Minor: add comment

directory under mount path.

ATBUpdateTool.ini

@@ -4,6 +4,9 @@ repository-url="https://git.mimbach49.de/GerhardHoffmann"
 [DIRECTORIES]
 plugin-directory="/usr/lib/"
 working-directory="/opt/app/tools/atbupdate/"
+psa-config-directory="etc/psa_config/"
+psa-tariff-directory="etc/psa_tariff/"
+
 
 [PLUGINS]
 plugin-name="libCAslave.so"

DownloadDCJsonFiles/DownloadDCJsonFiles.pro

@@ -90,7 +90,8 @@ HEADERS += \
         ../common/include/System.h
 
 OTHER_FILES += \
-    ATBDownloadDCJsonFiles.ini
+    ATBDownloadDCJsonFiles.ini \
+    ../ATBUpdateTool.ini
 
 
 ##########################################################################################

DownloadDCJsonFiles/main.cpp

@@ -15,6 +15,7 @@
 #include "commandline_parser.h"
 #include "utils.h"
 #include "update.h"
+#include "System.h"
 
 #include <DeviceController/interfaces.h>
 
@@ -68,6 +69,8 @@ int main(int argc, char **argv) {
     QString plugInDir = parser.plugInDir();
     QString plugInName = parser.plugInName();
     QString workingDir = parser.workingDir();
+    QString psaConfigDir = parser.psaConfigDir();
+    QString psaTariffDir = parser.psaTariffDir();
     QString iniFileName = parser.iniFileName();
     bool const dryRun = parser.dryRun();
     bool const noUpdatePsaHardware = parser.noUpdatePsaHardware();
@@ -90,6 +93,8 @@ int main(int argc, char **argv) {
     qInfo() << "plugInDir ................" << plugInDir;
     qInfo() << "plugInName ..............." << plugInName;
     qInfo() << "workingDir ..............." << workingDir;
+    qInfo() << "psaConfigDir ............." << psaConfigDir;
+    qInfo() << "psaTariffDir ............." << psaTariffDir;
     qInfo() << "dryRun ..................." << dryRun;
     qInfo() << "noUpdatePsaHardware ......" << noUpdatePsaHardware;
     qInfo() << "alwaysDownloadConfig ....." << alwaysDownloadConfig;
@@ -108,28 +113,31 @@ int main(int argc, char **argv) {
         return 0;
     }
 
-    QString const customerRepo = QDir::cleanPath(workingDir + QDir::separator() + QString("customer_%1").arg(customerNr));
-
-    qCritical() << "Using customer repository" << customerRepo;
-
-    // always execute contents of opkg_commands-file
+    QString const &customerRepo = QDir::cleanPath(workingDir + QDir::separator() + QString("customer_%1").arg(customerNr));
     QStringList filesToUpdate;
 
-    QDir dir(QDir::cleanPath(customerRepo + QDir::separator() + "etc/psa_config"));
-
-    if (dir.exists()) {
-        QStringList jsons = dir.entryList(QStringList() << "DC2C*.json", QDir::Files);
-        if (!jsons.isEmpty()) {
-            for (QStringList::size_type i=0; i<jsons.size(); ++i) {
-                filesToUpdate << QDir::cleanPath(QString("etc/psa_config/") + jsons.at(i));
-            }
-        }
+    // etc/psa_config: located under mount-path
+    std::optional<QString> mountPath = System::checkForUSBStick(psaConfigDir);
+    if (mountPath.has_value()) {
+        filesToUpdate = System::getJsonFilesOnUsbStick(mountPath.value());
     } else {
-        qCritical() << "DIRECTORY" << dir << "DOES NOT EXIST";
-        return -1;
+        qCritical() << "Using customer repository" << customerRepo;
+
+        QDir dir(QDir::cleanPath(customerRepo + QDir::separator() + "etc/psa_config"));
+        if (dir.exists()) {
+            QStringList jsons = dir.entryList(QStringList() << "DC2C*.json", QDir::Files);
+            if (!jsons.isEmpty()) {
+                for (QStringList::size_type i=0; i<jsons.size(); ++i) {
+                    filesToUpdate << QDir::cleanPath(QString("etc/psa_config/") + jsons.at(i));
+                }
+            }
+        } else {
+            qCritical() << "DIRECTORY" << dir << "DOES NOT EXIST";
+            return -1;
+        }
     }
 
-    qCritical() << "JSON FILES TO UPDATE" << filesToUpdate;
+    // qCritical() << "JSON FILES TO UPDATE" << filesToUpdate;
 
     Update update(customerRepo,
                   QString::number(customerNr),
@@ -138,10 +146,13 @@ int main(int argc, char **argv) {
                   plugInName,
                   workingDir);
 
-    //update.checkJsonVersions();
-    update.doUpdate(filesToUpdate);
-    update.checkJsonVersions(filesToUpdate);
+    update.doUpdate(filesToUpdate, mountPath.has_value());
+    update.checkJsonVersions();
+    //update.checkJsonVersions(filesToUpdate);
+
+    if (mountPath.has_value()) {
+        System::umountUSBStick();
+    }
 
-    //return a.exec();
     return 0;
 }

DownloadDCJsonFiles/update.cpp

@@ -138,10 +138,11 @@ Update::~Update() {
     unloadDCPlugin();
 }
 
-bool Update::doUpdate(QStringList const &filesToWorkOn) {
+bool Update::doUpdate(QStringList const &filesToWorkOn, bool usbStickDetected) {
 
     if (!m_hw) {
-        qCritical() << "ERROR!!! m_hw == nullptr";
+        qCritical() << "(" << __func__ << ":" << __LINE__ << "):"
+                    << "ERROR!!! m_hw == nullptr";
         return false;
     }
 
@@ -149,10 +150,12 @@ bool Update::doUpdate(QStringList const &filesToWorkOn) {
     while ((m_sys_areDCdataValid = m_hw->sys_areDCdataValid()) == false) {
         // must deliver 'true', only then are all data from hwapi valid
         if (--tries < 0) {
-            qCritical() << "ERROR!!! DC DATA NOT VALID -> CA-SLAVE-PLUGIN NOT CONNECTED";
+            qCritical() << "(" << __func__ << ":" << __LINE__ << "):"
+                        << "ERROR!!! DC DATA NOT VALID -> CA-SLAVE-PLUGIN NOT CONNECTED";
             return false;
         }
-        qCritical() << "ERROR!!! DC DATA NOT VALID -> CA-SLAVE-PLUGIN NOT CONNECTED (" << tries << ")";
+        qCritical() << "(" << __func__ << ":" << __LINE__ << "):"
+                    << "ERROR!!! DC DATA NOT VALID -> CA-SLAVE-PLUGIN NOT CONNECTED (" << tries << ")";
         m_hw->dc_autoRequest(true);
         QThread::msleep(500);
     }
@@ -161,7 +164,8 @@ bool Update::doUpdate(QStringList const &filesToWorkOn) {
 
     QList<QString>::const_iterator it;
     for (it = filesToWorkOn.cbegin(); it != filesToWorkOn.cend(); ++it) {
-        QString const &fToWorkOn = QDir::cleanPath(m_customerRepository + QDir::separator() + it->trimmed());
+        QString const &fToWorkOn = usbStickDetected ? QDir::cleanPath(it->trimmed())
+            : QDir::cleanPath(m_customerRepository + QDir::separator() + it->trimmed());
         if (fToWorkOn.contains("DC2C_print", Qt::CaseInsensitive)
          && fToWorkOn.endsWith(".json", Qt::CaseInsensitive)) {
             res = true;
@@ -203,6 +207,25 @@ bool Update::doUpdate(QStringList const &filesToWorkOn) {
 }
 
 bool Update::checkJsonVersions(QStringList const& jsonFileNames) {
+    if (!m_hw) {
+        qCritical() << "(" << __func__ << ":" << __LINE__ << "):"
+                    << "ERROR!!! m_hw == nullptr";
+        return false;
+    }
+
+    int tries = 20;
+    while ((m_sys_areDCdataValid = m_hw->sys_areDCdataValid()) == false) {
+        // must deliver 'true', only then are all data from hwapi valid
+        if (--tries < 0) {
+            qCritical() << "(" << __func__ << ":" << __LINE__ << "):"
+                        << "ERROR!!! DC DATA NOT VALID -> CA-SLAVE-PLUGIN NOT CONNECTED";
+            return false;
+        }
+        qCritical() << "(" << __func__ << ":" << __LINE__ << "):"
+                    << "ERROR!!! DC DATA NOT VALID -> CA-SLAVE-PLUGIN NOT CONNECTED (" << tries << ")";
+        m_hw->dc_autoRequest(true);
+        QThread::msleep(500);
+    }
 
     for (QStringList::size_type i=0; i < jsonFileNames.size(); ++i) {
 
@@ -231,6 +254,7 @@ bool Update::checkJsonVersions(QStringList const& jsonFileNames) {
                 bool ok = false;
                 int n = captured.toInt(&ok);
                 if (ok) {
+                    // note: use 5 (instead of 4 -> index has been shifted)
                     jsonNr = n + 5;
                 }
             }

DownloadDCJsonFiles/update.h

@@ -58,7 +58,7 @@ public:
 
     virtual ~Update() override;
 
-    bool doUpdate(QStringList const &jsonFilesToDownload);
+    bool doUpdate(QStringList const &jsonFilesToDownload, bool usbStickDetected = false);
 
     bool updatePrinterTemplate(int templateIdx, QString fname) const;
     bool updateConfig(QString jsFileToSendToDC);

UpdatePTUDevCtrl/UpdatePTUDevCtrl.pro

@@ -123,7 +123,8 @@ DEFINES += QT_DEPRECATED_WARNINGS
 #           Check m_hw (pointer to CA-(Slave)Plugin) before its use.
 #           Only exit() if firmware is configured to be possibly updated, but
 #           loading the CA-plugin failed.
-VERSION="1.4.7"
+# 1.4.7   : Read Json-file versions of Json-files actually loaded into DC.
+VERSION="1.4.8"
 # PLANNED TODOS:
 #   1:  Das Repository wird repariert bwz. neu geklont. Unabhaengig vom WAIT.
 #   2:  Wenn der WAIT-Button aktiv ist, dann wird ein Repository repariert (neu

UpdatePTUDevCtrl/commandline_parser.cpp

@@ -60,6 +60,16 @@ CommandLineParser::CommandLineParser()
             QStringList() << "working-directory" << "working-directory",
             QCoreApplication::translate("main", "working directory of update-script."),
             QCoreApplication::translate("main", "directory")))
+  , m_psaConfigDirectoryOption(
+        QCommandLineOption(
+            QStringList() << "psa-config-directory" << "psa-config-directory",
+            QCoreApplication::translate("main", "config directory of json-files sent to dc."),
+            QCoreApplication::translate("main", "directory")))
+  , m_psaTariffDirectoryOption(
+        QCommandLineOption(
+            QStringList() << "psa-tariff-directory" << "psa-tariff-directory",
+            QCoreApplication::translate("main", "tariff directory of tariff-json-files."),
+            QCoreApplication::translate("main", "directory")))
   , m_dryRunOption(
         QCommandLineOption(
             QStringList() << "d" << "dry-run",
@@ -111,6 +121,12 @@ void CommandLineParser::configure() {
     m_workingDirectoryOption.setDefaultValue("/opt/app/tools/atbupdate/");
     m_parser.addOption(m_workingDirectoryOption);
 
+    m_psaConfigDirectoryOption.setDefaultValue("etc/psa_config/");
+    m_parser.addOption(m_psaConfigDirectoryOption);
+
+    m_psaTariffDirectoryOption.setDefaultValue("etc/psa_tariff/");
+    m_parser.addOption(m_psaTariffDirectoryOption);
+
     m_dryRunOption.setDefaultValue("false");
     m_parser.addOption(m_dryRunOption);
 
@@ -151,6 +167,12 @@ void CommandLineParser::readSettings() {
                 if (key.contains("working-directory")) {
                     m_workingDir = v.toString();
                 } else
+                if (key.contains("psa-config-directory")) {
+                    m_psaConfigDir = v.toString();
+                } else
+                if (key.contains("psa-tariff-directory")) {
+                    m_psaTariffDir = v.toString();
+                } else
                 if (key.contains("dry-run")) {
                     m_dryRun = (v.toBool() ? "true" : "false");
                 } else
@@ -207,6 +229,20 @@ QString CommandLineParser::plugInName() {
     return m_plugInName;
 }
 
+QString CommandLineParser::psaConfigDir() {
+    if (m_parser.isSet(m_psaConfigDirectoryOption)) {
+        m_psaConfigDir = m_parser.value(m_psaConfigDirectoryOption);
+    }
+    return m_psaConfigDir;
+}
+
+QString CommandLineParser::psaTariffDir() {
+    if (m_parser.isSet(m_psaTariffDirectoryOption)) {
+        m_psaTariffDir = m_parser.value(m_psaTariffDirectoryOption);
+    }
+    return m_psaTariffDir;
+}
+
 QString CommandLineParser::workingDir() {
     if (m_parser.isSet(m_workingDirectoryOption)) {
         m_workingDir = m_parser.value(m_workingDirectoryOption);

UpdatePTUDevCtrl/commandline_parser.h

@@ -11,6 +11,8 @@ class CommandLineParser : public QCommandLineParser {
     QString m_plugInDir;
     QString m_plugInName;
     QString m_workingDir;
+    QString m_psaConfigDir;
+    QString m_psaTariffDir;
     QString m_dryRun;
     QString m_noUpdatePsaHardware;
     QString m_showYoctoVersion;
@@ -29,6 +31,8 @@ class CommandLineParser : public QCommandLineParser {
     QCommandLineOption m_alwaysDownloadConfigOption;
     QCommandLineOption m_alwaysDownloadDCOption;
     QCommandLineOption m_workingDirectoryOption;
+    QCommandLineOption m_psaConfigDirectoryOption;
+    QCommandLineOption m_psaTariffDirectoryOption;
     QCommandLineOption m_dryRunOption;
     QCommandLineOption m_extendedVersionOption;
     QCommandLineOption m_yoctoVersionOption;
@@ -52,6 +56,8 @@ public:
     QString plugInDir();
     QString plugInName();
     QString workingDir();
+    QString psaConfigDir();
+    QString psaTariffDir();
     bool dryRun();
     bool noUpdatePsaHardware();
     bool yoctoVersion();

UpdatePTUDevCtrl/update.cpp

@@ -592,23 +592,31 @@ QStringList Update::getDcSoftAndHardWareVersion() {
 
 QString Update::getFileVersion(QString const& jsonFileName) {
     // "version":"15.10.2023 14:55 02.00.06",
-    static const QRegularExpression re("^.*(\\\"version\\\":)(.*)$");
+    static const QRegularExpression re("^.*(\\\"[Vv]ersion\\\":)([\\s\\\"]{0,})([^,\\\"]{0,}).*$");
 
-    QString fileVersion;
-    QFile inputFile(jsonFileName);
-    if (inputFile.open(QIODevice::ReadOnly)) {
-       QTextStream in(&inputFile);
-       while (!in.atEnd()) {
-          QString line = in.readLine();
+    QString fileVersion("");
+    QFile inputFile(QDir::cleanPath(m_customerRepository + QDir::separator() + jsonFileName));
 
-          QRegularExpressionMatch match;
-          int idx = line.indexOf(re, 0, &match);
-          if (idx != -1) {
-              fileVersion = match.captured(match.lastCapturedIndex());
-              break;
-          }
-       }
-       inputFile.close();
+    if (inputFile.exists()) {
+        if (inputFile.open(QIODevice::ReadOnly)) {
+           QTextStream in(&inputFile);
+           while (!in.atEnd()) {
+              QString line = in.readLine();
+
+              QRegularExpressionMatch match;
+              int idx = line.indexOf(re, 0, &match);
+              if (idx != -1) {
+                  int const lastCaptured = match.lastCapturedIndex();
+                  // the dc only sends 16 Byte
+                  fileVersion = match.captured(lastCaptured);
+                  fileVersion.truncate(16);
+                  break;
+              }
+           }
+           inputFile.close();
+        }
+    } else {
+        // qCritical() << "ERROR" << inputFile.fileName() << "does not exist";
     }
 
     return fileVersion;
@@ -619,58 +627,79 @@ bool Update::checkDownloadedJsonVersions(QStringList const& jsonFileNames) {
     for (QStringList::size_type i=0; i < jsonFileNames.size(); ++i) {
 
         uint8_t jsonNr = 0;
-        QFileInfo fInfo(jsonFileNames[i]);
 
-        if (fInfo.fileName().endsWith("conf.json")) {
+        QString const &fName = jsonFileNames[i];
+
+        // send one request for every single version
+        // jsonNr=1...36, 1=config file (cust.Nr) 2=devices  3=cash  4=res.
+        //      6=printer template 1 ..... 36= template 32
+
+        if (fName.endsWith("conf.json")) {
             jsonNr = 1;
         } else
-        if (fInfo.fileName().endsWith("device.json")) {
+        if (fName.endsWith("device.json")) {
             jsonNr = 2;
         } else
-        if (fInfo.fileName().endsWith("cash.json")) {
+        if (fName.endsWith("cash.json")) {
             jsonNr = 3;
         } else {
             QRegularExpressionMatch match;
             static const QRegularExpression re("^(.*print)([0-3][0-9])\\.json\\s*$");
-            int idx = fInfo.fileName().indexOf(re, 0, &match);
+            int idx = fName.indexOf(re, 0, &match);
             if (idx != -1) {
                 QString captured = match.captured(match.lastCapturedIndex());
                 bool ok = false;
                 int n = captured.toInt(&ok);
                 if (ok) {
-                    jsonNr = n + 4;
+                    // note: the '5' is correct
+                    jsonNr = n + 5;
                 }
             }
         }
 
         if (jsonNr != 0) {
-#if 0
+            // send one request for every single version
+            // jsonNr=1...36, 1=config file (cust.Nr) 2=devices  3=cash  4=res.
+            //      5=printer template 1 ..... 36= template 32
+
             m_hw->sys_requestJsonVersions(jsonNr);
             QThread::msleep(500);
 
             char buf[64];
             memset(buf, 0x00, sizeof(buf));
             m_hw->sys_getJsonVersions(jsonNr, buf);
-            buf[sizeof(buf)-1] = '\0';
+            buf[16] = '\0'; // the DC only handles 16 bytes
 
-            QString const installedVersion(buf);
+            static const QByteArray cb(16, (char)0xff);
+
+            QString const installedVersion(QString::fromStdString(buf));
             QString const fileVersion = getFileVersion(jsonFileNames[i]);
 
-            qCritical() << "installed version:" << installedVersion;
-            qCritical() << "     file version:" << fileVersion;
+            QFileInfo fi(jsonFileNames[i]);
+
+            qCritical() << endl;
+            qCritical() << "                json request nr:" << jsonNr;
 
             if (installedVersion == fileVersion) {
-
+                qCritical() << "                      json file:" << fi.fileName();
+                qCritical() << "        installed version in DC:" << installedVersion;
+            } else
+            if (cb == QByteArray(buf) && fileVersion == "") {
+                qCritical() << "unknown json file (repo and DC):" << fi.fileName();
+            } else {
+                qCritical() << "                      json file:" << fi.fileName();
+                qCritical() << "        installed version in DC:" << installedVersion;
+                qCritical() << "     file version in repository:" << fileVersion;
             }
-#endif
 
         } else {
-            qCritical() << "CANNOT FIND JSON-NR FOR" << jsonFileNames[i];
+            qCritical() << "CANNOT FIND JSON-NR FOR" << fName;
         }
     }
 
     return false;
 }
+
 bool Update::doUpdate(int &displayIndex, QStringList const &filesToWorkOn) {
 
     if (!m_hw) {

UpdatePTUDevCtrl/worker.cpp

@@ -869,6 +869,7 @@ bool Worker::execOpkgCommands() {
                         QStringList opkgErrorLst;
                         while (!in.atEnd()) {
                             QString line = in.readLine();
+                            // TODO: "^\\s*[#]{0,}$" : empty line or comment line starting with #
                             static const QRegularExpression comment("^\\s*#.*$");
                             if (line.indexOf(comment, 0) == -1) {
                                 // found opkg command

common/include/System.h

@@ -3,6 +3,10 @@
 
 
 #include <QObject>
+#include <QStringList>
+
+#include <optional>
+#include <initializer_list>
 
 class System : public QObject
 {
@@ -13,16 +17,17 @@ private:
 
     static QString errorMsg;
 
-
 public:
 
+    static const QStringList allowedJsonFiles;
 
     static bool checkForSDCard();
     static bool umountSDCard();
 
-    static bool checkForUSBStick();
-    static QString getUSBMountPath();
-    static QString getUSBDeviceName();
+    static std::optional<QString> checkForUSBStick(QString const &dirPathUnderMountPath = ".");
+    static QString getUSBMountPath(QString const &dirPathUnderMountPath = ".");
+
+    //static QString getUSBDeviceName();
     static bool umountUSBStick();
 
     static bool test_mount(const QString& dev, const QString &mountpoint);
@@ -48,7 +53,7 @@ public:
     static QString getPTU4SerialNumber();
     static QString getPTU4MACAddress();
 
-
+    static QStringList getJsonFilesOnUsbStick(QString const &mountPath);
 
 };
 

common/src/System.cpp

@@ -7,10 +7,52 @@
 #include <QRegExp>
 #include <QStringList>
 #include <QDebug>
+#include <QDirIterator>
 
 //#include "version.h"
 
 
+
+
+const QStringList System::allowedJsonFiles =
+std::initializer_list<QString>{
+    QString("DC2C_conf.json"),
+    QString("DC2C_cash.json"),
+    QString("DC2C_device.json"),
+    QString("DC2C_print01.json"),
+    QString("DC2C_print02.json"),
+    QString("DC2C_print03.json"),
+    QString("DC2C_print04.json"),
+    QString("DC2C_print05.json"),
+    QString("DC2C_print06.json"),
+    QString("DC2C_print07.json"),
+    QString("DC2C_print08.json"),
+    QString("DC2C_print09.json"),
+    QString("DC2C_print10.json"),
+    QString("DC2C_print11.json"),
+    QString("DC2C_print12.json"),
+    QString("DC2C_print13.json"),
+    QString("DC2C_print14.json"),
+    QString("DC2C_print15.json"),
+    QString("DC2C_print16.json"),
+    QString("DC2C_print17.json"),
+    QString("DC2C_print18.json"),
+    QString("DC2C_print19.json"),
+    QString("DC2C_print20.json"),
+    QString("DC2C_print21.json"),
+    QString("DC2C_print22.json"),
+    QString("DC2C_print23.json"),
+    QString("DC2C_print24.json"),
+    QString("DC2C_print25.json"),
+    QString("DC2C_print26.json"),
+    QString("DC2C_print27.json"),
+    QString("DC2C_print28.json"),
+    QString("DC2C_print29.json"),
+    QString("DC2C_print30.json"),
+    QString("DC2C_print31.json"),
+    QString("DC2C_print32.json")
+};
+
 QString System::errorMsg = "";
 
 System::System(QObject *parent) :
@@ -209,8 +251,7 @@ bool System::test_dir(const QString& dir)
 
 
 
-bool System::checkForUSBStick()
-{
+std::optional<QString> System::checkForUSBStick(QString const &dirPathUnderMountPath) {
 #if defined (ARCH_DesktopLinux)
     // DEBUG / TEST:
     if (QFileInfo(getUSBMountPath()).isDir())
@@ -219,11 +260,9 @@ bool System::checkForUSBStick()
         return false;
 #endif
 
-    if (getUSBMountPath().isEmpty()) {
-        return false;
-    }
-
-    return true;
+    QString const &mountPath = getUSBMountPath(dirPathUnderMountPath);
+    // qCritical() << "MOUNT-PATH" << mountPath;
+    return mountPath.isEmpty() ? std::nullopt : std::optional<QString>(mountPath);
 }
 
 
@@ -235,8 +274,7 @@ bool System::checkForUSBStick()
  * Note, do not return an empty string ("") here because a calling method (which could not be
  * identified till now) is relying on this!
  */
-QString System::getUSBMountPath()
-{
+QString System::getUSBMountPath(QString const &dirPathUnderMountPath) {
 
 #if defined (ARCH_DesktopLinux)
     // DEBUG / TEST:
@@ -277,8 +315,13 @@ QString System::getUSBMountPath()
 
                 mountLine = line.split(' ');
                 if (mountLine.size() > 3) {
-                    qDebug() << "System::getUSBMountPath(): " << mountLine.at(0) << " is mounted on " << mountLine.at(2);
-                    return mountLine.at(2);
+                    qCritical() << "System::getUSBMountPath(): " << mountLine.at(0) << " is mounted on " << mountLine.at(2);
+                    QDir d(QDir::cleanPath(mountLine.at(2) + QDir::separator() + dirPathUnderMountPath));
+                    if (d.exists()) {
+                        return mountLine.at(2);
+                    } else {
+                        qCritical() << "directory" << d.absolutePath() << "does not exist";
+                    }
                 }
             }
         }
@@ -289,6 +332,27 @@ QString System::getUSBMountPath()
     return "";
 }
 
+QStringList System::getJsonFilesOnUsbStick(QString const &mountPath) {
+    QStringList jsonFiles;
+
+    // /media/sda2/etc/psa_config
+    QString const &dirPath = QDir::cleanPath(mountPath + QDir::separator() + "etc" + QDir::separator() + "psa_config");
+    QDir d(dirPath);
+    if (d.exists()) {
+        QDirIterator it(dirPath, QStringList() << "*.json", QDir::Files, QDirIterator::NoIteratorFlags);
+        while (it.hasNext()) {
+            QString const &jsonFile = it.next();
+            QFileInfo fi(jsonFile);
+            if (System::allowedJsonFiles.contains(fi.fileName())) {
+                jsonFiles << jsonFile;
+            } else {
+                qCritical() << "Warning:" << fi.fileName() << "unknown";
+            }
+        }
+    }
+
+    return jsonFiles;
+}
 
 /********************************************************************************
  * static function to check if a mounted sd-card is writable.