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path: root/drivers/char/pty.c
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Diffstat (limited to 'drivers/char/pty.c')
-rw-r--r--drivers/char/pty.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/char/pty.c b/drivers/char/pty.c
index d83a43130df..b640ef29be1 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;