/* ttycntl.c - ttycntl */

#include <conf.h>
#include <kernel.h>
#include <tty.h>

/*------------------------------------------------------------------------
 * ttycntl - control function for TTY pseudo devices
 *------------------------------------------------------------------------
 */
int
ttycntl(pdev, func, arg1, arg2)
struct devsw	*pdev;
int		func;
char		*arg1, *arg2;
{
	struct tty	*ptty = (struct tty *)pdev->dvioblk;
	unsigned char	ch;
	STATWORD	PS;

	switch (func) {
	case TTC_CPID:	ptty->tty_cpid = (int) arg1;
			return OK;
	case TTC_SYNC:	if (arg1)
				ptty->tty_oflags |= TOF_SYNC;
			else
				ptty->tty_oflags &= ~TOF_SYNC;
			return OK;
	case TTC_GIF:	return ptty->tty_iflags;
	case TTC_GOF:	return ptty->tty_oflags;
	case TTC_NEXTC:
			disable(PS);
			wait(ptty->tty_isema);
			ch = ptty->tty_in[ptty->tty_istart];
			signal(ptty->tty_isema);
			restore(PS);
			return ch;
	case TTC_SUSER:
			ptty->tty_uid = (int) arg1;
			gettime(&ptty->tty_ltime);
			ptty->tty_ctime = ptty->tty_ltime;
			return OK;
	case TTC_CUSER:
			ptty->tty_uid = -1;
			return OK;
/* by yas 05/12/98 */
	case TTC_SIF:	ptty->tty_iflags = (int) arg1;
			return OK;
	case TTC_SOF:	ptty->tty_oflags = (int) arg1;
			return OK;
/* by yas 05/12/98 */
	}
	return SYSERR;
}