1 import _signal 2 from _signal import * 3 from functools import wraps as _wraps 4 from enum import IntEnum as _IntEnum 5 6 _globals = globals() 7 8 _IntEnum._convert( 9 'Signals', __name__, 10 lambda name: 11 name.isupper() 12 and (name.startswith('SIG') and not name.startswith('SIG_')) 13 or name.startswith('CTRL_')) 14 15 _IntEnum._convert( 16 'Handlers', __name__, 17 lambda name: name in ('SIG_DFL', 'SIG_IGN')) 18 19 if 'pthread_sigmask' in _globals: 20 _IntEnum._convert( 21 'Sigmasks', __name__, 22 lambda name: name in ('SIG_BLOCK', 'SIG_UNBLOCK', 'SIG_SETMASK')) 23 24 25 def _int_to_enum(value, enum_klass): 26 """Convert a numeric value to an IntEnum member. 27 If it's not a known member, return the numeric value itself. 28 """ 29 try: 30 return enum_klass(value) 31 except ValueError: 32 return value 33 34 35 def _enum_to_int(value): 36 """Convert an IntEnum member to a numeric value. 37 If it's not an IntEnum member return the value itself. 38 """ 39 try: 40 return int(value) 41 except (ValueError, TypeError): 42 return value 43 44 45 @_wraps(_signal.signal) 46 def signal(signalnum, handler): 47 handler = _signal.signal(_enum_to_int(signalnum), _enum_to_int(handler)) 48 return _int_to_enum(handler, Handlers) 49 50 51 @_wraps(_signal.getsignal) 52 def getsignal(signalnum): 53 handler = _signal.getsignal(signalnum) 54 return _int_to_enum(handler, Handlers) 55 56 57 if 'pthread_sigmask' in _globals: 58 @_wraps(_signal.pthread_sigmask) 59 def pthread_sigmask(how, mask): 60 sigs_set = _signal.pthread_sigmask(how, mask) 61 return set(_int_to_enum(x, Signals) for x in sigs_set) 62 pthread_sigmask.__doc__ = _signal.pthread_sigmask.__doc__ 63 64 65 if 'sigpending' in _globals: 66 @_wraps(_signal.sigpending) 67 def sigpending(): 68 sigs = _signal.sigpending() 69 return set(_int_to_enum(x, Signals) for x in sigs) 70 71 72 if 'sigwait' in _globals: 73 @_wraps(_signal.sigwait) 74 def sigwait(sigset): 75 retsig = _signal.sigwait(sigset) 76 return _int_to_enum(retsig, Signals) 77 sigwait.__doc__ = _signal.sigwait 78 79 del _globals, _wraps 80
