msgget
msgget KEY,FLAGS
Calls the System V IPC function msgget(2). Returns the message queue id, or undef on error. See also SysV IPC in perlipc and the documentation for IPC::SysV and IPC::Msg .
Portability issues: msgget in perlport.
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https://perldoc.perl.org/5.22.0/functions/msgget.html