Use lsblk to detect devices.

src/plugins/libparted/helpers/org.kde.kpmcore.scan.actions

@@ -1,9 +1,3 @@
-[org.kde.kpmcore.scan.scandevices]
-Name=Scan devices action
-Description=Scan available devices
-Policy=yes
-Persistence=session
-
 [org.kde.kpmcore.scan.scandevice]
 Name=Scan device action
 Description=Scan device

src/plugins/libparted/helpers/scan.cpp

@@ -19,35 +19,6 @@
 #include "core/partitiontable.h"
 #include "plugins/libparted/pedflags.h"
 
-ActionReply Scan::scandevices(const QVariantMap& args)
-{
-    ActionReply reply;
-
-    ped_device_probe_all();
-    PedDevice* pedDevice = nullptr;
-    QList<QVariant> paths;
-    bool excludeReadOnly = args[QLatin1String("excludeReadOnly")].toBool();
-
-    while (true) {
-        pedDevice = ped_device_get_next(pedDevice);
-        if (!pedDevice)
-            break;
-        if (pedDevice->type == PED_DEVICE_DM)
-            continue;
-        if (excludeReadOnly && (
-                pedDevice->type == PED_DEVICE_LOOP ||
-                pedDevice->read_only))
-            continue;
-
-        paths.append(QString::fromUtf8(pedDevice->path));
-    }
-
-    QVariantMap returnArgs;
-    returnArgs[QLatin1String("paths")] = paths;
-    reply.setData(returnArgs);
-    return reply;
-}
-
 ActionReply Scan::scandevice(const QVariantMap& args)
 {
     ActionReply reply;

src/plugins/libparted/helpers/scan.h

@@ -29,7 +29,6 @@ class Scan : public QObject
     Q_OBJECT
 
 public Q_SLOTS:
-    ActionReply scandevices(const QVariantMap& args);
     ActionReply scandevice(const QVariantMap& args);
     ActionReply readsectorsused(const QVariantMap& args);
 };

src/plugins/libparted/libpartedbackend.cpp

@@ -38,6 +38,7 @@
 #include "fs/luks.h"
 
 #include "util/globallog.h"
+#include "util/externalcommand.h"
 #include "util/helpers.h"
 
 #include <blkid/blkid.h>
@@ -310,26 +311,21 @@ Device* LibPartedBackend::scanDevice(const QString& deviceNode)
 QList<Device*> LibPartedBackend::scanDevices(bool excludeReadOnly)
 {
     QList<Device*> result;
-    QVariantMap args;
-    args[QLatin1String("excludeReadOnly")] = excludeReadOnly;
 
-    KAuth::Action scanAction = QStringLiteral("org.kde.kpmcore.scan.scandevices");
-    scanAction.setHelperId(QStringLiteral("org.kde.kpmcore.scan"));
-    scanAction.setArguments(args);
-    KAuth::ExecuteJob *job = scanAction.execute();
-    if (!job->exec()) {
-        qWarning() << "KAuth returned an error code: " << job->errorString();
-        return result;
-    }
-    QList<QVariant> paths = job->data()[QLatin1String("paths")].toList();
-
-    quint32 totalDevices = paths.size();
-    for (quint32 i = 0; i < totalDevices; ++i) {
-        QString path = paths[i].toString();
-        emitScanProgress(path, i * 100 / totalDevices);
-        Device* d = scanDevice(path);
-        if (d)
-            result.append(d);
+    ExternalCommand cmd(QStringLiteral("lsblk"), {
+                          QStringLiteral("--nodeps"),
+                          QStringLiteral("--noheadings"),
+                          QStringLiteral("--output"), QString::fromLatin1("name"),
+                          QStringLiteral("--paths"),
+                          QStringLiteral("--include"), excludeReadOnly ? QStringLiteral("3,8") : QStringLiteral("3,7,8") });
+    if (cmd.run(-1) && cmd.exitCode() == 0) {
+        QStringList devices = cmd.output().split(QString::fromLatin1("\n"));
+        devices.removeLast();
+        quint32 totalDevices = devices.length();
+        for (quint32 i = 0; i < totalDevices; ++i) {
+            emitScanProgress(devices[i], i * 100 / totalDevices);
+            result.append(scanDevice(devices[i]));
+        }
     }
 
     return result;