add gui to configure ssh

Author: lievenhey

src/CMakeLists.txt

@@ -50,6 +50,7 @@ set(hotspot_SRCS
     perfoutputwidgettext.cpp
     perfoutputwidgetkonsole.cpp
     costcontextmenu.cpp
+    ssh.cpp
 
     # ui files:
     mainwindow.ui

src/mainwindow.cpp

@@ -122,6 +122,8 @@ MainWindow::MainWindow(QWidget* parent)
         settings->setObjdump(m_settingsDialog->objdump());
     });
 
+    connect(m_settingsDialog, &QDialog::accepted, m_recordPage, &RecordPage::onRemoteDevicesChanged);
+
     connect(settings, &Settings::sysrootChanged, m_resultsPage, &ResultsPage::setSysroot);
     connect(settings, &Settings::appPathChanged, m_resultsPage, &ResultsPage::setAppPath);
     connect(settings, &Settings::objdumpChanged, m_resultsPage, &ResultsPage::setObjdump);
@@ -227,6 +229,9 @@ MainWindow::MainWindow(QWidget* parent)
         settings->setDebuginfodUrls(m_config->group("debuginfod").readEntry("urls", QStringList()));
         connect(Settings::instance(), &Settings::debuginfodUrlsChanged, this,
                 [this, settings] { m_config->group("debuginfod").writeEntry("urls", settings->debuginfodUrls()); });
+
+        const auto askpass = QStandardPaths::findExecutable(QLatin1String("ksshaskpass"));
+        settings->setSshaskpassPath(m_config->group("SSH").readEntry("sshaskpass", askpass));
     }
 
     auto* prettifySymbolsAction = ui->viewMenu->addAction(tr("Prettify Symbols"));

src/perfrecordssh.cpp

@@ -36,51 +36,29 @@
 #include <csignal>
 
 #include "hotspot-config.h"
-
-QString sshOutput(const QString& hostname, const QStringList& command)
-{
-    QProcess ssh;
-    ssh.setProgram(QStandardPaths::findExecutable(QLatin1String("ssh")));
-    const auto arguments = QStringList({hostname}) + command;
-    ssh.setArguments(arguments);
-    ssh.start();
-    ssh.waitForFinished();
-    return QString::fromUtf8(ssh.readAll());
-}
-
-int sshExitCode(const QString& hostname, const QStringList& command)
-{
-    QProcess ssh;
-    ssh.setProgram(QStandardPaths::findExecutable(QLatin1String("ssh")));
-    const auto arguments = QStringList({hostname}) + command;
-    ssh.setArguments(arguments);
-    ssh.start();
-    ssh.waitForFinished();
-    return ssh.exitCode();
-}
+#include "ssh.h"
 
 PerfRecordSSH::PerfRecordSSH(QObject* parent)
     : PerfRecord(parent)
 {
-    m_hostname = QStringLiteral("user@localhost");
 }
 
 PerfRecordSSH::~PerfRecordSSH() = default;
 
 void PerfRecordSSH::record(const QStringList& perfOptions, const QString& outputPath, bool /*elevatePrivileges*/,
                            const QString& exePath, const QStringList& exeOptions, const QString& workingDirectory)
 {
-    int exitCode = sshExitCode(m_hostname, {QLatin1String("test"), QLatin1String("-e"), exePath});
+    int exitCode = sshExitCode(m_deviceName, {QLatin1String("test"), QLatin1String("-e"), exePath});
     if (exitCode) {
         emit recordingFailed(tr("File '%1' does not exist.").arg(exePath));
     }
 
-    exitCode = sshExitCode(m_hostname, {QLatin1String("test"), QLatin1String("-f"), exePath});
+    exitCode = sshExitCode(m_deviceName, {QLatin1String("test"), QLatin1String("-f"), exePath});
     if (exitCode) {
         emit recordingFailed(tr("'%1' is not a file.").arg(exePath));
     }
 
-    exitCode = sshExitCode(m_hostname, {QLatin1String("test"), QLatin1String("-x"), exePath});
+    exitCode = sshExitCode(m_deviceName, {QLatin1String("test"), QLatin1String("-x"), exePath});
     if (exitCode) {
         emit recordingFailed(tr("File '%1' is not executable.").arg(exePath));
     }
@@ -130,32 +108,32 @@ void PerfRecordSSH::sendInput(const QByteArray& input)
 
 QString PerfRecordSSH::currentUsername()
 {
-    if (m_hostname.isEmpty())
+    if (m_deviceName.isEmpty())
         return {};
-    return sshOutput(m_hostname, {QLatin1String("echo"), QLatin1String("$USERNAME")}).simplified();
+    return sshOutput(m_deviceName, {QLatin1String("echo"), QLatin1String("$USERNAME")}).simplified();
 }
 
 bool PerfRecordSSH::canTrace(const QString& path)
 {
-    if (m_hostname.isEmpty())
+    if (m_deviceName.isEmpty())
         return false;
 
     // exit code == 0 -> true
-    bool isDir = sshExitCode(m_hostname, {QLatin1String("test"), QLatin1String("-d"), path}) == 0;
-    bool isReadable = sshExitCode(m_hostname, {QLatin1String("test"), QLatin1String("-r"), path}) == 0;
+    bool isDir = sshExitCode(m_deviceName, {QLatin1String("test"), QLatin1String("-d"), path}) == 0;
+    bool isReadable = sshExitCode(m_deviceName, {QLatin1String("test"), QLatin1String("-r"), path}) == 0;
 
     if (!isDir || !isReadable) {
         return false;
     }
 
     QString paranoid =
-        sshOutput(m_hostname, {QLatin1String("cat"), QLatin1String("/proc/sys/kernel/perf_event_paranoid")});
+        sshOutput(m_deviceName, {QLatin1String("cat"), QLatin1String("/proc/sys/kernel/perf_event_paranoid")});
     return paranoid.trimmed() == QLatin1String("-1");
 }
 
 bool PerfRecordSSH::canProfileOffCpu()
 {
-    if (m_hostname.isEmpty())
+    if (m_deviceName.isEmpty())
         return false;
     return canTrace(QStringLiteral("events/sched/sched_switch"));
 }
@@ -186,16 +164,16 @@ static QString perfBuildOptions(const QString& hostname)
 
 bool PerfRecordSSH::canSampleCpu()
 {
-    if (m_hostname.isEmpty())
+    if (m_deviceName.isEmpty())
         return false;
-    return perfRecordHelp(m_hostname).contains(QLatin1String("--sample-cpu"));
+    return perfRecordHelp(m_deviceName).contains(QLatin1String("--sample-cpu"));
 }
 
 bool PerfRecordSSH::canSwitchEvents()
 {
-    if (m_hostname.isEmpty())
+    if (m_deviceName.isEmpty())
         return false;
-    return perfRecordHelp(m_hostname).contains(QLatin1String("--switch-events"));
+    return perfRecordHelp(m_deviceName).contains(QLatin1String("--switch-events"));
 }
 
 bool PerfRecordSSH::canUseAio()
@@ -206,16 +184,16 @@ bool PerfRecordSSH::canUseAio()
 
 bool PerfRecordSSH::canCompress()
 {
-    if (m_hostname.isEmpty())
+    if (m_deviceName.isEmpty())
         return false;
-    return Zstd_FOUND && perfBuildOptions(m_hostname).contains(QLatin1String("zstd: [ on  ]"));
+    return Zstd_FOUND && perfBuildOptions(m_deviceName).contains(QLatin1String("zstd: [ on  ]"));
 }
 
 bool PerfRecordSSH::isPerfInstalled()
 {
-    if (m_hostname.isEmpty())
+    if (m_deviceName.isEmpty())
         return false;
-    return sshExitCode(m_hostname, {QLatin1String("perf")}) != 127;
+    return sshExitCode(m_deviceName, {QLatin1String("perf")}) != 127;
 }
 
 void PerfRecordSSH::startRecording(const QStringList& perfOptions, const QString& outputPath,
@@ -250,12 +228,13 @@ void PerfRecordSSH::startRecording(const QStringList& perfOptions, const QString
 
     m_recordProcess = new QProcess(this);
     m_recordProcess->setProgram(QStandardPaths::findExecutable(QLatin1String("ssh")));
-    m_recordProcess->setArguments({m_hostname, QLatin1String("perf ") + perfCommand.join(QLatin1Char(' '))});
+    const auto arguments =
+        assembleSSHArguments(m_deviceName, {QLatin1String("perf ") + perfCommand.join(QLatin1Char(' '))});
+    m_recordProcess->setArguments(arguments);
+    m_recordProcess->setProcessEnvironment(sshEnvironment());
     m_recordProcess->start();
     m_recordProcess->waitForStarted();
 
-    qDebug() << m_recordProcess->arguments().join(QLatin1Char(' '));
-
     emit recordingStarted(QLatin1String("perf"), perfCommand);
 
     connect(m_recordProcess, &QProcess::readyReadStandardOutput, this,

src/perfrecordssh.h

@@ -38,6 +38,11 @@ class PerfRecordSSH : public PerfRecord
     PerfRecordSSH(QObject* parent = nullptr);
     ~PerfRecordSSH();
 
+    void setDeviceName(const QString& device)
+    {
+        m_deviceName = device;
+    }
+
     void record(const QStringList& perfOptions, const QString& outputPath, bool elevatePrivileges,
                 const QString& exePath, const QStringList& exeOptions, const QString& workingDirectory) override;
     void record(const QStringList& perfOptions, const QString& outputPath, bool elevatePrivileges,
@@ -70,6 +75,6 @@ class PerfRecordSSH : public PerfRecord
 
     QProcess* m_recordProcess = nullptr;
     QFile* m_outputFile;
-    QString m_hostname;
+    QString m_deviceName;
     bool m_userTerminated = false;
 };

src/recordpage.cpp

@@ -407,20 +407,19 @@ RecordPage::RecordPage(QWidget* parent)
 
     perfRecordChanged();
 
-    ui->remoteTargetComboBox->addItem(QStringLiteral("localhost"));
-    ui->remoteTargetComboBox->addItem(QStringLiteral("remote test 1"));
+    const auto sshPath = QStandardPaths::findExecutable(QLatin1String("ssh"));
+    ui->remoteTargetGroup->setVisible(!sshPath.isEmpty());
+
+    onRemoteDevicesChanged();
 
     connect(ui->remoteTargetComboBox, qOverload<int>(&QComboBox::currentIndexChanged), this,
             [this, perfRecordChanged](int index) {
                 if (index == 0) {
                     m_perfRecord = new PerfRecord(this);
-                    qDebug() << "PerfRecord";
                 } else {
                     auto recordSsh = new PerfRecordSSH(this);
-                    // TODO: this
-                    // recordSsh->setHostname();
+                    recordSsh->setDeviceName(ui->remoteTargetComboBox->currentText());
                     m_perfRecord = recordSsh;
-                    qDebug() << "PerfRecordSSH";
                 }
                 perfRecordChanged();
             });
@@ -824,3 +823,17 @@ void RecordPage::updateOffCpuCheckboxState()
         ui->offCpuCheckBox->setChecked(config().readEntry(QStringLiteral("offCpuProfiling"), false));
     }
 }
+
+void RecordPage::onRemoteDevicesChanged()
+{
+    ui->remoteTargetComboBox->clear();
+    ui->remoteTargetComboBox->addItem(QStringLiteral("localhost"));
+
+    const auto deviceConfig = KSharedConfig::openConfig()->group("devices");
+    auto t = deviceConfig.groupList();
+    for (const auto& device : deviceConfig.groupList()) {
+        if (deviceConfig.hasGroup(device)) {
+            ui->remoteTargetComboBox->addItem(device);
+        }
+    }
+}

src/recordpage.h

@@ -54,6 +54,9 @@ class RecordPage : public QWidget
     void homeButtonClicked();
     void openFile(QString filePath);
 
+public slots:
+    void onRemoteDevicesChanged();
+
 private slots:
     void onApplicationNameChanged(const QString& filePath);
     void onStartRecordingButtonClicked(bool checked);

src/settings.cpp

@@ -132,3 +132,9 @@ void Settings::setCallgraphColors(const QColor& active, const QColor& inactive)
         emit callgraphChanged();
     }
 }
+
+void Settings::setSshaskpassPath(const QString& sshaskpath)
+{
+    m_sshaskpassPath = sshaskpath;
+    emit sshaskpassChanged(m_sshaskpassPath);
+}

src/settings.h

@@ -119,6 +119,11 @@ class Settings : public QObject
         return m_callgraphColor;
     }
 
+    QString sshaskpassPath() const
+    {
+        return m_sshaskpassPath;
+    }
+
 signals:
     void prettifySymbolsChanged(bool);
     void collapseTemplatesChanged(bool);
@@ -134,6 +139,7 @@ class Settings : public QObject
     void archChanged(const QString& arch);
     void objdumpChanged(const QString& objdump);
     void callgraphChanged();
+    void sshaskpassChanged(const QString& path);
 
 public slots:
     void setPrettifySymbols(bool prettifySymbols);
@@ -152,6 +158,7 @@ public slots:
     void setCallgraphParentDepth(int parent);
     void setCallgraphChildDepth(int child);
     void setCallgraphColors(const QColor& active, const QColor& inactive);
+    void setSshaskpassPath(const QString& sshaskpath);
 
 private:
     Settings() = default;
@@ -172,6 +179,7 @@ public slots:
     QString m_appPath;
     QString m_arch;
     QString m_objdump;
+    QString m_sshaskpassPath;
 
     int m_callgraphParentDepth = 3;
     int m_callgraphChildDepth = 2;