7.9. pipe: Sending messages to named pipes The syslog-ng Premium Edition 7 Administrator Guide
pipe() driver sends messages to a named pipe like
The pipe driver has a single required parameter, specifying the filename of the pipe to open. The filename can include macros. For the list of available optional parameters, see Section 7.9.1, pipe() destination options.
Starting with syslog-ng PE 3.0.2, pipes are created automatically. In earlier versions, you had to create the pipe using the mkfifo(1) command.