Erste Version

removable.cpp

@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Dany Thinnes
+
+#include "removable.h"
+
+#include <QDir>
+#include <QFile>
+#include <QFileInfo>
+#include <QStorageInfo>
+#include <QStringList>
+
+namespace {
+
+QString readSys(const QString &path)
+{
+    QFile f(path);
+    if (!f.open(QIODevice::ReadOnly))
+        return QString();
+    return QString::fromUtf8(f.readAll()).trimmed();
+}
+
+bool isSystemMount(const QString &mp)
+{
+    static const QStringList sys = { "/", "/boot", "/home", "/usr", "/var", "/etc" };
+    for (const QString &s : sys) {
+        if (mp == s)
+            return true;
+    }
+    return false;
+}
+
+} // namespace
+
+// Heuristik: Als auswerfbar gilt ein Datentraeger, wenn
+//  - das Kernel-Flag "removable" gesetzt ist, oder
+//  - es eine SD-Karte am eingebauten Kartenleser ist (mmcblk, Typ "SD"), oder
+//  - er ueber USB angeschlossen ist.
+// Systemverzeichnisse (/, /home, ...) werden nie angeboten.
+RemovableInfo detectRemovable(const QString &file)
+{
+    RemovableInfo info;
+
+    const QStorageInfo si(QFileInfo(file).absolutePath());
+    if (!si.isValid() || !si.isReady())
+        return info;
+
+    const QString dev = QFileInfo(QString::fromUtf8(si.device())).canonicalFilePath();
+    const QString mp = si.rootPath();
+    if (!dev.startsWith(QLatin1String("/dev/")) || isSystemMount(mp))
+        return info;
+
+    const QString name = QFileInfo(dev).fileName();
+    const QString sysPart = QFileInfo(QStringLiteral("/sys/class/block/") + name).canonicalFilePath();
+    if (sysPart.isEmpty())
+        return info;
+
+    // Zugehoerige Platte bestimmen (bei Partitionen das Elternverzeichnis in /sys)
+    QString disk = name;
+    if (QFileInfo::exists(sysPart + QStringLiteral("/partition")))
+        disk = QFileInfo(sysPart).dir().dirName();
+
+    const QString diskSys = QFileInfo(QStringLiteral("/sys/class/block/") + disk).canonicalFilePath();
+    const bool rm = readSys(QStringLiteral("/sys/class/block/%1/removable").arg(disk)) == QLatin1String("1");
+    const bool sd = disk.startsWith(QLatin1String("mmcblk"))
+        && readSys(QStringLiteral("/sys/class/block/%1/device/type").arg(disk)) == QLatin1String("SD");
+    const bool usb = diskSys.contains(QLatin1String("/usb"));
+
+    info.removable = rm || sd || usb;
+    info.partition = dev;
+    info.disk = QStringLiteral("/dev/") + disk;
+    info.mountPoint = mp;
+    info.label = si.name();
+    return info;
+}