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15

Need help with bash checking if computer uptime is greater than 5 minutes

rated 0 times [ 15] [ 0] / answers: 1 / hits: 10091 / 1 Year ago, mon, january 23, 2023, 1:56:48

I have an bash script that runs on a every minute cron. It checks to see if a necessary program is running and starts it if it is not. Occasionally it will run before the user has actually autologged in. I want to prevent that from happening.

What I think I'd like to do is to put a check in the check the computer's uptime and see if it'd been on for 5 minutes so that auto login had a chance to finish before the program gets started. I'm fairly new to bash and parsing what I get from "uptime" to where I could use it for comparison seems out of my reach.

Can anyone help? Perhaps there is a better solution. I'm stuck.

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pheter

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answered 1 Year ago velelf · Accepted Answer

A bash script/cron job is the wrong solution for the problem you are trying to solve. Actually, scratch that -- two bash scripts/cron jobs are the wrong solution for your problem. ;)

The problem you are trying to solve is, "ensure a task starts running after a user has logged in, and ensure it stays running". This is a job for upstart.

The following should do what you want, and it goes into /etc/init/. Name the file something like user-session-job.conf.

description "Keep my very important program running"



start on desktop-session-start

stop on desktop-shutdown



respawn



script

    /path/to/my/very/important/program

end script

Please see the upstart cookbook for lots more help:
http://upstart.ubuntu.com/cookbook/