Пример #1
0
static void n_tty_set_termios(struct tty_struct *tty, struct termios * old)
{
	if (!tty)
		return;
	
	tty->icanon = (L_ICANON(tty) != 0);
	if (test_bit(TTY_HW_COOK_IN, &tty->flags)) {
		tty->raw = 1;
		tty->real_raw = 1;
		return;
	}
	if (I_ISTRIP(tty) || I_IUCLC(tty) || I_IGNCR(tty) ||
	    I_ICRNL(tty) || I_INLCR(tty) || L_ICANON(tty) ||
	    I_IXON(tty) || L_ISIG(tty) || L_ECHO(tty) ||
	    I_PARMRK(tty)) {
		cli();
		memset(tty->process_char_map, 0, 256/8);

		if (I_IGNCR(tty) || I_ICRNL(tty))
			set_bit('\r', &tty->process_char_map);
		if (I_INLCR(tty))
			set_bit('\n', &tty->process_char_map);

		if (L_ICANON(tty)) {
			set_bit(ERASE_CHAR(tty), &tty->process_char_map);
			set_bit(KILL_CHAR(tty), &tty->process_char_map);
			set_bit(EOF_CHAR(tty), &tty->process_char_map);
			set_bit('\n', &tty->process_char_map);
			set_bit(EOL_CHAR(tty), &tty->process_char_map);
			if (L_IEXTEN(tty)) {
				set_bit(WERASE_CHAR(tty),
					&tty->process_char_map);
				set_bit(LNEXT_CHAR(tty),
					&tty->process_char_map);
				set_bit(EOL2_CHAR(tty),
					&tty->process_char_map);
				if (L_ECHO(tty))
					set_bit(REPRINT_CHAR(tty),
						&tty->process_char_map);
			}
		}
		if (I_IXON(tty)) {
			set_bit(START_CHAR(tty), &tty->process_char_map);
			set_bit(STOP_CHAR(tty), &tty->process_char_map);
		}
		if (L_ISIG(tty)) {
			set_bit(INTR_CHAR(tty), &tty->process_char_map);
			set_bit(QUIT_CHAR(tty), &tty->process_char_map);
			set_bit(SUSP_CHAR(tty), &tty->process_char_map);
		}
		clear_bit(__DISABLED_CHAR, &tty->process_char_map);
		sti();
		tty->raw = 0;
		tty->real_raw = 0;
	} else {
		tty->raw = 1;
		if ((I_IGNBRK(tty) || (!I_BRKINT(tty) && !I_PARMRK(tty))) &&
		    (I_IGNPAR(tty) || !I_INPCK(tty)) &&
		    (tty->driver.flags & TTY_DRIVER_REAL_RAW))
			tty->real_raw = 1;
		else
			tty->real_raw = 0;
	}
}
Пример #2
0
static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
{
	unsigned long flags;
	int parmrk;

	if (tty->raw) {
		put_tty_queue(c, tty);
		return;
	}

	if (I_ISTRIP(tty))
		c &= 0x7f;
	if (I_IUCLC(tty) && L_IEXTEN(tty))
		c = tolower(c);

	if (L_EXTPROC(tty)) {
		put_tty_queue(c, tty);
		return;
	}

	if (tty->stopped && !tty->flow_stopped && I_IXON(tty) &&
	    I_IXANY(tty) && c != START_CHAR(tty) && c != STOP_CHAR(tty) &&
	    c != INTR_CHAR(tty) && c != QUIT_CHAR(tty) && c != SUSP_CHAR(tty)) {
		start_tty(tty);
		process_echoes(tty);
	}

	if (tty->closing) {
		if (I_IXON(tty)) {
			if (c == START_CHAR(tty)) {
				start_tty(tty);
				process_echoes(tty);
			} else if (c == STOP_CHAR(tty))
				stop_tty(tty);
		}
		return;
	}

	if (!test_bit(c, tty->process_char_map) || tty->lnext) {
		tty->lnext = 0;
		parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty)) ? 1 : 0;
		if (tty->read_cnt >= (N_TTY_BUF_SIZE - parmrk - 1)) {
			
			if (L_ECHO(tty))
				process_output('\a', tty);
			return;
		}
		if (L_ECHO(tty)) {
			finish_erasing(tty);
			
			if (tty->canon_head == tty->read_head)
				echo_set_canon_col(tty);
			echo_char(c, tty);
			process_echoes(tty);
		}
		if (parmrk)
			put_tty_queue(c, tty);
		put_tty_queue(c, tty);
		return;
	}

	if (I_IXON(tty)) {
		if (c == START_CHAR(tty)) {
			start_tty(tty);
			process_echoes(tty);
			return;
		}
		if (c == STOP_CHAR(tty)) {
			stop_tty(tty);
			return;
		}
	}

	if (L_ISIG(tty)) {
		int signal;
		signal = SIGINT;
		if (c == INTR_CHAR(tty))
			goto send_signal;
		signal = SIGQUIT;
		if (c == QUIT_CHAR(tty))
			goto send_signal;
		signal = SIGTSTP;
		if (c == SUSP_CHAR(tty)) {
send_signal:
			if (!L_NOFLSH(tty)) {
				n_tty_flush_buffer(tty);
				tty_driver_flush_buffer(tty);
			}
			if (I_IXON(tty))
				start_tty(tty);
			if (L_ECHO(tty)) {
				echo_char(c, tty);
				process_echoes(tty);
			}
			if (tty->pgrp)
				kill_pgrp(tty->pgrp, signal, 1);
			return;
		}
	}

	if (c == '\r') {
		if (I_IGNCR(tty))
			return;
		if (I_ICRNL(tty))
			c = '\n';
	} else if (c == '\n' && I_INLCR(tty))
		c = '\r';

	if (tty->icanon) {
		if (c == ERASE_CHAR(tty) || c == KILL_CHAR(tty) ||
		    (c == WERASE_CHAR(tty) && L_IEXTEN(tty))) {
			eraser(c, tty);
			process_echoes(tty);
			return;
		}
		if (c == LNEXT_CHAR(tty) && L_IEXTEN(tty)) {
			tty->lnext = 1;
			if (L_ECHO(tty)) {
				finish_erasing(tty);
				if (L_ECHOCTL(tty)) {
					echo_char_raw('^', tty);
					echo_char_raw('\b', tty);
					process_echoes(tty);
				}
			}
			return;
		}
		if (c == REPRINT_CHAR(tty) && L_ECHO(tty) &&
		    L_IEXTEN(tty)) {
			unsigned long tail = tty->canon_head;

			finish_erasing(tty);
			echo_char(c, tty);
			echo_char_raw('\n', tty);
			while (tail != tty->read_head) {
				echo_char(tty->read_buf[tail], tty);
				tail = (tail+1) & (N_TTY_BUF_SIZE-1);
			}
			process_echoes(tty);
			return;
		}
		if (c == '\n') {
			if (tty->read_cnt >= N_TTY_BUF_SIZE) {
				if (L_ECHO(tty))
					process_output('\a', tty);
				return;
			}
			if (L_ECHO(tty) || L_ECHONL(tty)) {
				echo_char_raw('\n', tty);
				process_echoes(tty);
			}
			goto handle_newline;
		}
		if (c == EOF_CHAR(tty)) {
			if (tty->read_cnt >= N_TTY_BUF_SIZE)
				return;
			if (tty->canon_head != tty->read_head)
				set_bit(TTY_PUSH, &tty->flags);
			c = __DISABLED_CHAR;
			goto handle_newline;
		}
		if ((c == EOL_CHAR(tty)) ||
		    (c == EOL2_CHAR(tty) && L_IEXTEN(tty))) {
			parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty))
				 ? 1 : 0;
			if (tty->read_cnt >= (N_TTY_BUF_SIZE - parmrk)) {
				if (L_ECHO(tty))
					process_output('\a', tty);
				return;
			}
			if (L_ECHO(tty)) {
				
				if (tty->canon_head == tty->read_head)
					echo_set_canon_col(tty);
				echo_char(c, tty);
				process_echoes(tty);
			}
			if (parmrk)
				put_tty_queue(c, tty);

handle_newline:
			spin_lock_irqsave(&tty->read_lock, flags);
			set_bit(tty->read_head, tty->read_flags);
			put_tty_queue_nolock(c, tty);
			tty->canon_head = tty->read_head;
			tty->canon_data++;
			spin_unlock_irqrestore(&tty->read_lock, flags);
			kill_fasync(&tty->fasync, SIGIO, POLL_IN);
			if (waitqueue_active(&tty->read_wait))
				wake_up_interruptible(&tty->read_wait);
			return;
		}
	}

	parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty)) ? 1 : 0;
	if (tty->read_cnt >= (N_TTY_BUF_SIZE - parmrk - 1)) {
		
		if (L_ECHO(tty))
			process_output('\a', tty);
		return;
	}
	if (L_ECHO(tty)) {
		finish_erasing(tty);
		if (c == '\n')
			echo_char_raw('\n', tty);
		else {
			
			if (tty->canon_head == tty->read_head)
				echo_set_canon_col(tty);
			echo_char(c, tty);
		}
		process_echoes(tty);
	}

	if (parmrk)
		put_tty_queue(c, tty);

	put_tty_queue(c, tty);
}
Пример #3
0
static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
{
	unsigned long flags;

	if (tty->raw) {
		put_tty_queue(c, tty);
		return;
	}
	
	if (tty->stopped && !tty->flow_stopped &&
	    I_IXON(tty) && I_IXANY(tty)) {
		start_tty(tty);
		return;
	}
	
	if (I_ISTRIP(tty))
		c &= 0x7f;
	if (I_IUCLC(tty) && L_IEXTEN(tty))
		c=tolower(c);

	if (tty->closing) {
		if (I_IXON(tty)) {
			if (c == START_CHAR(tty))
				start_tty(tty);
			else if (c == STOP_CHAR(tty))
				stop_tty(tty);
		}
		return;
	}

	/*
	 * If the previous character was LNEXT, or we know that this
	 * character is not one of the characters that we'll have to
	 * handle specially, do shortcut processing to speed things
	 * up.
	 */
	if (!test_bit(c, &tty->process_char_map) || tty->lnext) {
		finish_erasing(tty);
		tty->lnext = 0;
		if (L_ECHO(tty)) {
			if (tty->read_cnt >= N_TTY_BUF_SIZE-1) {
				put_char('\a', tty); /* beep if no space */
				return;
			}
			/* Record the column of first canon char. */
			if (tty->canon_head == tty->read_head)
				tty->canon_column = tty->column;
			echo_char(c, tty);
		}
		if (I_PARMRK(tty) && c == (unsigned char) '\377')
			put_tty_queue(c, tty);
		put_tty_queue(c, tty);
		return;
	}
		
	if (c == '\r') {
		if (I_IGNCR(tty))
			return;
		if (I_ICRNL(tty))
			c = '\n';
	} else if (c == '\n' && I_INLCR(tty))
		c = '\r';
	if (I_IXON(tty)) {
		if (c == START_CHAR(tty)) {
			start_tty(tty);
			return;
		}
		if (c == STOP_CHAR(tty)) {
			stop_tty(tty);
			return;
		}
	}
	if (L_ISIG(tty)) {
		int signal;
		signal = SIGINT;
		if (c == INTR_CHAR(tty))
			goto send_signal;
		signal = SIGQUIT;
		if (c == QUIT_CHAR(tty))
			goto send_signal;
		signal = SIGTSTP;
		if (c == SUSP_CHAR(tty)) {
send_signal:
			isig(signal, tty, 0);
			return;
		}
	}
	if (tty->icanon) {
		if (c == ERASE_CHAR(tty) || c == KILL_CHAR(tty) ||
		    (c == WERASE_CHAR(tty) && L_IEXTEN(tty))) {
			eraser(c, tty);
			return;
		}
		if (c == LNEXT_CHAR(tty) && L_IEXTEN(tty)) {
			tty->lnext = 1;
			if (L_ECHO(tty)) {
				finish_erasing(tty);
				if (L_ECHOCTL(tty)) {
					put_char('^', tty);
					put_char('\b', tty);
				}
			}
			return;
		}
		if (c == REPRINT_CHAR(tty) && L_ECHO(tty) &&
		    L_IEXTEN(tty)) {
			unsigned long tail = tty->canon_head;

			finish_erasing(tty);
			echo_char(c, tty);
			opost('\n', tty);
			while (tail != tty->read_head) {
				echo_char(tty->read_buf[tail], tty);
				tail = (tail+1) & (N_TTY_BUF_SIZE-1);
			}
			return;
		}
		if (c == '\n') {
			if (L_ECHO(tty) || L_ECHONL(tty)) {
				if (tty->read_cnt >= N_TTY_BUF_SIZE-1) {
					put_char('\a', tty);
					return;
				}
				opost('\n', tty);
			}
			goto handle_newline;
		}
		if (c == EOF_CHAR(tty)) {
		        if (tty->canon_head != tty->read_head)
			        set_bit(TTY_PUSH, &tty->flags);
			c = __DISABLED_CHAR;
			goto handle_newline;
		}
		if ((c == EOL_CHAR(tty)) ||
		    (c == EOL2_CHAR(tty) && L_IEXTEN(tty))) {
			/*
			 * XXX are EOL_CHAR and EOL2_CHAR echoed?!?
			 */
			if (L_ECHO(tty)) {
				if (tty->read_cnt >= N_TTY_BUF_SIZE-1) {
					put_char('\a', tty);
					return;
				}
				/* Record the column of first canon char. */
				if (tty->canon_head == tty->read_head)
					tty->canon_column = tty->column;
				echo_char(c, tty);
			}
			/*
			 * XXX does PARMRK doubling happen for
			 * EOL_CHAR and EOL2_CHAR?
			 */
			if (I_PARMRK(tty) && c == (unsigned char) '\377')
				put_tty_queue(c, tty);

		handle_newline:
			spin_lock_irqsave(&tty->read_lock, flags);
			set_bit(tty->read_head, &tty->read_flags);
			put_tty_queue_nolock(c, tty);
			tty->canon_head = tty->read_head;
			tty->canon_data++;
			spin_unlock_irqrestore(&tty->read_lock, flags);
			kill_fasync(&tty->fasync, SIGIO, POLL_IN);
			if (waitqueue_active(&tty->read_wait))
				wake_up_interruptible(&tty->read_wait);
			return;
		}
	}
	
	finish_erasing(tty);
	if (L_ECHO(tty)) {
		if (tty->read_cnt >= N_TTY_BUF_SIZE-1) {
			put_char('\a', tty); /* beep if no space */
			return;
		}
		if (c == '\n')
			opost('\n', tty);
		else {
			/* Record the column of first canon char. */
			if (tty->canon_head == tty->read_head)
				tty->canon_column = tty->column;
			echo_char(c, tty);
		}
	}

	if (I_PARMRK(tty) && c == (unsigned char) '\377')
		put_tty_queue(c, tty);

	put_tty_queue(c, tty);
}	
Пример #4
0
static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old)
{
	int canon_change = 1;
	BUG_ON(!tty);

	if (old)
		canon_change = (old->c_lflag ^ tty->termios->c_lflag) & ICANON;
	if (canon_change) {
		memset(&tty->read_flags, 0, sizeof tty->read_flags);
		tty->canon_head = tty->read_tail;
		tty->canon_data = 0;
		tty->erasing = 0;
	}

	if (canon_change && !L_ICANON(tty) && tty->read_cnt)
		wake_up_interruptible(&tty->read_wait);

	tty->icanon = (L_ICANON(tty) != 0);
	if (test_bit(TTY_HW_COOK_IN, &tty->flags)) {
		tty->raw = 1;
		tty->real_raw = 1;
		n_tty_set_room(tty);
		return;
	}
	if (I_ISTRIP(tty) || I_IUCLC(tty) || I_IGNCR(tty) ||
	    I_ICRNL(tty) || I_INLCR(tty) || L_ICANON(tty) ||
	    I_IXON(tty) || L_ISIG(tty) || L_ECHO(tty) ||
	    I_PARMRK(tty)) {
		memset(tty->process_char_map, 0, 256/8);

		if (I_IGNCR(tty) || I_ICRNL(tty))
			set_bit('\r', tty->process_char_map);
		if (I_INLCR(tty))
			set_bit('\n', tty->process_char_map);

		if (L_ICANON(tty)) {
			set_bit(ERASE_CHAR(tty), tty->process_char_map);
			set_bit(KILL_CHAR(tty), tty->process_char_map);
			set_bit(EOF_CHAR(tty), tty->process_char_map);
			set_bit('\n', tty->process_char_map);
			set_bit(EOL_CHAR(tty), tty->process_char_map);
			if (L_IEXTEN(tty)) {
				set_bit(WERASE_CHAR(tty),
					tty->process_char_map);
				set_bit(LNEXT_CHAR(tty),
					tty->process_char_map);
				set_bit(EOL2_CHAR(tty),
					tty->process_char_map);
				if (L_ECHO(tty))
					set_bit(REPRINT_CHAR(tty),
						tty->process_char_map);
			}
		}
		if (I_IXON(tty)) {
			set_bit(START_CHAR(tty), tty->process_char_map);
			set_bit(STOP_CHAR(tty), tty->process_char_map);
		}
		if (L_ISIG(tty)) {
			set_bit(INTR_CHAR(tty), tty->process_char_map);
			set_bit(QUIT_CHAR(tty), tty->process_char_map);
			set_bit(SUSP_CHAR(tty), tty->process_char_map);
		}
		clear_bit(__DISABLED_CHAR, tty->process_char_map);
		tty->raw = 0;
		tty->real_raw = 0;
	} else {
		tty->raw = 1;
		if ((I_IGNBRK(tty) || (!I_BRKINT(tty) && !I_PARMRK(tty))) &&
		    (I_IGNPAR(tty) || !I_INPCK(tty)) &&
		    (tty->driver->flags & TTY_DRIVER_REAL_RAW))
			tty->real_raw = 1;
		else
			tty->real_raw = 0;
	}
	n_tty_set_room(tty);
	
	wake_up_interruptible(&tty->write_wait);
	wake_up_interruptible(&tty->read_wait);
}