readline.sh in socat before1.8.0.2 relies on the /tmp/$USER/stderr2 file.Referenceshttps://repo.or.cz/socat.git/blob/6ff391324d2d3b9f6bfb58e7d16a20be43b47af7:/readline.sh#l29http://www.dest-unreach.org/socat/contrib/socat-secadv9.html
