re PR libfortran/25697 (libfortran - Segmentation fault/ Bad Address on unformatted read)

2006-01-17  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR libgfortran/25697
	* io/transfer.c (us_read): Detect end of file condition from previous
	operations and bail out (no need to pre-position).

From-SVN: r109870

libgfortran/ChangeLog

 2006-01-17  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
+	PR libgfortran/25697
+	* io/transfer.c (us_read): Detect end of file condition from previous
+	operations and bail out (no need to pre-position).
+
+2006-01-17  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
 	PR libgfortran/25631
 	* io/transfer.c (formatted_transfer_scalar): Adjust pending_spaces and
 	skips so that TL works correctly when no bytes_used yet.  

libgfortran/io/transfer.c

-/* Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
    Contributed by Andy Vaught
    Namelist transfer functions contributed by Paul Thomas
 
@@ -1219,11 +1219,17 @@ us_read (st_parameter_dt *dtp)
   int n;
   gfc_offset i;
 
+  if (dtp->u.p.current_unit->endfile == AT_ENDFILE)
+    return;
+
   n = sizeof (gfc_offset);
   p = salloc_r (dtp->u.p.current_unit->s, &n);
 
   if (n == 0)
-    return;  /* end of file */
+    {
+      dtp->u.p.current_unit->endfile = AT_ENDFILE;
+      return;  /* end of file */
+    }
 
   if (p == NULL || n != sizeof (gfc_offset))
     {