/usr/share/dbus-1/system-services/com.hp.hplip.service is in hplip 3.14.6-1+deb8u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | [D-BUS Service]
Name=com.hp.hplip
Exec=/usr/bin/hp-pkservice
User=root
|