1// Copyright 2010 The Kyua Authors. 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 "utils/cmdline/globals.hpp" 30 31#include "utils/format/macros.hpp" 32#include "utils/logging/macros.hpp" 33#include "utils/fs/path.hpp" 34#include "utils/sanity.hpp" 35 36namespace cmdline = utils::cmdline; 37 38namespace { 39 40 41/// The name of the binary used to execute the program. 42static std::string Progname; 43 44 45} // anonymous namespace 46 47 48/// Initializes the global state of the CLI. 49/// 50/// This function can only be called once during the execution of a program, 51/// unless override_for_testing is set to true. 52/// 53/// \param argv0 The value of argv[0]; i.e. the program name. 54/// \param override_for_testing Should always be set to false unless for tests 55/// of this functionality, which may set this to true to redefine internal 56/// state. 57void 58cmdline::init(const char* argv0, const bool override_for_testing) 59{ 60 if (!override_for_testing) 61 PRE_MSG(Progname.empty(), "cmdline::init called more than once"); 62 Progname = utils::fs::path(argv0).leaf_name(); 63 LD(F("Program name: %s") % Progname); 64 POST(!Progname.empty()); 65} 66 67 68/// Gets the program name. 69/// 70/// \pre init() must have been called in advance. 71/// 72/// \return The program name. 73const std::string& 74cmdline::progname(void) 75{ 76 PRE_MSG(!Progname.empty(), "cmdline::init not called yet"); 77 return Progname; 78} 79