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// Copyright (c) 2014 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 "components/browser_watcher/watcher_client_win.h"
#include <windows.h>
#include "base/command_line.h"
#include "base/logging.h"
#include "base/process/launch.h"
#include "base/win/windows_version.h"
namespace browser_watcher {
namespace {
base::Process OpenOwnProcessInheritable() {
return base::Process(
::OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
TRUE, // Ineritable handle.
base::GetCurrentProcId()));
}
} // namespace
WatcherClient::WatcherClient(const CommandLineGenerator& command_line_generator)
: use_legacy_launch_(base::win::GetVersion() < base::win::VERSION_VISTA),
command_line_generator_(command_line_generator),
process_(base::kNullProcessHandle) {
}
WatcherClient::~WatcherClient() {
}
void WatcherClient::LaunchWatcher() {
DCHECK(!process_.IsValid());
// Build the command line for the watcher process.
base::Process self = OpenOwnProcessInheritable();
DCHECK(self.IsValid());
base::CommandLine cmd_line(command_line_generator_.Run(self.Handle()));
base::HandlesToInheritVector to_inherit;
base::LaunchOptions options;
options.start_hidden = true;
if (use_legacy_launch_) {
// Launch the child process inheriting all handles on XP.
options.inherit_handles = true;
} else {
// Launch the child process inheriting only |self| on
// Vista and better.
to_inherit.push_back(self.Handle());
to_inherit.insert(to_inherit.end(), inherited_handles_.begin(),
inherited_handles_.end());
options.handles_to_inherit = &to_inherit;
}
process_ = base::LaunchProcess(cmd_line, options);
if (!process_.IsValid())
LOG(ERROR) << "Failed to launch browser watcher.";
}
void WatcherClient::AddInheritedHandle(HANDLE handle) {
inherited_handles_.push_back(handle);
}
} // namespace browser_watcher
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