如果一个Cron作业失败，请继续执行下一个作业

Question

I've set up my Crontab to execute a selection of Python scripts in order to interrogate a solar inverter and upload the results to PVOutput:

*/5 * * * * cd /home/Pi/; python pvout_upload.py;
*/5 * * * * cd /home/Pi/; python weather.py;

The problem is if the internet goes down, then those scripts fail. So I've created another script that reads the inverter and stores the result to a local database that can be uploaded later. But if there's no internet, then those previous Cron-task fail and the Python script won't run either.

Is there a way to have Cron-task carry on to the next line if one fails?

Answer 1

You can use classical shell resources for this. If you put

command1 || command2 

in your crontab line. Then:

command2 will be executed if command1 fails (returns an error) It would be something like:

*/5 * * * * cd /home/Pi/; python pvout_upload.py || python errorManagement.py

Of course, you could also embed this logic in your python script.