control: reassign -1 sway
Hello,
On Wed 02 Jun 2021 at 08:09AM GMT, Daniel Eklof wrote:
> Hi (author of foot here),
>
> I happened to see this bug, and it caught my interest. What I found is this:
>
> SIGPIPE is Sway's doing. It configures it to be ignored (by setting its
> signal handler to SIG_IGN). Now, normally signal dispositions are restored to
> their defaults after an exec(). The exception is ignored signals, which _do_
> get inherited.
>
> The combination of foot+bash is important too, because neither foot, nor bash
> restore signals they don't touch. In other words, SIGPIPE being ignored is
> inherited from Sway, through foot, through bash, and finally into dgit. Both
> zsh and fish appear to reset all signals, and are not affected.
>
> Now, foot _could_ also restore all signals, just like zsh and fish. For the
> time being I think it's better not to do so, since it would just have hidden
> the bug in Sway.
>
> There was also a bug in foot, where an ignored SIGHUP could "leak" into
> spawned processes.
>
> I'll try to put together a patch for sway.
Thank you for your input here. Very helpful.
--
Sean Whitton
signature.asc
Description: PGP signature
