diff -r a4c3f27b6be7 -r 1581a99ab33f c++/parameter-lister/CLI.cpp
--- a/c++/parameter-lister/CLI.cpp	Sun May 03 17:05:51 2015 +0200
+++ b/c++/parameter-lister/CLI.cpp	Sun May 03 18:08:40 2015 +0200
@@ -2,12 +2,31 @@
 #include <iostream>
 #include <vector>
 #include <algorithm>
+#include <boost/optional.hpp>
 
-#include "info/globalcode/terminalCodes/TerminalCodes.h"
+#include "info/globalcode/parameterLister/terminalCodes/TerminalCodes.h"
 
 using namespace std;
 using namespace info::globalcode::parameterLister;
 
+namespace info {
+namespace globalcode {
+namespace parameterLister {
+
+boost::optional<string> getenv(const string name) {
+	const char * value = ::getenv(name.c_str());
+	if (value == 0) {
+		return boost::optional<string>();
+	} else {
+		return boost::optional<string>(value);
+	}
+}
+
+
+}
+}
+}
+
 int main(int argc, char* argv[]) {
 	terminalCodes::Modifier fgGreen(terminalCodes::FG_GREEN);
 	terminalCodes::Modifier fgReset(terminalCodes::FG_DEFAULT);
@@ -31,24 +50,17 @@
 		cout << i + 1 << ":" << s.length() << " = \"" << s << "\"" << endl;
 	}
 
+	{
+		string envName = args[0];
+		boost::optional<string> outputModule = getenv(envName);
 
+		if (outputModule.is_initialized()) {
+			cout << "ENV: " << envName << " = " << outputModule.get();
+		} else {
+			cout << "ENV: " << envName << " is missing";
+		}
+	}
 
 
 	return 0;
-}
-
-
-
-namespace info {
-namespace globalcode {
-namespace parameterLister {
-
-
-
-
-
-}
-}
-}
-
-
+}
\ No newline at end of file