--- gforth/engine/io.c	2002/03/13 17:09:09	1.14
+++ gforth/engine/io.c	2006/04/09 07:39:07	1.20
@@ -1,6 +1,6 @@
 /* direct key io driver
 
-  Copyright (C) 1995,1996,1997,1998,1999 Free Software Foundation, Inc.
+  Copyright (C) 1995,1996,1997,1998,1999,2002,2003 Free Software Foundation, Inc.
 
   This file is part of Gforth.
 
@@ -26,6 +26,7 @@
 */
 
 #include "config.h"
+#include "forth.h"
 #include <sys/time.h>
 #include <sys/types.h>
 #include <unistd.h>
@@ -51,7 +52,6 @@ typedef unsigned int uint32_t;
 #include <sys/filio.h>
 #endif
 #include <setjmp.h>
-#include "forth.h"
 #include "io.h"
 
 #ifndef MSDOS
@@ -447,6 +447,8 @@ void deprep_terminal ()
 #define VTIME VEOL
 #endif
 
+#include <locale.h>
+
 void prep_terminal ()
 {
   int tty = fileno (stdin);
@@ -472,6 +474,8 @@ void prep_terminal ()
     return;      /* added by MdG */
   }      /* added by MdG */
    
+  setlocale(LC_ALL, "");
+
   /* Try to keep this function from being INTerrupted.  We can do it
      on POSIX and systems with BSD-like signal handling. */
 #if defined (HAVE_POSIX_SIGNALS)
@@ -615,8 +619,13 @@ void deprep_terminal ()
 
 /* If a character is available to be read, then read it
    and stuff it into IBUFFER.  Otherwise, just return. */
-
 long pending = -1L;
+/* !! This is a bug: if key_avail(file1) is followed by getkey(file2),
+   the getkey(file2) can return the character from file1. - anton */
+
+/* Moreover, key_avail and getkey bypass the buffering of the FILE *,
+   leading to unpleasant effects if KEY-FILE and KEY?-FILE are mixed
+   with READ-FILE and READ-LINE */
 
 long key_avail (FILE * stream)
 {
@@ -624,9 +633,12 @@ long key_avail (FILE * stream)
   int chars_avail = pending;
   int result;
 
-  if(!terminal_prepped)  prep_terminal();
+  if(!terminal_prepped && stream == stdin)
+    prep_terminal();
 
 #if defined(FIONREAD) && !defined(_WIN32)
+  /* !! What is the point of this part? it does not affect
+     chars_avail, and "result" is never used - anton */
   if(isatty (tty)) {
     result = ioctl (tty, FIONREAD, &chars_avail);
   }