On September 17, 2025 11:39:55 AM GMT+02:00, Maximilian Immanuel Brandtner
<ma...@linux.ibm.com> wrote:
> On Tue, 2025-09-16 at 00:02 +0200, Filip Hejsek wrote:
> > On Mon, 2025-09-15 at 18:34 +0200, Maximilian Immanuel Brandtner
> > wrote:
> > > Update the terminal size upon SIGWINCH delivery.
> > >
> > > Signed-off-by: Maximilian Immanuel Brandtner <ma...@linux.ibm.com>
> >
> > I don't think this will work, because SIGWINCH is only delivered for
> > the process' controling terminal. Unfortunately I don't think there
> > is
> > any way to get size notifications for arbitrary terminal.
>
> In that case there are two solutions:
> 1. make qemu the controlling process of the pty (this has the
> disadvantage of QEMU being quit when the pty is closed)
A bigger disadvantage is that a process can only have one controlling terminal,
and a terminal can only be the controlling terminal for a single session (and
only sends signals to the foreground process group of that session). It would
require forking a process for each pty, and I don't even know if the master end
can have its own session.
> 2. create a timer polling every eg 100ms to check if the winsize has
> changed
>
> I would go with the second approach then
Me too, the timer is a bit unfortunate, but it's probably the less bad option.
