# -*- coding: iso-8859-1 -*-

#-------------------------------------------------------------------

# tarfile.py

#-------------------------------------------------------------------

# Copyright (C) 2002 Lars Gustäbel <lars@gustaebel.de>

# All rights reserved.

#

# Permission is hereby granted, free of charge, to any person

# obtaining a copy of this software and associated documentation

# files (the "Software"), to deal in the Software without

# restriction, including without limitation the rights to use,

# copy, modify, merge, publish, distribute, sublicense, and/or sell

# copies of the Software, and to permit persons to whom the

# Software is furnished to do so, subject to the following

# conditions:

#

# The above copyright notice and this permission notice shall be

# included in all copies or substantial portions of the Software.

#

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES

# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT

# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,

# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

# OTHER DEALINGS IN THE SOFTWARE.

#

"""Read from and write to tar format archives.

"""

__version__ = "$Revision: 85213 $"

# $Source$

version = "0.9.0"

__author__ = "Lars Gustäbel (lars@gustaebel.de)"

__date__ = "$Date$"

__cvsid__ = "$Id$"

__credits__ = "Gustavo Niemeyer, Niels Gustäbel, Richard Townsend."

#---------

# Imports

#---------

from __builtin__ import open as bltn_open

import sys

import os

import shutil

import stat

import errno

import time

import struct

import copy

import re

import operator

try:

import grp, pwd

except ImportError:

grp = pwd = None

# from tarfile import *

__all__ = ["TarFile", "TarInfo", "is_tarfile", "TarError"]

#---------------------------------------------------------

# tar constants

#---------------------------------------------------------

NUL = "\0" # the null character

BLOCKSIZE = 512 # length of processing blocks

RECORDSIZE = BLOCKSIZE * 20 # length of records

GNU_MAGIC = "ustar \0" # magic gnu tar string

POSIX_MAGIC = "ustar\x0000" # magic posix tar string

LENGTH_NAME = 100 # maximum length of a filename

LENGTH_LINK = 100 # maximum length of a linkname

LENGTH_PREFIX = 155 # maximum length of the prefix field

REGTYPE = "0" # regular file

AREGTYPE = "\0" # regular file

LNKTYPE = "1" # link (inside tarfile)

SYMTYPE = "2" # symbolic link

CHRTYPE = "3" # character special device

BLKTYPE = "4" # block special device

DIRTYPE = "5" # directory

FIFOTYPE = "6" # fifo special device

CONTTYPE = "7" # contiguous file

GNUTYPE_LONGNAME = "L" # GNU tar longname

GNUTYPE_LONGLINK = "K" # GNU tar longlink

GNUTYPE_SPARSE = "S" # GNU tar sparse file

XHDTYPE = "x" # POSIX.1-2001 extended header

XGLTYPE = "g" # POSIX.1-2001 global header

SOLARIS_XHDTYPE = "X" # Solaris extended header

USTAR_FORMAT = 0 # POSIX.1-1988 (ustar) format

GNU_FORMAT = 1 # GNU tar format

PAX_FORMAT = 2 # POSIX.1-2001 (pax) format

DEFAULT_FORMAT = GNU_FORMAT

#---------------------------------------------------------

# tarfile constants

#---------------------------------------------------------

# File types that tarfile supports:

SUPPORTED_TYPES = (REGTYPE, AREGTYPE, LNKTYPE,

SYMTYPE, DIRTYPE, FIFOTYPE,

CONTTYPE, CHRTYPE, BLKTYPE,

GNUTYPE_LONGNAME, GNUTYPE_LONGLINK,

GNUTYPE_SPARSE)

# File types that will be treated as a regular file.

REGULAR_TYPES = (REGTYPE, AREGTYPE,

CONTTYPE, GNUTYPE_SPARSE)

# File types that are part of the GNU tar format.

GNU_TYPES = (GNUTYPE_LONGNAME, GNUTYPE_LONGLINK,

GNUTYPE_SPARSE)

# Fields from a pax header that override a TarInfo attribute.

PAX_FIELDS = ("path", "linkpath", "size", "mtime",

"uid", "gid", "uname", "gname")

# Fields in a pax header that are numbers, all other fields

# are treated as strings.

PAX_NUMBER_FIELDS = {

"atime": float,

"ctime": float,

"mtime": float,

"uid": int,

"gid": int,

"size": int

}

#---------------------------------------------------------

# Bits used in the mode field, values in octal.

#---------------------------------------------------------

S_IFLNK = 0120000 # symbolic link

S_IFREG = 0100000 # regular file

S_IFBLK = 0060000 # block device

S_IFDIR = 0040000 # directory

S_IFCHR = 0020000 # character device

S_IFIFO = 0010000 # fifo

TSUID = 04000 # set UID on execution

TSGID = 02000 # set GID on execution

TSVTX = 01000 # reserved

TUREAD = 0400 # read by owner

TUWRITE = 0200 # write by owner

TUEXEC = 0100 # execute/search by owner

TGREAD = 0040 # read by group

TGWRITE = 0020 # write by group

TGEXEC = 0010 # execute/search by group

TOREAD = 0004 # read by other

TOWRITE = 0002 # write by other

TOEXEC = 0001 # execute/search by other

#---------------------------------------------------------

# initialization

#---------------------------------------------------------

ENCODING = sys.getfilesystemencoding()

if ENCODING is None:

ENCODING = sys.getdefaultencoding()

#---------------------------------------------------------

# Some useful functions

#---------------------------------------------------------

def stn(s, length):

"""Convert a python string to a null-terminated string buffer.

"""

return s[:length] + (length - len(s)) * NUL

def nts(s):

"""Convert a null-terminated string field to a python string.

"""

# Use the string up to the first null char.

p = s.find("\0")

if p == -1:

return s

return s[:p]

def nti(s):

"""Convert a number field to a python number.

"""

# There are two possible encodings for a number field, see

# itn() below.

if s[0] != chr(0200):

try:

n = int(nts(s).strip() or "0", 8)

except ValueError:

raise InvalidHeaderError("invalid header")

else:

n = 0L

for i in xrange(len(s) - 1):

n <<= 8

n += ord(s[i + 1])

return n

def itn(n, digits=8, format=DEFAULT_FORMAT):

"""Convert a python number to a number field.

"""

# POSIX 1003.1-1988 requires numbers to be encoded as a string of

# octal digits followed by a null-byte, this allows values up to

# (8**(digits-1))-1. GNU tar allows storing numbers greater than

# that if necessary. A leading 0200 byte indicates this particular

# encoding, the following digits-1 bytes are a big-endian

# representation. This allows values up to (256**(digits-1))-1.

if 0 <= n < 8 ** (digits - 1):

s = "%0*o" % (digits - 1, n) + NUL

else:

if format != GNU_FORMAT or n >= 256 ** (digits - 1):

raise ValueError("overflow in number field")

if n < 0:

# XXX We mimic GNU tar's behaviour with negative numbers,

# this could raise OverflowError.

n = struct.unpack("L", struct.pack("l", n))[0]

s = ""

for i in xrange(digits - 1):

s = chr(n & 0377) + s

n >>= 8

s = chr(0200) + s

return s

def uts(s, encoding, errors):

"""Convert a unicode object to a string.

"""

if errors == "utf-8":

# An extra error handler similar to the -o invalid=UTF-8 option

# in POSIX.1-2001. Replace untranslatable characters with their

# UTF-8 representation.

try:

return s.encode(encoding, "strict")

except UnicodeEncodeError:

x = []

for c in s:

try:

x.append(c.encode(encoding, "strict"))

except UnicodeEncodeError:

x.append(c.encode("utf8"))

return "".join(x)

else:

return s.encode(encoding, errors)

def calc_chksums(buf):

"""Calculate the checksum for a member's header by summing up all

characters except for the chksum field which is treated as if

it was filled with spaces. According to the GNU tar sources,

some tars (Sun and NeXT) calculate chksum with signed char,

which will be different if there are chars in the buffer with

the high bit set. So we calculate two checksums, unsigned and

signed.

"""

unsigned_chksum = 256 + sum(struct.unpack("148B", buf[:148]) + struct.unpack("356B", buf[156:512]))

signed_chksum = 256 + sum(struct.unpack("148b", buf[:148]) + struct.unpack("356b", buf[156:512]))

return unsigned_chksum, signed_chksum

def copyfileobj(src, dst, length=None):

"""Copy length bytes from fileobj src to fileobj dst.

If length is None, copy the entire content.

"""

if length == 0:

return

if length is None:

shutil.copyfileobj(src, dst)

return

BUFSIZE = 16 * 1024

blocks, remainder = divmod(length, BUFSIZE)

for b in xrange(blocks):

buf = src.read(BUFSIZE)

if len(buf) < BUFSIZE:

raise IOError("end of file reached")

dst.write(buf)

if remainder != 0:

buf = src.read(remainder)

if len(buf) < remainder:

raise IOError("end of file reached")

dst.write(buf)

return

filemode_table = (

((S_IFLNK, "l"),

(S_IFREG, "-"),

(S_IFBLK, "b"),

(S_IFDIR, "d"),

(S_IFCHR, "c"),

(S_IFIFO, "p")),

((TUREAD, "r"),),

((TUWRITE, "w"),),

((TUEXEC|TSUID, "s"),

(TSUID, "S"),

(TUEXEC, "x")),

((TGREAD, "r"),),

((TGWRITE, "w"),),

((TGEXEC|TSGID, "s"),

(TSGID, "S"),

(TGEXEC, "x")),

((TOREAD, "r"),),

((TOWRITE, "w"),),

((TOEXEC|TSVTX, "t"),

(TSVTX, "T"),

(TOEXEC, "x"))

)

def filemode(mode):

"""Convert a file's mode to a string of the form

-rwxrwxrwx.

Used by TarFile.list()

"""

perm = []

for table in filemode_table:

for bit, char in table:

if mode & bit == bit:

perm.append(char)

break

else:

perm.append("-")

return "".join(perm)

class TarError(Exception):

"""Base exception."""

pass

class ExtractError(TarError):

"""General exception for extract errors."""

pass

class ReadError(TarError):

"""Exception for unreadable tar archives."""

pass

class CompressionError(TarError):

"""Exception for unavailable compression methods."""

pass

class StreamError(TarError):

"""Exception for unsupported operations on stream-like TarFiles."""

pass

class HeaderError(TarError):

"""Base exception for header errors."""

pass

class EmptyHeaderError(HeaderError):

"""Exception for empty headers."""

pass

class TruncatedHeaderError(HeaderError):

"""Exception for truncated headers."""

pass

class EOFHeaderError(HeaderError):

"""Exception for end of file headers."""

pass

class InvalidHeaderError(HeaderError):

"""Exception for invalid headers."""

pass

class SubsequentHeaderError(HeaderError):

"""Exception for missing and invalid extended headers."""

pass

#---------------------------

# internal stream interface

#---------------------------

class _LowLevelFile:

"""Low-level file object. Supports reading and writing.

It is used instead of a regular file object for streaming

access.

"""

def __init__(self, name, mode):

mode = {

"r": os.O_RDONLY,

"w": os.O_WRONLY | os.O_CREAT | os.O_TRUNC,

}[mode]

if hasattr(os, "O_BINARY"):

mode |= os.O_BINARY

self.fd = os.open(name, mode, 0666)

def close(self):

os.close(self.fd)

def read(self, size):

return os.read(self.fd, size)

def write(self, s):

os.write(self.fd, s)

class _Stream:

"""Class that serves as an adapter between TarFile and

a stream-like object. The stream-like object only

needs to have a read() or write() method and is accessed

blockwise. Use of gzip or bzip2 compression is possible.

A stream-like object could be for example: sys.stdin,

sys.stdout, a socket, a tape device etc.

_Stream is intended to be used only internally.

"""

def __init__(self, name, mode, comptype, fileobj, bufsize):

"""Construct a _Stream object.

"""

self._extfileobj = True

if fileobj is None:

fileobj = _LowLevelFile(name, mode)

self._extfileobj = False

if comptype == '*':

# Enable transparent compression detection for the

# stream interface

fileobj = _StreamProxy(fileobj)

comptype = fileobj.getcomptype()

self.name = name or ""

self.mode = mode

self.comptype = comptype

self.fileobj = fileobj

self.bufsize = bufsize

self.buf = ""

self.pos = 0L

self.closed = False

try:

if comptype == "gz":

try:

import zlib

except ImportError:

raise CompressionError("zlib module is not available")

self.zlib = zlib

self.crc = zlib.crc32("") & 0xffffffffL

if mode == "r":

self._init_read_gz()

else:

self._init_write_gz()

elif comptype == "bz2":

try:

import bz2

except ImportError:

raise CompressionError("bz2 module is not available")

if mode == "r":

self.dbuf = ""

self.cmp = bz2.BZ2Decompressor()

else:

self.cmp = bz2.BZ2Compressor()

except:

if not self._extfileobj:

self.fileobj.close()

self.closed = True

raise

def __del__(self):

if hasattr(self, "closed") and not self.closed:

self.close()

def _init_write_gz(self):

"""Initialize for writing with gzip compression.

"""

self.cmp = self.zlib.compressobj(9, self.zlib.DEFLATED,

-self.zlib.MAX_WBITS,

self.zlib.DEF_MEM_LEVEL,

0)

timestamp = struct.pack("<L", long(time.time()))

self.__write("\037\213\010\010%s\002\377" % timestamp)

if type(self.name) is unicode:

self.name = self.name.encode("iso-8859-1", "replace")

if self.name.endswith(".gz"):

self.name = self.name[:-3]

self.__write(self.name + NUL)

def write(self, s):

"""Write string s to the stream.

"""

if self.comptype == "gz":

self.crc = self.zlib.crc32(s, self.crc) & 0xffffffffL

self.pos += len(s)

if self.comptype != "tar":

s = self.cmp.compress(s)

self.__write(s)

def __write(self, s):

"""Write string s to the stream if a whole new block

is ready to be written.

"""

self.buf += s

while len(self.buf) > self.bufsize:

self.fileobj.write(self.buf[:self.bufsize])

self.buf = self.buf[self.bufsize:]

def close(self):

"""Close the _Stream object. No operation should be

done on it afterwards.

"""

if self.closed:

return

self.closed = True

try:

if self.mode == "w" and self.comptype != "tar":

self.buf += self.cmp.flush()

if self.mode == "w" and self.buf:

self.fileobj.write(self.buf)

self.buf = ""

if self.comptype == "gz":

# The native zlib crc is an unsigned 32-bit integer, but

# the Python wrapper implicitly casts that to a signed C

# long. So, on a 32-bit box self.crc may "look negative",

# while the same crc on a 64-bit box may "look positive".

# To avoid irksome warnings from the `struct` module, force

# it to look positive on all boxes.

self.fileobj.write(struct.pack("<L", self.crc & 0xffffffffL))

self.fileobj.write(struct.pack("<L", self.pos & 0xffffFFFFL))

finally:

if not self._extfileobj:

self.fileobj.close()

def _init_read_gz(self):

"""Initialize for reading a gzip compressed fileobj.

"""

self.cmp = self.zlib.decompressobj(-self.zlib.MAX_WBITS)

self.dbuf = ""

# taken from gzip.GzipFile with some alterations

if self.__read(2) != "\037\213":

raise ReadError("not a gzip file")

if self.__read(1) != "\010":

raise CompressionError("unsupported compression method")

flag = ord(self.__read(1))

self.__read(6)

if flag & 4:

xlen = ord(self.__read(1)) + 256 * ord(self.__read(1))

self.read(xlen)

if flag & 8:

while True:

s = self.__read(1)

if not s or s == NUL:

break

if flag & 16:

while True:

s = self.__read(1)

if not s or s == NUL:

break

if flag & 2:

self.__read(2)

def tell(self):

"""Return the stream's file pointer position.

"""

return self.pos

def seek(self, pos=0):

"""Set the stream's file pointer to pos. Negative seeking

is forbidden.

"""

if pos - self.pos >= 0:

blocks, remainder = divmod(pos - self.pos, self.bufsize)

for i in xrange(blocks):

self.read(self.bufsize)

self.read(remainder)

else:

raise StreamError("seeking backwards is not allowed")

return self.pos

def read(self, size=None):

"""Return the next size number of bytes from the stream.

If size is not defined, return all bytes of the stream

up to EOF.

"""

if size is None:

t = []

while True:

buf = self._read(self.bufsize)

if not buf:

break

t.append(buf)

buf = "".join(t)

else:

buf = self._read(size)

self.pos += len(buf)

return buf

def _read(self, size):

"""Return size bytes from the stream.

"""

if self.comptype == "tar":

return self.__read(size)

c = len(self.dbuf)

t = [self.dbuf]

while c < size:

buf = self.__read(self.bufsize)

if not buf:

break

try:

buf = self.cmp.decompress(buf)

except IOError:

raise ReadError("invalid compressed data")

t.append(buf)

c += len(buf)

t = "".join(t)

self.dbuf = t[size:]

return t[:size]

def __read(self, size):

"""Return size bytes from stream. If internal buffer is empty,

read another block from the stream.

"""

c = len(self.buf)

t = [self.buf]

while c < size:

buf = self.fileobj.read(self.bufsize)

if not buf:

break

t.append(buf)

c += len(buf)

t = "".join(t)

self.buf = t[size:]

return t[:size]

# class _Stream

class _StreamProxy(object):

"""Small proxy class that enables transparent compression

detection for the Stream interface (mode 'r|*').

"""

def __init__(self, fileobj):

self.fileobj = fileobj

self.buf = self.fileobj.read(BLOCKSIZE)

def read(self, size):

self.read = self.fileobj.read

return self.buf

def getcomptype(self):

if self.buf.startswith("\037\213\010"):

return "gz"

if self.buf[0:3] == "BZh" and self.buf[4:10] == "1AY&SY":

return "bz2"

return "tar"

def close(self):

self.fileobj.close()

# class StreamProxy

class _BZ2Proxy(object):

"""Small proxy class that enables external file object

support for "r:bz2" and "w:bz2" modes. This is actually

a workaround for a limitation in bz2 module's BZ2File

class which (unlike gzip.GzipFile) has no support for

a file object argument.

"""

blocksize = 16 * 1024

def __init__(self, fileobj, mode):

self.fileobj = fileobj

self.mode = mode

self.name = getattr(self.fileobj, "name", None)

self.init()

def init(self):

import bz2

self.pos = 0

if self.mode == "r":

self.bz2obj = bz2.BZ2Decompressor()

self.fileobj.seek(0)

self.buf = ""

else:

self.bz2obj = bz2.BZ2Compressor()

def read(self, size):

b = [self.buf]

x = len(self.buf)

while x < size:

raw = self.fileobj.read(self.blocksize)

if not raw:

break

data = self.bz2obj.decompress(raw)

b.append(data)

x += len(data)

self.buf = "".join(b)

buf = self.buf[:size]

self.buf = self.buf[size:]

self.pos += len(buf)

return buf

def seek(self, pos):

if pos < self.pos:

self.init()

self.read(pos - self.pos)

def tell(self):

return self.pos

def write(self, data):

self.pos += len(data)

raw = self.bz2obj.compress(data)

self.fileobj.write(raw)

def close(self):

if self.mode == "w":

raw = self.bz2obj.flush()

self.fileobj.write(raw)

# class _BZ2Proxy

#------------------------

# Extraction file object

#------------------------

class _FileInFile(object):

"""A thin wrapper around an existing file object that

provides a part of its data as an individual file

object.

"""

def __init__(self, fileobj, offset, size, sparse=None):

self.fileobj = fileobj

self.offset = offset

self.size = size

self.sparse = sparse

self.position = 0

def tell(self):

"""Return the current file position.

"""

return self.position

def seek(self, position):

"""Seek to a position in the file.

"""

self.position = position

def read(self, size=None):

"""Read data from the file.

"""

if size is None:

size = self.size - self.position

else:

size = min(size, self.size - self.position)

if self.sparse is None:

return self.readnormal(size)

else:

return self.readsparse(size)

def __read(self, size):

buf = self.fileobj.read(size)

if len(buf) != size:

raise ReadError("unexpected end of data")

return buf

def readnormal(self, size):

"""Read operation for regular files.

"""

self.fileobj.seek(self.offset + self.position)

self.position += size

return self.__read(size)

def readsparse(self, size):

"""Read operation for sparse files.

"""

data = []

while size > 0:

buf = self.readsparsesection(size)

if not buf:

break

size -= len(buf)

data.append(buf)

return "".join(data)

def readsparsesection(self, size):

"""Read a single section of a sparse file.

"""

section = self.sparse.find(self.position)

if section is None:

return ""

size = min(size, section.offset + section.size - self.position)

if isinstance(section, _data):

realpos = section.realpos + self.position - section.offset

self.fileobj.seek(self.offset + realpos)

self.position += size

return self.__read(size)

else:

self.position += size

return NUL * size

#class _FileInFile

class ExFileObject(object):

"""File-like object for reading an archive member.

Is returned by TarFile.extractfile().

"""

blocksize = 1024

def __init__(self, tarfile, tarinfo):

self.fileobj = _FileInFile(tarfile.fileobj,

tarinfo.offset_data,

tarinfo.size,

getattr(tarinfo, "sparse", None))

self.name = tarinfo.name

self.mode = "r"

self.closed = False

self.size = tarinfo.size

self.position = 0

self.buffer = ""

def read(self, size=None):

"""Read at most size bytes from the file. If size is not

present or None, read all data until EOF is reached.

"""

if self.closed:

raise ValueError("I/O operation on closed file")

buf = ""

if self.buffer:

if size is None:

buf = self.buffer

self.buffer = ""

else:

buf = self.buffer[:size]

self.buffer = self.buffer[size:]

if size is None:

buf += self.fileobj.read()

else:

buf += self.fileobj.read(size - len(buf))

self.position += len(buf)

return buf

def readline(self, size=-1):

"""Read one entire line from the file. If size is present

and non-negative, return a string with at most that

size, which may be an incomplete line.

"""

if self.closed:

raise ValueError("I/O operation on closed file")

if "\n" in self.buffer:

pos = self.buffer.find("\n") + 1

else:

buffers = [self.buffer]

while True:

buf = self.fileobj.read(self.blocksize)

buffers.append(buf)

if not buf or "\n" in buf:

self.buffer = "".join(buffers)

pos = self.buffer.find("\n") + 1

if pos == 0:

# no newline found.

pos = len(self.buffer)

break

if size != -1:

pos = min(size, pos)

buf = self.buffer[:pos]

self.buffer = self.buffer[pos:]

self.position += len(buf)

return buf

def readlines(self):

"""Return a list with all remaining lines.

"""

result = []

while True:

line = self.readline()

if not line: break

result.append(line)

return result

def tell(self):

"""Return the current file position.

"""

if self.closed:

raise ValueError("I/O operation on closed file")

return self.position

def seek(self, pos, whence=os.SEEK_SET):

"""Seek to a position in the file.

"""

if self.closed:

raise ValueError("I/O operation on closed file")

if whence == os.SEEK_SET:

self.position = min(max(pos, 0), self.size)

elif whence == os.SEEK_CUR:

if pos < 0:

self.position = max(self.position + pos, 0)

else:

self.position = min(self.position + pos, self.size)

elif whence == os.SEEK_END:

self.position = max(min(self.size + pos, self.size), 0)

else:

raise ValueError("Invalid argument")

self.buffer = ""

self.fileobj.seek(self.position)

def close(self):

"""Close the file object.

"""

self.closed = True

def __iter__(self):

"""Get an iterator over the file's lines.

"""

while True:

line = self.readline()

if not line:

break

yield line

#class ExFileObject

#------------------

# Exported Classes

#------------------

class TarInfo(object):

"""Informational class which holds the details about an

archive member given by a tar header block.

TarInfo objects are returned by TarFile.getmember(),

TarFile.getmembers() and TarFile.gettarinfo() and are

usually created internally.

"""

def __init__(self, name=""):

"""Construct a TarInfo object. name is the optional name

of the member.

"""

self.name = name # member name

self.mode = 0644 # file permissions

self.uid = 0 # user id

self.gid = 0 # group id

self.size = 0 # file size

self.mtime = 0 # modification time

self.chksum = 0 # header checksum

self.type = REGTYPE # member type

self.linkname = "" # link name

self.uname = "" # user name

self.gname = "" # group name

self.devmajor = 0 # device major number

self.devminor = 0 # device minor number

self.offset = 0 # the tar header starts here

self.offset_data = 0 # the file's data starts here

self.pax_headers = {} # pax header information

# In pax headers the "name" and "linkname" field are called

# "path" and "linkpath".

def _getpath(self):

return self.name

def _setpath(self, name):

self.name = name

path = property(_getpath, _setpath)

def _getlinkpath(self):

return self.linkname

def _setlinkpath(self, linkname):

self.linkname = linkname

linkpath = property(_getlinkpath, _setlinkpath)

def __repr__(self):

return "<%s %r at %#x>" % (self.__class__.__name__,self.name,id(self))

def get_info(self, encoding, errors):

"""Return the TarInfo's attributes as a dictionary.

"""

info = {

"name": self.name,

"mode": self.mode & 07777,

"uid": self.uid,

"gid": self.gid,

"size": self.size,

"mtime": self.mtime,

"chksum": self.chksum,

"type": self.type,

"linkname": self.linkname,

"uname": self.uname,

"gname": self.gname,

"devmajor": self.devmajor,

"devminor": self.devminor

}

if info["type"] == DIRTYPE and not info["name"].endswith("/"):

info["name"] += "/"

for key in ("name", "linkname", "uname", "gname"):

if type(info[key]) is unicode:

info[key] = info[key].encode(encoding, errors)

return info

def tobuf(self, format=DEFAULT_FORMAT, encoding=ENCODING, errors="strict"):