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Perl in a Nutshell

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Standard Modules
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stat

$ds = $sem->stat

Returns an object of type IPC::Semaphore::stat (which is a subclass of Class::Struct) that provides the following fields:

uid    gid    cuid    cgid
mode   ctime  otime   nsems


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Reference: setvalBook Index8.100 IPC::Semaphore