diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..aa81c04
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,5 @@
+sbin_PROGRAMS = phosphor-gpio-monitor
+
+phosphor_gpio_monitor_SOURCES = \
+				argument.cpp \
+				mainapp.cpp
diff --git a/argument.cpp b/argument.cpp
new file mode 100644
index 0000000..41cf6f7
--- /dev/null
+++ b/argument.cpp
@@ -0,0 +1,95 @@
+/**
+ * Copyright © 2016 IBM Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <iostream>
+#include <iterator>
+#include <algorithm>
+#include <cassert>
+#include "argument.hpp"
+
+namespace phosphor
+{
+namespace gpio
+{
+
+using namespace std::string_literals;
+
+const std::string ArgumentParser::trueString = "true"s;
+const std::string ArgumentParser::emptyString = ""s;
+
+const char* ArgumentParser::optionStr = "p:k:r:t:?h";
+const option ArgumentParser::options[] =
+{
+    { "path",     required_argument,  nullptr,   'p' },
+    { "key",      required_argument,  nullptr,   'k' },
+    { "polarity", required_argument,  nullptr,   'r' },
+    { "target",   required_argument,  nullptr,   't' },
+    { "help",     no_argument,        nullptr,   'h' },
+    { 0, 0, 0, 0},
+};
+
+ArgumentParser::ArgumentParser(int argc, char** argv)
+{
+    int option = 0;
+    while (-1 != (option = getopt_long(argc, argv, optionStr, options, nullptr)))
+    {
+        if ((option == '?') || (option == 'h'))
+        {
+            usage(argv);
+            exit(-1);
+        }
+
+        auto i = &options[0];
+        while ((i->val != option) && (i->val != 0))
+        {
+            ++i;
+        }
+
+        if (i->val)
+        {
+            arguments[i->name] = (i->has_arg ? optarg : trueString);
+        }
+    }
+}
+
+const std::string& ArgumentParser::operator[](const std::string& opt)
+{
+    auto i = arguments.find(opt);
+    if (i == arguments.end())
+    {
+        return emptyString;
+    }
+    else
+    {
+        return i->second;
+    }
+}
+
+void ArgumentParser::usage(char** argv)
+{
+    std::cerr << "Usage: " << argv[0] << " [options]\n";
+    std::cerr << "Options:\n";
+    std::cerr << "  --help                  Print this menu\n";
+    std::cerr << "  --path=<path>           Path of input device."
+                                            " Ex: /dev/input/event2\n";
+    std::cerr << "  --key=<key>             Input GPIO key number\n";
+    std::cerr << "  --polarity=<polarity>   Asertion polarity to look for."
+                                            " This is 0 / 1 \n";
+    std::cerr << "  --target=<systemd unit> Systemd unit to be called on GPIO"
+                                            " state change\n";
+}
+} // namespace gpio
+} // namespace phosphor
diff --git a/argument.hpp b/argument.hpp
new file mode 100644
index 0000000..a6cccc7
--- /dev/null
+++ b/argument.hpp
@@ -0,0 +1,64 @@
+#pragma once
+
+#include <getopt.h>
+#include <map>
+#include <string>
+
+namespace phosphor
+{
+namespace gpio
+{
+/** @brief Class - Encapsulates parsing command line options and
+ *                 populating arguments
+ */
+class ArgumentParser
+{
+    public:
+        ArgumentParser() = delete;
+        ~ArgumentParser() = default;
+        ArgumentParser(const ArgumentParser&) = delete;
+        ArgumentParser& operator=(const ArgumentParser&) = delete;
+        ArgumentParser(ArgumentParser&&) = default;
+        ArgumentParser& operator=(ArgumentParser&&) = default;
+
+        /** @brief Contructs Argument object
+         *
+         *  @param argc - the main function's argc passed as is
+         *  @param argv - the main function's argv passed as is
+         *  @return Object constructed
+         */
+        ArgumentParser(int argc, char** argv);
+
+        /** @brief Given an option, returns its argument(optarg)
+         *
+         *  @param opt - command line option string
+         *
+         *  @return argument which is a standard optarg
+         */
+        const std::string& operator[](const std::string& opt);
+
+        /** @brief Displays usage
+         *
+         *  @param argv - the main function's argv passed as is
+         */
+        static void usage(char** argv);
+
+        /** @brief Set to 'true' when an option is passed */
+        static const std::string trueString;
+
+        /** @brief Set to '' when an option is not passed */
+        static const std::string emptyString;
+
+    private:
+        /** @brief Option to argument mapping */
+        std::map<const std::string, std::string> arguments;
+
+        /** @brief Array of struct options as needed by getopt_long */
+        static const option options[];
+
+        /** @brief optstring as needed by getopt_long */
+        static const char* optionStr;
+};
+
+} // namespace gpio
+} // namespace phosphor
diff --git a/bootstrap.sh b/bootstrap.sh
new file mode 100755
index 0000000..50b75b7
--- /dev/null
+++ b/bootstrap.sh
@@ -0,0 +1,18 @@
+#!/bin/sh
+
+AUTOCONF_FILES="Makefile.in aclocal.m4 ar-lib autom4te.cache compile \
+        config.guess config.h.in config.sub configure depcomp install-sh \
+        ltmain.sh missing *libtool test-driver"
+
+case $1 in
+    clean)
+        test -f Makefile && make maintainer-clean
+        for file in ${AUTOCONF_FILES}; do
+            find -name "$file" | xargs -r rm -rf
+        done
+        exit 0
+        ;;
+esac
+
+autoreconf -i
+echo 'Run "./configure ${CONFIGURE_FLAGS} && make"'
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..d7b4f75
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,23 @@
+# Initialization
+AC_PREREQ([2.69])
+AC_INIT([phosphor-gpio-monitor], [1.0], [https://github.com/openbmc/phosphor-gpio-monitor/issues])
+AC_LANG([C++])
+AC_CONFIG_HEADERS([config.h])
+AM_INIT_AUTOMAKE([subdir-objects -Wall -Werror foreign dist-xz])
+AM_SILENT_RULES([yes])
+
+# Checks for programs.
+AC_PROG_CXX
+AC_PROG_INSTALL
+AC_PROG_MAKE_SET
+
+# Checks for typedefs, structures, and compiler characteristics.
+AX_CXX_COMPILE_STDCXX_14([noext])
+AX_APPEND_COMPILE_FLAGS([-Wall -Werror], [CXXFLAGS])
+
+# For linking
+LT_INIT
+
+# Create configured output
+AC_CONFIG_FILES([Makefile])
+AC_OUTPUT
diff --git a/mainapp.cpp b/mainapp.cpp
new file mode 100644
index 0000000..671b73c
--- /dev/null
+++ b/mainapp.cpp
@@ -0,0 +1,64 @@
+/**
+ * Copyright © 2016 IBM Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <iostream>
+#include <string>
+#include "argument.hpp"
+
+static void exitWithError(const char* err, char** argv)
+{
+    phosphor::gpio::ArgumentParser::usage(argv);
+    std::cerr << "ERROR: " << err << "\n";
+    exit(EXIT_FAILURE);
+}
+
+int main(int argc, char** argv)
+{
+    // Read arguments.
+    auto options = phosphor::gpio::ArgumentParser(argc, argv);
+
+    // Parse out path argument.
+    auto path = (options)["path"];
+    if (path == phosphor::gpio::ArgumentParser::emptyString)
+    {
+        exitWithError("path not specified.", argv);
+    }
+
+    // Parse out key number that we are interested in
+    // Its integer mapping to the GPIO key configured by the kernel
+    auto key = (options)["key"];
+    if (key == phosphor::gpio::ArgumentParser::emptyString)
+    {
+        exitWithError("Key not specified.", argv);
+    }
+    // TODO : Convert key to integer
+
+    // Parse out assertion polarity interested in
+    // Its either 1 or 0 for press / release
+    auto polarity = (options)["polarity"];
+    if (polarity == phosphor::gpio::ArgumentParser::emptyString)
+    {
+        exitWithError("Polarity not specified.", argv);
+    }
+    // TODO : Convert polarity to integer
+
+    // Parse out target argument. It is fine if the caller does not
+    // pass this if they are not interested in calling into any target
+    // on meeting a condition.
+    auto target = (options)["target"];
+
+    return 0;
+}