diff -ur cygwin-1.3.10-1.orig/winsup/cygwin/fhandler.cc 
cygwin-1.3.10-1/winsup/cygwin/fhandler.cc
--- cygwin-1.3.10-1.orig/winsup/cygwin/fhandler.cc	Tue Feb 19 19:25:00 2002
+++ cygwin-1.3.10-1/winsup/cygwin/fhandler.cc	Wed May  8 17:08:54 2002
@@ -241,6 +241,11 @@
	  /* This is really EOF.  */
	  bytes_read = 0;
	  break;
+        case ERROR_ACCESS_DENIED:
+          /* Windows returns this when reading from a file opened O_WRONLY,
+             but POSIX expects EBADF. */
+          set_errno(EBADF);
+          return -1;
	case ERROR_MORE_DATA:
	  /* `bytes_read' is supposedly valid.  */
	  break;
@@ -614,6 +619,11 @@
		  __seterrno ();
		  if (get_errno () == EPIPE)
		    raise (SIGPIPE);
+                  /* Windows returns E_ACCESS_DENIED when writing to a file
+                     opened with O_RDONLY, but POSIX expects EBADF. */
+		  if (get_errno () == EACCES) {
+                    set_errno(EBADF);
+                  }
		  /* This might fail, but it's the best we can hope for */
		  SetFilePointer (get_handle (), current_position, 0, FILE_BEGIN);
		  return -1;