Improve all of the Windows-specific error reporting.

[tahoe-lafs/tahoe-lafs.git] / src / allmydata / util / fileutil.py

diff --git a/src/allmydata/util/fileutil.py b/src/allmydata/util/fileutil.py
index 29e6d1b194c7d3ca9075e248220535f5f0868c70..1133c261c7f54b14652c3a4d7516c872cf30a809 100644 (file)
--- a/src/allmydata/util/fileutil.py
+++ b/src/allmydata/util/fileutil.py
@@ -521,8 +521,10 @@ def get_available_space(whichdir, reserved_space):
 
 if sys.platform == "win32":
     # <http://msdn.microsoft.com/en-us/library/aa363858%28v=vs.85%29.aspx>
-    CreateFileW = WINFUNCTYPE(HANDLE, LPCWSTR, DWORD, DWORD, LPVOID, DWORD, DWORD, HANDLE) \
-                      (("CreateFileW", windll.kernel32))
+    CreateFileW = WINFUNCTYPE(
+        HANDLE,  LPCWSTR, DWORD, DWORD, LPVOID, DWORD, DWORD, HANDLE,
+        use_last_error=True
+    )(("CreateFileW", windll.kernel32))
 
     GENERIC_WRITE        = 0x40000000
     FILE_SHARE_READ      = 0x00000001
@@ -531,10 +533,16 @@ if sys.platform == "win32":
     INVALID_HANDLE_VALUE = 0xFFFFFFFF
 
     # <http://msdn.microsoft.com/en-us/library/aa364439%28v=vs.85%29.aspx>
-    FlushFileBuffers = WINFUNCTYPE(BOOL, HANDLE)(("FlushFileBuffers", windll.kernel32))
+    FlushFileBuffers = WINFUNCTYPE(
+        BOOL,  HANDLE,
+        use_last_error=True
+    )(("FlushFileBuffers", windll.kernel32))
 
     # <http://msdn.microsoft.com/en-us/library/ms724211%28v=vs.85%29.aspx>
-    CloseHandle = WINFUNCTYPE(BOOL, HANDLE)(("CloseHandle", windll.kernel32))
+    CloseHandle = WINFUNCTYPE(
+        BOOL,  HANDLE,
+        use_last_error=True
+    )(("CloseHandle", windll.kernel32))
 
     # <http://social.msdn.microsoft.com/forums/en-US/netfxbcl/thread/4465cafb-f4ed-434f-89d8-c85ced6ffaa8/>
     def flush_volume(path):
@@ -549,10 +557,10 @@ if sys.platform == "win32":
                               None
                              )
         if hVolume == INVALID_HANDLE_VALUE:
-            raise WinError()
+            raise WinError(get_last_error())
 
         if FlushFileBuffers(hVolume) == 0:
-            raise WinError()
+            raise WinError(get_last_error())
 
         CloseHandle(hVolume)
 else:
@@ -575,10 +583,9 @@ def reraise(wrapper):
 if sys.platform == "win32":
     # <https://msdn.microsoft.com/en-us/library/windows/desktop/aa365512%28v=vs.85%29.aspx>
     ReplaceFileW = WINFUNCTYPE(
-        BOOL,
-          LPCWSTR, LPCWSTR, LPCWSTR, DWORD, LPVOID, LPVOID,
+        BOOL,  LPCWSTR, LPCWSTR, LPCWSTR, DWORD, LPVOID, LPVOID,
         use_last_error=True
-      )(("ReplaceFileW", windll.kernel32))
+    )(("ReplaceFileW", windll.kernel32))
 
     REPLACEFILE_IGNORE_MERGE_ERRORS = 0x00000002