extern char **do_head_n (int nrlines, char *path);
extern char **do_tail (char *path);
extern char **do_tail_n (int nrlines, char *path);
+extern char *do_df (void);
+extern char *do_df_h (void);
+extern int64_t do_du (char *path);
+extern char **do_initrd_list (char *path);
+extern int do_mount_loop (char *file, char *mountpoint);