csh use of grep | tr commands

[Arthur Chance]

On 10/08/2020 01:34, Ernie Luzar wrote:
> Double quotes are giving me trouble.
> 
> I have a file with a line in it like this
> ip4="10.111.098.2"
> I want to get just the ip address
> 
> ip=`grep "ip4=" directory-path/file-name
> 
> $ip ends up having ip4="10.111.098.2"  in it
> 
> ip=`echo -n "${ip}" | tr -d "ip4="
> 
> $ip ends up having "10.111.098.2"  in it
> 
> Putting | tr """ " "` after the echo above gives error.
> 
> How do I remove the " around the ip address?

Provided you're using sh (or bash) for your script

eval $(grep -e '^ip4=' /path/name)

will set the variable ip4 to the address. Try echo $ip4 afterwards to see.

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