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/*
* 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 1.64 2004/11/20 23:50:12 christos 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
#define FILE_BESTRING16 18
#define FILE_LESTRING16 19
#define FILE_FORMAT_NAME \
/* 0 */ "invalid 0", \
/* 1 */ "byte", \
/* 2 */ "short", \
/* 3 */ "invalid 3", \
/* 4 */ "long", \
/* 5 */ "string", \
/* 6 */ "date", \
/* 7 */ "beshort", \
/* 8 */ "belong", \
/* 9 */ "bedate" \
/* 10 */ "leshort", \
/* 11 */ "lelong", \
/* 12 */ "ledate", \
/* 13 */ "pstring", \
/* 14 */ "ldate", \
/* 15 */ "beldate", \
/* 16 */ "leldate", \
/* 17 */ "regex", \
/* 18 */ "bestring16", \
/* 19 */ "lestring16",
#define FILE_FMT_NUM "cduxXi"
#define FILE_FMT_STR "s"
#define FILE_FORMAT_STRING \
/* 0 */ NULL, \
/* 1 */ FILE_FMT_NUM, \
/* 2 */ FILE_FMT_NUM, \
/* 3 */ NULL, \
/* 4 */ FILE_FMT_NUM, \
/* 5 */ FILE_FMT_STR, \
/* 6 */ FILE_FMT_STR, \
/* 7 */ FILE_FMT_NUM, \
/* 8 */ FILE_FMT_NUM, \
/* 9 */ FILE_FMT_STR, \
/* 10 */ FILE_FMT_NUM, \
/* 11 */ FILE_FMT_NUM, \
/* 12 */ FILE_FMT_STR, \
/* 13 */ FILE_FMT_STR, \
/* 14 */ FILE_FMT_STR, \
/* 15 */ FILE_FMT_STR, \
/* 16 */ FILE_FMT_STR, \
/* 17 */ FILE_FMT_STR, \
/* 18 */ FILE_FMT_STR, \
/* 19 */ FILE_FMT_STR,
/* 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;
const char *file;
size_t line;
};
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(struct magic_set *, 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 *);
#ifndef HAVE_STRERROR
extern int sys_nerr;
extern char *sys_errlist[];
#define strerror(e) \
(((e) >= 0 && (e) < sys_nerr) ? sys_errlist[(e)] : "Unknown error")
#endif
#ifndef HAVE_STRTOUL
#define strtoul(a, b, c) strtol(a, b, c)
#endif
#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__ */
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