From a93bac9880a1d8eda49821998d74505d0480fc6a Mon Sep 17 00:00:00 2001
From: Giampaolo Rodola <g.rodola@gmail.com>
Date: Sun, 6 Mar 2016 13:51:05 -0800
Subject: [PATCH] #795 / win services: also return service PID

---
 psutil/_pswindows.py           | 16 ++++++++++++----
 psutil/arch/windows/services.c | 23 ++++++++++++++++-------
 psutil/tests/test_windows.py   |  2 ++
 3 files changed, 30 insertions(+), 11 deletions(-)

diff --git a/psutil/_pswindows.py b/psutil/_pswindows.py
index e437e33ce..b49d36974 100644
--- a/psutil/_pswindows.py
+++ b/psutil/_pswindows.py
@@ -324,18 +324,26 @@ def users():
 class WindowsService(object):
     """Represents an installed Windows service."""
 
-    def __init__(self, name, display_name, status):
+    def __init__(self, name, display_name, status, pid):
         self._name = name
         self._display_name = display_name
         self._status = status
+        if pid == 0:
+            pid = None
+        self._pid = pid
 
     def __str__(self):
-        details = "(name=%s, status=%s)" % (self.name, self.status)
+        details = "(name=%s, status=%s, pid=%s)" % (
+            self.name, self.status, self.pid)
         return "%s%s" % (self.__class__.__name__, details)
 
     def __repr__(self):
         return "<%s at %s>" % (self.__str__(), id(self))
 
+    @property
+    def pid(self):
+        return self._pid
+
     @property
     def name(self):
         return self._name
@@ -351,8 +359,8 @@ def status(self):
 
 def win_service_iter():
     """Return a list of WindowsService instances."""
-    for name, display_name, status in cext.winservice_enumerate():
-        yield WindowsService(name, display_name, status)
+    for name, display_name, status, pid in cext.winservice_enumerate():
+        yield WindowsService(name, display_name, status, pid)
 
 
 # --- decorators
diff --git a/psutil/arch/windows/services.c b/psutil/arch/windows/services.c
index 61e0b217c..e8bdb3b5d 100644
--- a/psutil/arch/windows/services.c
+++ b/psutil/arch/windows/services.c
@@ -16,7 +16,7 @@
  */
 PyObject *
 psutil_winservice_enumerate(PyObject *self, PyObject *args) {
-    ENUM_SERVICE_STATUS *lpService = NULL;
+    ENUM_SERVICE_STATUS_PROCESS *lpService = NULL;
     SC_HANDLE sc = NULL;
     BOOL ok;
     DWORD bytesNeeded = 0;
@@ -37,23 +37,32 @@ psutil_winservice_enumerate(PyObject *self, PyObject *args) {
     }
 
     for (;;) {
-        ok = EnumServicesStatus(
-            sc, SERVICE_WIN32, SERVICE_STATE_ALL, lpService, dwBytes,
-            &bytesNeeded, &srvCount, &resumeHandle);
+        ok = EnumServicesStatusEx(
+            sc,
+            SC_ENUM_PROCESS_INFO,
+            SERVICE_WIN32,
+            SERVICE_STATE_ALL,
+            (LPBYTE)lpService,
+            dwBytes,
+            &bytesNeeded,
+            &srvCount,
+            &resumeHandle,
+            NULL);
         if (ok || (GetLastError() != ERROR_MORE_DATA))
             break;
         if (lpService)
             free(lpService);
         dwBytes = bytesNeeded;
-        lpService = (ENUM_SERVICE_STATUS*)malloc(dwBytes);
+        lpService = (ENUM_SERVICE_STATUS_PROCESS*)malloc(dwBytes);
     }
 
     for (i = 0; i < srvCount; i++) {
         py_tuple = Py_BuildValue(
-            "(ssi)",
+            "(ssik)",
             lpService[i].lpServiceName,  // name
             lpService[i].lpDisplayName,  // display name
-            lpService[i].ServiceStatus.dwCurrentState  // status
+            lpService[i].ServiceStatusProcess.dwCurrentState,  // status
+            lpService[i].ServiceStatusProcess.dwProcessId  // pid
         );
         if (py_tuple == NULL)
             goto error;
diff --git a/psutil/tests/test_windows.py b/psutil/tests/test_windows.py
index 6972e237c..4a9d0997d 100644
--- a/psutil/tests/test_windows.py
+++ b/psutil/tests/test_windows.py
@@ -593,6 +593,8 @@ def test_win_service_iter(self):
             self.assertTrue(serv.name)
             self.assertTrue(serv.display_name)
             self.assertIn(serv.status, statuses)
+            if serv.pid is not None:
+                psutil.Process(serv.pid)
 
 
 if __name__ == '__main__':