--- rxvt-unicode/src/ptytty.C	2004/09/30 09:49:13	1.17
+++ rxvt-unicode/src/ptytty.C	2005/01/11 04:44:57	1.22
@@ -48,11 +48,14 @@
 #ifdef HAVE_ISASTREAM
 # include <stropts.h>
 #endif
+#ifdef HAVE_PTY_H
+# include <pty.h>
+#endif
 
 // better do this via configure, but....
 #if defined(__FreeBSD__)
 # include <libutil.h>
-#elif defined(__DARWIN__)
+#elif defined(__DARWIN__) || (defined (__MACH__) && defined (__APPLE__))
 # include <util.h>
 #endif
 
@@ -438,5 +441,32 @@
   return true;
 }
 
+void
+rxvt_ptytty::set_utf8_mode (bool on)
+{
+#ifdef IUTF8
+  if (pty != -1)
+    {
+      struct termios tio;
+
+      if (tcgetattr (pty, &tio) != -1)
+        {
+          tcflag_t new_cflag = tio.c_iflag;
+
+          if (on)
+            new_cflag |= IUTF8;
+          else
+            new_cflag &= ~IUTF8;
+
+          if (new_cflag != tio.c_iflag)
+            {
+              tio.c_iflag = new_cflag;
+              tcsetattr (pty, TCSANOW, &tio);
+            }
+        }
+    }
+#endif
+}
+
 /*----------------------- end-of-file (C source) -----------------------*/