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/* $OpenBSD: file.h,v 1.11 2003/03/03 22:24:08 ian Exp $ */
/*
* file.h - definitions for file(1) program
*
* Copyright (c) Ian F. Darwin, 1987.
* Written by Ian F. Darwin.
*
* This software is not subject to any license of the American Telephone
* and Telegraph Company or of the Regents of the University of California.
*
* Permission is granted to anyone to use this software for any purpose on
* any computer system, and to alter it and redistribute it freely, subject
* to the following restrictions:
*
* 1. The author is not responsible for the consequences of use of this
* software, no matter how awful, even if they arise from flaws in it.
*
* 2. The origin of this software must not be misrepresented, either by
* explicit claim or by omission. Since few users ever read sources,
* credits must appear in the documentation.
*
* 3. Altered versions must be plainly marked as such, and must not be
* misrepresented as being the original software. Since few users
* ever read sources, credits must appear in the documentation.
*
* 4. This notice may not be removed or altered.
*/
#ifndef __file_h__
#define __file_h__
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <errno.h>
#include <stdio.h>
#ifdef HAVE_STDINT_H
#include <stdint.h>
#elif defined(HAVE_INTTYPES_H)
#include <inttypes.h>
#endif
#ifndef HOWMANY
# define HOWMANY 8192 /* how much of the file to look at */
#endif
#define MAXMAGIS 5000 /* max entries in /etc/magic */
#define MAXDESC 50 /* max leng of text description */
#define MAXstring 32 /* max leng of "string" types */
struct magic {
short flag;
#define INDIR 1 /* if '>(...)' appears, */
#define UNSIGNED 2 /* comparison is unsigned */
#define ADD 4 /* if '>&' appears, */
short cont_level; /* level of ">" */
struct {
int8_t type; /* byte short long */
int32_t offset; /* offset from indirection */
} in;
int32_t offset; /* offset to magic number */
unsigned char reln; /* relation (0=eq, '>'=gt, etc) */
int8_t type; /* int, short, long or string. */
char vallen; /* length of string value, if any */
#define BYTE 1
#define SHORT 2
#define LONG 4
#define STRING 5
#define DATE 6
#define BESHORT 7
#define BELONG 8
#define BEDATE 9
#define LESHORT 10
#define LELONG 11
#define LEDATE 12
union VALUETYPE {
unsigned char b;
unsigned short h;
uint32_t l;
char s[MAXstring];
unsigned char hs[2]; /* 2 bytes of a fixed-endian "short" */
unsigned char hl[4]; /* 2 bytes of a fixed-endian "long" */
} value; /* either number or string */
uint32_t mask; /* mask before comparison with value */
char nospflag; /* supress space character */
char desc[MAXDESC]; /* description */
};
extern int apprentice(char *, int);
extern int ascmagic(unsigned char *, int);
extern void ckfputs(const char *, FILE *);
struct stat;
extern int fsmagic(const char *, struct stat *);
extern int is_compress(const unsigned char *, int *);
extern int is_tar(unsigned char *, int);
extern void mdump(struct magic *);
extern void process(const char *, int);
extern void showstr(FILE *, const char *, int);
extern int softmagic(unsigned char *, int);
extern int tryit(unsigned char *, int, int);
extern int zmagic(unsigned char *, int);
extern void ckfprintf(FILE *, const char *, ...);
extern uint32_t signextend(struct magic *, uint32_t);
extern int internatmagic(unsigned char *, int);
extern void tryelf(int, unsigned char *, int);
extern int errno; /* Some unixes don't define this.. */
extern char *progname; /* the program name */
extern char *magicfile; /* name of the magic file */
extern int lineno; /* current line number in magic file */
extern struct magic *magic; /* array of magic entries */
extern int nmagic; /* number of valid magic[]s */
extern int debug; /* enable debugging? */
extern int zflag; /* process compressed files? */
extern int lflag; /* follow symbolic links? */
extern int optind; /* From getopt(3) */
extern char *optarg;
#if defined(sun) || defined(__sun__) || defined (__sun)
# if defined(__svr4) || defined (__SVR4) || defined(__svr4__)
# define SOLARIS
# else
# define SUNOS
# endif
#endif
#if !defined(__STDC__) || defined(SUNOS) || defined(__convex__)
extern int sys_nerr;
extern char *sys_errlist[];
#define strerror(e) \
(((e) >= 0 && (e) < sys_nerr) ? sys_errlist[(e)] : "Unknown error")
#define strtoul(a, b, c) strtol(a, b, c)
#endif
#ifndef MAXPATHLEN
#define MAXPATHLEN 512
#endif
#endif /* __file_h__ */
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