From owner-freebsd-questions Sun Jan 5 14:33:56 2003 Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id C557D37B401 for ; Sun, 5 Jan 2003 14:33:54 -0800 (PST) Received: from mailsrv.otenet.gr (mailsrv.otenet.gr [195.170.0.5]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1AC4243E4A for ; Sun, 5 Jan 2003 14:33:52 -0800 (PST) (envelope-from keramida@ceid.upatras.gr) Received: from gothmog.gr (patr530-a231.otenet.gr [212.205.215.231]) by mailsrv.otenet.gr (8.12.6/8.12.6) with ESMTP id h05MXn4V027163 for ; Mon, 6 Jan 2003 00:33:49 +0200 (EET) Received: from gothmog.gr (gothmog [127.0.0.1]) by gothmog.gr (8.12.6/8.12.6) with ESMTP id h05M3lsX002032 for ; Mon, 6 Jan 2003 00:03:47 +0200 (EET) (envelope-from keramida@ceid.upatras.gr) Received: (from giorgos@localhost) by gothmog.gr (8.12.6/8.12.6/Submit) id h05GrE1i000680 for questions@FreeBSD.ORG; Sun, 5 Jan 2003 18:53:14 +0200 (EET) (envelope-from keramida@ceid.upatras.gr) Date: Sun, 5 Jan 2003 18:53:14 +0200 From: Giorgos Keramidas To: FreeBSD Questions Subject: Re: What are the SMTP rules for sending mail to FreeBSD Message-ID: <20030105165314.GA634@gothmog.gr> References: <3E0DBCFC.5040907@quadtelecom.com> <5.1.1.6.2.20021228111607.0243f108@mail.go2france.com> <20021229002511.GD92510@wantadilla.lemis.com> <20021229174612.GR348@freepuppy.bellavista.cz> <20021230005622.GE19243@wantadilla.lemis.com> <20030102154044.GK348@freepuppy.bellavista.cz> <20030102155305.GL348@freepuppy.bellavista.cz> <20030104033246.GC12462@wantadilla.lemis.com> <20030105151622.GC669@freepuppy.bellavista.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030105151622.GC669@freepuppy.bellavista.cz> Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On 2003-01-05 16:16, Roman Neuhauser wrote: > # grog@FreeBSD.org / 2003-01-04 14:02:46 +1030: > > cat > $myfile > > server=`egrep -i < $myfile "In: [HE][HE]LO"|sed 's/^.*LO *//' ` > > if [ "$server" = "" ]; then > > server=`egrep -i < $myfile "^Subject.*errors from "|sed 's/^Subject.*errors from //; s:\[.*::g' ` > > fi > > > > Confusing, isn't it? The thing is, this program is a filter. The > > first line copies stdin to $myfile for future (multiple) readings. > > Ok, so you pipe the Postfix-generated message into B which slurps it > into $myfile and that is where you access it... I'm just a luser, so > excuse me if this is nonsense, but do you do that because stdin is > not seekable? Sort of. Standard input can be seekable. When you redirect it using something like: % blah < filename The blah program can seek its stdin. Pipes on the other hand are not seekable. - Giorgos To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message