+extern int guestfs_exists (guestfs_h *handle, const char *path);
+extern int guestfs_is_file (guestfs_h *handle, const char *path);
+extern int guestfs_is_dir (guestfs_h *handle, const char *path);
+extern int guestfs_pvcreate (guestfs_h *handle, const char *device);
+extern int guestfs_vgcreate (guestfs_h *handle, const char *volgroup, char * const* const physvols);
+extern int guestfs_lvcreate (guestfs_h *handle, const char *logvol, const char *volgroup, int mbytes);
+extern int guestfs_mkfs (guestfs_h *handle, const char *fstype, const char *device);
+extern int guestfs_sfdisk (guestfs_h *handle, const char *device, int cyls, int heads, int sectors, char * const* const lines);
+extern int guestfs_write_file (guestfs_h *handle, const char *path, const char *content, int size);
+extern int guestfs_umount (guestfs_h *handle, const char *pathordevice);
+extern char **guestfs_mounts (guestfs_h *handle);
+extern int guestfs_umount_all (guestfs_h *handle);
+extern int guestfs_lvm_remove_all (guestfs_h *handle);