os_sup(3erl) on Linux
The text 686d796ad764, as Debian 3.1 (Sarge) shipped it.
This module, together with some dedicated UNIX processes, implements a message passing service from the Solaris operating system to the error logger in the Erlang runtime system. The Solaris (SunOS 5.x) messages are retrieved from the syslog-daemon, syslogd.