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