Move wmi_util out of base and into chrome/installer/util since that's the only place where it's used.

TEST=it compiles
BUG=none
Review URL: http://codereview.chromium.org/3696001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@62123 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 152 insertions, 0 deletions

diff --git a/chrome/installer/util/wmi.cc b/chrome/installer/util/wmi.cc
new file mode 100644
index 0000000..957ec99
--- /dev/null
+++ b/chrome/installer/util/wmi.cc
@@ -0,0 +1,152 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/installer/util/wmi.h"
+
+#include <windows.h>
+
+#include "base/basictypes.h"
+#include "base/scoped_bstr_win.h"
+#include "base/scoped_comptr_win.h"
+
+#pragma comment(lib, "wbemuuid.lib")
+
+namespace installer {
+
+namespace {
+
+// Simple class to manage the lifetime of a variant.
+// TODO(tommi): Replace this for a more useful class.
+class VariantHelper : public VARIANT {
+ public:
+  VariantHelper() {
+    vt = VT_EMPTY;
+  }
+  explicit VariantHelper(VARTYPE type) {
+    vt = type;
+  }
+  ~VariantHelper() {
+    ::VariantClear(this);
+  }
+ private:
+  DISALLOW_COPY_AND_ASSIGN(VariantHelper);
+};
+
+}  // namespace
+
+bool WMI::CreateLocalConnection(bool set_blanket,
+                                IWbemServices** wmi_services) {
+  ScopedComPtr<IWbemLocator> wmi_locator;
+  HRESULT hr = wmi_locator.CreateInstance(CLSID_WbemLocator, NULL,
+                                          CLSCTX_INPROC_SERVER);
+  if (FAILED(hr))
+    return false;
+
+  ScopedComPtr<IWbemServices> wmi_services_r;
+  hr = wmi_locator->ConnectServer(StackBstr(L"ROOT\\CIMV2"), NULL, NULL, 0,
+                                  NULL, 0, 0, wmi_services_r.Receive());
+  if (FAILED(hr))
+    return false;
+
+  if (set_blanket) {
+    hr = ::CoSetProxyBlanket(wmi_services_r,
+                             RPC_C_AUTHN_WINNT,
+                             RPC_C_AUTHZ_NONE,
+                             NULL,
+                             RPC_C_AUTHN_LEVEL_CALL,
+                             RPC_C_IMP_LEVEL_IMPERSONATE,
+                             NULL,
+                             EOAC_NONE);
+    if (FAILED(hr))
+      return false;
+  }
+
+  *wmi_services = wmi_services_r.Detach();
+  return true;
+}
+
+bool WMI::CreateClassMethodObject(IWbemServices* wmi_services,
+                                  const std::wstring& class_name,
+                                  const std::wstring& method_name,
+                                  IWbemClassObject** class_instance) {
+  // We attempt to instantiate a COM object that represents a WMI object plus
+  // a method rolled into one entity.
+  ScopedBstr b_class_name(class_name.c_str());
+  ScopedBstr b_method_name(method_name.c_str());
+  ScopedComPtr<IWbemClassObject> class_object;
+  HRESULT hr;
+  hr = wmi_services->GetObject(b_class_name, 0, NULL,
+                               class_object.Receive(), NULL);
+  if (FAILED(hr))
+    return false;
+
+  ScopedComPtr<IWbemClassObject> params_def;
+  hr = class_object->GetMethod(b_method_name, 0, params_def.Receive(), NULL);
+  if (FAILED(hr))
+    return false;
+
+  if (NULL == params_def) {
+    // You hit this special case if the WMI class is not a CIM class. MSDN
+    // sometimes tells you this. Welcome to WMI hell.
+    return false;
+  }
+
+  hr = params_def->SpawnInstance(0, class_instance);
+  return(SUCCEEDED(hr));
+}
+
+bool SetParameter(IWbemClassObject* class_method,
+                  const std::wstring& parameter_name, VARIANT* parameter) {
+  HRESULT hr = class_method->Put(parameter_name.c_str(), 0, parameter, 0);
+  return SUCCEEDED(hr);
+}
+
+
+// The code in Launch() basically calls the Create Method of the Win32_Process
+// CIM class is documented here:
+// http://msdn2.microsoft.com/en-us/library/aa389388(VS.85).aspx
+
+bool WMIProcess::Launch(const std::wstring& command_line, int* process_id) {
+  ScopedComPtr<IWbemServices> wmi_local;
+  if (!WMI::CreateLocalConnection(true, wmi_local.Receive()))
+    return false;
+
+  const wchar_t class_name[] = L"Win32_Process";
+  const wchar_t method_name[] = L"Create";
+  ScopedComPtr<IWbemClassObject> process_create;
+  if (!WMI::CreateClassMethodObject(wmi_local, class_name, method_name,
+                                    process_create.Receive()))
+    return false;
+
+  VariantHelper b_command_line(VT_BSTR);
+  b_command_line.bstrVal = ::SysAllocString(command_line.c_str());
+
+  if (!SetParameter(process_create, L"CommandLine", &b_command_line))
+    return false;
+
+  ScopedComPtr<IWbemClassObject> out_params;
+  HRESULT hr = wmi_local->ExecMethod(StackBstr(class_name),
+                                     StackBstr(method_name), 0, NULL,
+                                     process_create, out_params.Receive(),
+                                     NULL);
+  if (FAILED(hr))
+    return false;
+
+  VariantHelper ret_value;
+  hr = out_params->Get(L"ReturnValue", 0, &ret_value, NULL, 0);
+  if (FAILED(hr) || (0 != ret_value.uintVal))
+    return false;
+
+  VariantHelper pid;
+  hr = out_params->Get(L"ProcessId", 0, &pid, NULL, 0);
+  if (FAILED(hr) || (0 == pid.intVal))
+    return false;
+
+  if (process_id)
+    *process_id = pid.intVal;
+
+  return true;
+}
+
+}  // namespace installer