Moved local dir to /opt/sys_config

Improved error logging and added function handling calls with log and return values
Improved check for matching sudo rule

client_software/0030_desktop/Firefox.desktop

@@ -0,0 +1,17 @@
+[Desktop Entry]
+Comment[de_DE]=
+Comment=
+Exec=/opt/sys_config/system_setup/mozilla_starter.sh firefox run
+GenericName[de_DE]=
+GenericName=
+Icon=firefox
+MimeType=
+Name[de_DE]=Firefox
+Name=Firefox
+Path=/opt/sys_config/system_setup
+StartupNotify=true
+Terminal=true
+TerminalOptions=
+Type=Application
+X-KDE-SubstituteUID=false
+X-KDE-Username=

client_software/0030_desktop/Thunderbird.desktop

@@ -0,0 +1,17 @@
+[Desktop Entry]
+Comment[de_DE]=
+Comment=
+Exec=/opt/sys_config/system_setup/mozilla_starter.sh thunderbird run
+GenericName[de_DE]=
+GenericName=
+Icon=thunderbird
+MimeType=
+Name[de_DE]=Thunderbird
+Name=Thunderbird
+Path=/opt/sys_config/system_setup
+StartupNotify=true
+Terminal=true
+TerminalOptions=
+Type=Application
+X-KDE-SubstituteUID=false
+X-KDE-Username=

client_software/0030_desktop/install.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env sh
+# SPDX-FileCopyrightText: Daniel Pätzold
+# SPDX-License-Identifier: AGPL-3.0-or-later
+#
+# Sofwareinstallation script for Nextcloud Talk.
+#
+
+#Check for root
+if [ "$EUID" -ne 0 ]; then
+    echo "Error: Script requires root. Please check if ${SCRIPTPATH}/${SCRIPTNAME} is in sudoers rules and if you are a member. And if executed via sudo."
+    exit 1
+fi
+
+cp -n *.desktop $SUDO_HOME/Schreibtisch
+chown $SUDO_USER:$SUDO_USER $SUDO_HOME/Schreibtisch/*.desktop