1 /**
2  * Copyright © 2016 IBM Corporation
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 #include <iostream>
18 #include <string>
19 #include "argument.hpp"
20 #include "monitor.hpp"
21 
22 static void exitWithError(const char* err, char** argv)
23 {
24     phosphor::gpio::ArgumentParser::usage(argv);
25     std::cerr << "ERROR: " << err << "\n";
26     exit(EXIT_FAILURE);
27 }
28 
29 int main(int argc, char** argv)
30 {
31     // Read arguments.
32     auto options = phosphor::gpio::ArgumentParser(argc, argv);
33 
34     // Parse out path argument.
35     auto path = (options)["path"];
36     if (path == phosphor::gpio::ArgumentParser::emptyString)
37     {
38         exitWithError("path not specified.", argv);
39     }
40 
41     // Parse out key number that we are interested in
42     // Its integer mapping to the GPIO key configured by the kernel
43     auto key = (options)["key"];
44     if (key == phosphor::gpio::ArgumentParser::emptyString)
45     {
46         exitWithError("Key not specified.", argv);
47     }
48 
49     // Parse out assertion polarity interested in
50     // Its either 1 or 0 for press / release
51     auto polarity = (options)["polarity"];
52     if (polarity == phosphor::gpio::ArgumentParser::emptyString)
53     {
54         exitWithError("Polarity not specified.", argv);
55     }
56 
57     // Parse out target argument. It is fine if the caller does not
58     // pass this if they are not interested in calling into any target
59     // on meeting a condition.
60     auto target = (options)["target"];
61 
62     // Create a GPIO monitor object and let it do all the rest
63     phosphor::gpio::Monitor monitor(path, std::stoi(key),
64                                     std::stoi(polarity),target);
65 
66     return 0;
67 }
68