--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Lib/tarfile.py Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,2531 @@
+#!/usr/bin/env python
+# -*- 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: 65514 $"
+# $Source$
+
+version = "0.9.0"
+__author__ = "Lars Gustäbel (lars@gustaebel.de)"
+__date__ = "$Date: 2008-08-04 17:23:07 -0400 (Mon, 04 Aug 2008) $"
+__cvsid__ = "$Id: tarfile.py 65514 2008-08-04 21:23:07Z brett.cannon $"
+__credits__ = "Gustavo Niemeyer, Niels Gustäbel, Richard Townsend."
+
+#---------
+# Imports
+#---------
+import sys
+import os
+import shutil
+import stat
+import errno
+import time
+import struct
+import copy
+import re
+import operator
+
+if sys.platform == 'mac':
+ # This module needs work for MacOS9, especially in the area of pathname
+ # handling. In many places it is assumed a simple substitution of / by the
+ # local os.path.sep is good enough to convert pathnames, but this does not
+ # work with the mac rooted:path:name versus :nonrooted:path:name syntax
+ raise ImportError, "tarfile does not work for platform==mac"
+
+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) or "0", 8)
+ except ValueError:
+ raise HeaderError("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)
+
+if os.sep != "/":
+ normpath = lambda path: os.path.normpath(path).replace(os.sep, "/")
+else:
+ normpath = os.path.normpath
+
+class TarError(Exception):
+ """Base exception."""
+ pass
+class ExtractError(TarError):
+ """General exception for extract errors."""
+ pass
+class ReadError(TarError):
+ """Exception for unreadble 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):
+ """Exception for invalid 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)
+
+ 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
+
+ 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()
+
+ if 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()
+
+ 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 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
+
+ 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))
+
+ if not self._extfileobj:
+ self.fileobj.close()
+
+ self.closed = True
+
+ 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.startswith("BZh91"):
+ 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:
+ try:
+ raw = self.fileobj.read(self.blocksize)
+ data = self.bz2obj.decompress(raw)
+ b.append(data)
+ except EOFError:
+ break
+ 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 readnormal(self, size):
+ """Read operation for regular files.
+ """
+ self.fileobj.seek(self.offset + self.position)
+ self.position += size
+ return self.fileobj.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.fileobj.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 = "root" # user name
+ self.gname = "root" # 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": normpath(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": normpath(self.linkname) if self.linkname else "",
+ "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"):
+ """Return a tar header as a string of 512 byte blocks.
+ """
+ info = self.get_info(encoding, errors)
+
+ if format == USTAR_FORMAT:
+ return self.create_ustar_header(info)
+ elif format == GNU_FORMAT:
+ return self.create_gnu_header(info)
+ elif format == PAX_FORMAT:
+ return self.create_pax_header(info, encoding, errors)
+ else:
+ raise ValueError("invalid format")
+
+ def create_ustar_header(self, info):
+ """Return the object as a ustar header block.
+ """
+ info["magic"] = POSIX_MAGIC
+
+ if len(info["linkname"]) > LENGTH_LINK:
+ raise ValueError("linkname is too long")
+
+ if len(info["name"]) > LENGTH_NAME:
+ info["prefix"], info["name"] = self._posix_split_name(info["name"])
+
+ return self._create_header(info, USTAR_FORMAT)
+
+ def create_gnu_header(self, info):
+ """Return the object as a GNU header block sequence.
+ """
+ info["magic"] = GNU_MAGIC
+
+ buf = ""
+ if len(info["linkname"]) > LENGTH_LINK:
+ buf += self._create_gnu_long_header(info["linkname"], GNUTYPE_LONGLINK)
+
+ if len(info["name"]) > LENGTH_NAME:
+ buf += self._create_gnu_long_header(info["name"], GNUTYPE_LONGNAME)
+
+ return buf + self._create_header(info, GNU_FORMAT)
+
+ def create_pax_header(self, info, encoding, errors):
+ """Return the object as a ustar header block. If it cannot be
+ represented this way, prepend a pax extended header sequence
+ with supplement information.
+ """
+ info["magic"] = POSIX_MAGIC
+ pax_headers = self.pax_headers.copy()
+
+ # Test string fields for values that exceed the field length or cannot
+ # be represented in ASCII encoding.
+ for name, hname, length in (
+ ("name", "path", LENGTH_NAME), ("linkname", "linkpath", LENGTH_LINK),
+ ("uname", "uname", 32), ("gname", "gname", 32)):
+
+ if hname in pax_headers:
+ # The pax header has priority.
+ continue
+
+ val = info[name].decode(encoding, errors)
+
+ # Try to encode the string as ASCII.
+ try:
+ val.encode("ascii")
+ except UnicodeEncodeError:
+ pax_headers[hname] = val
+ continue
+
+ if len(info[name]) > length:
+ pax_headers[hname] = val
+
+ # Test number fields for values that exceed the field limit or values
+ # that like to be stored as float.
+ for name, digits in (("uid", 8), ("gid", 8), ("size", 12), ("mtime", 12)):
+ if name in pax_headers:
+ # The pax header has priority. Avoid overflow.
+ info[name] = 0
+ continue
+
+ val = info[name]
+ if not 0 <= val < 8 ** (digits - 1) or isinstance(val, float):
+ pax_headers[name] = unicode(val)
+ info[name] = 0
+
+ # Create a pax extended header if necessary.
+ if pax_headers:
+ buf = self._create_pax_generic_header(pax_headers)
+ else:
+ buf = ""
+
+ return buf + self._create_header(info, USTAR_FORMAT)
+
+ @classmethod
+ def create_pax_global_header(cls, pax_headers):
+ """Return the object as a pax global header block sequence.
+ """
+ return cls._create_pax_generic_header(pax_headers, type=XGLTYPE)
+
+ def _posix_split_name(self, name):
+ """Split a name longer than 100 chars into a prefix
+ and a name part.
+ """
+ prefix = name[:LENGTH_PREFIX + 1]
+ while prefix and prefix[-1] != "/":
+ prefix = prefix[:-1]
+
+ name = name[len(prefix):]
+ prefix = prefix[:-1]
+
+ if not prefix or len(name) > LENGTH_NAME:
+ raise ValueError("name is too long")
+ return prefix, name
+
+ @staticmethod
+ def _create_header(info, format):
+ """Return a header block. info is a dictionary with file
+ information, format must be one of the *_FORMAT constants.
+ """
+ parts = [
+ stn(info.get("name", ""), 100),
+ itn(info.get("mode", 0) & 07777, 8, format),
+ itn(info.get("uid", 0), 8, format),
+ itn(info.get("gid", 0), 8, format),
+ itn(info.get("size", 0), 12, format),
+ itn(info.get("mtime", 0), 12, format),
+ " ", # checksum field
+ info.get("type", REGTYPE),
+ stn(info.get("linkname", ""), 100),
+ stn(info.get("magic", POSIX_MAGIC), 8),
+ stn(info.get("uname", "root"), 32),
+ stn(info.get("gname", "root"), 32),
+ itn(info.get("devmajor", 0), 8, format),
+ itn(info.get("devminor", 0), 8, format),
+ stn(info.get("prefix", ""), 155)
+ ]
+
+ buf = struct.pack("%ds" % BLOCKSIZE, "".join(parts))
+ chksum = calc_chksums(buf[-BLOCKSIZE:])[0]
+ buf = buf[:-364] + "%06o\0" % chksum + buf[-357:]
+ return buf
+
+ @staticmethod
+ def _create_payload(payload):
+ """Return the string payload filled with zero bytes
+ up to the next 512 byte border.
+ """
+ blocks, remainder = divmod(len(payload), BLOCKSIZE)
+ if remainder > 0:
+ payload += (BLOCKSIZE - remainder) * NUL
+ return payload
+
+ @classmethod
+ def _create_gnu_long_header(cls, name, type):
+ """Return a GNUTYPE_LONGNAME or GNUTYPE_LONGLINK sequence
+ for name.
+ """
+ name += NUL
+
+ info = {}
+ info["name"] = "././@LongLink"
+ info["type"] = type
+ info["size"] = len(name)
+ info["magic"] = GNU_MAGIC
+
+ # create extended header + name blocks.
+ return cls._create_header(info, USTAR_FORMAT) + \
+ cls._create_payload(name)
+
+ @classmethod
+ def _create_pax_generic_header(cls, pax_headers, type=XHDTYPE):
+ """Return a POSIX.1-2001 extended or global header sequence
+ that contains a list of keyword, value pairs. The values
+ must be unicode objects.
+ """
+ records = []
+ for keyword, value in pax_headers.iteritems():
+ keyword = keyword.encode("utf8")
+ value = value.encode("utf8")
+ l = len(keyword) + len(value) + 3 # ' ' + '=' + '\n'
+ n = p = 0
+ while True:
+ n = l + len(str(p))
+ if n == p:
+ break
+ p = n
+ records.append("%d %s=%s\n" % (p, keyword, value))
+ records = "".join(records)
+
+ # We use a hardcoded "././@PaxHeader" name like star does
+ # instead of the one that POSIX recommends.
+ info = {}
+ info["name"] = "././@PaxHeader"
+ info["type"] = type
+ info["size"] = len(records)
+ info["magic"] = POSIX_MAGIC
+
+ # Create pax header + record blocks.
+ return cls._create_header(info, USTAR_FORMAT) + \
+ cls._create_payload(records)
+
+ @classmethod
+ def frombuf(cls, buf):
+ """Construct a TarInfo object from a 512 byte string buffer.
+ """
+ if len(buf) != BLOCKSIZE:
+ raise HeaderError("truncated header")
+ if buf.count(NUL) == BLOCKSIZE:
+ raise HeaderError("empty header")
+
+ chksum = nti(buf[148:156])
+ if chksum not in calc_chksums(buf):
+ raise HeaderError("bad checksum")
+
+ obj = cls()
+ obj.buf = buf
+ obj.name = nts(buf[0:100])
+ obj.mode = nti(buf[100:108])
+ obj.uid = nti(buf[108:116])
+ obj.gid = nti(buf[116:124])
+ obj.size = nti(buf[124:136])
+ obj.mtime = nti(buf[136:148])
+ obj.chksum = chksum
+ obj.type = buf[156:157]
+ obj.linkname = nts(buf[157:257])
+ obj.uname = nts(buf[265:297])
+ obj.gname = nts(buf[297:329])
+ obj.devmajor = nti(buf[329:337])
+ obj.devminor = nti(buf[337:345])
+ prefix = nts(buf[345:500])
+
+ # Old V7 tar format represents a directory as a regular
+ # file with a trailing slash.
+ if obj.type == AREGTYPE and obj.name.endswith("/"):
+ obj.type = DIRTYPE
+
+ # Remove redundant slashes from directories.
+ if obj.isdir():
+ obj.name = obj.name.rstrip("/")
+
+ # Reconstruct a ustar longname.
+ if prefix and obj.type not in GNU_TYPES:
+ obj.name = prefix + "/" + obj.name
+ return obj
+
+ @classmethod
+ def fromtarfile(cls, tarfile):
+ """Return the next TarInfo object from TarFile object
+ tarfile.
+ """
+ buf = tarfile.fileobj.read(BLOCKSIZE)
+ if not buf:
+ return
+ obj = cls.frombuf(buf)
+ obj.offset = tarfile.fileobj.tell() - BLOCKSIZE
+ return obj._proc_member(tarfile)
+
+ #--------------------------------------------------------------------------
+ # The following are methods that are called depending on the type of a
+ # member. The entry point is _proc_member() which can be overridden in a
+ # subclass to add custom _proc_*() methods. A _proc_*() method MUST
+ # implement the following
+ # operations:
+ # 1. Set self.offset_data to the position where the data blocks begin,
+ # if there is data that follows.
+ # 2. Set tarfile.offset to the position where the next member's header will
+ # begin.
+ # 3. Return self or another valid TarInfo object.
+ def _proc_member(self, tarfile):
+ """Choose the right processing method depending on
+ the type and call it.
+ """
+ if self.type in (GNUTYPE_LONGNAME, GNUTYPE_LONGLINK):
+ return self._proc_gnulong(tarfile)
+ elif self.type == GNUTYPE_SPARSE:
+ return self._proc_sparse(tarfile)
+ elif self.type in (XHDTYPE, XGLTYPE, SOLARIS_XHDTYPE):
+ return self._proc_pax(tarfile)
+ else:
+ return self._proc_builtin(tarfile)
+
+ def _proc_builtin(self, tarfile):
+ """Process a builtin type or an unknown type which
+ will be treated as a regular file.
+ """
+ self.offset_data = tarfile.fileobj.tell()
+ offset = self.offset_data
+ if self.isreg() or self.type not in SUPPORTED_TYPES:
+ # Skip the following data blocks.
+ offset += self._block(self.size)
+ tarfile.offset = offset
+
+ # Patch the TarInfo object with saved global
+ # header information.
+ self._apply_pax_info(tarfile.pax_headers, tarfile.encoding, tarfile.errors)
+
+ return self
+
+ def _proc_gnulong(self, tarfile):
+ """Process the blocks that hold a GNU longname
+ or longlink member.
+ """
+ buf = tarfile.fileobj.read(self._block(self.size))
+
+ # Fetch the next header and process it.
+ next = self.fromtarfile(tarfile)
+ if next is None:
+ raise HeaderError("missing subsequent header")
+
+ # Patch the TarInfo object from the next header with
+ # the longname information.
+ next.offset = self.offset
+ if self.type == GNUTYPE_LONGNAME:
+ next.name = nts(buf)
+ elif self.type == GNUTYPE_LONGLINK:
+ next.linkname = nts(buf)
+
+ return next
+
+ def _proc_sparse(self, tarfile):
+ """Process a GNU sparse header plus extra headers.
+ """
+ buf = self.buf
+ sp = _ringbuffer()
+ pos = 386
+ lastpos = 0L
+ realpos = 0L
+ # There are 4 possible sparse structs in the
+ # first header.
+ for i in xrange(4):
+ try:
+ offset = nti(buf[pos:pos + 12])
+ numbytes = nti(buf[pos + 12:pos + 24])
+ except ValueError:
+ break
+ if offset > lastpos:
+ sp.append(_hole(lastpos, offset - lastpos))
+ sp.append(_data(offset, numbytes, realpos))
+ realpos += numbytes
+ lastpos = offset + numbytes
+ pos += 24
+
+ isextended = ord(buf[482])
+ origsize = nti(buf[483:495])
+
+ # If the isextended flag is given,
+ # there are extra headers to process.
+ while isextended == 1:
+ buf = tarfile.fileobj.read(BLOCKSIZE)
+ pos = 0
+ for i in xrange(21):
+ try:
+ offset = nti(buf[pos:pos + 12])
+ numbytes = nti(buf[pos + 12:pos + 24])
+ except ValueError:
+ break
+ if offset > lastpos:
+ sp.append(_hole(lastpos, offset - lastpos))
+ sp.append(_data(offset, numbytes, realpos))
+ realpos += numbytes
+ lastpos = offset + numbytes
+ pos += 24
+ isextended = ord(buf[504])
+
+ if lastpos < origsize:
+ sp.append(_hole(lastpos, origsize - lastpos))
+
+ self.sparse = sp
+
+ self.offset_data = tarfile.fileobj.tell()
+ tarfile.offset = self.offset_data + self._block(self.size)
+ self.size = origsize
+
+ return self
+
+ def _proc_pax(self, tarfile):
+ """Process an extended or global header as described in
+ POSIX.1-2001.
+ """
+ # Read the header information.
+ buf = tarfile.fileobj.read(self._block(self.size))
+
+ # A pax header stores supplemental information for either
+ # the following file (extended) or all following files
+ # (global).
+ if self.type == XGLTYPE:
+ pax_headers = tarfile.pax_headers
+ else:
+ pax_headers = tarfile.pax_headers.copy()
+
+ # Parse pax header information. A record looks like that:
+ # "%d %s=%s\n" % (length, keyword, value). length is the size
+ # of the complete record including the length field itself and
+ # the newline. keyword and value are both UTF-8 encoded strings.
+ regex = re.compile(r"(\d+) ([^=]+)=", re.U)
+ pos = 0
+ while True:
+ match = regex.match(buf, pos)
+ if not match:
+ break
+
+ length, keyword = match.groups()
+ length = int(length)
+ value = buf[match.end(2) + 1:match.start(1) + length - 1]
+
+ keyword = keyword.decode("utf8")
+ value = value.decode("utf8")
+
+ pax_headers[keyword] = value
+ pos += length
+
+ # Fetch the next header.
+ next = self.fromtarfile(tarfile)
+
+ if self.type in (XHDTYPE, SOLARIS_XHDTYPE):
+ if next is None:
+ raise HeaderError("missing subsequent header")
+
+ # Patch the TarInfo object with the extended header info.
+ next._apply_pax_info(pax_headers, tarfile.encoding, tarfile.errors)
+ next.offset = self.offset
+
+ if "size" in pax_headers:
+ # If the extended header replaces the size field,
+ # we need to recalculate the offset where the next
+ # header starts.
+ offset = next.offset_data
+ if next.isreg() or next.type not in SUPPORTED_TYPES:
+ offset += next._block(next.size)
+ tarfile.offset = offset
+
+ return next
+
+ def _apply_pax_info(self, pax_headers, encoding, errors):
+ """Replace fields with supplemental information from a previous
+ pax extended or global header.
+ """
+ for keyword, value in pax_headers.iteritems():
+ if keyword not in PAX_FIELDS:
+ continue
+
+ if keyword == "path":
+ value = value.rstrip("/")
+
+ if keyword in PAX_NUMBER_FIELDS:
+ try:
+ value = PAX_NUMBER_FIELDS[keyword](value)
+ except ValueError:
+ value = 0
+ else:
+ value = uts(value, encoding, errors)
+
+ setattr(self, keyword, value)
+
+ self.pax_headers = pax_headers.copy()
+
+ def _block(self, count):
+ """Round up a byte count by BLOCKSIZE and return it,
+ e.g. _block(834) => 1024.
+ """
+ blocks, remainder = divmod(count, BLOCKSIZE)
+ if remainder:
+ blocks += 1
+ return blocks * BLOCKSIZE
+
+ def isreg(self):
+ return self.type in REGULAR_TYPES
+ def isfile(self):
+ return self.isreg()
+ def isdir(self):
+ return self.type == DIRTYPE
+ def issym(self):
+ return self.type == SYMTYPE
+ def islnk(self):
+ return self.type == LNKTYPE
+ def ischr(self):
+ return self.type == CHRTYPE
+ def isblk(self):
+ return self.type == BLKTYPE
+ def isfifo(self):
+ return self.type == FIFOTYPE
+ def issparse(self):
+ return self.type == GNUTYPE_SPARSE
+ def isdev(self):
+ return self.type in (CHRTYPE, BLKTYPE, FIFOTYPE)
+# class TarInfo
+
+class TarFile(object):
+ """The TarFile Class provides an interface to tar archives.
+ """
+
+ debug = 0 # May be set from 0 (no msgs) to 3 (all msgs)
+
+ dereference = False # If true, add content of linked file to the
+ # tar file, else the link.
+
+ ignore_zeros = False # If true, skips empty or invalid blocks and
+ # continues processing.
+
+ errorlevel = 0 # If 0, fatal errors only appear in debug
+ # messages (if debug >= 0). If > 0, errors
+ # are passed to the caller as exceptions.
+
+ format = DEFAULT_FORMAT # The format to use when creating an archive.
+
+ encoding = ENCODING # Encoding for 8-bit character strings.
+
+ errors = None # Error handler for unicode conversion.
+
+ tarinfo = TarInfo # The default TarInfo class to use.
+
+ fileobject = ExFileObject # The default ExFileObject class to use.
+
+ def __init__(self, name=None, mode="r", fileobj=None, format=None,
+ tarinfo=None, dereference=None, ignore_zeros=None, encoding=None,
+ errors=None, pax_headers=None, debug=None, errorlevel=None):
+ """Open an (uncompressed) tar archive `name'. `mode' is either 'r' to
+ read from an existing archive, 'a' to append data to an existing
+ file or 'w' to create a new file overwriting an existing one. `mode'
+ defaults to 'r'.
+ If `fileobj' is given, it is used for reading or writing data. If it
+ can be determined, `mode' is overridden by `fileobj's mode.
+ `fileobj' is not closed, when TarFile is closed.
+ """
+ if len(mode) > 1 or mode not in "raw":
+ raise ValueError("mode must be 'r', 'a' or 'w'")
+ self.mode = mode
+ self._mode = {"r": "rb", "a": "r+b", "w": "wb"}[mode]
+
+ if not fileobj:
+ if self.mode == "a" and not os.path.exists(name):
+ # Create nonexistent files in append mode.
+ self.mode = "w"
+ self._mode = "wb"
+ fileobj = bltn_open(name, self._mode)
+ self._extfileobj = False
+ else:
+ if name is None and hasattr(fileobj, "name"):
+ name = fileobj.name
+ if hasattr(fileobj, "mode"):
+ self._mode = fileobj.mode
+ self._extfileobj = True
+ self.name = os.path.abspath(name) if name else None
+ self.fileobj = fileobj
+
+ # Init attributes.
+ if format is not None:
+ self.format = format
+ if tarinfo is not None:
+ self.tarinfo = tarinfo
+ if dereference is not None:
+ self.dereference = dereference
+ if ignore_zeros is not None:
+ self.ignore_zeros = ignore_zeros
+ if encoding is not None:
+ self.encoding = encoding
+
+ if errors is not None:
+ self.errors = errors
+ elif mode == "r":
+ self.errors = "utf-8"
+ else:
+ self.errors = "strict"
+
+ if pax_headers is not None and self.format == PAX_FORMAT:
+ self.pax_headers = pax_headers
+ else:
+ self.pax_headers = {}
+
+ if debug is not None:
+ self.debug = debug
+ if errorlevel is not None:
+ self.errorlevel = errorlevel
+
+ # Init datastructures.
+ self.closed = False
+ self.members = [] # list of members as TarInfo objects
+ self._loaded = False # flag if all members have been read
+ self.offset = self.fileobj.tell()
+ # current position in the archive file
+ self.inodes = {} # dictionary caching the inodes of
+ # archive members already added
+
+ if self.mode == "r":
+ self.firstmember = None
+ self.firstmember = self.next()
+
+ if self.mode == "a":
+ # Move to the end of the archive,
+ # before the first empty block.
+ self.firstmember = None
+ while True:
+ if self.next() is None:
+ if self.offset > 0:
+ self.fileobj.seek(- BLOCKSIZE, 1)
+ break
+
+ if self.mode in "aw":
+ self._loaded = True
+
+ if self.pax_headers:
+ buf = self.tarinfo.create_pax_global_header(self.pax_headers.copy())
+ self.fileobj.write(buf)
+ self.offset += len(buf)
+
+ def _getposix(self):
+ return self.format == USTAR_FORMAT
+ def _setposix(self, value):
+ import warnings
+ warnings.warn("use the format attribute instead", DeprecationWarning)
+ if value:
+ self.format = USTAR_FORMAT
+ else:
+ self.format = GNU_FORMAT
+ posix = property(_getposix, _setposix)
+
+ #--------------------------------------------------------------------------
+ # Below are the classmethods which act as alternate constructors to the
+ # TarFile class. The open() method is the only one that is needed for
+ # public use; it is the "super"-constructor and is able to select an
+ # adequate "sub"-constructor for a particular compression using the mapping
+ # from OPEN_METH.
+ #
+ # This concept allows one to subclass TarFile without losing the comfort of
+ # the super-constructor. A sub-constructor is registered and made available
+ # by adding it to the mapping in OPEN_METH.
+
+ @classmethod
+ def open(cls, name=None, mode="r", fileobj=None, bufsize=RECORDSIZE, **kwargs):
+ """Open a tar archive for reading, writing or appending. Return
+ an appropriate TarFile class.
+
+ mode:
+ 'r' or 'r:*' open for reading with transparent compression
+ 'r:' open for reading exclusively uncompressed
+ 'r:gz' open for reading with gzip compression
+ 'r:bz2' open for reading with bzip2 compression
+ 'a' or 'a:' open for appending, creating the file if necessary
+ 'w' or 'w:' open for writing without compression
+ 'w:gz' open for writing with gzip compression
+ 'w:bz2' open for writing with bzip2 compression
+
+ 'r|*' open a stream of tar blocks with transparent compression
+ 'r|' open an uncompressed stream of tar blocks for reading
+ 'r|gz' open a gzip compressed stream of tar blocks
+ 'r|bz2' open a bzip2 compressed stream of tar blocks
+ 'w|' open an uncompressed stream for writing
+ 'w|gz' open a gzip compressed stream for writing
+ 'w|bz2' open a bzip2 compressed stream for writing
+ """
+
+ if not name and not fileobj:
+ raise ValueError("nothing to open")
+
+ if mode in ("r", "r:*"):
+ # Find out which *open() is appropriate for opening the file.
+ for comptype in cls.OPEN_METH:
+ func = getattr(cls, cls.OPEN_METH[comptype])
+ if fileobj is not None:
+ saved_pos = fileobj.tell()
+ try:
+ return func(name, "r", fileobj, **kwargs)
+ except (ReadError, CompressionError), e:
+ if fileobj is not None:
+ fileobj.seek(saved_pos)
+ continue
+ raise ReadError("file could not be opened successfully")
+
+ elif ":" in mode:
+ filemode, comptype = mode.split(":", 1)
+ filemode = filemode or "r"
+ comptype = comptype or "tar"
+
+ # Select the *open() function according to
+ # given compression.
+ if comptype in cls.OPEN_METH:
+ func = getattr(cls, cls.OPEN_METH[comptype])
+ else:
+ raise CompressionError("unknown compression type %r" % comptype)
+ return func(name, filemode, fileobj, **kwargs)
+
+ elif "|" in mode:
+ filemode, comptype = mode.split("|", 1)
+ filemode = filemode or "r"
+ comptype = comptype or "tar"
+
+ if filemode not in "rw":
+ raise ValueError("mode must be 'r' or 'w'")
+
+ t = cls(name, filemode,
+ _Stream(name, filemode, comptype, fileobj, bufsize),
+ **kwargs)
+ t._extfileobj = False
+ return t
+
+ elif mode in "aw":
+ return cls.taropen(name, mode, fileobj, **kwargs)
+
+ raise ValueError("undiscernible mode")
+
+ @classmethod
+ def taropen(cls, name, mode="r", fileobj=None, **kwargs):
+ """Open uncompressed tar archive name for reading or writing.
+ """
+ if len(mode) > 1 or mode not in "raw":
+ raise ValueError("mode must be 'r', 'a' or 'w'")
+ return cls(name, mode, fileobj, **kwargs)
+
+ @classmethod
+ def gzopen(cls, name, mode="r", fileobj=None, compresslevel=9, **kwargs):
+ """Open gzip compressed tar archive name for reading or writing.
+ Appending is not allowed.
+ """
+ if len(mode) > 1 or mode not in "rw":
+ raise ValueError("mode must be 'r' or 'w'")
+
+ try:
+ import gzip
+ gzip.GzipFile
+ except (ImportError, AttributeError):
+ raise CompressionError("gzip module is not available")
+
+ if fileobj is None:
+ fileobj = bltn_open(name, mode + "b")
+
+ try:
+ t = cls.taropen(name, mode,
+ gzip.GzipFile(name, mode, compresslevel, fileobj),
+ **kwargs)
+ except IOError:
+ raise ReadError("not a gzip file")
+ t._extfileobj = False
+ return t
+
+ @classmethod
+ def bz2open(cls, name, mode="r", fileobj=None, compresslevel=9, **kwargs):
+ """Open bzip2 compressed tar archive name for reading or writing.
+ Appending is not allowed.
+ """
+ if len(mode) > 1 or mode not in "rw":
+ raise ValueError("mode must be 'r' or 'w'.")
+
+ try:
+ import bz2
+ except ImportError:
+ raise CompressionError("bz2 module is not available")
+
+ if fileobj is not None:
+ fileobj = _BZ2Proxy(fileobj, mode)
+ else:
+ fileobj = bz2.BZ2File(name, mode, compresslevel=compresslevel)
+
+ try:
+ t = cls.taropen(name, mode, fileobj, **kwargs)
+ except IOError:
+ raise ReadError("not a bzip2 file")
+ t._extfileobj = False
+ return t
+
+ # All *open() methods are registered here.
+ OPEN_METH = {
+ "tar": "taropen", # uncompressed tar
+ "gz": "gzopen", # gzip compressed tar
+ "bz2": "bz2open" # bzip2 compressed tar
+ }
+
+ #--------------------------------------------------------------------------
+ # The public methods which TarFile provides:
+
+ def close(self):
+ """Close the TarFile. In write-mode, two finishing zero blocks are
+ appended to the archive.
+ """
+ if self.closed:
+ return
+
+ if self.mode in "aw":
+ self.fileobj.write(NUL * (BLOCKSIZE * 2))
+ self.offset += (BLOCKSIZE * 2)
+ # fill up the end with zero-blocks
+ # (like option -b20 for tar does)
+ blocks, remainder = divmod(self.offset, RECORDSIZE)
+ if remainder > 0:
+ self.fileobj.write(NUL * (RECORDSIZE - remainder))
+
+ if not self._extfileobj:
+ self.fileobj.close()
+ self.closed = True
+
+ def getmember(self, name):
+ """Return a TarInfo object for member `name'. If `name' can not be
+ found in the archive, KeyError is raised. If a member occurs more
+ than once in the archive, its last occurence is assumed to be the
+ most up-to-date version.
+ """
+ tarinfo = self._getmember(name)
+ if tarinfo is None:
+ raise KeyError("filename %r not found" % name)
+ return tarinfo
+
+ def getmembers(self):
+ """Return the members of the archive as a list of TarInfo objects. The
+ list has the same order as the members in the archive.
+ """
+ self._check()
+ if not self._loaded: # if we want to obtain a list of
+ self._load() # all members, we first have to
+ # scan the whole archive.
+ return self.members
+
+ def getnames(self):
+ """Return the members of the archive as a list of their names. It has
+ the same order as the list returned by getmembers().
+ """
+ return [tarinfo.name for tarinfo in self.getmembers()]
+
+ def gettarinfo(self, name=None, arcname=None, fileobj=None):
+ """Create a TarInfo object for either the file `name' or the file
+ object `fileobj' (using os.fstat on its file descriptor). You can
+ modify some of the TarInfo's attributes before you add it using
+ addfile(). If given, `arcname' specifies an alternative name for the
+ file in the archive.
+ """
+ self._check("aw")
+
+ # When fileobj is given, replace name by
+ # fileobj's real name.
+ if fileobj is not None:
+ name = fileobj.name
+
+ # Building the name of the member in the archive.
+ # Backward slashes are converted to forward slashes,
+ # Absolute paths are turned to relative paths.
+ if arcname is None:
+ arcname = name
+ arcname = normpath(arcname)
+ drv, arcname = os.path.splitdrive(arcname)
+ while arcname[0:1] == "/":
+ arcname = arcname[1:]
+
+ # Now, fill the TarInfo object with
+ # information specific for the file.
+ tarinfo = self.tarinfo()
+ tarinfo.tarfile = self
+
+ # Use os.stat or os.lstat, depending on platform
+ # and if symlinks shall be resolved.
+ if fileobj is None:
+ if hasattr(os, "lstat") and not self.dereference:
+ statres = os.lstat(name)
+ else:
+ statres = os.stat(name)
+ else:
+ statres = os.fstat(fileobj.fileno())
+ linkname = ""
+
+ stmd = statres.st_mode
+ if stat.S_ISREG(stmd):
+ inode = (statres.st_ino, statres.st_dev)
+ if not self.dereference and statres.st_nlink > 1 and \
+ inode in self.inodes and arcname != self.inodes[inode]:
+ # Is it a hardlink to an already
+ # archived file?
+ type = LNKTYPE
+ linkname = self.inodes[inode]
+ else:
+ # The inode is added only if its valid.
+ # For win32 it is always 0.
+ type = REGTYPE
+ if inode[0]:
+ self.inodes[inode] = arcname
+ elif stat.S_ISDIR(stmd):
+ type = DIRTYPE
+ elif stat.S_ISFIFO(stmd):
+ type = FIFOTYPE
+ elif stat.S_ISLNK(stmd):
+ type = SYMTYPE
+ linkname = os.readlink(name)
+ elif stat.S_ISCHR(stmd):
+ type = CHRTYPE
+ elif stat.S_ISBLK(stmd):
+ type = BLKTYPE
+ else:
+ return None
+
+ # Fill the TarInfo object with all
+ # information we can get.
+ tarinfo.name = arcname
+ tarinfo.mode = stmd
+ tarinfo.uid = statres.st_uid
+ tarinfo.gid = statres.st_gid
+ if stat.S_ISREG(stmd):
+ tarinfo.size = statres.st_size
+ else:
+ tarinfo.size = 0L
+ tarinfo.mtime = statres.st_mtime
+ tarinfo.type = type
+ tarinfo.linkname = linkname
+ if pwd:
+ try:
+ tarinfo.uname = pwd.getpwuid(tarinfo.uid)[0]
+ except KeyError:
+ pass
+ if grp:
+ try:
+ tarinfo.gname = grp.getgrgid(tarinfo.gid)[0]
+ except KeyError:
+ pass
+
+ if type in (CHRTYPE, BLKTYPE):
+ if hasattr(os, "major") and hasattr(os, "minor"):
+ tarinfo.devmajor = os.major(statres.st_rdev)
+ tarinfo.devminor = os.minor(statres.st_rdev)
+ return tarinfo
+
+ def list(self, verbose=True):
+ """Print a table of contents to sys.stdout. If `verbose' is False, only
+ the names of the members are printed. If it is True, an `ls -l'-like
+ output is produced.
+ """
+ self._check()
+
+ for tarinfo in self:
+ if verbose:
+ print filemode(tarinfo.mode),
+ print "%s/%s" % (tarinfo.uname or tarinfo.uid,
+ tarinfo.gname or tarinfo.gid),
+ if tarinfo.ischr() or tarinfo.isblk():
+ print "%10s" % ("%d,%d" \
+ % (tarinfo.devmajor, tarinfo.devminor)),
+ else:
+ print "%10d" % tarinfo.size,
+ print "%d-%02d-%02d %02d:%02d:%02d" \
+ % time.localtime(tarinfo.mtime)[:6],
+
+ print tarinfo.name + ("/" if tarinfo.isdir() else ""),
+
+ if verbose:
+ if tarinfo.issym():
+ print "->", tarinfo.linkname,
+ if tarinfo.islnk():
+ print "link to", tarinfo.linkname,
+ print
+
+ def add(self, name, arcname=None, recursive=True, exclude=None):
+ """Add the file `name' to the archive. `name' may be any type of file
+ (directory, fifo, symbolic link, etc.). If given, `arcname'
+ specifies an alternative name for the file in the archive.
+ Directories are added recursively by default. This can be avoided by
+ setting `recursive' to False. `exclude' is a function that should
+ return True for each filename to be excluded.
+ """
+ self._check("aw")
+
+ if arcname is None:
+ arcname = name
+
+ # Exclude pathnames.
+ if exclude is not None and exclude(name):
+ self._dbg(2, "tarfile: Excluded %r" % name)
+ return
+
+ # Skip if somebody tries to archive the archive...
+ if self.name is not None and os.path.abspath(name) == self.name:
+ self._dbg(2, "tarfile: Skipped %r" % name)
+ return
+
+ # Special case: The user wants to add the current
+ # working directory.
+ if name == ".":
+ if recursive:
+ if arcname == ".":
+ arcname = ""
+ for f in os.listdir(name):
+ self.add(f, os.path.join(arcname, f), recursive, exclude)
+ return
+
+ self._dbg(1, name)
+
+ # Create a TarInfo object from the file.
+ tarinfo = self.gettarinfo(name, arcname)
+
+ if tarinfo is None:
+ self._dbg(1, "tarfile: Unsupported type %r" % name)
+ return
+
+ # Append the tar header and data to the archive.
+ if tarinfo.isreg():
+ f = bltn_open(name, "rb")
+ self.addfile(tarinfo, f)
+ f.close()
+
+ elif tarinfo.isdir():
+ self.addfile(tarinfo)
+ if recursive:
+ for f in os.listdir(name):
+ self.add(os.path.join(name, f), os.path.join(arcname, f), recursive, exclude)
+
+ else:
+ self.addfile(tarinfo)
+
+ def addfile(self, tarinfo, fileobj=None):
+ """Add the TarInfo object `tarinfo' to the archive. If `fileobj' is
+ given, tarinfo.size bytes are read from it and added to the archive.
+ You can create TarInfo objects using gettarinfo().
+ On Windows platforms, `fileobj' should always be opened with mode
+ 'rb' to avoid irritation about the file size.
+ """
+ self._check("aw")
+
+ tarinfo = copy.copy(tarinfo)
+
+ buf = tarinfo.tobuf(self.format, self.encoding, self.errors)
+ self.fileobj.write(buf)
+ self.offset += len(buf)
+
+ # If there's data to follow, append it.
+ if fileobj is not None:
+ copyfileobj(fileobj, self.fileobj, tarinfo.size)
+ blocks, remainder = divmod(tarinfo.size, BLOCKSIZE)
+ if remainder > 0:
+ self.fileobj.write(NUL * (BLOCKSIZE - remainder))
+ blocks += 1
+ self.offset += blocks * BLOCKSIZE
+
+ self.members.append(tarinfo)
+
+ def extractall(self, path=".", members=None):
+ """Extract all members from the archive to the current working
+ directory and set owner, modification time and permissions on
+ directories afterwards. `path' specifies a different directory
+ to extract to. `members' is optional and must be a subset of the
+ list returned by getmembers().
+ """
+ directories = []
+
+ if members is None:
+ members = self
+
+ for tarinfo in members:
+ if tarinfo.isdir():
+ # Extract directories with a safe mode.
+ directories.append(tarinfo)
+ tarinfo = copy.copy(tarinfo)
+ tarinfo.mode = 0700
+ self.extract(tarinfo, path)
+
+ # Reverse sort directories.
+ directories.sort(key=operator.attrgetter('name'))
+ directories.reverse()
+
+ # Set correct owner, mtime and filemode on directories.
+ for tarinfo in directories:
+ dirpath = os.path.join(path, tarinfo.name)
+ try:
+ self.chown(tarinfo, dirpath)
+ self.utime(tarinfo, dirpath)
+ self.chmod(tarinfo, dirpath)
+ except ExtractError, e:
+ if self.errorlevel > 1:
+ raise
+ else:
+ self._dbg(1, "tarfile: %s" % e)
+
+ def extract(self, member, path=""):
+ """Extract a member from the archive to the current working directory,
+ using its full name. Its file information is extracted as accurately
+ as possible. `member' may be a filename or a TarInfo object. You can
+ specify a different directory using `path'.
+ """
+ self._check("r")
+
+ if isinstance(member, basestring):
+ tarinfo = self.getmember(member)
+ else:
+ tarinfo = member
+
+ # Prepare the link target for makelink().
+ if tarinfo.islnk():
+ tarinfo._link_target = os.path.join(path, tarinfo.linkname)
+
+ try:
+ self._extract_member(tarinfo, os.path.join(path, tarinfo.name))
+ except EnvironmentError, e:
+ if self.errorlevel > 0:
+ raise
+ else:
+ if e.filename is None:
+ self._dbg(1, "tarfile: %s" % e.strerror)
+ else:
+ self._dbg(1, "tarfile: %s %r" % (e.strerror, e.filename))
+ except ExtractError, e:
+ if self.errorlevel > 1:
+ raise
+ else:
+ self._dbg(1, "tarfile: %s" % e)
+
+ def extractfile(self, member):
+ """Extract a member from the archive as a file object. `member' may be
+ a filename or a TarInfo object. If `member' is a regular file, a
+ file-like object is returned. If `member' is a link, a file-like
+ object is constructed from the link's target. If `member' is none of
+ the above, None is returned.
+ The file-like object is read-only and provides the following
+ methods: read(), readline(), readlines(), seek() and tell()
+ """
+ self._check("r")
+
+ if isinstance(member, basestring):
+ tarinfo = self.getmember(member)
+ else:
+ tarinfo = member
+
+ if tarinfo.isreg():
+ return self.fileobject(self, tarinfo)
+
+ elif tarinfo.type not in SUPPORTED_TYPES:
+ # If a member's type is unknown, it is treated as a
+ # regular file.
+ return self.fileobject(self, tarinfo)
+
+ elif tarinfo.islnk() or tarinfo.issym():
+ if isinstance(self.fileobj, _Stream):
+ # A small but ugly workaround for the case that someone tries
+ # to extract a (sym)link as a file-object from a non-seekable
+ # stream of tar blocks.
+ raise StreamError("cannot extract (sym)link as file object")
+ else:
+ # A (sym)link's file object is its target's file object.
+ return self.extractfile(self._getmember(tarinfo.linkname,
+ tarinfo))
+ else:
+ # If there's no data associated with the member (directory, chrdev,
+ # blkdev, etc.), return None instead of a file object.
+ return None
+
+ def _extract_member(self, tarinfo, targetpath):
+ """Extract the TarInfo object tarinfo to a physical
+ file called targetpath.
+ """
+ # Fetch the TarInfo object for the given name
+ # and build the destination pathname, replacing
+ # forward slashes to platform specific separators.
+ if targetpath[-1:] == "/":
+ targetpath = targetpath[:-1]
+ targetpath = os.path.normpath(targetpath)
+
+ # Create all upper directories.
+ upperdirs = os.path.dirname(targetpath)
+ if upperdirs and not os.path.exists(upperdirs):
+ # Create directories that are not part of the archive with
+ # default permissions.
+ os.makedirs(upperdirs)
+
+ if tarinfo.islnk() or tarinfo.issym():
+ self._dbg(1, "%s -> %s" % (tarinfo.name, tarinfo.linkname))
+ else:
+ self._dbg(1, tarinfo.name)
+
+ if tarinfo.isreg():
+ self.makefile(tarinfo, targetpath)
+ elif tarinfo.isdir():
+ self.makedir(tarinfo, targetpath)
+ elif tarinfo.isfifo():
+ self.makefifo(tarinfo, targetpath)
+ elif tarinfo.ischr() or tarinfo.isblk():
+ self.makedev(tarinfo, targetpath)
+ elif tarinfo.islnk() or tarinfo.issym():
+ self.makelink(tarinfo, targetpath)
+ elif tarinfo.type not in SUPPORTED_TYPES:
+ self.makeunknown(tarinfo, targetpath)
+ else:
+ self.makefile(tarinfo, targetpath)
+
+ self.chown(tarinfo, targetpath)
+ if not tarinfo.issym():
+ self.chmod(tarinfo, targetpath)
+ self.utime(tarinfo, targetpath)
+
+ #--------------------------------------------------------------------------
+ # Below are the different file methods. They are called via
+ # _extract_member() when extract() is called. They can be replaced in a
+ # subclass to implement other functionality.
+
+ def makedir(self, tarinfo, targetpath):
+ """Make a directory called targetpath.
+ """
+ try:
+ # Use a safe mode for the directory, the real mode is set
+ # later in _extract_member().
+ os.mkdir(targetpath, 0700)
+ except EnvironmentError, e:
+ if e.errno != errno.EEXIST:
+ raise
+
+ def makefile(self, tarinfo, targetpath):
+ """Make a file called targetpath.
+ """
+ source = self.extractfile(tarinfo)
+ target = bltn_open(targetpath, "wb")
+ copyfileobj(source, target)
+ source.close()
+ target.close()
+
+ def makeunknown(self, tarinfo, targetpath):
+ """Make a file from a TarInfo object with an unknown type
+ at targetpath.
+ """
+ self.makefile(tarinfo, targetpath)
+ self._dbg(1, "tarfile: Unknown file type %r, " \
+ "extracted as regular file." % tarinfo.type)
+
+ def makefifo(self, tarinfo, targetpath):
+ """Make a fifo called targetpath.
+ """
+ if hasattr(os, "mkfifo"):
+ os.mkfifo(targetpath)
+ else:
+ raise ExtractError("fifo not supported by system")
+
+ def makedev(self, tarinfo, targetpath):
+ """Make a character or block device called targetpath.
+ """
+ if not hasattr(os, "mknod") or not hasattr(os, "makedev"):
+ raise ExtractError("special devices not supported by system")
+
+ mode = tarinfo.mode
+ if tarinfo.isblk():
+ mode |= stat.S_IFBLK
+ else:
+ mode |= stat.S_IFCHR
+
+ os.mknod(targetpath, mode,
+ os.makedev(tarinfo.devmajor, tarinfo.devminor))
+
+ def makelink(self, tarinfo, targetpath):
+ """Make a (symbolic) link called targetpath. If it cannot be created
+ (platform limitation), we try to make a copy of the referenced file
+ instead of a link.
+ """
+ linkpath = tarinfo.linkname
+ try:
+ if tarinfo.issym():
+ os.symlink(linkpath, targetpath)
+ else:
+ # See extract().
+ os.link(tarinfo._link_target, targetpath)
+ except AttributeError:
+ if tarinfo.issym():
+ linkpath = os.path.join(os.path.dirname(tarinfo.name),
+ linkpath)
+ linkpath = normpath(linkpath)
+
+ try:
+ self._extract_member(self.getmember(linkpath), targetpath)
+ except (EnvironmentError, KeyError), e:
+ linkpath = os.path.normpath(linkpath)
+ try:
+ shutil.copy2(linkpath, targetpath)
+ except EnvironmentError, e:
+ raise IOError("link could not be created")
+
+ def chown(self, tarinfo, targetpath):
+ """Set owner of targetpath according to tarinfo.
+ """
+ if pwd and hasattr(os, "geteuid") and os.geteuid() == 0:
+ # We have to be root to do so.
+ try:
+ g = grp.getgrnam(tarinfo.gname)[2]
+ except KeyError:
+ try:
+ g = grp.getgrgid(tarinfo.gid)[2]
+ except KeyError:
+ g = os.getgid()
+ try:
+ u = pwd.getpwnam(tarinfo.uname)[2]
+ except KeyError:
+ try:
+ u = pwd.getpwuid(tarinfo.uid)[2]
+ except KeyError:
+ u = os.getuid()
+ try:
+ if tarinfo.issym() and hasattr(os, "lchown"):
+ os.lchown(targetpath, u, g)
+ else:
+ if sys.platform != "os2emx":
+ os.chown(targetpath, u, g)
+ except EnvironmentError, e:
+ raise ExtractError("could not change owner")
+
+ def chmod(self, tarinfo, targetpath):
+ """Set file permissions of targetpath according to tarinfo.
+ """
+ if hasattr(os, 'chmod'):
+ try:
+ os.chmod(targetpath, tarinfo.mode)
+ except EnvironmentError, e:
+ raise ExtractError("could not change mode")
+
+ def utime(self, tarinfo, targetpath):
+ """Set modification time of targetpath according to tarinfo.
+ """
+ if not hasattr(os, 'utime'):
+ return
+ if sys.platform == "win32" and tarinfo.isdir():
+ # According to msdn.microsoft.com, it is an error (EACCES)
+ # to use utime() on directories.
+ return
+ try:
+ os.utime(targetpath, (tarinfo.mtime, tarinfo.mtime))
+ except EnvironmentError, e:
+ raise ExtractError("could not change modification time")
+
+ #--------------------------------------------------------------------------
+ def next(self):
+ """Return the next member of the archive as a TarInfo object, when
+ TarFile is opened for reading. Return None if there is no more
+ available.
+ """
+ self._check("ra")
+ if self.firstmember is not None:
+ m = self.firstmember
+ self.firstmember = None
+ return m
+
+ # Read the next block.
+ self.fileobj.seek(self.offset)
+ while True:
+ try:
+ tarinfo = self.tarinfo.fromtarfile(self)
+ if tarinfo is None:
+ return
+ self.members.append(tarinfo)
+
+ except HeaderError, e:
+ if self.ignore_zeros:
+ self._dbg(2, "0x%X: %s" % (self.offset, e))
+ self.offset += BLOCKSIZE
+ continue
+ else:
+ if self.offset == 0:
+ raise ReadError(str(e))
+ return None
+ break
+
+ return tarinfo
+
+ #--------------------------------------------------------------------------
+ # Little helper methods:
+
+ def _getmember(self, name, tarinfo=None):
+ """Find an archive member by name from bottom to top.
+ If tarinfo is given, it is used as the starting point.
+ """
+ # Ensure that all members have been loaded.
+ members = self.getmembers()
+
+ if tarinfo is None:
+ end = len(members)
+ else:
+ end = members.index(tarinfo)
+
+ for i in xrange(end - 1, -1, -1):
+ if name == members[i].name:
+ return members[i]
+
+ def _load(self):
+ """Read through the entire archive file and look for readable
+ members.
+ """
+ while True:
+ tarinfo = self.next()
+ if tarinfo is None:
+ break
+ self._loaded = True
+
+ def _check(self, mode=None):
+ """Check if TarFile is still open, and if the operation's mode
+ corresponds to TarFile's mode.
+ """
+ if self.closed:
+ raise IOError("%s is closed" % self.__class__.__name__)
+ if mode is not None and self.mode not in mode:
+ raise IOError("bad operation for mode %r" % self.mode)
+
+ def __iter__(self):
+ """Provide an iterator object.
+ """
+ if self._loaded:
+ return iter(self.members)
+ else:
+ return TarIter(self)
+
+ def _dbg(self, level, msg):
+ """Write debugging output to sys.stderr.
+ """
+ if level <= self.debug:
+ print >> sys.stderr, msg
+# class TarFile
+
+class TarIter:
+ """Iterator Class.
+
+ for tarinfo in TarFile(...):
+ suite...
+ """
+
+ def __init__(self, tarfile):
+ """Construct a TarIter object.
+ """
+ self.tarfile = tarfile
+ self.index = 0
+ def __iter__(self):
+ """Return iterator object.
+ """
+ return self
+ def next(self):
+ """Return the next item using TarFile's next() method.
+ When all members have been read, set TarFile as _loaded.
+ """
+ # Fix for SF #1100429: Under rare circumstances it can
+ # happen that getmembers() is called during iteration,
+ # which will cause TarIter to stop prematurely.
+ if not self.tarfile._loaded:
+ tarinfo = self.tarfile.next()
+ if not tarinfo:
+ self.tarfile._loaded = True
+ raise StopIteration
+ else:
+ try:
+ tarinfo = self.tarfile.members[self.index]
+ except IndexError:
+ raise StopIteration
+ self.index += 1
+ return tarinfo
+
+# Helper classes for sparse file support
+class _section:
+ """Base class for _data and _hole.
+ """
+ def __init__(self, offset, size):
+ self.offset = offset
+ self.size = size
+ def __contains__(self, offset):
+ return self.offset <= offset < self.offset + self.size
+
+class _data(_section):
+ """Represent a data section in a sparse file.
+ """
+ def __init__(self, offset, size, realpos):
+ _section.__init__(self, offset, size)
+ self.realpos = realpos
+
+class _hole(_section):
+ """Represent a hole section in a sparse file.
+ """
+ pass
+
+class _ringbuffer(list):
+ """Ringbuffer class which increases performance
+ over a regular list.
+ """
+ def __init__(self):
+ self.idx = 0
+ def find(self, offset):
+ idx = self.idx
+ while True:
+ item = self[idx]
+ if offset in item:
+ break
+ idx += 1
+ if idx == len(self):
+ idx = 0
+ if idx == self.idx:
+ # End of File
+ return None
+ self.idx = idx
+ return item
+
+#---------------------------------------------
+# zipfile compatible TarFile class
+#---------------------------------------------
+TAR_PLAIN = 0 # zipfile.ZIP_STORED
+TAR_GZIPPED = 8 # zipfile.ZIP_DEFLATED
+class TarFileCompat:
+ """TarFile class compatible with standard module zipfile's
+ ZipFile class.
+ """
+ def __init__(self, file, mode="r", compression=TAR_PLAIN):
+ from warnings import warnpy3k
+ warnpy3k("the TarFileCompat class has been removed in Python 3.0",
+ stacklevel=2)
+ if compression == TAR_PLAIN:
+ self.tarfile = TarFile.taropen(file, mode)
+ elif compression == TAR_GZIPPED:
+ self.tarfile = TarFile.gzopen(file, mode)
+ else:
+ raise ValueError("unknown compression constant")
+ if mode[0:1] == "r":
+ members = self.tarfile.getmembers()
+ for m in members:
+ m.filename = m.name
+ m.file_size = m.size
+ m.date_time = time.gmtime(m.mtime)[:6]
+ def namelist(self):
+ return map(lambda m: m.name, self.infolist())
+ def infolist(self):
+ return filter(lambda m: m.type in REGULAR_TYPES,
+ self.tarfile.getmembers())
+ def printdir(self):
+ self.tarfile.list()
+ def testzip(self):
+ return
+ def getinfo(self, name):
+ return self.tarfile.getmember(name)
+ def read(self, name):
+ return self.tarfile.extractfile(self.tarfile.getmember(name)).read()
+ def write(self, filename, arcname=None, compress_type=None):
+ self.tarfile.add(filename, arcname)
+ def writestr(self, zinfo, bytes):
+ try:
+ from cStringIO import StringIO
+ except ImportError:
+ from StringIO import StringIO
+ import calendar
+ tinfo = TarInfo(zinfo.filename)
+ tinfo.size = len(bytes)
+ tinfo.mtime = calendar.timegm(zinfo.date_time)
+ self.tarfile.addfile(tinfo, StringIO(bytes))
+ def close(self):
+ self.tarfile.close()
+#class TarFileCompat
+
+#--------------------
+# exported functions
+#--------------------
+def is_tarfile(name):
+ """Return True if name points to a tar archive that we
+ are able to handle, else return False.
+ """
+ try:
+ t = open(name)
+ t.close()
+ return True
+ except TarError:
+ return False
+
+bltn_open = open
+open = TarFile.open