Apply fixes, remove duplicates.

Apply fixes to _random, cStringIO, errno, operator, sys, zlib, etc.; also,
remove duplicate 2.7/math.pyi, 2.7/marshal.pyi.

builtins/3/signal.pyi

@@ -1,51 +1,93 @@
-# Stubs for signal
+"""Stub file for the 'signal' module."""
 
-# Based on http://docs.python.org/3.2/library/signal.html
+from typing import Any, Callable, List, Tuple, Dict, Generic, Union
 
-from typing import Any, overload, Callable
+class ItimerError(IOError): ...
 
-SIG_DFL = 0
-SIG_IGN = 0
-
-# TODO more SIG* constants (these should be platform specific?)
-SIGHUP = 0
-SIGINT = 0
-SIGQUIT = 0
-SIGABRT = 0
-SIGKILL = 0
-SIGALRM = 0
-SIGTERM = 0
-
-SIGUSR1 = 0
-SIGUSR2 = 0
-SIGCONT = 0
-SIGSTOP = 0
-
-SIGPOLL = 0
-SIGVTALRM = 0
+ITIMER_PROF = ...  # type: int
+ITIMER_REAL = ...  # type: int
+ITIMER_VIRTUAL = ...  # type: int
+NSIG = ...  # type: int
+SIGABRT = ...  # type: int
+SIGALRM = ...  # type: int
+SIGBUS = ...  # type: int
+SIGCHLD = ...  # type: int
+SIGCLD = ...  # type: int
+SIGCONT = ...  # type: int
+SIGFPE = ...  # type: int
+SIGHUP = ...  # type: int
+SIGILL = ...  # type: int
+SIGINT = ...  # type: int
+SIGIO = ...  # type: int
+SIGIOT = ...  # type: int
+SIGKILL = ...  # type: int
+SIGPIPE = ...  # type: int
+SIGPOLL = ...  # type: int
+SIGPROF = ...  # type: int
+SIGPWR = ...  # type: int
+SIGQUIT = ...  # type: int
+SIGRTMAX = ...  # type: int
+SIGRTMIN = ...  # type: int
+SIGSEGV = ...  # type: int
+SIGSTOP = ...  # type: int
+SIGSYS = ...  # type: int
+SIGTERM = ...  # type: int
+SIGTRAP = ...  # type: int
+SIGTSTP = ...  # type: int
+SIGTTIN = ...  # type: int
+SIGTTOU = ...  # type: int
+SIGURG = ...  # type: int
+SIGUSR1 = ...  # type: int
+SIGUSR2 = ...  # type: int
+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
 
-NSIG = 0
-ITIMER_REAL = 0
-ITIMER_VIRTUAL = 0
-ITIMER_PROF = 0
+def alarm(time: int) -> int: ...
 
-class ItimerError(IOError): ...
+def default_int_handler(*args, **kwargs) -> Any:
+    raise KeyboardInterrupt()
 
-def alarm(time: int) -> int: ... # Unix
-def getsignal(signalnum: int) -> Any: ...
-def pause() -> None: ... # Unix
-#def setitimer(which: int, seconds: float,
-#              internval: float = None) -> Tuple[float, float]: ... # Unix
-#def getitimer(int which): ... # Unix
-def set_wakeup_fd(fd: int) -> None: ...
-def siginterrupt(signalnum: int, flag: bool) -> None: ...
+def getitimer(which: int) -> tuple: ...
 
-@overload
-def signal(signalnum: int, handler: int) -> Any: ...
-@overload
-def signal(signalnum: int,
-           handler: Callable[[int, Any], None]) -> Any:
-    ... # TODO frame object type
+def getsignal(signalnum: int) -> None:
+    raise ValueError()
+
+def pause() -> None: ...
+
+def pthread_kill(a: int, b: int) -> None:
+    raise OSError()
+
+def pthread_sigmask(a: int, b) -> Any:
+    raise OSError()
+
+def set_wakeup_fd(fd: int) -> int: ...
+
+def setitimer(which: int, seconds: float, internval: float = ...) -> Tuple[float, float]: ...
+
+def siginterrupt(signalnum: int, flag: int) -> None:
+    raise OSError()
+
+def signal(signalnum: int, handler: Union[int, Callable[[int, Any], None]]) -> Any:
+    raise OSError()
+
+def sigpending() -> Any:
+    raise OSError()
+
+def sigtimedwait(a, b) -> Any:
+    raise OSError()
+    raise ValueError()
+
+def sigwait(a) -> int:
+    raise OSError()
+
+def sigwaitinfo(a) -> tuple:
+    raise OSError()
+
+... # TODO frame object type