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.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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
29 * file - find type of a file or files - main program.
35 FILE_RCSID("@(#)$File: file.c,v 1.153 2014/02/11 15:41:04 christos Exp $")
44 # if (__COHERENT__ >= 0x420)
45 # include <sys/utime.h>
48 # include <sys/time.h>
55 #include <unistd.h> /* for read() */
64 #if defined(HAVE_GETOPT_H) && defined(HAVE_STRUCT_OPTION)
66 #ifndef HAVE_GETOPT_LONG
67 int getopt_long(int argc, char * const *argv, const char *optstring, const struct option *longopts, int *longindex);
74 #define FILE_FLAGS "-bcEhikLlNnprsvz0"
76 #define FILE_FLAGS "-bcEiklNnprsvz0"
80 "Usage: %s [" FILE_FLAGS \
81 "] [--apple] [--mime-encoding] [--mime-type]\n" \
82 " [-e testname] [-F separator] [-f namefile] [-m magicfiles] " \
84 " %s -C [-m magicfiles]\n" \
87 private int /* Global command-line options */
88 bflag = 0, /* brief output format */
89 nopad = 0, /* Don't pad output */
90 nobuffer = 0, /* Do not buffer stdout */
91 nulsep = 0; /* Append '\0' to the separator */
93 private const char *separator = ":"; /* Default field separator */
94 private const struct option long_options[] = {
95 #define OPT(shortname, longname, opt, doc) \
96 {longname, opt, NULL, shortname},
97 #define OPT_LONGONLY(longname, opt, doc) \
98 {longname, opt, NULL, 0},
99 #include "file_opts.h"
104 #define OPTSTRING "bcCde:Ef:F:hiklLm:nNprsvz0"
106 private const struct {
110 { "apptype", MAGIC_NO_CHECK_APPTYPE },
111 { "ascii", MAGIC_NO_CHECK_ASCII },
112 { "cdf", MAGIC_NO_CHECK_CDF },
113 { "compress", MAGIC_NO_CHECK_COMPRESS },
114 { "elf", MAGIC_NO_CHECK_ELF },
115 { "encoding", MAGIC_NO_CHECK_ENCODING },
116 { "soft", MAGIC_NO_CHECK_SOFT },
117 { "tar", MAGIC_NO_CHECK_TAR },
118 { "text", MAGIC_NO_CHECK_TEXT }, /* synonym for ascii */
119 { "tokens", MAGIC_NO_CHECK_TOKENS }, /* OBSOLETE: ignored for backwards compatibility */
122 private char *progname; /* used throughout */
124 private void usage(void);
125 private void docprint(const char *);
126 private void help(void);
128 private int unwrap(struct magic_set *, const char *);
129 private int process(struct magic_set *ms, const char *, int);
130 private struct magic_set *load(const char *, int);
134 * main - parse arguments and handle options
137 main(int argc, char *argv[])
141 int action = 0, didsomefiles = 0, errflg = 0;
142 int flags = 0, e = 0;
143 struct magic_set *magic = NULL;
145 const char *magicfile = NULL; /* where the magic is */
147 /* makes islower etc work for other langs */
148 (void)setlocale(LC_CTYPE, "");
151 /* sh-like wildcard expansion! Shouldn't hurt at least ... */
152 _wildcard(&argc, &argv);
155 if ((progname = strrchr(argv[0], '/')) != NULL)
161 flags |= getenv("POSIXLY_CORRECT") ? MAGIC_SYMLINK : 0;
163 while ((c = getopt_long(argc, argv, OPTSTRING, long_options,
172 flags |= MAGIC_APPLE;
175 flags |= MAGIC_MIME_TYPE;
178 flags |= MAGIC_MIME_ENCODING;
192 action = FILE_COMPILE;
195 flags |= MAGIC_DEBUG|MAGIC_CHECK;
198 flags |= MAGIC_ERROR;
201 for (i = 0; i < sizeof(nv) / sizeof(nv[0]); i++)
202 if (strcmp(nv[i].name, optarg) == 0)
205 if (i == sizeof(nv) / sizeof(nv[0]))
208 flags |= nv[i].value;
215 if ((magic = load(magicfile, flags)) == NULL)
217 e |= unwrap(magic, optarg);
227 flags |= MAGIC_CONTINUE;
241 #if defined(HAVE_UTIME) || defined(HAVE_UTIMES)
243 flags |= MAGIC_PRESERVE_ATIME;
250 flags |= MAGIC_DEVICES;
253 if (magicfile == NULL)
254 magicfile = magic_getpath(magicfile, action);
255 (void)fprintf(stdout, "%s-%s\n", progname, VERSION);
256 (void)fprintf(stdout, "magic file from %s\n",
260 flags |= MAGIC_COMPRESS;
264 flags |= MAGIC_SYMLINK;
267 flags &= ~MAGIC_SYMLINK;
282 if (MAGIC_VERSION != magic_version())
283 (void)fprintf(stderr, "%s: compiled magic version [%d] "
284 "does not match with shared library magic version [%d]\n",
285 progname, MAGIC_VERSION, magic_version());
292 * Don't try to check/compile ~/.magic unless we explicitly
295 magic = magic_open(flags|MAGIC_CHECK);
297 (void)fprintf(stderr, "%s: %s\n", progname,
303 c = magic_check(magic, magicfile);
306 c = magic_compile(magic, magicfile);
309 c = magic_list(magic, magicfile);
315 (void)fprintf(stderr, "%s: %s\n", progname,
322 if ((magic = load(magicfile, flags)) == NULL)
327 if (optind == argc) {
333 for (wid = 0, j = (size_t)optind; j < (size_t)argc; j++) {
334 nw = file_mbswidth(argv[j]);
339 * If bflag is only set twice, set it depending on
340 * number of files [this is undocumented, and subject to change]
343 bflag = optind >= argc - 1;
345 for (; optind < argc; optind++)
346 e |= process(magic, argv[optind], wid);
355 private struct magic_set *
357 load(const char *magicfile, int flags)
359 struct magic_set *magic = magic_open(flags);
361 (void)fprintf(stderr, "%s: %s\n", progname, strerror(errno));
364 if (magic_load(magic, magicfile) == -1) {
365 (void)fprintf(stderr, "%s: %s\n",
366 progname, magic_error(magic));
374 * unwrap -- read a file of filenames, do each one.
377 unwrap(struct magic_set *ms, const char *fn)
386 if (strcmp("-", fn) == 0) {
390 if ((f = fopen(fn, "r")) == NULL) {
391 (void)fprintf(stderr, "%s: Cannot open `%s' (%s).\n",
392 progname, fn, strerror(errno));
396 while ((len = getline(&line, &llen, f)) > 0) {
397 if (line[len - 1] == '\n')
398 line[len - 1] = '\0';
399 cwid = file_mbswidth(line);
407 while ((len = getline(&line, &llen, f)) > 0) {
408 if (line[len - 1] == '\n')
409 line[len - 1] = '\0';
410 e |= process(ms, line, wid);
412 (void)fflush(stdout);
421 * Called for each input file on the command line (or in a list of files)
424 process(struct magic_set *ms, const char *inname, int wid)
427 int std_in = strcmp(inname, "-") == 0;
429 if (wid > 0 && !bflag) {
430 (void)printf("%s", std_in ? "/dev/stdin" : inname);
432 (void)putc('\0', stdout);
433 (void)printf("%s", separator);
435 (int) (nopad ? 0 : (wid - file_mbswidth(inname))), "");
438 type = magic_file(ms, std_in ? NULL : inname);
440 (void)printf("ERROR: %s\n", magic_error(ms));
443 (void)printf("%s\n", type);
449 file_mbswidth(const char *s)
451 #if defined(HAVE_WCHAR_H) && defined(HAVE_MBRTOWC) && defined(HAVE_WCWIDTH)
452 size_t bytesconsumed, old_n, n, width = 0;
455 (void)memset(&state, 0, sizeof(mbstate_t));
456 old_n = n = strlen(s);
459 bytesconsumed = mbrtowc(&nextchar, s, n, &state);
460 if (bytesconsumed == (size_t)(-1) ||
461 bytesconsumed == (size_t)(-2)) {
462 /* Something went wrong, return something reasonable */
467 * do what strlen() would do, so that caller
472 int w = wcwidth(nextchar);
477 s += bytesconsumed, n -= bytesconsumed;
488 (void)fprintf(stderr, USAGE, progname, progname, progname);
493 docprint(const char *opts)
499 p = strstr(opts, "%o");
501 fprintf(stdout, "%s", opts);
505 for (sp = p - 1; sp > opts && *sp == ' '; sp--)
508 fprintf(stdout, "%.*s", (int)(p - opts), opts);
511 for (i = 0; i < __arraycount(nv); i++) {
512 fprintf(stdout, "%s%s", comma++ ? ", " : "", nv[i].name);
513 if (i && i % 5 == 0) {
514 fprintf(stdout, ",\n%*s", (int)(p - sp - 1), "");
519 fprintf(stdout, "%s", opts + (p - opts) + 2);
526 "Usage: file [OPTION...] [FILE...]\n"
527 "Determine type of FILEs.\n"
529 #define OPT(shortname, longname, opt, doc) \
530 fprintf(stdout, " -%c, --" longname, shortname), \
532 #define OPT_LONGONLY(longname, opt, doc) \
533 fprintf(stdout, " --" longname), \
535 #include "file_opts.h"
538 fprintf(stdout, "\nReport bugs to http://bugs.gw.com/\n");