PREIN

/bin/sh

getent group nsd >/dev/null || groupadd -r nsd
getent passwd nsd >/dev/null || \
useradd -r -g nsd -d /etc/nsd -s /sbin/nologin \
-c "nsd daemon account" nsd
exit 0

PREUN

/bin/sh

if [ $1 -eq 0 ]; then
        /sbin/service nsd stop 
        /sbin/chkconfig --del nsd 
fi

POSTIN

/bin/sh

/sbin/chkconfig --add nsd

POSTUN

/bin/sh

if [ "$1" -ge "1" ]; then
  /sbin/service nsd condrestart 
fi