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112 lines
4.1 KiB
Bash
112 lines
4.1 KiB
Bash
#
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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#
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##
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## @fn 010-generate-guacamole-home.sh
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##
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## Automatically generates a temporary, skeleton GUACAMOLE_HOME to be used for
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## this run of the container. GUACAMOLE_HOMEs from previous runs are
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## automatically deleted prior to creating the new skeleton. A
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## randomly-generated temporary directory is used instead of a standard
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## directory like "/etc/guacamole" to allow users to use "/etc/guacamole" as a
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## basis for their own configuration.
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##
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##
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## The directory to copy/link over as a basis for the GUACAMOLE_HOME actually
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## used by the Guacamole web application. Any configuration generated by this
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## container will be overlaid on top of this configuration. To achieve the
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## overlay, symbolic links will be created for all files inside and beneath
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## this directory. Only the guacamole.properties file will be copied instead of
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## using symbolic links (to ensure property generation performed by the
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## container does not potentially modify an external file).
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##
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GUACAMOLE_HOME_TEMPLATE="$GUACAMOLE_HOME"
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##
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## Tests whether a given property is set within the guacamole.properties file
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## in GUACAMOLE_HOME.
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##
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## @param PROPERTY_NAME
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## The name of the property to check.
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##
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## @returns
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## Zero if the given property is set to any value within
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## guacamole.properties, non-zero otherwise.
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##
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is_property_set() {
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local PROPERTY_NAME="$1"
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grep "^[[:space:]]*$PROPERTY_NAME\>" "$GUACAMOLE_HOME/guacamole.properties" &> /dev/null
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}
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#
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# Start with a fresh GUACAMOLE_HOME
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#
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rm -rf /tmp/guacamole-home.*
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GUACAMOLE_HOME="`mktemp -p /tmp -d guacamole-home.XXXXXXXXXX`"
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mkdir -p "$GUACAMOLE_HOME/"{lib,extensions}
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cat > "$GUACAMOLE_HOME/guacamole.properties" <<EOF
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# guacamole.properties - generated `date`
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EOF
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#
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# Copy contents of provided GUACAMOLE_HOME template, if any
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#
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if [ -e "$GUACAMOLE_HOME_TEMPLATE" ]; then
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# Create links for any libraries provided in the template GUACAMOLE_HOME
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find "$GUACAMOLE_HOME_TEMPLATE/lib" -mindepth 1 -maxdepth 1 \
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-exec ln -sv "{}" "$GUACAMOLE_HOME/lib/" ";"
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# Create links for any extensions provided in the template GUACAMOLE_HOME
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find "$GUACAMOLE_HOME_TEMPLATE/extensions" -mindepth 1 -maxdepth 1 \
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-exec ln -sv "{}" "$GUACAMOLE_HOME/extensions/" ";"
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# Create links for all other files directly within the template
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# GUACAMOLE_HOME
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find "$GUACAMOLE_HOME_TEMPLATE" -mindepth 1 -maxdepth 1 \
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-name guacamole.properties -o -name lib -o -name extensions -prune \
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-o -exec ln -sv "{}" "$GUACAMOLE_HOME/" ";"
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# Add any properties provided within template GUACAMOLE_HOME
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if [ -e "$GUACAMOLE_HOME_TEMPLATE/guacamole.properties" ]; then
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cat "$GUACAMOLE_HOME_TEMPLATE/guacamole.properties" >> "$GUACAMOLE_HOME/guacamole.properties"
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fi
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fi
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# Enable reading of properties directly from environment variables unless
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# overridden
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if ! is_property_set "enable-environment-properties"; then
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cat >> "$GUACAMOLE_HOME/guacamole.properties" <<'EOF'
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#
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# NOTE: The following was automatically added by the container entrypoint to
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# allow all Guacamole configuration properties to be automatically read from
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# environment variables. If this is not desired, you can override this behavior
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# by specifying the "enable-environment-properties" variable yourself in your
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# own guacamole.properties file.
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#
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enable-environment-properties: true
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EOF
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fi
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