9 files changed, 13 insertions, 0 deletions

diff --git a/arch/alpha/include/asm/ioctls.h b/arch/alpha/include/asm/ioctls.h
index 034b6cf5d9f3..80e1cee90f1f 100644
--- a/arch/alpha/include/asm/ioctls.h
+++ b/arch/alpha/include/asm/ioctls.h
@@ -94,6 +94,7 @@
 #define TIOCSPTLCK      _IOW('T',0x31, int)  /* Lock/unlock Pty */
 #define TIOCGDEV        _IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
 #define TIOCSIG         _IOW('T',0x36, int)  /* Generate signal on Pty slave */
+#define TIOCVHANGUP     0x5437
 
 #define TIOCSERCONFIG   0x5453
 #define TIOCSERGWILD    0x5454
diff --git a/arch/mips/include/asm/ioctls.h b/arch/mips/include/asm/ioctls.h
index d967b8997626..92403c3d6007 100644
--- a/arch/mips/include/asm/ioctls.h
+++ b/arch/mips/include/asm/ioctls.h
@@ -85,6 +85,7 @@
 #define TIOCSPTLCK      _IOW('T', 0x31, int)  /* Lock/unlock Pty */
 #define TIOCGDEV        _IOR('T', 0x32, unsigned int) /* Get primary device node of /dev/console */
 #define TIOCSIG         _IOW('T', 0x36, int)  /* Generate signal on Pty slave */
+#define TIOCVHANGUP     0x5437
 
 /* I hope the range from 0x5480 on is free ... */
 #define TIOCSCTTY       0x5480          /* become controlling tty */
diff --git a/arch/parisc/include/asm/ioctls.h b/arch/parisc/include/asm/ioctls.h
index 6ba80d03623a..054ec06f9e23 100644
--- a/arch/parisc/include/asm/ioctls.h
+++ b/arch/parisc/include/asm/ioctls.h
@@ -54,6 +54,7 @@
 #define TIOCSPTLCK      _IOW('T',0x31, int)  /* Lock/unlock Pty */
 #define TIOCGDEV        _IOR('T',0x32, int)  /* Get primary device node of /dev/console */
 #define TIOCSIG         _IOW('T',0x36, int)  /* Generate signal on Pty slave */
+#define TIOCVHANGUP     0x5437
 
 #define FIONCLEX        0x5450  /* these numbers need to be adjusted. */
 #define FIOCLEX         0x5451
diff --git a/arch/powerpc/include/asm/ioctls.h b/arch/powerpc/include/asm/ioctls.h
index c7dc17cf84f1..e9b78870aaab 100644
--- a/arch/powerpc/include/asm/ioctls.h
+++ b/arch/powerpc/include/asm/ioctls.h
@@ -96,6 +96,7 @@
 #define TIOCSPTLCK      _IOW('T',0x31, int)  /* Lock/unlock Pty */
 #define TIOCGDEV        _IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
 #define TIOCSIG         _IOW('T',0x36, int)  /* Generate signal on Pty slave */
+#define TIOCVHANGUP     0x5437
 
 #define TIOCSERCONFIG   0x5453
 #define TIOCSERGWILD    0x5454
diff --git a/arch/sh/include/asm/ioctls.h b/arch/sh/include/asm/ioctls.h
index 84e85a792638..a6769f352bf6 100644
--- a/arch/sh/include/asm/ioctls.h
+++ b/arch/sh/include/asm/ioctls.h
@@ -87,6 +87,7 @@
 #define TIOCSPTLCK      _IOW('T',0x31, int)  /* Lock/unlock Pty */
 #define TIOCGDEV        _IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
 #define TIOCSIG         _IOW('T',0x36, int)  /* Generate signal on Pty slave */
+#define TIOCVHANGUP     _IO('T', 0x37)
 
 #define TIOCSERCONFIG   _IO('T', 83) /* 0x5453 */
 #define TIOCSERGWILD    _IOR('T', 84,  int) /* 0x5454 */
diff --git a/arch/sparc/include/asm/ioctls.h b/arch/sparc/include/asm/ioctls.h
index ed3807b96bb5..28d0c8b02cc3 100644
--- a/arch/sparc/include/asm/ioctls.h
+++ b/arch/sparc/include/asm/ioctls.h
@@ -20,6 +20,7 @@
 #define TCSETSW2        _IOW('T', 14, struct termios2)
 #define TCSETSF2        _IOW('T', 15, struct termios2)
 #define TIOCGDEV        _IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
+#define TIOCVHANGUP     _IO('T', 0x37)
 
 /* Note that all the ioctls that are not available in Linux have a 
  * double underscore on the front to: a) avoid some programs to
diff --git a/arch/xtensa/include/asm/ioctls.h b/arch/xtensa/include/asm/ioctls.h
index ccf1800f0b0c..fd1d1369a407 100644
--- a/arch/xtensa/include/asm/ioctls.h
+++ b/arch/xtensa/include/asm/ioctls.h
@@ -100,6 +100,7 @@
 #define TIOCSPTLCK      _IOW('T',0x31, int)  /* Lock/unlock Pty */
 #define TIOCGDEV        _IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
 #define TIOCSIG         _IOW('T',0x36, int)  /* Generate signal on Pty slave */
+#define TIOCVHANGUP     _IO('T', 0x37)
 
 #define TIOCSERCONFIG   _IO('T', 83)
 #define TIOCSERGWILD    _IOR('T', 84,  int)
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 20a862a2a0c2..8ef2d69470ec 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -2626,6 +2626,11 @@ long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
                 return put_user(tty->ldisc->ops->num, (int __user *)p);
         case TIOCSETD:
                 return tiocsetd(tty, p);
+        case TIOCVHANGUP:
+                if (!capable(CAP_SYS_ADMIN))
+                        return -EPERM;
+                tty_vhangup(tty);
+                return 0;
         case TIOCGDEV:
         {
                 unsigned int ret = new_encode_dev(tty_devnum(real_tty));
diff --git a/include/asm-generic/ioctls.h b/include/asm-generic/ioctls.h
index 3f3f2d189fb8..199975fac395 100644
--- a/include/asm-generic/ioctls.h
+++ b/include/asm-generic/ioctls.h
@@ -73,6 +73,7 @@
 #define TCSETXF         0x5434
 #define TCSETXW         0x5435
 #define TIOCSIG         _IOW('T', 0x36, int)  /* pty: generate signal */
+#define TIOCVHANGUP     0x5437
 
 #define FIONCLEX        0x5450
 #define FIOCLEX         0x5451