read dc-verion directly from binary file

DownloadDCFirmware/update.cpp

@@ -1,4 +1,5 @@
 #include "update.h"
+#include "process/command.h"
 
 #include <QCoreApplication>
 #include <QFile>
@@ -21,6 +22,8 @@
 #include <QDateTime>
 #include <QPluginLoader>
 #include <QMap>
+#include <QStringList>
+#include <QString>
 
 #define UPDATE_OPKG                 (1)
 #define UPDATE_DC                   (0)
@@ -92,6 +95,20 @@ bool Update::unloadDCPlugin() {
     return false;
 }
 
+QString Update::dcVersion(QString const &dcBinFile) {
+    Command c("bash");
+    QStringList param;
+
+    param << "-c" << QString(R"(strings %1 | grep DC2c.\[0-9\] | uniq)").arg(dcBinFile);
+
+    if (c.execute("/tmp", param)) {
+        return c.getCommandResult().trimmed().split(QRegularExpression("\\s")).first();
+        // qInfo() << "(" << __func__ << ":" << __LINE__ << ")" << v;
+    }
+
+    return "";
+}
+
 class hwapi;
 Update::Update(QString customerRepository,
                QString customerNrStr,