semget(2) - perldoc - phpman

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    semget KEY,NSEMS,FLAGS
            Calls the System V IPC function semget(2). Returns the semaphore
            id, or the undefined value on error. See also "SysV IPC" in
            perlipc and the documentation for "IPC::SysV" and
            "IPC::Semaphore".

            Portability issues: "semget" in perlport.


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