[mythtv-users] Start Mythfrontend if not running?

[nate s]

You can pretty much add however scripting magic you want to , for
whatever your needs (logging, for example,) but basically, what you
need is something like

while true
do mythfrontend
done

You'll have to either alt-tab to the term you ran that in and do ^C or
kill it to exit mythfrontend.

-Nate

On Fri, 17 Dec 2004 12:36:39 -0500, Kyle Rose <krose+mythtv at krose.org> wrote:
> Here's another approach.  Since I never stop the frontend in my living
> room except to reboot it (which I generally do via SSH), I use a
> script I hacked up to somewhat intelligently control a program that
> crashes at startup (mainly due to transient errors):
> 
> krose_run
> ---------
> #! /bin/bash
> 
> # === CONFIG START ========================
> BLIPCYCLE=30
> ROLLDELAY=900
> # === CONFIG END ==========================
> 
> trap finalize 15
> 
> finalize()
> {
>         if [ "${CHILDPID}" != "" ]; then
>                 kill ${CHILDPID}
>         fi
>         exit 0
> }
> 
> LASTSTART=0
> while true; do
>         NOW=`date +%s`
>         TOOSHORT=$((${NOW}-${LASTSTART} < ${BLIPCYCLE}))
>         if [ ${TOOSHORT} = 1 ]; then
>                 sleep ${ROLLDELAY} &
>                 CHILDPID=$!
>                 wait ${CHILDPID}
>                 CHILDPID=""
>         fi
>         LASTSTART=`date +%s`
>         "$@" &
>         CHILDPID=$!
>         wait ${CHILDPID}
>         CHILDPID=""
> done
> ---------
> 
> You then can run any command that should run forever (i.e., until
> the krose_run instance is TERM'ed) just by prepending it with
> krose_run:
> 
> krose_run /usr/local/bin/mythfrontend --verbose playback
> 
> and the program will be continually respawned until TERM'ed, but will
> wait 900 seconds before the next attempt if the program exits less
> than 30 seconds since the last execution.
> 
> I use this to run both my backend and frontend: the backend init
> script calls krose_run on /usr/local/bin/mythbackend directly, while
> the frontend init script calls startx as user mythtv for "start" and
> for "stop" relies on a pid file that .xinitrc writes for the krose_run
> process that manages mythfrontend.  This way, both backend and
> frontend keep respawning until I explicitly stop them with the init
> script.
> 
> Cheers,
> Kyle
> 
> 
> Bryan Murphy <bryan at terralab.com> writes:
> 
> > This is what I use.  It restarts myth if it crashes, but not if you exit
> > it normally.  Modify to fit your environment.
> >
> > #!/bin/sh
> >
> > export DISPLAY=":0.1"
> > xset -display :0.1 -dpms
> > xset -display :0.1 s off
> >
> > until [ "$?" == "1" ]; do
> >    /opt/MythTV/bin/mythfrontend > /tmp/mythfrontend.log 2>&1
> > done
> 
> 
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>