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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef SECTIONS_H
     18 #define SECTIONS_H
     19 
     20 #include "FdBuffer.h"
     21 
     22 #include <utils/String8.h>
     23 #include <utils/String16.h>
     24 #include <utils/Vector.h>
     25 
     26 using namespace android;
     27 
     28 /**
     29  * Base class for sections
     30  */
     31 class Section
     32 {
     33 public:
     34     int id;
     35     String8 name;
     36 
     37     Section(int id);
     38     virtual ~Section();
     39 
     40     virtual status_t Execute(ReportRequestSet* requests) const = 0;
     41 
     42     status_t WriteHeader(ReportRequestSet* requests, size_t size) const;
     43 };
     44 
     45 /**
     46  * Section that reads in a file.
     47  */
     48 class FileSection : public Section
     49 {
     50 public:
     51     FileSection(int id, const char* filename);
     52     virtual ~FileSection();
     53 
     54     virtual status_t Execute(ReportRequestSet* requests) const;
     55 
     56 private:
     57     const char* mFilename;
     58 };
     59 
     60 /**
     61  * Base class for sections that call a command that might need a timeout.
     62  */
     63 class WorkerThreadSection : public Section
     64 {
     65 public:
     66     WorkerThreadSection(int id);
     67     virtual ~WorkerThreadSection();
     68 
     69     virtual status_t Execute(ReportRequestSet* requests) const;
     70 
     71     virtual status_t BlockingCall(int pipeWriteFd) const = 0;
     72 };
     73 
     74 /**
     75  * Section that forks and execs a command, and puts stdout as the section.
     76  */
     77 class CommandSection : public Section
     78 {
     79 public:
     80     CommandSection(int id, const char* first, ...);
     81     virtual ~CommandSection();
     82 
     83     virtual status_t Execute(ReportRequestSet* requests) const;
     84 
     85 private:
     86     const char** mCommand;
     87 };
     88 
     89 /**
     90  * Section that calls dumpsys on a system service.
     91  */
     92 class DumpsysSection : public WorkerThreadSection
     93 {
     94 public:
     95     DumpsysSection(int id, const char* service, ...);
     96     virtual ~DumpsysSection();
     97 
     98     virtual status_t BlockingCall(int pipeWriteFd) const;
     99 
    100 private:
    101     String16 mService;
    102     Vector<String16> mArgs;
    103 };
    104 
    105 #endif // SECTIONS_H
    106 
    107