bug#53739: 28.0.91; "C-x d" fails when "emacs -Q" starts on NetBSD with plan9/bin on head of PATH

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Cc: van.ly@sdf.org,  53739@debbugs.gnu.org
> Date: Thu, 03 Feb 2022 19:02:57 +0800
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> I can't remember the specifics, but IIRC their version of ls simply
> >> prints out each file in the current working directory, without any
> >> option to display permission bits, size, or ownership information.
> 
> > You are saying that "ls -l" doesn't honor the -l option?
> 
> There isn't an -l option, IIRC.

OK.  Do they have a replacement program that behaves like "ls -l"?
Maybe 'dir' or somesuch?  Then the solution would be to give a
different value to insert-directory-program on that platform.