os/proc-kill

    cfunction
    src/core/os.c on line 592, column 1

    (os/proc-kill proc &opt wait)

    Kill a subprocess by sending SIGKILL to it on posix systems, or by 
    closing the process handle on windows. If `wait` is truthy, will 
    wait for the process to finish and returns the exit code. 
    Otherwise, returns `proc`.