O_NONBLOCK        326 maint/gnulib/lib/fcntl.in.h # define O_NONBLOCK O_NDELAY
O_NONBLOCK        337 maint/gnulib/lib/fcntl.in.h #  undef O_NONBLOCK
O_NONBLOCK        338 maint/gnulib/lib/fcntl.in.h #  define O_NONBLOCK 0x40000000