source: trunk/minix/commands/pax/tar.h@ 21

Last change on this file since 21 was 9, checked in by Mattia Monga, 13 years ago

Minix 3.1.2a
File size: 5.1 KB
Line 
1/*-
2 * Copyright (c) 1992 Keith Muller.
3 * Copyright (c) 1992, 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Keith Muller of the University of California, San Diego.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)tar.h 8.2 (Berkeley) 4/18/94
34 * $FreeBSD: src/bin/pax/tar.h,v 1.7 2004/04/06 20:06:49 markm Exp $
35 */
36
37/*
38 * defines and data structures common to all tar formats
39 */
40#define CHK_LEN 8 /* length of checksum field */
41#define TNMSZ 100 /* size of name field */
42#ifdef _PAX_
43#define NULLCNT 2 /* number of null blocks in trailer */
44#define CHK_OFFSET 148 /* start of checksum field */
45#define BLNKSUM 256L /* sum of checksum field using ' ' */
46#endif /* _PAX_ */
47
48/*
49 * Values used in typeflag field in all tar formats
50 * (only REGTYPE, LNKTYPE and SYMTYPE are used in old BSD tar headers)
51 */
52#define REGTYPE '0' /* Regular File */
53#define AREGTYPE '\0' /* Regular File */
54#define LNKTYPE '1' /* Link */
55#define SYMTYPE '2' /* Symlink */
56#define CHRTYPE '3' /* Character Special File */
57#define BLKTYPE '4' /* Block Special File */
58#define DIRTYPE '5' /* Directory */
59#define FIFOTYPE '6' /* FIFO */
60#define CONTTYPE '7' /* high perf file */
61
62/*
63 * Mode field encoding of the different file types - values in octal
64 */
65#define TSUID 04000 /* Set UID on execution */
66#define TSGID 02000 /* Set GID on execution */
67#define TSVTX 01000 /* Reserved */
68#define TUREAD 00400 /* Read by owner */
69#define TUWRITE 00200 /* Write by owner */
70#define TUEXEC 00100 /* Execute/Search by owner */
71#define TGREAD 00040 /* Read by group */
72#define TGWRITE 00020 /* Write by group */
73#define TGEXEC 00010 /* Execute/Search by group */
74#define TOREAD 00004 /* Read by other */
75#define TOWRITE 00002 /* Write by other */
76#define TOEXEC 00001 /* Execute/Search by other */
77
78#ifdef _PAX_
79/*
80 * Pad with a bit mask, much faster than doing a mod but only works on powers
81 * of 2. Macro below is for block of 512 bytes.
82 */
83#define TAR_PAD(x) ((512 - ((x) & 511)) & 511)
84#endif /* _PAX_ */
85
86/*
87 * structure of an old tar header as it appeared in BSD releases
88 */
89typedef struct {
90 char name[TNMSZ]; /* name of entry */
91 char mode[8]; /* mode */
92 char uid[8]; /* uid */
93 char gid[8]; /* gid */
94 char size[12]; /* size */
95 char mtime[12]; /* modification time */
96 char chksum[CHK_LEN]; /* checksum */
97 char linkflag; /* norm, hard, or sym. */
98 char linkname[TNMSZ]; /* linked to name */
99} HD_TAR;
100
101#ifdef _PAX_
102/*
103 * -o options for BSD tar to not write directories to the archive
104 */
105#define TAR_NODIR "nodir"
106#define TAR_OPTION "write_opt"
107
108/*
109 * default device names
110 */
111#define DEV_0 "/dev/rmt0"
112#define DEV_1 "/dev/rmt1"
113#define DEV_4 "/dev/rmt4"
114#define DEV_5 "/dev/rmt5"
115#define DEV_7 "/dev/rmt7"
116#define DEV_8 "/dev/rmt8"
117#endif /* _PAX_ */
118
119/*
120 * Data Interchange Format - Extended tar header format - POSIX 1003.1-1990
121 */
122#define TPFSZ 155
123#define TMAGIC "ustar" /* ustar and a null */
124#define TMAGLEN 6
125#define TVERSION "00" /* 00 and no null */
126#define TVERSLEN 2
127
128typedef struct {
129 char name[TNMSZ]; /* name of entry */
130 char mode[8]; /* mode */
131 char uid[8]; /* uid */
132 char gid[8]; /* gid */
133 char size[12]; /* size */
134 char mtime[12]; /* modification time */
135 char chksum[CHK_LEN]; /* checksum */
136 char typeflag; /* type of file. */
137 char linkname[TNMSZ]; /* linked to name */
138 char magic[TMAGLEN]; /* magic cookie */
139 char version[TVERSLEN]; /* version */
140 char uname[32]; /* ascii owner name */
141 char gname[32]; /* ascii group name */
142 char devmajor[8]; /* major device number */
143 char devminor[8]; /* minor device number */
144 char prefix[TPFSZ]; /* linked to name */
145} HD_USTAR;
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