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Apache Commons Compress software defines an API for working with
compression and archive formats. These include: bzip2, gzip, pack200,
lzma, xz, Snappy, traditional Unix Compress, DEFLATE, DEFLATE64, LZ4,
Brotli, Zstandard and ar, cpio, jar, tar, zip, dump, 7z, arj.
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.commons.compress.archivers.tar;
/**
* This interface contains all the definitions used in the package.
*
* For tar formats (FORMAT_OLDGNU, FORMAT_POSIX, etc.) see GNU tar
* tar.h type enum archive_format
*/
// CheckStyle:InterfaceIsTypeCheck OFF (bc)
public interface TarConstants {
/** Default record size */
int DEFAULT_RCDSIZE = 512;
/** Default block size */
int DEFAULT_BLKSIZE = DEFAULT_RCDSIZE * 20;
/**
* GNU format as per before tar 1.12.
*/
int FORMAT_OLDGNU = 2;
/**
* Pure Posix format.
*/
int FORMAT_POSIX = 3;
/**
* xstar format used by Jörg Schilling's star.
*/
int FORMAT_XSTAR = 4;
/**
* The length of the name field in a header buffer.
*/
int NAMELEN = 100;
/**
* The length of the mode field in a header buffer.
*/
int MODELEN = 8;
/**
* The length of the user id field in a header buffer.
*/
int UIDLEN = 8;
/**
* The length of the group id field in a header buffer.
*/
int GIDLEN = 8;
/**
* The maximum value of gid/uid in a tar archive which can
* be expressed in octal char notation (that's 7 sevens, octal).
*/
long MAXID = 07777777L;
/**
* The length of the checksum field in a header buffer.
*/
int CHKSUMLEN = 8;
/**
* Offset of the checksum field within header record.
* @since 1.5
*/
int CHKSUM_OFFSET = 148;
/**
* The length of the size field in a header buffer.
* Includes the trailing space or NUL.
*/
int SIZELEN = 12;
/**
* The maximum size of a file in a tar archive
* which can be expressed in octal char notation (that's 11 sevens, octal).
*/
long MAXSIZE = 077777777777L;
/** Offset of start of magic field within header record */
int MAGIC_OFFSET = 257;
/**
* The length of the magic field in a header buffer.
*/
int MAGICLEN = 6;
/** Offset of start of magic field within header record */
int VERSION_OFFSET = 263;
/**
* Previously this was regarded as part of "magic" field, but it is separate.
*/
int VERSIONLEN = 2;
/**
* The length of the modification time field in a header buffer.
*/
int MODTIMELEN = 12;
/**
* The length of the user name field in a header buffer.
*/
int UNAMELEN = 32;
/**
* The length of the group name field in a header buffer.
*/
int GNAMELEN = 32;
/**
* The length of each of the device fields (major and minor) in a header buffer.
*/
int DEVLEN = 8;
/**
* Length of the prefix field.
*
*/
int PREFIXLEN = 155;
/**
* The length of the access time field in an old GNU header buffer.
*
*/
int ATIMELEN_GNU = 12;
/**
* The length of the created time field in an old GNU header buffer.
*
*/
int CTIMELEN_GNU = 12;
/**
* The length of the multivolume start offset field in an old GNU header buffer.
*
*/
int OFFSETLEN_GNU = 12;
/**
* The length of the long names field in an old GNU header buffer.
*
*/
int LONGNAMESLEN_GNU = 4;
/**
* The length of the padding field in an old GNU header buffer.
*
*/
int PAD2LEN_GNU = 1;
/**
* The sum of the length of all sparse headers in an old GNU header buffer.
*
*/
int SPARSELEN_GNU = 96;
/**
* The length of the is extension field in an old GNU header buffer.
*
*/
int ISEXTENDEDLEN_GNU = 1;
/**
* The length of the real size field in an old GNU header buffer.
*
*/
int REALSIZELEN_GNU = 12;
/**
* The sum of the length of all sparse headers in a sparse header buffer.
*
*/
int SPARSELEN_GNU_SPARSE = 504;
/**
* The length of the is extension field in a sparse header buffer.
*
*/
int ISEXTENDEDLEN_GNU_SPARSE = 1;
/**
* LF_ constants represent the "link flag" of an entry, or more commonly,
* the "entry type". This is the "old way" of indicating a normal file.
*/
byte LF_OLDNORM = 0;
/**
* Normal file type.
*/
byte LF_NORMAL = (byte) '0';
/**
* Link file type.
*/
byte LF_LINK = (byte) '1';
/**
* Symbolic link file type.
*/
byte LF_SYMLINK = (byte) '2';
/**
* Character device file type.
*/
byte LF_CHR = (byte) '3';
/**
* Block device file type.
*/
byte LF_BLK = (byte) '4';
/**
* Directory file type.
*/
byte LF_DIR = (byte) '5';
/**
* FIFO (pipe) file type.
*/
byte LF_FIFO = (byte) '6';
/**
* Contiguous file type.
*/
byte LF_CONTIG = (byte) '7';
/**
* Identifies the *next* file on the tape as having a long linkname.
*/
byte LF_GNUTYPE_LONGLINK = (byte) 'K';
/**
* Identifies the *next* file on the tape as having a long name.
*/
byte LF_GNUTYPE_LONGNAME = (byte) 'L';
/**
* Sparse file type.
* @since 1.1.1
*/
byte LF_GNUTYPE_SPARSE = (byte) 'S';
// See "http://www.opengroup.org/onlinepubs/009695399/utilities/pax.html#tag_04_100_13_02"
/**
* Identifies the entry as a Pax extended header.
* @since 1.1
*/
byte LF_PAX_EXTENDED_HEADER_LC = (byte) 'x';
/**
* Identifies the entry as a Pax extended header (SunOS tar -E).
*
* @since 1.1
*/
byte LF_PAX_EXTENDED_HEADER_UC = (byte) 'X';
/**
* Identifies the entry as a Pax global extended header.
*
* @since 1.1
*/
byte LF_PAX_GLOBAL_EXTENDED_HEADER = (byte) 'g';
/**
* The magic tag representing a POSIX tar archive.
*/
String MAGIC_POSIX = "ustar\0";
String VERSION_POSIX = "00";
/**
* The magic tag representing a GNU tar archive.
*/
String MAGIC_GNU = "ustar ";
// Appear to be two possible GNU versions
String VERSION_GNU_SPACE = " \0";
String VERSION_GNU_ZERO = "0\0";
/**
* The magic tag representing an Ant tar archive.
*
* @since 1.1
*/
String MAGIC_ANT = "ustar\0";
/**
* The "version" representing an Ant tar archive.
*
* @since 1.1
*/
// Does not appear to have a version, however Ant does write 8 bytes,
// so assume the version is 2 nulls
String VERSION_ANT = "\0\0";
/**
* The name of the GNU tar entry which contains a long name.
*/
String GNU_LONGLINK = "././@LongLink"; // TODO rename as LONGLINK_GNU ?
/**
* The magix string used in the last four bytes of the header to
* identify the xstar format.
* @since 1.11
*/
String MAGIC_XSTAR = "tar\0";
/**
* Offset inside the header for the xstar magic bytes.
* @since 1.11
*/
int XSTAR_MAGIC_OFFSET = 508;
/**
* Length of the XSTAR magic.
* @since 1.11
*/
int XSTAR_MAGIC_LEN = 4;
/**
* Length of the prefix field in xstar archives.
*
* @since 1.11
*/
int PREFIXLEN_XSTAR = 131;
/**
* The length of the access time field in a xstar header buffer.
*
* @since 1.11
*/
int ATIMELEN_XSTAR = 12;
/**
* The length of the created time field in a xstar header buffer.
*
* @since 1.11
*/
int CTIMELEN_XSTAR = 12;
}