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Re: Detecting a closed socket

by kschwab (Priest)
on Aug 05, 2003 at 14:06 UTC ( #280982=note: print w/ replies, xml ) Need Help??

in reply to Detecting a closed socket

Using sysread(), your indication that the other end has closed the connection would be a "successful sysread of zero bytes". This works when the other end does an orderly close() or shutdown() of the send side of the socket. So, you would have to test the return value of sysread() for undef (error) and zero( end of file, a.k.a, client closed connection ).

In the event that something unusual happens ( perhaps the client crashed ?), keepalives could be helpful. ($sockobj->sockopt(SO_KEEPALIVE,1);)

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