#!/bin/bash
# Script designed to run in the background
# Monitors to ensure backend hasn't clogged up resulting in a "MythTV is Idle"
# in MythWelcome with no countdown to shutdown
# Checks (1) if MythFrontend is closed, and (2) mythshutdown --check returns 0 (otherwise idle)
# Essentially it is manually running what MythWelcome should take care of when the backend
# sends the right signal

# get some pretty date stuff
# and set the exit state to default 0, or force shutdown
mdy="`date +%Y-%m-%d`"
hm1="`date +%T`"
hm2="`date +%N | cut --bytes='1 2 3'`"
hms="$hm1.$hm2"
echo "$mdy $hms backendmonitor: TEST TOP!" >> /var/log/mythtv/mythpreshutdown.log

initval=7m

sleep $initval

# Set sleep large enough so it allows regular countdowns to occur without constantly restarting backend
# (at least 2X the countdown time)
sleeptimer=7m

echo "$mdy $hms backendmonitor: STARTING UP! (timer=$sleeptimer)" >> /var/log/mythtv/mythpreshutdown.log

while [ 1 ]; do   # Run forever

mdy="`date +%Y-%m-%d`"
hm1="`date +%T`"
hm2="`date +%N | cut --bytes='1 2 3'`"
hms="$hm1.$hm2"

#Clear flags
reloadflag=0
frontendflag=0
builtincheck=0

# Execute mythfrontend check
frontendflag=`ps axu | grep -c 'mythfrontend'`
frontendflag=$[$frontendflag-1]

# Execute built in mythshutdown check command
/usr/bin/mythshutdown -c
builtincheck=$?


# Run check if it should reload
if [[ $builtincheck -eq 0 && $frontendflag -eq 0 ]]; then
        reloadflag=1
fi

echo "$mdy $hms backendmonitor: Frontendflag = $frontendflag, Builtincheck = $builtincheck , ReloadFlag = $reloadflag" >> /var/log/mythtv/mythpreshutdown.log

# Reload backend if necessary
if [ $reloadflag -eq 1 ]; then
        echo "$mdy $hms backendmonitor.sh:      Restarting backend because it may have paused up" >> /var/log/mythtv/mythpreshutdown.log
        /etc/init.d/mythtv-backend restart
        reloadflag=0
        sleep $sleeptimer       # Wait some time to allow for real restart
fi

sleep $sleeptimer
echo "$mdy $hms backendmonitor: Checked ... (timer=$sleeptimer)" >> /var/log/mythtv/mythpreshutdown.log

done