char const *boolean_str(int val);
char *newstr(char const * p);
-void pw_log(struct userconf * cnf, int mode, int which, char const * fmt,...);
+void pw_log(struct userconf * cnf, int mode, int which, char const * fmt,...) __printflike(4, 5);
char *pw_pwcrypt(char *password);
extern const char *Modes[];