/* GNU tar Archive Format description.
Copyright (C) 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
- 2000, 2001, 2003 Free Software Foundation, Inc.
+ 2000, 2001, 2003, 2004, 2005 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
- 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
/* tar Header Block, from POSIX 1003.1-1990. */
/* 500 */
};
-struct star_header
-{ /* byte offset */
- char name[100]; /* 0 */
- char mode[8]; /* 100 */
- char uid[8]; /* 108 */
- char gid[8]; /* 116 */
- char size[12]; /* 124 */
- char mtime[12]; /* 136 */
- char chksum[8]; /* 148 */
- char typeflag; /* 156 */
- char linkname[100]; /* 157 */
- char magic[6]; /* 257 */
- char version[2]; /* 263 */
- char uname[32]; /* 265 */
- char gname[32]; /* 297 */
- char devmajor[8]; /* 329 */
- char devminor[8]; /* 337 */
- char prefix[131]; /* 345 */
- char atime[12]; /* 476 */
- char ctime[12]; /* 488 */
- /* 500 */
-};
-
#define TMAGIC "ustar" /* ustar and a null */
#define TMAGLEN 6
#define TVERSION "00" /* 00 and no null */
struct oldgnu_header
{ /* byte offset */
char unused_pad1[345]; /* 0 */
- char atime[12]; /* 345 */
- char ctime[12]; /* 357 */
- char offset[12]; /* 369 */
- char longnames[4]; /* 381 */
+ char atime[12]; /* 345 Incr. archive: atime of the file */
+ char ctime[12]; /* 357 Incr. archive: ctime of the file */
+ char offset[12]; /* 369 Multivolume archive: the offset of
+ the start of this volume */
+ char longnames[4]; /* 381 Not used */
char unused_pad2; /* 385 */
struct sparse sp[SPARSES_IN_OLDGNU_HEADER];
/* 386 */
- char isextended; /* 482 */
- char realsize[12]; /* 483 */
+ char isextended; /* 482 Sparse file: Extension sparse header
+ follows */
+ char realsize[12]; /* 483 Sparse file: Real size*/
/* 495 */
};
/* This file is a tape/volume header. Ignore it on extraction. */
#define GNUTYPE_VOLHDR 'V'
+/* Solaris extended header */
+#define SOLARIS_XHDTYPE 'X'
+
+\f
+/* Jörg Schilling star header */
+
+struct star_header
+{ /* byte offset */
+ char name[100]; /* 0 */
+ char mode[8]; /* 100 */
+ char uid[8]; /* 108 */
+ char gid[8]; /* 116 */
+ char size[12]; /* 124 */
+ char mtime[12]; /* 136 */
+ char chksum[8]; /* 148 */
+ char typeflag; /* 156 */
+ char linkname[100]; /* 157 */
+ char magic[6]; /* 257 */
+ char version[2]; /* 263 */
+ char uname[32]; /* 265 */
+ char gname[32]; /* 297 */
+ char devmajor[8]; /* 329 */
+ char devminor[8]; /* 337 */
+ char prefix[131]; /* 345 */
+ char atime[12]; /* 476 */
+ char ctime[12]; /* 488 */
+ /* 500 */
+};
+
+#define SPARSES_IN_STAR_HEADER 4
+#define SPARSES_IN_STAR_EXT_HEADER 21
+
+struct star_in_header {
+ char fill[345]; /* 0 Everything that is before t_prefix */
+ char prefix[1]; /* 345 t_name prefix */
+ char fill2; /* 346 */
+ char fill3[8]; /* 347 */
+ char isextended; /* 355 */
+ struct sparse sp[SPARSES_IN_STAR_HEADER]; /* 356 */
+ char realsize[12]; /* 452 Actual size of the file */
+ char offset[12]; /* 464 Offset of multivolume contents */
+ char atime[12]; /* 476 */
+ char ctime[12]; /* 488 */
+ char mfill[8]; /* 500 */
+ char xmagic[4]; /* 508 "tar" */
+};
+
+struct star_ext_header {
+ struct sparse sp[SPARSES_IN_STAR_EXT_HEADER];
+ char isextended;
+};
+
+\f
+
/* tar Header Block, overall structure. */
/* tar files are made in basic blocks of this size. */
DEFAULT_FORMAT, /* format to be decided later */
V7_FORMAT, /* old V7 tar format */
OLDGNU_FORMAT, /* GNU format as per before tar 1.12 */
- POSIX_FORMAT, /* restricted, pure POSIX format */
+ USTAR_FORMAT, /* POSIX.1-1988 (ustar) format */
+ POSIX_FORMAT, /* POSIX.1-2001 format */
STAR_FORMAT, /* Star format defined in 1994 */
- GNU_FORMAT /* POSIX format with GNU extensions */
+ GNU_FORMAT /* Same as OLDGNU_FORMAT with one exception:
+ see FIXME note for to_chars() function
+ (create.c:189) */
};
+/* Information about a sparse file. */
+struct sp_array
+ {
+ off_t offset;
+ size_t numbytes;
+ };
+
struct tar_stat_info
{
char *orig_file_name; /* name of file read from the archive header */
trailing slash before it was normalized. */
char *link_name; /* name of link for the current archive entry. */
- unsigned int devminor; /* device minor number */
- unsigned int devmajor; /* device major number */
char *uname; /* user name of owner */
char *gname; /* group name of owner */
- struct stat stat; /* regular filesystem stat */
+ struct stat stat; /* regular filesystem stat */
+
+ off_t archive_file_size; /* Size of file as stored in the archive.
+ Equals stat.st_size for non-sparse files */
+
+ bool is_sparse; /* Is the file sparse */
+
+ size_t sparse_map_avail; /* Index to the first unused element in
+ sparse_map array. Zero if the file is
+ not sparse */
+ size_t sparse_map_size; /* Size of the sparse map */
+ struct sp_array *sparse_map;
};
union block
struct star_header star_header;
struct oldgnu_header oldgnu_header;
struct sparse_header sparse_header;
+ struct star_in_header star_in_header;
+ struct star_ext_header star_ext_header;
};
/* End of Format description. */
projects / chaz / tar / blobdiff