diff options
Diffstat (limited to 'drivers/tty/pty.c')
| -rw-r--r-- | drivers/tty/pty.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index 4219f040adb8..df3c64272d21 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -171,6 +171,28 @@ static int pty_set_lock(struct tty_struct *tty, int __user *arg) return 0; } +/* Set the packet mode on a pty */ +static int pty_set_pktmode(struct tty_struct *tty, int __user *arg) +{ + unsigned long flags; + int pktmode; + + if (get_user(pktmode, arg)) + return -EFAULT; + + spin_lock_irqsave(&tty->ctrl_lock, flags); + if (pktmode) { + if (!tty->packet) { + tty->packet = 1; + tty->link->ctrl_status = 0; + } + } else + tty->packet = 0; + spin_unlock_irqrestore(&tty->ctrl_lock, flags); + + return 0; +} + /* Send a signal to the slave */ static int pty_signal(struct tty_struct *tty, int sig) { @@ -398,6 +420,8 @@ static int pty_bsd_ioctl(struct tty_struct *tty, switch (cmd) { case TIOCSPTLCK: /* Set PT Lock (disallow slave open) */ return pty_set_lock(tty, (int __user *) arg); + case TIOCPKT: /* Set PT packet mode */ + return pty_set_pktmode(tty, (int __user *)arg); case TIOCSIG: /* Send signal to other side of pty */ return pty_signal(tty, (int) arg); } @@ -512,6 +536,8 @@ static int pty_unix98_ioctl(struct tty_struct *tty, switch (cmd) { case TIOCSPTLCK: /* Set PT Lock (disallow slave open) */ return pty_set_lock(tty, (int __user *)arg); + case TIOCPKT: /* Set PT packet mode */ + return pty_set_pktmode(tty, (int __user *)arg); case TIOCGPTN: /* Get PT Number */ return put_user(tty->index, (unsigned int __user *)arg); case TIOCSIG: /* Send signal to other side of pty */ |