PREIN

/bin/sh

/usr/sbin/groupadd -r asterisk &>/dev/null || :
/usr/sbin/useradd  -r -s /sbin/nologin -d /var/lib/asterisk -M \
                               -c 'Asterisk User' -g asterisk asterisk &>/dev/null || :

PREUN

/bin/sh

if [ "$1" -eq "0" ]; then
        # Package removal, not upgrade
        /sbin/service asterisk stop > /dev/null 2>&1 || :
        /sbin/chkconfig --del asterisk
fi

POSTIN

/bin/sh

/sbin/chkconfig --add asterisk