Capability: passing fds over IPC

chrome/common/ipc_message_utils.h

 // Copyright (c) 2006-2008 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.
 
 #ifndef CHROME_COMMON_IPC_MESSAGE_UTILS_H_
 #define CHROME_COMMON_IPC_MESSAGE_UTILS_H_
 
 #include <string>
 #include <vector>
 #include <map>
 
 #include "base/file_path.h"
 #include "base/string_util.h"
 #include "base/tuple.h"
+#if defined(OS_POSIX)
+#include "chrome/common/file_descriptor_posix.h"
+#endif
 #include "chrome/common/ipc_sync_message.h"
 #include "chrome/common/thumbnail_score.h"
 #include "webkit/glue/cache_manager.h"
 #include "webkit/glue/console_message_level.h"
 #include "webkit/glue/find_in_page_request.h"
 #include "webkit/glue/webcursor.h"
 #include "webkit/glue/window_open_disposition.h"
 
 // Forward declarations.
 class GURL;
@@ skipping 630 matching lines @@
 };
 
 template <>
 struct ParamTraits<gfx::Size> {
   typedef gfx::Size param_type;
   static void Write(Message* m, const param_type& p);
   static bool Read(const Message* m, void** iter, param_type* r);
   static void Log(const param_type& p, std::wstring* l);
 };
 
+#if defined(OS_POSIX)
+
+template<>
+struct ParamTraits<FileDescriptor> {
+  typedef FileDescriptor param_type;
+  static void Write(Message* m, const param_type& p) {
+    if (p.auto_close) {
+      m->descriptor_set()->AddAndAutoClose(p.fd);
+    } else {
+      m->descriptor_set()->Add(p.fd);
+    }
+  }
+  static bool Read(const Message* m, void** iter, param_type* r) {
+    r->auto_close = false;
+    r->fd = m->descriptor_set()->NextDescriptor();
+
+    return r->fd >= 0;
+  }
+  static void Log(const param_type& p, std::wstring* l) {
+    if (p.auto_close) {
+      l->append(StringPrintf(L"FD(%d auto-close)", p.fd));
+    } else {
+      l->append(StringPrintf(L"FD(%d)", p.fd));
+    }
+  }
+};
+
+#endif // defined(OS_POSIX)
+
 template<>
 struct ParamTraits<ThumbnailScore> {
   typedef ThumbnailScore param_type;
   static void Write(Message* m, const param_type& p) {
     IPC::ParamTraits<double>::Write(m, p.boring_score);
     IPC::ParamTraits<bool>::Write(m, p.good_clipping);
     IPC::ParamTraits<bool>::Write(m, p.at_top);
     IPC::ParamTraits<base::Time>::Write(m, p.time_at_snapshot);
   }
   static bool Read(const Message* m, void** iter, param_type* r) {
@@ skipping 664 matching lines @@
     l->append(L"<FindInPageRequest>");
   }
 };
 
 //-----------------------------------------------------------------------------
 
 }  // namespace IPC
 
 #endif  // CHROME_COMMON_IPC_MESSAGE_UTILS_H_