pr_setsig
error = pr_setsig(pnp, &argp->siginfo);
error = pr_setsig(pnp, &siginfo);
extern int pr_setsig(prnode_t *, siginfo_t *);
error = pr_setsig(pnp, &un.info);
error = pr_setsig(pnp, &un.info);