/* * file.h - definitions for file(1) program * @(#)$Id: file.h,v 1.1.1.1 1994/09/03 19:16:23 csgr 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 8192 /* how much of the file to look at */ #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 /* 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 void 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") #endif #ifndef MAXPATHLEN #define MAXPATHLEN 512 #endif