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/* `struct termios' speed frobnication functions. Linux version.
Copyright (C) 1991, 92, 93, 95, 96, 97, 98, 2000 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
/* Modified by Jeff Johnston, May 27, 2002 to remove kernel hack
as we simply ignore a cfisetspeed of 0 instead of treating it specially */
#include <stddef.h>
#include <errno.h>
#include <termios.h>
/* Return the output baud rate stored in *TERMIOS_P. */
speed_t
cfgetospeed (termios_p)
const struct termios *termios_p;
{
return termios_p->c_cflag & (CBAUD | CBAUDEX);
}
/* Return the input baud rate stored in *TERMIOS_P.
For Linux there is no difference between input and output
speed. */
speed_t
cfgetispeed (termios_p)
const struct termios *termios_p;
{
return termios_p->c_cflag & (CBAUD | CBAUDEX);
}
/* Set the output baud rate stored in *TERMIOS_P to SPEED. */
int
cfsetospeed (termios_p, speed)
struct termios *termios_p;
speed_t speed;
{
if ((speed & ~CBAUD) != 0
&& (speed < B57600 || speed > __MAX_BAUD))
{
errno = (EINVAL);
return -1;
}
termios_p->c_cflag &= ~(CBAUD | CBAUDEX);
termios_p->c_cflag |= speed;
return 0;
}
/* 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 so we do
nothing. */
int
cfsetispeed (termios_p, speed)
struct termios *termios_p;
speed_t speed;
{
if ((speed & ~CBAUD) != 0
&& (speed < B57600 || speed > __MAX_BAUD))
{
errno = (EINVAL);
return -1;
}
if (speed != 0)
{
termios_p->c_cflag &= ~(CBAUD | CBAUDEX);
termios_p->c_cflag |= speed;
}
return 0;
}
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