add battery

src/json/cmdhelper.h

@@ -0,0 +1,28 @@
+#ifndef CMDHELPER_H
+#define CMDHELPER_H
+
+#include <QObject>
+#include <QString>
+class cmdHelper : public QObject
+{
+	Q_OBJECT
+public:
+
+	static cmdHelper* Instance()
+	{
+		static cmdHelper obj;
+		return &obj;
+	}
+	bool getDiskSize(double& size);
+	bool getDiskUsed(double& used);
+
+	QString getLinuxVersion();
+	QString getDCMTKVersion();
+
+private:
+	bool exec(const char* cmd, std::string& result);
+	bool exec2(const char* cmd, std::string& result);
+	explicit cmdHelper(QObject* parent = nullptr);
+};
+
+#endif // CMDHEPLER_H