Re: install-sh and $RANDOM

[coypu]

On Mon, Oct 17, 2016 at 04:56:05PM -0500, Eric Blake wrote:
> Second, your claim that things are "spuriously bad if $RANDOM does not
> exist" is false.  Look at the full context:
> 
>             tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$
>             trap 'ret=$?; rmdir "$tmpdir/d" "$tmpdir" 2>/dev/null; exit
> $ret' 0

I don't mean that it's dangerous to use (endangers the user), but deleting
those directories when $tmpdir is just /tmp/ins- will make this script race
other instances of itself, and delete their work.

(I didn't find the script in automake's git repository, so assumed this
is the place)