PREIN

/bin/sh

getent group znc >/dev/null || groupadd -r znc
getent passwd znc >/dev/null || \
    useradd -r -g znc -d /var/lib/znc -s /sbin/nologin \
    -c "Account for ZNC to run as" znc
mkdir -p /var/lib/znc
chown znc:znc /var/lib/znc
#exit 0

PREUN

/bin/sh

/usr/share/rpm-helper/del-service znc $1 znc

POSTIN

/bin/sh

/usr/share/rpm-helper/add-service znc $1 znc