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/resource_minitor/main.cpp

@@ -0,0 +1,11 @@
+#include "mainwindow.h"
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    MainWindow w;
+    w.show();
+
+    return a.exec();
+}

Qt/resource_minitor/mainwindow.cpp

@@ -0,0 +1,16 @@
+#include "mainwindow.h"
+#include "ui_mainwindow.h"
+
+MainWindow::MainWindow(QWidget *parent) :
+    QMainWindow(parent),
+    ui(new Ui::MainWindow)
+{
+    ui->setupUi(this);
+
+    p_res = new resource_minitor(this);
+}
+
+MainWindow::~MainWindow()
+{
+    delete ui;
+}

Qt/resource_minitor/mainwindow.h

@@ -0,0 +1,25 @@
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+#include "resource_minitor.h"
+
+namespace Ui {
+class MainWindow;
+}
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    explicit MainWindow(QWidget *parent = 0);
+    ~MainWindow();
+
+private:
+    Ui::MainWindow *ui;
+
+    resource_minitor * p_res;
+};
+
+#endif // MAINWINDOW_H

Qt/resource_minitor/mainwindow.ui

@@ -0,0 +1,24 @@
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow" >
+  <property name="geometry" >
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle" >
+   <string>MainWindow</string>
+  </property>
+  <widget class="QMenuBar" name="menuBar" />
+  <widget class="QToolBar" name="mainToolBar" />
+  <widget class="QWidget" name="centralWidget" />
+  <widget class="QStatusBar" name="statusBar" />
+ </widget>
+ <layoutDefault spacing="6" margin="11" />
+ <pixmapfunction></pixmapfunction>
+ <resources/>
+ <connections/>
+</ui>

Qt/resource_minitor/resource_minitor.cpp

@@ -0,0 +1,144 @@
+#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;
+}
+

Qt/resource_minitor/resource_minitor.h

@@ -0,0 +1,38 @@
+#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

Qt/resource_minitor/resource_minitor.pro

@@ -0,0 +1,36 @@
+#-------------------------------------------------
+#
+# Project created by QtCreator 2018-01-10T13:07:58
+#
+#-------------------------------------------------
+
+QT       += core gui
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+TARGET = resource_minitor
+TEMPLATE = app
+
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+
+SOURCES += \
+        main.cpp \
+        mainwindow.cpp \
+    resource_minitor.cpp
+
+HEADERS += \
+        mainwindow.h \
+    resource_minitor.h
+
+FORMS += \
+        mainwindow.ui