обзор очередей сообщений POSIX (overview of POSIX message queues)
Примечание (Note)
System V message queues (msgget(2), msgsnd(2), msgrcv(2), etc.)
are an older API for exchanging messages between processes.
POSIX message queues provide a better designed interface than
System V message queues; on the other hand POSIX message queues
are less widely available (especially on older systems) than
System V message queues.
Linux does not currently (2.6.26) support the use of access
control lists (ACLs) for POSIX message queues.