diff --git a/arch/alpha/include/asm/ioctls.h b/arch/alpha/include/asm/ioctls.h
index c7b0cc61ce5b00c32bf87b6942ba5e1b474c9339..59617c3c2be6a865d40dd64dcf9ae222c3c80389 100644
--- a/arch/alpha/include/asm/ioctls.h
+++ b/arch/alpha/include/asm/ioctls.h
@@ -80,6 +80,7 @@
 # define TIOCPKT_START		 8
 # define TIOCPKT_NOSTOP		16
 # define TIOCPKT_DOSTOP		32
+# define TIOCPKT_IOCTL		64
 
 
 #define TIOCNOTTY	0x5422
@@ -91,6 +92,7 @@
 #define TIOCGSID	0x5429  /* Return the session ID of FD */
 #define TIOCGPTN	_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
 #define TIOCSPTLCK	_IOW('T',0x31, int)  /* Lock/unlock Pty */
+#define TIOCSIG		_IOW('T',0x36, int)  /* Generate signal on Pty slave */
 
 #define TIOCSERCONFIG	0x5453
 #define TIOCSERGWILD	0x5454
diff --git a/arch/alpha/include/asm/termbits.h b/arch/alpha/include/asm/termbits.h
index ad854a4a3af63061290bd0fa02a0a58dc8f16bac..879dd35899218b850e154f64c4477375ca804432 100644
--- a/arch/alpha/include/asm/termbits.h
+++ b/arch/alpha/include/asm/termbits.h
@@ -180,6 +180,7 @@ struct ktermios {
 #define FLUSHO	0x00800000
 #define PENDIN	0x20000000
 #define IEXTEN	0x00000400
+#define EXTPROC	0x10000000
 
 /* Values for the ACTION argument to `tcflow'.  */
 #define	TCOOFF		0
diff --git a/arch/arm/include/asm/ioctls.h b/arch/arm/include/asm/ioctls.h
index 7f0b6d13296a4789f0e7f55faaf59c8fb3435914..0b30894b5482a3955917d7bbc52170e876af13ad 100644
--- a/arch/arm/include/asm/ioctls.h
+++ b/arch/arm/include/asm/ioctls.h
@@ -52,6 +52,7 @@
 #define TCSETSF2	_IOW('T',0x2D, struct termios2)
 #define TIOCGPTN	_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
 #define TIOCSPTLCK	_IOW('T',0x31, int)  /* Lock/unlock Pty */
+#define TIOCSIG		_IOW('T',0x36, int)  /* Generate signal on Pty slave */
 
 #define TIOCGRS485      0x542E
 #define TIOCSRS485      0x542F
@@ -81,6 +82,7 @@
 #define TIOCPKT_START		 8
 #define TIOCPKT_NOSTOP		16
 #define TIOCPKT_DOSTOP		32
+#define TIOCPKT_IOCTL		64
 
 #define TIOCSER_TEMT	0x01	/* Transmitter physically empty */
 
diff --git a/arch/arm/include/asm/termbits.h b/arch/arm/include/asm/termbits.h
index f784d11f40b5e630f50bf573c8139d16e0cf473d..704135d28d1d3a90d7d5bf32a0744bdf0c3383d9 100644
--- a/arch/arm/include/asm/termbits.h
+++ b/arch/arm/include/asm/termbits.h
@@ -177,6 +177,7 @@ struct ktermios {
 #define FLUSHO	0010000
 #define PENDIN	0040000
 #define IEXTEN	0100000
+#define EXTPROC	0200000
 
 /* tcflow() and TCXONC use these */
 #define	TCOOFF		0
diff --git a/arch/avr32/include/asm/ioctls.h b/arch/avr32/include/asm/ioctls.h
index 143dafb3997ef3afb5214b410f06bfa2c8cf7074..b7dd324b46a92d720f94c2713c7798c8364f09df 100644
--- a/arch/avr32/include/asm/ioctls.h
+++ b/arch/avr32/include/asm/ioctls.h
@@ -53,6 +53,7 @@
 #define TCSETSF2	_IOW('T',0x2D, struct termios2)
 #define TIOCGPTN	_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
 #define TIOCSPTLCK	_IOW('T',0x31, int)  /* Lock/unlock Pty */
+#define TIOCSIG		_IOW('T',0x36, int)  /* Generate signal on Pty slave */
 
 #define TIOCGRS485      0x542E
 #define TIOCSRS485      0x542F
@@ -82,6 +83,7 @@
 #define TIOCPKT_START		 8
 #define TIOCPKT_NOSTOP		16
 #define TIOCPKT_DOSTOP		32
+#define TIOCPKT_IOCTL		64
 
 #define TIOCSER_TEMT    0x01	/* Transmitter physically empty */
 
diff --git a/arch/avr32/include/asm/termbits.h b/arch/avr32/include/asm/termbits.h
index db2daab31fdb55d961cb2803dd90a740e55c0e97..366adc5ebb100db9924f584568327db7ab70672c 100644
--- a/arch/avr32/include/asm/termbits.h
+++ b/arch/avr32/include/asm/termbits.h
@@ -175,6 +175,7 @@ struct ktermios {
 #define FLUSHO	0010000
 #define PENDIN	0040000
 #define IEXTEN	0100000
+#define EXTPROC	0200000
 
 /* tcflow() and TCXONC use these */
 #define	TCOOFF		0
diff --git a/arch/cris/include/asm/ioctls.h b/arch/cris/include/asm/ioctls.h
index bb49142dc6abaf30b880dc3ec9da55aefdc69afc..c9129ed374430c5e7e497935cae36ca9df430a57 100644
--- a/arch/cris/include/asm/ioctls.h
+++ b/arch/cris/include/asm/ioctls.h
@@ -54,6 +54,7 @@
 #define TCSETSF2	_IOW('T',0x2D, struct termios2)
 #define TIOCGPTN	_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
 #define TIOCSPTLCK	_IOW('T',0x31, int)  /* Lock/unlock Pty */
+#define TIOCSIG		_IOW('T',0x36, int)  /* Generate signal on Pty slave */
 
 #define FIONCLEX	0x5450  /* these numbers need to be adjusted. */
 #define FIOCLEX		0x5451
@@ -85,6 +86,7 @@
 #define TIOCPKT_START		 8
 #define TIOCPKT_NOSTOP		16
 #define TIOCPKT_DOSTOP		32
+#define TIOCPKT_IOCTL		64
 
 #define TIOCSER_TEMT    0x01	/* Transmitter physically empty */
 
diff --git a/arch/cris/include/asm/termbits.h b/arch/cris/include/asm/termbits.h
index 66e1a7492a0c7aeeac549aaedaefb48e884e68a7..1c43bc874ccf2202e41800da881377f4d5b43078 100644
--- a/arch/cris/include/asm/termbits.h
+++ b/arch/cris/include/asm/termbits.h
@@ -214,6 +214,7 @@ struct ktermios {
 #define FLUSHO	0010000
 #define PENDIN	0040000
 #define IEXTEN	0100000
+#define EXTPROC	0200000
 
 /* tcflow() and TCXONC use these */
 #define	TCOOFF		0
diff --git a/arch/frv/include/asm/ioctls.h b/arch/frv/include/asm/ioctls.h
index d0c30e31fbda02d4898110e207af32298384eb2f..a993e3759ccf2bf926c1954c995ff462a55bfad1 100644
--- a/arch/frv/include/asm/ioctls.h
+++ b/arch/frv/include/asm/ioctls.h
@@ -53,6 +53,7 @@
 #define TCSETSF2	_IOW('T',0x2D, struct termios2)
 #define TIOCGPTN	_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
 #define TIOCSPTLCK	_IOW('T',0x31, int)  /* Lock/unlock Pty */
+#define TIOCSIG		_IOW('T',0x36, int)  /* Generate signal on Pty slave */
 
 #define FIONCLEX	0x5450  /* these numbers need to be adjusted. */
 #define FIOCLEX		0x5451
@@ -79,6 +80,7 @@
 #define TIOCPKT_START		 8
 #define TIOCPKT_NOSTOP		16
 #define TIOCPKT_DOSTOP		32
+#define TIOCPKT_IOCTL		64
 
 #define TIOCSER_TEMT    0x01	/* Transmitter physically empty */
 
diff --git a/arch/frv/include/asm/termbits.h b/arch/frv/include/asm/termbits.h
index 5568492b50860ba04c98e247ee18535f7f8d50be..7722e19cc349b2058ac02eb065df8e8a476a61d4 100644
--- a/arch/frv/include/asm/termbits.h
+++ b/arch/frv/include/asm/termbits.h
@@ -180,6 +180,7 @@ struct ktermios {
 #define FLUSHO	0010000
 #define PENDIN	0040000
 #define IEXTEN	0100000
+#define EXTPROC	0200000
 
 
 /* tcflow() and TCXONC use these */
diff --git a/arch/h8300/include/asm/ioctls.h b/arch/h8300/include/asm/ioctls.h
index 98a53d067269f60cf96e5629149da0bc9a80b910..b6b249f9f308baca0e898eda42e305f34d2ac35d 100644
--- a/arch/h8300/include/asm/ioctls.h
+++ b/arch/h8300/include/asm/ioctls.h
@@ -53,6 +53,7 @@
 #define TCSETSF2	_IOW('T',0x2D, struct termios2)
 #define TIOCGPTN	_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
 #define TIOCSPTLCK	_IOW('T',0x31, int)  /* Lock/unlock Pty */
+#define TIOCSIG		_IOW('T',0x36, int)  /* Generate signal on Pty slave */
 
 #define FIONCLEX	0x5450  /* these numbers need to be adjusted. */
 #define FIOCLEX		0x5451
@@ -79,6 +80,7 @@
 #define TIOCPKT_START		 8
 #define TIOCPKT_NOSTOP		16
 #define TIOCPKT_DOSTOP		32
+#define TIOCPKT_IOCTL		64
 
 #define TIOCSER_TEMT    0x01	/* Transmitter physically empty */
 
diff --git a/arch/h8300/include/asm/termbits.h b/arch/h8300/include/asm/termbits.h
index 31eca81db3f711d6ee2d61407981004d77030a9d..3287a6244d74c4c5fc0644e8d57c55b961f2e07a 100644
--- a/arch/h8300/include/asm/termbits.h
+++ b/arch/h8300/include/asm/termbits.h
@@ -179,6 +179,7 @@ struct ktermios {
 #define FLUSHO	0010000
 #define PENDIN	0040000
 #define IEXTEN	0100000
+#define EXTPROC	0200000
 
 
 /* tcflow() and TCXONC use these */
diff --git a/arch/ia64/include/asm/ioctls.h b/arch/ia64/include/asm/ioctls.h
index f0ee86c0b5f77331212a0f0569958f9beed643e7..b79c385114ef89ec7430827cc65ece50d67b0530 100644
--- a/arch/ia64/include/asm/ioctls.h
+++ b/arch/ia64/include/asm/ioctls.h
@@ -59,6 +59,7 @@
 #define TCSETSF2	_IOW('T',0x2D, struct termios2)
 #define TIOCGPTN	_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
 #define TIOCSPTLCK	_IOW('T',0x31, int)  /* Lock/unlock Pty */
+#define TIOCSIG		_IOW('T',0x36, int)  /* Generate signal on Pty slave */
 
 #define FIONCLEX	0x5450  /* these numbers need to be adjusted. */
 #define FIOCLEX		0x5451
@@ -85,6 +86,7 @@
 #define TIOCPKT_START		 8
 #define TIOCPKT_NOSTOP		16
 #define TIOCPKT_DOSTOP		32
+#define TIOCPKT_IOCTL		64
 
 #define TIOCSER_TEMT    0x01	/* Transmitter physically empty */
 
diff --git a/arch/ia64/include/asm/termbits.h b/arch/ia64/include/asm/termbits.h
index 9f162e0089ade2f66abf0d78cfe5456e0b6d3805..c009b94e58d913b17f00325647f31e0a27fdd0bc 100644
--- a/arch/ia64/include/asm/termbits.h
+++ b/arch/ia64/include/asm/termbits.h
@@ -187,6 +187,7 @@ struct ktermios {
 #define FLUSHO	0010000
 #define PENDIN	0040000
 #define IEXTEN	0100000
+#define EXTPROC	0200000
 
 /* tcflow() and TCXONC use these */
 #define	TCOOFF		0
diff --git a/arch/m32r/include/asm/ioctls.h b/arch/m32r/include/asm/ioctls.h
index f4c13a52fe48683792ea69d8cf50b46d41f28c50..66288063a4c0ef8bd1b2ac08e6630c842d88433e 100644
--- a/arch/m32r/include/asm/ioctls.h
+++ b/arch/m32r/include/asm/ioctls.h
@@ -53,6 +53,7 @@
 #define TCSETSF2	_IOW('T',0x2D, struct termios2)
 #define TIOCGPTN	_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
 #define TIOCSPTLCK	_IOW('T',0x31, int)  /* Lock/unlock Pty */
+#define TIOCSIG		_IOW('T',0x36, int)  /* Generate signal on Pty slave */
 
 #define FIONCLEX	0x5450
 #define FIOCLEX		0x5451
@@ -79,6 +80,7 @@
 #define TIOCPKT_START		 8
 #define TIOCPKT_NOSTOP		16
 #define TIOCPKT_DOSTOP		32
+#define TIOCPKT_IOCTL		64
 
 #define TIOCSER_TEMT    0x01	/* Transmitter physically empty */
 
diff --git a/arch/m32r/include/asm/termbits.h b/arch/m32r/include/asm/termbits.h
index bc104008b55b533af1f273dd7750279753566bd7..957a3c688549f48c1981dba0d0364bc0e6471513 100644
--- a/arch/m32r/include/asm/termbits.h
+++ b/arch/m32r/include/asm/termbits.h
@@ -179,6 +179,7 @@ struct ktermios {
 #define FLUSHO	0010000
 #define PENDIN	0040000
 #define IEXTEN	0100000
+#define EXTPROC	0200000
 
 /* tcflow() and TCXONC use these */
 #define	TCOOFF		0
diff --git a/arch/m68k/include/asm/ioctls.h b/arch/m68k/include/asm/ioctls.h
index b8d2f4be7fd74d97b8dcf3f38aefd02b440a921b..91a57d6654601df7863941d0d5bb030fe1f344ca 100644
--- a/arch/m68k/include/asm/ioctls.h
+++ b/arch/m68k/include/asm/ioctls.h
@@ -52,6 +52,7 @@
 #define TCSETSF2	_IOW('T',0x2D, struct termios2)
 #define TIOCGPTN	_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
 #define TIOCSPTLCK	_IOW('T',0x31, int)  /* Lock/unlock Pty */
+#define TIOCSIG		_IOW('T',0x36, int)  /* Generate signal on Pty slave */
 
 #define FIONCLEX	0x5450  /* these numbers need to be adjusted. */
 #define FIOCLEX		0x5451
@@ -78,6 +79,7 @@
 #define TIOCPKT_START		 8
 #define TIOCPKT_NOSTOP		16
 #define TIOCPKT_DOSTOP		32
+#define TIOCPKT_IOCTL		64
 
 #define TIOCSER_TEMT    0x01	/* Transmitter physically empty */
 
diff --git a/arch/m68k/include/asm/termbits.h b/arch/m68k/include/asm/termbits.h
index 8c14170996bb743da077b9dee455de66c6ad38b6..aea1e37b765a217981ca7a13b809061669698ebb 100644
--- a/arch/m68k/include/asm/termbits.h
+++ b/arch/m68k/include/asm/termbits.h
@@ -179,6 +179,7 @@ struct ktermios {
 #define FLUSHO	0010000
 #define PENDIN	0040000
 #define IEXTEN	0100000
+#define EXTPROC	0200000
 
 
 /* tcflow() and TCXONC use these */
diff --git a/arch/mips/include/asm/ioctls.h b/arch/mips/include/asm/ioctls.h
index 2fb9e1693bf7edbabbd69d40cee972118c8ef5df..d87cb0465693ab03dc9a11bd2b1bda0a3df9c26f 100644
--- a/arch/mips/include/asm/ioctls.h
+++ b/arch/mips/include/asm/ioctls.h
@@ -41,7 +41,7 @@
 #define	 TIOCPKT_START		0x08	/* start output */
 #define	 TIOCPKT_NOSTOP		0x10	/* no more ^S, ^Q */
 #define	 TIOCPKT_DOSTOP		0x20	/* now do ^S ^Q */
-/* #define  TIOCPKT_IOCTL		0x40	state change of pty driver */
+#define  TIOCPKT_IOCTL		0x40	/* state change of pty driver */
 #define TIOCSWINSZ	_IOW('t', 103, struct winsize)	/* set window size */
 #define TIOCGWINSZ	_IOR('t', 104, struct winsize)	/* get window size */
 #define TIOCNOTTY	0x5471		/* void tty association */
@@ -83,6 +83,7 @@
 #define TCSETSF2	_IOW('T', 0x2D, struct termios2)
 #define TIOCGPTN	_IOR('T', 0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
 #define TIOCSPTLCK	_IOW('T', 0x31, int)  /* Lock/unlock Pty */
+#define TIOCSIG		_IOW('T', 0x36, int)  /* Generate signal on Pty slave */
 
 /* I hope the range from 0x5480 on is free ... */
 #define TIOCSCTTY	0x5480		/* become controlling tty */
diff --git a/arch/mips/include/asm/termbits.h b/arch/mips/include/asm/termbits.h
index c83c68444e866c835af86a5f135ba1e238b9dfb8..76630b396fac3b2545fd9260b0addad0b04bd069 100644
--- a/arch/mips/include/asm/termbits.h
+++ b/arch/mips/include/asm/termbits.h
@@ -203,6 +203,7 @@ struct ktermios {
 #define PENDIN	0040000		/* Retype pending input (state).  */
 #define TOSTOP	0100000		/* Send SIGTTOU for background output.  */
 #define ITOSTOP	TOSTOP
+#define EXTPROC	0200000		/* External processing on pty */
 
 /* ioctl (fd, TIOCSERGETLSR, &result) where result may be as below */
 #define TIOCSER_TEMT    0x01	/* Transmitter physically empty */
diff --git a/arch/mn10300/include/asm/ioctls.h b/arch/mn10300/include/asm/ioctls.h
index 638219a99b1e0cbab3af5c0a17813da29c54d821..cb8cf19022347892c7a3bb49c8a718ed1ad03531 100644
--- a/arch/mn10300/include/asm/ioctls.h
+++ b/arch/mn10300/include/asm/ioctls.h
@@ -54,6 +54,7 @@
 #define TIOCGPTN	_IOR('T', 0x30, unsigned int) /* Get Pty Number
 						       * (of pty-mux device) */
 #define TIOCSPTLCK	_IOW('T', 0x31, int)  /* Lock/unlock Pty */
+#define TIOCSIG		_IOW('T', 0x36, int)  /* Generate signal on Pty slave */
 
 #define FIONCLEX	0x5450
 #define FIOCLEX		0x5451
@@ -80,6 +81,7 @@
 #define TIOCPKT_START		 8
 #define TIOCPKT_NOSTOP		16
 #define TIOCPKT_DOSTOP		32
+#define TIOCPKT_IOCTL		64
 
 #define TIOCSER_TEMT    0x01	/* Transmitter physically empty */
 
diff --git a/arch/mn10300/include/asm/termbits.h b/arch/mn10300/include/asm/termbits.h
index eb2b0dc1f696fb7c5e4fe5e823c3924a452eb54c..130d42495972d3f31cb8e7b473c18313f3329cca 100644
--- a/arch/mn10300/include/asm/termbits.h
+++ b/arch/mn10300/include/asm/termbits.h
@@ -180,6 +180,7 @@ struct ktermios {
 #define FLUSHO	0010000
 #define PENDIN	0040000
 #define IEXTEN	0100000
+#define EXTPROC	0200000
 
 /* tcflow() and TCXONC use these */
 #define	TCOOFF		0
diff --git a/arch/parisc/include/asm/ioctls.h b/arch/parisc/include/asm/ioctls.h
index 6cc497e52532039a10dced5f4c825f9cc8944c0b..4e0614456bea47ecbaf26c7f0b537792b6d12b2c 100644
--- a/arch/parisc/include/asm/ioctls.h
+++ b/arch/parisc/include/asm/ioctls.h
@@ -52,6 +52,7 @@
 #define TCSETSF2	_IOW('T',0x2D, struct termios2)
 #define TIOCGPTN	_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
 #define TIOCSPTLCK	_IOW('T',0x31, int)  /* Lock/unlock Pty */
+#define TIOCSIG		_IOW('T',0x36, int)  /* Generate signal on Pty slave */
 
 #define FIONCLEX	0x5450  /* these numbers need to be adjusted. */
 #define FIOCLEX		0x5451
@@ -82,6 +83,7 @@
 #define TIOCPKT_START		 8
 #define TIOCPKT_NOSTOP		16
 #define TIOCPKT_DOSTOP		32
+#define TIOCPKT_IOCTL		64
 
 #define TIOCSER_TEMT    0x01	/* Transmitter physically empty */
 
diff --git a/arch/parisc/include/asm/termbits.h b/arch/parisc/include/asm/termbits.h
index d8bbc73b16b7f6915e85b8108d31e5b3199d9ca2..d1ab92177a5c130212ff11b89027a229d766ccd8 100644
--- a/arch/parisc/include/asm/termbits.h
+++ b/arch/parisc/include/asm/termbits.h
@@ -180,6 +180,7 @@ struct ktermios {
 #define FLUSHO  0010000
 #define PENDIN  0040000
 #define IEXTEN  0100000
+#define EXTPROC	0200000
 
 /* tcflow() and TCXONC use these */
 #define	TCOOFF		0
diff --git a/arch/powerpc/include/asm/ioctls.h b/arch/powerpc/include/asm/ioctls.h
index 1842186d872c33818d862cff49ecc882dd7347cb..851920052e087490a3b32175465f3d63ae00b757 100644
--- a/arch/powerpc/include/asm/ioctls.h
+++ b/arch/powerpc/include/asm/ioctls.h
@@ -80,6 +80,7 @@
 # define TIOCPKT_START		 8
 # define TIOCPKT_NOSTOP		16
 # define TIOCPKT_DOSTOP		32
+# define TIOCPKT_IOCTL		64
 
 
 #define TIOCNOTTY	0x5422
@@ -93,6 +94,7 @@
 #define TIOCSRS485	0x542f
 #define TIOCGPTN	_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
 #define TIOCSPTLCK	_IOW('T',0x31, int)  /* Lock/unlock Pty */
+#define TIOCSIG		_IOW('T',0x36, int)  /* Generate signal on Pty slave */
 
 #define TIOCSERCONFIG	0x5453
 #define TIOCSERGWILD	0x5454
diff --git a/arch/powerpc/include/asm/termbits.h b/arch/powerpc/include/asm/termbits.h
index 6698188ca550aabc84ecadb7b0e7019be336734d..549d700e18f24c3e1bba536902958ab609e922bc 100644
--- a/arch/powerpc/include/asm/termbits.h
+++ b/arch/powerpc/include/asm/termbits.h
@@ -189,6 +189,7 @@ struct ktermios {
 #define FLUSHO	0x00800000
 #define PENDIN	0x20000000
 #define IEXTEN	0x00000400
+#define EXTPROC	0x10000000
 
 /* Values for the ACTION argument to `tcflow'.  */
 #define	TCOOFF		0
diff --git a/arch/s390/include/asm/ioctls.h b/arch/s390/include/asm/ioctls.h
index 40e481b1b4613777e19a555a2814597ac7a6f7b8..2f3d8736361f0d88293ff0c65b7a9862baf4b32d 100644
--- a/arch/s390/include/asm/ioctls.h
+++ b/arch/s390/include/asm/ioctls.h
@@ -60,6 +60,7 @@
 #define TCSETSF2	_IOW('T',0x2D, struct termios2)
 #define TIOCGPTN	_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
 #define TIOCSPTLCK	_IOW('T',0x31, int)  /* Lock/unlock Pty */
+#define TIOCSIG		_IOW('T',0x36, int)  /* Generate signal on Pty slave */
 
 #define FIONCLEX	0x5450  /* these numbers need to be adjusted. */
 #define FIOCLEX		0x5451
@@ -86,6 +87,7 @@
 #define TIOCPKT_START		 8
 #define TIOCPKT_NOSTOP		16
 #define TIOCPKT_DOSTOP		32
+#define TIOCPKT_IOCTL		64
 
 #define TIOCSER_TEMT    0x01	/* Transmitter physically empty */
 
diff --git a/arch/sh/include/asm/ioctls.h b/arch/sh/include/asm/ioctls.h
index c212c371a4a5702634c16eee6c67483231581561..eb6c4c68797224cf365caeaf761faeacc76b6b14 100644
--- a/arch/sh/include/asm/ioctls.h
+++ b/arch/sh/include/asm/ioctls.h
@@ -69,6 +69,7 @@
 # define TIOCPKT_START		 8
 # define TIOCPKT_NOSTOP		16
 # define TIOCPKT_DOSTOP		32
+# define TIOCPKT_IOCTL		64
 
 
 #define TIOCNOTTY	_IO('T', 34) /* 0x5422 */
@@ -84,6 +85,7 @@
 #define TCSETSF2	_IOW('T', 45, struct termios2)
 #define TIOCGPTN	_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
 #define TIOCSPTLCK	_IOW('T',0x31, int)  /* Lock/unlock Pty */
+#define TIOCSIG		_IOW('T',0x36, int)  /* Generate signal on Pty slave */
 
 #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 1fe6855c5c1896dccae71b86d359db3dd826e5be..53f4ee009bdda24e03e732524b7a16e93fd784bd 100644
--- a/arch/sparc/include/asm/ioctls.h
+++ b/arch/sparc/include/asm/ioctls.h
@@ -80,6 +80,7 @@
 /* Get minor device of a pty master's FD -- Solaris equiv is ISPTM */
 #define TIOCGPTN	_IOR('t', 134, unsigned int) /* Get Pty Number */
 #define TIOCSPTLCK	_IOW('t', 135, int) /* Lock/unlock PTY */
+#define TIOCSIG		_IOW('t', 136, int) /* Generate signal on Pty slave */
 
 /* Little f */
 #define FIOCLEX		_IO('f', 1)
@@ -132,5 +133,6 @@
 #define TIOCPKT_START		 8
 #define TIOCPKT_NOSTOP		16
 #define TIOCPKT_DOSTOP		32
+#define TIOCPKT_IOCTL		64
 
 #endif /* !(_ASM_SPARC_IOCTLS_H) */
diff --git a/arch/sparc/include/asm/termbits.h b/arch/sparc/include/asm/termbits.h
index d72dfed1f9d7e6fc67106f2a17aeeba8d8662d0a..23b10ff08df2c0196b4fe1d9717faff30ddbb0d5 100644
--- a/arch/sparc/include/asm/termbits.h
+++ b/arch/sparc/include/asm/termbits.h
@@ -225,6 +225,7 @@ struct ktermios {
 #define FLUSHO	0x00002000
 #define PENDIN	0x00004000
 #define IEXTEN	0x00008000
+#define EXTPROC	0x00010000
 
 /* modem lines */
 #define TIOCM_LE	0x001
diff --git a/arch/xtensa/include/asm/ioctls.h b/arch/xtensa/include/asm/ioctls.h
index 0ffa942954b9ba445000e8d063f3e38f572ab738..ab1800012ed9090b3b4902af53d74d25f2f639b6 100644
--- a/arch/xtensa/include/asm/ioctls.h
+++ b/arch/xtensa/include/asm/ioctls.h
@@ -81,6 +81,7 @@
 # define TIOCPKT_START		 8
 # define TIOCPKT_NOSTOP		16
 # define TIOCPKT_DOSTOP		32
+# define TIOCPKT_IOCTL		64
 
 
 #define TIOCNOTTY	_IO('T', 34)
@@ -97,6 +98,7 @@
 #define TCSETSF2	_IOW('T', 45, struct termios2)
 #define TIOCGPTN	_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
 #define TIOCSPTLCK	_IOW('T',0x31, int)  /* Lock/unlock Pty */
+#define TIOCSIG		_IOW('T',0x36, int)  /* Generate signal on Pty slave */
 
 #define TIOCSERCONFIG	_IO('T', 83)
 #define TIOCSERGWILD	_IOR('T', 84,  int)
diff --git a/arch/xtensa/include/asm/termbits.h b/arch/xtensa/include/asm/termbits.h
index 85aa6a3c0b6e677ca3e7c70a9374568897c28acd..0d6c8715b24f7fc4683fa5e5b0d9d3156dd8a897 100644
--- a/arch/xtensa/include/asm/termbits.h
+++ b/arch/xtensa/include/asm/termbits.h
@@ -196,6 +196,7 @@ struct ktermios {
 #define FLUSHO	0010000
 #define PENDIN	0040000
 #define IEXTEN	0100000
+#define EXTPROC	0200000
 
 /* tcflow() and TCXONC use these */
 
diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c
index bdae8327143c3400497829c6080817535af52eb2..428f4fe0b5f745f81ee0e076b2e20d3717115b99 100644
--- a/drivers/char/n_tty.c
+++ b/drivers/char/n_tty.c
@@ -1102,6 +1102,11 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
 	if (I_IUCLC(tty) && L_IEXTEN(tty))
 		c = tolower(c);
 
+	if (L_EXTPROC(tty)) {
+		put_tty_queue(c, tty);
+		return;
+	}
+
 	if (tty->stopped && !tty->flow_stopped && I_IXON(tty) &&
 	    I_IXANY(tty) && c != START_CHAR(tty) && c != STOP_CHAR(tty) &&
 	    c != INTR_CHAR(tty) && c != QUIT_CHAR(tty) && c != SUSP_CHAR(tty)) {
@@ -1409,7 +1414,8 @@ static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
 
 	n_tty_set_room(tty);
 
-	if (!tty->icanon && (tty->read_cnt >= tty->minimum_to_wake)) {
+	if ((!tty->icanon && (tty->read_cnt >= tty->minimum_to_wake)) ||
+		L_EXTPROC(tty)) {
 		kill_fasync(&tty->fasync, SIGIO, POLL_IN);
 		if (waitqueue_active(&tty->read_wait))
 			wake_up_interruptible(&tty->read_wait);
@@ -1585,7 +1591,7 @@ static int n_tty_open(struct tty_struct *tty)
 static inline int input_available_p(struct tty_struct *tty, int amt)
 {
 	tty_flush_to_ldisc(tty);
-	if (tty->icanon) {
+	if (tty->icanon && !L_EXTPROC(tty)) {
 		if (tty->canon_data)
 			return 1;
 	} else if (tty->read_cnt >= (amt ? amt : 1))
@@ -1632,6 +1638,11 @@ static int copy_from_read_buf(struct tty_struct *tty,
 		spin_lock_irqsave(&tty->read_lock, flags);
 		tty->read_tail = (tty->read_tail + n) & (N_TTY_BUF_SIZE-1);
 		tty->read_cnt -= n;
+		/* Turn single EOF into zero-length read */
+		if (L_EXTPROC(tty) && tty->icanon && n == 1) {
+			if (!tty->read_cnt && (*b)[n-1] == EOF_CHAR(tty))
+				n--;
+		}
 		spin_unlock_irqrestore(&tty->read_lock, flags);
 		*b += n;
 		*nr -= n;
@@ -1812,7 +1823,7 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
 			nr--;
 		}
 
-		if (tty->icanon) {
+		if (tty->icanon && !L_EXTPROC(tty)) {
 			/* N.B. avoid overrun if nr == 0 */
 			while (nr && tty->read_cnt) {
 				int eol;
diff --git a/drivers/char/pty.c b/drivers/char/pty.c
index d83a43130df433962d7b0764ef6fc9c59f781f81..b640ef29be1c8334883a23f1aa138312064994ad 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;
diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c
index 6bd5f8866c74b2ed85526a7ffe6465b370d7ce4c..0c18899714593325fa4e51f3235ad5a23e9ed0c4 100644
--- a/drivers/char/tty_ioctl.c
+++ b/drivers/char/tty_ioctl.c
@@ -517,19 +517,25 @@ static void change_termios(struct tty_struct *tty, struct ktermios *new_termios)
 
 	/* See if packet mode change of state. */
 	if (tty->link && tty->link->packet) {
+		int extproc = (old_termios.c_lflag & EXTPROC) |
+				(tty->termios->c_lflag & EXTPROC);
 		int old_flow = ((old_termios.c_iflag & IXON) &&
 				(old_termios.c_cc[VSTOP] == '\023') &&
 				(old_termios.c_cc[VSTART] == '\021'));
 		int new_flow = (I_IXON(tty) &&
 				STOP_CHAR(tty) == '\023' &&
 				START_CHAR(tty) == '\021');
-		if (old_flow != new_flow) {
+		if ((old_flow != new_flow) || extproc) {
 			spin_lock_irqsave(&tty->ctrl_lock, flags);
-			tty->ctrl_status &= ~(TIOCPKT_DOSTOP | TIOCPKT_NOSTOP);
-			if (new_flow)
-				tty->ctrl_status |= TIOCPKT_DOSTOP;
-			else
-				tty->ctrl_status |= TIOCPKT_NOSTOP;
+			if (old_flow != new_flow) {
+				tty->ctrl_status &= ~(TIOCPKT_DOSTOP | TIOCPKT_NOSTOP);
+				if (new_flow)
+					tty->ctrl_status |= TIOCPKT_DOSTOP;
+				else
+					tty->ctrl_status |= TIOCPKT_NOSTOP;
+			}
+			if (extproc)
+				tty->ctrl_status |= TIOCPKT_IOCTL;
 			spin_unlock_irqrestore(&tty->ctrl_lock, flags);
 			wake_up_interruptible(&tty->link->read_wait);
 		}
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index 63ae85831464a7741d89f7160e3cd93512332a4a..fa4bc48810fda8519f8fb3536ed48a965f35db99 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -969,6 +969,7 @@ COMPATIBLE_IOCTL(TIOCGPGRP)
 COMPATIBLE_IOCTL(TIOCGPTN)
 COMPATIBLE_IOCTL(TIOCSPTLCK)
 COMPATIBLE_IOCTL(TIOCSERGETLSR)
+COMPATIBLE_IOCTL(TIOCSIG)
 #ifdef TCGETS2
 COMPATIBLE_IOCTL(TCGETS2)
 COMPATIBLE_IOCTL(TCSETS2)
diff --git a/include/asm-generic/ioctls.h b/include/asm-generic/ioctls.h
index 1375fa1a7a4db0232bbdc1fa2cca5951162425df..8554cb6a81b9b6f3e063d204d6da830f6ed0038a 100644
--- a/include/asm-generic/ioctls.h
+++ b/include/asm-generic/ioctls.h
@@ -69,6 +69,7 @@
 #define TCSETX		0x5433
 #define TCSETXF		0x5434
 #define TCSETXW		0x5435
+#define TIOCSIG		_IOW('T', 0x36, int)  /* pty: generate signal */
 
 #define FIONCLEX	0x5450
 #define FIOCLEX		0x5451
@@ -102,6 +103,7 @@
 #define TIOCPKT_START		 8
 #define TIOCPKT_NOSTOP		16
 #define TIOCPKT_DOSTOP		32
+#define TIOCPKT_IOCTL		64
 
 #define TIOCSER_TEMT	0x01	/* Transmitter physically empty */
 
diff --git a/include/asm-generic/termbits.h b/include/asm-generic/termbits.h
index 1c9773d48cb021389ca3d2fbf8cc6dbb5f9d90ba..232b4781aef311f6eaf1885f0de5768a8517584e 100644
--- a/include/asm-generic/termbits.h
+++ b/include/asm-generic/termbits.h
@@ -178,6 +178,7 @@ struct ktermios {
 #define FLUSHO	0010000
 #define PENDIN	0040000
 #define IEXTEN	0100000
+#define EXTPROC	0200000
 
 /* tcflow() and TCXONC use these */
 #define	TCOOFF		0
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 7802a243ee1372dfff07f1dd6c2b294abeddfb9c..2df60e4ff40e038dfad3f2dd8637542eba784aff 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -179,6 +179,7 @@ struct tty_bufhead {
 #define L_FLUSHO(tty)	_L_FLAG((tty), FLUSHO)
 #define L_PENDIN(tty)	_L_FLAG((tty), PENDIN)
 #define L_IEXTEN(tty)	_L_FLAG((tty), IEXTEN)
+#define L_EXTPROC(tty)	_L_FLAG((tty), EXTPROC)
 
 struct device;
 struct signal_struct;