Using a C pointer (stdio) with a unique_ptr (C++11) (code from: https://codereview.stackexchange.com/questions/4679/shared-ptr-and-file-for-wrapping-cstdio-update-also-dlfcn-h)

cfileptr.cpp

#include <memory>
#include <cstdio>

/////////////////////////////////////////////////////////////////////////////

typedef std::unique_ptr<std::FILE, int (*)(std::FILE *)> unique_file_ptr;
typedef std::shared_ptr<std::FILE> shared_file_ptr;

static shared_file_ptr make_shared_file(const char * filename, const char * flags)
{
  std::FILE * const fp = std::fopen(filename, flags);
  return fp ? shared_file_ptr(fp, std::fclose) : shared_file_ptr();
}

static unique_file_ptr make_file(const char * filename, const char * flags)
{
  return unique_file_ptr(std::fopen(filename, flags), std::fclose);
}

/////////////////////////////////////////////////////////////////////////////

int main(int argc, char const *argv[])
{
	unique_file_ptr f = make_file("test.txt", "a");
	std::fputs("And I heard, as it were, the noise of thunder:\n", f.get());
	std::fputs("One of the four beasts saying\n", f.get());
	std::fputs("Come and see\n", f.get());
	std::fputs("And I saw.\n", f.get());
	std::fputs("And behold, a white horse.\n", f.get());
	return 0;
}