Section.h revision 1754d744a7a34731ffc07af1bc3dbfcb06864ab0 
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
26using namespace android;
27
28/**
29 * Base class for sections
30 */
31class Section
32{
33public:
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 */
48class FileSection : public Section
49{
50public:
51    FileSection(int id, const char* filename);
52    virtual ~FileSection();
53
54    virtual status_t Execute(ReportRequestSet* requests) const;
55
56private:
57    const char* mFilename;
58};
59
60/**
61 * Base class for sections that call a command that might need a timeout.
62 */
63class WorkerThreadSection : public Section
64{
65public:
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 */
77class CommandSection : public Section
78{
79public:
80    CommandSection(int id, const char* first, ...);
81    virtual ~CommandSection();
82
83    virtual status_t Execute(ReportRequestSet* requests) const;
84
85private:
86    const char** mCommand;
87};
88
89/**
90 * Section that calls dumpsys on a system service.
91 */
92class DumpsysSection : public WorkerThreadSection
93{
94public:
95    DumpsysSection(int id, const char* service, ...);
96    virtual ~DumpsysSection();
97
98    virtual status_t BlockingCall(int pipeWriteFd) const;
99
100private:
101    String16 mService;
102    Vector<String16> mArgs;
103};
104
105#endif // SECTIONS_H
106
107