termios/tcflow.c

   1 /* Copyright (C) 1991, 1995, 1996, 1997 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <termios.h>
  21
  22 /* Suspend or restart transmission on FD.  */
  23 int
  24 tcflow (fd, action)
  25      int fd;
  26      int action;
  27 {
  28   if (fd < 0)
  29     {
  30       __set_errno (EBADF);
  31       return -1;
  32     }
  33
  34   switch (action)
  35     {
  36     case TCOOFF:
  37     case TCOON:
  38     case TCIOFF:
  39     case TCION:
  40       break;
  41
  42     default:
  43       __set_errno (EINVAL);
  44       return -1;
  45     }
  46
  47   __set_errno (ENOSYS);
  48   return -1;
  49 }
  50
  51
  52 stub_warning (tcflow)
  53 #include <stub-tag.h>