/**********************************************************************
** ProcessInfo
**
** Display process information
**
** Copyright (C) 2002, Dan Williams
**                    williamsdr@acm.org
**                    http://draknor.net
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
**********************************************************************/

#include <qheader.h>
#include <qlistview.h>
#include <qlayout.h>
#include <qtimer.h>
#include <qfile.h>
#include <qdir.h>

#include "processinfo.h"
#include "processdetail.h"

ProcessInfo::ProcessInfo( QWidget* parent,  const char* name, WFlags fl )
    : QWidget( parent, name, fl )
{
    QVBoxLayout *layout = new QVBoxLayout( this, 5 );

    ProcessView = new QListView( this, "ProcessView" );
    int colnum = ProcessView->addColumn( tr( "PID" ) );
    ProcessView->setColumnAlignment( colnum, Qt::AlignRight );
    colnum = ProcessView->addColumn( tr( "Command" ),96 );
    colnum = ProcessView->addColumn( tr( "Status" ) );
    colnum = ProcessView->addColumn( tr( "Time" ) );
    ProcessView->setColumnAlignment( colnum, Qt::AlignRight );
    ProcessView->setAllColumnsShowFocus( TRUE );
    connect( ProcessView, SIGNAL( doubleClicked(QListViewItem *) ), this, SLOT( viewProcess(QListViewItem *) ) );

    layout->addWidget( ProcessView );

    QTimer *t = new QTimer( this );
    connect( t, SIGNAL( timeout() ), this, SLOT( updateData() ) );
    t->start( 5000 );

    updateData();
}

ProcessInfo::~ProcessInfo()
{
}

void ProcessInfo::updateData()
{
    QString processnum("");
    QString processcmd("");
    QString processstatus("");
    QString processtime("");
    int pid, ppid, pgrp, session, tty, tpgid, utime, stime, cutime, cstime, counter, priority, starttime,
       signal, blocked, sigignore, sigcatch;
    uint flags, minflt, cminflt, majflt, cmajflt, timeout, itrealvalue, vsize, rss, rlim, startcode,
         endcode, startstack, kstkesp, kstkeip, wchan;
    char state;
    char comm[255];

    ProcessView->clear();

    QDir *procdir = new QDir("/proc");
    procdir->setFilter(QDir::Dirs);
    procdir->setSorting(QDir::Name);
    QFileInfoList *proclist = new QFileInfoList(*(procdir->entryInfoList()));
    if ( proclist )
    {
        QFileInfoListIterator it(*proclist);
        QFileInfo *f;
        while ( ( f = it.current() ) != 0 )
        {
            ++it;
            processnum = f->fileName();
            if ( processnum >= "0" && processnum <= "99999" )
            {
                FILE *procfile = fopen( ( QString ) ( "/proc/" + processnum + "/stat"), "r");

                if ( procfile )
                {
                    fscanf( procfile,
                           "%d %s %c %d %d %d %d %d %u %u %u %u %u %d %d %d %d %d %d %u %u %d %u %u %u %u %u %u %u %u %d %d %d %d %u",
                           &pid, comm, &state, &ppid, &pgrp, &session,&tty, &tpgid, &flags, &minflt, &cminflt,
                           &majflt, &cmajflt, &utime, &stime, &cutime, &cstime, &counter, &priority, &timeout,
                           &itrealvalue, &starttime, &vsize, &rss, &rlim, &startcode, &endcode, &startstack,
                           &kstkesp, &kstkeip, &signal, &blocked, &sigignore, &sigcatch, &wchan );
                    processnum = processnum.rightJustify( 5, ' ' );
                    processcmd = QString( comm ).replace( QRegExp( "(" ), "" );
                    processcmd = processcmd.replace( QRegExp( ")" ), "" );
                    processstatus = state;
                    processtime.setNum( ( utime + stime ) / 100 );
                    processtime = processtime.rightJustify( 9, ' ' );
                    fclose( procfile );

                    ( void ) new QListViewItem( ProcessView, processnum, processcmd, processstatus, processtime );
                }
            }
        }
    }

    delete proclist;
    delete procdir;
}

void ProcessInfo::viewProcess(QListViewItem *process)
{
    QString pid= process->text(0).stripWhiteSpace();
    QString command = process->text(1);
    ProcessDetail *processdtl = new ProcessDetail( this, 0, TRUE, 0);
    processdtl->setCaption( pid + " - " + command );
    processdtl->pid = pid.toUInt();
    processdtl->ProcessView->setTextFormat( RichText );
    FILE *statfile = fopen( ( QString ) ( "/proc/" + pid + "/status"), "r");
    if ( statfile )
    {
        char line[81];
        fgets( line, 81, statfile );
        processdtl->ProcessView->setText( line );
        while ( fgets( line, 81, statfile ) )
        {
            processdtl->ProcessView->append( line );
        }
        fclose( statfile );
    }

    processdtl->showMaximized();
}