[issue10761] tarfile.extractall fails to overwrite symlinks
Scott Leerssen
report at bugs.python.org
Fri May 13 18:58:17 CEST 2011
Scott Leerssen <sleerssen at gmail.com> added the comment:
tests that verify the bug/fix:
def test_extractall_broken_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(target_file, arcname=os.path.basename(target_file))
tar.close()
# remove the real file
os.unlink(source_file)
# 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 broken symlinked files")
finally:
tar.close()
finally:
os.unlink(temparchive)
shutil.rmtree(TEMPDIR)
def test_extractall_hardlinks(self):
# Test if extractall works properly when tarfile contains symlinks
TEMPDIR = tempfile.mkdtemp()
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.link(source_file, target_file)
tar = tarfile.open(temparchive,'w')
tar.add(source_file, arcname=os.path.basename(source_file))
tar.add(target_file, arcname=os.path.basename(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 linked files")
finally:
tar.close()
finally:
os.unlink(temparchive)
shutil.rmtree(TEMPDIR)
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<http://bugs.python.org/issue10761>
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