PREIN

/bin/sh

getent group cgred >/dev/null || groupadd -r cgred

PREUN

/bin/sh

/usr/share/rpm-helper/del-service libcgroup $1 cgconfig 
/usr/share/rpm-helper/del-service libcgroup $1 cgred

POSTIN

/bin/sh

/usr/share/rpm-helper/add-service libcgroup $1 cgred 
/usr/share/rpm-helper/add-service libcgroup $1 cgconfig