required, it can be deleted using mq_unlink (3). Queue attributes can be retrieved ... mq_timedsend(3) mq_timedsend(2) mq_unlink(3) mq_unlink(2) Versions POSIX messagemq_receive () mq_send () mq_setattr () mq_unlink () MON - _POSIX_MONOTONIC_CLOCK - _SC_MONOTONIC_CLOCK