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Fix for recursive symlink issue #4669 #4670

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merged 7 commits into from
Jun 7, 2020
Merged

Fix for recursive symlink issue #4669 #4670

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1b00746
This is a potential fix to issue #4669. The fix simply catches the
scanon Jun 12, 2019
088b212
It looks like too many levels is error number 40 on linux.
scanon Jun 12, 2019
4531fc8
Switch to using errno instead of hardcoding the number.
scanon Jun 12, 2019
f586668
Fix spelling, smarter assert methods
takluyver Jun 25, 2019
4bad376
Log unrecognised errors and continue listing directory
takluyver Oct 8, 2019
bc41afb
Skip recursive symlink test entirely on Windows
takluyver Oct 8, 2019
c1a3117
Fix which test is skipped on Windows
takluyver Oct 8, 2019
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18 changes: 12 additions & 6 deletions notebook/services/contents/filemanager.py
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Original file line number Diff line number Diff line change
Expand Up @@ -334,12 +334,18 @@ def _dir_model(self, path, content=True):
self.log.debug("%s not a regular file", os_path)
continue

if self.should_list(name):
if self.allow_hidden or not is_file_hidden(os_path, stat_res=st):
contents.append(
self.get(path='%s/%s' % (path, name), content=False)
)

try:
if self.should_list(name):
if self.allow_hidden or not is_file_hidden(os_path, stat_res=st):
contents.append(
self.get(path='%s/%s' % (path, name), content=False)
)
except OSError as e:
# Ignore recursive links and move on
if e.errno==errno.ELOOP:
continue
else:
raise e
model['format'] = 'json'

return model
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20 changes: 20 additions & 0 deletions notebook/services/contents/tests/test_manager.py
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Expand Up @@ -129,6 +129,26 @@ def test_bad_symlink(self):
# broken symlinks should still be shown in the contents manager
self.assertTrue('bad symlink' in contents)

@dec.skipif(sys.platform == 'win32' and sys.version_info[0] < 3)
def test_recursive_symlink(self):
with TemporaryDirectory() as td:
cm = FileContentsManager(root_dir=td)
path = 'test recursive symlink'
_make_dir(cm, path)
os_path = cm._get_os_path(path)
os.symlink("recursive", os.path.join(os_path, "recursive"))
file_model = cm.new_untitled(path=path, ext='.txt')

model = cm.get(path)

contents = {
content['name']: content for content in model['content']
}
self.assertTrue('untitled.txt' in contents)
self.assertEqual(contents['untitled.txt'], file_model)
# recusrive symlinks should not be shown in the contents manager
self.assertFalse('recusrive' in contents)
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Spelling of 'recursive'.

Also, we should use the assertIn and assertNotIn methods rather than assertTrue and assertFalse. The more specific methods give more useful messages when things fail.


@dec.skipif(sys.platform == 'win32' and sys.version_info[0] < 3)
def test_good_symlink(self):
with TemporaryDirectory() as td:
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