I want to set SO_RCVTIMEO option for a socket, but a problem is that underlying syscall wants struct timeval and depending on architecture it may be couple of 32-bit or 64-bit integers. So I can use 

$socket->sockopt(SO_RCVTIMEO, pack('LL', $seconds, 0));

[download]
on 32-bit or 
$socket->sockopt(SO_RCVTIMEO, pack('QQ', $seconds, 0));

[download]
on 64-bit.

My question is what is the way to determine if script run on 32-bit or 64-bit OS, and if there's a better way to create this structure?

In reply to setting timeout for a socket by zwon

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