function kill (pid, signum) integer pid, signum
The argument pid must be the process id of one of the user's processes.
The argument signum must be a valid signal number. See signal(3F).
The returned value is 0 if successful, an error code otherwise.
This function merely sends a signal to a process; it does not necessarily kill the process.
libfui.a
kill(2), signal(3C), signal(3F), fork(3F), perror(3F)