Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/3/84; site delftcc.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!bellcore!decvax!decwrl!pyramid!pesnta!phri!delftcc!sam
From: sam@delftcc.UUCP (Sam Kendall)
Newsgroups: net.bugs.usg
Subject: Re: Bug in sed(1)?
Message-ID: <120@delftcc.UUCP>
Date: Fri, 24-Jan-86 21:30:31 EST
Article-I.D.: delftcc.120
Posted: Fri Jan 24 21:30:31 1986
Date-Received: Sun, 26-Jan-86 17:07:56 EST
References: <685@ttrdc.UUCP>
Organization: Delft Consulting Corp., New York
Lines: 24
Summary: A simple workaround

In article <685@ttrdc.UUCP>, levy@ttrdc.UUCP (Daniel R. Levy) writes:
> I have encountered what I THINK is a bug in sed(1)....
> 
> Specifically, it involves expressions of the form '1,/^fixed_pattern$/d'....
> 
> Unfortunately, this seems to fail when the first line of the input exactly
> matches fixed_pattern; then, instead of only the first line of the input
> being discarded, ALL the lines of input are discarded.

As another news item noted, this is documented behavior.  To work around
it, prepend a blank line to the input stream:

	( echo; cat ) | sed '1,/^fixed_pattern$/d'

This does exactly what you want.

I think it is possible to work around this in a single sed process,
using the pattern space, but I the result would be very ugly!

----
Sam Kendall			     allegra \
Delft Consulting Corp.		seismo!cmcl2  ! delftcc!sam
+1 212 243-8700			       ihnp4 /
ARPA: delftcc!sam@nyu.ARPA