Update a bunch of stubs

builtins/3/signal.pyi

@@ -1,12 +1,14 @@
 """Stub file for the 'signal' module."""
 
-from typing import Any, Callable, List, Tuple, Dict, Generic, Union
+from typing import Any, Callable, List, Tuple, Dict, Generic, Union, Optional, Iterable
+from types import FrameType
 
 class ItimerError(IOError): ...
 
 ITIMER_PROF = ...  # type: int
 ITIMER_REAL = ...  # type: int
 ITIMER_VIRTUAL = ...  # type: int
+
 NSIG = ...  # type: int
 SIGABRT = ...  # type: int
 SIGALRM = ...  # type: int
@@ -43,51 +45,73 @@ SIGVTALRM = ...  # type: int
 SIGWINCH = ...  # type: int
 SIGXCPU = ...  # type: int
 SIGXFSZ = ...  # type: int
+
 SIG_DFL = ...  # type: int
 SIG_IGN = ...  # type: int
 
 CTRL_C_EVENT = 0 # Windows
 CTRL_BREAK_EVENT = 0 # Windows
 
+SIG_BLOCK = ...  # type: int
+SIG_UNBLOCK = ...  # type: int
+SIG_SETMASK = ...  # type: int
+
+_HANDLER = Union[Callable[[int, FrameType], None], int, None]
+
+class struct_siginfo(Tuple[int, int, int, int, int, int, int]):
+    def __init__(self, sequence: Iterable[int]) -> None: ...
+    @property
+    def si_signo(self) -> int: ...
+    @property
+    def si_code(self) -> int: ...
+    @property
+    def si_errno(self) -> int: ...
+    @property
+    def si_pid(self) -> int: ...
+    @property
+    def si_uid(self) -> int: ...
+    @property
+    def si_status(self) -> int: ...
+    @property
+    def si_band(self) -> int: ...
+
 def alarm(time: int) -> int: ...
 
-def default_int_handler(*args, **kwargs) -> Any:
+def default_int_handler(signum: int, frame: FrameType) -> None:
     raise KeyboardInterrupt()
 
-def getitimer(which: int) -> tuple: ...
+def getitimer(which: int) -> Tuple[float, float]: ...
 
-def getsignal(signalnum: int) -> None:
+def getsignal(signalnum: int) -> _HANDLER:
     raise ValueError()
 
 def pause() -> None: ...
 
-def pthread_kill(a: int, b: int) -> None:
+def pthread_kill(thread_id: int, signum: int) -> None:
     raise OSError()
 
-def pthread_sigmask(a: int, b) -> Any:
+def pthread_sigmask(how: int, mask: Iterable[int]) -> Set[int]:
     raise OSError()
 
 def set_wakeup_fd(fd: int) -> int: ...
 
-def setitimer(which: int, seconds: float, internval: float = ...) -> Tuple[float, float]: ...
+def setitimer(which: int, seconds: float, interval: float = ...) -> Tuple[float, float]: ...
 
-def siginterrupt(signalnum: int, flag: int) -> None:
+def siginterrupt(signalnum: int, flag: bool) -> None:
     raise OSError()
 
-def signal(signalnum: int, handler: Union[int, Callable[[int, Any], None]]) -> Any:
+def signal(signalnum: int, handler: _HANDLER) -> _HANDLER:
     raise OSError()
 
 def sigpending() -> Any:
     raise OSError()
 
-def sigtimedwait(a, b) -> Any:
+def sigtimedwait(sigset: Iterable[int], timeout: float) -> Optional[struct_siginfo]:
     raise OSError()
     raise ValueError()
 
-def sigwait(a) -> int:
+def sigwait(sigset: Iterable[int]) -> int:
     raise OSError()
 
-def sigwaitinfo(a) -> tuple:
+def sigwaitinfo(sigset: Iterable[int]) -> struct_siginfo:
     raise OSError()
-
-... # TODO frame object type