kde-workspace/libs/ksysguard/lsofui/lsof.cpp

#include <QString>
#include <QProcess>
#include <klocale.h>

#include "lsof.h"

struct KLsofWidgetPrivate
{
    qlonglong pid;
    QProcess *process;
};

KLsofWidget::KLsofWidget(QWidget *parent)
    : QTreeWidget(parent), d(new KLsofWidgetPrivate())
{
    d->pid = -1;
    setColumnCount(3);
    setUniformRowHeights(true);
    setRootIsDecorated(false);
    setItemsExpandable(false);
    setSortingEnabled(true);
    setAllColumnsShowFocus(true);
    setHeaderLabels(QStringList() << i18nc("Short for File Descriptor", "FD") << i18n("Type") << i18n("Object"));
    d->process = new QProcess(this);
    connect(d->process, SIGNAL(finished(int,QProcess::ExitStatus)), this, SLOT(finished(int,QProcess::ExitStatus)));
}

KLsofWidget::~KLsofWidget()
{
    delete d;
}

qlonglong KLsofWidget::pid() const
{
    return d->pid;
}

void KLsofWidget::setPid(qlonglong pid)
{
    d->pid = pid;
    update();
}

bool KLsofWidget::update()
{
    clear();
    QStringList args;
    d->process->waitForFinished();
    args << "-Fftn";
    if (d->pid > 0) {
        args << ("-p" + QString::number(d->pid));
    }
    d->process->start("lsof", args);
    return true;
}

void KLsofWidget::finished(int exitCode, QProcess::ExitStatus exitStatus) 
{
    Q_UNUSED(exitCode);
    Q_UNUSED(exitStatus);

    char buf[1024];
    QTreeWidgetItem *process = NULL;
    while (true) {
        ::memset(buf, '\0', sizeof(buf) * sizeof(char));
        qint64 lineLength = d->process->readLine(buf, sizeof(buf));

        if (lineLength <= 0) {
            break;
        }
        if (buf[lineLength-1] == '\n') {
            lineLength--;
        }

        switch(buf[0]) {
            /* Process related stuff */
            case 'f': {
                process = new QTreeWidgetItem(this);
                process->setText(0,QString::fromUtf8(buf+1, lineLength - 1));
                break;
            }
            case 't': {
                if (process)
                    process->setText(1,QString::fromUtf8(buf+1, lineLength - 1));
                break;
            }
            case 'n': {
                if (process)
                    process->setText(2,QString::fromUtf8(buf+1, lineLength - 1));
                break;
            }
            default: {
                break;
            }
        }
    }
}

#include "moc_lsof.cpp"