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From: wrt@etive.ed.ac.uk (Billy Taylor)
Newsgroups: comp.unix
Subject: Non-blocking IO
Keywords: read, I/O
Message-ID: <973@altos86.UUCP>
Date: 31 Mar 89 03:16:57 GMT
Sender: dtynan@altos86.UUCP
Reply-To: Billy Taylor <mcvax!etive.ed.ac.uk!wrt@uunet.UU.NET>
Organization: Edinburgh University Computer Science
Lines: 14
Approved: dtynan@zorba.Tynan.COM


How can I do a 'read' that works ok except when there's actually nothing
to be read, in which case it returns a -1.

The only success I've had so far end up in any shells I was running getting
sent a sig 20.

I can get it to work under dbx but not in normal usage.

Ta.

Billy Taylor,                           JANET: wrt@uk.ac.ed.etive
Edinburgh University Computing Science  ARPA:  wrt%ed.etive@nss.cs.ucl.ac.uk
                                        UUCP:  ...!uunet!mcvax!ukc!etive!wrt