docker-pdns/pdns-recursor/docker-entrypoint.sh

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#!/bin/sh
set -euo pipefail
# Configure base vars
: "${PDNS_local_port:=53}"
: "${PDNS_local_address:=0.0.0.0}"
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: "${PDNS_allow_from:=0.0.0.0/0}"
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export PDNS_local_port PDNS_local_address PDNS_allow_from
if [ -f /etc/fedora-release ]; then
config_file=/etc/pdns-recursor/recursor.conf
pdns_user=pdns-recursor
elif [ -f /etc/alpine-release ]; then
config_file=/etc/pdns/recursor.conf
pdns_user=recursor
fi
# Create config file from template
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envtpl < /recursor.conf.tpl > $config_file
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# Fix config file ownership
chown ${pdns_user}: $config_file
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exec "$@"