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86 lines
2.5 KiB
Cython
86 lines
2.5 KiB
Cython
import os
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from attic.helpers import user2uid, group2gid
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API_VERSION = 1
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cdef extern from "sys/acl.h":
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ctypedef struct _acl_t:
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pass
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ctypedef _acl_t *acl_t
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int acl_free(void *obj)
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acl_t acl_get_link_np(const char *path, int type)
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acl_t acl_set_link_np(const char *path, int type, acl_t acl)
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acl_t acl_from_text(const char *buf)
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char *acl_to_text(acl_t acl, ssize_t *len_p)
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int ACL_TYPE_EXTENDED
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def _remove_numeric_id_if_possible(acl):
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"""Replace the user/group field with the local uid/gid if possible
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"""
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entries = []
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for entry in acl.decode('ascii').split('\n'):
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if entry:
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fields = entry.split(':')
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if fields[0] == 'user':
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if user2uid(fields[2]) is not None:
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fields[1] = fields[3] = ''
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elif fields[0] == 'group':
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if group2gid(fields[2]) is not None:
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fields[1] = fields[3] = ''
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entries.append(':'.join(fields))
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return ('\n'.join(entries)).encode('ascii')
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def _remove_non_numeric_identifier(acl):
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"""Remove user and group names from the acl
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"""
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entries = []
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for entry in acl.split(b'\n'):
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if entry:
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fields = entry.split(b':')
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if fields[0] in (b'user', b'group'):
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fields[2] = b''
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entries.append(b':'.join(fields))
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else:
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entries.append(entry)
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return b'\n'.join(entries)
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def acl_get(path, item, numeric_owner=False):
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cdef acl_t acl = NULL
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cdef char *text = NULL
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try:
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acl = acl_get_link_np(<bytes>os.fsencode(path), ACL_TYPE_EXTENDED)
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if acl == NULL:
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return
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text = acl_to_text(acl, NULL)
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if text == NULL:
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return
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if numeric_owner:
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item[b'acl_extended'] = _remove_non_numeric_identifier(text)
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else:
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item[b'acl_extended'] = text
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finally:
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acl_free(text)
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acl_free(acl)
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def acl_set(path, item, numeric_owner=False):
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cdef acl_t acl = NULL
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try:
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try:
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if numeric_owner:
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acl = acl_from_text(item[b'acl_extended'])
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else:
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acl = acl_from_text(<bytes>_remove_numeric_id_if_possible(item[b'acl_extended']))
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except KeyError:
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return
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if acl == NULL:
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return
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if acl_set_link_np(<bytes>os.fsencode(path), ACL_TYPE_EXTENDED, acl):
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return
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finally:
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acl_free(acl)
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