132 lines
4.3 KiB
C
132 lines
4.3 KiB
C
/*
|
|
* file.h - definitions for file(1) program
|
|
* @(#)$Id: file.h,v 1.2 1995/05/30 06:30:02 rgrimes Exp $
|
|
*
|
|
* 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 HOWMANY
|
|
# define HOWMANY 8192 /* how much of the file to look at */
|
|
#endif
|
|
#define MAXMAGIS 1000 /* 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 */
|
|
short cont_level; /* level of ">" */
|
|
struct {
|
|
char type; /* byte short long */
|
|
long offset; /* offset from indirection */
|
|
} in;
|
|
long offset; /* offset to magic number */
|
|
unsigned char reln; /* relation (0=eq, '>'=gt, etc) */
|
|
char 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;
|
|
unsigned long 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 */
|
|
unsigned long mask; /* mask before comparison with value */
|
|
char nospflag; /* supress space character */
|
|
char desc[MAXDESC]; /* description */
|
|
};
|
|
|
|
#include <stdio.h> /* Include that here, to make sure __P gets defined */
|
|
|
|
#ifndef __P
|
|
# if __STDC__ || __cplusplus
|
|
# define __P(a) a
|
|
# else
|
|
# define __P(a) ()
|
|
# define const
|
|
# endif
|
|
#endif
|
|
|
|
extern int apprentice __P((char *, int));
|
|
extern int ascmagic __P((unsigned char *, int));
|
|
extern void error __P((const char *, ...));
|
|
extern void ckfputs __P((const char *, FILE *));
|
|
struct stat;
|
|
extern int fsmagic __P((const char *, struct stat *));
|
|
extern int is_compress __P((const unsigned char *, int *));
|
|
extern int is_tar __P((unsigned char *, int));
|
|
extern void magwarn __P((const char *, ...));
|
|
extern void mdump __P((struct magic *));
|
|
extern void process __P((const char *, int));
|
|
extern void showstr __P((FILE *, const char *, int));
|
|
extern int softmagic __P((unsigned char *, int));
|
|
extern int tryit __P((unsigned char *, int, int));
|
|
extern int zmagic __P((unsigned char *, int));
|
|
extern void ckfprintf __P((FILE *, const char *, ...));
|
|
extern unsigned long signextend __P((struct magic *, unsigned long));
|
|
|
|
|
|
|
|
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(__STDC__) || defined(sun) || defined(__sun__) || 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
|