From: Patton, Tony (Tony.Patton at domain NWIFHE.AC.UK)
Date: Mon 10 Sep 2001 - 17:20:25 IST
there is no plan to upgrade anytime soon.
the reason that i am looking to do this is that we have a lot of users
who connect to an oracle database over telnet and print by going thru a
menu of printers.
this list is getting crowded, (about 8 or so), so i want to provide
different menus for the users depending on their ip address. ie
172.200.20.x = mis printers, 172.200.30.x = administration printers.
-----Original Message-----
From: Chris Higgins [mailto:chris.higgins at domain horizon.ie]
Sent: Monday, September 10, 2001 4:53 PM
To: Irish Linux Users Group (E-mail)
Subject: Re: [ILUG] grep or awk
We're talking about the contents of the wtmp/utmp files, as interpreted
by
the command 'who'
If you upgrade your version of who, and the formatting changes slightly,
you run the risk of breaking your scripts (in strange and wonderful
ways).
Would it not make more sense to query the files directly so that
you can be sure that the information is more reliable than grep'ing
from 'who'
Chris (just my e0.02) - (see: man utmp)
> Fergal Daly wrote:
> > sed 's/.*(\(.*\)).*\|.*/\1/'
> >
> > will turn lines that don't have a matching pair of brackets into
blanks,
> >
> > > > xxxxxxx ttyqb Sep 10 11:33
> > > > (xxx.xxx.xxx.xxx)
>
> I think
> sed -e 's/^[^(]*(\([^)]*\)).*$/\1/'
> is slightly better, in that it will pick up the first matching pair of
> brackets, rather than (on this line, say) printing (for example) "on
> this line, say) printing (for example" rather than "on this line, say"
-
> but that's a matter of choice, if you're guaranteed that you'll only
> have one pair of brackets.
>
> Cheers,
> Dave
>
> --
> David Neary, E-Mail dave.neary at domain palamon.ie
> Palamon Technologies Ltd. Phone +353-1-634-5059
>
> --
> Irish Linux Users' Group: ilug at domain linux.ie
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-- ** Chris Higgins e: chris.higgins at horizon.ie ** ** Technical Business Development tel: +353-1-6204916 ** ** Horizon Technology Group fax: +353-1-6204949 ** -- Irish Linux Users' Group: ilug at domain linux.ie http://www.linux.ie/mailman/listinfo/ilug for (un)subscription information. List maintainer: listmaster at domain linux.ie
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