diff options
Diffstat (limited to 'drivers/char/tty_io.c')
| -rw-r--r-- | drivers/char/tty_io.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c index 39db186d5c5..5d405a1bfbe 100644 --- a/drivers/char/tty_io.c +++ b/drivers/char/tty_io.c @@ -154,6 +154,7 @@ int tty_ioctl(struct inode * inode, struct file * file, static int tty_fasync(int fd, struct file * filp, int on); static void release_tty(struct tty_struct *tty, int idx); static void __proc_set_tty(struct task_struct *tsk, struct tty_struct *tty); +static void proc_set_tty(struct task_struct *tsk, struct tty_struct *tty); /** * alloc_tty_struct - allocate a tty object @@ -1558,6 +1559,18 @@ void disassociate_ctty(int on_exit) unlock_kernel(); } +/** + * + * no_tty - Ensure the current process does not have a controlling tty + */ +void no_tty(void) +{ + struct task_struct *tsk = current; + if (tsk->signal->leader) + disassociate_ctty(0); + proc_clear_tty(tsk); +} + /** * stop_tty - propogate flow control @@ -3280,9 +3293,7 @@ int tty_ioctl(struct inode * inode, struct file * file, case TIOCNOTTY: if (current->signal->tty != tty) return -ENOTTY; - if (current->signal->leader) - disassociate_ctty(0); - proc_clear_tty(current); + no_tty(); return 0; case TIOCSCTTY: return tiocsctty(tty, arg); @@ -3844,7 +3855,7 @@ static void __proc_set_tty(struct task_struct *tsk, struct tty_struct *tty) tsk->signal->tty_old_pgrp = NULL; } -void proc_set_tty(struct task_struct *tsk, struct tty_struct *tty) +static void proc_set_tty(struct task_struct *tsk, struct tty_struct *tty) { spin_lock_irq(&tsk->sighand->siglock); __proc_set_tty(tsk, tty); |