Do not expose any file sharing if ${PUBLIC} is not set.

quickemu

@@ -587,7 +587,7 @@ function vm_boot() {
       echo " - SPICE:    Enabled"
     else
       echo -n " - SPICE:    On host:  spicy --title \"${VMNAME}\" --port ${SPICE_PORT}"
-      if [ "${guest_os}" != "macos" ]; then
+      if [ "${guest_os}" != "macos" ] && [ -n "${PUBLIC}"]; then
         echo -n " --spice-shared-dir ${PUBLIC}"
       fi
       echo "${FULLSPICY}"
@@ -595,11 +595,11 @@ function vm_boot() {
     fi
 
     # Reference: https://gitlab.gnome.org/GNOME/phodav/-/issues/5
-    if [ "${guest_os}" != "macos" ]; then
+    if [ "${guest_os}" != "macos" ] && [ -n "${PUBLIC}"]; then
       echo " - WebDAV:   On guest: dav://localhost:9843/"
     fi
 
-    if [ "${guest_os}" != "windows" ]; then
+    if [ "${guest_os}" != "windows" ] && [ -n "${PUBLIC}"]; then
       echo -n " - 9P:       On guest: "
       if [ "${guest_os}" == "linux" ]; then
         echo "sudo mount -t 9p -o trans=virtio,version=9p2000.L,msize=104857600 ${PUBLIC_TAG} ~/Public"
@@ -607,7 +607,7 @@ function vm_boot() {
         # PUBLICSHARE needs to be world writeable for seamless integration with
         # macOS. Test if it is world writeable, and prompt what to do if not.
         echo "sudo mount_9p ${PUBLIC_TAG}"
-        if [ -n "${PUBLIC}" ] && [ "${PUBLIC_PERMS}" != "drwxrwxrwx" ]; then
+        if [ "${PUBLIC_PERMS}" != "drwxrwxrwx" ]; then
           echo " - 9P:       On host:  chmod 777 ${PUBLIC}"
           echo "             Required for macOS integration 👆"
         fi
@@ -714,7 +714,7 @@ function vm_boot() {
 
   # https://wiki.qemu.org/Documentation/9psetup
   # https://askubuntu.com/questions/772784/9p-libvirt-qemu-share-modes
-  if [ "${guest_os}" != "windows" ]; then
+  if [ "${guest_os}" != "windows" ] && [ -n "${PUBLIC}"]; then
       # shellcheck disable=SC2054
       args+=(-fsdev local,id=fsdev0,path="${PUBLIC}",security_model=mapped-xattr
              -device virtio-9p-pci,fsdev=fsdev0,mount_tag="${PUBLIC_TAG}")
@@ -748,7 +748,11 @@ function vm_boot() {
 
   # If output is 'none' then SPICE was requested.
   if [ ${OUTPUT} == "none" ]; then
-    spicy --title "${VMNAME}" --port "${SPICE_PORT}" --spice-shared-dir "${PUBLIC}" "${FULLSPICY}" >/dev/null 2>&1 &
+    if [ -n "${PUBLIC}"]; then
+      spicy --title "${VMNAME}" --port "${SPICE_PORT}" --spice-shared-dir "${PUBLIC}" "${FULLSPICY}" >/dev/null 2>&1 &
+    else
+      spicy --title "${VMNAME}" --port "${SPICE_PORT}" "${FULLSPICY}" >/dev/null 2>&1 &
+    fi
   fi
 }
 
@@ -830,8 +834,7 @@ readonly DISK_MIN_SIZE=$((197632 * 8))
 readonly VERSION="2.2.3"
 
 # PUBLICSHARE is the only directory exposed to guest VMs for file
-# sharing via 9P and spice-webdavd. This path is not configurable.
-PUBLIC=""
+# sharing via 9P, spice-webdavd and Samba. This path is not configurable.
 if command -v xdg-user-dir &>/dev/null; then
   PUBLIC=$(xdg-user-dir PUBLICSHARE)
   if [ "${PUBLIC%/}" != ${HOME} ]; then