getty: Disable VINTR + VEOF, re-enable before calling /bin/login

This patch makes the Finit built-in getty behave a bit more like other
getty implementations.  We now not only disable ISIG but also VEOF and
VINTR when prearing the TTY for the getty (built-in or external).

Like before, it is up to the getty process to leave the TTY in a
usable state to /bin/login, so we also move the stty() call to
just before calling /bin/login in getty.c

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

src/getty.c

@@ -300,18 +300,20 @@ int getty(char *tty, char *baud, char *term, char *user)
 	sigaction(SIGINT,  &sa, NULL);
 	sigaction(SIGQUIT, &sa, NULL);
 
-	/* Set up TTY */
-	stty(fd, speed);
-	close(fd);
+	/* The getty process is responsible for the UTMP login record */
 	utmp_set_login(tty, NULL);
-	if (term)
-		setenv("TERM", term, 1);
-
 	if (!user)
 		do_getty(tty, name, sizeof(name));
 	else
 		strlcpy(name, user, sizeof(name));
 
+	/* Set up TTY, re-enabling ISIG et al. */
+	stty(fd, speed);
+	close(fd);
+
+	if (term)
+		setenv("TERM", term, 1);
+
 	return do_login(name);
 }