#include "mycmd.h"
#include <QProcess>

MyCmd* MyCmd::instance = nullptr;

MyCmd::MyCmd(QObject *parent)
    : QObject{parent}
{

}

MyCmd *MyCmd::getInstance()
{
    if(instance == nullptr)
    {
        instance = new MyCmd();
    }
    return instance;
}

QString MyCmd::runCmd(QString cmd)
{
    QProcess pro;
    QString result;
    pro.start(cmd);       //执行命令
    pro.waitForStarted();   //等待程序启动
    pro.waitForFinished();  //等待程序执行结束
    result = pro.readAllStandardOutput();   //读取正确信息
    if(result.isEmpty())    //返回了错误信息
    {
        result = QString("[Error]") + pro.readAllStandardError();
    }
    pro.close();				//关闭外部程序
    return result;
}