Return EINVAL for meaningless combination of MU_STREAM_READ + WRITE.

+2001-06-03  Sam Roberts
+
+	* mailbox/file_stream.c,mailbox/mapfile_stream.c: Return EINVAL
+	  for meaningless combination of MU_STREAM_READ + WRITE.
+
 2001-06-03  Alain Magloire
 
 	* doc/*; Bunch of typos corrected.

@@ -244,7 +244,9 @@ _file_open (stream_t stream, const char *filename, int port, int flags)
     }
 
   /* Map the flags to the system equivalent.  */
-  if (flags & MU_STREAM_WRITE)
+  if (flags & MU_STREAM_WRITE && flags & MU_STREAM_READ)
+    return EINVAL;
+  else if (flags & MU_STREAM_WRITE)
     flg = O_WRONLY;
   else if (flags & MU_STREAM_RDWR)
     flg = O_RDWR;

@@ -279,7 +279,9 @@ _mapfile_open (stream_t stream, const char *filename, int port, int flags)
       mfs->fd = -1;
     }
   /* Map the flags to the system equivalent */
-  if (flags & MU_STREAM_WRITE)
+  if (flags & MU_STREAM_WRITE && flags & MU_STREAM_READ)
+    return EINVAL;
+  else if (flags & MU_STREAM_WRITE)
     {
       mflag = PROT_WRITE;
       flg = O_WRONLY;