kill - Send signal to own program

Definition	#include <signal.h> int kill(int pn, int sig); kill continues to be supported for compatibility reasons; it works like the ANSI function raise. The only difference is that the kill function expects the program number pn as the first argument, which must always be 0 since the signal may only be sent to its own program (see also return value -1).
Return val.	0 -1	The signal was sent successfully. The signal could not be sent, because sig is not a valid signal number or the program number pn is not equal to 0. In addition, errno is set to the appropriate program error code: EINVAL (invalid signal number) ESRCH (program number not 0).
Example	A program that aborts itself. #include <signal.h> int main(void) { for(;;) kill(0, SIGKILL); return 0; }
See also	alarm, raise, signal