sysdeps/unix/sysv/tcflush.c

   1 /* Copyright (C) 1992 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 Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 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 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <ansidecl.h>
  20 #include <errno.h>
  21 #include <stddef.h>
  22 #include <termios.h>
  23 #include <unistd.h>
  24 #include <sys/ioctl.h>
  25
  26 #include <sysv_termio.h>
  27
  28 /* Flush pending data on FD.  */
  29 int
  30 DEFUN(tcflush, (fd, queue_selector), int fd AND int queue_selector)
  31 {
  32   switch (queue_selector)
  33     {
  34     case TCIFLUSH:
  35       return __ioctl (fd, _TCFLSH, 0);
  36     case TCOFLUSH:
  37       return __ioctl (fd, _TCFLSH, 1);
  38     case TCIOFLUSH:
  39       return __ioctl (fd, _TCFLSH, 2);
  40     default:
  41       errno = EINVAL;
  42       return -1;
  43     }
  44 }