CODEWITHSUNDEEP
c++linuxprocessposix
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Reputation: 4175

How to monitor a child process state in Linux

I have a control service that its functionality is to manage another process in the system. I have to run this process, re-run it if it's unexpectedly closed, and close it manually upon user request.

Can you please advise me how to do that in Linux? should I save the child process PID and check its state periodically? can I register to some system events that will notify me if the application running state has been changed?

Thanks in advance.

Upvotes: 0

Views: 632

Answers (1)

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Reputation: 16404

should I save the child process PID and check its state periodically?

No, if the child exits, the parent will receive signal SIGCHLD, so you can install signal handler to react on this event.

See sigaction(2) for how to install a signal handler, see signal(7) for general information about signal.

Upvotes: 1

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