# msgctl - perldoc - phpman

    msgctl ID,CMD,ARG
            Calls the System V IPC function [msgctl(2)](https://www.chedong.com/phpMan.php/man/msgctl/2/markdown). You'll probably have
            to say

                use [IPC::SysV](https://www.chedong.com/phpMan.php/perldoc/IPC%3A%3ASysV/markdown);

            first to get the correct constant definitions. If CMD is
            "IPC_STAT", then ARG must be a variable that will hold the
            returned "msqid_ds" structure. Returns like "ioctl": the
            undefined value for error, "0 but true" for zero, or the actual
            return value otherwise. See also "SysV IPC" in perlipc and the
            documentation for "[IPC::SysV](https://www.chedong.com/phpMan.php/perldoc/IPC%3A%3ASysV/markdown)" and "[IPC::Semaphore](https://www.chedong.com/phpMan.php/perldoc/IPC%3A%3ASemaphore/markdown)".

            Portability issues: "msgctl" in perlport.