signal-process
signal-process is an interactive built-in function in `C source code
'.
(signal-process PROCESS SIGCODE)
Send PROCESS the signal with code SIGCODE.
PROCESS may also be a number specifying the process id of the
process to signal; in this case, the process need not be a child of
this Emacs.
SIGCODE may be an integer, or a symbol whose name is a signal name.