Index: src/diff.c
===================================================================
RCS file: /sources/diffutils/diffutils/src/diff.c,v
retrieving revision 1.47
diff -u -r1.47 diff.c
--- src/diff.c	5 Dec 2007 07:24:14 -0000	1.47
+++ src/diff.c	11 Apr 2009 11:56:31 -0000
@@ -1081,7 +1081,13 @@
 	    {
 	      cmp.file[f].desc = STDIN_FILENO;
 	      if (binary && ! isatty (STDIN_FILENO))
-		freopen (NULL, "rb", stdin);
+	      {
+	  	    /* Try to change stdin to binary mode */
+	  	    if (!freopen (NULL, "rb", stdin))
+				cmp.file[f].desc = ERRNO_ENCODE (errno);
+	      }
+	      if (0 > ERRNO_DECODE (cmp.file[f].desc))
+	      {
 	      if (fstat (STDIN_FILENO, &cmp.file[f].stat) != 0)
 		cmp.file[f].desc = ERRNO_ENCODE (errno);
 	      else
@@ -1101,6 +1107,7 @@
 		  set_mtime_to_now (&cmp.file[f].stat);
 		}
 	    }
+	    }
 	  else if (stat (cmp.file[f].name, &cmp.file[f].stat) != 0)
 	    cmp.file[f].desc = ERRNO_ENCODE (errno);
 	}