raise() - send a signal to the current process
#include <signal.h>
int raise (int signum)
The raise(3) function sends the signal signum to the current process.
This is equivalent to
kill(getpid(),signum)
Upon successful completion, a value of 0 is returned. Otherwise, a value of -1 is returned and the global variable errno is set to indicate the error.
The raise(3) function may fail and set errno for any of the errors specified for the library functions getpid(2) and kill(2).
kill(2)