termios/tcflush.c

   1 /* Copyright (C) 1991-2022 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <termios.h>
  20
  21 /* Flush pending data on FD.  */
  22 int
  23 tcflush (int fd, int queue_selector)
  24 {
  25   switch (queue_selector)
  26     {
  27     case TCIFLUSH:
  28     case TCOFLUSH:
  29     case TCIOFLUSH:
  30       break;
  31
  32     default:
  33       __set_errno (EINVAL);
  34       return -1;
  35     }
  36
  37   __set_errno (ENOSYS);
  38   return -1;
  39 }
  40
  41
  42 stub_warning(tcflush);