import sys import os import io import shutil from hashlib import md5 import unittest import tarfile from test import support # Check for our compression modules. try: import gzip except ImportError: gzip = None try: import bz2 except ImportError: bz2 = None try: import lzma except ImportError: lzma = None def md5sum(data): return md5(data).hexdigest() TEMPDIR = os.path.abspath(support.TESTFN) + "-tardir" tarname = support.findfile("testtar.tar") gzipname = os.path.join(TEMPDIR, "testtar.tar.gz") bz2name = os.path.join(TEMPDIR, "testtar.tar.bz2") xzname = os.path.join(TEMPDIR, "testtar.tar.xz") tmpname = os.path.join(TEMPDIR, "tmp.tar") md5_regtype = "65f477c818ad9e15f7feab0c6d37742f" md5_sparse = "a54fbc4ca4f4399a90e1b27164012fc6" class TarTest: tarname = tarname suffix = '' open = io.FileIO @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 @support.requires_bz2 class Bz2Test: tarname = bz2name suffix = 'bz2' open = bz2.BZ2File if bz2 else None @support.requires_lzma class LzmaTest: tarname = xzname suffix = 'xz' open = lzma.LZMAFile if lzma else None 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 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(md5sum(data), md5_regtype, "regular file extraction failed") def test_fileobj_readlines(self): self.tar.extract("ustar/regtype", TEMPDIR) 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) 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) with open(os.path.join(TEMPDIR, "ustar/regtype"), "rb") as fobj: data = fobj.read() 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.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") fobj.close() 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(md5sum(data), md5_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") class GzipUstarReadTest(GzipTest, UstarReadTest): pass class Bz2UstarReadTest(Bz2Test, UstarReadTest): pass class LzmaUstarReadTest(LzmaTest, UstarReadTest): pass class CommonReadTest(ReadTest): 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_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. 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) fobj.write(tarfile.TarInfo("foo").tobuf()) 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() class MiscReadTestBase(CommonReadTest): def test_no_name_argument(self): with open(self.tarname, "rb") as fobj: tar = tarfile.open(fileobj=fobj, mode=self.mode) 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.assertEqual(tar.name, None) 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.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) 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. 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. 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") @support.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) self.addCleanup(os.remove, os.path.join(TEMPDIR, "ustar/regtype")) tar.extract("ustar/lnktype", TEMPDIR) self.addCleanup(os.remove, os.path.join(TEMPDIR, "ustar/lnktype")) with open(os.path.join(TEMPDIR, "ustar/lnktype"), "rb") as f: data = f.read() self.assertEqual(md5sum(data), md5_regtype) tar.extract("ustar/symtype", TEMPDIR) self.addCleanup(os.remove, os.path.join(TEMPDIR, "ustar/symtype")) with open(os.path.join(TEMPDIR, "ustar/symtype"), "rb") as f: data = f.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") DIR = os.path.join(TEMPDIR, "extractall") os.mkdir(DIR) try: directories = [t for t in tar if t.isdir()] tar.extractall(DIR, directories) 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) 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() shutil.rmtree(DIR) 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) 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: shutil.rmtree(DIR) 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: support.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()) class MiscReadTest(MiscReadTestBase, unittest.TestCase): test_fail_comp = None class GzipMiscReadTest(GzipTest, MiscReadTestBase, unittest.TestCase): def test_non_existent_targz_file(self): # Test for issue11513: prevent non-existent gzipped tarfiles raising # multiple exceptions. with self.assertRaisesRegex(FileNotFoundError, "xxx"): tarfile.open("xxx", self.mode) class Bz2MiscReadTest(Bz2Test, MiscReadTestBase, unittest.TestCase): def test_no_name_argument(self): self.skipTest("BZ2File have no name attribute") class LzmaMiscReadTest(LzmaTest, MiscReadTestBase, unittest.TestCase): def test_no_name_argument(self): self.skipTest("LZMAFile have no name attribute") class StreamReadTest(CommonReadTest, unittest.TestCase): prefix="r|" 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(md5sum(data), md5_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 DetectReadTest(TarTest, unittest.TestCase): def _testfunc_file(self, name, mode): try: tar = tarfile.open(name, mode) except tarfile.ReadError as e: self.fail() else: tar.close() def _testfunc_fileobj(self, name, mode): try: with open(name, "rb") as f: tar = tarfile.open(name, mode, fileobj=f) except tarfile.ReadError as e: self.fail() else: tar.close() def _test_modes(self, testfunc): if self.suffix: with self.assertRaises(tarfile.ReadError): tarfile.open(tarname, mode="r:" + self.suffix) with self.assertRaises(tarfile.ReadError): tarfile.open(tarname, mode="r|" + self.suffix) with self.assertRaises(tarfile.ReadError): tarfile.open(self.tarname, mode="r:") with self.assertRaises(tarfile.ReadError): tarfile.open(self.tarname, mode="r|") testfunc(self.tarname, "r") testfunc(self.tarname, "r:" + self.suffix) testfunc(self.tarname, "r:*") testfunc(self.tarname, "r|" + self.suffix) testfunc(self.tarname, "r|*") def test_detect_file(self): self._test_modes(self._testfunc_file) def test_detect_fileobj(self): self._test_modes(self._testfunc_fileobj) class GzipDetectReadTest(GzipTest, DetectReadTest): pass class Bz2DetectReadTest(Bz2Test, DetectReadTest): def test_detect_stream_bz2(self): # Originally, tarfile's stream detection looked for the string # "BZh91" at the start of the file. This is incorrect because # the '9' represents the blocksize (900kB). If the file was # compressed using another blocksize autodetection fails. with open(tarname, "rb") as fobj: data = fobj.read() # Compress with blocksize 100kB, the file starts with "BZh11". with bz2.BZ2File(tmpname, "wb", compresslevel=1) as fobj: fobj.write(data) self._testfunc_file(tmpname, "r|*") class LzmaDetectReadTest(LzmaTest, DetectReadTest): pass class MemberReadTest(ReadTest, unittest.TestCase): def _test_member(self, tarinfo, chksum=None, **kwargs): if chksum is not None: with self.tar.extractfile(tarinfo) as f: self.assertEqual(md5sum(f.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.assertEqual(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_gnusparse(self): tarinfo = self.tar.getmember("gnu/sparse") self._test_member(tarinfo, size=86016, chksum=md5_sparse) def test_find_gnusparse_00(self): tarinfo = self.tar.getmember("gnu/sparse-0.0") self._test_member(tarinfo, size=86016, chksum=md5_sparse) def test_find_gnusparse_01(self): tarinfo = self.tar.getmember("gnu/sparse-0.1") self._test_member(tarinfo, size=86016, chksum=md5_sparse) def test_find_gnusparse_10(self): tarinfo = self.tar.getmember("gnu/sparse-1.0") 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.assertIn(name, 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.close() 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: 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.assertNotEqual(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.assertEqual(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)) with 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 with open(tarname, "rb") as fobj: fobj.seek(offset) tarinfo = tarfile.TarInfo.frombuf(fobj.read(512), "iso8859-1", "strict") self.assertEqual(tarinfo.type, self.longnametype) class GNUReadTest(LongnameTest, ReadTest, unittest.TestCase): subdir = "gnu" longnametype = tarfile.GNUTYPE_LONGNAME # Since 3.2 tarfile is supposed to accurately restore sparse members and # produce files with holes. This is what we actually want to test here. # Unfortunately, not all platforms/filesystems support sparse files, and # even on platforms that do it is non-trivial to make reliable assertions # about holes in files. Therefore, we first do one basic test which works # an all platforms, and after that a test that will work only on # platforms/filesystems that prove to support sparse files. def _test_sparse_file(self, name): self.tar.extract(name, TEMPDIR) filename = os.path.join(TEMPDIR, name) with open(filename, "rb") as fobj: data = fobj.read() self.assertEqual(md5sum(data), md5_sparse, "wrong md5sum for %s" % name) if self._fs_supports_holes(): s = os.stat(filename) self.assertLess(s.st_blocks * 512, s.st_size) def test_sparse_file_old(self): self._test_sparse_file("gnu/sparse") def test_sparse_file_00(self): self._test_sparse_file("gnu/sparse-0.0") def test_sparse_file_01(self): self._test_sparse_file("gnu/sparse-0.1") def test_sparse_file_10(self): self._test_sparse_file("gnu/sparse-1.0") @staticmethod def _fs_supports_holes(): # Return True if the platform knows the st_blocks stat attribute and # uses st_blocks units of 512 bytes, and if the filesystem is able to # store holes in files. if sys.platform.startswith("linux"): # Linux evidentially has 512 byte st_blocks units. name = os.path.join(TEMPDIR, "sparse-test") with open(name, "wb") as fobj: fobj.seek(4096) fobj.truncate() s = os.stat(name) os.remove(name) return s.st_blocks == 0 else: return False class PaxReadTest(LongnameTest, ReadTest, unittest.TestCase): subdir = "pax" longnametype = tarfile.XHDTYPE def test_pax_global_headers(self): tar = tarfile.open(tarname, encoding="iso8859-1") try: 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") finally: tar.close() def test_pax_number_fields(self): # All following number fields are read from the pax header. tar = tarfile.open(tarname, encoding="iso8859-1") try: 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) finally: tar.close() class WriteTestBase(TarTest): # 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.assertFalse(fobj.closed, "external fileobjs must never closed") class WriteTest(WriteTestBase, unittest.TestCase): prefix = "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) try: t = tarfile.TarInfo(name) tar.addfile(t) finally: tar.close() tar = tarfile.open(tmpname) try: self.assertEqual(tar.getnames()[0], name, "failed to store 100 char filename") finally: tar.close() def test_tar_size(self): # Test for bug #1013882. tar = tarfile.open(tmpname, self.mode) try: path = os.path.join(TEMPDIR, "file") with open(path, "wb") as fobj: fobj.write(b"aaa") tar.add(path) finally: tar.close() self.assertGreater(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) try: path = os.path.join(TEMPDIR, "file") with open(path, "wb"): pass tarinfo = tar.gettarinfo(path) self.assertEqual(tarinfo.size, 0) with open(path, "wb") as fobj: fobj.write(b"aaa") tarinfo = tar.gettarinfo(path) self.assertEqual(tarinfo.size, 3) finally: tar.close() def test_directory_size(self): path = os.path.join(TEMPDIR, "directory") os.mkdir(path) try: tar = tarfile.open(tmpname, self.mode) try: tarinfo = tar.gettarinfo(path) self.assertEqual(tarinfo.size, 0) finally: tar.close() finally: os.rmdir(path) @unittest.skipUnless(hasattr(os, "link"), "Missing hardlink implementation") def test_link_size(self): link = os.path.join(TEMPDIR, "link") target = os.path.join(TEMPDIR, "link_target") with open(target, "wb") as fobj: fobj.write(b"aaa") os.link(target, link) try: tar = tarfile.open(tmpname, self.mode) try: # Record the link target in the inodes list. tar.gettarinfo(target) tarinfo = tar.gettarinfo(link) self.assertEqual(tarinfo.size, 0) finally: tar.close() finally: os.remove(target) os.remove(link) @support.skip_unless_symlink def test_symlink_size(self): path = os.path.join(TEMPDIR, "symlink") os.symlink("link_target", path) try: tar = tarfile.open(tmpname, self.mode) try: tarinfo = tar.gettarinfo(path) self.assertEqual(tarinfo.size, 0) finally: tar.close() finally: os.remove(path) def test_add_self(self): # Test for #1257255. dstname = os.path.abspath(tmpname) tar = tarfile.open(tmpname, self.mode) try: self.assertEqual(tar.name, dstname, "archive name must be absolute") tar.add(dstname) self.assertEqual(tar.getnames(), [], "added the archive to itself") cwd = os.getcwd() os.chdir(TEMPDIR) tar.add(dstname) os.chdir(cwd) self.assertEqual(tar.getnames(), [], "added the archive to itself") finally: tar.close() 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) support.create_empty_file(name) exclude = os.path.isfile tar = tarfile.open(tmpname, self.mode, encoding="iso8859-1") try: with support.check_warnings(("use the filter argument", DeprecationWarning)): tar.add(tempdir, arcname="empty_dir", exclude=exclude) finally: tar.close() tar = tarfile.open(tmpname, "r") try: self.assertEqual(len(tar.getmembers()), 1) self.assertEqual(tar.getnames()[0], "empty_dir") finally: tar.close() finally: shutil.rmtree(tempdir) def test_filter(self): tempdir = os.path.join(TEMPDIR, "filter") os.mkdir(tempdir) try: for name in ("foo", "bar", "baz"): name = os.path.join(tempdir, name) support.create_empty_file(name) def filter(tarinfo): if os.path.basename(tarinfo.name) == "bar": return tarinfo.uid = 123 tarinfo.uname = "foo" return tarinfo tar = tarfile.open(tmpname, self.mode, encoding="iso8859-1") try: tar.add(tempdir, arcname="empty_dir", filter=filter) finally: tar.close() # Verify that filter is a keyword-only argument with self.assertRaises(TypeError): tar.add(tempdir, "empty_dir", True, None, filter) tar = tarfile.open(tmpname, "r") try: for tarinfo in tar: self.assertEqual(tarinfo.uid, 123) self.assertEqual(tarinfo.uname, "foo") self.assertEqual(len(tar.getmembers()), 3) finally: tar.close() finally: shutil.rmtree(tempdir) # Guarantee that stored pathnames are not modified. Don't # remove ./ or ../ or double slashes. Still make absolute # pathnames relative. # For details see bug #6054. def _test_pathname(self, path, cmp_path=None, dir=False): # Create a tarfile with an empty member named path # and compare the stored name with the original. foo = os.path.join(TEMPDIR, "foo") if not dir: support.create_empty_file(foo) else: os.mkdir(foo) tar = tarfile.open(tmpname, self.mode) try: tar.add(foo, arcname=path) finally: tar.close() tar = tarfile.open(tmpname, "r") try: t = tar.next() finally: tar.close() if not dir: os.remove(foo) else: os.rmdir(foo) self.assertEqual(t.name, cmp_path or path.replace(os.sep, "/")) @support.skip_unless_symlink def test_extractall_symlinks(self): # Test if extractall works properly when tarfile contains symlinks tempdir = os.path.join(TEMPDIR, "testsymlinks") temparchive = os.path.join(TEMPDIR, "testsymlinks.tar") os.mkdir(tempdir) try: source_file = os.path.join(tempdir,'source') target_file = os.path.join(tempdir,'symlink') with open(source_file,'w') as f: f.write('something\n') os.symlink(source_file, target_file) tar = tarfile.open(temparchive,'w') tar.add(source_file) tar.add(target_file) tar.close() # Let's extract it to the location which contains the symlink tar = tarfile.open(temparchive,'r') # this should not raise OSError: [Errno 17] File exists try: tar.extractall(path=tempdir) except OSError: self.fail("extractall failed with symlinked files") finally: tar.close() finally: os.unlink(temparchive) shutil.rmtree(tempdir) def test_pathnames(self): self._test_pathname("foo") self._test_pathname(os.path.join("foo", ".", "bar")) self._test_pathname(os.path.join("foo", "..", "bar")) self._test_pathname(os.path.join(".", "foo")) self._test_pathname(os.path.join(".", "foo", ".")) self._test_pathname(os.path.join(".", "foo", ".", "bar")) self._test_pathname(os.path.join(".", "foo", "..", "bar")) self._test_pathname(os.path.join(".", "foo", "..", "bar")) self._test_pathname(os.path.join("..", "foo")) self._test_pathname(os.path.join("..", "foo", "..")) self._test_pathname(os.path.join("..", "foo", ".", "bar")) self._test_pathname(os.path.join("..", "foo", "..", "bar")) self._test_pathname("foo" + os.sep + os.sep + "bar") self._test_pathname("foo" + os.sep + os.sep, "foo", dir=True) def test_abs_pathnames(self): if sys.platform == "win32": self._test_pathname("C:\\foo", "foo") else: self._test_pathname("/foo", "foo") self._test_pathname("///foo", "foo") def test_cwd(self): # Test adding the current working directory. cwd = os.getcwd() os.chdir(TEMPDIR) try: tar = tarfile.open(tmpname, self.mode) try: tar.add(".") finally: tar.close() tar = tarfile.open(tmpname, "r") try: for t in tar: if t.name != ".": self.assertTrue(t.name.startswith("./"), t.name) finally: tar.close() finally: os.chdir(cwd) class GzipWriteTest(GzipTest, WriteTest): pass class Bz2WriteTest(Bz2Test, WriteTest): pass class LzmaWriteTest(LzmaTest, WriteTest): pass class StreamWriteTest(WriteTestBase, unittest.TestCase): prefix = "w|" decompressor = None def test_stream_padding(self): # Test for bug #1543303. tar = tarfile.open(tmpname, self.mode) tar.close() if self.decompressor: dec = self.decompressor() with open(tmpname, "rb") as fobj: data = fobj.read() data = dec.decompress(data) self.assertFalse(dec.unused_data, "found trailing data") else: with self.open(tmpname) as fobj: data = fobj.read() self.assertEqual(data.count(b"\0"), tarfile.RECORDSIZE, "incorrect zero padding") @unittest.skipUnless(sys.platform != "win32" and hasattr(os, "umask"), "Missing umask implementation") def test_file_mode(self): # Test for issue #8464: Create files with correct # permissions. if os.path.exists(tmpname): os.remove(tmpname) original_umask = os.umask(0o022) try: tar = tarfile.open(tmpname, self.mode) tar.close() mode = os.stat(tmpname).st_mode & 0o777 self.assertEqual(mode, 0o644, "wrong file permissions") finally: os.umask(original_umask) class GzipStreamWriteTest(GzipTest, StreamWriteTest): pass class Bz2StreamWriteTest(Bz2Test, StreamWriteTest): decompressor = bz2.BZ2Decompressor if bz2 else None class LzmaStreamWriteTest(LzmaTest, StreamWriteTest): decompressor = lzma.LZMADecompressor if lzma else None 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 = len(s) // 512 + 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") try: tar.format = tarfile.GNU_FORMAT tar.addfile(tarinfo) v1 = self._calc_size(name, link) v2 = tar.offset self.assertEqual(v1, v2, "GNU longname/longlink creation failed") finally: tar.close() tar = tarfile.open(tmpname) try: member = tar.next() self.assertIsNotNone(member, "unable to read longname member") self.assertEqual(tarinfo.name, member.name, "unable to read longname member") self.assertEqual(tarinfo.linkname, member.linkname, "unable to read longname member") finally: tar.close() 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_") @unittest.skipUnless(hasattr(os, "link"), "Missing hardlink implementation") 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") with open(self.foo, "wb") as fobj: fobj.write(b"foo") os.link(self.foo, self.bar) self.tar = tarfile.open(tmpname, "w") self.tar.add(self.foo) def tearDown(self): self.tar.close() support.unlink(self.foo) support.unlink(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.assertEqual(tarinfo.type, tarfile.REGTYPE, "add file as regular failed") def test_add_hardlink(self): tarinfo = self.tar.gettarinfo(self.bar) self.assertEqual(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.assertEqual(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) try: tar.addfile(tarinfo) finally: tar.close() tar = tarfile.open(tmpname) try: if link: l = tar.getmembers()[0].linkname self.assertEqual(link, l, "PAX longlink creation failed") else: n = tar.getmembers()[0].name self.assertEqual(name, n, "PAX longname creation failed") finally: tar.close() 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) try: tar.addfile(tarfile.TarInfo("test")) finally: tar.close() # Test if the global header was written correctly. tar = tarfile.open(tmpname, encoding="iso8859-1") try: 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.assertIsNot(type(key), bytes) self.assertIsNot(type(val), 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") finally: tar.close() 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") try: t = tarfile.TarInfo() t.name = "\xe4\xf6\xfc" # non-ASCII t.uid = 8**8 # too large t.pax_headers = pax_headers tar.addfile(t) finally: tar.close() tar = tarfile.open(tmpname, encoding="iso8859-1") try: t = tar.getmembers()[0] self.assertEqual(t.pax_headers, pax_headers) self.assertEqual(t.name, "foo") self.assertEqual(t.uid, 123) finally: tar.close() 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("utf-8") def _test_unicode_filename(self, encoding): tar = tarfile.open(tmpname, "w", format=self.format, encoding=encoding, errors="strict") try: name = "\xe4\xf6\xfc" tar.addfile(tarfile.TarInfo(name)) finally: tar.close() tar = tarfile.open(tmpname, encoding=encoding) try: self.assertEqual(tar.getmembers()[0].name, name) finally: tar.close() def test_unicode_filename_error(self): tar = tarfile.open(tmpname, "w", format=self.format, encoding="ascii", errors="strict") try: 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) finally: tar.close() def test_unicode_argument(self): tar = tarfile.open(tarname, "r", encoding="iso8859-1", errors="strict") try: for t in tar: self.assertIs(type(t.name), str) self.assertIs(type(t.linkname), str) self.assertIs(type(t.uname), str) self.assertIs(type(t.gname), str) finally: 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") try: tar.addfile(t) finally: tar.close() tar = tarfile.open(tmpname, encoding="iso8859-1") try: 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.close() tar = tarfile.open(tmpname, encoding="ascii") t = tar.getmember("foo") self.assertEqual(t.uname, "\udce4\udcf6\udcfc") self.assertEqual(t.gname, "\udce4\udcf6\udcfc") finally: tar.close() class GNUUnicodeTest(UstarUnicodeTest): format = tarfile.GNU_FORMAT def test_bad_pax_header(self): # Test for issue #8633. GNU tar <= 1.23 creates raw binary fields # without a hdrcharset=BINARY header. for encoding, name in ( ("utf-8", "pax/bad-pax-\udce4\udcf6\udcfc"), ("iso8859-1", "pax/bad-pax-\xe4\xf6\xfc"),): with tarfile.open(tarname, encoding=encoding, errors="surrogateescape") as tar: try: t = tar.getmember(name) except KeyError: self.fail("unable to read bad GNU tar pax header") class PAXUnicodeTest(UstarUnicodeTest): format = tarfile.PAX_FORMAT # PAX_FORMAT ignores encoding in write mode. test_unicode_filename_error = None def test_binary_header(self): # Test a POSIX.1-2008 compatible header with a hdrcharset=BINARY field. for encoding, name in ( ("utf-8", "pax/hdrcharset-\udce4\udcf6\udcfc"), ("iso8859-1", "pax/hdrcharset-\xe4\xf6\xfc"),): with tarfile.open(tarname, encoding=encoding, errors="surrogateescape") as tar: try: t = tar.getmember(name) except KeyError: self.fail("unable to read POSIX.1-2008 binary header") class AppendTestBase: # Test append mode (cp. patch #1652681). def setUp(self): self.tarname = tmpname if os.path.exists(self.tarname): os.remove(self.tarname) def _create_testtar(self, mode="w:"): with tarfile.open(tarname, encoding="iso8859-1") as src: t = src.getmember("ustar/regtype") t.name = "foo" with src.extractfile(t) as f: with tarfile.open(self.tarname, mode) as tar: tar.addfile(t, f) def test_append_compressed(self): self._create_testtar("w:" + self.suffix) self.assertRaises(tarfile.ReadError, tarfile.open, tmpname, "a") class AppendTest(AppendTestBase, unittest.TestCase): test_append_compressed = None def _add_testfile(self, fileobj=None): with tarfile.open(self.tarname, "a", fileobj=fileobj) as tar: tar.addfile(tarfile.TarInfo("bar")) def _test(self, names=["bar"], fileobj=None): with tarfile.open(self.tarname, fileobj=fileobj) as tar: self.assertEqual(tar.getnames(), names) def test_non_existing(self): self._add_testfile() self._test() def test_empty(self): tarfile.open(self.tarname, "w:").close() self._add_testfile() self._test() def test_empty_fileobj(self): fobj = io.BytesIO(b"\0" * 1024) self._add_testfile(fobj) fobj.seek(0) self._test(fileobj=fobj) def test_fileobj(self): self._create_testtar() with open(self.tarname, "rb") as fobj: data = fobj.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"]) # Append mode is supposed to fail if the tarfile to append to # does not end with a zero block. def _test_error(self, data): with open(self.tarname, "wb") as fobj: fobj.write(data) self.assertRaises(tarfile.ReadError, self._add_testfile) def test_null(self): self._test_error(b"") def test_incomplete(self): self._test_error(b"\0" * 13) def test_premature_eof(self): data = tarfile.TarInfo("foo").tobuf() self._test_error(data) def test_trailing_garbage(self): data = tarfile.TarInfo("foo").tobuf() self._test_error(data + b"\0" * 13) def test_invalid(self): self._test_error(b"a" * 512) class GzipAppendTest(GzipTest, AppendTestBase, unittest.TestCase): pass class Bz2AppendTest(Bz2Test, AppendTestBase, unittest.TestCase): pass class LzmaAppendTest(LzmaTest, AppendTestBase, unittest.TestCase): pass 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_read_number_fields(self): # Issue 13158: Test if GNU tar specific base-256 number fields # are decoded correctly. self.assertEqual(tarfile.nti(b"0000001\x00"), 1) self.assertEqual(tarfile.nti(b"7777777\x00"), 0o7777777) self.assertEqual(tarfile.nti(b"\x80\x00\x00\x00\x00\x20\x00\x00"), 0o10000000) self.assertEqual(tarfile.nti(b"\x80\x00\x00\x00\xff\xff\xff\xff"), 0xffffffff) self.assertEqual(tarfile.nti(b"\xff\xff\xff\xff\xff\xff\xff\xff"), -1) self.assertEqual(tarfile.nti(b"\xff\xff\xff\xff\xff\xff\xff\x9c"), -100) self.assertEqual(tarfile.nti(b"\xff\x00\x00\x00\x00\x00\x00\x00"), -0x100000000000000) def test_write_number_fields(self): self.assertEqual(tarfile.itn(1), b"0000001\x00") self.assertEqual(tarfile.itn(0o7777777), b"7777777\x00") self.assertEqual(tarfile.itn(0o10000000), b"\x80\x00\x00\x00\x00\x20\x00\x00") self.assertEqual(tarfile.itn(0xffffffff), b"\x80\x00\x00\x00\xff\xff\xff\xff") self.assertEqual(tarfile.itn(-1), b"\xff\xff\xff\xff\xff\xff\xff\xff") self.assertEqual(tarfile.itn(-100), b"\xff\xff\xff\xff\xff\xff\xff\x9c") self.assertEqual(tarfile.itn(-0x100000000000000), b"\xff\x00\x00\x00\x00\x00\x00\x00") def test_number_field_limits(self): with self.assertRaises(ValueError): tarfile.itn(-1, 8, tarfile.USTAR_FORMAT) with self.assertRaises(ValueError): tarfile.itn(0o10000000, 8, tarfile.USTAR_FORMAT) with self.assertRaises(ValueError): tarfile.itn(-0x10000000001, 6, tarfile.GNU_FORMAT) with self.assertRaises(ValueError): tarfile.itn(0x10000000000, 6, tarfile.GNU_FORMAT) class ContextManagerTest(unittest.TestCase): def test_basic(self): with tarfile.open(tarname) as tar: self.assertFalse(tar.closed, "closed inside runtime context") self.assertTrue(tar.closed, "context manager failed") def test_closed(self): # The __enter__() method is supposed to raise OSError # if the TarFile object is already closed. tar = tarfile.open(tarname) tar.close() with self.assertRaises(OSError): with tar: pass def test_exception(self): # Test if the OSError exception is passed through properly. with self.assertRaises(Exception) as exc: with tarfile.open(tarname) as tar: raise OSError self.assertIsInstance(exc.exception, OSError, "wrong exception raised in context manager") self.assertTrue(tar.closed, "context manager failed") def test_no_eof(self): # __exit__() must not write end-of-archive blocks if an # exception was raised. try: with tarfile.open(tmpname, "w") as tar: raise Exception except: pass self.assertEqual(os.path.getsize(tmpname), 0, "context manager wrote an end-of-archive block") self.assertTrue(tar.closed, "context manager failed") def test_eof(self): # __exit__() must write end-of-archive blocks, i.e. call # TarFile.close() if there was no error. with tarfile.open(tmpname, "w"): pass self.assertNotEqual(os.path.getsize(tmpname), 0, "context manager wrote no end-of-archive block") def test_fileobj(self): # Test that __exit__() did not close the external file # object. with open(tmpname, "wb") as fobj: try: with tarfile.open(fileobj=fobj, mode="w") as tar: raise Exception except: pass self.assertFalse(fobj.closed, "external file object was closed") self.assertTrue(tar.closed, "context manager failed") @unittest.skipIf(hasattr(os, "link"), "requires os.link to be missing") class LinkEmulationTest(ReadTest, unittest.TestCase): # Test for issue #8741 regression. On platforms that do not support # symbolic or hard links tarfile tries to extract these types of members # as the regular files they point to. def _test_link_extraction(self, name): self.tar.extract(name, TEMPDIR) with open(os.path.join(TEMPDIR, name), "rb") as f: data = f.read() self.assertEqual(md5sum(data), md5_regtype) # See issues #1578269, #8879, and #17689 for some history on these skips @unittest.skipIf(hasattr(os.path, "islink"), "Skip emulation - has os.path.islink but not os.link") def test_hardlink_extraction1(self): self._test_link_extraction("ustar/lnktype") @unittest.skipIf(hasattr(os.path, "islink"), "Skip emulation - has os.path.islink but not os.link") def test_hardlink_extraction2(self): self._test_link_extraction("./ustar/linktest2/lnktype") @unittest.skipIf(hasattr(os, "symlink"), "Skip emulation if symlink exists") def test_symlink_extraction1(self): self._test_link_extraction("ustar/symtype") @unittest.skipIf(hasattr(os, "symlink"), "Skip emulation if symlink exists") def test_symlink_extraction2(self): self._test_link_extraction("./ustar/linktest2/symtype") class Bz2PartialReadTest(Bz2Test, 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) def seek(self, *args): self.hit_eof = False return super(MyBytesIO, self).seek(*args) data = bz2.compress(tarfile.TarInfo("foo").tobuf()) for x in range(len(data) + 1): try: tarfile.open(fileobj=MyBytesIO(data[:x]), mode=mode) except tarfile.ReadError: pass # we have no interest in ReadErrors def test_partial_input(self): self._test_partial_input("r") def test_partial_input_bz2(self): self._test_partial_input("r:bz2") def setUpModule(): support.unlink(TEMPDIR) os.makedirs(TEMPDIR) with open(tarname, "rb") as fobj: data = fobj.read() # Create compressed tarfiles. for c in GzipTest, Bz2Test, LzmaTest: if c.open: support.unlink(c.tarname) with c.open(c.tarname, "wb") as tar: tar.write(data) def tearDownModule(): if os.path.exists(TEMPDIR): shutil.rmtree(TEMPDIR) if __name__ == "__main__": unittest.main()