1 /* $NetBSD: file.c,v 1.17 2022/09/24 20:21:46 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 1.205 2022/09/15 16:54:14 christos Exp $")
39 #else
40 __RCSID("$NetBSD: file.c,v 1.17 2022/09/24 20:21:46 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 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 private const char *separator = ":"; /* Default field separator */
113 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 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 { "text", MAGIC_NO_CHECK_TEXT }, /* synonym for ascii */
145 { "tokens", MAGIC_NO_CHECK_TOKENS }, /* OBSOLETE: ignored for backwards compatibility */
146 };
147
148 private struct {
149 const char *name;
150 size_t value;
151 size_t def;
152 const char *desc;
153 int tag;
154 int set;
155 } pm[] = {
156 { "bytes", 0, FILE_BYTES_MAX, "max bytes to look inside file",
157 MAGIC_PARAM_BYTES_MAX, 0 },
158 { "elf_notes", 0, FILE_ELF_NOTES_MAX, "max ELF notes processed",
159 MAGIC_PARAM_ELF_NOTES_MAX, 0 },
160 { "elf_phnum", 0, FILE_ELF_PHNUM_MAX, "max ELF prog sections processed",
161 MAGIC_PARAM_ELF_PHNUM_MAX, 0 },
162 { "elf_shnum", 0, FILE_ELF_SHNUM_MAX, "max ELF sections processed",
163 MAGIC_PARAM_ELF_SHNUM_MAX, 0 },
164 { "encoding", 0, FILE_ENCODING_MAX, "max bytes to scan for encoding",
165 MAGIC_PARAM_ENCODING_MAX, 0 },
166 { "indir", 0, FILE_INDIR_MAX, "recursion limit for indirection",
167 MAGIC_PARAM_INDIR_MAX, 0 },
168 { "name", 0, FILE_NAME_MAX, "use limit for name/use magic",
169 MAGIC_PARAM_NAME_MAX, 0 },
170 { "regex", 0, FILE_REGEX_MAX, "length limit for REGEX searches",
171 MAGIC_PARAM_REGEX_MAX, 0 },
172 };
173
174 private int posixly;
175
176 #ifdef __dead
177 __dead
178 #endif
179 private void usage(void);
180 private void docprint(const char *, int);
181 #ifdef __dead
182 __dead
183 #endif
184 private void help(void);
185
186 private int unwrap(struct magic_set *, const char *);
187 private int process(struct magic_set *ms, const char *, int);
188 private struct magic_set *load(const char *, int);
189 private void setparam(const char *);
190 private void applyparam(magic_t);
191
192
193 /*
194 * main - parse arguments and handle options
195 */
196 int
main(int argc,char * argv[])197 main(int argc, char *argv[])
198 {
199 int c;
200 size_t i, j, wid, nw;
201 int action = 0, didsomefiles = 0, errflg = 0;
202 int flags = 0, e = 0;
203 #ifdef HAVE_LIBSECCOMP
204 int sandbox = 1;
205 #endif
206 struct magic_set *magic = NULL;
207 int longindex;
208 const char *magicfile = NULL; /* where the magic is */
209 char *progname;
210
211 /* makes islower etc work for other langs */
212 (void)setlocale(LC_CTYPE, "");
213
214 #ifdef __EMX__
215 /* sh-like wildcard expansion! Shouldn't hurt at least ... */
216 _wildcard(&argc, &argv);
217 #endif
218
219 if ((progname = strrchr(argv[0], '/')) != NULL)
220 progname++;
221 else
222 progname = argv[0];
223
224 file_setprogname(progname);
225
226
227 #ifdef S_IFLNK
228 posixly = getenv("POSIXLY_CORRECT") != NULL;
229 flags |= posixly ? MAGIC_SYMLINK : 0;
230 #endif
231 while ((c = getopt_long(argc, argv, OPTSTRING, long_options,
232 &longindex)) != -1)
233 switch (c) {
234 case OPT_HELP:
235 help();
236 break;
237 case OPT_APPLE:
238 flags |= MAGIC_APPLE;
239 break;
240 case OPT_EXTENSIONS:
241 flags |= MAGIC_EXTENSION;
242 break;
243 case OPT_MIME_TYPE:
244 flags |= MAGIC_MIME_TYPE;
245 break;
246 case OPT_MIME_ENCODING:
247 flags |= MAGIC_MIME_ENCODING;
248 break;
249 case '0':
250 nulsep++;
251 break;
252 case 'b':
253 bflag++;
254 break;
255 case 'c':
256 action = FILE_CHECK;
257 break;
258 case 'C':
259 action = FILE_COMPILE;
260 break;
261 case 'd':
262 flags |= MAGIC_DEBUG|MAGIC_CHECK;
263 break;
264 case 'E':
265 flags |= MAGIC_ERROR;
266 break;
267 case 'e':
268 case OPT_EXCLUDE_QUIET:
269 for (i = 0; i < __arraycount(nv); i++)
270 if (strcmp(nv[i].name, optarg) == 0)
271 break;
272
273 if (i == __arraycount(nv)) {
274 if (c != OPT_EXCLUDE_QUIET)
275 errflg++;
276 } else
277 flags |= nv[i].value;
278 break;
279
280 case 'f':
281 if(action)
282 usage();
283 if (magic == NULL)
284 if ((magic = load(magicfile, flags)) == NULL)
285 return 1;
286 applyparam(magic);
287 e |= unwrap(magic, optarg);
288 ++didsomefiles;
289 break;
290 case 'F':
291 separator = optarg;
292 break;
293 case 'i':
294 flags |= MAGIC_MIME;
295 break;
296 case 'k':
297 flags |= MAGIC_CONTINUE;
298 break;
299 case 'l':
300 action = FILE_LIST;
301 break;
302 case 'm':
303 magicfile = optarg;
304 break;
305 case 'n':
306 ++nobuffer;
307 break;
308 case 'N':
309 ++nopad;
310 break;
311 #if defined(HAVE_UTIME) || defined(HAVE_UTIMES)
312 case 'p':
313 flags |= MAGIC_PRESERVE_ATIME;
314 break;
315 #endif
316 case 'P':
317 setparam(optarg);
318 break;
319 case 'r':
320 flags |= MAGIC_RAW;
321 break;
322 case 's':
323 flags |= MAGIC_DEVICES;
324 break;
325 case 'S':
326 #ifdef HAVE_LIBSECCOMP
327 sandbox = 0;
328 #endif
329 break;
330 case 'v':
331 if (magicfile == NULL)
332 magicfile = magic_getpath(magicfile, action);
333 (void)fprintf(stdout, "%s-%s\n", file_getprogname(),
334 VERSION);
335 (void)fprintf(stdout, "magic file from %s\n",
336 magicfile);
337 #ifdef HAVE_LIBSECCOMP
338 (void)fprintf(stdout, "seccomp support included\n");
339 #endif
340 return 0;
341 case 'z':
342 flags |= MAGIC_COMPRESS;
343 break;
344
345 case 'Z':
346 flags |= MAGIC_COMPRESS|MAGIC_COMPRESS_TRANSP;
347 break;
348 #ifdef S_IFLNK
349 case 'L':
350 flags |= MAGIC_SYMLINK;
351 break;
352 case 'h':
353 flags &= ~MAGIC_SYMLINK;
354 break;
355 #endif
356 case '?':
357 default:
358 errflg++;
359 break;
360 }
361
362 if (errflg) {
363 usage();
364 }
365 if (e)
366 return e;
367
368 #ifdef HAVE_LIBSECCOMP
369 #if 0
370 if (sandbox && enable_sandbox_basic() == -1)
371 #else
372 if (sandbox && enable_sandbox_full() == -1)
373 #endif
374 file_err(EXIT_FAILURE, "SECCOMP initialisation failed");
375 if (sandbox)
376 flags |= MAGIC_NO_COMPRESS_FORK;
377 #endif /* HAVE_LIBSECCOMP */
378
379 if (MAGIC_VERSION != magic_version())
380 file_warnx("Compiled magic version [%d] "
381 "does not match with shared library magic version [%d]\n",
382 MAGIC_VERSION, magic_version());
383
384 switch(action) {
385 case FILE_CHECK:
386 case FILE_COMPILE:
387 case FILE_LIST:
388 /*
389 * Don't try to check/compile ~/.magic unless we explicitly
390 * ask for it.
391 */
392 magic = magic_open(flags|MAGIC_CHECK);
393 if (magic == NULL) {
394 file_warn("Can't create magic");
395 return 1;
396 }
397
398
399 switch(action) {
400 case FILE_CHECK:
401 c = magic_check(magic, magicfile);
402 break;
403 case FILE_COMPILE:
404 c = magic_compile(magic, magicfile);
405 break;
406 case FILE_LIST:
407 c = magic_list(magic, magicfile);
408 break;
409 default:
410 abort();
411 }
412 if (c == -1) {
413 file_warnx("%s", magic_error(magic));
414 e = 1;
415 goto out;
416 }
417 goto out;
418 default:
419 if (magic == NULL)
420 if ((magic = load(magicfile, flags)) == NULL)
421 return 1;
422 applyparam(magic);
423 }
424
425 if (optind == argc) {
426 if (!didsomefiles)
427 usage();
428 goto out;
429 }
430
431 for (wid = 0, j = CAST(size_t, optind); j < CAST(size_t, argc);
432 j++) {
433 nw = file_mbswidth(magic, argv[j]);
434 if (nw > wid)
435 wid = nw;
436 }
437
438 /*
439 * If bflag is only set twice, set it depending on
440 * number of files [this is undocumented, and subject to change]
441 */
442 if (bflag == 2) {
443 bflag = optind >= argc - 1;
444 }
445 for (; optind < argc; optind++)
446 e |= process(magic, argv[optind], wid);
447
448 out:
449 if (!nobuffer)
450 e |= fflush(stdout) != 0;
451
452 if (magic)
453 magic_close(magic);
454 return e;
455 }
456
457 private void
applyparam(magic_t magic)458 applyparam(magic_t magic)
459 {
460 size_t i;
461
462 for (i = 0; i < __arraycount(pm); i++) {
463 if (!pm[i].set)
464 continue;
465 if (magic_setparam(magic, pm[i].tag, &pm[i].value) == -1)
466 file_err(EXIT_FAILURE, "Can't set %s", pm[i].name);
467 }
468 }
469
470 private void
setparam(const char * p)471 setparam(const char *p)
472 {
473 size_t i;
474 char *s;
475
476 if ((s = CCAST(char *, strchr(p, '='))) == NULL)
477 goto badparm;
478
479 for (i = 0; i < __arraycount(pm); i++) {
480 if (strncmp(p, pm[i].name, s - p) != 0)
481 continue;
482 pm[i].value = atoi(s + 1);
483 pm[i].set = 1;
484 return;
485 }
486 badparm:
487 file_errx(EXIT_FAILURE, "Unknown param %s", p);
488 }
489
490 private struct magic_set *
491 /*ARGSUSED*/
load(const char * magicfile,int flags)492 load(const char *magicfile, int flags)
493 {
494 struct magic_set *magic = magic_open(flags);
495 const char *e;
496
497 if (magic == NULL) {
498 file_warn("Can't create magic");
499 return NULL;
500 }
501 if (magic_load(magic, magicfile) == -1) {
502 file_warn("%s", magic_error(magic));
503 magic_close(magic);
504 return NULL;
505 }
506 if ((e = magic_error(magic)) != NULL)
507 file_warn("%s", e);
508 return magic;
509 }
510
511 /*
512 * unwrap -- read a file of filenames, do each one.
513 */
514 private int
unwrap(struct magic_set * ms,const char * fn)515 unwrap(struct magic_set *ms, const char *fn)
516 {
517 FILE *f;
518 ssize_t len;
519 char *line = NULL;
520 size_t llen = 0;
521 int wid = 0, cwid;
522 int e = 0;
523 size_t fi = 0, fimax = 100;
524 char **flist = CAST(char **, malloc(sizeof(*flist) * fimax));
525
526 if (flist == NULL)
527 out: file_err(EXIT_FAILURE, "Cannot allocate memory for file list");
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 if (fi >= fimax) {
542 fimax += 100;
543 char **nf = CAST(char **,
544 realloc(flist, fimax * sizeof(*flist)));
545 if (nf == NULL)
546 goto out;
547 flist = nf;
548 }
549 flist[fi++] = line;
550 cwid = file_mbswidth(ms, line);
551 if (cwid > wid)
552 wid = cwid;
553 line = NULL;
554 llen = 0;
555 }
556
557 fimax = fi;
558 for (fi = 0; fi < fimax; fi++) {
559 e |= process(ms, flist[fi], wid);
560 free(flist[fi]);
561 }
562 free(flist);
563
564 if (f != stdin)
565 (void)fclose(f);
566 return e;
567 }
568
569 private void
file_octal(unsigned char c)570 file_octal(unsigned char c)
571 {
572 putc('\\', stdout);
573 putc(((c >> 6) & 7) + '0', stdout);
574 putc(((c >> 3) & 7) + '0', stdout);
575 putc(((c >> 0) & 7) + '0', stdout);
576 }
577
578 private void
fname_print(const char * inname)579 fname_print(const char *inname)
580 {
581 size_t n = strlen(inname);
582 #ifdef FILE_WIDE_SUPPORT
583 mbstate_t state;
584 wchar_t nextchar;
585 size_t bytesconsumed;
586
587
588 (void)memset(&state, 0, sizeof(state));
589 while (n > 0) {
590 bytesconsumed = mbrtowc(&nextchar, inname, n, &state);
591 if (bytesconsumed == CAST(size_t, -1) ||
592 bytesconsumed == CAST(size_t, -2)) {
593 nextchar = *inname++;
594 n--;
595 (void)memset(&state, 0, sizeof(state));
596 file_octal(CAST(unsigned char, nextchar));
597 continue;
598 }
599 inname += bytesconsumed;
600 n -= bytesconsumed;
601 if (iswprint(nextchar)) {
602 printf("%lc", nextchar);
603 continue;
604 }
605 /* XXX: What if it is > 255? */
606 file_octal(CAST(unsigned char, nextchar));
607 }
608 #else
609 size_t i;
610 for (i = 0; i < n; i++) {
611 unsigned char c = CAST(unsigned char, inname[i]);
612 if (isprint(c)) {
613 putc(c);
614 continue;
615 }
616 file_octal(c);
617 }
618 #endif
619 }
620
621 /*
622 * Called for each input file on the command line (or in a list of files)
623 */
624 private int
process(struct magic_set * ms,const char * inname,int wid)625 process(struct magic_set *ms, const char *inname, int wid)
626 {
627 const char *type, c = nulsep > 1 ? '\0' : '\n';
628 int std_in = strcmp(inname, "-") == 0;
629 int haderror = 0;
630
631 if (wid > 0 && !bflag) {
632 const char *pname = std_in ? "/dev/stdin" : inname;
633 if ((ms->flags & MAGIC_RAW) == 0)
634 fname_print(pname);
635 else
636 (void)printf("%s", pname);
637 if (nulsep)
638 (void)putc('\0', stdout);
639 if (nulsep < 2) {
640 (void)printf("%s", separator);
641 (void)printf("%*s ", CAST(int, nopad ? 0
642 : (wid - file_mbswidth(ms, inname))), "");
643 }
644 }
645
646 type = magic_file(ms, std_in ? NULL : inname);
647
648 if (type == NULL) {
649 haderror |= printf("ERROR: %s%c", magic_error(ms), c);
650 } else {
651 haderror |= printf("%s%c", type, c) < 0;
652 }
653 if (nobuffer)
654 haderror |= fflush(stdout) != 0;
655 return haderror || type == NULL;
656 }
657
658 protected size_t
file_mbswidth(struct magic_set * ms,const char * s)659 file_mbswidth(struct magic_set *ms, const char *s)
660 {
661 size_t width = 0;
662 #ifdef FILE_WIDE_SUPPORT
663 size_t bytesconsumed, n;
664 mbstate_t state;
665 wchar_t nextchar;
666
667 (void)memset(&state, 0, sizeof(state));
668 n = strlen(s);
669
670 while (n > 0) {
671 bytesconsumed = mbrtowc(&nextchar, s, n, &state);
672 if (bytesconsumed == CAST(size_t, -1) ||
673 bytesconsumed == CAST(size_t, -2)) {
674 nextchar = *s;
675 bytesconsumed = 1;
676 (void)memset(&state, 0, sizeof(state));
677 width += 4;
678 } else {
679 int w = wcwidth(nextchar);
680 width += ((ms->flags & MAGIC_RAW) != 0
681 || iswprint(nextchar)) ? (w > 0 ? w : 1) : 4;
682 }
683
684 s += bytesconsumed, n -= bytesconsumed;
685 }
686 #else
687 for (; *s; s++) {
688 width += (ms->flags & MAGIC_RAW) != 0
689 || isprint(CAST(unsigned char, *s)) ? 1 : 4;
690 }
691 #endif
692 return width;
693 }
694
695 private void
usage(void)696 usage(void)
697 {
698 const char *pn = file_getprogname();
699 (void)fprintf(stderr, USAGE, pn, pn, pn);
700 exit(EXIT_FAILURE);
701 }
702
703 private void
defprint(int def)704 defprint(int def)
705 {
706 if (!def)
707 return;
708 if (((def & 1) && posixly) || ((def & 2) && !posixly))
709 fprintf(stdout, " (default)");
710 fputc('\n', stdout);
711 }
712
713 private void
docprint(const char * opts,int def)714 docprint(const char *opts, int def)
715 {
716 size_t i;
717 int comma, pad;
718 char *sp, *p;
719
720 p = CCAST(char *, strchr(opts, '%'));
721 if (p == NULL) {
722 fprintf(stdout, "%s", opts);
723 defprint(def);
724 return;
725 }
726
727 for (sp = p - 1; sp > opts && *sp == ' '; sp--)
728 continue;
729
730 fprintf(stdout, "%.*s", CAST(int, p - opts), opts);
731 pad = (int)CAST(int, p - sp - 1);
732
733 switch (*++p) {
734 case 'e':
735 comma = 0;
736 for (i = 0; i < __arraycount(nv); i++) {
737 fprintf(stdout, "%s%s", comma++ ? ", " : "", nv[i].name);
738 if (i && i % 5 == 0 && i != __arraycount(nv) - 1) {
739 fprintf(stdout, ",\n%*s", pad, "");
740 comma = 0;
741 }
742 }
743 break;
744 case 'P':
745 for (i = 0; i < __arraycount(pm); i++) {
746 fprintf(stdout, "%9s %7zu %s", pm[i].name, pm[i].def,
747 pm[i].desc);
748 if (i != __arraycount(pm) - 1)
749 fprintf(stdout, "\n%*s", pad, "");
750 }
751 break;
752 default:
753 file_errx(EXIT_FAILURE, "Unknown escape `%c' in long options",
754 *p);
755 break;
756 }
757 fprintf(stdout, "%s", opts + (p - opts) + 1);
758
759 }
760
761 private void
help(void)762 help(void)
763 {
764 (void)fputs(
765 "Usage: file [OPTION...] [FILE...]\n"
766 "Determine type of FILEs.\n"
767 "\n", stdout);
768 #define OPT(shortname, longname, opt, def, doc) \
769 fprintf(stdout, " -%c, --" longname, shortname), \
770 docprint(doc, def);
771 #define OPT_LONGONLY(longname, opt, def, doc, id) \
772 fprintf(stdout, " --" longname), \
773 docprint(doc, def);
774 #include "file_opts.h"
775 #undef OPT
776 #undef OPT_LONGONLY
777 fprintf(stdout, "\nReport bugs to https://bugs.astron.com/\n");
778 exit(EXIT_SUCCESS);
779 }
780
781 private const char *file_progname;
782
783 protected void
file_setprogname(const char * progname)784 file_setprogname(const char *progname)
785 {
786 file_progname = progname;
787 }
788
789 protected const char *
file_getprogname(void)790 file_getprogname(void)
791 {
792 return file_progname;
793 }
794
795 protected void
file_err(int e,const char * fmt,...)796 file_err(int e, const char *fmt, ...)
797 {
798 va_list ap;
799 int se = errno;
800
801 va_start(ap, fmt);
802 fprintf(stderr, "%s: ", file_progname);
803 vfprintf(stderr, fmt, ap);
804 va_end(ap);
805 if (se)
806 fprintf(stderr, " (%s)\n", strerror(se));
807 else
808 fputc('\n', stderr);
809 exit(e);
810 }
811
812 protected void
file_errx(int e,const char * fmt,...)813 file_errx(int e, const char *fmt, ...)
814 {
815 va_list ap;
816
817 va_start(ap, fmt);
818 fprintf(stderr, "%s: ", file_progname);
819 vfprintf(stderr, fmt, ap);
820 va_end(ap);
821 fprintf(stderr, "\n");
822 exit(e);
823 }
824
825 protected void
file_warn(const char * fmt,...)826 file_warn(const char *fmt, ...)
827 {
828 va_list ap;
829 int se = errno;
830
831 va_start(ap, fmt);
832 fprintf(stderr, "%s: ", file_progname);
833 vfprintf(stderr, fmt, ap);
834 va_end(ap);
835 if (se)
836 fprintf(stderr, " (%s)\n", strerror(se));
837 else
838 fputc('\n', stderr);
839 errno = se;
840 }
841
842 protected void
file_warnx(const char * fmt,...)843 file_warnx(const char *fmt, ...)
844 {
845 va_list ap;
846 int se = errno;
847
848 va_start(ap, fmt);
849 fprintf(stderr, "%s: ", file_progname);
850 vfprintf(stderr, fmt, ap);
851 va_end(ap);
852 fprintf(stderr, "\n");
853 errno = se;
854 }
855