usr.bin/file/file.h

/*
 * file.h - definitions for file(1) program
 # @(#)$Header: file.h,v 1.4 87/09/18 10:56:09 ian 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.
 */

#define HOWMANY 1024            /* how much of the file to look at */
#define MAXMAGIS 250            /* max entries in /etc/magic */
#define MAXDESC 50              /* max leng of text description */
#define MAXstring 32            /* max leng of "string" types */
#define ckfputs(str,fil) {if (fputs(str,fil)==EOF) error(ckfmsg,"");}

struct magic {
        short contflag;         /* 1 if '>0' appears */
        long offset;            /* offset to magic number */
        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
        union VALUETYPE {
                char b;
                short h;
                long l;
                char s[MAXstring];
        } value;                /* either number or string */
        char desc[MAXDESC];     /* description */
};

extern void error(), exit();