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# msgctl

Perl 5 version 10.1 documentation
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# msgctl

Perl functions A-Z | Perl functions by category | The 'perlfunc' manpage

- msgctl ID,CMD,ARG

  Calls the System V IPC function msgctl(2). You'll probably have to say

          use IPC::SysV;

  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, `IPC::SysV` , and `IPC::Semaphore` documentation.

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