Path: utzoo!attcan!uunet!wotk!root
From: root@wotk.UUCP (Superuser)
Newsgroups: comp.protocols.tcp-ip
Subject: detecting peer close()
Keywords: socket tcp close
Message-ID: <10@wotk.UUCP>
Date: 7 Aug 90 19:15:28 GMT
Organization: World-Wide Technology
Lines: 19

I have a BSD 4.3 tahoe system and I have the source code.

If I have a connected socket connection, how can I tell
when the other end has done a close()?

As best as I can tell from the source, the bit in so_state
represented by SS_ISCONNECTED is toggled off. Since I have
source is it fair to just check this bit?

Also I am doing non-blocking i/o with read. Would read()
return 0 when the other end closes or -1 with errno set?

Thanks,

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