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129 lines
4.2 KiB
C
129 lines
4.2 KiB
C
/*
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* file.h - definitions for file(1) program
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* @(#)$Id: file.h,v 1.1.1.1 1994/09/03 19:16:23 csgr Exp $
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*
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* Copyright (c) Ian F. Darwin, 1987.
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* Written by Ian F. Darwin.
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*
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* This software is not subject to any license of the American Telephone
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* and Telegraph Company or of the Regents of the University of California.
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*
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* Permission is granted to anyone to use this software for any purpose on
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* any computer system, and to alter it and redistribute it freely, subject
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* to the following restrictions:
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*
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* 1. The author is not responsible for the consequences of use of this
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* software, no matter how awful, even if they arise from flaws in it.
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*
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* 2. The origin of this software must not be misrepresented, either by
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* explicit claim or by omission. Since few users ever read sources,
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* credits must appear in the documentation.
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*
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* 3. Altered versions must be plainly marked as such, and must not be
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* misrepresented as being the original software. Since few users
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* ever read sources, credits must appear in the documentation.
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*
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* 4. This notice may not be removed or altered.
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*/
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#define HOWMANY 8192 /* how much of the file to look at */
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#define MAXMAGIS 1000 /* max entries in /etc/magic */
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#define MAXDESC 50 /* max leng of text description */
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#define MAXstring 32 /* max leng of "string" types */
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struct magic {
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short flag;
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#define INDIR 1 /* if '>(...)' appears, */
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#define UNSIGNED 2 /* comparison is unsigned */
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short cont_level; /* level of ">" */
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struct {
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char type; /* byte short long */
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long offset; /* offset from indirection */
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} in;
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long offset; /* offset to magic number */
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unsigned char reln; /* relation (0=eq, '>'=gt, etc) */
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char type; /* int, short, long or string. */
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char vallen; /* length of string value, if any */
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#define BYTE 1
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#define SHORT 2
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#define LONG 4
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#define STRING 5
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#define DATE 6
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#define BESHORT 7
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#define BELONG 8
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#define BEDATE 9
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#define LESHORT 10
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#define LELONG 11
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#define LEDATE 12
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union VALUETYPE {
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unsigned char b;
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unsigned short h;
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unsigned long l;
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char s[MAXstring];
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unsigned char hs[2]; /* 2 bytes of a fixed-endian "short" */
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unsigned char hl[4]; /* 2 bytes of a fixed-endian "long" */
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} value; /* either number or string */
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unsigned long mask; /* mask before comparison with value */
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char nospflag; /* supress space character */
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char desc[MAXDESC]; /* description */
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};
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#include <stdio.h> /* Include that here, to make sure __P gets defined */
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#ifndef __P
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# if __STDC__ || __cplusplus
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# define __P(a) a
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# else
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# define __P(a) ()
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# define const
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# endif
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#endif
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extern int apprentice __P((char *, int));
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extern int ascmagic __P((unsigned char *, int));
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extern void error __P((const char *, ...));
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extern void ckfputs __P((const char *, FILE *));
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struct stat;
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extern int fsmagic __P((const char *, struct stat *));
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extern int is_compress __P((const unsigned char *, int *));
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extern int is_tar __P((unsigned char *, int));
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extern void magwarn __P((const char *, ...));
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extern void mdump __P((struct magic *));
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extern void process __P((const char *, int));
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extern void showstr __P((FILE *, const char *, int));
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extern int softmagic __P((unsigned char *, int));
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extern void tryit __P((unsigned char *, int, int));
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extern int zmagic __P((unsigned char *, int));
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extern void ckfprintf __P((FILE *, const char *, ...));
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extern unsigned long signextend __P((struct magic *, unsigned long));
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extern int errno; /* Some unixes don't define this.. */
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extern char *progname; /* the program name */
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extern char *magicfile; /* name of the magic file */
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extern int lineno; /* current line number in magic file */
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extern struct magic *magic; /* array of magic entries */
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extern int nmagic; /* number of valid magic[]s */
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extern int debug; /* enable debugging? */
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extern int zflag; /* process compressed files? */
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extern int lflag; /* follow symbolic links? */
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extern int optind; /* From getopt(3) */
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extern char *optarg;
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#if !defined(__STDC__) || defined(sun) || defined(__sun__) || defined(__convex__)
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extern int sys_nerr;
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extern char *sys_errlist[];
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#define strerror(e) \
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(((e) >= 0 && (e) < sys_nerr) ? sys_errlist[(e)] : "Unknown error")
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#endif
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#ifndef MAXPATHLEN
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#define MAXPATHLEN 512
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#endif
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