Communications Technical Reference, Volume 2 putpmsg System Call Purpose Sends a priority message on a stream. All information except for flag settings are found in the description for the putmsg system call. The differences in the flag settings are noted in the error codes section.
Parameters fd Specifies a file descriptor referencing an open stream.
Holds the control part of the message. Holds the data part of the message. Sends a priority message. The poll subroutine, read subroutine, write subroutine. The getmsg system call, getpmsg system call, putmsg system call.