[mythtv-users] Remotely monitor Backend is running

[Barry Martin]

Hi Folks!


Trying to create a script to let me know when my MythTV Backend is not 
running. What I have works, but apparently only if totally off-line (as 
in off). This morning not quite sure what happened but the Frontend 
could not find the Backend (glanced at the screen, knew it was a BE 
issue). Accessing the webpage (Firefox to 192.168.4.3:6544) the “last 
10” rotating display was not present, fairly certain the ‘Current Tuner 
Activity” listing was present; ‘Frontend Status” was definitely present. 
(Probably unnecessary information, but in case help….)


What I current have follows; cron on the computer my rump is usually in 
front of has a script which inquires the Backend every 15 minutes during 
the day. If no problem no notification; if there is a problem a popup 
appears on my screen. Works if the MythTV is totally off, but did not 
notify with the above situation. I also prefer the pop-up over an e-mail 
notification.


The nitty-grity so far:


The Backend is at 192.168.4.3.


crontab on my computer:


# Test Backend 3 (BE3) is on-line every 15 minutes from 6:00 a.m. to 
7:45 p.m.

# The script does not display except with a problem

*/15 07-19 * * * export DISPLAY=:0 && /bin/sh '/home/barry/MythTV 
Backend Scripts/Test_BE3.sh'


==> barry at NZXT:~$ cat '/home/barry/MythTV Backend Scripts/Test_BE3.sh'

#!/bin/sh


# Test Backend 3 (BE3) 192.168.4.3

#

# Test cmd line for make appear off-line: search for " nc -z "

#

#####################################################################

# Create variables

current_date_time=$(date)


#####################################################################

# Test connection -- port 6544 is default -- use 8080 for off-line test

nc -z 192.168.4.3 6544

if [ $? -eq 0 ]

then

echo "BE3 is up."

else

echo "exit status is $?."

echo "BE3 192.168.4.3:6544 down."

Err_BE3_1="Oh-oh!! MythTV Backend 3 (BE3 - 192.168.4.3) is down! "

# XMsg_Size=" -fn '-*-*-*-r-*--0-150-0-0-p-*-iso8859-1'"

# Why this works in one script and not another -- bug

# XMsg_Size=" -fn '-*-*-*-r-*--0-200-0-0-p-*-iso8859-1'"

# echo "$current_date_time\n $Err_BE3_1\n" | xmessage $XMsg_Size -file -

echo "$current_date_time\n $Err_BE3_1\n" | xmessage -fn 
'-*-*-*-r-*--0-200-0-0-p-*-iso8859-1' -file -


fi


exit



I don’t know what netcat’s -z switch does – saw it when cookbooking 
another project and seemed to do what I needed. ..Something about not 
sending data (which is probably good as I saw something about a lot of 
pings could lock up MythTV).


Thanks!

Barry



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