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.h - definitions for file(1) program
30 * @(#)$File: file.h,v 1.152 2014/06/03 19:01:34 christos Exp $
42 #define SIZE_T_FORMAT "I64"
44 #define SIZE_T_FORMAT ""
46 #define INT64_T_FORMAT "I64"
48 #define SIZE_T_FORMAT "z"
49 #define INT64_T_FORMAT "ll"
52 #include <stdio.h> /* Include that here, to make sure __P gets defined */
54 #include <fcntl.h> /* For open and flags */
56 #ifndef __STDC_LIMIT_MACROS
57 #define __STDC_LIMIT_MACROS
61 #ifdef HAVE_INTTYPES_H
66 #include <sys/types.h>
67 #include <sys/param.h>
68 /* Do this here and now, because struct stat gets re-defined on solaris */
72 #define ENABLE_CONDITIONALS
75 #define MAGIC "/etc/magic"
78 #if defined(__EMX__) || defined (WIN32)
84 #define private static
86 #if HAVE_VISIBILITY && !defined(WIN32)
87 #define public __attribute__ ((__visibility__("default")))
89 #define protected __attribute__ ((__visibility__("hidden")))
99 #define __arraycount(a) (sizeof(a) / sizeof(a[0]))
102 #ifndef __GNUC_PREREQ__
104 #define __GNUC_PREREQ__(x, y) \
105 ((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || \
108 #define __GNUC_PREREQ__(x, y) 0
113 #ifndef __attribute__
114 #define __attribute__(a)
119 #define MIN(a,b) (((a) < (b)) ? (a) : (b))
123 #define MAX(a,b) (((a) > (b)) ? (a) : (b))
127 # define HOWMANY (256 * 1024) /* how much of the file to look at */
129 #define MAXMAGIS 8192 /* max entries in any one magic file
131 #define MAXDESC 64 /* max len of text description/MIME type */
132 #define MAXMIME 80 /* max len of text MIME type */
133 #define MAXstring 64 /* max len of "string" types */
135 #define MAGICNO 0xF11E041C
137 #define FILE_MAGICSIZE 248
141 #define FILE_COMPILE 2
149 uint8_t hs[2]; /* 2 bytes of a fixed-endian "short" */
150 uint8_t hl[4]; /* 4 bytes of a fixed-endian "long" */
151 uint8_t hq[8]; /* 8 bytes of a fixed-endian "quad" */
152 char s[MAXstring]; /* the search string or regex pattern */
153 unsigned char us[MAXstring];
160 uint16_t cont_level; /* level of ">" */
162 #define INDIR 0x01 /* if '(...)' appears */
163 #define OFFADD 0x02 /* if '>&' or '>...(&' appears */
164 #define INDIROFFADD 0x04 /* if '>&(' appears */
165 #define UNSIGNED 0x08 /* comparison is unsigned */
166 #define NOSPACE 0x10 /* suppress space character before output */
167 #define BINTEST 0x20 /* test is for a binary type (set only
168 for top-level tests) */
169 #define TEXTTEST 0x40 /* for passing to file_softmagic */
174 uint8_t reln; /* relation (0=eq, '>'=gt, etc) */
175 uint8_t vallen; /* length of string value, if any */
176 uint8_t type; /* comparison type (FILE_*) */
177 uint8_t in_type; /* type of indirection */
178 #define FILE_INVALID 0
181 #define FILE_DEFAULT 3
183 #define FILE_STRING 5
185 #define FILE_BESHORT 7
186 #define FILE_BELONG 8
187 #define FILE_BEDATE 9
188 #define FILE_LESHORT 10
189 #define FILE_LELONG 11
190 #define FILE_LEDATE 12
191 #define FILE_PSTRING 13
192 #define FILE_LDATE 14
193 #define FILE_BELDATE 15
194 #define FILE_LELDATE 16
195 #define FILE_REGEX 17
196 #define FILE_BESTRING16 18
197 #define FILE_LESTRING16 19
198 #define FILE_SEARCH 20
199 #define FILE_MEDATE 21
200 #define FILE_MELDATE 22
201 #define FILE_MELONG 23
203 #define FILE_LEQUAD 25
204 #define FILE_BEQUAD 26
205 #define FILE_QDATE 27
206 #define FILE_LEQDATE 28
207 #define FILE_BEQDATE 29
208 #define FILE_QLDATE 30
209 #define FILE_LEQLDATE 31
210 #define FILE_BEQLDATE 32
211 #define FILE_FLOAT 33
212 #define FILE_BEFLOAT 34
213 #define FILE_LEFLOAT 35
214 #define FILE_DOUBLE 36
215 #define FILE_BEDOUBLE 37
216 #define FILE_LEDOUBLE 38
217 #define FILE_BEID3 39
218 #define FILE_LEID3 40
219 #define FILE_INDIRECT 41
220 #define FILE_QWDATE 42
221 #define FILE_LEQWDATE 43
222 #define FILE_BEQWDATE 44
225 #define FILE_CLEAR 47
226 #define FILE_NAMES_SIZE 48 /* size of array to contain all names */
228 #define IS_STRING(t) \
229 ((t) == FILE_STRING || \
230 (t) == FILE_PSTRING || \
231 (t) == FILE_BESTRING16 || \
232 (t) == FILE_LESTRING16 || \
233 (t) == FILE_REGEX || \
234 (t) == FILE_SEARCH || \
235 (t) == FILE_NAME || \
238 #define FILE_FMT_NONE 0
239 #define FILE_FMT_NUM 1 /* "cduxXi" */
240 #define FILE_FMT_STR 2 /* "s" */
241 #define FILE_FMT_QUAD 3 /* "ll" */
242 #define FILE_FMT_FLOAT 4 /* "eEfFgG" */
243 #define FILE_FMT_DOUBLE 5 /* "eEfFgG" */
246 uint8_t in_op; /* operator for indirection */
247 uint8_t mask_op; /* operator for mask */
248 #ifdef ENABLE_CONDITIONALS
249 uint8_t cond; /* conditional type */
254 #define FILE_FACTOR_OP_PLUS '+'
255 #define FILE_FACTOR_OP_MINUS '-'
256 #define FILE_FACTOR_OP_TIMES '*'
257 #define FILE_FACTOR_OP_DIV '/'
258 #define FILE_FACTOR_OP_NONE '\0'
260 #define FILE_OPS "&|^+-*/%"
265 #define FILE_OPMINUS 4
266 #define FILE_OPMULTIPLY 5
267 #define FILE_OPDIVIDE 6
268 #define FILE_OPMODULO 7
269 #define FILE_OPS_MASK 0x07 /* mask for above ops */
270 #define FILE_UNUSED_1 0x08
271 #define FILE_UNUSED_2 0x10
272 #define FILE_UNUSED_3 0x20
273 #define FILE_OPINVERSE 0x40
274 #define FILE_OPINDIRECT 0x80
276 #ifdef ENABLE_CONDITIONALS
281 #endif /* ENABLE_CONDITIONALS */
284 uint32_t offset; /* offset to magic number */
286 int32_t in_offset; /* offset from indirection */
288 uint32_t lineno; /* line number in magic file */
291 uint64_t _mask; /* for use with numeric and date types */
293 uint32_t _count; /* repeat/line count */
294 uint32_t _flags; /* modifier flags */
295 } _s; /* for use with string types */
297 #define num_mask _u._mask
298 #define str_range _u._s._count
299 #define str_flags _u._s._flags
301 union VALUETYPE value; /* either number or string */
303 char desc[MAXDESC]; /* description */
305 char mimetype[MAXMIME]; /* MIME type */
310 #define BIT(A) (1 << (A))
311 #define STRING_COMPACT_WHITESPACE BIT(0)
312 #define STRING_COMPACT_OPTIONAL_WHITESPACE BIT(1)
313 #define STRING_IGNORE_LOWERCASE BIT(2)
314 #define STRING_IGNORE_UPPERCASE BIT(3)
315 #define REGEX_OFFSET_START BIT(4)
316 #define STRING_TEXTTEST BIT(5)
317 #define STRING_BINTEST BIT(6)
318 #define PSTRING_1_BE BIT(7)
319 #define PSTRING_1_LE BIT(7)
320 #define PSTRING_2_BE BIT(8)
321 #define PSTRING_2_LE BIT(9)
322 #define PSTRING_4_BE BIT(10)
323 #define PSTRING_4_LE BIT(11)
324 #define REGEX_LINE_COUNT BIT(11)
325 #define PSTRING_LEN \
326 (PSTRING_1_BE|PSTRING_2_LE|PSTRING_2_BE|PSTRING_4_LE|PSTRING_4_BE)
327 #define PSTRING_LENGTH_INCLUDES_ITSELF BIT(12)
328 #define STRING_TRIM BIT(13)
329 #define CHAR_COMPACT_WHITESPACE 'W'
330 #define CHAR_COMPACT_OPTIONAL_WHITESPACE 'w'
331 #define CHAR_IGNORE_LOWERCASE 'c'
332 #define CHAR_IGNORE_UPPERCASE 'C'
333 #define CHAR_REGEX_OFFSET_START 's'
334 #define CHAR_TEXTTEST 't'
335 #define CHAR_TRIM 'T'
336 #define CHAR_BINTEST 'b'
337 #define CHAR_PSTRING_1_BE 'B'
338 #define CHAR_PSTRING_1_LE 'B'
339 #define CHAR_PSTRING_2_BE 'H'
340 #define CHAR_PSTRING_2_LE 'h'
341 #define CHAR_PSTRING_4_BE 'L'
342 #define CHAR_PSTRING_4_LE 'l'
343 #define CHAR_PSTRING_LENGTH_INCLUDES_ITSELF 'J'
344 #define STRING_IGNORE_CASE (STRING_IGNORE_LOWERCASE|STRING_IGNORE_UPPERCASE)
345 #define STRING_DEFAULT_RANGE 100
348 /* list of magic entries */
350 struct magic *magic; /* array of magic entries */
351 uint32_t nmagic; /* number of entries in array */
352 void *map; /* internal resources used by entry */
353 struct mlist *next, *prev;
357 #define CAST(T, b) static_cast<T>(b)
358 #define RCAST(T, b) reinterpret_cast<T>(b)
360 #define CAST(T, b) (T)(b)
361 #define RCAST(T, b) (T)(b)
367 #ifdef ENABLE_CONDITIONALS
369 int last_cond; /* used for error checking by parse() */
376 struct mlist *mlist[MAGIC_SETS]; /* list of regular entries */
379 struct level_info *li;
382 char *buf; /* Accumulation buffer */
383 char *pbuf; /* Printable buffer */
387 int flags; /* Control magic tests. */
388 int event_flags; /* Note things that happened. */
389 #define EVENT_HAD_ERR 0x01
391 size_t line; /* current magic line number */
393 /* data for searches */
395 const char *s; /* start of search in original source */
396 size_t s_len; /* length of search region */
397 size_t offset; /* starting offset in source: XXX - should this be off_t? */
398 size_t rm_len; /* match length */
401 /* FIXME: Make the string dynamically allocated so that e.g.
402 strings matched in files can be longer than MAXstring */
403 union VALUETYPE ms_value; /* either number or string */
406 /* Type for Unicode characters */
407 typedef unsigned long unichar;
410 #define FILE_T_LOCAL 1
411 #define FILE_T_WINDOWS 2
412 protected const char *file_fmttime(uint64_t, int, char *);
413 protected struct magic_set *file_ms_alloc(int);
414 protected void file_ms_free(struct magic_set *);
415 protected int file_buffer(struct magic_set *, int, const char *, const void *,
417 protected int file_fsmagic(struct magic_set *, const char *, struct stat *);
418 protected int file_pipe2file(struct magic_set *, int, const void *, size_t);
419 protected int file_vprintf(struct magic_set *, const char *, va_list)
420 __attribute__((__format__(__printf__, 2, 0)));
421 protected size_t file_printedlen(const struct magic_set *);
422 protected int file_replace(struct magic_set *, const char *, const char *);
423 protected int file_printf(struct magic_set *, const char *, ...)
424 __attribute__((__format__(__printf__, 2, 3)));
425 protected int file_reset(struct magic_set *);
426 protected int file_tryelf(struct magic_set *, int, const unsigned char *,
428 protected int file_trycdf(struct magic_set *, int, const unsigned char *,
431 protected int file_zmagic(struct magic_set *, int, const char *,
432 const unsigned char *, size_t);
434 protected int file_ascmagic(struct magic_set *, const unsigned char *, size_t,
436 protected int file_ascmagic_with_encoding(struct magic_set *,
437 const unsigned char *, size_t, unichar *, size_t, const char *,
439 protected int file_encoding(struct magic_set *, const unsigned char *, size_t,
440 unichar **, size_t *, const char **, const char **, const char **);
441 protected int file_is_tar(struct magic_set *, const unsigned char *, size_t);
442 protected int file_softmagic(struct magic_set *, const unsigned char *, size_t,
444 protected int file_apprentice(struct magic_set *, const char *, int);
445 protected int file_magicfind(struct magic_set *, const char *, struct mlist *);
446 protected uint64_t file_signextend(struct magic_set *, struct magic *,
448 protected void file_badread(struct magic_set *);
449 protected void file_badseek(struct magic_set *);
450 protected void file_oomem(struct magic_set *, size_t);
451 protected void file_error(struct magic_set *, int, const char *, ...)
452 __attribute__((__format__(__printf__, 3, 4)));
453 protected void file_magerror(struct magic_set *, const char *, ...)
454 __attribute__((__format__(__printf__, 2, 3)));
455 protected void file_magwarn(struct magic_set *, const char *, ...)
456 __attribute__((__format__(__printf__, 2, 3)));
457 protected void file_mdump(struct magic *);
458 protected void file_showstr(FILE *, const char *, size_t);
459 protected size_t file_mbswidth(const char *);
460 protected const char *file_getbuffer(struct magic_set *);
461 protected ssize_t sread(int, void *, size_t, int);
462 protected int file_check_mem(struct magic_set *, unsigned int);
463 protected int file_looks_utf8(const unsigned char *, size_t, unichar *,
465 protected size_t file_pstring_length_size(const struct magic *);
466 protected size_t file_pstring_get_length(const struct magic *, const char *);
468 protected int file_os2_apptype(struct magic_set *, const char *, const void *,
479 protected int file_regcomp(file_regex_t *, const char *, int);
480 protected int file_regexec(file_regex_t *, const char *, size_t, regmatch_t *,
482 protected void file_regfree(file_regex_t *);
483 protected void file_regerror(file_regex_t *, int, struct magic_set *);
490 protected file_pushbuf_t *file_push_buffer(struct magic_set *);
491 protected char *file_pop_buffer(struct magic_set *, file_pushbuf_t *);
494 extern const char *file_names[];
495 extern const size_t file_nnames;
498 #ifndef HAVE_STRERROR
500 extern char *sys_errlist[];
501 #define strerror(e) \
502 (((e) >= 0 && (e) < sys_nerr) ? sys_errlist[(e)] : "Unknown error")
506 #define strtoul(a, b, c) strtol(a, b, c)
510 ssize_t pread(int, void *, size_t, off_t);
512 #ifndef HAVE_VASPRINTF
513 int vasprintf(char **, const char *, va_list);
515 #ifndef HAVE_ASPRINTF
516 int asprintf(char **, const char *, ...);
520 size_t strlcpy(char *, const char *, size_t);
523 size_t strlcat(char *, const char *, size_t);
525 #ifndef HAVE_STRCASESTR
526 char *strcasestr(const char *, const char *);
529 ssize_t getline(char **, size_t *, FILE *);
530 ssize_t getdelim(char **, size_t *, int, FILE *);
533 char *ctime_r(const time_t *, char *);
535 #ifndef HAVE_ASCTIME_R
536 char *asctime_r(const struct tm *, char *);
538 #ifndef HAVE_FMTCHECK
539 const char *fmtcheck(const char *, const char *)
540 __attribute__((__format_arg__(2)));
543 #if defined(HAVE_MMAP) && defined(HAVE_SYS_MMAN_H) && !defined(QUICK)
552 #if defined(__GNUC__) && (__GNUC__ >= 3)
553 #define FILE_RCSID(id) \
554 static const char rcsid[] __attribute__((__used__)) = id;
556 #define FILE_RCSID(id) \
557 static const char *rcsid(const char *p) { \
558 return rcsid(p = id); \
562 #define FILE_RCSID(id)
565 #endif /* __file_h__ */