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Old 06-09-2003, 07:03 PM   #1
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Registered: Nov 2001
Location: Budapest, Hungary
Distribution: SuSE 6.4-11.3, Dsl linux, FreeBSD 4.3-6.2, Mandrake 8.2, Redhat, UHU, Debian Etch
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How to find out dynamic IP address in a script?

I am writing a script, which should somehow find out what dynamic IP address is assigned to the local machine.
Is there an easy and generic way (say... checking an environment variable?) to find it?

I know ifconfig shows the IP address, but I found it hard to find a common way to grep it out, since the list has a different structure on the two unixes I have access to.
I also know that it may be found (and easily grepped out) in /var/log/messages, but I do not know if it is always there.
So, is there an other solution?
Old 06-09-2003, 08:13 PM   #2
Registered: Feb 2002
Location: Fairfax, VA
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you can parse the dhcpclient-ethX.leases file. if the client gets an ip it will be written in that file.

the file is in /var/lib/dhcp/


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