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cpython/Lib/test/test_tarfile.py
Lars Gustäbel 42e0091208 Merged revisions 70523 via svnmerge from 
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r70523 | lars.gustaebel | 2009-03-22 21:09:33 +0100 (Sun, 22 Mar 2009) | 5 lines

  Issue #5068: Fixed the tarfile._BZ2Proxy.read() method that would loop
  forever on incomplete input. That caused tarfile.open() to hang when used
  with mode 'r' or 'r:bz2' and a fileobj argument that contained no data or
  partial bzip2 compressed data.
........
2009-03-22 20:34:29 +00:00

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import sys
import os
import io
import shutil
import tempfile
import io
from hashlib import md5
import errno
import unittest
import tarfile
from test import support
# Check for our compression modules.
try:
import gzip
gzip.GzipFile
except (ImportError, AttributeError):
gzip = None
try:
import bz2
except ImportError:
bz2 = None
def md5sum(data):
return md5(data).hexdigest()
def path(path):
return support.findfile(path)
TEMPDIR = os.path.join(tempfile.gettempdir(), "test_tarfile_tmp")
tarname = path("testtar.tar")
gzipname = os.path.join(TEMPDIR, "testtar.tar.gz")
bz2name = os.path.join(TEMPDIR, "testtar.tar.bz2")
tmpname = os.path.join(TEMPDIR, "tmp.tar")
md5_regtype = "65f477c818ad9e15f7feab0c6d37742f"
md5_sparse = "a54fbc4ca4f4399a90e1b27164012fc6"
class ReadTest(unittest.TestCase):
tarname = tarname
mode = "r:"
def setUp(self):
self.tar = tarfile.open(self.tarname, mode=self.mode, encoding="iso8859-1")
def tearDown(self):
self.tar.close()
class UstarReadTest(ReadTest):
def test_fileobj_regular_file(self):
tarinfo = self.tar.getmember("ustar/regtype")
fobj = self.tar.extractfile(tarinfo)
data = fobj.read()
self.assert_((len(data), md5sum(data)) == (tarinfo.size, md5_regtype),
"regular file extraction failed")
def test_fileobj_readlines(self):
self.tar.extract("ustar/regtype", TEMPDIR)
tarinfo = self.tar.getmember("ustar/regtype")
fobj1 = open(os.path.join(TEMPDIR, "ustar/regtype"), "r")
fobj2 = io.TextIOWrapper(self.tar.extractfile(tarinfo))
lines1 = fobj1.readlines()
lines2 = fobj2.readlines()
self.assert_(lines1 == lines2,
"fileobj.readlines() failed")
self.assert_(len(lines2) == 114,
"fileobj.readlines() failed")
self.assert_(lines2[83] == \
"I will gladly admit that Python is not the fastest running scripting language.\n",
"fileobj.readlines() failed")
def test_fileobj_iter(self):
self.tar.extract("ustar/regtype", TEMPDIR)
tarinfo = self.tar.getmember("ustar/regtype")
fobj1 = open(os.path.join(TEMPDIR, "ustar/regtype"), "rU")
fobj2 = self.tar.extractfile(tarinfo)
lines1 = fobj1.readlines()
lines2 = list(io.TextIOWrapper(fobj2))
self.assert_(lines1 == lines2,
"fileobj.__iter__() failed")
def test_fileobj_seek(self):
self.tar.extract("ustar/regtype", TEMPDIR)
fobj = open(os.path.join(TEMPDIR, "ustar/regtype"), "rb")
data = fobj.read()
fobj.close()
tarinfo = self.tar.getmember("ustar/regtype")
fobj = self.tar.extractfile(tarinfo)
text = fobj.read()
fobj.seek(0)
self.assertEqual(0, fobj.tell(),
"seek() to file's start failed")
fobj.seek(2048, 0)
self.assertEqual(2048, fobj.tell(),
"seek() to absolute position failed")
fobj.seek(-1024, 1)
self.assertEqual(1024, fobj.tell(),
"seek() to negative relative position failed")
fobj.seek(1024, 1)
self.assertEqual(2048, fobj.tell(),
"seek() to positive relative position failed")
s = fobj.read(10)
self.assert_(s == data[2048:2058],
"read() after seek failed")
fobj.seek(0, 2)
self.assertEqual(tarinfo.size, fobj.tell(),
"seek() to file's end failed")
self.assert_(fobj.read() == b"",
"read() at file's end did not return empty string")
fobj.seek(-tarinfo.size, 2)
self.assertEqual(0, fobj.tell(),
"relative seek() to file's end failed")
fobj.seek(512)
s1 = fobj.readlines()
fobj.seek(512)
s2 = fobj.readlines()
self.assert_(s1 == s2,
"readlines() after seek failed")
fobj.seek(0)
self.assertEqual(len(fobj.readline()), fobj.tell(),
"tell() after readline() failed")
fobj.seek(512)
self.assert_(len(fobj.readline()) + 512 == fobj.tell(),
"tell() after seek() and readline() failed")
fobj.seek(0)
line = fobj.readline()
self.assertEqual(fobj.read(), data[len(line):],
"read() after readline() failed")
fobj.close()
class MiscReadTest(ReadTest):
def test_no_name_argument(self):
fobj = open(self.tarname, "rb")
tar = tarfile.open(fileobj=fobj, mode=self.mode)
self.assertEqual(tar.name, os.path.abspath(fobj.name))
def test_no_name_attribute(self):
data = open(self.tarname, "rb").read()
fobj = io.BytesIO(data)
self.assertRaises(AttributeError, getattr, fobj, "name")
tar = tarfile.open(fileobj=fobj, mode=self.mode)
self.assertEqual(tar.name, None)
def test_empty_name_attribute(self):
data = open(self.tarname, "rb").read()
fobj = io.BytesIO(data)
fobj.name = ""
tar = tarfile.open(fileobj=fobj, mode=self.mode)
self.assertEqual(tar.name, None)
def test_fileobj_with_offset(self):
# Skip the first member and store values from the second member
# of the testtar.
tar = tarfile.open(self.tarname, mode=self.mode)
tar.next()
t = tar.next()
name = t.name
offset = t.offset
data = tar.extractfile(t).read()
tar.close()
# Open the testtar and seek to the offset of the second member.
if self.mode.endswith(":gz"):
_open = gzip.GzipFile
elif self.mode.endswith(":bz2"):
_open = bz2.BZ2File
else:
_open = open
fobj = _open(self.tarname, "rb")
fobj.seek(offset)
# Test if the tarfile starts with the second member.
tar = tar.open(self.tarname, mode="r:", fileobj=fobj)
t = tar.next()
self.assertEqual(t.name, name)
# Read to the end of fileobj and test if seeking back to the
# beginning works.
tar.getmembers()
self.assertEqual(tar.extractfile(t).read(), data,
"seek back did not work")
tar.close()
def test_fail_comp(self):
# For Gzip and Bz2 Tests: fail with a ReadError on an uncompressed file.
if self.mode == "r:":
return
self.assertRaises(tarfile.ReadError, tarfile.open, tarname, self.mode)
fobj = open(tarname, "rb")
self.assertRaises(tarfile.ReadError, tarfile.open, fileobj=fobj, mode=self.mode)
def test_v7_dirtype(self):
# Test old style dirtype member (bug #1336623):
# Old V7 tars create directory members using an AREGTYPE
# header with a "/" appended to the filename field.
tarinfo = self.tar.getmember("misc/dirtype-old-v7")
self.assert_(tarinfo.type == tarfile.DIRTYPE,
"v7 dirtype failed")
def test_xstar_type(self):
# The xstar format stores extra atime and ctime fields inside the
# space reserved for the prefix field. The prefix field must be
# ignored in this case, otherwise it will mess up the name.
try:
self.tar.getmember("misc/regtype-xstar")
except KeyError:
self.fail("failed to find misc/regtype-xstar (mangled prefix?)")
def test_check_members(self):
for tarinfo in self.tar:
self.assert_(int(tarinfo.mtime) == 0o7606136617,
"wrong mtime for %s" % tarinfo.name)
if not tarinfo.name.startswith("ustar/"):
continue
self.assert_(tarinfo.uname == "tarfile",
"wrong uname for %s" % tarinfo.name)
def test_find_members(self):
self.assert_(self.tar.getmembers()[-1].name == "misc/eof",
"could not find all members")
def test_extract_hardlink(self):
# Test hardlink extraction (e.g. bug #857297).
tar = tarfile.open(tarname, errorlevel=1, encoding="iso8859-1")
tar.extract("ustar/regtype", TEMPDIR)
try:
tar.extract("ustar/lnktype", TEMPDIR)
except EnvironmentError as e:
if e.errno == errno.ENOENT:
self.fail("hardlink not extracted properly")
data = open(os.path.join(TEMPDIR, "ustar/lnktype"), "rb").read()
self.assertEqual(md5sum(data), md5_regtype)
try:
tar.extract("ustar/symtype", TEMPDIR)
except EnvironmentError as e:
if e.errno == errno.ENOENT:
self.fail("symlink not extracted properly")
data = open(os.path.join(TEMPDIR, "ustar/symtype"), "rb").read()
self.assertEqual(md5sum(data), md5_regtype)
def test_extractall(self):
# Test if extractall() correctly restores directory permissions
# and times (see issue1735).
tar = tarfile.open(tarname, encoding="iso8859-1")
directories = [t for t in tar if t.isdir()]
tar.extractall(TEMPDIR, directories)
for tarinfo in directories:
path = os.path.join(TEMPDIR, tarinfo.name)
if sys.platform != "win32":
# Win32 has no support for fine grained permissions.
self.assertEqual(tarinfo.mode & 0o777, os.stat(path).st_mode & 0o777)
self.assertEqual(tarinfo.mtime, os.path.getmtime(path))
tar.close()
class StreamReadTest(ReadTest):
mode="r|"
def test_fileobj_regular_file(self):
tarinfo = self.tar.next() # get "regtype" (can't use getmember)
fobj = self.tar.extractfile(tarinfo)
data = fobj.read()
self.assert_((len(data), md5sum(data)) == (tarinfo.size, md5_regtype),
"regular file extraction failed")
def test_provoke_stream_error(self):
tarinfos = self.tar.getmembers()
f = self.tar.extractfile(tarinfos[0]) # read the first member
self.assertRaises(tarfile.StreamError, f.read)
def test_compare_members(self):
tar1 = tarfile.open(tarname, encoding="iso8859-1")
tar2 = self.tar
while True:
t1 = tar1.next()
t2 = tar2.next()
if t1 is None:
break
self.assert_(t2 is not None, "stream.next() failed.")
if t2.islnk() or t2.issym():
self.assertRaises(tarfile.StreamError, tar2.extractfile, t2)
continue
v1 = tar1.extractfile(t1)
v2 = tar2.extractfile(t2)
if v1 is None:
continue
self.assert_(v2 is not None, "stream.extractfile() failed")
self.assertEqual(v1.read(), v2.read(), "stream extraction failed")
tar1.close()
class DetectReadTest(unittest.TestCase):
def _testfunc_file(self, name, mode):
try:
tarfile.open(name, mode)
except tarfile.ReadError as e:
self.fail()
def _testfunc_fileobj(self, name, mode):
try:
tarfile.open(name, mode, fileobj=open(name, "rb"))
except tarfile.ReadError as e:
self.fail()
def _test_modes(self, testfunc):
testfunc(tarname, "r")
testfunc(tarname, "r:")
testfunc(tarname, "r:*")
testfunc(tarname, "r|")
testfunc(tarname, "r|*")
if gzip:
self.assertRaises(tarfile.ReadError, tarfile.open, tarname, mode="r:gz")
self.assertRaises(tarfile.ReadError, tarfile.open, tarname, mode="r|gz")
self.assertRaises(tarfile.ReadError, tarfile.open, gzipname, mode="r:")
self.assertRaises(tarfile.ReadError, tarfile.open, gzipname, mode="r|")
testfunc(gzipname, "r")
testfunc(gzipname, "r:*")
testfunc(gzipname, "r:gz")
testfunc(gzipname, "r|*")
testfunc(gzipname, "r|gz")
if bz2:
self.assertRaises(tarfile.ReadError, tarfile.open, tarname, mode="r:bz2")
self.assertRaises(tarfile.ReadError, tarfile.open, tarname, mode="r|bz2")
self.assertRaises(tarfile.ReadError, tarfile.open, bz2name, mode="r:")
self.assertRaises(tarfile.ReadError, tarfile.open, bz2name, mode="r|")
testfunc(bz2name, "r")
testfunc(bz2name, "r:*")
testfunc(bz2name, "r:bz2")
testfunc(bz2name, "r|*")
testfunc(bz2name, "r|bz2")
def test_detect_file(self):
self._test_modes(self._testfunc_file)
def test_detect_fileobj(self):
self._test_modes(self._testfunc_fileobj)
class MemberReadTest(ReadTest):
def _test_member(self, tarinfo, chksum=None, **kwargs):
if chksum is not None:
self.assert_(md5sum(self.tar.extractfile(tarinfo).read()) == chksum,
"wrong md5sum for %s" % tarinfo.name)
kwargs["mtime"] = 0o7606136617
kwargs["uid"] = 1000
kwargs["gid"] = 100
if "old-v7" not in tarinfo.name:
# V7 tar can't handle alphabetic owners.
kwargs["uname"] = "tarfile"
kwargs["gname"] = "tarfile"
for k, v in kwargs.items():
self.assert_(getattr(tarinfo, k) == v,
"wrong value in %s field of %s" % (k, tarinfo.name))
def test_find_regtype(self):
tarinfo = self.tar.getmember("ustar/regtype")
self._test_member(tarinfo, size=7011, chksum=md5_regtype)
def test_find_conttype(self):
tarinfo = self.tar.getmember("ustar/conttype")
self._test_member(tarinfo, size=7011, chksum=md5_regtype)
def test_find_dirtype(self):
tarinfo = self.tar.getmember("ustar/dirtype")
self._test_member(tarinfo, size=0)
def test_find_dirtype_with_size(self):
tarinfo = self.tar.getmember("ustar/dirtype-with-size")
self._test_member(tarinfo, size=255)
def test_find_lnktype(self):
tarinfo = self.tar.getmember("ustar/lnktype")
self._test_member(tarinfo, size=0, linkname="ustar/regtype")
def test_find_symtype(self):
tarinfo = self.tar.getmember("ustar/symtype")
self._test_member(tarinfo, size=0, linkname="regtype")
def test_find_blktype(self):
tarinfo = self.tar.getmember("ustar/blktype")
self._test_member(tarinfo, size=0, devmajor=3, devminor=0)
def test_find_chrtype(self):
tarinfo = self.tar.getmember("ustar/chrtype")
self._test_member(tarinfo, size=0, devmajor=1, devminor=3)
def test_find_fifotype(self):
tarinfo = self.tar.getmember("ustar/fifotype")
self._test_member(tarinfo, size=0)
def test_find_sparse(self):
tarinfo = self.tar.getmember("ustar/sparse")
self._test_member(tarinfo, size=86016, chksum=md5_sparse)
def test_find_umlauts(self):
tarinfo = self.tar.getmember("ustar/umlauts-\xc4\xd6\xdc\xe4\xf6\xfc\xdf")
self._test_member(tarinfo, size=7011, chksum=md5_regtype)
def test_find_ustar_longname(self):
name = "ustar/" + "12345/" * 39 + "1234567/longname"
self.assert_(name in self.tar.getnames())
def test_find_regtype_oldv7(self):
tarinfo = self.tar.getmember("misc/regtype-old-v7")
self._test_member(tarinfo, size=7011, chksum=md5_regtype)
def test_find_pax_umlauts(self):
self.tar = tarfile.open(self.tarname, mode=self.mode, encoding="iso8859-1")
tarinfo = self.tar.getmember("pax/umlauts-\xc4\xd6\xdc\xe4\xf6\xfc\xdf")
self._test_member(tarinfo, size=7011, chksum=md5_regtype)
class LongnameTest(ReadTest):
def test_read_longname(self):
# Test reading of longname (bug #1471427).
longname = self.subdir + "/" + "123/" * 125 + "longname"
try:
tarinfo = self.tar.getmember(longname)
except KeyError:
self.fail("longname not found")
self.assert_(tarinfo.type != tarfile.DIRTYPE, "read longname as dirtype")
def test_read_longlink(self):
longname = self.subdir + "/" + "123/" * 125 + "longname"
longlink = self.subdir + "/" + "123/" * 125 + "longlink"
try:
tarinfo = self.tar.getmember(longlink)
except KeyError:
self.fail("longlink not found")
self.assert_(tarinfo.linkname == longname, "linkname wrong")
def test_truncated_longname(self):
longname = self.subdir + "/" + "123/" * 125 + "longname"
tarinfo = self.tar.getmember(longname)
offset = tarinfo.offset
self.tar.fileobj.seek(offset)
fobj = io.BytesIO(self.tar.fileobj.read(3 * 512))
self.assertRaises(tarfile.ReadError, tarfile.open, name="foo.tar", fileobj=fobj)
def test_header_offset(self):
# Test if the start offset of the TarInfo object includes
# the preceding extended header.
longname = self.subdir + "/" + "123/" * 125 + "longname"
offset = self.tar.getmember(longname).offset
fobj = open(tarname, "rb")
fobj.seek(offset)
tarinfo = tarfile.TarInfo.frombuf(fobj.read(512), "iso8859-1", "strict")
self.assertEqual(tarinfo.type, self.longnametype)
class GNUReadTest(LongnameTest):
subdir = "gnu"
longnametype = tarfile.GNUTYPE_LONGNAME
def test_sparse_file(self):
tarinfo1 = self.tar.getmember("ustar/sparse")
fobj1 = self.tar.extractfile(tarinfo1)
tarinfo2 = self.tar.getmember("gnu/sparse")
fobj2 = self.tar.extractfile(tarinfo2)
self.assertEqual(fobj1.read(), fobj2.read(),
"sparse file extraction failed")
class PaxReadTest(LongnameTest):
subdir = "pax"
longnametype = tarfile.XHDTYPE
def test_pax_global_headers(self):
tar = tarfile.open(tarname, encoding="iso8859-1")
tarinfo = tar.getmember("pax/regtype1")
self.assertEqual(tarinfo.uname, "foo")
self.assertEqual(tarinfo.gname, "bar")
self.assertEqual(tarinfo.pax_headers.get("VENDOR.umlauts"), "\xc4\xd6\xdc\xe4\xf6\xfc\xdf")
tarinfo = tar.getmember("pax/regtype2")
self.assertEqual(tarinfo.uname, "")
self.assertEqual(tarinfo.gname, "bar")
self.assertEqual(tarinfo.pax_headers.get("VENDOR.umlauts"), "\xc4\xd6\xdc\xe4\xf6\xfc\xdf")
tarinfo = tar.getmember("pax/regtype3")
self.assertEqual(tarinfo.uname, "tarfile")
self.assertEqual(tarinfo.gname, "tarfile")
self.assertEqual(tarinfo.pax_headers.get("VENDOR.umlauts"), "\xc4\xd6\xdc\xe4\xf6\xfc\xdf")
def test_pax_number_fields(self):
# All following number fields are read from the pax header.
tar = tarfile.open(tarname, encoding="iso8859-1")
tarinfo = tar.getmember("pax/regtype4")
self.assertEqual(tarinfo.size, 7011)
self.assertEqual(tarinfo.uid, 123)
self.assertEqual(tarinfo.gid, 123)
self.assertEqual(tarinfo.mtime, 1041808783.0)
self.assertEqual(type(tarinfo.mtime), float)
self.assertEqual(float(tarinfo.pax_headers["atime"]), 1041808783.0)
self.assertEqual(float(tarinfo.pax_headers["ctime"]), 1041808783.0)
class WriteTestBase(unittest.TestCase):
# Put all write tests in here that are supposed to be tested
# in all possible mode combinations.
def test_fileobj_no_close(self):
fobj = io.BytesIO()
tar = tarfile.open(fileobj=fobj, mode=self.mode)
tar.addfile(tarfile.TarInfo("foo"))
tar.close()
self.assert_(fobj.closed is False, "external fileobjs must never closed")
class WriteTest(WriteTestBase):
mode = "w:"
def test_100_char_name(self):
# The name field in a tar header stores strings of at most 100 chars.
# If a string is shorter than 100 chars it has to be padded with '\0',
# which implies that a string of exactly 100 chars is stored without
# a trailing '\0'.
name = "0123456789" * 10
tar = tarfile.open(tmpname, self.mode)
t = tarfile.TarInfo(name)
tar.addfile(t)
tar.close()
tar = tarfile.open(tmpname)
self.assert_(tar.getnames()[0] == name,
"failed to store 100 char filename")
tar.close()
def test_tar_size(self):
# Test for bug #1013882.
tar = tarfile.open(tmpname, self.mode)
path = os.path.join(TEMPDIR, "file")
fobj = open(path, "wb")
fobj.write(b"aaa")
fobj.close()
tar.add(path)
tar.close()
self.assert_(os.path.getsize(tmpname) > 0,
"tarfile is empty")
# The test_*_size tests test for bug #1167128.
def test_file_size(self):
tar = tarfile.open(tmpname, self.mode)
path = os.path.join(TEMPDIR, "file")
fobj = open(path, "wb")
fobj.close()
tarinfo = tar.gettarinfo(path)
self.assertEqual(tarinfo.size, 0)
fobj = open(path, "wb")
fobj.write(b"aaa")
fobj.close()
tarinfo = tar.gettarinfo(path)
self.assertEqual(tarinfo.size, 3)
tar.close()
def test_directory_size(self):
path = os.path.join(TEMPDIR, "directory")
os.mkdir(path)
try:
tar = tarfile.open(tmpname, self.mode)
tarinfo = tar.gettarinfo(path)
self.assertEqual(tarinfo.size, 0)
finally:
os.rmdir(path)
def test_link_size(self):
if hasattr(os, "link"):
link = os.path.join(TEMPDIR, "link")
target = os.path.join(TEMPDIR, "link_target")
open(target, "wb").close()
os.link(target, link)
try:
tar = tarfile.open(tmpname, self.mode)
tarinfo = tar.gettarinfo(link)
self.assertEqual(tarinfo.size, 0)
finally:
os.remove(target)
os.remove(link)
def test_symlink_size(self):
if hasattr(os, "symlink"):
path = os.path.join(TEMPDIR, "symlink")
os.symlink("link_target", path)
try:
tar = tarfile.open(tmpname, self.mode)
tarinfo = tar.gettarinfo(path)
self.assertEqual(tarinfo.size, 0)
finally:
os.remove(path)
def test_add_self(self):
# Test for #1257255.
dstname = os.path.abspath(tmpname)
tar = tarfile.open(tmpname, self.mode)
self.assert_(tar.name == dstname, "archive name must be absolute")
tar.add(dstname)
self.assert_(tar.getnames() == [], "added the archive to itself")
cwd = os.getcwd()
os.chdir(TEMPDIR)
tar.add(dstname)
os.chdir(cwd)
self.assert_(tar.getnames() == [], "added the archive to itself")
def test_exclude(self):
tempdir = os.path.join(TEMPDIR, "exclude")
os.mkdir(tempdir)
try:
for name in ("foo", "bar", "baz"):
name = os.path.join(tempdir, name)
open(name, "wb").close()
def exclude(name):
return os.path.isfile(name)
tar = tarfile.open(tmpname, self.mode, encoding="iso8859-1")
tar.add(tempdir, arcname="empty_dir", exclude=exclude)
tar.close()
tar = tarfile.open(tmpname, "r")
self.assertEqual(len(tar.getmembers()), 1)
self.assertEqual(tar.getnames()[0], "empty_dir")
finally:
shutil.rmtree(tempdir)
class StreamWriteTest(WriteTestBase):
mode = "w|"
def test_stream_padding(self):
# Test for bug #1543303.
tar = tarfile.open(tmpname, self.mode)
tar.close()
if self.mode.endswith("gz"):
fobj = gzip.GzipFile(tmpname)
data = fobj.read()
fobj.close()
elif self.mode.endswith("bz2"):
dec = bz2.BZ2Decompressor()
data = open(tmpname, "rb").read()
data = dec.decompress(data)
self.assert_(len(dec.unused_data) == 0,
"found trailing data")
else:
fobj = open(tmpname, "rb")
data = fobj.read()
fobj.close()
self.assert_(data.count(b"\0") == tarfile.RECORDSIZE,
"incorrect zero padding")
class GNUWriteTest(unittest.TestCase):
# This testcase checks for correct creation of GNU Longname
# and Longlink extended headers (cp. bug #812325).
def _length(self, s):
blocks, remainder = divmod(len(s) + 1, 512)
if remainder:
blocks += 1
return blocks * 512
def _calc_size(self, name, link=None):
# Initial tar header
count = 512
if len(name) > tarfile.LENGTH_NAME:
# GNU longname extended header + longname
count += 512
count += self._length(name)
if link is not None and len(link) > tarfile.LENGTH_LINK:
# GNU longlink extended header + longlink
count += 512
count += self._length(link)
return count
def _test(self, name, link=None):
tarinfo = tarfile.TarInfo(name)
if link:
tarinfo.linkname = link
tarinfo.type = tarfile.LNKTYPE
tar = tarfile.open(tmpname, "w")
tar.format = tarfile.GNU_FORMAT
tar.addfile(tarinfo)
v1 = self._calc_size(name, link)
v2 = tar.offset
self.assert_(v1 == v2, "GNU longname/longlink creation failed")
tar.close()
tar = tarfile.open(tmpname)
member = tar.next()
self.failIf(member is None, "unable to read longname member")
self.assert_(tarinfo.name == member.name and \
tarinfo.linkname == member.linkname, \
"unable to read longname member")
def test_longname_1023(self):
self._test(("longnam/" * 127) + "longnam")
def test_longname_1024(self):
self._test(("longnam/" * 127) + "longname")
def test_longname_1025(self):
self._test(("longnam/" * 127) + "longname_")
def test_longlink_1023(self):
self._test("name", ("longlnk/" * 127) + "longlnk")
def test_longlink_1024(self):
self._test("name", ("longlnk/" * 127) + "longlink")
def test_longlink_1025(self):
self._test("name", ("longlnk/" * 127) + "longlink_")
def test_longnamelink_1023(self):
self._test(("longnam/" * 127) + "longnam",
("longlnk/" * 127) + "longlnk")
def test_longnamelink_1024(self):
self._test(("longnam/" * 127) + "longname",
("longlnk/" * 127) + "longlink")
def test_longnamelink_1025(self):
self._test(("longnam/" * 127) + "longname_",
("longlnk/" * 127) + "longlink_")
class HardlinkTest(unittest.TestCase):
# Test the creation of LNKTYPE (hardlink) members in an archive.
def setUp(self):
self.foo = os.path.join(TEMPDIR, "foo")
self.bar = os.path.join(TEMPDIR, "bar")
fobj = open(self.foo, "wb")
fobj.write(b"foo")
fobj.close()
os.link(self.foo, self.bar)
self.tar = tarfile.open(tmpname, "w")
self.tar.add(self.foo)
def tearDown(self):
self.tar.close()
os.remove(self.foo)
os.remove(self.bar)
def test_add_twice(self):
# The same name will be added as a REGTYPE every
# time regardless of st_nlink.
tarinfo = self.tar.gettarinfo(self.foo)
self.assert_(tarinfo.type == tarfile.REGTYPE,
"add file as regular failed")
def test_add_hardlink(self):
tarinfo = self.tar.gettarinfo(self.bar)
self.assert_(tarinfo.type == tarfile.LNKTYPE,
"add file as hardlink failed")
def test_dereference_hardlink(self):
self.tar.dereference = True
tarinfo = self.tar.gettarinfo(self.bar)
self.assert_(tarinfo.type == tarfile.REGTYPE,
"dereferencing hardlink failed")
class PaxWriteTest(GNUWriteTest):
def _test(self, name, link=None):
# See GNUWriteTest.
tarinfo = tarfile.TarInfo(name)
if link:
tarinfo.linkname = link
tarinfo.type = tarfile.LNKTYPE
tar = tarfile.open(tmpname, "w", format=tarfile.PAX_FORMAT)
tar.addfile(tarinfo)
tar.close()
tar = tarfile.open(tmpname)
if link:
l = tar.getmembers()[0].linkname
self.assert_(link == l, "PAX longlink creation failed")
else:
n = tar.getmembers()[0].name
self.assert_(name == n, "PAX longname creation failed")
def test_pax_global_header(self):
pax_headers = {
"foo": "bar",
"uid": "0",
"mtime": "1.23",
"test": "\xe4\xf6\xfc",
"\xe4\xf6\xfc": "test"}
tar = tarfile.open(tmpname, "w", format=tarfile.PAX_FORMAT, \
pax_headers=pax_headers)
tar.addfile(tarfile.TarInfo("test"))
tar.close()
# Test if the global header was written correctly.
tar = tarfile.open(tmpname, encoding="iso8859-1")
self.assertEqual(tar.pax_headers, pax_headers)
self.assertEqual(tar.getmembers()[0].pax_headers, pax_headers)
# Test if all the fields are strings.
for key, val in tar.pax_headers.items():
self.assert_(type(key) is not bytes)
self.assert_(type(val) is not bytes)
if key in tarfile.PAX_NUMBER_FIELDS:
try:
tarfile.PAX_NUMBER_FIELDS[key](val)
except (TypeError, ValueError):
self.fail("unable to convert pax header field")
def test_pax_extended_header(self):
# The fields from the pax header have priority over the
# TarInfo.
pax_headers = {"path": "foo", "uid": "123"}
tar = tarfile.open(tmpname, "w", format=tarfile.PAX_FORMAT, encoding="iso8859-1")
t = tarfile.TarInfo()
t.name = "\xe4\xf6\xfc" # non-ASCII
t.uid = 8**8 # too large
t.pax_headers = pax_headers
tar.addfile(t)
tar.close()
tar = tarfile.open(tmpname, encoding="iso8859-1")
t = tar.getmembers()[0]
self.assertEqual(t.pax_headers, pax_headers)
self.assertEqual(t.name, "foo")
self.assertEqual(t.uid, 123)
class UstarUnicodeTest(unittest.TestCase):
format = tarfile.USTAR_FORMAT
def test_iso8859_1_filename(self):
self._test_unicode_filename("iso8859-1")
def test_utf7_filename(self):
self._test_unicode_filename("utf7")
def test_utf8_filename(self):
self._test_unicode_filename("utf8")
def _test_unicode_filename(self, encoding):
tar = tarfile.open(tmpname, "w", format=self.format, encoding=encoding, errors="strict")
name = "\xe4\xf6\xfc"
tar.addfile(tarfile.TarInfo(name))
tar.close()
tar = tarfile.open(tmpname, encoding=encoding)
self.assertEqual(tar.getmembers()[0].name, name)
tar.close()
def test_unicode_filename_error(self):
if self.format == tarfile.PAX_FORMAT:
# PAX_FORMAT ignores encoding in write mode.
return
tar = tarfile.open(tmpname, "w", format=self.format, encoding="ascii", errors="strict")
tarinfo = tarfile.TarInfo()
tarinfo.name = "\xe4\xf6\xfc"
self.assertRaises(UnicodeError, tar.addfile, tarinfo)
tarinfo.name = "foo"
tarinfo.uname = "\xe4\xf6\xfc"
self.assertRaises(UnicodeError, tar.addfile, tarinfo)
def test_unicode_argument(self):
tar = tarfile.open(tarname, "r", encoding="iso8859-1", errors="strict")
for t in tar:
self.assert_(type(t.name) is str)
self.assert_(type(t.linkname) is str)
self.assert_(type(t.uname) is str)
self.assert_(type(t.gname) is str)
tar.close()
def test_uname_unicode(self):
t = tarfile.TarInfo("foo")
t.uname = "\xe4\xf6\xfc"
t.gname = "\xe4\xf6\xfc"
tar = tarfile.open(tmpname, mode="w", format=self.format, encoding="iso8859-1")
tar.addfile(t)
tar.close()
tar = tarfile.open(tmpname, encoding="iso8859-1")
t = tar.getmember("foo")
self.assertEqual(t.uname, "\xe4\xf6\xfc")
self.assertEqual(t.gname, "\xe4\xf6\xfc")
if self.format != tarfile.PAX_FORMAT:
tar = tarfile.open(tmpname, encoding="ascii")
t = tar.getmember("foo")
self.assertEqual(t.uname, "\ufffd\ufffd\ufffd")
self.assertEqual(t.gname, "\ufffd\ufffd\ufffd")
class GNUUnicodeTest(UstarUnicodeTest):
format = tarfile.GNU_FORMAT
class PAXUnicodeTest(UstarUnicodeTest):
format = tarfile.PAX_FORMAT
class AppendTest(unittest.TestCase):
# Test append mode (cp. patch #1652681).
def setUp(self):
self.tarname = tmpname
if os.path.exists(self.tarname):
os.remove(self.tarname)
def _add_testfile(self, fileobj=None):
tar = tarfile.open(self.tarname, "a", fileobj=fileobj)
tar.addfile(tarfile.TarInfo("bar"))
tar.close()
def _create_testtar(self, mode="w:"):
src = tarfile.open(tarname, encoding="iso8859-1")
t = src.getmember("ustar/regtype")
t.name = "foo"
f = src.extractfile(t)
tar = tarfile.open(self.tarname, mode)
tar.addfile(t, f)
tar.close()
def _test(self, names=["bar"], fileobj=None):
tar = tarfile.open(self.tarname, fileobj=fileobj)
self.assertEqual(tar.getnames(), names)
def test_non_existing(self):
self._add_testfile()
self._test()
def test_empty(self):
open(self.tarname, "w").close()
self._add_testfile()
self._test()
def test_empty_fileobj(self):
fobj = io.BytesIO()
self._add_testfile(fobj)
fobj.seek(0)
self._test(fileobj=fobj)
def test_fileobj(self):
self._create_testtar()
data = open(self.tarname, "rb").read()
fobj = io.BytesIO(data)
self._add_testfile(fobj)
fobj.seek(0)
self._test(names=["foo", "bar"], fileobj=fobj)
def test_existing(self):
self._create_testtar()
self._add_testfile()
self._test(names=["foo", "bar"])
def test_append_gz(self):
if gzip is None:
return
self._create_testtar("w:gz")
self.assertRaises(tarfile.ReadError, tarfile.open, tmpname, "a")
def test_append_bz2(self):
if bz2 is None:
return
self._create_testtar("w:bz2")
self.assertRaises(tarfile.ReadError, tarfile.open, tmpname, "a")
class LimitsTest(unittest.TestCase):
def test_ustar_limits(self):
# 100 char name
tarinfo = tarfile.TarInfo("0123456789" * 10)
tarinfo.tobuf(tarfile.USTAR_FORMAT)
# 101 char name that cannot be stored
tarinfo = tarfile.TarInfo("0123456789" * 10 + "0")
self.assertRaises(ValueError, tarinfo.tobuf, tarfile.USTAR_FORMAT)
# 256 char name with a slash at pos 156
tarinfo = tarfile.TarInfo("123/" * 62 + "longname")
tarinfo.tobuf(tarfile.USTAR_FORMAT)
# 256 char name that cannot be stored
tarinfo = tarfile.TarInfo("1234567/" * 31 + "longname")
self.assertRaises(ValueError, tarinfo.tobuf, tarfile.USTAR_FORMAT)
# 512 char name
tarinfo = tarfile.TarInfo("123/" * 126 + "longname")
self.assertRaises(ValueError, tarinfo.tobuf, tarfile.USTAR_FORMAT)
# 512 char linkname
tarinfo = tarfile.TarInfo("longlink")
tarinfo.linkname = "123/" * 126 + "longname"
self.assertRaises(ValueError, tarinfo.tobuf, tarfile.USTAR_FORMAT)
# uid > 8 digits
tarinfo = tarfile.TarInfo("name")
tarinfo.uid = 0o10000000
self.assertRaises(ValueError, tarinfo.tobuf, tarfile.USTAR_FORMAT)
def test_gnu_limits(self):
tarinfo = tarfile.TarInfo("123/" * 126 + "longname")
tarinfo.tobuf(tarfile.GNU_FORMAT)
tarinfo = tarfile.TarInfo("longlink")
tarinfo.linkname = "123/" * 126 + "longname"
tarinfo.tobuf(tarfile.GNU_FORMAT)
# uid >= 256 ** 7
tarinfo = tarfile.TarInfo("name")
tarinfo.uid = 0o4000000000000000000
self.assertRaises(ValueError, tarinfo.tobuf, tarfile.GNU_FORMAT)
def test_pax_limits(self):
tarinfo = tarfile.TarInfo("123/" * 126 + "longname")
tarinfo.tobuf(tarfile.PAX_FORMAT)
tarinfo = tarfile.TarInfo("longlink")
tarinfo.linkname = "123/" * 126 + "longname"
tarinfo.tobuf(tarfile.PAX_FORMAT)
tarinfo = tarfile.TarInfo("name")
tarinfo.uid = 0o4000000000000000000
tarinfo.tobuf(tarfile.PAX_FORMAT)
class MiscTest(unittest.TestCase):
def test_char_fields(self):
self.assertEqual(tarfile.stn("foo", 8, "ascii", "strict"), b"foo\0\0\0\0\0")
self.assertEqual(tarfile.stn("foobar", 3, "ascii", "strict"), b"foo")
self.assertEqual(tarfile.nts(b"foo\0\0\0\0\0", "ascii", "strict"), "foo")
self.assertEqual(tarfile.nts(b"foo\0bar\0", "ascii", "strict"), "foo")
def test_number_fields(self):
self.assertEqual(tarfile.itn(1), b"0000001\x00")
self.assertEqual(tarfile.itn(0xffffffff), b"\x80\x00\x00\x00\xff\xff\xff\xff")
class GzipMiscReadTest(MiscReadTest):
tarname = gzipname
mode = "r:gz"
class GzipUstarReadTest(UstarReadTest):
tarname = gzipname
mode = "r:gz"
class GzipStreamReadTest(StreamReadTest):
tarname = gzipname
mode = "r|gz"
class GzipWriteTest(WriteTest):
mode = "w:gz"
class GzipStreamWriteTest(StreamWriteTest):
mode = "w|gz"
class Bz2MiscReadTest(MiscReadTest):
tarname = bz2name
mode = "r:bz2"
class Bz2UstarReadTest(UstarReadTest):
tarname = bz2name
mode = "r:bz2"
class Bz2StreamReadTest(StreamReadTest):
tarname = bz2name
mode = "r|bz2"
class Bz2WriteTest(WriteTest):
mode = "w:bz2"
class Bz2StreamWriteTest(StreamWriteTest):
mode = "w|bz2"
class Bz2PartialReadTest(unittest.TestCase):
# Issue5068: The _BZ2Proxy.read() method loops forever
# on an empty or partial bzipped file.
def _test_partial_input(self, mode):
class MyBytesIO(io.BytesIO):
hit_eof = False
def read(self, n):
if self.hit_eof:
raise AssertionError("infinite loop detected in tarfile.open()")
self.hit_eof = self.tell() == len(self.getvalue())
return super(MyBytesIO, self).read(n)
data = bz2.compress(tarfile.TarInfo("foo").tobuf())
for x in range(len(data) + 1):
tarfile.open(fileobj=MyBytesIO(data[:x]), mode=mode)
def test_partial_input(self):
self._test_partial_input("r")
def test_partial_input_bz2(self):
self._test_partial_input("r:bz2")
def test_main():
if not os.path.exists(TEMPDIR):
os.mkdir(TEMPDIR)
tests = [
UstarReadTest,
MiscReadTest,
StreamReadTest,
DetectReadTest,
MemberReadTest,
GNUReadTest,
PaxReadTest,
WriteTest,
StreamWriteTest,
GNUWriteTest,
PaxWriteTest,
UstarUnicodeTest,
GNUUnicodeTest,
PAXUnicodeTest,
AppendTest,
LimitsTest,
MiscTest,
]
if hasattr(os, "link"):
tests.append(HardlinkTest)
fobj = open(tarname, "rb")
data = fobj.read()
fobj.close()
if gzip:
# Create testtar.tar.gz and add gzip-specific tests.
tar = gzip.open(gzipname, "wb")
tar.write(data)
tar.close()
tests += [
GzipMiscReadTest,
GzipUstarReadTest,
GzipStreamReadTest,
GzipWriteTest,
GzipStreamWriteTest,
]
if bz2:
# Create testtar.tar.bz2 and add bz2-specific tests.
tar = bz2.BZ2File(bz2name, "wb")
tar.write(data)
tar.close()
tests += [
Bz2MiscReadTest,
Bz2UstarReadTest,
Bz2StreamReadTest,
Bz2WriteTest,
Bz2StreamWriteTest,
Bz2PartialReadTest,
]
try:
support.run_unittest(*tests)
finally:
if os.path.exists(TEMPDIR):
shutil.rmtree(TEMPDIR)
if __name__ == "__main__":
test_main()
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