msgsid1

msgget(1) allocate a System V IPC message queue msgread(1) reads the state of a message queue msgwrite(1) writes a message to a message queue msgperm(1) read and optionally alter the permissions for a message queue msgsid(2) find the sid associated with a message queue

msgget(1) allocate a System V IPC message queue msgperm(1) read and optionally alter the permissions for a message queue msgread(1) reads the state of a message queue msgwrite(1) writes a message to a message queue