-int db_help_cmd(char *, char*, char*, char*);
-int db_ldr_cmd(char*, char*, char*, char*);
-int db_str_cmd(char*, char*, char*, char*);
-int db_info_cmd(char*, char*, char*, char*);
-int db_usb_cmd(char*, char*, char*, char*);
-int db_intr_cmd(char*, char*, char*, char*);
+static int db_help_cmd(char *, char *, char *, char *);
+static int db_ldr_cmd(char *, char *, char *, char *);
+static int db_str_cmd(char *, char *, char *, char *);
+static int db_info_cmd(char *, char *, char *, char *);
+static int db_usb_cmd(char *, char *, char *, char *);
+static int db_intr_cmd(char *, char *, char *, char *);