1// Copyright 2010 Google Inc. 2// All rights reserved. 3// 4// Redistribution and use in source and binary forms, with or without 5// modification, are permitted provided that the following conditions are 6// met: 7// 8// * Redistributions of source code must retain the above copyright 9// notice, this list of conditions and the following disclaimer. 10// * Redistributions in binary form must reproduce the above copyright 11// notice, this list of conditions and the following disclaimer in the 12// documentation and/or other materials provided with the distribution. 13// * Neither the name of Google Inc. nor the names of its contributors 14// may be used to endorse or promote products derived from this software 15// without specific prior written permission. 16// 17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 29#include <cstdlib> 30#include <cstring> 31#include <iostream> 32#include <sstream> 33 34 35static int 36print_args(int argc, char* argv[]) 37{ 38 for (int i = 0; i < argc; i++) 39 std::cout << "argv[" << i << "] = " << argv[i] << "\n"; 40 std::cout << "argv[" << argc << "] = NULL"; 41 return EXIT_SUCCESS; 42} 43 44 45static int 46return_code(int argc, char* argv[]) 47{ 48 if (argc != 3) 49 std::abort(); 50 51 std::istringstream iss(argv[2]); 52 int code; 53 iss >> code; 54 return code; 55} 56 57 58int 59main(int argc, char* argv[]) 60{ 61 if (argc < 2) { 62 std::cerr << "Must provide a helper name\n"; 63 std::exit(EXIT_FAILURE); 64 } 65 66 if (std::strcmp(argv[1], "print-args") == 0) { 67 return print_args(argc, argv); 68 } else if (std::strcmp(argv[1], "return-code") == 0) { 69 return return_code(argc, argv); 70 } else { 71 std::cerr << "Unknown helper\n"; 72 return EXIT_FAILURE; 73 } 74} 75