflg = 0; 205 int flags = 0, e = 0; 206 #ifdef HAVE_LIBSECCOMP 207 int sandbox = 1; 208 #endif 209 struct magic_set *magic = NULL; 210 int longindex; 211 const char *magicfile = NULL; /* where the magic is */ 212 char *progname; 213 214 /* makes islower etc work for other langs */ 215 (void)setlocale(LC_CTYPE, ""); 216 217 #ifdef __EMX__ 218 /* sh-like wildcard expansion! Shouldn't hurt at least ... */ 219 _wildcard(&argc, &argv); 220 #endif 221 222 if ((progname = strrchr(argv[0], '/')) != NULL) 223 progname++; 224 else 225 progname = argv[0]; 226 227 file_setprogname(progname); 228 229 230 #ifdef S_IFLNK 231 posixly = getenv("POSIXLY_CORRECT") != NULL; 232 flags |= posixly ? MAGIC_SYMLINK : 0; 233 #endif 234 while ((c = getopt_long(argc, argv, OPTSTRING, long_options, 235 &longindex)) != -1) 236 switch (c) { 237 case OPT_HELP: 238 help(); 239 break; 240 case OPT_APPLE: 241 flags |= MAGIC_APPLE; 242 break; 243 case OPT_EXTENSIONS: 244 flags |= MAGIC_EXTENSION; 245 break; 246 case OPT_MIME_TYPE: 247 flags |= MAGIC_MIME_TYPE; 248 break; 249 case OPT_MIME_ENCODING: 250 flags |= MAGIC_MIME_ENCODING; 251 break; 252 case '0': 253 nulsep++; 254 break; 255 case 'b': 256 bflag++; 257 break; 258 case 'c': 259 action = FILE_CHECK; 260 break; 261 case 'C': 262 action = FILE_COMPILE; 263 break; 264 case 'd': 265 flags |= MAGIC_DEBUG|MAGIC_CHECK; 266 break; 267 case 'E': 268 flags |= MAGIC_ERROR; 269 break; 270 case 'e': 271 case OPT_EXCLUDE_QUIET: 272 for (i = 0; i < __arraycount(nv); i++) 273 if (strcmp(nv[i].name, optarg) == 0) 274 break; 275 276 if (i == __arraycount(nv)) { 277 if (c != OPT_EXCLUDE_QUIET) 278 errflg++; 279 } else 280 flags |= nv[i].value; 281 break; 282 283 case 'f': 284 if(action) 285 usage(); 286 if (magic == NULL) 287 if ((magic = load(magicfile, flags)) == NULL) 288 return 1; 289 applyparam(magic); 290 e |= unwrap(magic, optarg); 291 ++didsomefiles; 292 break; 293 case 'F': 294 separator = optarg; 295 break; 296 case 'i': 297 flags |= MAGIC_MIME; 298 break; 299 case 'k': 300 flags |= MAGIC_CONTINUE; 301 break; 302 case 'l': 303 action = FILE_LIST; 304 break; 305 case 'm': 306 magicfile = optarg; 307 break; 308 case 'n': 309 ++nobuffer; 310 break; 311 case 'N': 312 ++nopad; 313 break; 314 #if defined(HAVE_UTIME) || defined(HAVE_UTIMES) 315 case 'p': 316 flags |= MAGIC_PRESERVE_ATIME; 317 break; 318 #endif 319 case 'P': 320 setparam(optarg); 321 break; 322 case 'r': 323 flags |= MAGIC_RAW; 324 break; 325 case 's': 326 flags |= MAGIC_DEVICES; 327 break; 328 case 'S': 329 #ifdef HAVE_LIBSECCOMP 330 sandbox = 0; 331 #endif 332 break; 333 case 'v': 334 if (magicfile == NULL) 335 magicfile = magic_getpath(magicfile, action); 336 (void)fprintf(stdout, "%s-%s\n", file_getprogname(), 337 VERSION); 338 (void)fprintf(stdout, "magic file from %s\n", 339 magicfile); 340 #ifdef HAVE_LIBSECCOMP 341 (void)fprintf(stdout, "seccomp support included\n"); 342 #endif 343 return 0; 344 case 'z': 345 flags |= MAGIC_COMPRESS; 346 break; 347 348 case 'Z': 349 flags |= MAGIC_COMPRESS|MAGIC_COMPRESS_TRANSP; 350 break; 351 #ifdef S_IFLNK 352 case 'L': 353 flags |= MAGIC_SYMLINK; 354 break; 355 case 'h': 356 flags &= ~MAGIC_SYMLINK; 357 break; 358 #endif 359 case '?': 360 default: 361 errflg++; 362 break; 363 } 364 365 if (errflg) { 366 usage(); 367 } 368 if (e) 369 return e; 370 371 #ifdef HAVE_LIBSECCOMP 372 #if 0 373 if (sandbox && enable_sandbox_basic() == -1) 374 #else 375 if (sandbox && enable_sandbox_full() == -1) 376 #endif 377 file_err(EXIT_FAILURE, "SECCOMP initialisation failed"); 378 if (sandbox) 379 flags |= MAGIC_NO_COMPRESS_FORK; 380 #endif /* HAVE_LIBSECCOMP */ 381 382 if (MAGIC_VERSION != magic_version()) 383 file_warnx("Compiled magic version [%d] " 384 "does not match with shared library magic version [%d]\n", 385 MAGIC_VERSION, magic_version()); 386 387 switch(action) { 388 case FILE_CHECK: 389 case FILE_COMPILE: 390 case FILE_LIST: 391 /* 392 * Don't try to check/compile ~/.magic unless we explicitly 393 * ask for it. 394 */ 395 magic = magic_open(flags|MAGIC_CHECK); 396 if (magic == NULL) { 397 file_warn("Can't create magic"); 398 return 1; 399 } 400 401 402 switch(action) { 403 case FILE_CHECK: 404 c = magic_check(magic, magicfile); 405 break; 406 case FILE_COMPILE: 407 c = magic_compile(magic, magicfile); 408 break; 409 case FILE_LIST: 410 c = magic_list(magic, magicfile); 411 break; 412 default: 413 abort(); 414 } 415 if (c == -1) { 416 file_warnx("%s", magic_error(magic)); 417 e = 1; 418 goto out; 419 } 420 goto out; 421 default: 422 if (magic == NULL) 423 if ((magic = load(magicfile, flags)) == NULL) 424 return 1; 425 applyparam(magic); 426 } 427 428 if (optind == argc) { 429 if (!didsomefiles) 430 usage(); 431 goto out; 432 } 433 434 for (wid = 0, j = CAST(size_t, optind); j < CAST(size_t, argc); 435 j++) { 436 nw = file_mbswidth(magic, argv[j]); 437 if (nw > wid) 438 wid = nw; 439 } 440 441 /* 442 * If bflag is only set twice, set it depending on 443 * number of files [this is undocumented, and subject to change] 444 */ 445 if (bflag == 2) { 446 bflag = optind >= argc - 1; 447 } 448 for (; optind < argc; optind++) 449 e |= process(magic, argv[optind], wid); 450 451 out: 452 if (!nobuffer) 453 e |= fflush(stdout) != 0; 454 455 if (magic) 456 magic_close(magic); 457 return e; 458 } 459 460 file_private void 461 applyparam(magic_t magic) 462 { 463 size_t i; 464 465 for (i = 0; i < __arraycount(pm); i++) { 466 if (!pm[i].set) 467 continue; 468 if (magic_setparam(magic, pm[i].tag, &pm[i].value) == -1) 469 file_err(EXIT_FAILURE, "Can't set %s", pm[i].name); 470 } 471 } 472 473 file_private void 474 setparam(const char *p) 475 { 476 size_t i; 477 char *s; 478 479 if ((s = CCAST(char *, strchr(p, '='))) == NULL) 480 goto badparm; 481 482 for (i = 0; i < __arraycount(pm); i++) { 483 if (strncmp(p, pm[i].name, s - p) != 0) 484 continue; 485 pm[i].value = atoi(s + 1); 486 pm[i].set = 1; 487 return; 488 } 489 badparm: 490 file_errx(EXIT_FAILURE, "Unknown param %s", p); 491 } 492 493 file_private struct magic_set * 494 /*ARGSUSED*/ 495 load(const char *magicfile, int flags) 496 { 497 struct magic_set *magic = magic_open(flags); 498 const char *e; 499 500 if (magic == NULL) { 501 file_warn("Can't create magic"); 502 return NULL; 503 } 504 if (magic_load(magic, magicfile) == -1) { 505 file_warn("%s", magic_error(magic)); 506 magic_close(magic); 507 return NULL; 508 } 509 if ((e = magic_error(magic)) != NULL) 510 file_warn("%s", e); 511 return magic; 512 } 513 514 /* 515 * unwrap -- read a file of filenames, do each one. 516 */ 517 file_private int 518 unwrap(struct magic_set *ms, const char *fn) 519 { 520 FILE *f; 521 ssize_t len; 522 char *line = NULL; 523 size_t llen = 0; 524 int wid = 0, cwid; 525 int e = 0; 526 size_t fi = 0, fimax = 0; 527 char **flist = NULL; 528 529 if (strcmp("-", fn) == 0) 530 f = stdin; 531 else { 532 if ((f = fopen(fn, "r")) == NULL) { 533 file_warn("Cannot open `%s'", fn); 534 return 1; 535 } 536 } 537 538 while ((len = getline(&line, &llen, f)) > 0) { 539 if (line[len - 1] == '\n') 540 line[len - 1] = '\0'; 541 cwid = file_mbswidth(ms, line); 542 if (nobuffer) { 543 e |= process(ms, line, cwid); 544 free(line); 545 line = NULL; 546 llen = 0; 547 continue; 548 } 549 if (cwid > wid) 550 wid = cwid; 551 if (fi >= fimax) { 552 fimax += 100; 553 char **nf = CAST(char **, 554 realloc(flist, fimax * sizeof(*flist))); 555 if (nf == NULL) { 556 file_err(EXIT_FAILURE, 557 "Cannot allocate memory for file list"); 558 } 559 flist = nf; 560 } 561 flist[fi++] = line; 562 line = NULL; 563 llen = 0; 564 } 565 566 if (!nobuffer) { 567 fimax = fi; 568 for (fi = 0; fi < fimax; fi++) { 569 e |= process(ms, flist[fi], wid); 570 free(flist[fi]); 571 } 572 } 573 free(flist); 574 575 if (f != stdin) 576 (void)fclose(f); 577 return e; 578 } 579 580 file_private void 581 file_octal(unsigned char c) 582 { 583 (void)putc('\\', stdout); 584 (void)putc(((c >> 6) & 7) + '0', stdout); 585 (void)putc(((c >> 3) & 7) + '0', stdout); 586 (void)putc(((c >> 0) & 7) + '0', stdout); 587 } 588 589 file_private void 590 fname_print(const char *inname) 591 { 592 size_t n = strlen(inname); 593 #ifdef FILE_WIDE_SUPPORT 594 mbstate_t state; 595 wchar_t nextchar; 596 size_t bytesconsumed; 597 598 599 (void)memset(&state, 0, sizeof(state)); 600 while (n > 0) { 601 bytesconsumed = mbrtowc(&nextchar, inname, n, &state); 602 if (bytesconsumed == CAST(size_t, -1) || 603 bytesconsumed == CAST(size_t, -2)) { 604 nextchar = *inname++; 605 n--; 606 (void)memset(&state, 0, sizeof(state)); 607 file_octal(CAST(unsigned char, nextchar)); 608 continue; 609 } 610 inname += bytesconsumed; 611 n -= bytesconsumed; 612 if (iswprint(nextchar)) { 613 printf("%lc", (wint_t)nextchar); 614 continue; 615 } 616 /* XXX: What if it is > 255? */ 617 file_octal(CAST(unsigned char, nextchar)); 618 } 619 #else 620 size_t i; 621 for (i = 0; i < n; i++) { 622 unsigned char c = CAST(unsigned char, inname[i]); 623 if (isprint(c)) { 624 (void)putc(c, stdout); 625 continue; 626 } 627 file_octal(c); 628 } 629 #endif 630 } 631 632 /* 633 * Called for each input file on the command line (or in a list of files) 634 */ 635 file_private int 636 process(struct magic_set *ms, const char *inname, int wid) 637 { 638 const char *type, c = nulsep > 1 ? '\0' : '\n'; 639 int std_in = strcmp(inname, "-") == 0; 640 int haderror = 0; 641 642 if (wid > 0 && !bflag) { 643 const char *pname = std_in ? "/dev/stdin" : inname; 644 if ((ms->flags & MAGIC_RAW) == 0) 645 fname_print(pname); 646 else 647 (void)printf("%s", pname); 648 if (nulsep) 649 (void)putc('\0', stdout); 650 if (nulsep < 2) { 651 (void)printf("%s", separator); 652 (void)printf("%*s ", CAST(int, nopad ? 0 653 : (wid - file_mbswidth(ms, inname))), ""); 654 } 655 } 656 657 type = magic_file(ms, std_in ? NULL : inname); 658 659 if (type == NULL) { 660 haderror |= printf("ERROR: %s%c", magic_error(ms), c); 661 } else { 662 haderror |= printf("%s%c", type, c) < 0; 663 } 664 if (nobuffer) 665 haderror |= fflush(stdout) != 0; 666 return haderror || type == NULL; 667 } 668 669 file_protected size_t 670 file_mbswidth(struct magic_set *ms, const char *s) 671 { 672 size_t width = 0; 673 #ifdef FILE_WIDE_SUPPORT 674 size_t bytesconsumed, n; 675 mbstate_t state; 676 wchar_t nextchar; 677 678 (void)memset(&state, 0, sizeof(state)); 679 n = strlen(s); 680 681 while (n > 0) { 682 bytesconsumed = mbrtowc(&nextchar, s, n, &state); 683 if (bytesconsumed == CAST(size_t, -1) || 684 bytesconsumed == CAST(size_t, -2)) { 685 nextchar = *s; 686 bytesconsumed = 1; 687 (void)memset(&state, 0, sizeof(state)); 688 width += 4; 689 } else { 690 int w = wcwidth(nextchar); 691 width += ((ms->flags & MAGIC_RAW) != 0 692 || iswprint(nextchar)) ? (w > 0 ? w : 1) : 4; 693 } 694 695 s += bytesconsumed, n -= bytesconsumed; 696 } 697 #else 698 for (; *s; s++) { 699 width += (ms->flags & MAGIC_RAW) != 0 700 || isprint(CAST(unsigned char, *s)) ? 1 : 4; 701 } 702 #endif 703 return width; 704 } 705 706 file_private void 707 usage(void) 708 { 709 const char *pn = file_getprogname(); 710 (void)fprintf(stderr, USAGE, pn, pn, pn); 711 exit(EXIT_FAILURE); 712 } 713 714 file_private void 715 defprint(int def) 716 { 717 if (!def) 718 return; 719 if (((def & 1) && posixly) || ((def & 2) && !posixly)) 720 (void)fprintf(stdout, " (default)"); 721 (void)putc('\n', stdout); 722 } 723 724 file_private void 725 docprint(const char *opts, int def) 726 { 727 size_t i; 728 int comma, pad; 729 char *sp, *p; 730 731 p = CCAST(char *, strchr(opts, '%')); 732 if (p == NULL) { 733 (void)fprintf(stdout, "%s", opts); 734 defprint(def); 735 return; 736 } 737 738 for (sp = p - 1; sp > opts && *sp == ' '; sp--) 739 continue; 740 741 (void)printf("%.*s", CAST(int, p - opts), opts); 742 pad = (int)CAST(int, p - sp - 1); 743 744 switch (*++p) { 745 case 'e': 746 comma = 0; 747 for (i = 0; i < __arraycount(nv); i++) { 748 (void)printf("%s%s", comma++ ? ", " : "", nv[i].name); 749 if (i && i % 5 == 0 && i != __arraycount(nv) - 1) { 750 (void)printf(",\n%*s", pad, ""); 751 comma = 0; 752 } 753 } 754 break; 755 case 'P': 756 for (i = 0; i < __arraycount(pm); i++) { 757 (void)printf("%9s %7zu %s", pm[i].name, pm[i].def, 758 pm[i].desc); 759 if (i != __arraycount(pm) - 1) 760 (void)printf("\n%*s", pad, ""); 761 } 762 break; 763 default: 764 file_errx(EXIT_FAILURE, "Unknown escape `%c' in long options", 765 *p); 766 break; 767 } 768 (void)printf("%s", opts + (p - opts) + 1); 769 770 } 771 772 file_private void 773 help(void) 774 { 775 (void)fputs( 776 "Usage: file [OPTION...] [FILE...]\n" 777 "Determine type of FILEs.\n" 778 "\n", stdout); 779 #define OPT(shortname, longname, opt, def, doc) \ 780 (void)printf(" -%c, --" longname, shortname), \ 781 docprint(doc, def); 782 #define OPT_LONGONLY(longname, opt, def, doc, id) \ 783 (void)printf(" --" longname), \ 784 docprint(doc, def); 785 #include "file_opts.h" 786 #undef OPT 787 #undef OPT_LONGONLY 788 (void)printf("\nReport bugs to https://bugs.astron.com/\n"); 789 exit(EXIT_SUCCESS); 790 } 791 792 file_private const char *file_progname; 793 794 file_protected void 795 file_setprogname(const char *progname) 796 { 797 file_progname = progname; 798 } 799 800 file_protected const char * 801 file_getprogname(void) 802 { 803 return file_progname; 804 } 805 806 file_protected void 807 file_err(int e, const char *fmt, ...) 808 { 809 va_list ap; 810 int se = errno; 811 812 va_start(ap, fmt); 813 (void)fprintf(stderr, "%s: ", file_progname); 814 (void)vfprintf(stderr, fmt, ap); 815 va_end(ap); 816 if (se) 817 (void)fprintf(stderr, " (%s)\n", strerror(se)); 818 else 819 fputc('\n', stderr); 820 exit(e); 821 } 822 823 file_protected void 824 file_errx(int e, const char *fmt, ...) 825 { 826 va_list ap; 827 828 va_start(ap, fmt); 829 (void)fprintf(stderr, "%s: ", file_progname); 830 (void)vfprintf(stderr, fmt, ap); 831 va_end(ap); 832 (void)fprintf(stderr, "\n"); 833 exit(e); 834 } 835 836 file_protected void 837 file_warn(const char *fmt, ...) 838 { 839 va_list ap; 840 int se = errno; 841 842 va_start(ap, fmt); 843 (void)fprintf(stderr, "%s: ", file_progname); 844 (void)vfprintf(stderr, fmt, ap); 845 va_end(ap); 846 if (se) 847 (void)fprintf(stderr, " (%s)\n", strerror(se)); 848 else 849 fputc('\n', stderr); 850 errno = se; 851 } 852 853 file_protected void 854 file_warnx(const char *fmt, ...) 855 { 856 va_list ap; 857 int se = errno; 858 859 va_start(ap, fmt); 860 (void)fprintf(stderr, "%s: ", file_progname); 861 (void)vfprintf(stderr, fmt, ap); 862 va_end(ap); 863 (void)fprintf(stderr, "\n"); 864 errno = se; 865 } 866