Sending signals to a subprocess

Andy Koppe
Mon Oct 18 18:10:00 GMT 2010

On 18 October 2010 18:27, Ken Brown wrote:
> On 10/18/2010 10:58 AM, Christopher Faylor wrote:
>> On Sat, Oct 16, 2010 at 02:06:56PM -0400, Ken Brown wrote:
>>> On 10/16/2010 1:17 PM, Ken Brown wrote:
>>>> I could use some help fixing a longstanding bug in the Cygwin build of
>>>> emacs, in which emacs is unable to send signals to subprocesses.  A
>>>> symptom from the user's point of view is that one cannot interrupt a
>>>> process in shell mode by typing C-c C-c.  I've found a workaround that
>>>> handles that case (SIGINT), as well as SIGQUIT and SIGTSTP.  But as long
>>>> as I'm fixing this, I'd like to do it right and figure out how to handle
>>>> all signals.
>>>> This boils down to finding the right process group ID to pass to 'kill'.
>>>> On systems that have TIOCGPGRP, emacs uses the following code (in
>>>> src/process.c) to get this ID:
>> If it helps, I can implement TIOCGPGRP so it will be available in Cygwin
>> 1.7.9.
> Yes, that would be great.  Thanks.

I'd put that to use in mintty too, to improve support for relative
paths when opening a file with Ctrl+click or the 'Open' menu command.


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