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Shell script to restart a process if it outputs a certain piece of text

rated 0 times [ 3] [ 0] / answers: 1 / hits: 4672 / 1 Year ago, sun, december 11, 2022, 8:23:02

I have a python program which, from time to time, crashes with a number of different exceptions usually due to network issues. The only way to get it to work is to restart it. How would I write a shell script to run the process, continually check if any of the output says Error and if so end the process and restart the command (let's call it ./command.sh)?

It would be fine for this to be in any other language (python/perl etc).

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confiorc

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4 Years ago

answered 1 Year ago atelti · Accepted Answer

Since python exits with an return code != 0 when it throws an exception, you can just run this shell script:

while ! ./command.sh ; do : ; done

Of course if you just want to run the command all the time, just write:

while true ; do ./command.sh ; done

(this assumes ./command.sh doesn't fork and exit)