...isting message queue. This call returns an identifier that is used in the remaining APIs. msgsnd (2) Add a message to a queue. msgrcv (2) Remove a message from a queue. msgctl (…...isting message queue. This call returns an identifier that is used in the remaining APIs. msgsnd (2) Add a message to a queue. msgrcv (2) Remove a message from a queue. msgctl (…...essages. This API is distinct from that provided by System V message queues ( msgget (2), msgsnd (2), msgrcv (2), etc.), but provides similar functionality. Message queues are c…overview of signals NAME signal - overview of signals DESCRIPTION Linux supports both POSIX reliable signals (hereinafter "standard signals") and POSIX real-time signals. Signal di…...getpmsg() lockf() F_LOCK mq_receive() mq_send() mq_timedreceive() mq_timedsend() msgrcv() msgsnd() msync() nanosleep() open() openat() [Added in POSIX.1-2008] pause() poll() pre…