int buflen);
extern void tty_write_message(struct tty_struct *tty, char *msg);
-extern void tty_get_termios(struct tty_driver *drv, int idx, struct termios *tio);
-
extern int is_orphaned_pgrp(int pgrp);
extern int is_ignored(int sig);
extern int tty_signal(int sig, struct tty_struct *tty);