bug#17036: Continuation for Emacs: invoking a process on exit?

[Eli Zaretskii]

> Resent-From: Lars Ingebrigtsen <larsi@gnus.org>
> Original-Sender: "Debbugs-submit" <debbugs-submit-bounces@debbugs.gnu.org>
> Resent-CC: bug-gnu-emacs@gnu.org
> Resent-Sender: help-debbugs@gnu.org
> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Sun, 17 Apr 2022 13:38:10 +0200
> Cc: 17036@debbugs.gnu.org, Andreas Schwab <schwab@linux-m68k.org>,
>  Reuben Thomas <rrt@sc3d.org>
> 
> Glenn Morris <rgm@gnu.org> writes:
> 
> > I could imagine a `restart-emacs' command having some small utility.
> 
> I've now added this command to Emacs 29.

As implemented, it won't work reliably on MS-Windows, because execvp
there doesn't do what you think it should.  I think we should use
sys_spawnve instead.