373 lines
11 KiB
C
373 lines
11 KiB
C
/*
|
|
* 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
|
|
* @(#)$File: file.h,v 1.92 2007/11/08 00:31:37 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>
|
|
#include <fcntl.h> /* For open and flags */
|
|
#ifdef HAVE_STDINT_H
|
|
#include <stdint.h>
|
|
#endif
|
|
#ifdef HAVE_INTTYPES_H
|
|
#include <inttypes.h>
|
|
#endif
|
|
#include <regex.h>
|
|
#include <sys/types.h>
|
|
/* Do this here and now, because struct stat gets re-defined on solaris */
|
|
#include <sys/stat.h>
|
|
|
|
#define ENABLE_CONDITIONALS
|
|
|
|
#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 __GNUC_PREREQ__
|
|
#ifdef __GNUC__
|
|
#define __GNUC_PREREQ__(x, y) \
|
|
((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || \
|
|
(__GNUC__ > (x)))
|
|
#else
|
|
#define __GNUC_PREREQ__(x, y) 0
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef MIN
|
|
#define MIN(a,b) (((a) < (b)) ? (a) : (b))
|
|
#endif
|
|
|
|
#ifndef HOWMANY
|
|
# define HOWMANY (256 * 1024) /* how much of the file to look at */
|
|
#endif
|
|
#define MAXMAGIS 8192 /* 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 4
|
|
#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 OFFADD 2 /* if '>&' or '>...(&' appears */
|
|
#define INDIROFFADD 4 /* if '>&(' appears */
|
|
#define UNSIGNED 8 /* comparison is unsigned */
|
|
|
|
/* 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_INVALID 0
|
|
#define FILE_BYTE 1
|
|
#define FILE_SHORT 2
|
|
#define FILE_DEFAULT 3
|
|
#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_SEARCH 20
|
|
#define FILE_MEDATE 21
|
|
#define FILE_MELDATE 22
|
|
#define FILE_MELONG 23
|
|
#define FILE_QUAD 24
|
|
#define FILE_LEQUAD 25
|
|
#define FILE_BEQUAD 26
|
|
#define FILE_QDATE 27
|
|
#define FILE_LEQDATE 28
|
|
#define FILE_BEQDATE 29
|
|
#define FILE_QLDATE 30
|
|
#define FILE_LEQLDATE 31
|
|
#define FILE_BEQLDATE 32
|
|
#define FILE_FLOAT 33
|
|
#define FILE_BEFLOAT 34
|
|
#define FILE_LEFLOAT 35
|
|
#define FILE_DOUBLE 36
|
|
#define FILE_BEDOUBLE 37
|
|
#define FILE_LEDOUBLE 38
|
|
#define FILE_NAMES_SIZE 39/* size of array to contain all names */
|
|
|
|
#define IS_STRING(t) \
|
|
((t) == FILE_STRING || \
|
|
(t) == FILE_PSTRING || \
|
|
(t) == FILE_BESTRING16 || \
|
|
(t) == FILE_LESTRING16 || \
|
|
(t) == FILE_REGEX || \
|
|
(t) == FILE_SEARCH || \
|
|
(t) == FILE_DEFAULT)
|
|
|
|
#define FILE_FMT_NONE 0
|
|
#define FILE_FMT_NUM 1 /* "cduxXi" */
|
|
#define FILE_FMT_STR 2 /* "s" */
|
|
#define FILE_FMT_QUAD 3 /* "ll" */
|
|
#define FILE_FMT_FLOAT 4 /* "eEfFgG" */
|
|
#define FILE_FMT_DOUBLE 5 /* "eEfFgG" */
|
|
|
|
/* Word 3 */
|
|
uint8_t in_op; /* operator for indirection */
|
|
uint8_t mask_op; /* operator for mask */
|
|
#ifdef ENABLE_CONDITIONALS
|
|
uint8_t cond; /* conditional type */
|
|
uint8_t dummy1;
|
|
#else
|
|
uint8_t dummy1;
|
|
uint8_t dummy2;
|
|
#endif
|
|
|
|
#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_OPS_MASK 0x07 /* mask for above ops */
|
|
#define FILE_UNUSED_1 0x08
|
|
#define FILE_UNUSED_2 0x10
|
|
#define FILE_UNUSED_3 0x20
|
|
#define FILE_OPINVERSE 0x40
|
|
#define FILE_OPINDIRECT 0x80
|
|
|
|
#ifdef ENABLE_CONDITIONALS
|
|
#define COND_NONE 0
|
|
#define COND_IF 1
|
|
#define COND_ELIF 2
|
|
#define COND_ELSE 3
|
|
#endif /* ENABLE_CONDITIONALS */
|
|
|
|
/* Word 4 */
|
|
uint32_t offset; /* offset to magic number */
|
|
/* Word 5 */
|
|
int32_t in_offset; /* offset from indirection */
|
|
/* Word 6 */
|
|
uint32_t lineno; /* line number in magic file */
|
|
/* Word 7,8 */
|
|
union {
|
|
uint64_t _mask; /* for use with numeric and date types */
|
|
struct {
|
|
uint32_t _count; /* repeat/line count */
|
|
uint32_t _flags; /* modifier flags */
|
|
} _s; /* for use with string types */
|
|
} _u;
|
|
#define num_mask _u._mask
|
|
#define str_count _u._s._count
|
|
#define str_flags _u._s._flags
|
|
|
|
/* Words 9-16 */
|
|
union VALUETYPE {
|
|
uint8_t b;
|
|
uint16_t h;
|
|
uint32_t l;
|
|
uint64_t q;
|
|
uint8_t hs[2]; /* 2 bytes of a fixed-endian "short" */
|
|
uint8_t hl[4]; /* 4 bytes of a fixed-endian "long" */
|
|
uint8_t hq[8]; /* 8 bytes of a fixed-endian "quad" */
|
|
char s[MAXstring]; /* the search string or regex pattern */
|
|
float f;
|
|
double d;
|
|
} value; /* either number or string */
|
|
/* Words 17..31 */
|
|
char desc[MAXDESC]; /* description */
|
|
};
|
|
|
|
#define BIT(A) (1 << (A))
|
|
#define STRING_COMPACT_BLANK BIT(0)
|
|
#define STRING_COMPACT_OPTIONAL_BLANK BIT(1)
|
|
#define STRING_IGNORE_LOWERCASE BIT(2)
|
|
#define STRING_IGNORE_UPPERCASE BIT(3)
|
|
#define REGEX_OFFSET_START BIT(4)
|
|
#define CHAR_COMPACT_BLANK 'B'
|
|
#define CHAR_COMPACT_OPTIONAL_BLANK 'b'
|
|
#define CHAR_IGNORE_LOWERCASE 'c'
|
|
#define CHAR_IGNORE_UPPERCASE 'C'
|
|
#define CHAR_REGEX_OFFSET_START 's'
|
|
#define STRING_IGNORE_CASE (STRING_IGNORE_LOWERCASE|STRING_IGNORE_UPPERCASE)
|
|
|
|
|
|
/* 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;
|
|
struct level_info {
|
|
int32_t off;
|
|
int got_match;
|
|
#ifdef ENABLE_CONDITIONALS
|
|
int last_match;
|
|
int last_cond; /* used for error checking by parse() */
|
|
#endif
|
|
} *li;
|
|
} c;
|
|
struct out {
|
|
/* Accumulation buffer */
|
|
char *buf;
|
|
char *ptr;
|
|
size_t left;
|
|
size_t size;
|
|
/* Printable buffer */
|
|
char *pbuf;
|
|
size_t psize;
|
|
} o;
|
|
uint32_t offset;
|
|
int error;
|
|
int flags;
|
|
int haderr;
|
|
const char *file;
|
|
size_t line; /* current magic line number */
|
|
|
|
/* data for searches */
|
|
struct {
|
|
const char *s; /* start of search in original source */
|
|
size_t s_len; /* length of search region */
|
|
size_t offset; /* starting offset in source: XXX - should this be off_t? */
|
|
size_t rm_len; /* match length */
|
|
} search;
|
|
|
|
union VALUETYPE ms_value; /* either number or string */
|
|
};
|
|
|
|
struct stat;
|
|
protected const char *file_fmttime(uint32_t, int);
|
|
protected int file_buffer(struct magic_set *, int, const char *, 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 *, int, const char *,
|
|
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 uint64_t file_signextend(struct magic_set *, struct magic *,
|
|
uint64_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 *, size_t);
|
|
protected void file_error(struct magic_set *, int, const char *, ...);
|
|
protected void file_magerror(struct magic_set *, 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 *);
|
|
protected ssize_t sread(int, void *, size_t, int);
|
|
protected int file_check_mem(struct magic_set *, unsigned int);
|
|
|
|
#ifndef COMPILE_ONLY
|
|
extern const char *file_names[];
|
|
extern const size_t file_nnames;
|
|
#endif
|
|
|
|
#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
|
|
|
|
#ifndef HAVE_SNPRINTF
|
|
int snprintf(char *, size_t, const char *, ...);
|
|
#endif
|
|
|
|
#if defined(HAVE_MMAP) && defined(HAVE_SYS_MMAN_H) && !defined(QUICK)
|
|
#define QUICK
|
|
#endif
|
|
|
|
#ifndef O_BINARY
|
|
#define O_BINARY 0
|
|
#endif
|
|
|
|
#define FILE_RCSID(id) \
|
|
static const char *rcsid(const char *p) { \
|
|
return rcsid(p = id); \
|
|
}
|
|
|
|
#endif /* __file_h__ */
|