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user877329
Asked: 2014-11-14 05:51:00 +0800 CST

User processes continue to run after logout

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I have put the following code in my .profile

ps cax | grep jackd > /dev/null
if [ $? -eq 0 ]; then
    echo "Jack is aready running."
fi

if [ "$SESSION_TYPE" != "remote/ssh" ] && [ "$DISPLAY" ]; then
    ps cax | grep jackd > /dev/null
    if [ $? -eq 0 ]; then
        echo "Jack is aready running."
    else
        jackd --sync -P80 -p128 -dalsa -dhw:UA25 -r48000 -p64 -n3 -Xraw &
        jack_wait -w
        alsaj &
        ~/deployed/syzmo/x86_64-GNU%2fLinux/syzmo_client_studio &
    fi
fi

When I logout from KDE and log in on tty1, I see the message "Jack is already running". When listing processes, I see that I have started it, so I conclude that jack never stopped. How could that be?

Here is what I see from ps -u when logging in from tty1:

  PID TTY          TIME CMD
 2053 ?        00:32:39 jackd
 2079 ?        00:00:00 alsaj
 2082 ?        00:11:00 alsa_in
10265 tty1     00:00:00 bash
10295 tty1     00:00:00 ps

Why do I still see jackd and alsa_in among running processes?

Follow-up:

Since the processes does not die when logging out, there has to be a corresponding log-out script that does not run as root. Is there a way of cleaning up any side-effects caused by .profile?

kde

1 Answers

  1. It is still running because you didn't stop it. You shouldn't be starting daemons like this in your .profile. A normally installed jackd package will set itself up to be automatically started and stopped at the appropriate times via upstart.

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