+extern char *guestfs_sh (guestfs_h *handle, const char *command);
+extern char **guestfs_sh_lines (guestfs_h *handle, const char *command);
+extern char **guestfs_glob_expand (guestfs_h *handle, const char *pattern);
+extern int guestfs_scrub_device (guestfs_h *handle, const char *device);
+extern int guestfs_scrub_file (guestfs_h *handle, const char *file);
+extern int guestfs_scrub_freespace (guestfs_h *handle, const char *dir);
+extern char *guestfs_mkdtemp (guestfs_h *handle, const char *template);
+extern int guestfs_wc_l (guestfs_h *handle, const char *path);
+extern int guestfs_wc_w (guestfs_h *handle, const char *path);
+extern int guestfs_wc_c (guestfs_h *handle, const char *path);
+extern char **guestfs_head (guestfs_h *handle, const char *path);
+extern char **guestfs_head_n (guestfs_h *handle, int nrlines, const char *path);
+extern char **guestfs_tail (guestfs_h *handle, const char *path);
+extern char **guestfs_tail_n (guestfs_h *handle, int nrlines, const char *path);
+extern char *guestfs_df (guestfs_h *handle);
+extern char *guestfs_df_h (guestfs_h *handle);
+extern int64_t guestfs_du (guestfs_h *handle, const char *path);