A simple: 
fork && exit;

[download]
would do the trick. fork() generates a child process and returns 0 to it, but its PID to the parent process, so that the above line executes exit() in the parent - which is connected to the terminal - and doesn't executes it in the child process - which will then run in the background.

In reply to Re: How to run a process in background? by mscharrer
in thread How to run a process in background? by advait

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