extern int efi_alloc_and_init(int, uint32_t, struct dk_gpt **);
extern int efi_alloc_and_read(int, struct dk_gpt **);
extern int efi_write(int, struct dk_gpt *);
extern int efi_alloc_and_init(int, uint32_t, struct dk_gpt **);
extern int efi_alloc_and_read(int, struct dk_gpt **);
extern int efi_write(int, struct dk_gpt *);