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tar.h
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1 /*
2 * Copyright (c) Ian F. Darwin 1986-1995.
3 * Software written by Ian F. Darwin and others;
4 * maintained 1995-present by Christos Zoulas and others.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice immediately at the beginning of the file, without modification,
11 * this list of conditions, and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28 /*
29 * Header file for public domain tar (tape archive) program.
30 *
31 * @(#)tar.h 1.20 86/10/29 Public Domain.
32 *
33 * Created 25 August 1985 by John Gilmore, ihnp4!hoptoad!gnu.
34 *
35 * $File: tar.h,v 1.11 2007/01/16 14:56:45 ljt Exp $ # checkin only
36 */
37
38 /*
39 * Kludge for handling systems that cannot cope with multiple
40 * external definitions of a variable. In ONE routine (tar.c),
41 * we #define TAR_EXTERN to null; here, we set it to "extern" if
42 * it is not already set.
43 */
44 #ifndef TAR_EXTERN
45 #define TAR_EXTERN extern
46 #endif
47
48 /*
49 * Header block on tape.
50 *
51 * I'm going to use traditional DP naming conventions here.
52 * A "block" is a big chunk of stuff that we do I/O on.
53 * A "record" is a piece of info that we care about.
54 * Typically many "record"s fit into a "block".
55 */
56 #define RECORDSIZE 512
57 #define NAMSIZ 100
58 #define TUNMLEN 32
59 #define TGNMLEN 32
60
61 union record {
62 char charptr[RECORDSIZE];
63 struct header {
64 char name[NAMSIZ];
65 char mode[8];
66 char uid[8];
67 char gid[8];
68 char size[12];
69 char mtime[12];
70 char chksum[8];
71 char linkflag;
72 char linkname[NAMSIZ];
73 char magic[8];
74 char uname[TUNMLEN];
75 char gname[TGNMLEN];
76 char devmajor[8];
77 char devminor[8];
78 } header;
79 };
80
81 /* The checksum field is filled with this while the checksum is computed. */
82 #define CHKBLANKS " " /* 8 blanks, no null */
83
84 /* The magic field is filled with this if uname and gname are valid. */
85 #define TMAGIC "ustar" /* 5 chars and a null */
86 #define GNUTMAGIC "ustar " /* 7 chars and a null */
87
88 /* The linkflag defines the type of file */
89 #define LF_OLDNORMAL '\0' /* Normal disk file, Unix compat */
90 #define LF_NORMAL '0' /* Normal disk file */
91 #define LF_LINK '1' /* Link to previously dumped file */
92 #define LF_SYMLINK '2' /* Symbolic link */
93 #define LF_CHR '3' /* Character special file */
94 #define LF_BLK '4' /* Block special file */
95 #define LF_DIR '5' /* Directory */
96 #define LF_FIFO '6' /* FIFO special file */
97 #define LF_CONTIG '7' /* Contiguous file */
98 /* Further link types may be defined later. */
99
100 /*
101 * Exit codes from the "tar" program
102 */
103 #define EX_SUCCESS 0 /* success! */
104 #define EX_ARGSBAD 1 /* invalid args */
105 #define EX_BADFILE 2 /* invalid filename */
106 #define EX_BADARCH 3 /* bad archive */
107 #define EX_SYSTEM 4 /* system gave unexpected error */
108
109 /*
110 * Structure for keeping track of filenames and lists thereof.
111 */
112 struct name {
113 struct name *next;
114 short length;
115 char found;
116 char name[NAMSIZ+1];
117 };
118
119 /*
120 *
121 * Due to the next struct declaration, each routine that includes
122 * "tar.h" must also include <sys/types.h>. I tried to make it automatic,
123 * but System V has no defines in <sys/types.h>, so there is no way of
124 * knowing when it has been included. In addition, it cannot be included
125 * twice, but must be included exactly once. Argghh!
126 *
127 * Thanks, typedef. Thanks, USG.
128 */
129 struct link {
130 struct link *next;
131 dev_t dev;
132 ino_t ino;
133 short linkcount;
134 char name[NAMSIZ+1];
135 };