Added minimal version of watchdog

Sublime/fl0w/watchdog/utils/win32stat.py

@@ -0,0 +1,123 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright 2014 Thomas Amland <thomas.amland@gmail.com>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+:module: watchdog.utils.win32stat
+:synopsis: Implementation of stat with st_ino and st_dev support.
+
+Functions
+---------
+
+.. autofunction:: stat
+
+"""
+
+import ctypes
+import ctypes.wintypes
+import stat as stdstat
+from collections import namedtuple
+
+
+INVALID_HANDLE_VALUE = ctypes.c_void_p(-1).value
+OPEN_EXISTING = 3
+FILE_READ_ATTRIBUTES = 0x80
+FILE_ATTRIBUTE_NORMAL = 0x80
+FILE_ATTRIBUTE_READONLY = 0x1
+FILE_ATTRIBUTE_DIRECTORY = 0x10
+FILE_FLAG_BACKUP_SEMANTICS = 0x02000000
+FILE_FLAG_OPEN_REPARSE_POINT = 0x00200000
+
+
+class FILETIME(ctypes.Structure):
+    _fields_ = [("dwLowDateTime", ctypes.wintypes.DWORD),
+                ("dwHighDateTime", ctypes.wintypes.DWORD)]
+
+
+class BY_HANDLE_FILE_INFORMATION(ctypes.Structure):
+    _fields_ = [('dwFileAttributes', ctypes.wintypes.DWORD),
+                ('ftCreationTime', FILETIME),
+                ('ftLastAccessTime', FILETIME),
+                ('ftLastWriteTime', FILETIME),
+                ('dwVolumeSerialNumber', ctypes.wintypes.DWORD),
+                ('nFileSizeHigh', ctypes.wintypes.DWORD),
+                ('nFileSizeLow', ctypes.wintypes.DWORD),
+                ('nNumberOfLinks', ctypes.wintypes.DWORD),
+                ('nFileIndexHigh', ctypes.wintypes.DWORD),
+                ('nFileIndexLow', ctypes.wintypes.DWORD)]
+
+
+CreateFile = ctypes.windll.kernel32.CreateFileW
+CreateFile.restype = ctypes.wintypes.HANDLE
+CreateFile.argtypes = (
+    ctypes.c_wchar_p,
+    ctypes.wintypes.DWORD,
+    ctypes.wintypes.DWORD,
+    ctypes.c_void_p,
+    ctypes.wintypes.DWORD,
+    ctypes.wintypes.DWORD,
+    ctypes.wintypes.HANDLE,
+)
+
+GetFileInformationByHandle = ctypes.windll.kernel32.GetFileInformationByHandle
+GetFileInformationByHandle.restype = ctypes.wintypes.BOOL
+GetFileInformationByHandle.argtypes = (
+    ctypes.wintypes.HANDLE,
+    ctypes.wintypes.POINTER(BY_HANDLE_FILE_INFORMATION),
+)
+
+CloseHandle = ctypes.windll.kernel32.CloseHandle
+CloseHandle.restype = ctypes.wintypes.BOOL
+CloseHandle.argtypes = (ctypes.wintypes.HANDLE,)
+
+
+StatResult = namedtuple('StatResult', 'st_dev st_ino st_mode st_mtime')
+
+def _to_mode(attr):
+    m = 0
+    if (attr & FILE_ATTRIBUTE_DIRECTORY):
+        m |= stdstat.S_IFDIR | 0o111
+    else:
+        m |= stdstat.S_IFREG
+    if (attr & FILE_ATTRIBUTE_READONLY):
+        m |= 0o444
+    else:
+        m |= 0o666
+    return m
+
+def _to_unix_time(ft):
+    t = (ft.dwHighDateTime) << 32 | ft.dwLowDateTime
+    return (t / 10000000) - 11644473600
+
+def stat(path):
+    hfile = CreateFile(path,
+            FILE_READ_ATTRIBUTES,
+            0,
+            None,
+            OPEN_EXISTING,
+            FILE_ATTRIBUTE_NORMAL | FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT,
+            None)
+    if hfile == INVALID_HANDLE_VALUE:
+        raise ctypes.WinError()
+    info = BY_HANDLE_FILE_INFORMATION()
+    r = GetFileInformationByHandle(hfile, info)
+    CloseHandle(hfile)
+    if not r:
+        raise ctypes.WinError()
+    return StatResult(st_dev=info.dwVolumeSerialNumber,
+                      st_ino=(info.nFileIndexHigh << 32) + info.nFileIndexLow,
+                      st_mode=_to_mode(info.dwFileAttributes),
+                      st_mtime=_to_unix_time(info.ftLastWriteTime)
+                      )