#include <stdio.h> /* for FILE */
#include <stdlib.h> /* for encrypt */
#include <unistd.h> /* for setkey */
+#include <stdarg.h>
#include <limits.h> /* for NGROUPS_MAX */
#include <sys/param.h> /* for MAXPATHLEN and BSD4_4, if defined */
#include <sys/types.h> /* for u_int32_t, if defined */