extract IP address and feed it into a command

[DJ Boris]

hi guys,

I would like to thank you for all your help... you pointed me in the right
direction. here is what worked for me:

ifconfig tun0 | grep xxx.x | cut -d " " -f2
ifconfig tun0 | grep xxx.x | awk '/inet/ {print $2}'
ifconfig tun0 | grep xxx.x | awk '{print $2}'

xxx.x - this is the first part of my IP. it always starts with that xxx.x
number. grep gets it from the ifconfig and then all it takes is string
munching...

AND AGAIN - THANK YOU VERY MUCH

dj boris


----- Original Message -----
From: "Christian Stigen Larsen" <csl at sublevel3.org>
To: <freebsd-questions at freebsd.org>
Sent: Tuesday, April 29, 2003 12:31 AM
Subject: Re: extract IP address and feed it into a command


> Quoting DJ Boris (dj_boris at mail.ru):
> | I need to extract my IP address [...] assigned by my ISP [...]
> | I know that my IP always starts with zzz.zzz and if I run
> |
> | "ifconfig | grep zzz.zzz"
>
> >From the top of my head, I don't know any programs that automatically
spits
> out IP addresses.  But you could always combine ifconfig with awk.  Say
the
> interface you need to query is xl0, then you might do:
>
> $ ifconfig xl0 inet | awk '/inet/ {print $2}'
>
> This prints "10.0.0.2", which is the IP assigned to my box by the DHCP
server.
>
> I don't know if this is exactly what you need, but at least it should give
you
> some idea on using awk in such cases.  Play around, and you'll probably
get
> something working (or, possibly, someone else on the list gives you some
> better alternative).
>
> Dig up some info on awk if you've never heard about it before.
>
> --
> Christian Stigen Larsen -- http://sublevel3.org/~csl/ -- mob: +47 98 22 02
15
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