Method GetExePath

lib/base/application.cpp:481–549

* Retrieves the full path of the executable. * * @param argv0 The first command-line argument. * @returns The path. */

 * @returns The path.
 */
String Application::GetExePath(const String& argv0)
{
	String executablePath;

#ifndef _WIN32
	char buffer[MAXPATHLEN];
	if (!getcwd(buffer, sizeof(buffer))) {
		BOOST_THROW_EXCEPTION(posix_error()
			<< boost::errinfo_api_function("getcwd")
			<< boost::errinfo_errno(errno));
	}

	String workingDirectory = buffer;

	if (argv0[0] != '/')
		executablePath = workingDirectory + "/" + argv0;
	else
		executablePath = argv0;

	bool foundSlash = false;
	for (size_t i = 0; i < argv0.GetLength(); i++) {
		if (argv0[i] == '/') {
			foundSlash = true;
			break;
		}
	}

	if (!foundSlash) {
		String pathEnv = Utility::GetFromEnvironment("PATH");
		if (!pathEnv.IsEmpty()) {
			std::vector<String> paths = String(pathEnv).Split(":");

			bool foundPath = false;
			for (const String& path : paths) {
				String pathTest = path + "/" + argv0;

				if (access(pathTest.CStr(), X_OK) == 0) {
					executablePath = pathTest;
					foundPath = true;
					break;
				}
			}

			if (!foundPath) {
				executablePath.Clear();
				BOOST_THROW_EXCEPTION(std::runtime_error("Could not determine executable path."));
			}
		}
	}

	if (!realpath(executablePath.CStr(), buffer)) {
		BOOST_THROW_EXCEPTION(posix_error()
			<< boost::errinfo_api_function("realpath")
			<< boost::errinfo_errno(errno)
			<< boost::errinfo_file_name(executablePath));
	}

	return buffer;