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/* Copyright (C) 1992, 1993, 1996, 1997, 1998 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 Library General Public License as

   published by the Free Software Foundation; either version 2 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

   Library General Public License for more details.

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

   License along with the GNU C Library; see the file COPYING.LIB.  If not,

   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,

   Boston, MA 02111-1307, USA.

   About the only thing remaining here fromthe original Linux-8086 C library

   version by Robert de Bath <robert@mayday.compulink.co.uk>, is the general

   layout.  All else has been recently stolen from GNU libc, since that was

   much more current.

 */

#include <errno.h>

#include <stddef.h>

#include <sys/ioctl.h>

#include <sys/types.h>

#include <unistd.h>

#include <termios.h>

#ifdef L_isatty

/* Return 1 if FD is a terminal, 0 if not.  */

int isatty(int fd)

{

    struct termios term;

    return (tcgetattr (fd, &term) == 0);

}

#endif

#ifdef L_tcdrain

/* Wait for pending output to be written on FD.  */

int __libc_tcdrain (int fd)

{

      /* With an argument of 1, TCSBRK waits for the output to drain.  */

      return ioctl(fd, TCSBRK, 1);

}

weak_alias(__libc_tcdrain, tcdrain)

#endif

#ifdef L_tcflow

/* Suspend or restart transmission on FD.  */

int tcflow ( int fd, int action)

{

      return ioctl(fd, TCXONC, action);

}

#endif

#ifdef L_tcflush

/* Flush pending data on FD.  */

int tcflush ( int fd, int queue_selector)

{

      return ioctl(fd, TCFLSH, queue_selector);

}

#endif

#ifdef L_tcsendbreak

/* Send zero bits on FD.  */

int tcsendbreak( int fd, int duration)

{

        /* The break lasts 0.25 to 0.5 seconds if DURATION is zero,

           and an implementation-defined period if DURATION is nonzero.

           We define a positive DURATION to be number of milliseconds to break.  */

        if (duration <= 0)

                return ioctl(fd, TCSBRK, 0);

#ifdef TCSBRKP

        /* Probably Linux-specific: a positive third TCSBRKP ioctl argument is

           defined to be the number of 100ms units to break.  */

        return ioctl(fd, TCSBRKP, (duration + 99) / 100);

#else

        /* ioctl can't send a break of any other duration for us.

           This could be changed to use trickery (e.g. lower speed and

           send a '\0') to send the break, but for now just return an error.  */

        __set_errno (EINVAL);

        return -1;

#endif

}

#endif

#ifdef L_tcsetpgrp

/* Set the foreground process group ID of FD set PGRP_ID.  */

int tcsetpgrp ( int fd, pid_t pgrp_id)

{

      return ioctl (fd, TIOCSPGRP, &pgrp_id);

}

#endif

#ifdef L_tcgetpgrp

/* Return the foreground process group ID of FD.  */

pid_t tcgetpgrp ( int fd)

{

    int pgrp;

    if (ioctl (fd, TIOCGPGRP, &pgrp) < 0)

        return (pid_t) -1;

    return (pid_t) pgrp;

}

#endif

/* This is a gross hack around a kernel bug.  If the cfsetispeed functions is

 * called with the SPEED argument set to zero this means use the same speed as

 * for output.  But we don't have independent input and output speeds and

 * therefore cannot record this.

 *

 * We use an unused bit in the `c_iflag' field to keep track of this use of

 * `cfsetispeed'.  The value here must correspond to the one used in

 * `tcsetattr.c'.  */

#define IBAUD0  020000000000

#ifdef L_cfgetospeed

/* Return the output baud rate stored in *TERMIOS_P.  */

speed_t cfgetospeed ( const struct termios *termios_p)

{

      return termios_p->c_cflag & (CBAUD | CBAUDEX);

}

#endif

#ifdef L_cfgetispeed

/* Return the input baud rate stored in *TERMIOS_P.

 * Although for Linux there is no difference between input and output

 * speed, the numerical 0 is a special case for the input baud rate. It

 * should set the input baud rate to the output baud rate. */

speed_t cfgetispeed (const struct termios *termios_p)

{

    return ((termios_p->c_iflag & IBAUD0)

            ? 0 : termios_p->c_cflag & (CBAUD | CBAUDEX));

}

#endif

#ifdef L_cfsetospeed

/* Set the output baud rate stored in *TERMIOS_P to SPEED.  */

int cfsetospeed  (struct termios *termios_p, speed_t speed)

{

    if ((speed & ~CBAUD) != 0

            && (speed < B57600 || speed > B460800))

    {

        __set_errno(EINVAL);

        return -1;

    }

    termios_p->c_cflag &= ~(CBAUD | CBAUDEX);

    termios_p->c_cflag |= speed;

    return 0;

}

#endif

#ifdef L_cfsetispeed

/* Set the input baud rate stored in *TERMIOS_P to SPEED.

 *    Although for Linux there is no difference between input and output

 *       speed, the numerical 0 is a special case for the input baud rate.  It

 *          should set the input baud rate to the output baud rate.  */

int cfsetispeed ( struct termios *termios_p, speed_t speed)

{

    if ((speed & ~CBAUD) != 0

            && (speed < B57600 || speed > B460800))

    {

        __set_errno(EINVAL);

        return -1;

    }

    if (speed == 0)

        termios_p->c_iflag |= IBAUD0;

    else

    {

        termios_p->c_iflag &= ~IBAUD0;

        termios_p->c_cflag &= ~(CBAUD | CBAUDEX);

        termios_p->c_cflag |= speed;

    }

    return 0;

}

#endif

#ifdef L_cfsetspeed

struct speed_struct

{

  speed_t value;

  speed_t internal;

};

static const struct speed_struct speeds[] =

  {

#ifdef B0

    { 0, B0 },

#endif

#ifdef B50

    { 50, B50 },

#endif

#ifdef B75

    { 75, B75 },

#endif

#ifdef B110

    { 110, B110 },

#endif

#ifdef B134

    { 134, B134 },

#endif

#ifdef B150

    { 150, B150 },

#endif

#ifdef B200

    { 200, B200 },

#endif

#ifdef B300

    { 300, B300 },

#endif

#ifdef B600

    { 600, B600 },

#endif

#ifdef B1200

    { 1200, B1200 },

#endif

#ifdef B1200

    { 1200, B1200 },

#endif

#ifdef B1800

    { 1800, B1800 },

#endif

#ifdef B2400

    { 2400, B2400 },

#endif

#ifdef B4800

    { 4800, B4800 },

#endif

#ifdef B9600

    { 9600, B9600 },

#endif

#ifdef B19200

    { 19200, B19200 },

#endif

#ifdef B38400

    { 38400, B38400 },

#endif

#ifdef B57600

    { 57600, B57600 },

#endif

#ifdef B76800

    { 76800, B76800 },

#endif

#ifdef B115200

    { 115200, B115200 },

#endif

#ifdef B153600

    { 153600, B153600 },

#endif

#ifdef B230400

    { 230400, B230400 },

#endif

#ifdef B307200

    { 307200, B307200 },

#endif

#ifdef B460800

    { 460800, B460800 },

#endif

  };

/* Set both the input and output baud rates stored in *TERMIOS_P to SPEED.  */

int cfsetspeed (struct termios *termios_p, speed_t speed)

{

  size_t cnt;

  for (cnt = 0; cnt < sizeof (speeds) / sizeof (speeds[0]); ++cnt)

    if (speed == speeds[cnt].internal)

      {

        cfsetispeed (termios_p, speed);

        cfsetospeed (termios_p, speed);

        return 0;

      }

    else if (speed == speeds[cnt].value)

      {

        cfsetispeed (termios_p, speeds[cnt].internal);

        cfsetospeed (termios_p, speeds[cnt].internal);

        return 0;

      }

  __set_errno (EINVAL);

  return -1;

}

#endif

#ifdef L_cfmakeraw

/* Copyright (C) 1992, 1996, 1997 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

*/

#include <termios.h>

/* Set *T to indicate raw mode.  */

void

cfmakeraw (struct termios *t)

{

  t->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);

  t->c_oflag &= ~OPOST;

  t->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);

  t->c_cflag &= ~(CSIZE|PARENB);

  t->c_cflag |= CS8;

  t->c_cc[VMIN] = 1;            /* read returns when one char is available.  */

  t->c_cc[VTIME] = 0;

}

#endif