PREIN

/bin/sh

/usr/share/rpm-helper/add-user avahi $1 avahi /var/avahi /bin/false

PREUN

/bin/sh

/usr/share/rpm-helper/del-service avahi $1 avahi-daemon 
if [ $1 = 0 ]; then service messagebus condrestart; fi

POSTIN

/bin/sh

service messagebus condrestart
/usr/share/rpm-helper/add-service avahi $1 avahi-daemon

POSTUN

/bin/sh

/usr/share/rpm-helper/del-user avahi $1 avahi