You are not logged in. Please login or register.
I need to check a variable in a shell script to see if it's an ip address. It feels like overkill to create a temporary file for it so I want to check against the variable. Also, it's not that important that it's a valid ip.
The script is in sh (bourne shell) and I'd appreciate all input. However, solutions in other languages i.e. bash or ksh are not of interest.
Thank you!
I was having a brainlock.. to solve the problem I did like this:
echo "$current_ip" |grep -E "^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$"
yeah, you might want to utilize hex/bin or check n<255.
I don't get it man. First you want to check and then you don't care if it's a valid one. What do you mean?
I don't need to check if it's valid since the variable, in this specific case, either is a valid ip address or a handful of error text. So by ruling out text, I sort of validated the results.
Thanks for your input.
Last edited by ibs (2006-09-17 03:08:37)
Powered by PunBB, supported by Informer Technologies, Inc.
Currently installed 2 official extensions. Copyright © 2003–2009 PunBB.
