[LAU] Toggle Jack Transport CLI

[Ralf Mardorf]

On Tue, 15 Nov 2016 21:31:02 +0000, Yassin Philip wrote:
>On 15/11/16 16:08, Jeremy Jongepier wrote:
>> On 11/15/2016 03:19 PM, Yassin Philip wrote:  
>>> But found no way to detect the transport status ; Is there a way to
>>> know it?  
>> I use this very hacky script that I bind to my Play media key (I use
>> openbox for this):
>>
>> ---
>> #!/bin/bash
>>
>> function jack_transport_status() {
>>    jack_showtime | head -n1 & &> /dev/null
>> }
>>
>> if jack_transport_status | grep -q -i stopped
>> then
>>    echo play | jack_transport &> /dev/null
>>    killall jack_showtime
>> else
>>    echo stop | jack_transport &> /dev/null
>>    killall jack_showtime
>> fi
>> ---
>>  
>I can't get it to work, somehow it chokes at the showtime cmd, that 
>refuses to give back the prompt..? I mean, just exec 
>jack_transport_status in the shell should return, right?

jack_transport_status is a function of his script, it quasi is an alias
for jack_showtime | head -n1 & &> /dev/null. Actually you could add an
alias to .bashrc or run from command line

  jack_showtime | head -n1 &

&> /dev/null is the same as  >/dev/null 2>&1 , it redirects STDERR and
STDOUT to /dev/null, IOW all output is invisible.