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Editorial Team
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Asked: 2026-05-27T23:59:15+00:00

Is the kill function in Linux synchronous? Say, I programatically call the kill function

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Is the kill function in Linux synchronous? Say, I programatically call the kill function to terminate a process, will it return only when the intended process is terminated, or it just sends the signal and return. If that is the case, how can I make it wait for the intended process to be killed?

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1 Answer

  1. Editorial Team

    No, since it doesn’t kill anything, it only sends a signal to the process.

    By default this signal can even be blocked or ignored.

    You can’t block kill -9 which represents sending SIGKILL

    To wait for the process to die:

    while kill -0 PID_OF_THE_PROCESS 2>/dev/null; do sleep 1; done
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