From f753f3272b4d2108d1e4b121ddcde504737a8693 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Tue, 26 Aug 2008 19:52:47 +0100 Subject: [PATCH] tty: TIOCGSOFTCAR/SSOFTCAR on pty is wron The termios settings ioctls on a pty should affect the bound tty side not the pty. The SOFTCAR ioctls use the wrong device file. Signed-off-by: Alan Cox Signed-off-by: Linus Torvalds --- drivers/char/tty_ioctl.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c index ea9fc5d03b9..bf34e459742 100644 --- a/drivers/char/tty_ioctl.c +++ b/drivers/char/tty_ioctl.c @@ -937,12 +937,14 @@ int tty_mode_ioctl(struct tty_struct *tty, struct file *file, return 0; #endif case TIOCGSOFTCAR: - return put_user(C_CLOCAL(tty) ? 1 : 0, + /* FIXME: for correctness we may need to take the termios + lock here - review */ + return put_user(C_CLOCAL(real_tty) ? 1 : 0, (int __user *)arg); case TIOCSSOFTCAR: if (get_user(arg, (unsigned int __user *) arg)) return -EFAULT; - return tty_change_softcar(tty, arg); + return tty_change_softcar(real_tty, arg); default: return -ENOIOCTLCMD; } -- 2.41.0