1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <getopt.h>
#include <sys/system_properties.h>
#include <iostream>
#include <string>
#include <vector>
#include <android-base/properties.h>
#include <property_info_parser/property_info_parser.h>
using android::base::GetProperty;
using android::properties::PropertyInfoAreaFile;
PropertyInfoAreaFile property_info_file;
enum class ResultType {
Value,
Context,
Type,
};
void PrintAllProperties(ResultType result_type) {
std::vector<std::pair<std::string, std::string>> properties;
__system_property_foreach(
[](const prop_info* pi, void* cookie) {
__system_property_read_callback(
pi,
[](void* cookie, const char* name, const char* value, unsigned) {
auto properties =
reinterpret_cast<std::vector<std::pair<std::string, std::string>>*>(cookie);
properties->emplace_back(name, value);
},
cookie);
},
&properties);
std::sort(properties.begin(), properties.end());
if (result_type != ResultType::Value) {
for (auto& [name, value] : properties) {
const char* context = nullptr;
const char* type = nullptr;
property_info_file->GetPropertyInfo(name.c_str(), &context, &type);
if (result_type == ResultType::Context) {
value = context;
} else {
value = type;
}
}
}
for (const auto& [name, value] : properties) {
std::cout << "[" << name << "]: [" << value << "]" << std::endl;
}
}
void PrintProperty(const char* name, const char* default_value, ResultType result_type) {
switch (result_type) {
case ResultType::Value:
std::cout << GetProperty(name, default_value) << std::endl;
break;
case ResultType::Context: {
const char* context = nullptr;
property_info_file->GetPropertyInfo(name, &context, nullptr);
std::cout << context << std::endl;
break;
}
case ResultType::Type: {
const char* type = nullptr;
property_info_file->GetPropertyInfo(name, nullptr, &type);
std::cout << type << std::endl;
break;
}
}
}
extern "C" int getprop_main(int argc, char** argv) {
auto result_type = ResultType::Value;
while (true) {
static const struct option long_options[] = {
{"help", no_argument, nullptr, 'h'},
{nullptr, 0, nullptr, 0},
};
int arg = getopt_long(argc, argv, "TZ", long_options, nullptr);
if (arg == -1) {
break;
}
switch (arg) {
case 'h':
std::cout << "usage: getprop [-TZ] [NAME [DEFAULT]]\n"
"\n"
"Gets an Android system property, or lists them all.\n"
"\n"
"-T\tShow property types instead of values\n"
"-Z\tShow property contexts instead of values\n"
<< std::endl;
return 0;
case 'T':
if (result_type != ResultType::Value) {
std::cerr << "Only one of -T or -Z may be specified" << std::endl;
return -1;
}
result_type = ResultType::Type;
break;
case 'Z':
if (result_type != ResultType::Value) {
std::cerr << "Only one of -T or -Z may be specified" << std::endl;
return -1;
}
result_type = ResultType::Context;
break;
case '?':
return -1;
default:
std::cerr << "getprop: getopt returned invalid result: " << arg << std::endl;
return -1;
}
}
if (result_type != ResultType::Value) {
property_info_file.LoadDefaultPath();
if (!property_info_file) {
std::cerr << "Unable to load property info file" << std::endl;
return -1;
}
}
if (optind >= argc) {
PrintAllProperties(result_type);
return 0;
}
if (optind < argc - 2) {
std::cerr << "getprop: Max 2 arguments (see \"getprop --help\")" << std::endl;
return -1;
}
PrintProperty(argv[optind], (optind == argc - 1) ? "" : argv[optind + 1], result_type);
return 0;
}
|
