tty: Add EXTPROC support for LINEMODE

[sfrench/cifs-2.6.git] / drivers / char / pty.c

diff --git a/drivers/char/pty.c b/drivers/char/pty.c
index d83a43130df433962d7b0764ef6fc9c59f781f81..b640ef29be1c8334883a23f1aa138312064994ad 100644 (file)
--- 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;