Function libcryptsetup_sys::crypt_keyfile_read

pub unsafe extern "C" fn crypt_keyfile_read(
    cd: *mut crypt_device, 
    keyfile: *const c_char, 
    key: *mut *mut c_char, 
    key_size_read: *mut size_t, 
    keyfile_offset: size_t, 
    key_size: size_t, 
    flags: u32
) -> c_int