command line processing for thin_restore

thin_restore.cc

@@ -2,16 +2,62 @@
 
 #include "metadata.h"
 
+#include <boost/program_options.hpp>
+
 using namespace persistent_data;
 using namespace std;
 using namespace thin_provisioning;
 
+namespace po = boost::program_options;
+
 //----------------------------------------------------------------
 
+namespace {
+	void restore(string const &backup_file, string const &dev) {
+		cerr << "not implemented" << endl;
+	}
+
+	void usage(po::options_description const &desc) {
+		cerr << "Usage: thin_restore [options]" << endl << endl;
+		cerr << desc;
+	}
+}
+
 int main(int argc, char **argv)
 {
-	cerr << "not implemented yet" << endl;
+	po::options_description desc("Options");
+	desc.add_options()
+		("help", "Produce help message")
+		("input,i", po::value<string>(), "Input file")
+		("output,o", po::value<string>(), "Output file")
+		;
+
+	po::variables_map vm;
+	po::store(po::command_line_parser(argc, argv).options(desc).run(), vm);
+	po::notify(vm);
+
+	if (vm.count("help")) {
+		usage(desc);
 		return 0;
+	}
+
+	if (vm.count("input") != 1) {
+		cerr << "No input file provided." << endl;
+		usage(desc);
+		return 1;
+	}
+
+	if (vm.count("output") != 1) {
+		cerr << "No output file provided." << endl;
+		usage(desc);
+		return 1;
+	}
+
+	restore(vm["input"].as<string>(),
+		vm["output"].as<string>());
+
+	return 0;
+
 }
 
 //----------------------------------------------------------------