[ovs-dev] [PATCH V5 05/17] python tests: Added fcntl module for Windows

[Paul Boca]

This is needed for lockf function used to lock the PID file on Windows.
ioctl and fcntl functions are not implemented at this time because they are
not used by any script.

Signed-off-by: Paul-Daniel Boca <pboca at cloudbasesolutions.com>
---
V2: No changes
V3: No changes
V4: No changes
V5: No changes
---
 python/automake.mk      |  1 +
 python/ovs/fcntl_win.py | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 python/ovs/fcntl_win.py

diff --git a/python/automake.mk b/python/automake.mk
index ecad39d..1c8fa38 100644
--- a/python/automake.mk
+++ b/python/automake.mk
@@ -11,6 +11,7 @@ ovstest_pyfiles = \
 ovs_pyfiles = \
 	python/ovs/__init__.py \
 	python/ovs/daemon.py \
+	python/ovs/fcntl_win.py \
 	python/ovs/db/__init__.py \
 	python/ovs/db/data.py \
 	python/ovs/db/error.py \
diff --git a/python/ovs/fcntl_win.py b/python/ovs/fcntl_win.py
new file mode 100644
index 0000000..cf48aaa
--- /dev/null
+++ b/python/ovs/fcntl_win.py
@@ -0,0 +1,36 @@
+import errno
+import win32con
+import win32file
+import pywintypes
+import msvcrt
+
+LOCK_EX = win32con.LOCKFILE_EXCLUSIVE_LOCK
+LOCK_SH = 0 # the default
+LOCK_NB = win32con.LOCKFILE_FAIL_IMMEDIATELY
+LOCK_UN = 0x80000000  # unlock - non-standard
+
+def fcntl(fd, op, arg=0):
+    # not implemented yet on Windows
+    return 0
+
+def ioctl(fd, op, arg=0, mutable_flag=True):
+    # not implemented yet on Windows
+    if mutable_flag:
+        return 0
+    else:
+        return ""
+
+def lockf(fd, flags, length=0xFFFF0000, start=0, whence=0):
+    file_name = fd.name
+    overlapped = pywintypes.OVERLAPPED()
+    hfile = msvcrt.get_osfhandle(fd.fileno())
+    if LOCK_UN & flags:
+        ret = win32file.UnlockFileEx(hfile, 0, start, length, overlapped)
+    else:
+        try:
+            ret = win32file.LockFileEx(hfile, flags, start, length, overlapped)
+        except:
+            raise IOError(errno.EAGAIN, "", "")
+
+def flock(fd, flags):
+    lockf(fd, flags, 0xFFFF0000, 0, 0)
-- 
2.7.2.windows.1