Getting the File Creation Time using std::filesystem

1#include <chrono>
2#include <filesystem>
3#include <iostream>
4namespace fs = std::filesystem;
5
6int main() {
7  using namespace std::chrono;
8  fs::path file_path{R"(c:\test\hello.txt)"};
9  try {
10    auto ftime = fs::last_write_time(file_path);  
11    auto sctp =
12      time_point_cast<system_clock::duration>(
13        ftime - fs::file_time_type::clock::now()
14        + system_clock::now()
15      );
16
17    std::time_t cftime =
18      system_clock::to_time_t(sctp);
19    std::cout << "Last write time: "
20      << std::asctime(std::localtime(&cftime));
21  } catch (fs::filesystem_error &e) {
22    std::cerr << e.what() << '\\n';
23  }
24}

1#include <windows.h>
2
3#include <iostream>
4
5void print_file_creation_time(
6  const std::wstring &file_path) {
7  HANDLE file_handle =
8    CreateFileW(
9      file_path.c_str(),
10      GENERIC_READ,
11      FILE_SHARE_READ,
12      nullptr,
13      OPEN_EXISTING,
14      FILE_ATTRIBUTE_NORMAL,
15      nullptr
16    );
17
18  if (file_handle == INVALID_HANDLE_VALUE) {
19    std::cerr << "Failed to open file\n";
20    return;
21  }
22
23  FILETIME creation_time;
24  if (GetFileTime(
25    file_handle,
26    &creation_time,
27    nullptr,
28    nullptr
29  )) {
30    SYSTEMTIME st;
31    FileTimeToSystemTime(&creation_time, &st);
32    std::cout << "Creation time: "
33      << st.wYear << '/'
34      << st.wMonth << '/'
35      << st.wDay << ' '
36      << st.wHour << ':'
37      << st.wMinute << ':'
38      << st.wSecond << '\n';
39  } else {
40    std::cerr << "Failed to get file time\n";
41  }
42
43  CloseHandle(file_handle);
44}
45
46int main() {
47  print_file_creation_time(L"c:\\test\\hello.txt");  
48}