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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/contrib/file/src/tar.h
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/*

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 * Copyright (c) Ian F. Darwin 1986-1995.

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 * Software written by Ian F. Darwin and others;

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 * maintained 1995-present by Christos Zoulas and others.

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 *

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 * Redistribution and use in source and binary forms, with or without

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 * modification, are permitted provided that the following conditions

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 * are met:

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 * 1. Redistributions of source code must retain the above copyright

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 *    notice immediately at the beginning of the file, without modification,

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 *    this list of conditions, and the following disclaimer.

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 * 2. Redistributions in binary form must reproduce the above copyright

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 *    notice, this list of conditions and the following disclaimer in the

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 *    documentation and/or other materials provided with the distribution.

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 *

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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR

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 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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 * SUCH DAMAGE.

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 */

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/*

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 * Header file for file_public domain tar (tape archive) program.

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 *

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 * @(#)tar.h 1.20 86/10/29	Public Domain.

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 *

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 * Created 25 August 1985 by John Gilmore, ihnp4!hoptoad!gnu.

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 *

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 * $File: tar.h,v 1.16 2022/12/26 17:31:14 christos Exp $ # checkin only

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 */

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/*

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 * Header block on tape.

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 *

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 * I'm going to use traditional DP naming conventions here.

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 * A "block" is a big chunk of stuff that we do I/O on.

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 * A "record" is a piece of info that we care about.

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 * Typically many "record"s fit into a "block".

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 */

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#define	RECORDSIZE	512

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#define	NAMSIZ	100

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#define	TUNMLEN	32

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#define	TGNMLEN	32

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union record {

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	unsigned char	charptr[RECORDSIZE];

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	struct header {

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		char	name[NAMSIZ];

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		char	mode[8];

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		char	uid[8];

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		char	gid[8];

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		char	size[12];

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		char	mtime[12];

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		char	chksum[8];

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		char	linkflag;

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		char	linkname[NAMSIZ];

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		char	magic[8];

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		char	uname[TUNMLEN];

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		char	gname[TGNMLEN];

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		char	devmajor[8];

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		char	devminor[8];

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	} header;

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};

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/* The magic field is filled with this if uname and gname are valid. */

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#define	TMAGIC		"ustar"		/* 5 chars and a null */

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#define	GNUTMAGIC	"ustar  "	/* 7 chars and a null */

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