IFIFO
case IFIFO:
if (mode == IFBLK || mode == IFCHR || mode == IFIFO ||
if (mode != IFIFO) {
case IFIFO:
case IFIFO:
{ "fifo", IFIFO },
case IFIFO:
case IFIFO:
case IFIFO:
mode |= IFIFO;
case IFIFO: