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"""
pyxattr and xattr have differing API, for example xattr assumes
that (like on OSX) attribute keys are valid UTF-8, while pyxattr
just passes through the raw bytestring.
This module provides compatibility for the pyxattr API.
"""
import sys
from .compat import (binary_type, integer_types, text_type)
from .lib import (XATTR_NOFOLLOW, XATTR_CREATE, XATTR_REPLACE,
XATTR_NOSECURITY, XATTR_MAXNAMELEN, XATTR_FINDERINFO_NAME,
XATTR_RESOURCEFORK_NAME, _getxattr, _fgetxattr, _setxattr, _fsetxattr,
_removexattr, _fremovexattr, _listxattr, _flistxattr)
__all__ = [
"NS_SECURITY", "NS_USER", "NS_SYSTEM", "NS_TRUSTED",
"getxattr", "get", "get_all", "setxattr", "set",
"removexattr", "remove", "listxattr", "list"
]
NS_SECURITY = "security"
NS_USER = "user"
NS_SYSTEM = "system"
NS_TRUSTED = "trusted"
_NO_NS = object()
_fsencoding = sys.getfilesystemencoding()
def _call(item, name_func, fd_func, *args):
if isinstance(item, integer_types):
return fd_func(item, *args)
elif hasattr(item, 'fileno'):
return fd_func(item.fileno(), *args)
elif isinstance(item, binary_type):
return name_func(item, *args)
elif isinstance(item, text_type):
item = item.encode(_fsencoding)
return name_func(item, *args)
else:
raise TypeError("argument must be string, int or file object")
def _add_ns(item, ns):
if ns is None:
raise TypeError("namespace must not be None")
if ns == _NO_NS:
return item
return "%s.%s" % (ns, item)
def getxattr(item, attribute, nofollow=False):
options = nofollow and XATTR_NOFOLLOW or 0
return _call(item, _getxattr, _fgetxattr, attribute, 0, 0, options)
def get(item, name, nofollow=False, namespace=_NO_NS):
name = _add_ns(name, namespace)
return getxattr(item, name, nofollow=nofollow)
def get_all(item, nofollow=False, namespace=_NO_NS):
if namespace is not None and namespace != _NO_NS:
namespace = '%s.' % namespace
l = listxattr(item, nofollow=nofollow)
result = []
for name in l:
try:
if namespace is not None and namespace != _NO_NS:
if not name.startswith(namespace):
continue
result.append((name[len(namespace):],
getxattr(item, name, nofollow=nofollow)))
else:
result.append((name, getxattr(item, name, nofollow=nofollow)))
except IOError:
pass
return result
def setxattr(item, name, value, flags=0, nofollow=False):
options = nofollow and XATTR_NOFOLLOW or 0
options |= flags
return _call(item, _setxattr, _fsetxattr, name, value, 0, options)
def set(item, name, value, nofollow=False, flags=0, namespace=_NO_NS):
name = _add_ns(name, namespace)
return setxattr(item, name, value, flags=flags, nofollow=nofollow)
def removexattr(item, name, nofollow=False):
options = nofollow and XATTR_NOFOLLOW or 0
return _call(item, _removexattr, _fremovexattr, name, options)
def remove(item, name, nofollow=False, namespace=_NO_NS):
name = _add_ns(name, namespace)
return removexattr(item, name, nofollow=nofollow)
def listxattr(item, nofollow=False):
options = nofollow and XATTR_NOFOLLOW or 0
res = _call(item, _listxattr, _flistxattr, options).split(b'\x00')
res.pop()
return res
def list(item, nofollow=False, namespace=_NO_NS):
if not namespace or namespace == _NO_NS:
return listxattr(item, nofollow=nofollow)
namespace = "%s." % namespace
l = listxattr(item, nofollow=nofollow)
result = []
for name in l:
if not name.startswith(namespace):
continue
result.append(name[len(namespace):])
return result
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