PREIN

/bin/sh

getent group toxiproxy >/dev/null || groupadd -r toxiproxy
getent passwd toxiproxy >/dev/null || \
    useradd -r -g toxiproxy -d /var/lib/toxiproxy -s /sbin/nologin \
    -c "Toxiproxy-server account" toxiproxy
exit 0

PREUN

/bin/sh

 
if [ $1 -eq 0 ] && [ -x /usr/bin/systemctl ]; then 
        # Package removal, not upgrade 
        /usr/bin/systemctl --no-reload disable --now toxiproxy.service || : 
fi

POSTIN

/bin/sh

 
if [ $1 -eq 1 ] && [ -x /usr/bin/systemctl ]; then 
        # Initial installation 
        /usr/bin/systemctl --no-reload preset toxiproxy.service || : 
fi

POSTUN

/bin/sh

 
if [ $1 -ge 1 ] && [ -x /usr/bin/systemctl ]; then 
        # Package upgrade, not uninstall 
        /usr/bin/systemctl try-restart toxiproxy.service || : 
fi