read more than one certificate from a file; take file names in command line arguments

src/certman.hxx

@@ -35,21 +35,21 @@ class CertMan: public QMainWindow, protected Ui::CertMan {
               SLOT(certificate(QUrl, QSslCertificate)));
     }
     bool open(const QString& fileName) {
-      bool status(true);
+      bool status(false);
       QFile file(fileName);
       file.open(QIODevice::ReadOnly);
-      while (!file.atEnd()) {
-        QSslCertificate c(&file);
-        if (!c.isNull()) {
+      if (file.error()!=QFileDevice::NoError) {
+        qDebug()<<"Error open file"<<fileName<<file.errorString();
+        return false;
+      }
+      for (const QSslCertificate& c: QSslCertificate::fromDevice(&file)) {
         Certificate* win(new Certificate(_mdi));
-          _mdi->addSubWindow(win)->setWindowTitle(QFileInfo(fileName).fileName());
+        _mdi->addSubWindow(win)->setWindowTitle
+          (c.subjectInfo(QSslCertificate::CommonName).join(", ")
+           +" ("+QFileInfo(fileName).fileName()+")");
         win->show();
         win->certificate(c);
-        } else {
-          status = false;
-          qDebug()<<QObject::trUtf8("Cannot read PEM certificate from file: %1")
-            .arg(fileName);
-        }
+        status = true;
       }
       file.close();
       return status;