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/* $OpenBSD: magic.h,v 1.12 2016/04/30 21:42:11 nicm Exp $ */
/*
* Copyright (c) 2015 Nicholas Marriott <nicm@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef MAGIC_H
#define MAGIC_H
#include <sys/tree.h>
#include <sys/queue.h>
#include <sys/stat.h>
#include <err.h>
#include <regex.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#define MAGIC_STRING_SIZE 31
#define MAGIC_STRENGTH_MULTIPLIER 10
enum magic_type {
MAGIC_TYPE_NONE = 0,
MAGIC_TYPE_BYTE,
MAGIC_TYPE_SHORT,
MAGIC_TYPE_LONG,
MAGIC_TYPE_QUAD,
MAGIC_TYPE_UBYTE,
MAGIC_TYPE_USHORT,
MAGIC_TYPE_ULONG,
MAGIC_TYPE_UQUAD,
MAGIC_TYPE_FLOAT,
MAGIC_TYPE_DOUBLE,
MAGIC_TYPE_STRING,
MAGIC_TYPE_PSTRING,
MAGIC_TYPE_DATE,
MAGIC_TYPE_QDATE,
MAGIC_TYPE_LDATE,
MAGIC_TYPE_QLDATE,
MAGIC_TYPE_UDATE,
MAGIC_TYPE_UQDATE,
MAGIC_TYPE_ULDATE,
MAGIC_TYPE_UQLDATE,
MAGIC_TYPE_BESHORT,
MAGIC_TYPE_BELONG,
MAGIC_TYPE_BEQUAD,
MAGIC_TYPE_UBESHORT,
MAGIC_TYPE_UBELONG,
MAGIC_TYPE_UBEQUAD,
MAGIC_TYPE_BEFLOAT,
MAGIC_TYPE_BEDOUBLE,
MAGIC_TYPE_BEDATE,
MAGIC_TYPE_BEQDATE,
MAGIC_TYPE_BELDATE,
MAGIC_TYPE_BEQLDATE,
MAGIC_TYPE_UBEDATE,
MAGIC_TYPE_UBEQDATE,
MAGIC_TYPE_UBELDATE,
MAGIC_TYPE_UBEQLDATE,
MAGIC_TYPE_BESTRING16,
MAGIC_TYPE_LESHORT,
MAGIC_TYPE_LELONG,
MAGIC_TYPE_LEQUAD,
MAGIC_TYPE_ULESHORT,
MAGIC_TYPE_ULELONG,
MAGIC_TYPE_ULEQUAD,
MAGIC_TYPE_LEFLOAT,
MAGIC_TYPE_LEDOUBLE,
MAGIC_TYPE_LEDATE,
MAGIC_TYPE_LEQDATE,
MAGIC_TYPE_LELDATE,
MAGIC_TYPE_LEQLDATE,
MAGIC_TYPE_ULEDATE,
MAGIC_TYPE_ULEQDATE,
MAGIC_TYPE_ULELDATE,
MAGIC_TYPE_ULEQLDATE,
MAGIC_TYPE_LESTRING16,
MAGIC_TYPE_MELONG,
MAGIC_TYPE_MEDATE,
MAGIC_TYPE_MELDATE,
MAGIC_TYPE_REGEX,
MAGIC_TYPE_SEARCH,
MAGIC_TYPE_DEFAULT,
};
TAILQ_HEAD(magic_lines, magic_line);
RB_HEAD(magic_tree, magic_line);
struct magic_line {
struct magic *root;
u_int line;
u_int strength;
struct magic_line *parent;
char strength_operator;
u_int strength_value;
int text;
int64_t offset;
int offset_relative;
char indirect_type;
int indirect_relative;
int64_t indirect_offset;
char indirect_operator;
int64_t indirect_operand;
enum magic_type type;
const char *type_string;
char type_operator;
int64_t type_operand;
char test_operator;
int test_not;
const char *test_string;
size_t test_string_size;
uint64_t test_unsigned;
int64_t test_signed;
double test_double;
int stringify;
const char *result;
const char *mimetype;
struct magic_lines children;
TAILQ_ENTRY(magic_line) entry;
RB_ENTRY(magic_line) node;
};
struct magic {
const char *path;
int warnings;
struct magic_tree tree;
int compiled;
regex_t format_short;
regex_t format_long;
regex_t format_quad;
regex_t format_float;
regex_t format_string;
};
struct magic_state {
char out[4096];
const char *mimetype;
int text;
const char *base;
size_t size;
size_t offset;
int matched;
};
#define MAGIC_TEST_TEXT 0x1
#define MAGIC_TEST_MIME 0x2
int magic_compare(struct magic_line *, struct magic_line *);
RB_PROTOTYPE(magic_tree, magic_line, node, magic_compare);
char *magic_strtoull(const char *, uint64_t *);
char *magic_strtoll(const char *, int64_t *);
void magic_vwarnm(struct magic *, u_int, const char *, va_list);
void magic_warnm(struct magic *, u_int, const char *, ...)
__attribute__ ((format (printf, 3, 4)));
void magic_warn(struct magic_line *, const char *, ...)
__attribute__ ((format (printf, 2, 3)));
void magic_dump(struct magic *);
struct magic *magic_load(FILE *, const char *, int);
const char *magic_test(struct magic *, const void *, size_t, int);
#endif /* MAGIC_H */
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