Path: utzoo!utgpu!watmath!clyde!att!ihlpb!gregg
From: gregg@ihlpb.ATT.COM (Wonderly)
Newsgroups: comp.unix.questions
Subject: Re: end of file characters and open file descriptors
Message-ID: <9305@ihlpb.ATT.COM>
Date: 30 Dec 88 19:49:46 GMT
References: <8629@alice.UUCP>
Organization: AT&T Bell Laboratories - Naperville, Illinois
Lines: 19

From article <8629@alice.UUCP>, by ark@alice.UUCP (Andrew Koenig):
> In article <1345@cod.NOSC.MIL>, waagen@cod.NOSC.MIL (Don E. Waagen) writes:
> -> 
> ->    I'm trying to have two processes communicate via a pipe (stdout), like 
> -> 
> -> 			A | B
> -> 
> 
> Sorry, but it's completely impossible in most systems.

True, EOF on a pipe only happens when all read fd's are closed...

An alternative is to send a signal from A to B, interupting the read.
This is not a pretty solution at all, but does provide the necessary
functionality.

-- 
It isn't the DREAM that NASA's missing...  DOMAIN: gregg@ihlpb.att.com
It's a direction!                          UUCP:   att!ihlpb!gregg