Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!uwvax!tank!mimsy!chris
From: chris@mimsy.UUCP (Chris Torek)
Newsgroups: comp.unix.questions
Subject: Re: ed & redirected input
Message-ID: <17520@mimsy.UUCP>
Date: 16 May 89 01:00:47 GMT
References: <9700003@osiris.cso.uiuc.edu>
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 29

In article <9700003@osiris.cso.uiuc.edu> funk@osiris.cso.uiuc.edu writes:
[the important lines ...]
>ed $i <<honker
>1,\$ s/pat1/$site/g
>1,\$ s/pat2/$cmty/g
>w
>q
>honker

>It works like a champ EXCEPT if one of the files (say file2) does NOT contain
>an occurrence of pat1. ...
>          HOWCUM????  

On an error (such as `no matches') ed discards pending input, making
EOF the next thing it sees.  (You could remove the `q' command and
you would see the same behaviour.)

There is a simple work-around:

	ed - $i << end
	g/pat1/s//$site/g
	g/pat2/s//$cmty/g
	w
	end

(the `-' suppresses the two number-of-characters reports).
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7163)
Domain:	chris@mimsy.umd.edu	Path:	uunet!mimsy!chris