TIOCGPGRP copies an int out of the kernel

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

/*-
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*/

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)termios.c   5.5 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#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
{
       return(ioctl(fd, TIOCSPGRP, &pgrp));
}

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 */
}