freebsd-dev/lib/libc/gen/termios.c
Andrey A. Chernov 81c280f58f Back out one of my previous changes: don't clear PARODD,
so return to absolute minimum of changed flags now
1996-03-28 13:33:18 +00:00

246 lines
4.9 KiB
C

/*-
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)termios.c 8.2 (Berkeley) 2/21/94";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <errno.h>
#include <termios.h>
#include <unistd.h>
int
tcgetattr(fd, t)
int fd;
struct termios *t;
{
return (ioctl(fd, TIOCGETA, t));
}
int
tcsetattr(fd, opt, t)
int fd, opt;
const struct termios *t;
{
struct termios localterm;
if (opt & TCSASOFT) {
localterm = *t;
localterm.c_cflag |= CIGNORE;
t = &localterm;
}
switch (opt & ~TCSASOFT) {
case TCSANOW:
return (ioctl(fd, TIOCSETA, t));
case TCSADRAIN:
return (ioctl(fd, TIOCSETAW, t));
case TCSAFLUSH:
return (ioctl(fd, TIOCSETAF, t));
default:
errno = EINVAL;
return (-1);
}
}
int
#if __STDC__
tcsetpgrp(int fd, pid_t pgrp)
#else
tcsetpgrp(fd, pgrp)
int fd;
pid_t pgrp;
#endif
{
int s;
s = pgrp;
return (ioctl(fd, TIOCSPGRP, &s));
}
pid_t
tcgetpgrp(fd)
int fd;
{
int s;
if (ioctl(fd, TIOCGPGRP, &s) < 0)
return ((pid_t)-1);
return ((pid_t)s);
}
speed_t
cfgetospeed(t)
const struct termios *t;
{
return (t->c_ospeed);
}
speed_t
cfgetispeed(t)
const struct termios *t;
{
return (t->c_ispeed);
}
int
cfsetospeed(t, speed)
struct termios *t;
speed_t speed;
{
t->c_ospeed = speed;
return (0);
}
int
cfsetispeed(t, speed)
struct termios *t;
speed_t speed;
{
t->c_ispeed = speed;
return (0);
}
int
cfsetspeed(t, speed)
struct termios *t;
speed_t speed;
{
t->c_ispeed = t->c_ospeed = speed;
return (0);
}
/*
* Make a pre-existing termios structure into "raw" mode: character-at-a-time
* mode with no characters interpreted, 8-bit data path.
*/
void
cfmakeraw(t)
struct termios *t;
{
t->c_iflag &= ~(IMAXBEL|IXOFF|INPCK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IGNPAR);
t->c_iflag |= IGNBRK;
t->c_oflag &= ~OPOST;
t->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON|ISIG|IEXTEN|NOFLSH|TOSTOP|PENDIN);
t->c_cflag &= ~(CSIZE|PARENB);
t->c_cflag |= CS8|CREAD;
t->c_cc[VMIN] = 1;
t->c_cc[VTIME] = 0;
}
int
tcsendbreak(fd, len)
int fd, len;
{
struct timeval sleepytime;
sleepytime.tv_sec = 0;
sleepytime.tv_usec = 400000;
if (ioctl(fd, TIOCSBRK, 0) == -1)
return (-1);
(void)select(0, 0, 0, 0, &sleepytime);
if (ioctl(fd, TIOCCBRK, 0) == -1)
return (-1);
return (0);
}
int
tcdrain(fd)
int fd;
{
return (ioctl(fd, TIOCDRAIN, 0));
}
int
tcflush(fd, which)
int fd, which;
{
int com;
switch (which) {
case TCIFLUSH:
com = FREAD;
break;
case TCOFLUSH:
com = FWRITE;
break;
case TCIOFLUSH:
com = FREAD | FWRITE;
break;
default:
errno = EINVAL;
return (-1);
}
return (ioctl(fd, TIOCFLUSH, &com));
}
int
tcflow(fd, action)
int fd, action;
{
struct termios term;
u_char c;
switch (action) {
case TCOOFF:
return (ioctl(fd, TIOCSTOP, 0));
case TCOON:
return (ioctl(fd, TIOCSTART, 0));
case TCION:
case TCIOFF:
if (tcgetattr(fd, &term) == -1)
return (-1);
c = term.c_cc[action == TCIOFF ? VSTOP : VSTART];
if (c != _POSIX_VDISABLE && write(fd, &c, sizeof(c)) == -1)
return (-1);
return (0);
default:
errno = EINVAL;
return (-1);
}
/* NOTREACHED */
}