294 lines
6.2 KiB
Bash
Executable File
294 lines
6.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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working_dir="$(dirname $(realpath $0))"
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conf_file="${working_dir}/conf/bind.conf"
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log_file="$(mktemp)"
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#---------------------------------------
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#-----------------------------
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# Setting Defaults
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#-----------------------------
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#---------------------------------------
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DEFAULT_CONF_FILE_DIR="/etc/bind"
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#---------------------------------------
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#-----------------------------
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# Base Function(s)
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#-----------------------------
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#---------------------------------------
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usage() {
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echo
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[ -n "$1" ] && echo -e "Error: $1\n"
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cat<<EOF
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Usage: $(basename $0) [Options] <full-qualified-hostname>
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Script checks if a given hostname is supported by this nameserver. The concerning
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zone will be printed out.
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If running in a terminal and not in silent mode (-q), the output is clearly
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arranged in a human readable way.
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If not running in a terminal or silent mode (-q) is set, only the name of the
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zonefile will be printed out or an empty string, if the given hostname is
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not supported by this nameservice.
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Parameter "check" can be used, to test whether this script is accessable (e.g. from a
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further script on a remote host). Nothing will be done, scripts returns '0'.
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Return (Exit) Codes:
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success:
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0: hostname is supported
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error:
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10: Invalid hostname/domain given
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11: the given hostname is not supported by this nameserver
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12: given hostname is supported, but this nameserver is not the master of
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the concerning zone
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99: Fatal error
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Options:
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-h
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Prints this help.
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-q
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Runs in silent mode.
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EOF
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clean_up 1
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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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exit $1
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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 "\t[ \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 "\t[ \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 "\t[ \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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trap clean_up SIGHUP SIGINT SIGTERM
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# - Test whether stdout (file descriptor 1) is a terminal or not (e.g. cron
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# - or if you pipe the output to some other program)
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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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while getopts hq opt ; do
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case $opt in
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q) verbose=false
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;;
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h) usage
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;;
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*)
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;;
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esac
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done
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shift $(expr $OPTIND - 1)
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if [[ $# -ne 1 ]] ; then
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if $verbose ; then
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usage "wrong number of arguments"
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else
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clean_up 99
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fi
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fi
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# - Parameter "check" can be used, to test whether this script
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# - is accessable (e.g. from a script on a remote host)
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# -
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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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hostname=$1
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$verbose && echo ""
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if [[ -z "$hostname" ]] ; then
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error "No hostname/domain given!"
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clean_up 99
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fi
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#---------------------------------------
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#-----------------------------
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# Load default values from bind.conf
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#
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# Overwrites the settings above
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#
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#-----------------------------
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#---------------------------------------
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if $verbose ; then
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clear
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echo ""
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echo -e "\033[32mRunning script \033[1m"$(basename $0)"\033[m .."
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echo ""
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fi
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info "Given hostname: \033[1m${hostname}\033[m"
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echononl "\t Loading default Configuration values from $(basename ${conf_file}).."
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if [[ ! -f "$conf_file" ]]; then
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echo_skipped
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else
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source "${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="${CONF_FILE_DIR}/named.conf.local"
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$verbose && echo ""
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# - Validate Syntax of given domain
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# -
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valid_domain_regex="^([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])(\.([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]{0,61}[a-zA-Z0-9]))*$"
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echononl "\t Validate syntax of given hostname/domain.."
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if [[ $hostname =~ $valid_domain_regex ]]; then
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if [[ ! $hostname =~ \. ]]; then
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echo_failed
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error "Invalid hostname/domain given!"
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clean_up 10
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else
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echo_ok
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fi
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else
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echo_failed
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error "Invalid hostname/domain given!"
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clean_up 10
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fi
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# - Is hostname supported by this nameserver?
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# -
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_failed=false
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zone=$hostname
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_zone=$(echo ${zone//\./\\.})
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while ! grep -E "^\s*zone\s+\"?$_zone" $ZONES_DECLARATION_FILE > /dev/null 2>&1 ; do
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zone=${zone#*.}
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_zone=$(echo ${zone//\./\\.})
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if [[ ! $_zone =~ \. ]]; then
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_failed=true
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break
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fi
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done
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if $_failed ; then
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$verbose && error "hostname \"$hostname\" not supported by this nameserver!"
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clean_up 11
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fi
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# - Is this nameserver also the master?
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# -
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_found=false
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_found_zonefile=false
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_is_master=false
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zone_file=""
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regex_zone="^[[:space:]]*zone[[:space:]]+\"?$(echo ${zone//\./\\.})\""
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regex_file="^[[:space:]]*file"
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regex_master="type[[:space:]]+master"
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while IFS='' read -r line || [[ -n "$line" ]] ; do
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if [[ $line =~ $regex_zone ]]; then
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_found=true
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fi
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if $_found ; then
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if [[ $line =~ $regex_master ]]; then
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_is_master=true
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fi
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if [[ "$line" =~ ^[[:space:]]*\}[[:space:]]*\; ]]; then
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break
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fi
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fi
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done < $ZONES_DECLARATION_FILE
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if $_is_master ; then
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if $verbose ; then
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info "Hosted Zone: \033[1m${zone}\033[m"
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else
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echo "$zone"
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fi
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else
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$verbose && error "hostname \"$hostname\" is supported but this nameserver is not the master!"
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clean_up 12
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fi
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$verbose && echo ""
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clean_up 0
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