What is `tty10` used for in syslog-ng

Question

syslog-ng has the option to include a config snippet:

@include "`scl-root`/system/tty10.conf"

and many examples on-line include that file; but I can't understand what it's for?

The entire included file consists of:

@define tty10 "/dev/tty10"

Answer 1

By default, at least in the Debian version of syslog-ng, console output goes to tty10, which is supposed to be the tenth virtual console. The reason tty10 is configured in a separate configuration file is that its value depends on the system; on Linux-based systems, it’s /dev/tty10, on kFreeBSD-based systems, it’s /dev/ttya. The package build process picks the appropriate file and installs it.

See README.source for details.