Re: Get IP
Re: Get IP
- Subject: Re: Get IP
- From: Ian Mcginley - Systems Support Engineer <email@hidden>
- Date: Mon, 27 Oct 2003 08:33:33 +1100
Well Somewhere long the lines someone messed up my do shell script which
you are quoting.
the grep 'inet' section will machine both your inet and inet6 (IPv6)
addresses. As IPv6 is (typically) a derivative of your MAC address (or
ethernet address) then it is static whether your Apple Mac is connected
to the network or not. This is a valid case for both en0 (onboard cable
network) and en1 (airport) connections.
The actual do shell script I instructed was:
do shell script "/sbin/ifconfig en0 | grep 'inet ' | awk '{print $2}'"
Now notice the space after inet in the single quotes. Thats very
important. That means if you look at the ifconfig output for en0 it
won't match inet6 - which grep 'inet' will match.
More importantly, your version of the do shell script does not even need
the single quotes. The quotes were only inserted to make sure that the
space was included in the grep string.
Hopefully that helps with your understanding about what is going on.
Regards,
Ian
DigitEL wrote:
Thanks All for the replies. Sure enough I do have an Airport card
active on my tibook, so I guess its a repeat routine until something
parses out as an octet ip.
On Friday, Oct 24, 2003, at 14:39 America/Vancouver, Jon Pugh wrote:
At 1:13 PM -0700 10/24/03, DigitEL wrote:
(do shell script "ifconfig en0 | grep 'inet' | awk '{print $2}'")
Can someone illuminate why all these shell script calls only work on
my machine if set to 'en1'?
Using 'en0' brings back a lot of info but does not contain a IP
addresses.
There are a number of Ethernet interfaces on each machine. There's
the built-in Ethernet, and the airport Ethernet. If you add Ethernet
cards, you'll get en2, en3, etc.
Of course, the assignment of en0, en1, etc. is arbitrary, or at least
controlled by what network setup the user has defined and is using.
For example, both en0 and en1 are active on my machine currently, but
when used in the office, the wired Ethernet is active and at home the
wireless Ethernet is active.
So, you probably should check them all until you get one that is
working.
Jon
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Thanks
EL
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--
Ian McGinley
Systems Support Engineer
Sun Microsystems Australia
476 St Kilda Road - Melbourne - Australia - 3004
Ph: (03) 8866 6360 Email: email@hidden
UNIX is user-friendly, it is just picky about its friends
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| References: | |
| | >Re: Get IP (From: DigitEL <email@hidden>) |