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// Copyright (c) 2011 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 "remoting/host/curtain.h"
#include <ApplicationServices/ApplicationServices.h>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/logging.h"
#include "base/mac/scoped_cftyperef.h"
namespace {
static const char* kCGSessionPath =
"/System/Library/CoreServices/Menu Extras/User.menu/Contents/Resources/"
"CGSession";
}
namespace remoting {
namespace {
class CurtainMac : public Curtain {
public:
CurtainMac() {}
virtual void EnableCurtainMode(bool enable) OVERRIDE;
private:
DISALLOW_COPY_AND_ASSIGN(CurtainMac);
};
void CurtainMac::EnableCurtainMode(bool enable) {
// Whether curtain mode is being enabled or disabled, switch out the session
// if the current user is switched in.
// TODO(jamiewalch): If curtain mode is being enabled at the login screen, it
// should be deferred until the user logs in.
base::mac::ScopedCFTypeRef<CFDictionaryRef> session(
CGSessionCopyCurrentDictionary());
if (CFDictionaryGetValue(session,
kCGSessionOnConsoleKey) == kCFBooleanTrue) {
pid_t child = fork();
if (child == 0) {
execl(kCGSessionPath, kCGSessionPath, "-suspend", (char*)0);
exit(1);
} else if (child > 0) {
int status = 0;
waitpid(child, &status, 0);
// To ensure that the system has plenty of time to notify the CGDisplay-
// ReconfigurationCallback, sleep here. 1s is probably overkill.
sleep(1);
}
}
}
} // namespace
Curtain* Curtain::Create() {
// There's no need to check for curtain mode being enabled here because on
// the mac it's easy for a local user to recover if anything crashes while
// a session is active--they just have to enter a password to switch their
// session back in.
return new CurtainMac();
}
} // namespace remoting
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