175 lines
5.3 KiB
C
175 lines
5.3 KiB
C
/*
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* file.h - definitions for file(1) program
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* @(#)$Id: file.h,v 1.35 2001/03/11 20:29:16 christos 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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#ifndef __file_h__
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#define __file_h__
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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typedef int int32;
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typedef unsigned int uint32;
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typedef short int16;
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typedef unsigned short uint16;
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typedef char int8;
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typedef unsigned char uint8;
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#ifndef HOWMANY
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# define HOWMANY 16384 /* how much of the file to look at */
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#endif
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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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#define MAGICNO 0xF11E041C
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#define VERSIONNO 1
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#define CHECK 1
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#define COMPILE 2
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struct magic {
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uint16 cont_level;/* level of ">" */
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uint8 nospflag; /* supress space character */
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uint8 flag;
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#define INDIR 1 /* if '>(...)' appears, */
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#define UNSIGNED 2 /* comparison is unsigned */
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#define ADD 4 /* if '>&' appears, */
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uint8 reln; /* relation (0=eq, '>'=gt, etc) */
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uint8 vallen; /* length of string value, if any */
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uint8 type; /* int, short, long or string. */
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uint8 in_type; /* type of indirrection */
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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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int32 offset; /* offset to magic number */
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int32 in_offset; /* offset from indirection */
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union VALUETYPE {
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unsigned char b;
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unsigned short h;
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uint32 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]; /* 4 bytes of a fixed-endian "long" */
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} value; /* either number or string */
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uint32 mask; /* mask before comparison with value */
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char desc[MAXDESC]; /* description */
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};
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#define BIT(A) (1 << (A))
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#define STRING_IGNORE_LOWERCASE BIT(0)
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#define STRING_COMPACT_BLANK BIT(1)
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#define STRING_COMPACT_OPTIONAL_BLANK BIT(2)
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#define CHAR_IGNORE_LOWERCASE 'c'
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#define CHAR_COMPACT_BLANK 'B'
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#define CHAR_COMPACT_OPTIONAL_BLANK 'b'
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/* list of magic entries */
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struct mlist {
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struct magic *magic; /* array of magic entries */
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uint32 nmagic; /* number of entries in array */
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struct mlist *next, *prev;
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};
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#include <stdio.h> /* Include that here, to make sure __P gets defined */
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#include <errno.h>
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#ifndef __P
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# if defined(__STDC__) || defined(__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((const 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 int 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 uint32 signextend __P((struct magic *, unsigned int32));
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extern void tryelf __P((int, unsigned char *, int));
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extern char *progname; /* the program name */
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extern const 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 mlist mlist; /* list of arrays of magic entries */
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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 sflag; /* read/analyze block special files? */
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extern int iflag; /* Output types as mime-types */
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extern int optind; /* From getopt(3) */
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extern char *optarg;
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#ifndef HAVE_STRERROR
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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 HAVE_STRTOUL
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#define strtoul(a, b, c) strtol(a, b, c)
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#endif
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#ifdef __STDC__
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#define FILE_RCSID(id) \
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static const char *rcsid(const char *p) { \
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return rcsid(p = id); \
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}
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#else
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#define FILE_RCSID(id) static char rcsid[] = id;
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#endif
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#endif /* __file_h__ */
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