Path: utzoo!attcan!utgpu!watserv1!watmath!att!emory!swrinde!zaphod.mps.ohio-state.edu!mips!ultra!wayne
From: wayne@ultra.com (Wayne Hathaway)
Newsgroups: comp.protocols.tcp-ip
Subject: BSD sockets question
Summary: shutdown(2) == close()?
Keywords: sockets, shutdown, close
Message-ID: <1990Dec7.172324.4260@ultra.com>
Date: 7 Dec 90 17:23:24 GMT
Reply-To: wayne@ultra.com (Wayne Hathaway)
Distribution: na
Organization: Ultra Network Technologies
Lines: 23

Sorry to bother the TCP/IP group with a BSD-sockets-specific question, 
but it really does relate to protocol behavior.

Anyway, my question is the following:  For connected stream sockets,
are there ANY semantic differences between shutdown(2) and close()?
If so, can somebody please explain them?  (For example, if multiple
processes are sharing a connected socket, only the LAST close() will
have an effect; is this true with shutdown(2)?  Is "data in the pipe"
treated any differently?  Etc ...)

Oh, when I say "shutdown(2)" I mean the shutdown() system call with
a "how" parameter of "2," meaning shutdown both read and write; I am
NOT alluding to section 2 of the manual.

Thanks muchly!

    Wayne Hathaway               domain: wayne@Ultra.COM
    Ultra Network Technologies     uucp: ...!ames!ultra!wayne
    101 Daggett Drive             phone: 408-922-0100 x132
    San Jose, CA 95134           direct: Hey, you!

PS:  For that matter, can anybody explain what shutdown does with a
     connected DATAGRAM socket?  Thnx again.