PD_NOWAITPID
if ((fr->fr_pd_flags & PD_NOWAITPID) == 0 &&
#define PD_ALLOWED_AT_FORK (PD_DAEMON | PD_CLOEXEC | PD_NOWAITPID)
pid = pdfork(&fdp, PD_NOWAITPID);
traced = pdfork(&pd, PD_NOWAITPID);