The raise() function sends the signal sig to the executing program. It uses the kill() function to send the signal to the executing program, as follows:

kill(getpid(), sig);

See the kill(2) manual page for a detailed list of failure conditions and the signal(3C) manual page for a list of signals.

Upon successful completion, 0 is returned. Otherwise, -1 is returned and errno is set to indicate the error.

See attributes(5) for descriptions of the following attributes:

getpid(2), kill(2), signal(3C), attributes(5)