419 lines
8.0 KiB
Bash
Executable File
419 lines
8.0 KiB
Bash
Executable File
#!/usr/bin/env bash
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# - Adds DKIM subdomain delegation for a given domain
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# -
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# - Return (Exit) Codes:
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# - success:
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# - 0: Slave zone added / Access check successfully
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# - 1: Slave zone already exists
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# -
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# - error:
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# - 15: Variable for DNS master Server not present
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# - 21: Adding Zone failed
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#- 99: Fatal error
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# -
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# - Example:
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# - bind_create_dkim_delegation.sh oopen.de
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script_name="$(basename $(realpath $0))"
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working_dir="$(dirname $(realpath $0))"
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base_conf_file="${working_dir}/conf/bind.conf"
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script_conf_file="${working_dir}/conf/${script_name%%.*}.conf"
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log_file="$(mktemp)"
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backup_date="$(date +%Y-%m-%d-%H%M)"
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# ----------
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# Setting Defaults
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# ----------
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DEFAULT_CONF_FILE_DIR="/etc/bind"
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DEFAULT_BIND_USER="bind"
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DEFAULT_BIND_GROUP="bind"
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DEFAULT_ZONE_FILE_SLAVE_DIR="/var/cache/bind"
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DEFAULT_ZONE_FILE_SUFFIX="zone"
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# **********
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# Don't make changes after this
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# **********
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# ----------
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# Base Function(s)
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# ----------
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usage() {
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[[ -n "$1" ]] && error "$1"
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[[ $verbose ]] && echo -e "
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\033[1mUsage:\033[m
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$(basename $0) [Options] <dkim-domain> | check
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\033[1mDescription\033[m
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\033[1mReturn (Exit) Codes\033[m
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success:
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0: Slave zone added / Access check successfully
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1: Slave zone already exists
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error:
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15: Variable for DNS master Server (DKIM_DNS_MASTER) not present
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21: Adding Zone failed
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23: Reload bind configuration failed
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99: Fatal error
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\033[1mOptions\033[m
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-h
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Prints this help.
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-M <DKIM DNS Master>
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Primary master for the new DKIM slave zone.
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-q
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Runs in silent mode.
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\033[1mFiles\033[m
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Basic Configuration file: $base_conf_file
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Script specific Configuration file: $script_conf_file
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\033[1mExample:\033[m
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Create Configuration for Slave DKIM zone _domainkey.oopen.de
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$(basename $0) oopen.de
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"
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clean_up 100
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}
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clean_up() {
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# Perform program exit housekeeping
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rm $log_file
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blank_line
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if [[ -n "$1" ]] ; then
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ret_val=$1
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else
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ret_val=99
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fi
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exit $ret_val
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}
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echononl(){
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if $verbose ; then
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echo X\\c > /tmp/shprompt$$
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if [ `wc -c /tmp/shprompt$$ | awk '{print $1}'` -eq 1 ]; then
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echo -e -n " $*\\c" 1>&2
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else
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echo -e -n " $*" 1>&2
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fi
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rm /tmp/shprompt$$
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fi
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}
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warn (){
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if $verbose ; then
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echo ""
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echo -e " [ \033[33m\033[1mWarning\033[m ]: $*"
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echo ""
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fi
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}
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info (){
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if $verbose ; then
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echo ""
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echo -e " [ \033[32m\033[1mInfo\033[m ]: $*"
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echo ""
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fi
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}
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error(){
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if $verbose ; then
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echo ""
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echo -e " [ \033[31m\033[1mFehler\033[m ]: $*"
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echo ""
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fi
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}
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echo_ok() {
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if $verbose ; then
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echo -e "\033[75G[ \033[32mok\033[m ]"
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fi
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}
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echo_failed(){
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if $verbose ; then
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echo -e "\033[75G[ \033[1;31mfailed\033[m ]"
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fi
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}
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echo_skipped() {
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if $verbose ; then
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echo -e "\033[75G[ \033[33m\033[1mskipped\033[m ]"
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fi
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}
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backup_dir () {
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dir_to_backup=$1
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echononl "Backup existing directory \"$dir_to_backup\" .."
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if [[ -d "$dir_to_backup" ]] ; then
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cp -a "$dir_to_backup" "${dir_to_backup}.$backup_date" > $log_file 2>&1
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if [[ $? -eq 0 ]]; then
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echo_ok
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else
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echo_failed
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error "Backup directory \"$dir_to_backup\" failed!"
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clean_up 99
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fi
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else
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echo_failed
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error "Directory \"$dir_to_backup\" not found. No Backup written!"
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clean_up 99
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fi
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}
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blank_line() {
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if $verbose ; then
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echo ""
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fi
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}
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trim() {
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local var="$*"
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var="${var#"${var%%[![:space:]]*}"}" # remove leading whitespace characters
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var="${var%"${var##*[![:space:]]}"}" # remove trailing whitespace characters
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echo -n "$var"
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}
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# ----------
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# - Jobhandling
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# ----------
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# - Run 'clean_up' for signals SIGHUP SIGINT SIGTERM
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# -
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trap clean_up SIGHUP SIGINT SIGTERM
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# ----------
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# - Some checks ..
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# ----------
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# - Running in a terminal?
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# -
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if [[ -t 1 ]] ; then
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verbose=true
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else
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verbose=false
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fi
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# -Is systemd supported on this system?
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# -
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systemd_supported=false
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systemd=$(which systemd)
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systemctl=$(which systemctl)
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if [[ -n "$systemd" ]] && [[ -n "$systemctl" ]] ; then
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systemd_supported=true
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fi
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# - Print help?
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# -
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if [[ "$(trim $*)" = " -h" ]] || [[ "$(trim $*)" = " --help" ]] ; then
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usage
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fi
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if [[ -z "$(which basename)" ]]; then
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fatal 'It seems "basename" is not installed, but needed!'
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fi
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if [[ -z "$(which realpath)" ]]; then
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fatal 'It seems "realpath" is not installed, but needed!'
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fi
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# ==========
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# - Begin Main Script
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# ==========
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# ----------
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# - Headline
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# ----------
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if $terminal ; then
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echo ""
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echo -e "\033[1m----------\033[m"
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echo -e "\033[32m\033[1mRunning script \033[m\033[1m$script_name\033[32m .. \033[m"
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echo -e "\033[1m----------\033[m"
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fi
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# ----------
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# - Read commandline parameter
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# ----------
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while getopts hM:q opt ; do
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case $opt in
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q) verbose=true
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;;
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h) usage
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;;
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M) DKIM_DNS_MASTER="$OPTARG"
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;;
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\?) usage
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;;
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*) ;;
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esac
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done
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if [[ "$1" = "check" ]]; then
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info "Script \033[1m$(basename $0)\033[m was successfully invoked, but its only a test."
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clean_up 0
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fi
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dkim_domain=$1
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# ----------
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# Read Configurations from $base_conf_file
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# ----------
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blank_line
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echononl "Loading default basic configurations from $(basename ${base_conf_file}).."
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if [[ ! -f "$base_conf_file" ]]; then
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echo_skipped
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else
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source "${base_conf_file}" > $log_file 2>&1
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if [[ $? -eq 0 ]]; then
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echo_ok
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else
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echo_failed
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fatal "$(cat $log_file)"
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fi
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fi
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echononl "Loading script specific configurations from $(basename ${script_conf_file}).."
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if [[ ! -f "$script_conf_file" ]]; then
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echo_skipped
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else
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source "${script_conf_file}" > $log_file 2>&1
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if [[ $? -eq 0 ]]; then
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echo_ok
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else
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echo_failed
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fatal "$(cat $log_file)"
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fi
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fi
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[[ -n "$CONF_FILE_DIR" ]] || CONF_FILE_DIR="$DEFAULT_CONF_FILE_DIR"
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[[ -n "$ZONES_DECLARATION_FILE" ]] || ZONES_DECLARATION_FILE="${CONF_FILE_DIR}/named.conf.local"
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[[ -n "$BIND_USER" ]] || BIND_USER="$DEFAULT_BIND_USER"
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[[ -n "$BIND_GROUP" ]] || BIND_GROUP="$DEFAULT_BIND_GROUP"
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[[ -n "$ZONE_FILE_SLAVE_DIR" ]] || ZONE_FILE_SLAVE_DIR="$DEFAULT_ZONE_FILE_SLAVE_DIR"
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[[ -n "$ZONE_FILE_SUFFIX" ]] || ZONE_FILE_SUFFIX="$DEFAULT_ZONE_FILE_SUFFIX"
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if [[ -z "$DKIM_DNS_MASTER" ]] ; then
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error "DNS master Server not present!"
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clean_up 15
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else
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IP_DNS_MASTER="$(dig +short $DKIM_DNS_MASTER)"
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# - Eliminate trailing '.' character(s)
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# -
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IP_DNS_MASTER="${IP_DNS_MASTER%"${IP_DNS_MASTER##*[!\.]}"}"
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fi
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if [[ -z "$ALLOW_TRANSFER_OPTION" ]] ; then
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ALLOW_TRANSFER_OPTION="$(dig +short $DKIM_DNS_MASTER)"
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# - Eliminate trailing '.' character(s)
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# -
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ALLOW_TRANSFER_OPTION="${ALLOW_TRANSFER_OPTION%"${ALLOW_TRANSFER_OPTION##*[!\.]}"}"
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fi
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zone=_domainkey.${dkim_domain}
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if $(grep -q -E "^\s*zone\s+\"$zone\"" $ZONES_DECLARATION_FILE 2>/dev/null) ; then
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info "Zone declaration for "$zone" already exists."
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clean_up 1
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fi
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# - Backup ZONES_DECLARATION_FILE
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# -
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echononl "Backup file '$ZONES_DECLARATION_FILE'.."
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cp -a "$ZONES_DECLARATION_FILE" "${ZONES_DECLARATION_FILE}.$backup_date" > $log_file 2>&1
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if [[ $? -eq 0 ]]; then
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echo_ok
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else
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echo_failed
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fatal "$(cat $log_file)"
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fi
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# - Add zone definition to ZONES_DECLARATION_FILE (/etc/bind/named.conf.local)
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# -
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echononl "Add zone definition to '$ZONES_DECLARATION_FILE' .."
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cat <<EOF >> $ZONES_DECLARATION_FILE 2> $log_file
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zone "$zone" {
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type slave;
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file "${ZONE_FILE_SLAVE_DIR}/${zone}.${ZONE_FILE_SUFFIX}";
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//allow-query { any; };
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allow-transfer { $ALLOW_TRANSFER_OPTION; };
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masters {
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$IP_DNS_MASTER;
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};
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};
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EOF
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if [[ $? -eq 0 ]]; then
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echo_ok
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else
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echo_failed
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error "$(cat $log_file)"
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clean_up 20
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fi
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# - (re)Load Bind base configuration
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# -
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echononl "Reload bind configuration.."
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rndc reconfig > $log_file 2>&1
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if [[ $? -eq 0 ]]; then
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echo_ok
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else
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echo_failed
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error "$(cat $log_file)"
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clean_up 23
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fi
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blank_line
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clean_up 0
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