/* Copyright (C) 1992-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <errno.h>

#include <string.h>

#include <termios.h>

#include <unistd.h>

#include <sys/ioctl.h>

#include <sys/types.h>

#include <sysdep.h>

/* The difference here is that the termios structure used in the

   kernel is not the same as we use in the libc.  Therefore we must

   translate it here.  */

#include <kernel_termios.h>

/* Put the state of FD into *TERMIOS_P.  */

int

__tcgetattr (int fd, struct termios *termios_p)

{

  struct __kernel_termios k_termios;

  int retval;

  retval = INLINE_SYSCALL (ioctl, 3, fd, TCGETS, &k_termios);

  if (__glibc_likely (retval == 0))

    {

      termios_p->c_iflag = k_termios.c_iflag;

      termios_p->c_oflag = k_termios.c_oflag;

      termios_p->c_cflag = k_termios.c_cflag;

      termios_p->c_lflag = k_termios.c_lflag;

      termios_p->c_line = k_termios.c_line;

#ifdef _HAVE_STRUCT_TERMIOS_C_ISPEED

# ifdef _HAVE_C_ISPEED

      termios_p->c_ispeed = k_termios.c_ispeed;

# else

      termios_p->c_ispeed = k_termios.c_cflag & (CBAUD | CBAUDEX);

# endif

#endif

#ifdef _HAVE_STRUCT_TERMIOS_C_OSPEED

# ifdef _HAVE_C_OSPEED

      termios_p->c_ospeed = k_termios.c_ospeed;

# else

      termios_p->c_ospeed = k_termios.c_cflag & (CBAUD | CBAUDEX);

# endif

#endif

      if (sizeof (cc_t) == 1 || _POSIX_VDISABLE == 0

	  || (unsigned char) _POSIX_VDISABLE == (unsigned char) -1)

	memset (__mempcpy (&termios_p->c_cc[0], &k_termios.c_cc[0],

			   __KERNEL_NCCS * sizeof (cc_t)),

		_POSIX_VDISABLE, (NCCS - __KERNEL_NCCS) * sizeof (cc_t));

      else

	{

	  memcpy (&termios_p->c_cc[0], &k_termios.c_cc[0],

		  __KERNEL_NCCS * sizeof (cc_t));

	  for (size_t cnt = __KERNEL_NCCS; cnt < NCCS; ++cnt)

	    termios_p->c_cc[cnt] = _POSIX_VDISABLE;

	}

    }

  return retval;

}

libc_hidden_def (__tcgetattr)

weak_alias (__tcgetattr, tcgetattr)