Re: [Help-bash] A do nothing function

[Greg Wooledge]

On Thu, Sep 27, 2012 at 03:35:51PM -0600, Bob Proulx wrote:
>   filter=cat
>   if [ -f tun0.net ]; then
>     filter="sed /^eth/d;/^wlan/d;/^NetworkManager/d"
>   fi
>   RSLVCNFFILES="$(/lib/resolvconf/list-records | $filter | sed -e '/^lo$/d' 
> -e '/^lo[.]/d')"

Using a function would be more flexible, and less likely to break:

filter() { cat; }
if [ -f tun0.net ]; then
  filter() { sed /^eth/d;/^wlan/d;/^NetworkManager/d; }
fi
RSLVCNFFILES="$(/lib/resolvconf/list-records | filter | ...)"