On Fri, Mar 25, 2011 at 11:56:51PM +0530, Rony wrote: > On Friday 25 March 2011 05:56 PM, Binand Sethumadhavan wrote: > > 2011/3/25 Rony Bill<[email protected]>: > >> if > >> grep -q "$USER" present > >> then > >> echo "Sorry! You have already logged in today." > > I have several comments on style and other issues, but this snippet is > > plain buggy. Imagine two users, prabhakaran and karan. If the former > > has marked his attendance, this code will not allow the latter to do > > so at all. > > > > > I created a test script like the above > > #!/bin/bash > > echo -n "Please enter your name: " > read -e USER > if grep -q "$USER" namelist > then echo $USER > else > echo "Name does not exist" > fi > > In namelist file I added Rony, Macrony and karan. > > While both rony and Rony are accepted, for the other 2 names they are > even case sensitive and do not accept macrony or Karan. Even prabhakaran > and karunakaran are rejected. Why rony is not case sensitive is still a > mystery.
I've heard that awk is very good at these text things. Ever gave it a try? I don't know much about it, just giving a hint. Btw, there is this string of tutorials on awk at bashshell.net starting with: http://bashshell.net/stream-filtering-utilities/exercise-1-learning-awk-basics/ -- Regards, Nitesh Mistry | www.mistrynitesh.com PGP key id: A6FEF696 | 'geekosopher' on freenode irc
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