本文整理汇总了Python中xattr.set函数的典型用法代码示例。如果您正苦于以下问题:Python set函数的具体用法?Python set怎么用?Python set使用的例子?那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了set函数的15个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: _apply_linux_xattr_rec
def _apply_linux_xattr_rec(self, path, restore_numeric_ids=False):
if not xattr:
if self.linux_xattr:
add_error("%s: can't restore xattr; xattr support missing.\n"
% path)
return
existing_xattrs = set(xattr.list(path, nofollow=True))
if self.linux_xattr:
for k, v in self.linux_xattr:
if k not in existing_xattrs \
or v != xattr.get(path, k, nofollow=True):
try:
xattr.set(path, k, v, nofollow=True)
except IOError, e:
if e.errno == errno.EPERM \
or e.errno == errno.EOPNOTSUPP:
raise ApplyError('xattr.set: %s' % e)
else:
raise
existing_xattrs -= frozenset([k])
for k in existing_xattrs:
try:
xattr.remove(path, k, nofollow=True)
except IOError, e:
if e.errno == errno.EPERM:
raise ApplyError('xattr.remove: %s' % e)
else:
raise
示例2: _copyxattr
def _copyxattr(src, dest, exclude=None):
try:
attrs = xattr.list(src)
except IOError as e:
if e.errno != OperationNotSupported.errno:
raise
attrs = ()
if attrs:
if exclude is not None and isinstance(attrs[0], bytes):
exclude = exclude.encode(_encodings['fs'])
exclude = _get_xattr_excluder(exclude)
for attr in attrs:
if exclude(attr):
continue
try:
xattr.set(dest, attr, xattr.get(src, attr))
raise_exception = False
except IOError:
raise_exception = True
if raise_exception:
raise OperationNotSupported(_("Filesystem containing file '%s' "
"does not support extended attribute '%s'") %
(_unicode_decode(dest), _unicode_decode(attr)))
示例3: preserve_xattrs
def preserve_xattrs(path, nofollow=False, namespace=None):
"""Context manager to save/restore extended attributes on |path|
If you want to rewrite a file (possibly replacing it with a new one), but
want to preserve the extended attributes, this will do the trick.
# First read all the extended attributes.
with save_xattrs('/some/file'):
... rewrite the file ...
# Now the extended attributes are restored as needed.
"""
kwargs = {'nofollow': nofollow,}
if namespace:
# Compiled xattr python module does not like it when namespace=None.
kwargs['namespace'] = namespace
old_attrs = dict(xattr.get_all(path, **kwargs))
try:
yield
finally:
new_attrs = dict(xattr.get_all(path, **kwargs))
for name, value in new_attrs.items():
if name not in old_attrs:
# Clear out new ones.
xattr.remove(path, name, **kwargs)
elif new_attrs[name] != old_attrs[name]:
# Update changed ones.
xattr.set(path, name, value, **kwargs)
for name, value in old_attrs.items():
if name not in new_attrs:
# Re-add missing ones.
xattr.set(path, name, value, **kwargs)
示例4: _fix
def _fix(self):
logger.debug("Fixing records for %s", self)
files = Set(os.listdir(self.dirpath))
attrs = {}
for filename in files:
path = os.path.join(self.dirpath, filename)
if os.path.islink(path):
# just copy symlink attrs, as they can't be placed on a symlink
try:
attrs[filename] = self._saved_attrs[filename]
except KeyError: pass # no entry in self._saved_attrs
continue
try:
recovered_attrs = self._saved_attrs[filename]
except KeyError: pass
else:
file_attrs = self._get_xattrs(filename)
logger.debug("xattrs for %s: %r", filename, file_attrs)
for key, val in recovered_attrs.items():
xattr_val = file_attrs.get(key, None)
if xattr_val != val:
logger.info("File %s has xattr %r=%s, but serialized data has %s - using serialized data", filename, key, xattr_val, val)
xattr.set(path, key, val, namespace=xattr.NS_USER)
self._update_saved_attrs(filename, dest=attrs)
removed_files = Set(self._saved_attrs.keys()).difference(Set(attrs.keys()))
for filename in removed_files:
logger.debug("Dropping metadata for missing file %s: %r", os.path.join(self.dirpath, filename), self._saved_attrs[filename])
if attrs != self._saved_attrs:
self._update(attrs)
示例5: test_xattrs_with_no_serialized_value_are_kept
def test_xattrs_with_no_serialized_value_are_kept(self):
dumbattr.set(self.file1, "test1", "1")
xattr.set(self.file1, "test2", "2", namespace=xattr.NS_USER)
self.assertEqual(self.serialized_metadata(), {'file1': {'test1':'1'}})
self.assertEqual(dumbattr.load(self.file1).copy(), {'test1': '1', 'test2':'2'})
self.assertEqual(self.serialized_metadata(), {'file1': {'test1': '1', 'test2':'2'}})
示例6: xattr_sync
def xattr_sync(file_name, meta):
""" Synchronize the xattrs on a file with a hash of our choosing """
to_delete, to_set = xattr_sync_impl(file_name, meta)
for k in to_delete:
xattr.remove(file_name, k)
for k,v in to_set.items():
xattr.set(file_name, k, v, namespace=xattr.NS_USER)
示例7: test_xattrs_overriden_by_serialized_attrs
def test_xattrs_overriden_by_serialized_attrs(self):
dumbattr.set(self.file1, "test1", "1")
xattr.set(self.file1, "test1", "2", namespace=xattr.NS_USER)
self.assertEqual(self.serialized_metadata(), {'file1': {'test1':'1'}})
# load() has the side effect of fixing any discrepancies, just like `fix()`
self.assertEqual(dumbattr.load(self.file1).copy(), {'test1': '1'})
self.assertEqual(self.all_xattrs(self.file1), {b'test1': b'1'})
示例8: _checkListSetGet
def _checkListSetGet(self, item, symlink=False, use_ns=False):
"""check list, set, get operations against an item"""
self.assertEqual(self._ignore(xattr.list(item, symlink)),
[])
self.assertRaises(EnvironmentError, xattr.set, item,
self.USER_ATTR, self.USER_VAL, flags=XATTR_REPLACE)
self.assertRaises(EnvironmentError, xattr.set, item,
self.USER_NN, self.USER_VAL, flags=XATTR_REPLACE,
namespace=NS_USER)
try:
if use_ns:
xattr.set(item, self.USER_NN, self.USER_VAL,
namespace=NS_USER,
nofollow=symlink)
else:
xattr.set(item, self.USER_ATTR, self.USER_VAL,
nofollow=symlink)
except IOError:
err = sys.exc_info()[1]
if err.errno == errno.EPERM and symlink:
# symlinks may fail, in which case we abort the rest
# of the test for this case
return
raise
self.assertRaises(EnvironmentError, xattr.set, item,
self.USER_ATTR, self.USER_VAL, flags=XATTR_CREATE)
self.assertRaises(EnvironmentError, xattr.set, item,
self.USER_NN, self.USER_VAL,
flags=XATTR_CREATE, namespace=NS_USER)
self.assertEqual(self._ignore(xattr.list(item, nofollow=symlink)),
[self.USER_ATTR])
self.assertEqual(self._ignore(xattr.list(item, nofollow=symlink,
namespace=EMPTY_NS)),
[self.USER_ATTR])
self.assertEqual(xattr.list(item, namespace=NS_USER, nofollow=symlink),
[self.USER_NN])
self.assertEqual(xattr.get(item, self.USER_ATTR, nofollow=symlink),
self.USER_VAL)
self.assertEqual(xattr.get(item, self.USER_NN, nofollow=symlink,
namespace=NS_USER), self.USER_VAL)
self.assertEqual(self._ignore_tuples(xattr.get_all(item,
nofollow=symlink)),
[(self.USER_ATTR, self.USER_VAL)])
self.assertEqual(xattr.get_all(item, nofollow=symlink,
namespace=NS_USER),
[(self.USER_NN, self.USER_VAL)])
if use_ns:
xattr.remove(item, self.USER_NN, namespace=NS_USER)
else:
xattr.remove(item, self.USER_ATTR)
self.assertEqual(self._ignore(xattr.list(item, symlink)), [])
self.assertEqual(self._ignore_tuples(xattr.get_all(item,
nofollow=symlink)),
[])
self.assertRaises(EnvironmentError, xattr.remove,
item, self.USER_ATTR, nofollow=symlink)
self.assertRaises(EnvironmentError, xattr.remove, item,
self.USER_NN, namespace=NS_USER, nofollow=symlink)
示例9: _copyxattr
def _copyxattr(src, dest):
for attr in xattr.list(src):
try:
xattr.set(dest, attr, xattr.get(src, attr))
raise_exception = False
except IOError:
raise_exception = True
if raise_exception:
raise OperationNotSupported("Filesystem containing file '%s' does not support extended attributes" % dest)
示例10: write_cache
def write_cache(self):
if not xattr:
return
try:
self.clear_cache()
xattr.set(self.name, 'user.pyanidb.mtime', str(int(self.mtime)))
for n in ('ed2k', 'md5', 'sha1', 'crc32'):
if hasattr(self, n):
xattr.set(self.name, 'user.pyanidb.' + n, getattr(self, n))
except IOError:
pass
示例11: save_license
def save_license(license_text, license_signature):
license_file = os.path.join(get_oscar_dir(), "etc/license.txt")
with open(license_file, "w") as f:
f.write(license_text + '\n')
f.write(license_signature + '\n')
license_file = os.path.join(get_oscar_dir(), "bin/oscar")
try:
xattr.set(license_file, "user.oscar.license", license_text)
xattr.set(license_file, "user.oscar.license.signature", license_signature)
except IOError, e:
if e.errno != errno.ENODATA: raise e
示例12: check_user_xattr
def check_user_xattr(path):
if not os.path.exists(path):
return False
try:
xattr.set(path, 'user.test.key1', 'value1')
except IOError as err:
logging.exception("check_user_xattr: set failed on %s err: %s", path, str(err))
raise
try:
xattr.remove(path, 'user.test.key1')
except Exception, err:
logging.exception("xattr.remove failed on %s err: %s", path, str(err))
示例13: testSymlinkOps
def testSymlinkOps(self):
"""test symlink operations"""
_, sname = self._getsymlink()
self.assertRaises(EnvironmentError, xattr.list, sname)
self._checkListSetGet(sname, symlink=True)
self._checkListSetGet(sname, symlink=True, use_ns=True)
target, sname = self._getsymlink(dangling=False)
xattr.set(target, self.USER_ATTR, self.USER_VAL)
self.assertEqual(xattr.list(target), [self.USER_ATTR])
self.assertEqual(xattr.list(sname, nofollow=True), [])
self.assertRaises(EnvironmentError, xattr.remove, sname, self.USER_ATTR, nofollow=True)
xattr.remove(sname, self.USER_ATTR, nofollow=False)
示例14: check_user_xattr
def check_user_xattr(path):
if not os.path.exists(path):
return False
try:
xattr.set(path, 'user.test.key1', 'value1')
except IOError as err:
logging.exception("check_user_xattr: set failed on %s err: %s", path, str(err))
raise
try:
xattr.remove(path, 'user.test.key1')
except IOError as err:
logging.exception("check_user_xattr: remove failed on %s err: %s", path, str(err))
#Remove xattr may fail in case of concurrent remove.
return True
示例15: testMixedAccess
def testMixedAccess(self):
"""test mixed access to file"""
fh, fname = self._getfile()
fo = os.fdopen(fh)
self.assertEqual(xattr.list(fname), [])
xattr.set(fname, self.USER_ATTR, self.USER_VAL)
self.assertEqual(xattr.list(fh), [self.USER_ATTR])
self.assertEqual(xattr.list(fh, namespace=NS_USER), [self.USER_NN])
self.assertEqual(xattr.get(fo, self.USER_ATTR), self.USER_VAL)
self.assertEqual(xattr.get(fo, self.USER_NN, namespace=NS_USER), self.USER_VAL)
self.assertEqual(xattr.get_all(fo), [(self.USER_ATTR, self.USER_VAL)])
self.assertEqual(xattr.get_all(fo, namespace=NS_USER), [(self.USER_NN, self.USER_VAL)])
self.assertEqual(xattr.get_all(fname), [(self.USER_ATTR, self.USER_VAL)])
self.assertEqual(xattr.get_all(fname, namespace=NS_USER), [(self.USER_NN, self.USER_VAL)])
fo.close()