Date: Tue, 27 Mar 2001 09:46:17 -0500 From: Mikel <mikel@ocsinternet.com> To: "Rodney W. Grimes" <freebsd@gndrsh.dnsmgr.net> Cc: Johnny Dang <johnny.dang@johnnydang.net>, FreeBSD IpFW <FREEBSD-IPFW@FreeBSD.ORG> Subject: Re: Scripting with IPFW Message-ID: <3AC0A7B9.4E3DF96D@ocsinternet.com> References: <200103270821.AAA90749@gndrsh.dnsmgr.net>
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Thankfully Philip kindly pointed out the awk syntax 11 hours prior and I took a few minutes to rewrite the little play script to be exactly as you have presented here, only I didn't feel it was worth reposting wasted bw. What would have been nice for those of us who have only just started playing with awk; would have been to have some one suggest a code byte on how to have this thing automagickally grab the interface name from ifconfig. "Rodney W. Grimes" wrote: > > 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 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-ipfw" in the body of the message
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