From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Tue, 19 Jun 2007 12:13:47 -0400
From: Kris Maglione <bsdaemon@comcast.net>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] equivalent of fstat | grep $portnumber ?
Message-ID: <20070619161347.GA67517@kris.home>
References: <20070619152735.GB6960@pestilenz.org>
	<b8236d78be4464c22952d151831a5759@9netics.com>
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On Tue, Jun 19, 2007 at 08:39:24AM -0700, Skip Tavakkolian wrote:
>cpu% netstat | grep https
>tcp  25   none       Listen       https      0          ::
>cpu% grep '/net/tcp/25' /proc/*/fd
>/proc/8429/fd: 13 rw I    0 (000000000002040c     0 00)     0        2 /ne=
t/tcp/25/listen
>cpu% ps -eaf|grep 8429
>none           8429    0:00   0:00     1404K Pread    httpd ?
>fst           17202    0:00   0:00      156K Pread    grep 8429
>cpu%=20

I don't think that helps. As he said, you usually just see the open=20
clone file for apps which are listening. The open on the listen file=20
doesn't return until there's an incoming connection, so it's only ever=20
visible for programs with active incoming connections.  There might be a=20
simpler (and faster) way, but something like this will probably get you=20
what you want:

#!/bin/rc

port =3D $1

cd /net/tcp
c =3D `{grep -l !$port'$' */local | sed 's,/.*,,'}
l =3D `{grep -l '^Listen' $c^/status | sed 's,/.*,,'}
q =3D `{du -q $l^/ctl | awk '{print $1}'}

grep -l -e^$q /proc/*/fd | awk -F/ '{print $3}'

--=20
Kris Maglione

People to whom you are attracted invariably thing you
remind them of someone else.

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