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Unix.utimes: use native Windows API to avoid unintended DST timestamp…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| /**************************************************************************/ | ||
| /* */ | ||
| /* OCaml */ | ||
| /* */ | ||
| /* Nicolas Ojeda Bar, LexiFi */ | ||
| /* */ | ||
| /* Copyright 2017 Institut National de Recherche en Informatique et */ | ||
| /* en Automatique. */ | ||
| /* */ | ||
| /* All rights reserved. This file is distributed under the terms of */ | ||
| /* the GNU Lesser General Public License version 2.1, with the */ | ||
| /* special exception on linking described in the file LICENSE. */ | ||
| /* */ | ||
| /**************************************************************************/ | ||
|
|
||
| #define CAML_INTERNALS | ||
|
|
||
| #include <caml/fail.h> | ||
| #include <caml/mlvalues.h> | ||
| #include <caml/memory.h> | ||
| #include <caml/signals.h> | ||
| #include <caml/osdeps.h> | ||
| #include "unixsupport.h" | ||
|
|
||
| #include <windows.h> | ||
|
|
||
| static void convert_time(double unixTime, FILETIME* ft) | ||
| { | ||
| ULARGE_INTEGER u; | ||
| /* There are 11644473600 seconds between 1 January 1601 (the NT Epoch) and 1 | ||
| * January 1970 (the Unix Epoch). FILETIME is measured in 100ns ticks. | ||
| */ | ||
| u.QuadPart = (ULONGLONG)(unixTime * 10000000.0) + INT64_LITERAL(116444736000000000U); | ||
| ft->dwLowDateTime = u.LowPart; | ||
| ft->dwHighDateTime = u.HighPart; | ||
| } | ||
|
|
||
| CAMLprim value unix_utimes(value path, value atime, value mtime) | ||
| { | ||
| CAMLparam3(path, atime, mtime); | ||
| WCHAR *wpath; | ||
| HANDLE hFile; | ||
| FILETIME lastAccessTime, lastModificationTime; | ||
| SYSTEMTIME systemTime; | ||
| double at, mt; | ||
| BOOL res; | ||
|
|
||
| caml_unix_check_path(path, "utimes"); | ||
| at = Double_val(atime); | ||
| mt = Double_val(mtime); | ||
| wpath = caml_stat_strdup_to_utf16(String_val(path)); | ||
| caml_enter_blocking_section(); | ||
| hFile = CreateFile(wpath, | ||
| FILE_WRITE_ATTRIBUTES, | ||
| FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL); | ||
| caml_leave_blocking_section(); | ||
| caml_stat_free(wpath); | ||
| if (hFile == INVALID_HANDLE_VALUE) { | ||
| win32_maperr(GetLastError()); | ||
| uerror("utimes", path); | ||
| } | ||
| if (at == 0.0 && mt == 0.0) { | ||
| GetSystemTime(&systemTime); | ||
| SystemTimeToFileTime(&systemTime, &lastAccessTime); | ||
| memcpy(&lastModificationTime, &lastAccessTime, sizeof(FILETIME)); | ||
| } else { | ||
| convert_time(at, &lastAccessTime); | ||
| convert_time(mt, &lastModificationTime); | ||
| } | ||
| caml_enter_blocking_section(); | ||
| res = SetFileTime(hFile, NULL, &lastAccessTime, &lastModificationTime); | ||
| caml_leave_blocking_section(); | ||
| if (res == 0) { | ||
| win32_maperr(GetLastError()); | ||
| CloseHandle(hFile); | ||
| uerror("utimes", path); | ||
| } | ||
| CloseHandle(hFile); | ||
| CAMLreturn(Val_unit); | ||
| } |