/usr/share/doc/libapp-daemon-perl/examples/test-daemon is in libapp-daemon-perl 0.22-1.
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 6 7 | #!/usr/bin/perl -w
use strict;
# Program:
use App::Daemon qw( daemonize );
daemonize();
sleep(100);
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