Function filesEqual

programs/install/Install.cpp:129–137

}

static bool filesEqual(std::string path1, std::string path2)
{
    MMapReadBufferFromFile in1(path1, 0);
    MMapReadBufferFromFile in2(path2, 0);

    /// memcmp is faster than hashing and comparing hashes
    return in1.buffer().size() == in2.buffer().size()
        && 0 == memcmp(in1.buffer().begin(), in2.buffer().begin(), in1.buffer().size());
}

static void changeOwnership(const String & file_name, const String & user_name, const String & group_name = {}, bool recursive = true)
{