Unmount with umount -l

sysext

···
 
 . /etc/sysext.conf 2>/dev/null
 
+if [[ ! -d "${TMPDIR:-/tmp}/sysext" ]]; then
+    mkdir -p ${TMPDIR:-/tmp}/sysext
+fi
+
 get_extensions() {
     for path in ${EXTENSION_PATHS}; do
 	find "${path}" -name '*.ext'
···
     echo "lowerdir=${lowerdir},upperdir=${TMPDIR:-/tmp}/sysext/usr.upper"
 }
 
-if [[ ! -d "${TMPDIR:-/tmp}/sysext" ]]; then
-    mkdir -p ${TMPDIR:-/tmp}/sysext
-fi
-
 merge() {
     if [[ -n "${1}" ]]; then
 	exts=$(echo $(realpath "${1}") $(get_mounted_extensions) | tr ' ' '\n' | sort | uniq)
···
 	exts=$(echo ${found_exts} $(get_mounted_extensions) | tr ' ' '\n' | sort | uniq)
     fi
     mountopts="$(create_mount "${exts}")"
-    echo ${mountopts}
-    ${UMOUNTCMD:-umount} ${USRPATH:-/usr}
+    mkdir -p "${TMPDIR:-/tmp}/sysext/usr.work"
+    ${UMOUNTCMD:-umount} -l ${USRPATH:-/usr}
     ${MOUNTCMD:-mount} -t overlay overlay ${USRPATH:-/usr} -o ro,${mountopts},workdir="${TMPDIR:-/tmp}/sysext/usr.work"
 }
 
···
 	return 0
     fi
     if [[ ! -n "${1}" ]]; then
-	${UMOUNTCMD:-umount} ${USRPATH:-/usr}
+	${UMOUNTCMD:-umount} -l ${USRPATH:-/usr}
     else
 	exts=$(echo $(get_extensions) $(get_mounted_extensions) | tr ' ' '\n' | sort | uniq | grep -v "${1}")
-	echo "${exts}" >/dev/stderr
 	mountopts="$(create_mount "${exts}")"
-	echo ${mountopts}
-	${UMOUNTCMD:-umount} ${USRPATH:-/usr}
+	mkdir -p "${TMPDIR:-/tmp}/sysext/usr.work"
+	${UMOUNTCMD:-umount} -l ${USRPATH:-/usr}
 	${MOUNTCMD:-mount} -t overlay overlay ${USRPATH:-/usr} -o ro,${mountopts},workdir="${TMPDIR:-/tmp}/sysext/usr.work"
     fi
 }
···
 	get_extensions | xargs realpath -s
     else
 	echo "No overlay mounted at ${USRPATH:-/usr}"
+	echo ""
+	echo "Extensions that would be merged:"
+	get_extensions | xargs realpath -s
     fi
 }