SA_RESETHAND
sa_resethand_child(SA_RESETHAND);
act.sa_flags = SA_SIGINFO | SA_RESETHAND | SA_NODEFER;
act.sa_flags = SA_SIGINFO | SA_RESETHAND | SA_NODEFER;
sa->sa_flags |= SA_RESETHAND;
if ((sa->sa_flags & SA_RESETHAND) != 0)
#define SV_RESETHAND SA_RESETHAND
sigalarm.sa_flags = SA_RESETHAND; /* should only happen once */