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

[Eli Zaretskii]

> Date: Sun, 17 Apr 2022 15:34:55 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: rgm@gnu.org, 17036@debbugs.gnu.org, schwab@linux-m68k.org, rrt@sc3d.org
> 
> > From: Lars Ingebrigtsen <larsi@gnus.org>
> > Cc: rgm@gnu.org,  17036@debbugs.gnu.org,  schwab@linux-m68k.org,  
> > rrt@sc3d.org
> > Date: Sun, 17 Apr 2022 14:08:49 +0200
> > 
> > Eli Zaretskii <eliz@gnu.org> writes:
> > 
> > > 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.
> > 
> > Ah, I grepped for execvp to see whether we already used it, but didn't
> > notice that the hits were from Gnulib.
> > 
> > I'm not familiar with sys_spawnve -- can you do the adjustments?
> 
> I don't think I will have the time.  It isn't a simple job, because
> just calling sys_spawnve will not do -- that function currently
> supports only Emacs sub-processes.

I eventually had an implementation idea that is much simpler than the
above, so I went ahead and implemented it.  It currently doesn't work
in a -nw session, I hope to debug that later.