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//usr/lib/python2.4/test/test_tarfile.py
import sys import os import shutil import tempfile import StringIO import unittest import tarfile from test import test_support # Check for our compression modules. try: import gzip gzip.GzipFile except (ImportError, AttributeError): gzip = None try: import bz2 except ImportError: bz2 = None def path(path): return test_support.findfile(path) testtar = path("testtar.tar") tempdir = os.path.join(tempfile.gettempdir(), "testtar" + os.extsep + "dir") tempname = test_support.TESTFN membercount = 13 def tarname(comp=""): if not comp: return testtar return os.path.join(tempdir, "%s%s%s" % (testtar, os.extsep, comp)) def dirname(): if not os.path.exists(tempdir): os.mkdir(tempdir) return tempdir def tmpname(): return tempname class BaseTest(unittest.TestCase): comp = '' mode = 'r' sep = ':' def setUp(self): mode = self.mode + self.sep + self.comp self.tar = tarfile.open(tarname(self.comp), mode) def tearDown(self): self.tar.close() class ReadTest(BaseTest): def test(self): """Test member extraction. """ members = 0 for tarinfo in self.tar: members += 1 if not tarinfo.isreg(): continue f = self.tar.extractfile(tarinfo) self.assert_(len(f.read()) == tarinfo.size, "size read does not match expected size") f.close() self.assert_(members == membercount, "could not find all members") def test_sparse(self): """Test sparse member extraction. """ if self.sep != "|": f1 = self.tar.extractfile("S-SPARSE") f2 = self.tar.extractfile("S-SPARSE-WITH-NULLS") self.assert_(f1.read() == f2.read(), "_FileObject failed on sparse file member") def test_readlines(self): """Test readlines() method of _FileObject. """ if self.sep != "|": filename = "0-REGTYPE-TEXT" self.tar.extract(filename, dirname()) f = open(os.path.join(dirname(), filename), "rU") lines1 = f.readlines() f.close() lines2 = self.tar.extractfile(filename).readlines() self.assert_(lines1 == lines2, "_FileObject.readline() does not work correctly") def test_iter(self): # Test iteration over ExFileObject. if self.sep != "|": filename = "0-REGTYPE-TEXT" self.tar.extract(filename, dirname()) f = open(os.path.join(dirname(), filename), "rU") lines1 = f.readlines() f.close() lines2 = [line for line in self.tar.extractfile(filename)] self.assert_(lines1 == lines2, "ExFileObject iteration does not work correctly") def test_seek(self): """Test seek() method of _FileObject, incl. random reading. """ if self.sep != "|": filename = "0-REGTYPE-TEXT" self.tar.extract(filename, dirname()) f = open(os.path.join(dirname(), filename), "rb") data = f.read() f.close() tarinfo = self.tar.getmember(filename) fobj = self.tar.extractfile(tarinfo) text = fobj.read() fobj.seek(0) self.assert_(0 == fobj.tell(), "seek() to file's start failed") fobj.seek(2048, 0) self.assert_(2048 == fobj.tell(), "seek() to absolute position failed") fobj.seek(-1024, 1) self.assert_(1024 == fobj.tell(), "seek() to negative relative position failed") fobj.seek(1024, 1) self.assert_(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.assert_(tarinfo.size == fobj.tell(), "seek() to file's end failed") self.assert_(fobj.read() == "", "read() at file's end did not return empty string") fobj.seek(-tarinfo.size, 2) self.assert_(0 == fobj.tell(), "relative seek() to file's start 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.assert_(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.assert_(fobj.read() == data[len(line):], "read() after readline() failed") fobj.close() def test_old_dirtype(self): """Test old style dirtype member (bug #1336623). """ # Old tars create directory members using a REGTYPE # header with a "/" appended to the filename field. # Create an old tar style directory entry. filename = tmpname() tarinfo = tarfile.TarInfo("directory/") tarinfo.type = tarfile.REGTYPE fobj = open(filename, "w") fobj.write(tarinfo.tobuf()) fobj.close() try: # Test if it is still a directory entry when # read back. tar = tarfile.open(filename) tarinfo = tar.getmembers()[0] tar.close() self.assert_(tarinfo.type == tarfile.DIRTYPE) self.assert_(tarinfo.name.endswith("/")) finally: try: os.unlink(filename) except: pass def test_dirtype(self): for tarinfo in self.tar: if tarinfo.isdir(): self.assert_(tarinfo.name.endswith("/")) self.assert_(not tarinfo.name[:-1].endswith("/")) def test_extractall(self): # Test if extractall() correctly restores directory permissions # and times (see issue1735). if sys.platform == "win32": # Win32 has no support for utime() on directories or # fine grained permissions. return fobj = StringIO.StringIO() tar = tarfile.open(fileobj=fobj, mode="w:") for name in ("foo", "foo/bar"): tarinfo = tarfile.TarInfo(name) tarinfo.type = tarfile.DIRTYPE tarinfo.mtime = 07606136617 tarinfo.mode = 0755 tar.addfile(tarinfo) tar.close() fobj.seek(0) TEMPDIR = os.path.join(dirname(), "extract-test") tar = tarfile.open(fileobj=fobj) tar.extractall(TEMPDIR) for tarinfo in tar.getmembers(): path = os.path.join(TEMPDIR, tarinfo.name) self.assertEqual(tarinfo.mode, os.stat(path).st_mode & 0777) self.assertEqual(tarinfo.mtime, os.path.getmtime(path)) tar.close() def test_star(self): try: self.tar.getmember("7-STAR") except KeyError: self.fail("finding 7-STAR member failed (mangled prefix?)") class ReadStreamTest(ReadTest): sep = "|" def test(self): """Test member extraction, and for StreamError when seeking backwards. """ ReadTest.test(self) tarinfo = self.tar.getmembers()[0] f = self.tar.extractfile(tarinfo) self.assertRaises(tarfile.StreamError, f.read) def test_stream(self): """Compare the normal tar and the stream tar. """ stream = self.tar tar = tarfile.open(tarname(), 'r') while 1: t1 = tar.next() t2 = stream.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, stream.extractfile, t2) continue v1 = tar.extractfile(t1) v2 = stream.extractfile(t2) if v1 is None: continue self.assert_(v2 is not None, "stream.extractfile() failed") self.assert_(v1.read() == v2.read(), "stream extraction failed") tar.close() stream.close() class ReadDetectTest(ReadTest): def setUp(self): self.tar = tarfile.open(tarname(self.comp), self.mode) class ReadDetectFileobjTest(ReadTest): def setUp(self): name = tarname(self.comp) self.tar = tarfile.open(name, mode=self.mode, fileobj=open(name, "rb")) class ReadAsteriskTest(ReadTest): def setUp(self): mode = self.mode + self.sep + "*" self.tar = tarfile.open(tarname(self.comp), mode) class ReadStreamAsteriskTest(ReadStreamTest): def setUp(self): mode = self.mode + self.sep + "*" self.tar = tarfile.open(tarname(self.comp), mode) class ReadFileobjTest(BaseTest): def test_fileobj_with_offset(self): # Skip the first member and store values from the second member # of the testtar. self.tar.next() t = self.tar.next() name = t.name offset = t.offset data = self.tar.extractfile(t).read() self.tar.close() # Open the testtar and seek to the offset of the second member. if self.comp == "gz": _open = gzip.GzipFile elif self.comp == "bz2": _open = bz2.BZ2File else: _open = open fobj = _open(tarname(self.comp), "rb") fobj.seek(offset) # Test if the tarfile starts with the second member. self.tar = tarfile.open(tarname(self.comp), "r:", fileobj=fobj) t = self.tar.next() self.assertEqual(t.name, name) # Read to the end of fileobj and test if seeking back to the # beginning works. self.tar.getmembers() self.assertEqual(self.tar.extractfile(t).read(), data, "seek back did not work") class WriteTest(BaseTest): mode = 'w' def setUp(self): mode = self.mode + self.sep + self.comp self.src = tarfile.open(tarname(self.comp), 'r') self.dstname = tmpname() self.dst = tarfile.open(self.dstname, mode) def tearDown(self): self.src.close() self.dst.close() def test_posix(self): self.dst.posix = 1 self._test() def test_nonposix(self): self.dst.posix = 0 self._test() def test_small(self): self.dst.add(os.path.join(os.path.dirname(__file__),"cfgparser.1")) self.dst.close() self.assertNotEqual(os.stat(self.dstname).st_size, 0) def _test(self): for tarinfo in self.src: if not tarinfo.isreg(): continue f = self.src.extractfile(tarinfo) if self.dst.posix and len(tarinfo.name) > tarfile.LENGTH_NAME and "/" not in tarinfo.name: self.assertRaises(ValueError, self.dst.addfile, tarinfo, f) else: self.dst.addfile(tarinfo, f) def test_add_self(self): dstname = os.path.abspath(self.dstname) self.assertEqual(self.dst.name, dstname, "archive name must be absolute") self.dst.add(dstname) self.assertEqual(self.dst.getnames(), [], "added the archive to itself") cwd = os.getcwd() os.chdir(dirname()) self.dst.add(dstname) os.chdir(cwd) self.assertEqual(self.dst.getnames(), [], "added the archive to itself") class Write100Test(BaseTest): # 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'. def setUp(self): self.name = "01234567890123456789012345678901234567890123456789" self.name += "01234567890123456789012345678901234567890123456789" self.tar = tarfile.open(tmpname(), "w") t = tarfile.TarInfo(self.name) self.tar.addfile(t) self.tar.close() self.tar = tarfile.open(tmpname()) def tearDown(self): self.tar.close() def test(self): self.assertEqual(self.tar.getnames()[0], self.name, "failed to store 100 char filename") class WriteSize0Test(BaseTest): mode = 'w' def setUp(self): self.tmpdir = dirname() self.dstname = tmpname() self.dst = tarfile.open(self.dstname, "w") def tearDown(self): self.dst.close() def test_file(self): path = os.path.join(self.tmpdir, "file") f = open(path, "w") f.close() tarinfo = self.dst.gettarinfo(path) self.assertEqual(tarinfo.size, 0) f = open(path, "w") f.write("aaa") f.close() tarinfo = self.dst.gettarinfo(path) self.assertEqual(tarinfo.size, 3) def test_directory(self): path = os.path.join(self.tmpdir, "directory") if os.path.exists(path): # This shouldn't be necessary, but is <wink> if a previous # run was killed in mid-stream. shutil.rmtree(path) os.mkdir(path) tarinfo = self.dst.gettarinfo(path) self.assertEqual(tarinfo.size, 0) def test_symlink(self): if hasattr(os, "symlink"): path = os.path.join(self.tmpdir, "symlink") os.symlink("link_target", path) tarinfo = self.dst.gettarinfo(path) self.assertEqual(tarinfo.size, 0) class WriteStreamTest(WriteTest): sep = '|' def test_padding(self): self.dst.close() if self.comp == "gz": f = gzip.GzipFile(self.dstname) s = f.read() f.close() elif self.comp == "bz2": f = bz2.BZ2Decompressor() s = file(self.dstname).read() s = f.decompress(s) self.assertEqual(len(f.unused_data), 0, "trailing data") else: f = file(self.dstname) s = f.read() f.close() self.assertEqual(s.count("\0"), tarfile.RECORDSIZE, "incorrect zero padding") class WriteGNULongTest(unittest.TestCase): """This testcase checks for correct creation of GNU Longname and Longlink extensions. It creates a tarfile and adds empty members with either long names, long linknames or both and compares the size of the tarfile with the expected size. It checks for SF bug #812325 in TarFile._create_gnulong(). While I was writing this testcase, I noticed a second bug in the same method: Long{names,links} weren't null-terminated which lead to bad tarfiles when their length was a multiple of 512. This is tested as well. """ 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.posix = False tar.addfile(tarinfo) v1 = self._calc_size(name, link) v2 = tar.offset self.assertEqual(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 ReadGNULongTest(unittest.TestCase): def setUp(self): self.tar = tarfile.open(tarname()) def tearDown(self): self.tar.close() def test_1471427(self): """Test reading of longname (bug #1471427). """ name = "test/" * 20 + "0-REGTYPE" try: tarinfo = self.tar.getmember(name) except KeyError: tarinfo = None self.assert_(tarinfo is not None, "longname not found") self.assert_(tarinfo.type != tarfile.DIRTYPE, "read longname as dirtype") def test_read_name(self): name = ("0-LONGNAME-" * 10)[:101] try: tarinfo = self.tar.getmember(name) except KeyError: tarinfo = None self.assert_(tarinfo is not None, "longname not found") def test_read_link(self): link = ("1-LONGLINK-" * 10)[:101] name = ("0-LONGNAME-" * 10)[:101] try: tarinfo = self.tar.getmember(link) except KeyError: tarinfo = None self.assert_(tarinfo is not None, "longlink not found") self.assert_(tarinfo.linkname == name, "linkname wrong") def test_truncated_longname(self): f = open(tarname()) fobj = StringIO.StringIO(f.read(1024)) f.close() tar = tarfile.open(name="foo.tar", fileobj=fobj) self.assert_(len(tar.getmembers()) == 0, "") tar.close() class ExtractHardlinkTest(BaseTest): def test_hardlink(self): """Test hardlink extraction (bug #857297) """ # Prevent errors from being caught self.tar.errorlevel = 1 self.tar.extract("0-REGTYPE", dirname()) try: # Extract 1-LNKTYPE which is a hardlink to 0-REGTYPE self.tar.extract("1-LNKTYPE", dirname()) except EnvironmentError, e: import errno if e.errno == errno.ENOENT: self.fail("hardlink not extracted properly") class CreateHardlinkTest(BaseTest): """Test the creation of LNKTYPE (hardlink) members in an archive. In this respect tarfile.py mimics the behaviour of GNU tar: If a file has a st_nlink > 1, it will be added a REGTYPE member only the first time. """ def setUp(self): self.tar = tarfile.open(tmpname(), "w") self.foo = os.path.join(dirname(), "foo") self.bar = os.path.join(dirname(), "bar") if os.path.exists(self.foo): os.remove(self.foo) if os.path.exists(self.bar): os.remove(self.bar) f = open(self.foo, "w") f.write("foo") f.close() self.tar.add(self.foo) def test_add_twice(self): # If st_nlink == 1 then the same file will be added as # REGTYPE every time. tarinfo = self.tar.gettarinfo(self.foo) self.assertEqual(tarinfo.type, tarfile.REGTYPE, "add file as regular failed") def test_add_hardlink(self): # If st_nlink > 1 then the same file will be added as # LNKTYPE. os.link(self.foo, self.bar) tarinfo = self.tar.gettarinfo(self.foo) self.assertEqual(tarinfo.type, tarfile.LNKTYPE, "add file as hardlink failed") 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 os.link(self.foo, self.bar) tarinfo = self.tar.gettarinfo(self.bar) self.assertEqual(tarinfo.type, tarfile.REGTYPE, "dereferencing hardlink failed") # Gzip TestCases class ReadTestGzip(ReadTest): comp = "gz" class ReadStreamTestGzip(ReadStreamTest): comp = "gz" class WriteTestGzip(WriteTest): comp = "gz" class WriteStreamTestGzip(WriteStreamTest): comp = "gz" class ReadDetectTestGzip(ReadDetectTest): comp = "gz" class ReadDetectFileobjTestGzip(ReadDetectFileobjTest): comp = "gz" class ReadAsteriskTestGzip(ReadAsteriskTest): comp = "gz" class ReadStreamAsteriskTestGzip(ReadStreamAsteriskTest): comp = "gz" class ReadFileobjTestGzip(ReadFileobjTest): comp = "gz" # Filemode test cases class FileModeTest(unittest.TestCase): def test_modes(self): self.assertEqual(tarfile.filemode(0755), '-rwxr-xr-x') self.assertEqual(tarfile.filemode(07111), '---s--s--t') class OpenFileobjTest(BaseTest): def test_opener(self): # Test for SF bug #1496501. fobj = StringIO.StringIO("foo\n") try: tarfile.open("", mode="r", fileobj=fobj) except tarfile.ReadError: self.assertEqual(fobj.tell(), 0, "fileobj's position has moved") def test_no_name_argument(self): fobj = open(testtar, "rb") tar = tarfile.open(fileobj=fobj, mode="r") self.assertEqual(tar.name, os.path.abspath(fobj.name)) def test_no_name_attribute(self): data = open(testtar, "rb").read() fobj = StringIO.StringIO(data) self.assertRaises(AttributeError, getattr, fobj, "name") tar = tarfile.open(fileobj=fobj, mode="r") self.assertEqual(tar.name, None) def test_empty_name_attribute(self): data = open(testtar, "rb").read() fobj = StringIO.StringIO(data) fobj.name = "" tar = tarfile.open(fileobj=fobj, mode="r") self.assertEqual(tar.name, None) if bz2: # Bzip2 TestCases class ReadTestBzip2(ReadTestGzip): comp = "bz2" class ReadStreamTestBzip2(ReadStreamTestGzip): comp = "bz2" class WriteTestBzip2(WriteTest): comp = "bz2" class WriteStreamTestBzip2(WriteStreamTestGzip): comp = "bz2" class ReadDetectTestBzip2(ReadDetectTest): comp = "bz2" class ReadDetectFileobjTestBzip2(ReadDetectFileobjTest): comp = "bz2" class ReadAsteriskTestBzip2(ReadAsteriskTest): comp = "bz2" class ReadStreamAsteriskTestBzip2(ReadStreamAsteriskTest): comp = "bz2" class ReadFileobjTestBzip2(ReadFileobjTest): comp = "bz2" class PartialReadTestBzip2(unittest.TestCase): # Issue5068: The _BZ2Proxy.read() method loops forever # on an empty or partial bzipped file. def _test_partial_input(self, mode): class MyStringIO(StringIO.StringIO): hit_eof = False def read(self, n): if self.hit_eof: raise AssertionError("infinite loop detected in tarfile.open()") self.hit_eof = self.pos == self.len return StringIO.StringIO.read(self, n) data = bz2.compress(tarfile.TarInfo("foo").tobuf()) for x in range(len(data) + 1): tarfile.open(fileobj=MyStringIO(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") # If importing gzip failed, discard the Gzip TestCases. if not gzip: del ReadTestGzip del ReadStreamTestGzip del WriteTestGzip del WriteStreamTestGzip def test_main(): # Create archive. f = open(tarname(), "rb") fguts = f.read() f.close() if gzip: # create testtar.tar.gz tar = gzip.open(tarname("gz"), "wb") tar.write(fguts) tar.close() if bz2: # create testtar.tar.bz2 tar = bz2.BZ2File(tarname("bz2"), "wb") tar.write(fguts) tar.close() tests = [ FileModeTest, OpenFileobjTest, ReadTest, ReadStreamTest, ReadDetectTest, ReadDetectFileobjTest, ReadAsteriskTest, ReadStreamAsteriskTest, ReadFileobjTest, WriteTest, Write100Test, WriteSize0Test, WriteStreamTest, WriteGNULongTest, ReadGNULongTest, ] if hasattr(os, "link"): tests.append(ExtractHardlinkTest) tests.append(CreateHardlinkTest) if gzip: tests.extend([ ReadTestGzip, ReadStreamTestGzip, WriteTestGzip, WriteStreamTestGzip, ReadDetectTestGzip, ReadDetectFileobjTestGzip, ReadAsteriskTestGzip, ReadStreamAsteriskTestGzip, ReadFileobjTestGzip ]) if bz2: tests.extend([ ReadTestBzip2, ReadStreamTestBzip2, WriteTestBzip2, WriteStreamTestBzip2, ReadDetectTestBzip2, ReadDetectFileobjTestBzip2, ReadAsteriskTestBzip2, ReadStreamAsteriskTestBzip2, ReadFileobjTestBzip2, PartialReadTestBzip2 ]) try: test_support.run_unittest(*tests) finally: if gzip: os.remove(tarname("gz")) if bz2: os.remove(tarname("bz2")) if os.path.exists(dirname()): shutil.rmtree(dirname()) if os.path.exists(tmpname()): os.remove(tmpname()) if __name__ == "__main__": test_main()