GUACAMOLE-374: Support absolutely all properties and extensions.

guacamole-docker/entrypoint.d/500-generate-tomcat-catalina-base.sh

@@ -0,0 +1,50 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+##
+## 500-generate-tomcat-catalina-base.sh
+##
+## Automcatically generates a fresh, temporary CATALINA_BASE for Apache Tomcat.
+## This allows Tomcat to run as a reduced-privilege user, and allows its
+## configuration to be dynamically generated by the container entrypoint at
+## startup.
+##
+
+#
+# Start with a fresh CATALINA_BASE
+#
+
+rm -rf /tmp/catalina-base.*
+export CATALINA_BASE="`mktemp -p /tmp -d catalina-base.XXXXXXXXXX`"
+
+# User-only writable CATALINA_BASE
+for dir in logs temp webapps work; do
+    mkdir -p $CATALINA_BASE/$dir
+done
+cp -R /usr/local/tomcat/conf $CATALINA_BASE
+
+cat >> "$CATALINA_BASE/conf/catalina.properties" <<EOF
+
+# Point Guacamole at automatically-generated, temporary GUACAMOLE_HOME
+guacamole.home=$GUACAMOLE_HOME
+EOF
+
+# Install webapp
+ln -sf /opt/guacamole/webapp/guacamole.war $CATALINA_BASE/webapps/${WEBAPP_CONTEXT:-guacamole}.war
+