int conf_read_simple(const char *name, int);
int conf_write_defconfig(const char *name);
int conf_write(const char *name);
-int conf_write_autoconf(void);
+int conf_write_autoconf(int overwrite);
bool conf_get_changed(void);
void conf_set_changed_callback(void (*fn)(void));
void conf_set_message_callback(void (*fn)(const char *s));
void variable_add(const char *name, const char *value,
enum variable_flavor flavor);
void variable_all_del(void);
-char *expand_string(const char *in);
char *expand_dollar(const char **str);
char *expand_one_token(const char **str);