bug#72117: Command doesn't execute correctly in eshell

[Eli Zaretskii]

> Date: Fri, 26 Jul 2024 22:18:22 -0700
> From: Jim Porter <jporterbugs@gmail.com>
> Cc: eliz@gnu.org
> 
> On 7/14/2024 6:01 PM, Jim Porter wrote:
> > On 7/14/2024 12:33 PM, the_wurfkreuz via Bug reports for GNU Emacs, the 
> > Swiss army knife of text editors wrote:
> >   But that's not the most interesting part. I can execute the
> >> command with 'eshell/sudo'. But after the command execution emacs will
> >> take the whole CPU processing time if i have 
> >> '(global-display-line-numbers-mode 1)'
> >> option enabled.
> > 
> > I can't reproduce this particular issue, but I can reproduce *an* issue. 
> > It seems to be due to "head -10" exiting early (as it should), which 
> > results in a broken pipe. However, Eshell's broken pipe handling wasn't 
> > properly cleaning up the process ("grep" in this example).
> 
> Eli, would this patch (re-attached here) be ok for Emacs 30? It's not a 
> perfect solution (the fix currently on master is much better), but it's 
> the least-risky change to this code that I could make, and it should 
> improve matters somewhat for the release branch.

This is okay for emacs-30, thanks.