diff --git a/src/lib/CMakeLists.txt b/src/lib/CMakeLists.txt
--- a/src/lib/CMakeLists.txt
+++ b/src/lib/CMakeLists.txt
@@ -92,6 +92,7 @@
     util/kosrelease.cpp
     util/kprocesslist.cpp
     util/kshell.cpp
+    util/blockingapp.cpp
     ${kcoreaddons_OPTIONAL_SRCS}
     ${kcoreaddons_QM_LOADER}
 )
diff --git a/src/lib/util/blockingapp.h b/src/lib/util/blockingapp.h
new file mode 100644
--- /dev/null
+++ b/src/lib/util/blockingapp.h
@@ -0,0 +1,40 @@
+/*  This file is part of the KDE Frameworks
+ *
+ *  Copyright (C) 2019 Méven Car <meven.car@kdemail.net>
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License version 2 as published by the Free Software Foundation;
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public License
+ *  along with this library; see the file COPYING.LIB.  If not, write to
+ *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA 02110-1301, USA.
+ */
+
+#ifndef BLOCKINGAPP_H
+#define BLOCKINGAPP_H
+
+#include <QObject>
+#include <QString>
+#include "kcoreaddons_export.h"
+
+class QString;
+
+class KCOREADDONS_EXPORT BlockingApp: public QObject
+{
+    Q_OBJECT
+
+public:
+    void queryBlockingApps(const QString &fileName);
+
+Q_SIGNALS:
+    void blockingAppsReady(const QStringList &apps);
+};
+
+#endif // BLOCKINGAPP_H
diff --git a/src/lib/util/blockingapp.cpp b/src/lib/util/blockingapp.cpp
new file mode 100644
--- /dev/null
+++ b/src/lib/util/blockingapp.cpp
@@ -0,0 +1,72 @@
+/*  This file is part of the KDE Frameworks
+ *
+ *  Copyright (C) 2019 Méven Car <meven.car@kdemail.net>
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License version 2 as published by the Free Software Foundation;
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public License
+ *  along with this library; see the file COPYING.LIB.  If not, write to
+ *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA 02110-1301, USA.
+ */
+
+#include "blockingapp.h"
+
+#include <QString>
+#include <QProcess>
+#include <QStringList>
+#include <QRegularExpression>
+
+#include "kprocesslist.h"
+
+void BlockingApp::queryBlockingApps(const QString &devicePath)
+{
+    QProcess *p = new QProcess;
+
+    connect(p, static_cast<void (QProcess::*)(QProcess::ProcessError)>(&QProcess::error), [=](QProcess::ProcessError) {
+        emit blockingAppsReady({});
+        p->deleteLater();
+    });
+
+    connect(p, static_cast<void (QProcess::*)(int,QProcess::ExitStatus)>(&QProcess::finished), [=](int /* exitCode */,
+            QProcess::ExitStatus /* status*/) {
+        QStringList blockApps;
+
+        const QString out = QString::fromStdString(p->readAll().toStdString());
+        const QStringList &pidList = out.split(QRegularExpression(QStringLiteral("\\s+")), QString::SkipEmptyParts);
+
+        const KProcessList::KProcessInfoList procs = KProcessList::processInfoList();
+
+        QString processName;
+        for (const QString &pidStr : pidList) {
+            int pid = pidStr.toInt();
+            if (!pid) {
+                continue;
+            }
+            for (const KProcessList::KProcessInfo &proc : procs) {
+                if (proc.pid() == pid) {
+                    processName = proc.name();
+                    break;
+                }
+            }
+            if (!blockApps.contains(processName)) {
+                blockApps << processName;
+            }
+        }
+        blockApps.removeDuplicates();
+        emit blockingAppsReady(blockApps);
+        p->deleteLater();
+    });
+    p->start(QStringLiteral("lsof"), {QStringLiteral("-t"), devicePath});
+    //    p.start(QStringLiteral("fuser"), {QStringLiteral("-m"), devicePath});
+}
+
+
+#include "moc_blockingapp.cpp"
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -11,3 +11,6 @@
 
 add_executable(faceicontest faceicontest.cpp)
 target_link_libraries(faceicontest Qt5::Widgets KF5::CoreAddons)
+
+add_executable(testBlockingApps testblockingapp.cpp)
+target_link_libraries(testBlockingApps Qt5::Widgets KF5::CoreAddons)
diff --git a/tests/testblockingapp.cpp b/tests/testblockingapp.cpp
new file mode 100644
--- /dev/null
+++ b/tests/testblockingapp.cpp
@@ -0,0 +1,40 @@
+/*
+ *  Copyright (C) 2019 Méven Car <meven.car@kdemail.net>
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License version 2 as published by the Free Software Foundation;
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public License
+ *  along with this library; see the file COPYING.LIB.  If not, write to
+ *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA 02110-1301, USA.
+ */
+
+#include <QApplication>
+#include <QObject>
+#include <blockingapp.h>
+#include <QDebug>
+
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+
+    BlockingApp *blocking = new BlockingApp();
+
+    const QObject *test = new QObject();
+    test->connect(blocking, &BlockingApp::blockingAppsReady, test, [=](const QStringList &apps) {
+        qDebug() << apps;
+    });
+
+    // insert a filename open by tail -f for instance to test
+    QString fileName = "/home/meven/test-file";
+    blocking->queryBlockingApps(fileName);
+
+    return app.exec();
+}