I am still really foggy on how to make an array work for me....

I need to take the results of one command, and split it, then do another command on each result. For example:

# list all interfaces that are "up"
ifconfig -l -u

# Let's say I get this as a result:
lo0 en0 en1

#I need to then do this (for any item listed from the previous command):
ipconfig getifaddr lo0
ipconfig getifaddr en0
ipconfig getifaddr en1

# And I need each interface listed separately when all is said and done. Like this:
lo0 127.0.0.1
en0 10.0.0.1
en1 23.45.67.89

why do you need arrays?
you can do it with a loop - something like this - not tested:

#!/bin/ksh

ifconfig -l -u | while read if
do
    echo "${if} $(ipconfig getifaddr ${if})"
done

#!/bin/ksh

for if in $(ifconfig -l -u)
do
    echo "${if} $(ipconfig getifaddr ${if})"
done

OK, the second one works, except I can't seem to getifaddr on lo0, I need to be able to list all interfaces, except lo0

Oh, and how can I get each interface listed on it's own line?

Thanks!

#!/bin/ksh

for if in $(ifconfig -l -u | grep 'lo0')
do
    echo "${if} $(ipconfig getifaddr ${if})"
done

Originally Posted by TheCrunge Oh, and how can I get each interface listed on it's own line?

Yep, the grep (or grep -v) doesn't work, not sure why.

As far as being on their own line, they are.

The only problem is however, that I was trying to put the whole statment into a variable, like this:

interfaces=`(for if in $(ifconfig -l -u)
do
    echo "${if} $(ipconfig getifaddr ${if})"
done)`

# here's the result from your code:
get if addr lo0 failed, (os/kern) failure
lo0 
en0 205.139.21.89
en1 10.0.1.25

# Now I need to be able assign each line to a variable, so ultimately I get something like this:
Ethernet: 205.139.21.89
Airport: 10.0.1.25

do you have a file mapping 'en0' and '205.139.21.89' TO 'Ethernet'
'en1' and '10.0.1.25' TO 'Airport'

?

How would you do that mapping?