sys/kern/kern_sig.c

810 	register struct sigaction *actp, *oactp;
814 	oactp = (uap->oact != NULL) ? &oact : NULL;
820 	error = kern_sigaction(td, uap->sig, actp, oactp, 0);
821 	if (oactp && !error)
822 		error = copyout(oactp, uap->oact, sizeof(oact));
840 	register struct sigaction *actp, *oactp;
845 	oactp = (uap->oact != NULL) ? &oact : NULL;
851 	error = kern_sigaction(td, uap->sig, actp, oactp, KSA_FREEBSD4);
852 	if (oactp && !error)
853 		error = copyout(oactp, uap->oact, sizeof(oact));