BSD 4_3_Net_2 release

[unix-history] / usr / src / lib / libc / gen / termios.c

/*-
* Copyright (c) 1989 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   5.9 (Berkeley) 5/20/91";
#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#define KERNEL  /* XXX - FREAD and FWRITE was ifdef'd KERNEL*/
#include <sys/fcntl.h>
#undef KERNEL
#include <termios.h>
#include <stdio.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;
               opt &= ~TCSASOFT;
       }
       if (opt == TCSANOW)
               return (ioctl(fd, TIOCSETA, t));
       else if (opt == TCSADRAIN)
               return (ioctl(fd, TIOCSETAW, t));
       return (ioctl(fd, TIOCSETAF, t));
}

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 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);
}

void
cfsetspeed(t, speed)
       struct termios *t;
       speed_t speed;
{
       t->c_ispeed = t->c_ospeed = speed;
}

/*
* 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 &= ~(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;
       /* set MIN/TIME */
}

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);
       select(0, 0, 0, 0, &sleepytime);
       if (ioctl(fd, TIOCCBRK, 0) == -1)
               return (-1);

       return (0);
}

tcdrain(fd)
       int fd;
{
       if (ioctl(fd, TIOCDRAIN, 0) == -1)
               return (-1);

       return (0);
}

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);
       }
       if (ioctl(fd, TIOCFLUSH, &com) == -1)
               return (-1);

       return (0);
}

tcflow(fd, action)
       int fd, action;
{
       switch (action) {
       case TCOOFF:
               return (ioctl(fd, TIOCSTOP, 0));
               break;
       case TCOON:
               return (ioctl(fd, TIOCSTART, 0));
               break;
       case TCIOFF:
       case TCION: {           /* these posix functions are STUPID */
               struct termios term;
               unsigned char c;

               if (tcgetattr(fd, &term) == -1)
                       return (-1);
               c = term.c_cc[action == TCIOFF ? VSTOP : VSTART];
               if (c != _POSIX_VDISABLE && write(fd, &c, 1) == -1)
                       return (-1);
               break;
       }
       default:
               errno = EINVAL;
               return (-1);
       }

       return (0);
}