network script syntax problem

[Ari Moisio]

Hi

The $(...) does not capture stderr output.

Could you use ping exit code directly; it will fail  in it got no 
repllies.


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  Jude DaShiell kirjoitti
> Subject: network script syntax problem
> Date: Fri, 6 Nov 2015 07:08:46 -0500 (EST)
> From: Jude DaShiell <jdashiel at panix.com>
> To: blinux-list at redhat.com
> 
> #!/usr/bin/env bash
> # file: $0 - script to find useable connection on hughsnet.
> let CONNECT=0
> while [ $CONNECT -lt 1 ]; do
>    sudo -H dhcpcd -k 2>&1 >/dev/null
>        sudo -H dhcpcd
> ST=$( ping -c 5 8.8.8.8|tail -2 )
> if [ $ST !='connect: Network is unreachable' ]; then
> CONNECT=CONNECT+1
> fi
> done
>
> The ST variable doesn't capture the search string the if statement is needing 
> to find.  Putting parentheses around a command appears only to capture output 
> of a command and send it to stdout or stderr.  In case of bad network 
> connections this script first kills dhcp then reconnects.  If successful it 
> need only happen once.
>
> --
>
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