projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 15637ed4 RG |
1 | /* |
| 2 | * file.h - definitions for file(1) program | |
| 286a6f32 | 3 | * @(#)file.h,v 1.2 1993/06/10 00:38:09 jtc Exp |
| 15637ed4 RG |
4 | * |
| 5 | * Copyright (c) Ian F. Darwin, 1987. | |
| 6 | * Written by Ian F. Darwin. | |
| 7 | * | |
| 8 | * This software is not subject to any license of the American Telephone | |
| 9 | * and Telegraph Company or of the Regents of the University of California. | |
| 10 | * | |
| 11 | * Permission is granted to anyone to use this software for any purpose on | |
| 12 | * any computer system, and to alter it and redistribute it freely, subject | |
| 13 | * to the following restrictions: | |
| 14 | * | |
| 15 | * 1. The author is not responsible for the consequences of use of this | |
| 16 | * software, no matter how awful, even if they arise from flaws in it. | |
| 17 | * | |
| 18 | * 2. The origin of this software must not be misrepresented, either by | |
| 19 | * explicit claim or by omission. Since few users ever read sources, | |
| 20 | * credits must appear in the documentation. | |
| 21 | * | |
| 22 | * 3. Altered versions must be plainly marked as such, and must not be | |
| 23 | * misrepresented as being the original software. Since few users | |
| 24 | * ever read sources, credits must appear in the documentation. | |
| 25 | * | |
| 26 | * 4. This notice may not be removed or altered. | |
| 27 | */ | |
| 28 | ||
| 29 | #define HOWMANY 1024 /* how much of the file to look at */ | |
| 286a6f32 | 30 | #define MAXMAGIS 1000 /* max entries in /etc/magic */ |
| 15637ed4 RG |
31 | #define MAXDESC 50 /* max leng of text description */ |
| 32 | #define MAXstring 32 /* max leng of "string" types */ | |
| 15637ed4 RG |
33 | |
| 34 | struct magic { | |
| 286a6f32 C |
35 | short flag; |
| 36 | #define INDIR 1 /* if '>(...)' appears, */ | |
| 37 | short cont_level; /* level of ">" */ | |
| 38 | struct { | |
| 39 | char type; /* byte short long */ | |
| 40 | long offset; /* offset from indirection */ | |
| 41 | } in; | |
| 15637ed4 | 42 | long offset; /* offset to magic number */ |
| 286a6f32 C |
43 | #define MASK 0200 /* this is a masked op, like & v1 = v2 */ |
| 44 | unsigned char reln; /* relation (0=eq, '>'=gt, etc) */ | |
| 15637ed4 RG |
45 | char type; /* int, short, long or string. */ |
| 46 | char vallen; /* length of string value, if any */ | |
| 47 | #define BYTE 1 | |
| 48 | #define SHORT 2 | |
| 49 | #define LONG 4 | |
| 50 | #define STRING 5 | |
| 286a6f32 C |
51 | #define DATE 6 |
| 52 | #define BESHORT 7 | |
| 53 | #define BELONG 8 | |
| 54 | #define BEDATE 9 | |
| 55 | #define LESHORT 10 | |
| 56 | #define LELONG 11 | |
| 57 | #define LEDATE 12 | |
| 15637ed4 RG |
58 | union VALUETYPE { |
| 59 | char b; | |
| 60 | short h; | |
| 61 | long l; | |
| 62 | char s[MAXstring]; | |
| 286a6f32 C |
63 | unsigned char hs[2]; /* 2 bytes of a fixed-endian "short" */ |
| 64 | unsigned char hl[4]; /* 2 bytes of a fixed-endian "long" */ | |
| 15637ed4 | 65 | } value; /* either number or string */ |
| 286a6f32 C |
66 | long mask; /* mask before comparison with value */ |
| 67 | char nospflag; /* supress space character */ | |
| 15637ed4 RG |
68 | char desc[MAXDESC]; /* description */ |
| 69 | }; | |
| 70 | ||
| 286a6f32 C |
71 | #include <stdio.h> /* Include that here, to make sure __P gets defined */ |
| 72 | ||
| 73 | #ifndef __P | |
| 74 | # if __STDC__ || __cplusplus | |
| 75 | # define __P(a) a | |
| 76 | # else | |
| 77 | # define __P(a) () | |
| 78 | # define const | |
| 79 | # endif | |
| 80 | #endif | |
| 81 | ||
| 82 | extern int apprentice __P((char *, int)); | |
| 83 | extern int ascmagic __P((unsigned char *, int)); | |
| 84 | extern void error __P((const char *, ...)); | |
| 85 | extern void ckfputs __P((const char *, FILE *)); | |
| 86 | struct stat; | |
| 87 | extern int fsmagic __P((const char *, struct stat *)); | |
| 88 | extern int is_compress __P((const unsigned char *, int *)); | |
| 89 | extern int is_tar __P((unsigned char *)); | |
| 90 | extern void magwarn __P((const char *, ...)); | |
| 91 | extern void mdump __P((struct magic *)); | |
| 92 | extern void process __P((const char *, int)); | |
| 93 | extern void showstr __P((const char *)); | |
| 94 | extern int softmagic __P((unsigned char *, int)); | |
| 95 | extern void tryit __P((unsigned char *, int)); | |
| 96 | extern int uncompress __P((const unsigned char *, unsigned char **, int)); | |
| 97 | extern void ckfprintf __P((FILE *, const char *, ...)); | |
| 98 | ||
| 99 | ||
| 100 | ||
| 101 | extern int errno; /* Some unixes don't define this.. */ | |
| 102 | ||
| 103 | extern char *progname; /* the program name */ | |
| 104 | extern char *magicfile; /* name of the magic file */ | |
| 105 | extern int lineno; /* current line number in magic file */ | |
| 106 | ||
| 107 | extern struct magic *magic; /* array of magic entries */ | |
| 108 | extern int nmagic; /* number of valid magic[]s */ | |
| 109 | ||
| 110 | ||
| 111 | extern int debug; /* enable debugging? */ | |
| 112 | extern int zflag; /* process compressed files? */ | |
| 113 | extern int lflag; /* follow symbolic links? */ | |
| 114 | ||
| 115 | extern int optind; /* From getopt(3) */ | |
| 116 | extern char *optarg; | |
| 117 | ||
| 118 | #if !defined(__STDC__) || defined(sun) | |
| 119 | extern int sys_nerr; | |
| 120 | extern char *sys_errlist[]; | |
| 121 | #define strerror(e) \ | |
| 122 | (((e) >= 0 && (e) < sys_nerr) ? sys_errlist[(e)] : "Unknown error") | |
| 123 | #endif | |
| 124 | ||
| 125 | #ifndef MAXPATHLEN | |
| 126 | #define MAXPATHLEN 512 | |
| 127 | #endif |