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- /* Extended tar format from POSIX.1.
- Copyright (C) 1992, 1996 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Written by David J. MacKenzie.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
- #ifndef _TAR_H
- #define _TAR_H 1
- /* A tar archive consists of 512-byte blocks.
- Each file in the archive has a header block followed by 0+ data blocks.
- Two blocks of NUL bytes indicate the end of the archive. */
- /* The fields of header blocks:
- All strings are stored as ISO 646 (approximately ASCII) strings.
- Fields are numeric unless otherwise noted below; numbers are ISO 646
- representations of octal numbers, with leading zeros as needed.
- linkname is only valid when typeflag==LNKTYPE. It doesn't use prefix;
- files that are links to pathnames >100 chars long can not be stored
- in a tar archive.
- If typeflag=={LNKTYPE,SYMTYPE,DIRTYPE} then size must be 0.
- devmajor and devminor are only valid for typeflag=={BLKTYPE,CHRTYPE}.
- chksum contains the sum of all 512 bytes in the header block,
- treating each byte as an 8-bit unsigned value and treating the
- 8 bytes of chksum as blank characters.
- uname and gname are used in preference to uid and gid, if those
- names exist locally.
- Field Name Byte Offset Length in Bytes Field Type
- name 0 100 NUL-terminated if NUL fits
- mode 100 8
- uid 108 8
- gid 116 8
- size 124 12
- mtime 136 12
- chksum 148 8
- typeflag 156 1 see below
- linkname 157 100 NUL-terminated if NUL fits
- magic 257 6 must be TMAGIC (NUL term.)
- version 263 2 must be TVERSION
- uname 265 32 NUL-terminated
- gname 297 32 NUL-terminated
- devmajor 329 8
- devminor 337 8
- prefix 345 155 NUL-terminated if NUL fits
- If the first character of prefix is '\0', the file name is name;
- otherwise, it is prefix/name. Files whose pathnames don't fit in that
- length can not be stored in a tar archive. */
- /* The bits in mode: */
- #define TSUID 04000
- #define TSGID 02000
- #define TSVTX 01000
- #define TUREAD 00400
- #define TUWRITE 00200
- #define TUEXEC 00100
- #define TGREAD 00040
- #define TGWRITE 00020
- #define TGEXEC 00010
- #define TOREAD 00004
- #define TOWRITE 00002
- #define TOEXEC 00001
- /* The values for typeflag:
- Values 'A'-'Z' are reserved for custom implementations.
- All other values are reserved for future POSIX.1 revisions. */
- #define REGTYPE '0' /* Regular file (preferred code). */
- #define AREGTYPE '\0' /* Regular file (alternate code). */
- #define LNKTYPE '1' /* Hard link. */
- #define SYMTYPE '2' /* Symbolic link (hard if not supported). */
- #define CHRTYPE '3' /* Character special. */
- #define BLKTYPE '4' /* Block special. */
- #define DIRTYPE '5' /* Directory. */
- #define FIFOTYPE '6' /* Named pipe. */
- #define CONTTYPE '7' /* Contiguous file */
- /* (regular file if not supported). */
- /* Contents of magic field and its length. */
- #define TMAGIC "ustar"
- #define TMAGLEN 6
- /* Contents of the version field and its length. */
- #define TVERSION "00"
- #define TVERSLEN 2
- #endif /* tar.h */
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