#include <signal.h>
  int raise( int signal );

The raise() function sends the specified signal to the program. Some signals:

Signal	Meaning
SIGABRT	Termination error
SIGFPE	Floating pointer error
SIGILL	Bad instruction
SIGINT	User presed CTRL-C
SIGSEGV	Illegal memory access
SIGTERM	Terminate program

The return value is zero upon success, nonzero on failure.