struct chan_opts *opts);
extern int line_setup(struct line *lines, int num, char *init,
int all_allowed);
-extern int line_write(struct line *line, struct tty_struct *tty, const char *buf, int len);
+extern int line_write(struct line *line, struct tty_struct *tty, int from_user,
+ const char *buf, int len);
extern int line_write_room(struct tty_struct *tty);
extern char *add_xterm_umid(char *base);
extern int line_setup_irq(int fd, int input, int output, void *data);