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 1.108 2008/07/16 18:00:57 christos Exp $
40 #include <stdio.h> /* Include that here, to make sure __P gets defined */
42 #include <fcntl.h> /* For open and flags */
46 #ifdef HAVE_INTTYPES_H
50 #include <sys/types.h>
51 /* Do this here and now, because struct stat gets re-defined on solaris */
55 #define ENABLE_CONDITIONALS
58 #define MAGIC "/etc/magic"
67 #define private static
73 #ifndef __GNUC_PREREQ__
75 #define __GNUC_PREREQ__(x, y) \
76 ((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || \
79 #define __GNUC_PREREQ__(x, y) 0
85 #define __attribute__(a)
90 #define MIN(a,b) (((a) < (b)) ? (a) : (b))
94 #define MAX(a,b) (((a) > (b)) ? (a) : (b))
98 # define HOWMANY (256 * 1024) /* how much of the file to look at */
100 #define MAXMAGIS 8192 /* max entries in any one magic file
102 #define MAXDESC 64 /* max leng of text description/MIME type */
103 #define MAXstring 32 /* max leng of "string" types */
105 #define MAGICNO 0xF11E041C
107 #define FILE_MAGICSIZE (32 * 6)
111 #define FILE_COMPILE 2
118 uint8_t hs[2]; /* 2 bytes of a fixed-endian "short" */
119 uint8_t hl[4]; /* 4 bytes of a fixed-endian "long" */
120 uint8_t hq[8]; /* 8 bytes of a fixed-endian "quad" */
121 char s[MAXstring]; /* the search string or regex pattern */
122 unsigned char us[MAXstring];
129 uint16_t cont_level; /* level of ">" */
131 #define INDIR 0x01 /* if '(...)' appears */
132 #define OFFADD 0x02 /* if '>&' or '>...(&' appears */
133 #define INDIROFFADD 0x04 /* if '>&(' appears */
134 #define UNSIGNED 0x08 /* comparison is unsigned */
135 #define NOSPACE 0x10 /* suppress space character before output */
136 #define BINTEST 0x20 /* test is for a binary type (set only
137 for top-level tests) */
138 #define TEXTTEST 0 /* for passing to file_softmagic */
143 uint8_t reln; /* relation (0=eq, '>'=gt, etc) */
144 uint8_t vallen; /* length of string value, if any */
145 uint8_t type; /* comparison type (FILE_*) */
146 uint8_t in_type; /* type of indirection */
147 #define FILE_INVALID 0
150 #define FILE_DEFAULT 3
152 #define FILE_STRING 5
154 #define FILE_BESHORT 7
155 #define FILE_BELONG 8
156 #define FILE_BEDATE 9
157 #define FILE_LESHORT 10
158 #define FILE_LELONG 11
159 #define FILE_LEDATE 12
160 #define FILE_PSTRING 13
161 #define FILE_LDATE 14
162 #define FILE_BELDATE 15
163 #define FILE_LELDATE 16
164 #define FILE_REGEX 17
165 #define FILE_BESTRING16 18
166 #define FILE_LESTRING16 19
167 #define FILE_SEARCH 20
168 #define FILE_MEDATE 21
169 #define FILE_MELDATE 22
170 #define FILE_MELONG 23
172 #define FILE_LEQUAD 25
173 #define FILE_BEQUAD 26
174 #define FILE_QDATE 27
175 #define FILE_LEQDATE 28
176 #define FILE_BEQDATE 29
177 #define FILE_QLDATE 30
178 #define FILE_LEQLDATE 31
179 #define FILE_BEQLDATE 32
180 #define FILE_FLOAT 33
181 #define FILE_BEFLOAT 34
182 #define FILE_LEFLOAT 35
183 #define FILE_DOUBLE 36
184 #define FILE_BEDOUBLE 37
185 #define FILE_LEDOUBLE 38
186 #define FILE_NAMES_SIZE 39/* size of array to contain all names */
188 #define IS_STRING(t) \
189 ((t) == FILE_STRING || \
190 (t) == FILE_PSTRING || \
191 (t) == FILE_BESTRING16 || \
192 (t) == FILE_LESTRING16 || \
193 (t) == FILE_REGEX || \
194 (t) == FILE_SEARCH || \
197 #define FILE_FMT_NONE 0
198 #define FILE_FMT_NUM 1 /* "cduxXi" */
199 #define FILE_FMT_STR 2 /* "s" */
200 #define FILE_FMT_QUAD 3 /* "ll" */
201 #define FILE_FMT_FLOAT 4 /* "eEfFgG" */
202 #define FILE_FMT_DOUBLE 5 /* "eEfFgG" */
205 uint8_t in_op; /* operator for indirection */
206 uint8_t mask_op; /* operator for mask */
207 #ifdef ENABLE_CONDITIONALS
208 uint8_t cond; /* conditional type */
213 #define FILE_FACTOR_OP_PLUS '+'
214 #define FILE_FACTOR_OP_MINUS '-'
215 #define FILE_FACTOR_OP_TIMES '*'
216 #define FILE_FACTOR_OP_DIV '/'
217 #define FILE_FACTOR_OP_NONE '\0'
219 #define FILE_OPS "&|^+-*/%"
224 #define FILE_OPMINUS 4
225 #define FILE_OPMULTIPLY 5
226 #define FILE_OPDIVIDE 6
227 #define FILE_OPMODULO 7
228 #define FILE_OPS_MASK 0x07 /* mask for above ops */
229 #define FILE_UNUSED_1 0x08
230 #define FILE_UNUSED_2 0x10
231 #define FILE_UNUSED_3 0x20
232 #define FILE_OPINVERSE 0x40
233 #define FILE_OPINDIRECT 0x80
235 #ifdef ENABLE_CONDITIONALS
240 #endif /* ENABLE_CONDITIONALS */
243 uint32_t offset; /* offset to magic number */
245 int32_t in_offset; /* offset from indirection */
247 uint32_t lineno; /* line number in magic file */
250 uint64_t _mask; /* for use with numeric and date types */
252 uint32_t _count; /* repeat/line count */
253 uint32_t _flags; /* modifier flags */
254 } _s; /* for use with string types */
256 #define num_mask _u._mask
257 #define str_range _u._s._count
258 #define str_flags _u._s._flags
260 union VALUETYPE value; /* either number or string */
262 char desc[MAXDESC]; /* description */
264 char mimetype[MAXDESC]; /* MIME type */
267 #define BIT(A) (1 << (A))
268 #define STRING_COMPACT_BLANK BIT(0)
269 #define STRING_COMPACT_OPTIONAL_BLANK BIT(1)
270 #define STRING_IGNORE_LOWERCASE BIT(2)
271 #define STRING_IGNORE_UPPERCASE BIT(3)
272 #define REGEX_OFFSET_START BIT(4)
273 #define CHAR_COMPACT_BLANK 'B'
274 #define CHAR_COMPACT_OPTIONAL_BLANK 'b'
275 #define CHAR_IGNORE_LOWERCASE 'c'
276 #define CHAR_IGNORE_UPPERCASE 'C'
277 #define CHAR_REGEX_OFFSET_START 's'
278 #define STRING_IGNORE_CASE (STRING_IGNORE_LOWERCASE|STRING_IGNORE_UPPERCASE)
279 #define STRING_DEFAULT_RANGE 100
282 /* list of magic entries */
284 struct magic *magic; /* array of magic entries */
285 uint32_t nmagic; /* number of entries in array */
286 int mapped; /* allocation type: 0 => apprentice_file
287 * 1 => apprentice_map + malloc
288 * 2 => apprentice_map + mmap */
289 struct mlist *next, *prev;
293 #define CAST(T, b) static_cast<T>(b)
295 #define CAST(T, b) (b)
301 #ifdef ENABLE_CONDITIONALS
303 int last_cond; /* used for error checking by parse() */
310 struct level_info *li;
313 char *buf; /* Accumulation buffer */
314 char *pbuf; /* Printable buffer */
321 size_t line; /* current magic line number */
323 /* data for searches */
325 const char *s; /* start of search in original source */
326 size_t s_len; /* length of search region */
327 size_t offset; /* starting offset in source: XXX - should this be off_t? */
328 size_t rm_len; /* match length */
331 /* FIXME: Make the string dynamically allocated so that e.g.
332 strings matched in files can be longer than MAXstring */
333 union VALUETYPE ms_value; /* either number or string */
336 /* Type for Unicode characters */
337 typedef unsigned long unichar;
340 protected const char *file_fmttime(uint32_t, int);
341 protected int file_buffer(struct magic_set *, int, const char *, const void *,
343 protected int file_fsmagic(struct magic_set *, const char *, struct stat *);
344 protected int file_pipe2file(struct magic_set *, int, const void *, size_t);
345 protected int file_vprintf(struct magic_set *, const char *, va_list);
346 protected int file_printf(struct magic_set *, const char *, ...)
347 __attribute__((__format__(__printf__, 2, 3)));
348 protected int file_reset(struct magic_set *);
349 protected int file_tryelf(struct magic_set *, int, const unsigned char *,
351 protected int file_zmagic(struct magic_set *, int, const char *,
352 const unsigned char *, size_t);
353 protected int file_ascmagic(struct magic_set *, const unsigned char *, size_t);
354 protected int file_is_tar(struct magic_set *, const unsigned char *, size_t);
355 protected int file_softmagic(struct magic_set *, const unsigned char *, size_t, int);
356 protected struct mlist *file_apprentice(struct magic_set *, const char *, int);
357 protected uint64_t file_signextend(struct magic_set *, struct magic *,
359 protected void file_delmagic(struct magic *, int type, size_t entries);
360 protected void file_badread(struct magic_set *);
361 protected void file_badseek(struct magic_set *);
362 protected void file_oomem(struct magic_set *, size_t);
363 protected void file_error(struct magic_set *, int, const char *, ...)
364 __attribute__((__format__(__printf__, 3, 4)));
365 protected void file_magerror(struct magic_set *, const char *, ...)
366 __attribute__((__format__(__printf__, 2, 3)));
367 protected void file_magwarn(struct magic_set *, const char *, ...)
368 __attribute__((__format__(__printf__, 2, 3)));
369 protected void file_mdump(struct magic *);
370 protected void file_showstr(FILE *, const char *, size_t);
371 protected size_t file_mbswidth(const char *);
372 protected const char *file_getbuffer(struct magic_set *);
373 protected ssize_t sread(int, void *, size_t, int);
374 protected int file_check_mem(struct magic_set *, unsigned int);
375 protected int file_looks_utf8(const unsigned char *, size_t, unichar *, size_t *);
378 extern const char *file_names[];
379 extern const size_t file_nnames;
382 #ifndef HAVE_STRERROR
384 extern char *sys_errlist[];
385 #define strerror(e) \
386 (((e) >= 0 && (e) < sys_nerr) ? sys_errlist[(e)] : "Unknown error")
390 #define strtoul(a, b, c) strtol(a, b, c)
393 #ifndef HAVE_VASPRINTF
394 int vasprintf(char **, const char *, va_list);
396 #ifndef HAVE_ASPRINTF
397 int asprintf(char **ptr, const char *format_string, ...);
400 #if defined(HAVE_MMAP) && defined(HAVE_SYS_MMAN_H) && !defined(QUICK)
410 static const char *rcsid(const char *) __attribute__((__used__));
412 #define FILE_RCSID(id) \
413 static const char *rcsid(const char *p) { \
414 return rcsid(p = id); \
417 #define FILE_RCSID(id)
420 #endif /* __file_h__ */