Implement #1220212. Add os.kill support for Windows.
os.kill takes one of two newly added signals, CTRL_C_EVENT and
CTRL_BREAK_EVENT, or any integer value. The events are a special case
which work with subprocess console applications which implement a
special console control handler. Any other value but those two will
cause os.kill to use TerminateProcess, outright killing the process.
This change adds win_console_handler.py, which is a script to implement
SetConsoleCtrlHandler and applicable handler function, using ctypes.
subprocess also gets another attribute which is a necessary flag to
creationflags in Popen in order to send the CTRL events.
diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index b4e39a4..11d9607 100644
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -1719,7 +1719,14 @@
Send signal *sig* to the process *pid*. Constants for the specific signals
available on the host platform are defined in the :mod:`signal` module.
- Availability: Unix.
+
+ Windows: The :data:`signal.CTRL_C_EVENT` and
+ :data:`signal.CTRL_BREAK_EVENT` signals are special signals which can
+ only be sent to console processes which share a common console window,
+ e.g., some subprocesses. Any other value for *sig* will cause the process
+ to be unconditionally killed by the TerminateProcess API, and the exit code
+ will be set to *sig*. The Windows version of :func:`kill` additionally takes
+ process handles to be killed.
.. function:: killpg(pgid, sig)
diff --git a/Doc/library/signal.rst b/Doc/library/signal.rst
index 84f08b3..300c717 100644
--- a/Doc/library/signal.rst
+++ b/Doc/library/signal.rst
@@ -75,6 +75,20 @@
the system are defined by this module.
+.. data:: CTRL_C_EVENT
+
+ The signal corresponding to the CTRL+C keystroke event.
+
+ Availability: Windows.
+
+
+.. data:: CTRL_BREAK_EVENT
+
+ The signal corresponding to the CTRL+BREAK keystroke event.
+
+ Availability: Windows.
+
+
.. data:: NSIG
One more than the number of the highest signal number.
diff --git a/Doc/library/subprocess.rst b/Doc/library/subprocess.rst
index b557bcd..439a46d 100644
--- a/Doc/library/subprocess.rst
+++ b/Doc/library/subprocess.rst
@@ -320,8 +320,9 @@
.. note::
- On Windows only SIGTERM is supported so far. It's an alias for
- :meth:`terminate`.
+ On Windows, SIGTERM is an alias for :meth:`terminate`. CTRL_C_EVENT and
+ CTRL_BREAK_EVENT can be sent to processes started with a `creationflags`
+ parameter which includes `CREATE_NEW_PROCESS_GROUP`.
.. versionadded:: 2.6