[nos-bbs] how to launch JNOS from cron or python

[Andrew Pepper]

I followed the raspberry pi3 how-to on this site. To automatically start
jnos on say tty7 and if the machine is restarted everything fires back up.
Those instructions should work for any debian based systems.
http://server1.nuge.com/~drg/jnos.html

Andrew, K1YMI

On Mon, Oct 18, 2021, 17:30 Sky via nos-bbs <nos-bbs at lists.tapr.org> wrote:

> Gosh, I should know this stuff, but I got deep into it and so far no
> solution, so let me ask if others have soled this problem already.
>
> I want to automatically launch JNOS after a power failure.
>
> At the moment I do this by going to the computer and bringing up
> *Terminal* and then launching JNOS in that session and I just leave it
> open. Works great until the power fails. If I am away or out of town, JNOS
> won't run again until I notice the failure and fire up the display and
> keyboard. (I do have an automated cron that notices the failure and emails
> me, but it can be several hours before I notice, and as I said, I may be
> out of town.)
>
> So from crontab preferably I would like to launch JNOS and let it run
> indefinitely. But also I'd like to do it from Python because that's what
> I'm using as my base for writing additional JNOS support.
>
> I know how to detect whether it is running already and all of that and
> then try to launch it if not already running, what I can't get is how to
> launch JNOS without Terminal. Meaning there is no 'environment' for it to
> run in. If I do that, it launches but immediately just exits. Nothing in
> syslog that I can find to help me know. I presume I have to have cron
> launch JNOS with some kind of environment specified, but so far I can't
> figure that out.
>
>
> *If someone has already solved this, I would prefer to know your solution,
> not necessarily to debug mine.*
>
> I'm not going to put the code here because you will be tempted to try to
> debug it. Just suffice it to say it does launch the process, gets a PID in
> return, but that process will exit without actually completing the JNOS
> launch. And I presume this is because JNOS needs an 'environment' to run in
> and cannot run by itself.
>
> —Sky
>
>
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> "Sky" (Jim Schuyler)
> —Amateur Radio AA6AX
> Online at aa6ax.us
>
>
>
>
>
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