--- less-378/screen.c.orig	2002-09-30 21:57:15 +0400

+++ less-378/screen.c	2002-10-02 13:14:32 +0400

@@ -237,6 +237,18 @@ extern int hilite_search;

 extern char *tgetstr();

 extern char *tgoto();

+static int screen_fd(void)

+{

+	static int fd = -1;

+	if (fd == -1)

+	{

+		for (fd = STDIN_FILENO; fd <= STDERR_FILENO; ++fd)

+			if (isatty(fd))

+				break;

+	}

+

+	return (fd <= STDERR_FILENO) ? fd : -1;

+}

 /*

  * Change terminal to "raw mode", or restore to "normal" mode.

@@ -268,7 +280,7 @@ raw_mode(on)

 		/*

 		 * Get terminal modes.

 		 */

-		tcgetattr(tty, &s);

+		tcgetattr(screen_fd(), &s);

 		/*

 		 * Save modes and set certain variables dependent on modes.

@@ -426,7 +438,7 @@ raw_mode(on)

 #if HAVE_FSYNC

 	fsync(tty);

 #endif

-	tcsetattr(tty, TCSADRAIN, &s);

+	tcsetattr(screen_fd(), TCSADRAIN, &s);

 #if MUST_SET_LINE_DISCIPLINE

 	if (!on)

 	{

@@ -436,7 +448,7 @@ raw_mode(on)

 		 * is therefore not restored, yet.  Restore the old

 		 * line discipline by hand.

 		 */

-		ioctl(tty, TIOCSETD, &save_term.c_line);

+		ioctl(screen_fd(), TIOCSETD, &save_term.c_line);

 	}

 #endif

     }

@@ -452,7 +464,7 @@ raw_mode(on)

 		/*

 		 * Get terminal modes.

 		 */

-		ioctl(tty, TCGETA, &s);

+		ioctl(screen_fd(), TCGETA, &s);

 		/*

 		 * Save modes and set certain variables dependent on modes.

@@ -488,7 +500,7 @@ raw_mode(on)

 		 */

 		s = save_term;

 	}

-	ioctl(tty, TCSETAW, &s);

+	ioctl(screen_fd(), TCSETAW, &s);

     }

 #else

 #ifdef TIOCGETP

@@ -502,7 +514,7 @@ raw_mode(on)

 		/*

 		 * Get terminal modes.

 		 */

-		ioctl(tty, TIOCGETP, &s);

+		ioctl(screen_fd(), TIOCGETP, &s);

 		/*

 		 * Save modes and set certain variables dependent on modes.

@@ -531,7 +543,7 @@ raw_mode(on)

 		 */

 		s = save_term;

 	}

-	ioctl(tty, TIOCSETN, &s);

+	ioctl(screen_fd(), TIOCSETN, &s);

     }

 #else

 #ifdef _OSK

@@ -741,7 +753,7 @@ scrsize()

 #ifdef TIOCGWINSZ

 	{

 		struct winsize w;

-		if (ioctl(2, TIOCGWINSZ, &w) == 0)

+		if (ioctl(screen_fd(), TIOCGWINSZ, &w) == 0)

 		{

 			if (w.ws_row > 0)

 				sys_height = w.ws_row;

@@ -753,7 +765,7 @@ scrsize()

 #ifdef WIOCGETD

 	{

 		struct uwdata w;

-		if (ioctl(2, WIOCGETD, &w) == 0)

+		if (ioctl(screen_fd(), WIOCGETD, &w) == 0)

 		{

 			if (w.uw_height > 0)

 				sys_height = w.uw_height / w.uw_vs;