Util: Add class System for executing OS shell commands

src/util/system.h

@@ -0,0 +1,47 @@
+#ifndef SYSTEM_H
+#define SYSTEM_H
+
+#include <cstddef>    // size_t
+#include <functional> // function
+#include <string>
+#include <string_view>
+#include <vector>
+
+namespace Util {
+
+using SplitCallback = std::function<void(size_t, char*)>;
+
+class System {
+public:
+	System() {}
+	virtual ~System() {}
+
+	enum FileDescriptor {
+		ReadFileDescriptor,
+		WriteFileDescriptor,
+	};
+
+	void operator()(const char* command);
+	void operator()(std::string command);
+	void operator()(std::string_view command);
+	void operator()(const std::vector<const char*>& arguments);
+	void operator()(const std::vector<std::string>& arguments);
+	void operator()(const std::vector<std::string_view>& arguments);
+
+	std::string output() const { return m_output; }
+	std::string error() const { return m_error; }
+	int status() const { return m_status; }
+
+private:
+	void operator()(const std::vector<char*>& arguments);
+	void readFromFileDescriptor(int fileDescriptor[2], std::string& output);
+	size_t split(char* split, const char* delimiters, SplitCallback callback = {});
+
+	std::string m_output;
+	std::string m_error;
+	int m_status { 0 };
+};
+
+} // namespace Util
+
+#endif // SYSTEM_H