Add initial files for physical LED controller

This daemon uses sysfs entry for a particular LED and then triggers
necessary action. Name and Path of the LED is needed as command line
options to make sure this is genreric implementation.

Change-Id: I3d52f1491fcb6ae8119b399a4d2c6770a3f5db30
Signed-off-by: Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com>

6 files changed, 252 insertions, 0 deletions

diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..fdf4020
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,6 @@
+sbin_PROGRAMS = phosphor-ledcontroller
+
+phosphor_ledcontroller_SOURCES = controller.cpp argument.cpp
+
+phosphor_ledcontroller_LDFLAGS = $(SYSTEMD_LIBS)
+phosphor_ledcontroller_CFLAGS = $(SYSTEMD_CFLAGS)
diff --git a/argument.cpp b/argument.cpp
new file mode 100644
index 0000000..3df84e7
--- /dev/null
+++ b/argument.cpp
@@ -0,0 +1,83 @@
+/**
+ * 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 led
+{
+
+const std::string ArgumentParser::true_string = "true";
+const std::string ArgumentParser::empty_string = "";
+
+const char* ArgumentParser::optionstr = "n:p:?h";
+const option ArgumentParser::options[] =
+{
+    { "name",   required_argument,  nullptr,   'n' },
+    { "path",   required_argument,  nullptr,   'p' },
+    { "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 : true_string);
+    }
+}
+
+const std::string& ArgumentParser::operator[](const std::string& opt)
+{
+    auto i = arguments.find(opt);
+    if (i == arguments.end())
+    {
+        return empty_string;
+    }
+    else
+    {
+        return i->second;
+    }
+}
+
+void ArgumentParser::usage(char** argv)
+{
+    std::cerr << "Usage: " << argv[0] << " [options]" << std::endl;
+    std::cerr << "Options:" << std::endl;
+    std::cerr << "    --help               Print this menu" << std::endl;
+    std::cerr << "    --name=<name>        Name of the LED"
+              << std::endl;
+    std::cerr << "    --path=<path>        sysfs path like /sys/class/leds"
+              << std::endl;
+}
+} // namespace led
+} // namespace phosphor
diff --git a/argument.hpp b/argument.hpp
new file mode 100644
index 0000000..28b2966
--- /dev/null
+++ b/argument.hpp
@@ -0,0 +1,58 @@
+#ifndef __ARGUMENT_H
+#define __ARGUMENT_H
+#include <getopt.h>
+#include <map>
+#include <string>
+
+namespace phosphor
+{
+namespace led
+{
+/** @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 a option, returns its argument(optarg) */
+        const std::string& operator[](const std::string& opt);
+
+        /** @brief Displays usage */
+        static void usage(char** argv);
+
+        /** @brief Set to 'true' when an option is passed */
+        static const std::string true_string;
+
+        /** @brief Set to '' when an option is not passed */
+        static const std::string empty_string;
+
+    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 led
+} // namespace phosphor
+
+#endif
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 ${CONFIGURE_FLAGS} && make"'
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..b38f165
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,38 @@
+# Initialization
+AC_PREREQ([2.69])
+AC_INIT([phosphor-led-sysfs], [1.0], [https://github.com/openbmc/phosphor-led-sysfs/issues])
+AC_LANG([C++])
+AC_CONFIG_HEADERS([config.h])
+AM_INIT_AUTOMAKE([subdir-objects -Wall -Werror foreign dist-xz])
+AM_SILENT_RULES([yes])
+
+# Checks for programs.
+AC_PROG_CXX
+AC_PROG_INSTALL
+AC_PROG_MAKE_SET
+
+# Checks for libraries.
+PKG_CHECK_MODULES([SYSTEMD], [libsystemd >= 221])
+
+# Checks for typedefs, structures, and compiler characteristics.
+AX_CXX_COMPILE_STDCXX_14([noext])
+AX_APPEND_COMPILE_FLAGS([-Wall -Werror], [CXXFLAGS])
+
+# Checks for header files.
+AC_CHECK_HEADER(systemd/sd-bus.h, ,[AC_MSG_ERROR([Could not find systemd/sd-bus.h...systemd developement package required])])
+AC_CHECK_HEADER(sdbusplus/server.hpp, ,[AC_MSG_ERROR([Could not find server.hpp...openbmc/sdbusplus package required])])
+
+# Check/set gtest specific functions.
+AX_PTHREAD([GTEST_CPPFLAGS="-DGTEST_HAS_PTHREAD=1"],[GTEST_CPPFLAGS="-DGTEST_HAS_PTHREAD=0"])
+AC_SUBST(GTEST_CPPFLAGS)
+
+AC_ARG_VAR(BUSNAME, [The Dbus busname to own])
+AS_IF([test "x$BUSNAME" == "x"], [BUSNAME="xyz.openbmc_project.led.controller"])
+AC_DEFINE_UNQUOTED([BUSNAME], ["$BUSNAME"], [The Dbus busname to own])
+AC_ARG_VAR(OBJPATH, [The Ledmanager Dbus root])
+AS_IF([test "x$OBJPATH" == "x"], [OBJPATH="/xyz/openbmc_project/led/controller"])
+AC_DEFINE_UNQUOTED([OBJPATH], ["$OBJPATH"], [The Led controller Dbus root])
+
+# Create configured output
+AC_CONFIG_FILES([Makefile])
+AC_OUTPUT
diff --git a/controller.cpp b/controller.cpp
new file mode 100644
index 0000000..8db607c
--- /dev/null
+++ b/controller.cpp
@@ -0,0 +1,49 @@
+/**
+ * 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 <memory>
+#include "argument.hpp"
+
+static void ExitWithError(const char* err, char** argv)
+{
+    phosphor::led::ArgumentParser::usage(argv);
+    std::cerr << std::endl;
+    std::cerr << "ERROR: " << err << std::endl;
+    exit(-1);
+}
+
+int main(int argc, char** argv)
+{
+    // Read arguments.
+    auto options = phosphor::led::ArgumentParser(argc, argv);
+
+    // Parse out Name argument.
+    auto name = std::move((options)["name"]);
+    if (name == phosphor::led::ArgumentParser::empty_string)
+    {
+        ExitWithError("Name not specified.", argv);
+    }
+
+    // Parse out Name argument.
+    auto path = std::move((options)["path"]);
+    if (path == phosphor::led::ArgumentParser::empty_string)
+    {
+        ExitWithError("Path not specified.", argv);
+    }
+
+    return 0;
+}