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osbuild: fix optional-types

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Optional types were provided in places but were not always correct. Add
mypy checking and fix those that fail(ed).
This commit is contained in:
Simon de Vlieger 2022-07-06 10:54:37 +02:00 • committed by Christian Kellner
parent 6e66c69608
commit 3fd864e5a9
29 changed files with 209 additions and 111 deletions
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12
osbuild/util/linux.py
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@ -141,25 +141,25 @@ class LibCap:
get_bound = lib.cap_get_bound
get_bound.argtypes = (self.cap_value_t,)
get_bound.restype = ctypes.c_int
get_bound.errcheck = self._check_result
get_bound.errcheck = self._check_result # type: ignore
self._get_bound = get_bound
from_name = lib.cap_from_name
from_name.argtypes = (ctypes.c_char_p, ctypes.POINTER(self.cap_value_t),)
from_name.restype = ctypes.c_int
from_name.errcheck = self._check_result
from_name.errcheck = self._check_result # type: ignore
self._from_name = from_name
to_name = lib.cap_to_name
to_name.argtypes = (ctypes.c_int,)
to_name.restype = ctypes.POINTER(ctypes.c_char)
to_name.errcheck = self._check_result
to_name.errcheck = self._check_result # type: ignore
self._to_name = to_name
free = lib.cap_free
free.argtypes = (ctypes.c_void_p,)
free.restype = ctypes.c_int
free.errcheck = self._check_result
free.errcheck = self._check_result # type: ignore
self._free = free
@staticmethod
@ -210,6 +210,10 @@ class LibCap:
"""Translate from the capability's integer value to the its symbolic name"""
raw = self._to_name(value)
val = ctypes.cast(raw, ctypes.c_char_p).value
if val is None:
raise RuntimeError("Failed to cast.")
res = str(val, encoding="utf-8")
self._free(raw)
return res.upper()