# define NO_SYS_PARAM_H
# define NO_SYS_UN_H
+# define DEFAULT_HOME "SYS$LOGIN:"
+
# else
/* !defined VMS */
# ifdef OPENSSL_UNISTD
# define open _open
# define fdopen _fdopen
# define close _close
-# define strdup _strdup
+# ifndef strdup
+# define strdup _strdup
+# endif
# define unlink _unlink
# endif
# else