PREIN

/bin/sh

# Add the "mythtv" user
/usr/share/rpm-helper/add-user mythtv $1 mythtv /var/lib/mythtv /sbin/nologin 
/usr/bin/gpasswd -a mythtv audio &>/dev/null
/usr/bin/gpasswd -a mythtv video &>/dev/null

PREUN

/bin/sh

/usr/share/rpm-helper/del-service mythtv $1 mythbackend

POSTIN

/bin/sh

/usr/share/rpm-helper/add-service mythtv $1 mythbackend

POSTUN

/bin/sh

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