+++ /dev/null
-@comment GNU tar Archive Format description.
-@comment
-@comment Copyright (C) 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
-@comment 2000, 2001, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
-@comment
-@comment This program is free software; you can redistribute it and/or modify it
-@comment under the terms of the GNU General Public License as published by the
-@comment Free Software Foundation; either version 3, or (at your option) any later
-@comment version.
-@comment
-@comment This program is distributed in the hope that it will be useful, but
-@comment WITHOUT ANY WARRANTY; without even the implied warranty of
-@comment MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
-@comment Public License for more details.
-@comment
-@comment You should have received a copy of the GNU General Public License along
-@comment with this program; if not, write to the Free Software Foundation, Inc.,
-@comment 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
-
-/*@r{ tar Header Block, from POSIX 1003.1-1990. }*/
-
-/*@r{ POSIX header. }*/
-
-struct posix_header
-@{ /*@r{ byte offset }*/
- char name[100]; /*@r{ 0 }*/
- char mode[8]; /*@r{ 100 }*/
- char uid[8]; /*@r{ 108 }*/
- char gid[8]; /*@r{ 116 }*/
- char size[12]; /*@r{ 124 }*/
- char mtime[12]; /*@r{ 136 }*/
- char chksum[8]; /*@r{ 148 }*/
- char typeflag; /*@r{ 156 }*/
- char linkname[100]; /*@r{ 157 }*/
- char magic[6]; /*@r{ 257 }*/
- char version[2]; /*@r{ 263 }*/
- char uname[32]; /*@r{ 265 }*/
- char gname[32]; /*@r{ 297 }*/
- char devmajor[8]; /*@r{ 329 }*/
- char devminor[8]; /*@r{ 337 }*/
- char prefix[155]; /*@r{ 345 }*/
- /*@r{ 500 }*/
-@};
-
-#define TMAGIC "ustar" /*@r{ ustar and a null }*/
-#define TMAGLEN 6
-#define TVERSION "00" /*@r{ 00 and no null }*/
-#define TVERSLEN 2
-
-/*@r{ Values used in typeflag field. }*/
-#define REGTYPE '0' /*@r{ regular file }*/
-#define AREGTYPE '\0' /*@r{ regular file }*/
-#define LNKTYPE '1' /*@r{ link }*/
-#define SYMTYPE '2' /*@r{ reserved }*/
-#define CHRTYPE '3' /*@r{ character special }*/
-#define BLKTYPE '4' /*@r{ block special }*/
-#define DIRTYPE '5' /*@r{ directory }*/
-#define FIFOTYPE '6' /*@r{ FIFO special }*/
-#define CONTTYPE '7' /*@r{ reserved }*/
-
-#define XHDTYPE 'x' /*@r{ Extended header referring to the
- next file in the archive }*/
-#define XGLTYPE 'g' /*@r{ Global extended header }*/
-
-/*@r{ Bits used in the mode field, values in octal. }*/
-#define TSUID 04000 /*@r{ set UID on execution }*/
-#define TSGID 02000 /*@r{ set GID on execution }*/
-#define TSVTX 01000 /*@r{ reserved }*/
- /*@r{ file permissions }*/
-#define TUREAD 00400 /*@r{ read by owner }*/
-#define TUWRITE 00200 /*@r{ write by owner }*/
-#define TUEXEC 00100 /*@r{ execute/search by owner }*/
-#define TGREAD 00040 /*@r{ read by group }*/
-#define TGWRITE 00020 /*@r{ write by group }*/
-#define TGEXEC 00010 /*@r{ execute/search by group }*/
-#define TOREAD 00004 /*@r{ read by other }*/
-#define TOWRITE 00002 /*@r{ write by other }*/
-#define TOEXEC 00001 /*@r{ execute/search by other }*/
-
-/*@r{ tar Header Block, GNU extensions. }*/
-
-/*@r{ In GNU tar, SYMTYPE is for to symbolic links, and CONTTYPE is for
- contiguous files, so maybe disobeying the `reserved' comment in POSIX
- header description. I suspect these were meant to be used this way, and
- should not have really been `reserved' in the published standards. }*/
-
-/*@r{ *BEWARE* *BEWARE* *BEWARE* that the following information is still
- boiling, and may change. Even if the OLDGNU format description should be
- accurate, the so-called GNU format is not yet fully decided. It is
- surely meant to use only extensions allowed by POSIX, but the sketch
- below repeats some ugliness from the OLDGNU format, which should rather
- go away. Sparse files should be saved in such a way that they do *not*
- require two passes at archive creation time. Huge files get some POSIX
- fields to overflow, alternate solutions have to be sought for this. }*/
-
-/*@r{ Descriptor for a single file hole. }*/
-
-struct sparse
-@{ /*@r{ byte offset }*/
- char offset[12]; /*@r{ 0 }*/
- char numbytes[12]; /*@r{ 12 }*/
- /*@r{ 24 }*/
-@};
-
-/*@r{ Sparse files are not supported in POSIX ustar format. For sparse files
- with a POSIX header, a GNU extra header is provided which holds overall
- sparse information and a few sparse descriptors. When an old GNU header
- replaces both the POSIX header and the GNU extra header, it holds some
- sparse descriptors too. Whether POSIX or not, if more sparse descriptors
- are still needed, they are put into as many successive sparse headers as
- necessary. The following constants tell how many sparse descriptors fit
- in each kind of header able to hold them. }*/
-
-#define SPARSES_IN_EXTRA_HEADER 16
-#define SPARSES_IN_OLDGNU_HEADER 4
-#define SPARSES_IN_SPARSE_HEADER 21
-
-/*@r{ Extension header for sparse files, used immediately after the GNU extra
- header, and used only if all sparse information cannot fit into that
- extra header. There might even be many such extension headers, one after
- the other, until all sparse information has been recorded. }*/
-
-struct sparse_header
-@{ /*@r{ byte offset }*/
- struct sparse sp[SPARSES_IN_SPARSE_HEADER];
- /*@r{ 0 }*/
- char isextended; /*@r{ 504 }*/
- /*@r{ 505 }*/
-@};
-
-/*@r{ The old GNU format header conflicts with POSIX format in such a way that
- POSIX archives may fool old GNU tar's, and POSIX tar's might well be
- fooled by old GNU tar archives. An old GNU format header uses the space
- used by the prefix field in a POSIX header, and cumulates information
- normally found in a GNU extra header. With an old GNU tar header, we
- never see any POSIX header nor GNU extra header. Supplementary sparse
- headers are allowed, however. }*/
-
-struct oldgnu_header
-@{ /*@r{ byte offset }*/
- char unused_pad1[345]; /*@r{ 0 }*/
- char atime[12]; /*@r{ 345 Incr. archive: atime of the file }*/
- char ctime[12]; /*@r{ 357 Incr. archive: ctime of the file }*/
- char offset[12]; /*@r{ 369 Multivolume archive: the offset of
- the start of this volume }*/
- char longnames[4]; /*@r{ 381 Not used }*/
- char unused_pad2; /*@r{ 385 }*/
- struct sparse sp[SPARSES_IN_OLDGNU_HEADER];
- /*@r{ 386 }*/
- char isextended; /*@r{ 482 Sparse file: Extension sparse header
- follows }*/
- char realsize[12]; /*@r{ 483 Sparse file: Real size}*/
- /*@r{ 495 }*/
-@};
-
-/*@r{ OLDGNU_MAGIC uses both magic and version fields, which are contiguous.
- Found in an archive, it indicates an old GNU header format, which will be
- hopefully become obsolescent. With OLDGNU_MAGIC, uname and gname are
- valid, though the header is not truly POSIX conforming. }*/
-#define OLDGNU_MAGIC "ustar " /*@r{ 7 chars and a null }*/
-
-/*@r{ The standards committee allows only capital A through capital Z for
- user-defined expansion. Other letters in use include:
-
- 'A' Solaris Access Control List
- 'E' Solaris Extended Attribute File
- 'I' Inode only, as in 'star'
- 'N' Obsolete GNU tar, for file names that do not fit into the main header.
- 'X' POSIX 1003.1-2001 eXtended (VU version) }*/
-
-/*@r{ This is a dir entry that contains the names of files that were in the
- dir at the time the dump was made. }*/
-#define GNUTYPE_DUMPDIR 'D'
-
-/*@r{ Identifies the *next* file on the tape as having a long linkname. }*/
-#define GNUTYPE_LONGLINK 'K'
-
-/*@r{ Identifies the *next* file on the tape as having a long name. }*/
-#define GNUTYPE_LONGNAME 'L'
-
-/*@r{ This is the continuation of a file that began on another volume. }*/
-#define GNUTYPE_MULTIVOL 'M'
-
-/*@r{ This is for sparse files. }*/
-#define GNUTYPE_SPARSE 'S'
-
-/*@r{ This file is a tape/volume header. Ignore it on extraction. }*/
-#define GNUTYPE_VOLHDR 'V'
-
-/*@r{ Solaris extended header }*/
-#define SOLARIS_XHDTYPE 'X'
-
-/*@r{ J@"org Schilling star header }*/
-
-struct star_header
-@{ /*@r{ byte offset }*/
- char name[100]; /*@r{ 0 }*/
- char mode[8]; /*@r{ 100 }*/
- char uid[8]; /*@r{ 108 }*/
- char gid[8]; /*@r{ 116 }*/
- char size[12]; /*@r{ 124 }*/
- char mtime[12]; /*@r{ 136 }*/
- char chksum[8]; /*@r{ 148 }*/
- char typeflag; /*@r{ 156 }*/
- char linkname[100]; /*@r{ 157 }*/
- char magic[6]; /*@r{ 257 }*/
- char version[2]; /*@r{ 263 }*/
- char uname[32]; /*@r{ 265 }*/
- char gname[32]; /*@r{ 297 }*/
- char devmajor[8]; /*@r{ 329 }*/
- char devminor[8]; /*@r{ 337 }*/
- char prefix[131]; /*@r{ 345 }*/
- char atime[12]; /*@r{ 476 }*/
- char ctime[12]; /*@r{ 488 }*/
- /*@r{ 500 }*/
-@};
-
-#define SPARSES_IN_STAR_HEADER 4
-#define SPARSES_IN_STAR_EXT_HEADER 21
-
-struct star_in_header
-@{
- char fill[345]; /*@r{ 0 Everything that is before t_prefix }*/
- char prefix[1]; /*@r{ 345 t_name prefix }*/
- char fill2; /*@r{ 346 }*/
- char fill3[8]; /*@r{ 347 }*/
- char isextended; /*@r{ 355 }*/
- struct sparse sp[SPARSES_IN_STAR_HEADER]; /*@r{ 356 }*/
- char realsize[12]; /*@r{ 452 Actual size of the file }*/
- char offset[12]; /*@r{ 464 Offset of multivolume contents }*/
- char atime[12]; /*@r{ 476 }*/
- char ctime[12]; /*@r{ 488 }*/
- char mfill[8]; /*@r{ 500 }*/
- char xmagic[4]; /*@r{ 508 "tar" }*/
-@};
-
-struct star_ext_header
-@{
- struct sparse sp[SPARSES_IN_STAR_EXT_HEADER];
- char isextended;
-@};
-
projects / tar / blobdiff