sysdeps/unix/bsd/tcsetattr.c

   1 /* Copyright (C) 1992-2020 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 <stddef.h>
  20 #include <termios.h>
  21
  22 /* These are defined both in <bits/termios.h> and in <bits/ioctls.h>.
  23    They should have the same values, but perhaps not written the same way.  */
  24 #undef ECHO
  25 #undef MDMBUF
  26 #undef TOSTOP
  27 #undef FLUSHO
  28 #undef PENDIN
  29 #undef NOFLSH
  30 #include <sys/ioctl.h>
  31
  32
  33 /* Set the state of FD to *TERMIOS_P.  */
  34 int
  35 tcsetattr (int fd, int optional_actions, const struct termios *termios_p)
  36 {
  37   struct termios myt;
  38
  39   if (optional_actions & TCSASOFT)
  40     {
  41       myt = *termios_p;
  42       myt.c_cflag |= CIGNORE;
  43       termios_p = &myt;
  44       optional_actions &= ~TCSASOFT;
  45     }
  46
  47   switch (optional_actions)
  48     {
  49     case TCSANOW:
  50       return __ioctl (fd, TIOCSETA, termios_p);
  51
  52     case TCSADRAIN:
  53       return __ioctl (fd, TIOCSETAW, termios_p);
  54
  55     default:
  56       return __ioctl (fd, TIOCSETAF, termios_p);
  57     }
  58 }
  59 libc_hidden_def (tcsetattr)