Re: Using $PROMPT_COMMAND to beep depending on success/failure

Tim, thanks.  I have an application in mind for this.
What I've been doing so far to test network connected status was:
ping -c 5 www.google.com|grep %
That returns a line of output giving packet thruput statistics and if I 
have 0 percent packet loss I know my network is up.  I just need to 
figure out how to itegrate this.

On Wed, 20 Apr 2016, Tim Chase wrote:

> Date: Wed, 20 Apr 2016 14:41:11
> From: Tim Chase <[email protected]>
> Reply-To: Linux for blind general discussion <[email protected]>
> To: Linux for blind general discussion <[email protected]>
> Subject: Using $PROMPT_COMMAND to beep depending on success/failure
> 
> Stumbled on this one today thanks to @climagic on Twitter.  If you
> want to have your machine give you one tone if the previous command
> succeeded (had an exit-status of 0) and a different tone if the
> previous command failed (had a non-zero exit status), you can put the
> following one-liner in your .bashrc file:
>
> PROMPT_COMMAND='[ "$?" == 0 ] && play -qn synth sin F3 trim 0 0 0.1
> fade 0 0.1 0.05 vol 0.2 || play -qn synth square F4 trim 0 0.1 fade 0
> 0.1 0.05'
>
> This uses the `play` command from the `sox` package.  There are a
> number of tweaks you can make to change the tones, timbres,
> wave-form, volume, duration, etc.  The above uses an F3 sine-wave at
> 20% volume for success and an F4 square-wave at 100% volume for
> failure.
>
> To test it out, use the `true` and `false` commands (they don't do
> anything other than exit with a particular zero/non-zero exit code).
>
> But here's hoping someone here finds it useful.
>
> -tim
>
>
>
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