Qt linux获取cpu使用率、内存、网络收发速度、磁盘读写速度、磁盘剩余空间等

Qt linux获取cpu使用率、内存、网络收发速度、磁盘读写速度、磁盘剩余空间等，实际上大部分都和qt无关的，用其他语言也可以获取。
code:
.h

#ifndef RESOURCE_MINITOR_H
#define RESOURCE_MINITOR_H
#include <QObject>
#include <QTimer>
#include <QProcess>
#include <QDebug>
class resource_minitor : public QObject
{Q_OBJECT
public:explicit resource_minitor(QObject *parent = nullptr);
private slots:void get_resource__();
private:bool get_mem_usage__();bool get_net_usage__();bool get_disk_speed__();bool get_cpu_usage__();bool get_disk_space__();bool get_path_space(const QString & path);
private:const int m_timer_interval__ = 1000;QTimer monitor_timer__;double m_send_bytes__ = 0;double m_recv_bytes__ = 0;double m_disk_read__ = 0;double m_disk_write__ = 0;double m_cpu_total__ = 0;double m_cpu_use__ = 0;
};
#endif // RESOURCE_MINITOR_H

.cpp

#include "resource_minitor.h"
#include "sys/statfs.h"
resource_minitor::resource_minitor(QObject *parent) : QObject(parent)
{connect(&monitor_timer__, &QTimer::timeout, this, &resource_minitor::get_resource__);monitor_timer__.start(m_timer_interval__);
}
void resource_minitor::get_resource__()
{get_cpu_usage__ ();get_disk_speed__();get_mem_usage__ ();get_net_usage__ ();get_disk_space__();get_path_space("/");qDebug()<<"\n";
}
bool resource_minitor::get_mem_usage__()
{QProcess process;process.start("free -m"); //使用free完成获取process.waitForFinished();process.readLine();QString str = process.readLine();str.replace("\n","");str.replace(QRegExp("( ){1,}")," ");//将连续空格替换为单个空格 用于分割auto lst = str.split(" ");if(lst.size() > 6){qDebug("mem total:%.0lfMB free:%.0lfMB",lst[1].toDouble(),lst[6].toDouble());return true;}return false;
}
bool resource_minitor::get_net_usage__()
{QProcess process;process.start("cat /proc/net/dev"); //读取文件/proc/net/dev获取网络收发包数量，再除取样时间得到网络速度process.waitForFinished();process.readLine();process.readLine();while(!process.atEnd()){QString str = process.readLine();str.replace("\n","");str.replace(QRegExp("( ){1,}")," ");auto lst = str.split(" ");if(lst.size() > 9 && lst[0] == "enp2s0:"){double recv = 0;double send = 0;if(lst.size() > 1)recv = lst[1].toDouble();if(lst.size() > 9)send = lst[9].toDouble();qDebug("%s 接收速度:%.0lfbyte/s 发送速度:%.0lfbyte/s",lst[0].toStdString().c_str(),(recv - m_recv_bytes__) / (m_timer_interval__ / 1000.0),(send - m_send_bytes__) / (m_timer_interval__ / 1000.0));m_recv_bytes__ = recv;m_send_bytes__ = send;}}return true;
}
bool resource_minitor::get_cpu_usage__()
{QProcess process;process.start("cat /proc/stat");process.waitForFinished();QString str = process.readLine();str.replace("\n","");str.replace(QRegExp("( ){1,}")," ");auto lst = str.split(" ");if(lst.size() > 3){double use = lst[1].toDouble() + lst[2].toDouble() + lst[3].toDouble();double total = 0;for(int i = 1;i < lst.size();++i)total += lst[i].toDouble();if(total - m_cpu_total__ > 0){qDebug("cpu rate:%.2lf%%",(use - m_cpu_use__) / (total - m_cpu_total__) * 100.0);m_cpu_total__ = total;m_cpu_use__ = use;return true;}}return false;
}
bool resource_minitor::get_disk_speed__()
{QProcess process;process.start("iostat -k -d");process.waitForFinished();process.readLine();process.readLine();process.readLine();QString str = process.readLine();str.replace("\n","");str.replace(QRegExp("( ){1,}")," ");auto lst = str.split(" ");if(lst.size() > 5){qDebug("disk read:%.0lfkb/s disk write:%.0lfkb/s",(lst[4].toDouble() - m_disk_read__ ) / (m_timer_interval__ / 1000.0),(lst[5].toDouble() - m_disk_write__) / (m_timer_interval__ / 1000.0));m_disk_read__ = lst[4].toDouble();m_disk_write__ = lst[5].toDouble();return true;}return false;
}
bool resource_minitor::get_disk_space__()
{QProcess process;process.start("df -k");process.waitForFinished();process.readLine();while(!process.atEnd()){QString str = process.readLine();if(str.startsWith("/dev/sda")){str.replace("\n","");str.replace(QRegExp("( ){1,}")," ");auto lst = str.split(" ");if(lst.size() > 5)qDebug("挂载点:%s 已用:%.0lfMB 可用:%.0lfMB",lst[5].toStdString().c_str(),lst[2].toDouble()/1024.0,lst[3].toDouble()/1024.0);}}return true;
}
bool resource_minitor::get_path_space(const QString & path)
{struct statfs diskInfo;statfs(path.toUtf8().data(), &diskInfo);qDebug("%s 总大小:%.0lfMB 可用大小:%.0lfMB",path.toStdString().c_str(),(diskInfo.f_blocks * diskInfo.f_bsize)/1024.0/1024.0,(diskInfo.f_bavail * diskInfo.f_bsize)/1024.0/1024.0);return true;
}