1 /*
2  * Copyright (C) 2017 The Android Open Source Project
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *  * Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  *  * Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in
12  *    the documentation and/or other materials provided with the
13  *    distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 
29 #pragma once
30 
31 #include <property_info_parser/property_info_parser.h>
32 
33 #include "context_node.h"
34 #include "contexts.h"
35 #include "properties_filename.h"
36 
37 class ContextsSerialized : public Contexts {
38  public:
~ContextsSerialized()39   virtual ~ContextsSerialized() override {
40   }
41 
42   virtual bool Initialize(bool writable, const char* dirname, bool* fsetxattr_failed,
43                           bool load_default_path) override;
44   virtual prop_area* GetPropAreaForName(const char* name) override;
GetSerialPropArea()45   virtual prop_area* GetSerialPropArea() override {
46     return serial_prop_area_;
47   }
48   virtual void ForEach(void (*propfn)(const prop_info* pi, void* cookie), void* cookie) override;
49   virtual void ResetAccess() override;
50   virtual void FreeAndUnmap() override;
51 
52  private:
53   bool InitializeContextNodes();
54   bool InitializeProperties(bool load_default_path);
55   bool MapSerialPropertyArea(bool access_rw, bool* fsetxattr_failed);
56 
57   const char* dirname_;
58   PropertiesFilename tree_filename_;
59   PropertiesFilename serial_filename_;
60   android::properties::PropertyInfoAreaFile property_info_area_file_;
61   ContextNode* context_nodes_ = nullptr;
62   size_t num_context_nodes_ = 0;
63   size_t context_nodes_mmap_size_ = 0;
64   prop_area* serial_prop_area_ = nullptr;
65 };
66