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/******************************************************************************
*
* Copyright (C) 2002 Hugo PEREIRA <mailto: hugo.pereira@free.fr>
*
* This is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* This software is distributed in the hope that it will be useful, but WITHOUT
* Any WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*
*******************************************************************************/
#include "JobThread.h"
#include <QDir>
#include <QFile>
#include <QMutexLocker>
#include <QTextStream>
#include <unistd.h>
//________________________________________________________________________
JobThread::JobThread( QObject* parent ):
QThread( parent ),
Counter( "JobThread" )
{ timer_.start(); }
//________________________________________________________________________
void JobThread::resetUserMap( void )
{
QMutexLocker lock( &mutex_ );
userMapInitialized_ = false;
userMap_.clear();
}
//________________________________________________________________________
void JobThread::run( void )
{
// initialize usermap
if( !userMapInitialized_ )
{
_readUserMap();
userMapInitialized_ = true;
}
// initialize total memory
if( !totalMemoryInitialized_ )
{
_readTotalMemory();
totalMemoryInitialized_ = true;
}
// prepare jobs
jobs_.clear();
// get list of jobs from /proc
QDir dir( "/proc" );
foreach( const QString& file, dir.entryList() )
{
bool ok( true );
const long id( file.toLong( &ok ) );
if( !ok ) continue;
// create job
Job job( id );
// read everything
if( !job.readFromStatus() ) continue;
if( !job.readFromStatM() ) continue;
if( !job.readFromStat() ) continue;
// update elapsed time
job.setElapsedTime( timer_.elapsed() );
// assign user name
UserMap::const_iterator iter = userMap_.find( job.userId() );
job.setUser( iter == userMap_.end() ? QString( tr( "Unknown (%1)" ) ).arg( job.userId() ):iter.value() );
// assign memory
if( totalMemory_ > 0 )
job.setMemory( 100.0*job.residentMemory()/totalMemory_ );
// insert in list
jobs_.insert( job );
}
}
//________________________________________________________________________
void JobThread::_readUserMap( void )
{
QFile file( "/etc/passwd" );
if( !file.open(QIODevice::ReadOnly) ) return;
// regular expression to read users
QRegExp regExp( "(.+):.:(\\d+)" );
QTextStream in(&file);
while( !in.atEnd() )
{
QStringList values = in.readLine().split( ":" );
if( values.size() > 3 ) userMap_.insert( values[2].toLongLong(), values[0] );
}
return;
}
//________________________________________________________________________
void JobThread::_readTotalMemory( void )
{
#ifdef _SC_PHYS_PAGES
totalMemory_ = ((qint64) sysconf(_SC_PHYS_PAGES)) * (sysconf(_SC_PAGESIZE)/1024);
#else
//This is backup code in case this is not defined.
QFile file( "/proc/meminfo" );
if( !file.open(QIODevice::ReadOnly) ) return;
QString buffer( file.readAll() );
while( !buffer.atEnd() )
{
const QString line( buffer.readLine() );
if( line.startsWith( "MemTotal:" ) )
{
const QStringList values( line.split( QRegExp( "\\s+" ), QString::SkipEmptyParts ) );
if( values.size() >= 2 ) totalMemory_ = values[1].toLongLong();
break;
}
}
#endif
}
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