1 #ifndef  VOLUME_H
 2 #define VOLUME_H
 3 #include <QtCore/QCoreApplication>
 4 #include <QtSql>
 5 #include <QTimer>
 6 class RVolume : public QObject
 7 {
 8     Q_OBJECT
 9 public:
10         RVolume(int);
11         ~RVolume();
12 private:
13      char m_cBuff[256];
14      char m_cName1[20];
15      char m_cName2[20];
16      char m_cName3[20];
17      char m_cUnit[20];
18      unsigned int m_nMemFree;
19      unsigned int m_nBuffers;
20      unsigned int m_nCached;
21      unsigned int m_nTotalFree;
22      QTimer * counter;
23      QSqlDatabase dbconn;
24 private slots:
25     void getVolume();
26 };
27
28  #endif

 1 #include <QtCore/QCoreApplication>
 2 #include <QObject>
 3 #include <QtSql>
 4 #include <QTime>
 5 #include <QSqlQuery>
 6 #include <QTextCodec>
 7 #include "rvolume.h"
 8
 9 RVolume::RVolume(int m_nTimer)
10 {
11     qDebug() << "The time interval is" <<m_nTimer<<"s.";
12     counter = new QTimer( this );
13     connect( counter, SIGNAL(timeout()),this, SLOT( getVolume()) );
14     counter->start((m_nTimer)*1000);
15
16      if(QSqlDatabase::contains("GBond"))
17      {
18          dbconn = QSqlDatabase::database("GBond");
19      }
20      else
21      {
22          dbconn = QSqlDatabase::addDatabase("QSQLITE", "GBond");
23      }
24      dbconn.setDatabaseName("/home/Data/Volume.db");
25 }
26
27 RVolume::~RVolume()
28 {
29     delete counter;
30 }
31
32 void RVolume::getVolume()
33 {
34      FILE *fd;
35      fd = fopen ("/proc/meminfo", "r");
36      fgets (m_cBuff, sizeof(m_cBuff), fd);
37      fgets (m_cBuff, sizeof(m_cBuff), fd);
38      sscanf (m_cBuff, "%s %u %s", m_cName1, &m_nMemFree,m_cUnit);
39      fgets (m_cBuff, sizeof(m_cBuff), fd);
40      sscanf (m_cBuff, "%s %u %s", m_cName2, &m_nBuffers,m_cUnit);
41      fgets (m_cBuff, sizeof(m_cBuff), fd);
42      sscanf (m_cBuff, "%s %u %s", m_cName3, &m_nCached,m_cUnit);
43      fclose(fd);
44
45      m_nTotalFree=m_nMemFree+m_nBuffers+m_nCached;
46      QDate date;
47      QVariantList itts;
48      itts << date.currentDate () ;
49
50      QTime time;
51      QVariantList imts;
52      imts << time.currentTime () ;
53
54      QVariantList ints;
55      ints << m_nTotalFree;
56
57      if (dbconn.open())
58      {
59          QSqlQuery query("create table volume(QDate dater,QTime timer,totalFree unsigned int)", dbconn);
60          query.prepare("insert into volume values (?, ?, ?)");
61          query.addBindValue(itts);
62          query.addBindValue(imts);
63          query.addBindValue(ints);
64          qDebug()<<"\n**** A new information was written into the table.**** ";
65          if (!query.execBatch())
66          {
67              qDebug() << query.lastError();
68          }
69      }
70  }

 1 #include <QtCore/QCoreApplication>
 2 #include <QTextStream>
 3 #include "rvolume.h"
 4
 5 int main(int argc, char *argv[])
 6  {
 7      QCoreApplication a(argc, argv);
 8      QTextStream out(stdout);
 9      if (argc < 3)
10      {
11          out << "Usage : volume -t time_interval(Unit seconds)" << endl;
12          exit(0);
13      }
14
15      const char *gs_cMark = "-t",*gs_cTime;
16      char *g_cMark_in = argv[1], *g_cTime_in = argv[2];
17      gs_cTime=g_cTime_in;
18      QString str =gs_cTime;
19      bool ok;
20      int g_nTimer = str. toInt( &ok, 10 );
21      if ( QString::compare(g_cMark_in,gs_cMark )!=0|| g_nTimer<=0)
22      {
23          out << "The mark or the time interval is invalid! Exit."<< endl ;
24          exit(0);
25      }
26      RVolume memory(g_nTimer);
27      return a.exec();
28  }

 1 ######################################################################
 2 # Automatically generated by qmake (2.01a) ?? 4? 17 15:00:26 2012
 3 ######################################################################
 4
 5 TEMPLATE = app
 6 QT -= gui
 7 QT += sql
 8 TARGET =
 9 DEPENDPATH += .
10 INCLUDEPATH += .
11
12 # Input
13 HEADERS += rvolume.h
14 SOURCES += main.cpp rvolume.cpp