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Re: [Help-bash] eth0 up or down?

From: Pierre Gaston
Subject: Re: [Help-bash] eth0 up or down?
Date: Sun, 23 Apr 2017 16:35:19 +0300

On Sun, Apr 23, 2017 at 8:08 AM, Mike McClain <address@hidden>

> Howdy,
>     How can I tell from bash whether eth0 is up or down that would be
> faster or less expensive than $(ifconfig eth0;)? Is there some where
> in /proc or elsewhere in memory a bash program can reach?
>     Thanks for your thoughts,
> Mike
> --
> A wise man will make more opportunities than he finds.
>     - Francis Bacon
You don't mention the OS you are targeting,  you might be able to do
something like: $(</sys/class/net/eth0/operstate).
Though if you are not running this in a quick loop the price you pay for a
fork is probably not a problem

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