1  /* Copyright (C) 1992-2023 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)