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From: ok@cs.mu.oz.au (Richard O'Keefe)
Newsgroups: comp.unix.wizards
Subject: Re: YP answer (was Re: awk and shell question)
Keywords: awk sh
Message-ID: <2139@munnari.oz.au>
Date: 19 Sep 89 09:45:29 GMT
References: <1163@ispi.UUCP> <2412@netcom.UUCP> <2130@munnari.oz.au> <124894@sun.Eng.Sun.COM>
Sender: news@cs.mu.oz.au
Lines: 14

In article <124894@sun.Eng.Sun.COM>, limes@ouroborous.Eng.Sun.COM (MIDI Apprentice) writes:
: In article <2130@munnari.oz.au> ok@cs.mu.oz.au (Richard O'Keefe) writes:
: >Again, watch out for Yellow Pages; if you're using that you have to do
: >	ypcat passwd | grep "^${LOGNAME}" | what-ever-you-want-here

: Assuming that a YP lookup operation is more efficient then doing a YP
: database dump and grovelling through it with grep, the following will
: probably be somewhat faster (my passwd map is around 2500 entries):
: 	ypmatch $LOGNAME passwd | cut -f5 -d:

My point was to _beware_ of Yellow Pages.
The manual page says of ypmatch that "No pattern matching is available".
If you're looking for an exact match, ypmatch is fine.  For anything else,
ypcat | grep is the way to go.