fix(stirling-pdf): remove the LibreOffice listener that collides with unoserver on UNO port 2002 (#16460)

libreoffice-listener.service binds 127.0.0.1:2002, and unoserver — started
with no --uno-port — defaults to the same port and launches its own
LibreOffice. The second soffice.bin cannot bind and spins in its URP Acceptor
thread indefinitely, burning a full core from boot.

It stays invisible because unoserver's client side dials 127.0.0.1:2002 and
reaches the listener's instance, so conversions succeed and systemctl --failed
stays empty.

unoserver supervises its own LibreOffice, so the separate listener is
redundant; port 2002 is still served after the change. Both
Requires=libreoffice-listener lines are dropped with it, and update_script()
migrates existing installs, which all still carry the collision.

ct/stirling-pdf.sh

@@ -43,8 +43,20 @@ function update_script() {
     find /usr/lib -name "libicudata.so.*" -exec patchelf --clear-execstack {} \; || true
     msg_ok "Patched Native Libraries"
 
+    if [[ -f /etc/systemd/system/libreoffice-listener.service ]]; then
+      msg_info "Removing Conflicting LibreOffice Listener"
+      systemctl disable -q --now libreoffice-listener
+      rm -f /etc/systemd/system/libreoffice-listener.service
+      sed -i '/^Requires=libreoffice-listener.service$/d' /etc/systemd/system/stirlingpdf.service /etc/systemd/system/unoserver.service
+      sed -i 's/^After=syslog.target network.target libreoffice-listener.service$/After=syslog.target network.target unoserver.service/' /etc/systemd/system/stirlingpdf.service
+      sed -i 's/^After=libreoffice-listener.service$/After=network.target/' /etc/systemd/system/unoserver.service
+      systemctl daemon-reload
+      systemctl reset-failed libreoffice-listener.service 2>/dev/null || true
+      msg_ok "Removed Conflicting LibreOffice Listener"
+    fi
+
     msg_info "Stopping Services"
-    systemctl stop stirlingpdf libreoffice-listener unoserver
+    systemctl stop stirlingpdf unoserver
     msg_ok "Stopped Services"
 
     if [[ -f ~/.Stirling-PDF-login ]]; then
@@ -59,7 +71,7 @@ function update_script() {
     msg_ok "Font Cache Updated"
 
     msg_info "Starting Services"
-    systemctl start stirlingpdf libreoffice-listener unoserver
+    systemctl start unoserver stirlingpdf
     msg_ok "Started Services"
     msg_ok "Updated successfully!"
   fi

install/stirling-pdf-install.sh

@@ -132,27 +132,12 @@ $STD fc-cache -fv
 msg_ok "Font Cache Updated"
 
 msg_info "Creating Service"
-cat <<EOF >/etc/systemd/system/libreoffice-listener.service
-[Unit]
-Description=LibreOffice Headless Listener Service
-After=network.target
-
-[Service]
-Type=simple
-User=root
-Group=root
-ExecStart=/usr/lib/libreoffice/program/soffice --headless --invisible --nodefault --nofirststartwizard --nolockcheck --nologo --accept="socket,host=127.0.0.1,port=2002;urp;StarOffice.ComponentContext"
-Restart=always
-
-[Install]
-WantedBy=multi-user.target
-EOF
-
+# unoserver starts and supervises its own LibreOffice on UNO port 2002, so a separate
+# listener on that port only collides with it. Do not reintroduce one.
 cat <<EOF >/etc/systemd/system/stirlingpdf.service
 [Unit]
 Description=Stirling-PDF service
-After=syslog.target network.target libreoffice-listener.service
-Requires=libreoffice-listener.service
+After=syslog.target network.target unoserver.service
 
 [Service]
 SuccessExitStatus=143
@@ -173,8 +158,7 @@ EOF
 cat <<EOF >/etc/systemd/system/unoserver.service
 [Unit]
 Description=UnoServer RPC Interface
-After=libreoffice-listener.service
-Requires=libreoffice-listener.service
+After=network.target
 
 [Service]
 Type=simple
@@ -186,9 +170,8 @@ EnvironmentFile=/opt/Stirling-PDF/.env
 WantedBy=multi-user.target
 EOF
 
-systemctl enable -q --now libreoffice-listener
-systemctl enable -q --now stirlingpdf
 systemctl enable -q --now unoserver
+systemctl enable -q --now stirlingpdf
 msg_ok "Created Service"
 
 motd_ssh