The syslog-ng 3.0 Administrator Guide

The pipe driver opens a named pipe with the specified name and listens for messages. It is used as the native message delivery protocol on HP-UX.

The pipe driver has a single required parameter, specifying the filename of the pipe to open. For the list of available optional parameters, see Section 8.1.3, “pipe()”.

Declaration:
                pipe(filename);

	Note
	As of syslog-ng Open Source Edition 3.0.2, pipes are created automatically. In earlier versions, you had to create the pipe using the mkfifo(1) command.

Pipe is very similar to the file() driver, but there are a few differences, for example pipe() opens its argument in read-write mode, therefore it is not recommended to be used on special files like /proc/kmsg.

	Warning
	It is not recommended to use pipe() on anything else than real pipes.

	Example 3.11. Using the pipe() driver
	source s_pipe { pipe("/dev/pipe" pad_size(2048)); };