org.xeustechnologies.jtar
Class TarHeader

java.lang.Object
  org.xeustechnologies.jtar.TarHeader

public class TarHeader
extends java.lang.Object

Header

 Offset  Size     Field
 0       100      File name
 100     8        File mode
 108     8        Owner's numeric user ID
 116     8        Group's numeric user ID
 124     12       File size in bytes
 136     12       Last modification time in numeric Unix time format
 148     8        Checksum for header block
 156     1        Link indicator (file type)
 157     100      Name of linked file
 

File Types

 Value        Meaning
 '0'          Normal file
 (ASCII NUL)  Normal file (now obsolete)
 '1'          Hard link
 '2'          Symbolic link
 '3'          Character special
 '4'          Block special
 '5'          Directory
 '6'          FIFO
 '7'          Contigous
 

Ustar header

 Offset  Size    Field
 257     6       UStar indicator "ustar"
 263     2       UStar version "00"
 265     32      Owner user name
 297     32      Owner group name
 329     8       Device major number
 337     8       Device minor number
 345     155     Filename prefix
 

Field Summary

int	checkSum
static int	CHKSUMLEN
static int	DEVLEN
int	devMajor
int	devMinor
static int	GIDLEN
static int	GNAMELEN
static java.lang.String	GNU_TMAGIC The magic tag representing a GNU tar archive.
int	groupId
java.lang.StringBuffer	groupName
static byte	LF_BLK
static byte	LF_CHR
static byte	LF_CONTIG
static byte	LF_DIR
static byte	LF_FIFO
static byte	LF_LINK
static byte	LF_NORMAL
static byte	LF_OLDNORM
static byte	LF_SYMLINK
byte	linkFlag
java.lang.StringBuffer	linkName
java.lang.StringBuffer	magic
static int	MAGICLEN
int	mode
static int	MODELEN
long	modTime
static int	MODTIMELEN
java.lang.StringBuffer	name
static int	NAMELEN
long	size
static int	SIZELEN
static java.lang.String	TMAGIC The magic tag representing a POSIX tar archive.
static int	UIDLEN
static int	UNAMELEN
int	userId
java.lang.StringBuffer	userName

Constructor Summary

TarHeader()

Method Summary

static int	getNameBytes(java.lang.StringBuffer name, byte[] buf, int offset, int length) Determine the number of bytes in an entry name.
static java.lang.StringBuffer	parseName(byte[] header, int offset, int length) Parse an entry name from a header buffer.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NAMELEN

public static final int NAMELEN

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Constant Field Values

MODELEN

public static final int MODELEN

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Constant Field Values

UIDLEN

public static final int UIDLEN

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Constant Field Values

GIDLEN

public static final int GIDLEN

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Constant Field Values

SIZELEN

public static final int SIZELEN

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Constant Field Values

MODTIMELEN

public static final int MODTIMELEN

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Constant Field Values

CHKSUMLEN

public static final int CHKSUMLEN

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Constant Field Values

LF_OLDNORM

public static final byte LF_OLDNORM

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Constant Field Values

LF_NORMAL

public static final byte LF_NORMAL

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Constant Field Values

LF_LINK

public static final byte LF_LINK

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Constant Field Values

LF_SYMLINK

public static final byte LF_SYMLINK

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Constant Field Values

LF_CHR

public static final byte LF_CHR

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Constant Field Values

LF_BLK

public static final byte LF_BLK

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Constant Field Values

LF_DIR

public static final byte LF_DIR

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Constant Field Values

LF_FIFO

public static final byte LF_FIFO

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Constant Field Values

LF_CONTIG

public static final byte LF_CONTIG

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Constant Field Values

MAGICLEN

public static final int MAGICLEN

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Constant Field Values

TMAGIC

public static final java.lang.String TMAGIC

The magic tag representing a POSIX tar archive.

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Constant Field Values

GNU_TMAGIC

public static final java.lang.String GNU_TMAGIC

The magic tag representing a GNU tar archive.

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Constant Field Values

UNAMELEN

public static final int UNAMELEN

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Constant Field Values

GNAMELEN

public static final int GNAMELEN

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Constant Field Values

DEVLEN

public static final int DEVLEN

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Constant Field Values

name

public java.lang.StringBuffer name

mode

public int mode

userId

public int userId

groupId

public int groupId

size

public long size

modTime

public long modTime

checkSum

public int checkSum

linkFlag

public byte linkFlag

linkName

public java.lang.StringBuffer linkName

magic

public java.lang.StringBuffer magic

userName

public java.lang.StringBuffer userName

groupName

public java.lang.StringBuffer groupName

devMajor

public int devMajor

devMinor

public int devMinor

Constructor Detail

TarHeader

public TarHeader()

Method Detail

parseName

public static java.lang.StringBuffer parseName(byte[] header,
                                               int offset,
                                               int length)

Parse an entry name from a header buffer.

Parameters:

name -

header - The header buffer from which to parse.

offset - The offset into the buffer from which to parse.

length - The number of header bytes to parse.

Returns:

The header's entry name.

getNameBytes

public static int getNameBytes(java.lang.StringBuffer name,
                               byte[] buf,
                               int offset,
                               int length)

Determine the number of bytes in an entry name.

Parameters:

name -

header - The header buffer from which to parse.

offset - The offset into the buffer from which to parse.

length - The number of header bytes to parse.

Returns:

The number of bytes in a header's entry name.