fx_priocntl
if (fx_priocntl(P_ALL, 0, PC_SETXPARMS, "FX", args) == -1) {
if (fx_priocntl(idtype, P_MYID, PC_SETXPARMS, "FX",
if (fx_priocntl(idtype, id, PC_SETXPARMS, "FX", args)
if (fx_priocntl(P_PID, P_MYID, PC_SETXPARMS, "FX", args) == -1)
static int fx_priocntl(idtype_t, id_t, int, char *, uintptr_t *);