Date: Tue, 27 Mar 2001 00:21:51 -0800 (PST) From: "Rodney W. Grimes" <freebsd@gndrsh.dnsmgr.net> To: mikel@ocsinternet.com (Mikel) Cc: johnny.dang@johnnydang.net (Johnny Dang), FREEBSD-IPFW@FreeBSD.ORG (FreeBSD IpFW) Subject: Re: Scripting with IPFW Message-ID: <200103270821.AAA90749@gndrsh.dnsmgr.net> In-Reply-To: <3ABFB6CB.4A876CC2@ocsinternet.com> from Mikel at "Mar 26, 2001 04:38:19 pm"
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> Hey man cool, hope you don't mind I had to try your script out and well I came > up with this...thanks for sending back the code byte... > > #!/bin/sh > > oif=`ifconfig fxp0 |grep inet | head -1 | awk '{print $2}'` Obviosly people have totally forgotten how to program in the language of awk, so instead use 2 other tools to do what could be done much cleaner: oif=`ifconfig fxp0 | awk '/inet/ {print $2; exit}'` Remeber, that grep X | awk 'foo' can almost always be rewritten in a cleaner style as simply awk '/X/ foo'. > omask=`ifconfig fxp0 |grep inet | head -1 | awk '{print $4}'` > iif=`ifconfig rl0 |grep inet | head -1 | awk '{print $2}'` > imask=`ifconfig rl0 |grep inet | head -1 | awk '{print $4}'` The also seemed to have forgotten about doing common value replacement by variables (fxp0 and rl0 should be replaced by $something, which I would have called $iif, but that is in use for something I would have called $iip). New code: oif=fxp0 iif=rl0 oip=`ifconfig ${oif} | awk '/inet/ {print $2; exit}'` omask=`ifconfig ${oif} | awk '/inet/ {print $4; exit}'` iip=`ifconfig ${iif} | awk '/inet/ {print $2; exit}'` imask=`ifconfig ${iif} | awk '/inet/ {print $4; exit}'` onet=`cidr -q ${oif} -h ${omask} | awk '/network/ {print $3}'` inet=`cidr -q ${iif} -h ${imask} | awk '/network/ {print $3}'` > > onet=`cidr -q ${oif} -h ${omask} | grep network | awk '{print $3}'` > inet=`cidr -q ${iif} -h ${imask} | grep network | awk '{print $3}'` > > echo "onet=\"${onet}\"" > echo "oif=\"${oif}\"" > echo "omask=\"${omask}\"" > echo > echo "inet=\"${inet}\"" > echo "iif=\"${iif}\"" > echo "imask=\"${imask}\"" > > > Cheers, > Mikel > > PS: cidr is a neat little util found in /usr/ports/net/cidr > > > Johnny Dang wrote: > > > Thanks you all (especially UNIX, SCANNER, Mikel, and Scott)... That is why > > this FreeBSD is great... This line will do it (I can now base on this and > > change to fix my need)... > > > > ifconfig de0 | grep "inet" | head -1 | awk '{print $2}' > > > > Thanks to you all... But why the orginal commands from Linux won't work on > > FreeBSD? > > > > ifconfig de0 | grep "inet" | cut -d -f2 | cut -d " " -f1 ? > > > > Just for curiosity? Btw, I download the new RedHAT Wolverines and Mandrake > > 8.0 and those GUI look like Lindows now. But my boss likes it !!!!! > > > > ++++++++++++++++++++++++++++++++++++++++++++++++++ > > "The instructions said to use Windows 98 or better, > > so I installed FreeBSD...It is working now!..." > > ++++++++++++++++++++++++++++++++++++++++++++++++++ > > Johnny Dang <Johnny.Dang@johnnydang.net> > > Senior Network Engineer/MCSE + Internet > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-ipfw" in the body of the message > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-ipfw" in the body of the message > -- Rod Grimes - KD7CAX @ CN85sl - (RWG25) rgrimes@gndrsh.dnsmgr.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-ipfw" in the body of the message
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