1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
import os
from ctypes import *
from ctypes.util import find_library
class Xattr(object):
libc = CDLL(find_library("libc"))
@classmethod
def geterrno(cls):
return c_int.in_dll(cls.libc, 'errno').value
@classmethod
def raise_oserr(cls):
errn = cls.geterrno()
raise OSError(errn, os.strerror(errn))
@classmethod
def _query_xattr(cls, path, siz, syscall, *a):
if siz:
buf = create_string_buffer('\0' * siz)
else:
buf = None
ret = getattr(cls.libc, syscall)(*((path,) + a + (buf, siz)))
if ret == -1:
cls.raise_oserr()
if siz:
return buf.raw[:ret]
else:
return ret
@classmethod
def lgetxattr(cls, path, attr, siz=0):
return cls._query_xattr( path, siz, 'lgetxattr', attr)
@classmethod
def llistxattr(cls, path, siz=0):
ret = cls._query_xattr(path, siz, 'llistxattr')
if isinstance(ret, str):
ret = ret.split('\0')
return ret
@classmethod
def lsetxattr(cls, path, attr, val):
ret = cls.libc.lsetxattr(path, attr, val, len(val), 0)
if ret == -1:
cls.raise_oserr()
@classmethod
def lremovexattr(cls, path, attr):
ret = cls.libc.lremovexattr(path, attr)
if ret == -1:
cls.raise_oserr()
@classmethod
def llistxattr_buf(cls, path):
size = cls.llistxattr(path)
if size == -1:
cls.raise_oserr()
if size == 0:
return []
return cls.llistxattr(path, size)
|
