_PC_VDISABLE
# if defined(HAVE_PATHCONF) && defined(_PC_VDISABLE)
vdisable_c = fpathconf(tty_fd, _PC_VDISABLE);
case _PC_VDISABLE:
case _PC_VDISABLE:
case _PC_VDISABLE:
case _PC_VDISABLE:
case _PC_VDISABLE:
case _PC_VDISABLE:
{ "_POSIX_VDISABLE", PATHCONF, _PC_VDISABLE },