1  /*
 2   * Copyright (c) 2004 Apple Computer, Inc. All Rights Reserved.
 3   * 
 4   * @APPLE_LICENSE_HEADER_START@
 5   * 
 6   * This file contains Original Code and/or Modifications of Original Code
 7   * as defined in and that are subject to the Apple Public Source License
 8   * Version 2.0 (the 'License'). You may not use this file except in
 9   * compliance with the License. Please obtain a copy of the License at
10   * http://www.opensource.apple.com/apsl/ and read it before using this
11   * file.
12   * 
13   * The Original Code and all software distributed under the License are
14   * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15   * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16   * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17   * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18   * Please see the License for the specific language governing rights and
19   * limitations under the License.
20   * 
21   * @APPLE_LICENSE_HEADER_END@
22   */
23  
24  
25  //
26  // child - track a single child process and its belongings
27  //
28  #ifndef _CHILD_H_
29  #define _CHILD_H_  1
30  
31  #include <security_utilities/mach++.h>
32  #include <security_utilities/unixchild.h>
33  
34  using MachPlusPlus::Port;
35  using MachPlusPlus::TaskPort;
36  
37  
38  //
39  // ServerChild builds on the generic UNIX Child abstraction.
40  // The child is expected to engage in a checkin protocol after launch,
41  // whereby it RPC-calls childCheckIn in securityd and thus authenticates
42  // and declares readiness to provide service.
43  //
44  // @@@ PerWhat are these, if they are at all?
45  //
46  class ServerChild : public UnixPlusPlus::Child {
47  public:
48  	ServerChild();
49  	~ServerChild();
50  	
51  	Port servicePort() const { return mServicePort; }
52  	bool ready() const { return mServicePort; }
53  
54  public:
55  	static void checkIn(Port servicePort, pid_t pid);
56  
57  protected:
58  	void childAction() = 0;		// must be provided by subclass
59  	void parentAction();		// fully implemented
60  	void dying();				// fully implemented
61  
62  private:
63  	Port mServicePort;			// child's main service port
64  
65  private:
66  	typedef map<pid_t, ServerChild *> CheckinMap;
67  	static CheckinMap mCheckinMap;
68  
69  	// The parent side will wait on mCheckinCond until the child checks in
70  	// or fails. During that time ONLY, mCheckinLock protects the entire Child
71  	// object.
72  	static Mutex mCheckinLock;
73  	Condition mCheckinCond;
74  };
75  
76  
77  #endif // _CHILD_H_