SAS_NOCLDSTOP
if ((pr->ps_pptr->ps_sigacts->ps_sigflags & SAS_NOCLDSTOP) == 0)
if ((ps->ps_sigflags & SAS_NOCLDSTOP) != 0)
atomic_setbits_int(&ps->ps_sigflags, SAS_NOCLDSTOP);
atomic_clearbits_int(&ps->ps_sigflags, SAS_NOCLDSTOP);
ps->ps_sigflags = SAS_NOCLDWAIT | SAS_NOCLDSTOP;