/usr/bin/gnome-osd-client is in gnome-osd 0.12.2-1.1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 | #! /usr/bin/python
import pygtk; pygtk.require("2.0")
from gnomeosd import client
client.main()
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