Named Pipes (FIFOs)

Named pipes (FIFOs) are similar to unnamed pipes except they are associated with a file system entry that allows unrelated processes to find and open a named pipe for communication. Discretionary and mandatory access controls are enforced when the named pipe is opened and FIFO special file created based on the named pipe's permission bits and sensitivity label.

The sensitivity label of the process writing the data is associated with each byte of data send down the pipe. The mandatory access policy for writing to and reading from a named pipe is read-equal and write-equal. See the appropriate man page for specific information on security policy and applicable privileges.