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/*
 * This file is part of the KDE project, module kdesu.
 * Copyright (C) 1999,2000 Geert Jansen <jansen@kde.org>
 *
 * This is free software; you can use this library under the GNU Library
 * General Public License, version 2. See the file "COPYING.LIB" for the
 * exact licensing terms.
 */

#ifndef KDESUSTUB_H
#define KDESUSTUB_H

#include "ptyprocess.h"

#include <kdesu/kdesu_export.h>

#include <QtCore/QByteRef>
#include <QtCore/QList>

namespace KDESu
{

namespace KDESuPrivate
{
class KCookie;
}

/** \class StubProcess stubprocess.h KDESu/StubProcess
 * Chat with kdesu_stub.
 *
 * StubProcess extends PtyProcess with functionality to chat with kdesu_stub.
 */

class KDESU_EXPORT StubProcess: public PtyProcess
{
public:
    /**
     * Different schedulers. SchedNormal is the normal Unix timesharing
     * scheduler, while SchedRealtime is a POSIX.1b realtime scheduler.
     */
    enum Scheduler {
        SchedNormal,
        SchedRealtime
    };

    StubProcess();
    ~StubProcess();

    /**
     * Set the command.
     */
    void setCommand(const QByteArray &command);

    /**
     * Set the target user.
     */
    void setUser(const QByteArray &user);

    /**
     * Set to "X only mode": Sycoca is not built and kdeinit is not launched.
     */
    void setXOnly(bool xonly);

    /**
     * Set the priority of the process. The priority value must be between 0
     * and 100, 0 being the lowest priority. This value is mapped to the
     * scheduler and system dependent priority range of the OS.
     */
    void setPriority(int prio);

    /**
     * Set the scheduler type.
     */
    void setScheduler(int sched);

protected:
    void virtual_hook(int id, void *data) Q_DECL_OVERRIDE;

    /**
     * Exchange all parameters with kdesu_stub.
     */
    int converseStub(int check);

    /**
     * This virtual function can be overloaded when special behavior is
     * desired. By default, it returns the value returned by KCookie.
     */
    virtual QByteArray display();

    /**
     * See display.
     */
    virtual QByteArray displayAuth();

    bool m_XOnly;
    int m_priority;
    int m_scheduler;
    QByteArray m_command;
    QByteArray m_user;
    KDESuPrivate::KCookie *m_cookie;

private:
    QByteArray commaSeparatedList(const QList<QByteArray> &lst);
    void writeString(const QByteArray &str);

    class StubProcessPrivate;
    StubProcessPrivate *const d;
};

}

#endif // KDESUSTUB_H