cygwin 3.1 pseudo console in PTY and break/ctrl-c handling

[Thomas Wolff]

Am 18.02.2020 um 22:16 schrieb Kevin Schnitzius via cygwin:
> With Cygwin version 3.0.7-1, crtl-c kills native apps that are started from the shell,  For example, starting notepad in the foreground from bash would be kill by a ctrl-c.
>
> With Cygwin version 3.1.2-1, crtl-c DOES NOT kill native apps that are started from the shell,
>
> Can I restore this behavior?
>
> With 3.1.2-1:
>
> mintty -o "CA+F12:break"Â  Â  Â  Â  Â  Â  Â  Â =====>Â  Â  ctrl-alt-F12 causes a break and kills notepad
> mintty -o "c:break"Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  =====>Â  Â  ctrl-shift-c causes a break and kills notepad
> mintty -o "C+c:break"Â  Â  Â  Â  Â  Â  Â  Â  Â  =====>Â  FAIL -- ctrl-c kills native apps but notepad is not affected
> mintty -o "CA+c:break"Â  Â  Â  Â  Â  Â  Â  Â  Â =====>Â  FAIL -- ctrl-alt-c kills native apps but notepad is not affected
This would be mintty -o KeyFunctions='CA+F12:break' etc.
The latter two are not valid mintty configuration; Ctrl is only 
supported as a modifier for function keys and special keys, not letters. 
This is unchanged with the cygwin version.

> These tests show that the 'break' signal can be propagated from mintty but is not for the ctrl-c case.
>
> I am guessing that this behavior is from the pty handing but I have not dug into this code or installed winpty.
>
> Is all this documented somewhere that I could not find?
>
> Kevin
>
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