PREIN

/bin/sh

getent group iguanair >/dev/null || groupadd -r iguanair
getent passwd iguanair >/dev/null || \
    useradd -r -g iguanair -d /var/run/iguanaIR -s /sbin/nologin \
    -c "Iguanaworks IR Daemon" iguanair
exit 0

PREUN

/bin/sh

if [ $1 -eq 0 ] ; then
    # Package removal, not upgrade
    /bin/systemctl --no-reload disable iguanaIR.service > /dev/null 2>&1 || :
    /bin/systemctl stop iguanaIR.service > /dev/null 2>&1 || :
fi

POSTIN

/bin/sh

if [ $1 -eq 1 ] ; then
    # Initial installation
    /bin/systemctl daemon-reload >/dev/null 2>&1 || :
fi
/sbin/ldconfig

POSTUN

/bin/sh

/bin/systemctl daemon-reload >/dev/null 2>&1 || :
if [ $1 -ge 1 ] ; then
    # Package upgrade, not uninstall
    /bin/systemctl try-restart iguanaIR.service >/dev/null 2>&1 || :
fi
/sbin/ldconfig