void *mh_xmalloc(size_t);
void *mh_xrealloc(void *, size_t);
char *pwd(void);
char *add(char *, char *);
void *mh_xmalloc(size_t);
void *mh_xrealloc(void *, size_t);
char *pwd(void);
char *add(char *, char *);
-int folder_exists(char *);
-void create_folder(char *, int, void (*)());
+void create_folder(char *, int, void (*)(int));