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test_tarfile.py
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4890 lines (4190 loc) · 190 KB
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import errno
import sys
import os
import io
from hashlib import sha256
from contextlib import contextmanager, ExitStack
from random import Random
import pathlib
import shutil
import re
import warnings
import stat
import unittest
import unittest.mock
import tarfile
from test import archiver_tests
from test import support
from test.support import os_helper
from test.support import script_helper
from test.support import warnings_helper
# Check for our compression modules.
try:
import gzip
except ImportError:
gzip = None
try:
import zlib
except ImportError:
zlib = None
try:
import bz2
except ImportError:
bz2 = None
try:
import lzma
except ImportError:
lzma = None
try:
from compression import zstd
except ImportError:
zstd = None
def sha256sum(data):
return sha256(data).hexdigest()
TEMPDIR = os.path.abspath(os_helper.TESTFN) + "-tardir"
tarextdir = TEMPDIR + '-extract-test'
tarname = support.findfile("testtar.tar", subdir="archivetestdata")
gzipname = os.path.join(TEMPDIR, "testtar.tar.gz")
bz2name = os.path.join(TEMPDIR, "testtar.tar.bz2")
xzname = os.path.join(TEMPDIR, "testtar.tar.xz")
zstname = os.path.join(TEMPDIR, "testtar.tar.zst")
tmpname = os.path.join(TEMPDIR, "tmp.tar")
dotlessname = os.path.join(TEMPDIR, "testtar")
SPACE = b" "
sha256_regtype = (
"e09e4bc8b3c9d9177e77256353b36c159f5f040531bbd4b024a8f9b9196c71ce"
)
sha256_sparse = (
"4f05a776071146756345ceee937b33fc5644f5a96b9780d1c7d6a32cdf164d7b"
)
class TarTest:
tarname = tarname
suffix = ''
open = io.FileIO
taropen = tarfile.TarFile.taropen
@property
def mode(self):
return self.prefix + self.suffix
@support.requires_gzip()
class GzipTest:
tarname = gzipname
suffix = 'gz'
open = gzip.GzipFile if gzip else None
taropen = tarfile.TarFile.gzopen
@support.requires_bz2()
class Bz2Test:
tarname = bz2name
suffix = 'bz2'
open = bz2.BZ2File if bz2 else None
taropen = tarfile.TarFile.bz2open
@support.requires_lzma()
class LzmaTest:
tarname = xzname
suffix = 'xz'
open = lzma.LZMAFile if lzma else None
taropen = tarfile.TarFile.xzopen
@support.requires_zstd()
class ZstdTest:
tarname = zstname
suffix = 'zst'
open = zstd.ZstdFile if zstd else None
taropen = tarfile.TarFile.zstopen
class ReadTest(TarTest):
prefix = "r:"
def setUp(self):
self.tar = tarfile.open(self.tarname, mode=self.mode,
encoding="iso8859-1")
def tearDown(self):
self.tar.close()
class StreamModeTest(ReadTest):
# Only needs to change how the tarfile is opened to set
# stream mode
def setUp(self):
self.tar = tarfile.open(self.tarname, mode=self.mode,
encoding="iso8859-1",
stream=True)
class UstarReadTest(ReadTest, unittest.TestCase):
def test_fileobj_regular_file(self):
tarinfo = self.tar.getmember("ustar/regtype")
with self.tar.extractfile(tarinfo) as fobj:
data = fobj.read()
self.assertEqual(len(data), tarinfo.size,
"regular file extraction failed")
self.assertEqual(sha256sum(data), sha256_regtype,
"regular file extraction failed")
def test_fileobj_readlines(self):
self.tar.extract("ustar/regtype", TEMPDIR, filter='data')
tarinfo = self.tar.getmember("ustar/regtype")
with open(os.path.join(TEMPDIR, "ustar/regtype"), "r") as fobj1:
lines1 = fobj1.readlines()
with self.tar.extractfile(tarinfo) as fobj:
fobj2 = io.TextIOWrapper(fobj)
lines2 = fobj2.readlines()
self.assertEqual(lines1, lines2,
"fileobj.readlines() failed")
self.assertEqual(len(lines2), 114,
"fileobj.readlines() failed")
self.assertEqual(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, filter='data')
tarinfo = self.tar.getmember("ustar/regtype")
with open(os.path.join(TEMPDIR, "ustar/regtype"), "r") as fobj1:
lines1 = fobj1.readlines()
with self.tar.extractfile(tarinfo) as fobj2:
lines2 = list(io.TextIOWrapper(fobj2))
self.assertEqual(lines1, lines2,
"fileobj.__iter__() failed")
def test_fileobj_seek(self):
self.tar.extract("ustar/regtype", TEMPDIR,
filter='data')
with open(os.path.join(TEMPDIR, "ustar/regtype"), "rb") as fobj:
data = fobj.read()
tarinfo = self.tar.getmember("ustar/regtype")
with self.tar.extractfile(tarinfo) as fobj:
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.assertEqual(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.assertEqual(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.assertEqual(s1, s2,
"readlines() after seek failed")
fobj.seek(0)
self.assertEqual(len(fobj.readline()), fobj.tell(),
"tell() after readline() failed")
fobj.seek(512)
self.assertEqual(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")
def test_fileobj_text(self):
with self.tar.extractfile("ustar/regtype") as fobj:
fobj = io.TextIOWrapper(fobj)
data = fobj.read().encode("iso8859-1")
self.assertEqual(sha256sum(data), sha256_regtype)
try:
fobj.seek(100)
except AttributeError:
# Issue #13815: seek() complained about a missing
# flush() method.
self.fail("seeking failed in text mode")
# Test if symbolic and hard links are resolved by extractfile(). The
# test link members each point to a regular member whose data is
# supposed to be exported.
def _test_fileobj_link(self, lnktype, regtype):
with self.tar.extractfile(lnktype) as a, \
self.tar.extractfile(regtype) as b:
self.assertEqual(a.name, b.name)
def test_fileobj_link1(self):
self._test_fileobj_link("ustar/lnktype", "ustar/regtype")
def test_fileobj_link2(self):
self._test_fileobj_link("./ustar/linktest2/lnktype",
"ustar/linktest1/regtype")
def test_fileobj_symlink1(self):
self._test_fileobj_link("ustar/symtype", "ustar/regtype")
def test_fileobj_symlink2(self):
self._test_fileobj_link("./ustar/linktest2/symtype",
"ustar/linktest1/regtype")
def test_issue14160(self):
self._test_fileobj_link("symtype2", "ustar/regtype")
def test_add_dir_getmember(self):
# bpo-21987
self.add_dir_and_getmember('bar')
self.add_dir_and_getmember('a'*101)
@unittest.skipUnless(hasattr(os, "getuid") and hasattr(os, "getgid"),
"Missing getuid or getgid implementation")
def add_dir_and_getmember(self, name):
def filter(tarinfo):
tarinfo.uid = tarinfo.gid = 100
return tarinfo
with os_helper.temp_cwd():
with tarfile.open(tmpname, 'w') as tar:
tar.format = tarfile.USTAR_FORMAT
try:
os.mkdir(name)
tar.add(name, filter=filter)
finally:
os.rmdir(name)
with tarfile.open(tmpname) as tar:
self.assertEqual(
tar.getmember(name),
tar.getmember(name + '/')
)
class GzipUstarReadTest(GzipTest, UstarReadTest):
pass
class Bz2UstarReadTest(Bz2Test, UstarReadTest):
pass
class LzmaUstarReadTest(LzmaTest, UstarReadTest):
pass
class ZstdUstarReadTest(ZstdTest, UstarReadTest):
pass
class ListTest(ReadTest, unittest.TestCase):
# Override setUp to use default encoding (UTF-8)
def setUp(self):
self.tar = tarfile.open(self.tarname, mode=self.mode)
def test_list(self):
tio = io.TextIOWrapper(io.BytesIO(), 'ascii', newline='\n')
with support.swap_attr(sys, 'stdout', tio):
self.tar.list(verbose=False)
out = tio.detach().getvalue()
self.assertIn(b'ustar/conttype', out)
self.assertIn(b'ustar/regtype', out)
self.assertIn(b'ustar/lnktype', out)
self.assertIn(b'ustar' + (b'/12345' * 40) + b'67/longname', out)
self.assertIn(b'./ustar/linktest2/symtype', out)
self.assertIn(b'./ustar/linktest2/lnktype', out)
# Make sure it puts trailing slash for directory
self.assertIn(b'ustar/dirtype/', out)
self.assertIn(b'ustar/dirtype-with-size/', out)
# Make sure it is able to print unencodable characters
def conv(b):
s = b.decode(self.tar.encoding, 'surrogateescape')
return s.encode('ascii', 'backslashreplace')
self.assertIn(conv(b'ustar/umlauts-\xc4\xd6\xdc\xe4\xf6\xfc\xdf'), out)
self.assertIn(conv(b'misc/regtype-hpux-signed-chksum-'
b'\xc4\xd6\xdc\xe4\xf6\xfc\xdf'), out)
self.assertIn(conv(b'misc/regtype-old-v7-signed-chksum-'
b'\xc4\xd6\xdc\xe4\xf6\xfc\xdf'), out)
self.assertIn(conv(b'pax/bad-pax-\xe4\xf6\xfc'), out)
self.assertIn(conv(b'pax/hdrcharset-\xe4\xf6\xfc'), out)
# Make sure it prints files separated by one newline without any
# 'ls -l'-like accessories if verbose flag is not being used
# ...
# ustar/conttype
# ustar/regtype
# ...
self.assertRegex(out, br'ustar/conttype ?\r?\n'
br'ustar/regtype ?\r?\n')
# Make sure it does not print the source of link without verbose flag
self.assertNotIn(b'link to', out)
self.assertNotIn(b'->', out)
def test_list_verbose(self):
tio = io.TextIOWrapper(io.BytesIO(), 'ascii', newline='\n')
with support.swap_attr(sys, 'stdout', tio):
self.tar.list(verbose=True)
out = tio.detach().getvalue()
# Make sure it prints files separated by one newline with 'ls -l'-like
# accessories if verbose flag is being used
# ...
# ?rw-r--r-- tarfile/tarfile 7011 2003-01-06 07:19:43 ustar/conttype
# -rw-r--r-- tarfile/tarfile 7011 2003-01-06 07:19:43 ustar/regtype
# drwxr-xr-x tarfile/tarfile 0 2003-01-05 15:19:43 ustar/dirtype/
# ...
#
# Array of values to modify the regex below:
# ((file_type, file_permissions, file_length), ...)
type_perm_lengths = (
(br'\?', b'rw-r--r--', b'7011'), (b'-', b'rw-r--r--', b'7011'),
(b'd', b'rwxr-xr-x', b'0'), (b'd', b'rwxr-xr-x', b'255'),
(br'\?', b'rw-r--r--', b'0'), (b'l', b'rwxrwxrwx', b'0'),
(b'b', b'rw-rw----', b'3,0'), (b'c', b'rw-rw-rw-', b'1,3'),
(b'p', b'rw-r--r--', b'0'))
self.assertRegex(out, b''.join(
[(tp + (br'%s tarfile/tarfile\s+%s ' % (perm, ln) +
br'\d{4}-\d\d-\d\d\s+\d\d:\d\d:\d\d '
br'ustar/\w+type[/>\sa-z-]*\n')) for tp, perm, ln
in type_perm_lengths]))
# Make sure it prints the source of link with verbose flag
self.assertIn(b'ustar/symtype -> regtype', out)
self.assertIn(b'./ustar/linktest2/symtype -> ../linktest1/regtype', out)
self.assertIn(b'./ustar/linktest2/lnktype link to '
b'./ustar/linktest1/regtype', out)
self.assertIn(b'gnu' + (b'/123' * 125) + b'/longlink link to gnu' +
(b'/123' * 125) + b'/longname', out)
self.assertIn(b'pax' + (b'/123' * 125) + b'/longlink link to pax' +
(b'/123' * 125) + b'/longname', out)
def test_list_members(self):
tio = io.TextIOWrapper(io.BytesIO(), 'ascii', newline='\n')
def members(tar):
for tarinfo in tar.getmembers():
if 'reg' in tarinfo.name:
yield tarinfo
with support.swap_attr(sys, 'stdout', tio):
self.tar.list(verbose=False, members=members(self.tar))
out = tio.detach().getvalue()
self.assertIn(b'ustar/regtype', out)
self.assertNotIn(b'ustar/conttype', out)
class GzipListTest(GzipTest, ListTest):
pass
class Bz2ListTest(Bz2Test, ListTest):
pass
class LzmaListTest(LzmaTest, ListTest):
pass
class ZstdListTest(ZstdTest, ListTest):
pass
class CommonReadTest(ReadTest):
def test_is_tarfile_erroneous(self):
with open(tmpname, "wb"):
pass
# is_tarfile works on filenames
self.assertFalse(tarfile.is_tarfile(tmpname))
# is_tarfile works on path-like objects
self.assertFalse(tarfile.is_tarfile(os_helper.FakePath(tmpname)))
# is_tarfile works on file objects
with open(tmpname, "rb") as fobj:
self.assertFalse(tarfile.is_tarfile(fobj))
# is_tarfile works on file-like objects
self.assertFalse(tarfile.is_tarfile(io.BytesIO(b"invalid")))
def test_is_tarfile_valid(self):
# is_tarfile works on filenames
self.assertTrue(tarfile.is_tarfile(self.tarname))
# is_tarfile works on path-like objects
self.assertTrue(tarfile.is_tarfile(os_helper.FakePath(self.tarname)))
# is_tarfile works on file objects
with open(self.tarname, "rb") as fobj:
self.assertTrue(tarfile.is_tarfile(fobj))
# is_tarfile works on file-like objects
with open(self.tarname, "rb") as fobj:
self.assertTrue(tarfile.is_tarfile(io.BytesIO(fobj.read())))
def test_is_tarfile_keeps_position(self):
# Test for issue44289: tarfile.is_tarfile() modifies
# file object's current position
with open(self.tarname, "rb") as fobj:
tarfile.is_tarfile(fobj)
self.assertEqual(fobj.tell(), 0)
with open(self.tarname, "rb") as fobj:
file_like = io.BytesIO(fobj.read())
tarfile.is_tarfile(file_like)
self.assertEqual(file_like.tell(), 0)
def test_empty_tarfile(self):
# Test for issue6123: Allow opening empty archives.
# This test checks if tarfile.open() is able to open an empty tar
# archive successfully. Note that an empty tar archive is not the
# same as an empty file!
with tarfile.open(tmpname, self.mode.replace("r", "w")):
pass
try:
tar = tarfile.open(tmpname, self.mode)
tar.getnames()
except tarfile.ReadError:
self.fail("tarfile.open() failed on empty archive")
else:
self.assertListEqual(tar.getmembers(), [])
finally:
tar.close()
def test_non_existent_tarfile(self):
# Test for issue11513: prevent non-existent gzipped tarfiles raising
# multiple exceptions.
with self.assertRaisesRegex(FileNotFoundError, "xxx"):
tarfile.open("xxx", self.mode)
def test_null_tarfile(self):
# Test for issue6123: Allow opening empty archives.
# This test guarantees that tarfile.open() does not treat an empty
# file as an empty tar archive.
with open(tmpname, "wb"):
pass
self.assertRaises(tarfile.ReadError, tarfile.open, tmpname, self.mode)
self.assertRaises(tarfile.ReadError, tarfile.open, tmpname)
def test_ignore_zeros(self):
# Test TarFile's ignore_zeros option.
# generate 512 pseudorandom bytes
data = Random(0).randbytes(512)
for char in (b'\0', b'a'):
# Test if EOFHeaderError ('\0') and InvalidHeaderError ('a')
# are ignored correctly.
with self.open(tmpname, "w") as fobj:
fobj.write(char * 1024)
tarinfo = tarfile.TarInfo("foo")
tarinfo.size = len(data)
fobj.write(tarinfo.tobuf())
fobj.write(data)
tar = tarfile.open(tmpname, mode="r", ignore_zeros=True)
try:
self.assertListEqual(tar.getnames(), ["foo"],
"ignore_zeros=True should have skipped the %r-blocks" %
char)
finally:
tar.close()
def test_premature_end_of_archive(self):
for size in (512, 600, 1024, 1200):
with tarfile.open(tmpname, "w:") as tar:
t = tarfile.TarInfo("foo")
t.size = 1024
tar.addfile(t, io.BytesIO(b"a" * 1024))
with open(tmpname, "r+b") as fobj:
fobj.truncate(size)
with tarfile.open(tmpname) as tar:
with self.assertRaisesRegex(tarfile.ReadError, "unexpected end of data"):
for t in tar:
pass
with tarfile.open(tmpname) as tar:
t = tar.next()
with self.assertRaisesRegex(tarfile.ReadError, "unexpected end of data"):
tar.extract(t, TEMPDIR, filter='data')
with self.assertRaisesRegex(tarfile.ReadError, "unexpected end of data"):
tar.extractfile(t).read()
def test_length_zero_header(self):
# bpo-39017 (CVE-2019-20907): reading a zero-length header should fail
# with an exception
with self.assertRaisesRegex(tarfile.ReadError, "file could not be opened successfully"):
with tarfile.open(support.findfile('recursion.tar', subdir='archivetestdata')):
pass
def test_extractfile_attrs(self):
# gh-74468: TarFile.name must name a file, not a parent archive.
file = self.tar.getmember('ustar/regtype')
with self.tar.extractfile(file) as fobj:
self.assertEqual(fobj.name, 'ustar/regtype')
self.assertRaises(AttributeError, fobj.fileno)
self.assertEqual(fobj.mode, 'rb')
self.assertIs(fobj.readable(), True)
self.assertIs(fobj.writable(), False)
if self.is_stream:
self.assertRaises(AttributeError, fobj.seekable)
else:
self.assertIs(fobj.seekable(), True)
self.assertIs(fobj.closed, False)
self.assertIs(fobj.closed, True)
self.assertEqual(fobj.name, 'ustar/regtype')
self.assertRaises(AttributeError, fobj.fileno)
self.assertEqual(fobj.mode, 'rb')
self.assertIs(fobj.readable(), True)
self.assertIs(fobj.writable(), False)
if self.is_stream:
self.assertRaises(AttributeError, fobj.seekable)
else:
self.assertIs(fobj.seekable(), True)
class MiscReadTestBase(CommonReadTest):
is_stream = False
def test_no_name_argument(self):
with open(self.tarname, "rb") as fobj:
self.assertIsInstance(fobj.name, str)
with tarfile.open(fileobj=fobj, mode=self.mode) as tar:
self.assertIsInstance(tar.name, str)
self.assertEqual(tar.name, os.path.abspath(fobj.name))
def test_no_name_attribute(self):
with open(self.tarname, "rb") as fobj:
data = fobj.read()
fobj = io.BytesIO(data)
self.assertRaises(AttributeError, getattr, fobj, "name")
tar = tarfile.open(fileobj=fobj, mode=self.mode)
self.assertIsNone(tar.name)
def test_empty_name_attribute(self):
with open(self.tarname, "rb") as fobj:
data = fobj.read()
fobj = io.BytesIO(data)
fobj.name = ""
with tarfile.open(fileobj=fobj, mode=self.mode) as tar:
self.assertIsNone(tar.name)
def test_int_name_attribute(self):
# Issue 21044: tarfile.open() should handle fileobj with an integer
# 'name' attribute.
fd = os.open(self.tarname, os.O_RDONLY)
with open(fd, 'rb') as fobj:
self.assertIsInstance(fobj.name, int)
with tarfile.open(fileobj=fobj, mode=self.mode) as tar:
self.assertIsNone(tar.name)
def test_bytes_name_attribute(self):
tarname = os.fsencode(self.tarname)
with open(tarname, 'rb') as fobj:
self.assertIsInstance(fobj.name, bytes)
with tarfile.open(fileobj=fobj, mode=self.mode) as tar:
self.assertIsInstance(tar.name, bytes)
self.assertEqual(tar.name, os.path.abspath(fobj.name))
def test_pathlike_name(self, tarname=None):
if tarname is None:
tarname = self.tarname
expected = os.path.abspath(tarname)
tarname = os_helper.FakePath(tarname)
with tarfile.open(tarname, mode=self.mode) as tar:
self.assertEqual(tar.name, expected)
with self.taropen(tarname) as tar:
self.assertEqual(tar.name, expected)
with tarfile.TarFile.open(tarname, mode=self.mode) as tar:
self.assertEqual(tar.name, expected)
if self.suffix == '':
with tarfile.TarFile(tarname, mode='r') as tar:
self.assertEqual(tar.name, expected)
def test_pathlike_bytes_name(self):
self.test_pathlike_name(os.fsencode(self.tarname))
def test_illegal_mode_arg(self):
with open(tmpname, 'wb'):
pass
with self.assertRaisesRegex(ValueError, 'mode must be '):
tar = self.taropen(tmpname, 'q')
with self.assertRaisesRegex(ValueError, 'mode must be '):
tar = self.taropen(tmpname, 'rw')
with self.assertRaisesRegex(ValueError, 'mode must be '):
tar = self.taropen(tmpname, '')
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)
try:
tar.next()
t = tar.next()
name = t.name
offset = t.offset
with tar.extractfile(t) as f:
data = f.read()
finally:
tar.close()
# Open the testtar and seek to the offset of the second member.
with self.open(self.tarname) as fobj:
fobj.seek(offset)
# Test if the tarfile starts with the second member.
with tar.open(self.tarname, mode="r:", fileobj=fobj) as tar:
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")
def test_fail_comp(self):
# For Gzip and Bz2 Tests: fail with a ReadError on an uncompressed file.
self.assertRaises(tarfile.ReadError, tarfile.open, tarname, self.mode)
with open(tarname, "rb") as fobj:
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.assertEqual(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.assertEqual(int(tarinfo.mtime), 0o7606136617,
"wrong mtime for %s" % tarinfo.name)
if not tarinfo.name.startswith("ustar/"):
continue
self.assertEqual(tarinfo.uname, "tarfile",
"wrong uname for %s" % tarinfo.name)
def test_find_members(self):
self.assertEqual(self.tar.getmembers()[-1].name, "misc/eof",
"could not find all members")
@unittest.skipUnless(hasattr(os, "link"),
"Missing hardlink implementation")
@os_helper.skip_unless_symlink
def test_extract_hardlink(self):
# Test hardlink extraction (e.g. bug #857297).
with tarfile.open(tarname, errorlevel=1, encoding="iso8859-1") as tar:
tar.extract("ustar/regtype", TEMPDIR, filter='data')
self.addCleanup(os_helper.unlink, os.path.join(TEMPDIR, "ustar/regtype"))
tar.extract("ustar/lnktype", TEMPDIR, filter='data')
self.addCleanup(os_helper.unlink, os.path.join(TEMPDIR, "ustar/lnktype"))
with open(os.path.join(TEMPDIR, "ustar/lnktype"), "rb") as f:
data = f.read()
self.assertEqual(sha256sum(data), sha256_regtype)
tar.extract("ustar/symtype", TEMPDIR, filter='data')
self.addCleanup(os_helper.unlink, os.path.join(TEMPDIR, "ustar/symtype"))
with open(os.path.join(TEMPDIR, "ustar/symtype"), "rb") as f:
data = f.read()
self.assertEqual(sha256sum(data), sha256_regtype)
@os_helper.skip_unless_working_chmod
def test_extractall(self):
# Test if extractall() correctly restores directory permissions
# and times (see issue1735).
tar = tarfile.open(tarname, encoding="iso8859-1")
DIR = os.path.join(TEMPDIR, "extractall")
os.mkdir(DIR)
try:
directories = [t for t in tar if t.isdir()]
tar.extractall(DIR, directories, filter='fully_trusted')
for tarinfo in directories:
path = os.path.join(DIR, 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,
tarinfo.name)
def format_mtime(mtime):
if isinstance(mtime, float):
return "{} ({})".format(mtime, mtime.hex())
else:
return "{!r} (int)".format(mtime)
file_mtime = os.path.getmtime(path)
errmsg = "tar mtime {0} != file time {1} of path {2!a}".format(
format_mtime(tarinfo.mtime),
format_mtime(file_mtime),
path)
self.assertEqual(tarinfo.mtime, file_mtime, errmsg)
finally:
tar.close()
os_helper.rmtree(DIR)
@staticmethod
def test_extractall_default_filter():
# Test that the default filter is now "data", and the other filter types are not used.
DIR = pathlib.Path(TEMPDIR) / "extractall_default_filter"
with (
os_helper.temp_dir(DIR),
tarfile.open(tarname, encoding="iso8859-1") as tar,
unittest.mock.patch("tarfile.data_filter", wraps=tarfile.data_filter) as mock_data_filter,
unittest.mock.patch("tarfile.tar_filter", wraps=tarfile.tar_filter) as mock_tar_filter,
unittest.mock.patch("tarfile.fully_trusted_filter", wraps=tarfile.fully_trusted_filter) as mock_ft_filter
):
directories = [t for t in tar if t.isdir()]
tar.extractall(DIR, directories)
mock_data_filter.assert_called()
mock_ft_filter.assert_not_called()
mock_tar_filter.assert_not_called()
@os_helper.skip_unless_working_chmod
def test_extract_directory(self):
dirtype = "ustar/dirtype"
DIR = os.path.join(TEMPDIR, "extractdir")
os.mkdir(DIR)
try:
with tarfile.open(tarname, encoding="iso8859-1") as tar:
tarinfo = tar.getmember(dirtype)
tar.extract(tarinfo, path=DIR, filter='fully_trusted')
extracted = os.path.join(DIR, dirtype)
self.assertEqual(os.path.getmtime(extracted), tarinfo.mtime)
if sys.platform != "win32":
self.assertEqual(os.stat(extracted).st_mode & 0o777, 0o755)
finally:
os_helper.rmtree(DIR)
def test_extractall_pathlike_dir(self):
DIR = os.path.join(TEMPDIR, "extractall")
with os_helper.temp_dir(DIR), \
tarfile.open(tarname, encoding="iso8859-1") as tar:
directories = [t for t in tar if t.isdir()]
tar.extractall(os_helper.FakePath(DIR), directories, filter='fully_trusted')
for tarinfo in directories:
path = os.path.join(DIR, tarinfo.name)
self.assertEqual(os.path.getmtime(path), tarinfo.mtime)
def test_extract_pathlike_dir(self):
dirtype = "ustar/dirtype"
DIR = os.path.join(TEMPDIR, "extractall")
with os_helper.temp_dir(DIR), \
tarfile.open(tarname, encoding="iso8859-1") as tar:
tarinfo = tar.getmember(dirtype)
tar.extract(tarinfo, path=os_helper.FakePath(DIR), filter='fully_trusted')
extracted = os.path.join(DIR, dirtype)
self.assertEqual(os.path.getmtime(extracted), tarinfo.mtime)
def test_init_close_fobj(self):
# Issue #7341: Close the internal file object in the TarFile
# constructor in case of an error. For the test we rely on
# the fact that opening an empty file raises a ReadError.
empty = os.path.join(TEMPDIR, "empty")
with open(empty, "wb") as fobj:
fobj.write(b"")
try:
tar = object.__new__(tarfile.TarFile)
try:
tar.__init__(empty)
except tarfile.ReadError:
self.assertTrue(tar.fileobj.closed)
else:
self.fail("ReadError not raised")
finally:
os_helper.unlink(empty)
def test_parallel_iteration(self):
# Issue #16601: Restarting iteration over tarfile continued
# from where it left off.
with tarfile.open(self.tarname) as tar:
for m1, m2 in zip(tar, tar):
self.assertEqual(m1.offset, m2.offset)
self.assertEqual(m1.get_info(), m2.get_info())
@unittest.skipIf(zlib is None, "requires zlib")
def test_zlib_error_does_not_leak(self):
# bpo-39039: tarfile.open allowed zlib exceptions to bubble up when
# parsing certain types of invalid data
with unittest.mock.patch("tarfile.TarInfo.fromtarfile") as mock:
mock.side_effect = zlib.error
with self.assertRaises(tarfile.ReadError):
tarfile.open(self.tarname)
def test_next_on_empty_tarfile(self):
fd = io.BytesIO()
tf = tarfile.open(fileobj=fd, mode="w")
tf.close()
fd.seek(0)
with tarfile.open(fileobj=fd, mode="r|") as tf:
self.assertEqual(tf.next(), None)
fd.seek(0)
with tarfile.open(fileobj=fd, mode="r") as tf:
self.assertEqual(tf.next(), None)
def _setup_symlink_to_target(self, temp_dirpath):
target_filepath = os.path.join(temp_dirpath, "target")
ustar_dirpath = os.path.join(temp_dirpath, "ustar")
hardlink_filepath = os.path.join(ustar_dirpath, "lnktype")
with open(target_filepath, "wb") as f:
f.write(b"target")
os.makedirs(ustar_dirpath)
os.symlink(target_filepath, hardlink_filepath)
return target_filepath, hardlink_filepath
def _assert_on_file_content(self, filepath, digest):
with open(filepath, "rb") as f:
data = f.read()
self.assertEqual(sha256sum(data), digest)
@unittest.skipUnless(
hasattr(os, "link"), "Missing hardlink implementation"
)
@os_helper.skip_unless_symlink
def test_extract_hardlink_on_symlink(self):
"""
This test verifies that extracting a hardlink will not follow an
existing symlink after a FileExistsError on os.link.
"""
with os_helper.temp_dir() as DIR:
target_filepath, hardlink_filepath = self._setup_symlink_to_target(DIR)
with tarfile.open(tarname, encoding="iso8859-1") as tar:
tar.extract("ustar/regtype", DIR, filter="data")
tar.extract("ustar/lnktype", DIR, filter="data")
self._assert_on_file_content(target_filepath, sha256sum(b"target"))
self._assert_on_file_content(hardlink_filepath, sha256_regtype)
@unittest.skipUnless(
hasattr(os, "link"), "Missing hardlink implementation"
)
@os_helper.skip_unless_symlink
def test_extractall_hardlink_on_symlink(self):
"""
This test verifies that extracting a hardlink will not follow an
existing symlink after a FileExistsError on os.link.
"""
with os_helper.temp_dir() as DIR:
target_filepath, hardlink_filepath = self._setup_symlink_to_target(DIR)
with tarfile.open(tarname, encoding="iso8859-1") as tar:
tar.extractall(
DIR, members=["ustar/regtype", "ustar/lnktype"], filter="data",
)
self._assert_on_file_content(target_filepath, sha256sum(b"target"))
self._assert_on_file_content(hardlink_filepath, sha256_regtype)
class MiscReadTest(MiscReadTestBase, unittest.TestCase):
test_fail_comp = None
class GzipMiscReadTest(GzipTest, MiscReadTestBase, unittest.TestCase):
pass
class Bz2MiscReadTest(Bz2Test, MiscReadTestBase, unittest.TestCase):
pass
class LzmaMiscReadTest(LzmaTest, MiscReadTestBase, unittest.TestCase):
pass
class ZstdMiscReadTest(ZstdTest, MiscReadTestBase, unittest.TestCase):
pass
class StreamReadTest(CommonReadTest, unittest.TestCase):
prefix="r|"
is_stream = True
def test_read_through(self):
# Issue #11224: A poorly designed _FileInFile.read() method
# caused seeking errors with stream tar files.
for tarinfo in self.tar:
if not tarinfo.isreg():
continue
with self.tar.extractfile(tarinfo) as fobj:
while True:
try:
buf = fobj.read(512)
except tarfile.StreamError:
self.fail("simple read-through using "
"TarFile.extractfile() failed")
if not buf:
break
def test_fileobj_regular_file(self):
tarinfo = self.tar.next() # get "regtype" (can't use getmember)
with self.tar.extractfile(tarinfo) as fobj:
data = fobj.read()
self.assertEqual(len(data), tarinfo.size,
"regular file extraction failed")
self.assertEqual(sha256sum(data), sha256_regtype,
"regular file extraction failed")
def test_provoke_stream_error(self):
tarinfos = self.tar.getmembers()
with self.tar.extractfile(tarinfos[0]) as f: # read the first member
self.assertRaises(tarfile.StreamError, f.read)
def test_compare_members(self):
tar1 = tarfile.open(tarname, encoding="iso8859-1")
try:
tar2 = self.tar
while True:
t1 = tar1.next()
t2 = tar2.next()
if t1 is None:
break
self.assertIsNotNone(t2, "stream.next() failed.")
if t2.islnk() or t2.issym():
with self.assertRaises(tarfile.StreamError):
tar2.extractfile(t2)
continue
v1 = tar1.extractfile(t1)
v2 = tar2.extractfile(t2)
if v1 is None:
continue
self.assertIsNotNone(v2, "stream.extractfile() failed")
self.assertEqual(v1.read(), v2.read(),
"stream extraction failed")
finally:
tar1.close()
class GzipStreamReadTest(GzipTest, StreamReadTest):
pass
class Bz2StreamReadTest(Bz2Test, StreamReadTest):
pass
class LzmaStreamReadTest(LzmaTest, StreamReadTest):
pass
class ZstdStreamReadTest(ZstdTest, StreamReadTest):
pass
class TarStreamModeReadTest(StreamModeTest, unittest.TestCase):
def test_stream_mode_no_cache(self):
for _ in self.tar:
pass
self.assertEqual(self.tar.members, [])
class GzipStreamModeReadTest(GzipTest, TarStreamModeReadTest):
pass
class Bz2StreamModeReadTest(Bz2Test, TarStreamModeReadTest):
pass
class LzmaStreamModeReadTest(LzmaTest, TarStreamModeReadTest):
pass
class ZstdStreamModeReadTest(ZstdTest, TarStreamModeReadTest):