LinuxDevice: Implement shared ssh connection

Change-Id: I1897f0a468e477e0be61767d4bad0086d59fb075
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

src/plugins/remotelinux/sshprocessinterface.h

@@ -0,0 +1,70 @@
+/****************************************************************************
+**
+** Copyright (C) 2022 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "remotelinux_export.h"
+
+#include <utils/processinterface.h>
+
+namespace RemoteLinux {
+
+class LinuxDevice;
+class SshProcessInterfacePrivate;
+
+class REMOTELINUX_EXPORT SshProcessInterface : public Utils::ProcessInterface
+{
+    Q_OBJECT
+
+public:
+    SshProcessInterface(const LinuxDevice *linuxDevice);
+    ~SshProcessInterface();
+
+protected:
+    void emitStarted(qint64 processId);
+    // To be called from leaf destructor.
+    // Can't call it from SshProcessInterface destructor as it calls virtual method.
+    void killIfRunning();
+
+private:
+    virtual void handleStarted(qint64 processId);
+    virtual void handleReadyReadStandardOutput(const QByteArray &outputData);
+
+    virtual QString fullCommandLine(const Utils::CommandLine &commandLine) const = 0;
+    virtual QString pidArgumentForKill() const;
+
+    void start() final;
+    qint64 write(const QByteArray &data) final;
+    void sendControlSignal(Utils::ControlSignal controlSignal) final;
+
+    bool waitForStarted(int msecs) final;
+    bool waitForReadyRead(int msecs) final;
+    bool waitForFinished(int msecs) final;
+
+    friend class SshProcessInterfacePrivate;
+    SshProcessInterfacePrivate *d = nullptr;
+};
+
+} // namespace RemoteLinux