1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
/* $OpenBSD: file.h,v 1.16 2004/05/19 02:32:35 tedu Exp $ */
/*
* Copyright (c) Ian F. Darwin 1986-1995.
* Software written by Ian F. Darwin and others;
* maintained 1995-present by Christos Zoulas and others.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice immediately at the beginning of the file, without modification,
* this list of conditions, and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* file.h - definitions for file(1) program
* @(#)$Id: file.h,v 1.16 2004/05/19 02:32:35 tedu Exp $
*/
#ifndef __file_h__
#define __file_h__
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h> /* Include that here, to make sure __P gets defined */
#include <errno.h>
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#endif
/* Do this here and now, because struct stat gets re-defined on solaris */
#include <sys/stat.h>
#ifndef MAGIC
#define MAGIC "/etc/magic"
#endif
#ifdef __EMX__
#define PATHSEP ';'
#else
#define PATHSEP ':'
#endif
#define private static
#ifndef protected
#define protected
#endif
#define public
#ifndef HOWMANY
# define HOWMANY 65536 /* how much of the file to look at */
#endif
#define MAXMAGIS 4096 /* max entries in /etc/magic */
#define MAXDESC 64 /* max leng of text description */
#define MAXstring 32 /* max leng of "string" types */
#define MAGICNO 0xF11E041C
#define VERSIONNO 2
#define FILE_MAGICSIZE (32 * 4)
#define FILE_LOAD 0
#define FILE_CHECK 1
#define FILE_COMPILE 2
struct magic {
/* Word 1 */
uint16_t cont_level; /* level of ">" */
uint8_t nospflag; /* supress space character */
uint8_t flag;
#define INDIR 1 /* if '>(...)' appears, */
#define UNSIGNED 2 /* comparison is unsigned */
#define OFFADD 4 /* if '>&' appears, */
/* Word 2 */
uint8_t reln; /* relation (0=eq, '>'=gt, etc) */
uint8_t vallen; /* length of string value, if any */
uint8_t type; /* int, short, long or string. */
uint8_t in_type; /* type of indirrection */
#define FILE_BYTE 1
#define FILE_SHORT 2
#define FILE_LONG 4
#define FILE_STRING 5
#define FILE_DATE 6
#define FILE_BESHORT 7
#define FILE_BELONG 8
#define FILE_BEDATE 9
#define FILE_LESHORT 10
#define FILE_LELONG 11
#define FILE_LEDATE 12
#define FILE_PSTRING 13
#define FILE_LDATE 14
#define FILE_BELDATE 15
#define FILE_LELDATE 16
#define FILE_REGEX 17
/* Word 3 */
uint8_t in_op; /* operator for indirection */
uint8_t mask_op; /* operator for mask */
uint8_t dummy1;
uint8_t dummy2;
#define FILE_OPS "&|^+-*/%"
#define FILE_OPAND 0
#define FILE_OPOR 1
#define FILE_OPXOR 2
#define FILE_OPADD 3
#define FILE_OPMINUS 4
#define FILE_OPMULTIPLY 5
#define FILE_OPDIVIDE 6
#define FILE_OPMODULO 7
#define FILE_OPINVERSE 0x80
/* Word 4 */
uint32_t offset; /* offset to magic number */
/* Word 5 */
uint32_t in_offset; /* offset from indirection */
/* Word 6 */
uint32_t mask; /* mask before comparison with value */
/* Word 7 */
uint32_t dummy3;
/* Word 8 */
uint32_t dummp4;
/* Words 9-16 */
union VALUETYPE {
uint8_t b;
uint16_t h;
uint32_t l;
char s[MAXstring];
char *buf;
uint8_t hs[2]; /* 2 bytes of a fixed-endian "short" */
uint8_t hl[4]; /* 4 bytes of a fixed-endian "long" */
} value; /* either number or string */
/* Words 17..31 */
char desc[MAXDESC]; /* description */
};
#define BIT(A) (1 << (A))
#define STRING_IGNORE_LOWERCASE BIT(0)
#define STRING_COMPACT_BLANK BIT(1)
#define STRING_COMPACT_OPTIONAL_BLANK BIT(2)
#define CHAR_IGNORE_LOWERCASE 'c'
#define CHAR_COMPACT_BLANK 'B'
#define CHAR_COMPACT_OPTIONAL_BLANK 'b'
/* list of magic entries */
struct mlist {
struct magic *magic; /* array of magic entries */
uint32_t nmagic; /* number of entries in array */
int mapped; /* allocation type: 0 => apprentice_file
* 1 => apprentice_map + malloc
* 2 => apprentice_map + mmap */
struct mlist *next, *prev;
};
struct magic_set {
struct mlist *mlist;
struct cont {
size_t len;
int32_t *off;
} c;
struct out {
/* Accumulation buffer */
char *buf;
char *ptr;
size_t len;
size_t size;
/* Printable buffer */
char *pbuf;
size_t psize;
} o;
int error;
int flags;
int haderr;
};
struct stat;
protected char *file_fmttime(uint32_t, int);
protected int file_buffer(struct magic_set *, const void *, size_t);
protected int file_fsmagic(struct magic_set *, const char *, struct stat *);
protected int file_pipe2file(struct magic_set *, int, const void *, size_t);
protected int file_printf(struct magic_set *, const char *, ...);
protected int file_reset(struct magic_set *);
protected int file_tryelf(struct magic_set *, int, const unsigned char *, size_t);
protected int file_zmagic(struct magic_set *, const unsigned char *, size_t);
protected int file_ascmagic(struct magic_set *, const unsigned char *, size_t);
protected int file_is_tar(struct magic_set *, const unsigned char *, size_t);
protected int file_softmagic(struct magic_set *, const unsigned char *, size_t);
protected struct mlist *file_apprentice(struct magic_set *, const char *, int);
protected uint32_t file_signextend(struct magic_set *, struct magic *, uint32_t);
protected void file_delmagic(struct magic *, int type, size_t entries);
protected void file_badread(struct magic_set *);
protected void file_badseek(struct magic_set *);
protected void file_oomem(struct magic_set *);
protected void file_error(struct magic_set *, int, const char *, ...);
protected void file_magwarn(const char *, ...);
protected void file_mdump(struct magic *);
protected void file_showstr(FILE *, const char *, size_t);
protected size_t file_mbswidth(const char *);
protected const char *file_getbuffer(struct magic_set *);
#if defined(HAVE_MMAP) && defined(HAVE_SYS_MMAN_H) && !defined(QUICK)
#define QUICK
#endif
#define FILE_RCSID(id) \
static const char *rcsid(const char *p) { \
return rcsid(p = id); \
}
#else
#endif /* __file_h__ */
|
