Calls the System V IPC function msgrcv to receive a message from message queue ID into variable VAR with a maximum message size of SIZE. Note that when a message is received, the message type as a native long integer will be the first thing in VAR, followed by the actual message. This packing may be opened withunpack("l! a*"). Taints the variable. Returns true if successful, false on error. See also"SysV IPC" in perlipc and the documentation forIPC::SysV andIPC::Msg.
Portability issues:"msgrcv" in perlport.
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