[mythtv-users] mythpowerbutton.sh improvements

[Tom Lichti]

I don't know about anyone else, but I have had a few issues with my wife 
and daughter hitting the 'POWER' button to exit Myth (which I have setup 
using Jarod Wilson's mythpowerbutton.sh script) while watching Live TV. 
The problem is, this usually causes the backend to continue recording 
Live TV, even though no-one is actually watching it. As you know, this 
is not good, and the easiest fix is to restart the backend, but that's 
not always so simple, especially if you are recording something that you 
actually want on another tuner. Anyway, to cut to the chase, I created 
an Expect script that telnets into the frontend, stops playback, and 
then kills Myth. I am sharing it in case anyone else can benefit from it.

Tom

The revised mythpowerbutton.sh:

#!/bin/bash
PROG=mythfrontend
STATUS=`ps -e | grep $PROG | grep -v grep | wc -l | awk '{print $1}'`
if [ `echo $DISPLAY | grep -c ":0"` -ge 1 ]
then
    if [ $STATUS -eq 0 ]
    then
        ( $PROG > /var/log/mythfrontend.log & )
    else
        /usr/bin/expect /usr/local/bin/stopmythplayback.exp
        sleep 3
        killall $PROG
    fi
fi
exit 0

And the expect script:

#!/usr/bin/expect -f

set force_conservative 0  ;# set to 1 to force conservative mode even if
                          ;# script wasn't run conservatively originally
if {$force_conservative} {
        set send_slow {1 .1}
        proc send {ignore arg} {
                sleep .1
                exp_send -s -- $arg
        }
}

set timeout -1
spawn telnet localhost 6546
match_max 100000
expect -- "# "
send -- "play stop\r"
expect -- "# "
send -- "exit\r"
expect eof