PREUN

/bin/sh

/usr/share/rpm-helper/del-service virtualbox $1 vboxadd-timesync

POSTIN

/bin/sh

/usr/share/rpm-helper/add-service virtualbox $1 vboxadd-timesync 

/usr/share/rpm-helper/add-group virtualbox 1 vboxsf

POSTUN

/bin/sh

/usr/share/rpm-helper/del-group virtualbox 1 vboxsf