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      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 
     36 class ContextsSerialized : public Contexts {
     37  public:
     38   virtual ~ContextsSerialized() override {
     39   }
     40 
     41   virtual bool Initialize(bool writable, const char* filename, bool* fsetxattr_failed) override;
     42   virtual prop_area* GetPropAreaForName(const char* name) override;
     43   virtual prop_area* GetSerialPropArea() override {
     44     return serial_prop_area_;
     45   }
     46   virtual void ForEach(void (*propfn)(const prop_info* pi, void* cookie), void* cookie) override;
     47   virtual void ResetAccess() override;
     48   virtual void FreeAndUnmap() override;
     49 
     50  private:
     51   bool InitializeContextNodes();
     52   bool InitializeProperties();
     53   bool MapSerialPropertyArea(bool access_rw, bool* fsetxattr_failed);
     54 
     55   const char* filename_;
     56   android::properties::PropertyInfoAreaFile property_info_area_file_;
     57   ContextNode* context_nodes_ = nullptr;
     58   size_t num_context_nodes_ = 0;
     59   size_t context_nodes_mmap_size_ = 0;
     60   prop_area* serial_prop_area_ = nullptr;
     61 };
     62