diff options
Diffstat (limited to 'drivers/char/pty.c')
| -rw-r--r-- | drivers/char/pty.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/char/pty.c b/drivers/char/pty.c index d83a43130df4..b640ef29be1c 100644 --- a/drivers/char/pty.c +++ b/drivers/char/pty.c @@ -171,6 +171,23 @@ static int pty_set_lock(struct tty_struct *tty, int __user *arg) return 0; } +/* Send a signal to the slave */ +static int pty_signal(struct tty_struct *tty, int sig) +{ + unsigned long flags; + struct pid *pgrp; + + if (tty->link) { + spin_lock_irqsave(&tty->link->ctrl_lock, flags); + pgrp = get_pid(tty->link->pgrp); + spin_unlock_irqrestore(&tty->link->ctrl_lock, flags); + + kill_pgrp(pgrp, sig, 1); + put_pid(pgrp); + } + return 0; +} + static void pty_flush_buffer(struct tty_struct *tty) { struct tty_struct *to = tty->link; @@ -321,6 +338,8 @@ static int pty_bsd_ioctl(struct tty_struct *tty, struct file *file, switch (cmd) { case TIOCSPTLCK: /* Set PT Lock (disallow slave open) */ return pty_set_lock(tty, (int __user *) arg); + case TIOCSIG: /* Send signal to other side of pty */ + return pty_signal(tty, (int) arg); } return -ENOIOCTLCMD; } @@ -476,6 +495,8 @@ static int pty_unix98_ioctl(struct tty_struct *tty, struct file *file, return pty_set_lock(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 */ + return pty_signal(tty, (int) arg); } return -ENOIOCTLCMD; |