PREIN
/bin/sh
getent group guacd >/dev/null || groupadd -r guacd &>/dev/null || : getent passwd guacd >/dev/null || useradd -r -s /sbin/nologin \ -d /var/lib/guacd -M -c 'Guacamole proxy daemon' -g guacd guacd &>/dev/null || : exit 0
PREUN
/bin/sh
/usr/share/rpm-helper/del-service guacd $1 guacd
POSTIN
/bin/sh
/usr/share/rpm-helper/add-service guacd $1 guacd