- Add Configuration file support for 'bind_get_domain_by_hostname.sh'.

bind_get_domain_by_hostname.sh

@@ -1,19 +1,52 @@
 #!/usr/bin/env bash
 
-# - Bind configuration file containing zone definitions
+working_dir="$(dirname $(realpath $0))"
-# -
+conf_file="${working_dir}/conf/bind.conf"
-ZONE_CONF_FILE=/etc/bind/named.conf.local
 
-## --
+log_file="$(mktemp)"
-## -- End: Variable definitions
 
-## ***
+#---------------------------------------
-## *** Don't make changes after this line ***
+#-----------------------------
-## ***
+# Base Function(s)
+#-----------------------------
+#---------------------------------------
+
+usage() {
+   echo 
+      [ -n  "$1" ] && echo -e "Error: $1\n"
+
+      cat<<EOF
+
+   Usage: $(basename $0) [Options] <full-qualified-hostname>
+
+      Script checks if a given hostname is supported by this nameserver. Hostname can
+      alos be a TLD name.
+
+      As result the Script returns the zone (domain) of the given hostname." In silent
+      mode (-q), script returns an empty String, if the given hostname is not
+      supported by this nameserver.
+
+      Options:
+
+      -h    
+            Prints this help.
+
+      -q
+            Runs in silent mode.
+
+EOF
+clean_up 1
+}
+
+clean_up() {
+
+   # Perform program exit housekeeping
+   rm $log_file
+   exit $1
+}
 
-## --- some functions
-## ---
 echononl(){
+   if $verbose ; then
       echo X\\c > /tmp/shprompt$$
       if [ `wc -c /tmp/shprompt$$ | awk '{print $1}'` -eq 1 ]; then
          echo -e -n "$*\\c" 1>&2
@@ -21,41 +54,49 @@ echononl(){
          echo -e -n "$*" 1>&2
       fi
       rm /tmp/shprompt$$
+   fi
 }
 
 warn (){
+   if $verbose ; then
       echo ""
       echo -e "\t[ \033[33m\033[1mWarning\033[m ]: $*"
       echo ""
+   fi
 }
 
 info (){
+   if $verbose ; then
       echo ""
       echo -e "\t[ \033[32m\033[1mInfo\033[m ]: $*"
       echo ""
+   fi
 }
 
 error(){
+   if $verbose ; then
       echo ""
       echo -e "\t[ \033[31m\033[1mFehler\033[m ]: $*"
       echo ""
+   fi
 }
 
 echo_ok() {
+   if $verbose ; then
       echo -e "\033[75G[ \033[32mok\033[m ]"
+   fi
 }
 echo_failed(){
+   if $verbose ; then
       echo -e "\033[75G[ \033[1;31mfailed\033[m ]"
+   fi
 }
 echo_skipped() {
+   if $verbose ; then
       echo -e "\033[75G[ \033[33m\033[1mskipped\033[m ]"
+   fi
 }
 
-## ---
-## --- END: functions
-
-hostname=$1
-
 # - Test whether stdout (file descriptor 1) is a terminal or not (e.g. cron
 # - or if you pipe the output to some other program)
 #
@@ -65,30 +106,109 @@ else
    verbose=false
 fi
 
+
+while getopts hq opt ; do
+   case $opt in
+      q) verbose=false
+         ;;
+      h) usage
+          ;;
+      *) 
+         ;;
+   esac
+done
+
+shift $(expr $OPTIND - 1)
+if [[ $# -ne 1 ]] ; then
+   if $verbose ; then
+      usage "wrong number of arguments"
+   else
+      clean_up 10
+   fi
+fi
+
+hostname=$1
+
+
 $verbose && echo ""
 
+if [[ -z "$hostname" ]] ; then
+   error "No hostname/domain given!"
+   clean_up 10
+fi
+
+
+#---------------------------------------
+#-----------------------------
+# Setting Defaults
+#-----------------------------
+#---------------------------------------
+
+DEFAULT_CONF_FILE_DIR="/etc/bind"
+
+
+
+#---------------------------------------
+#-----------------------------
+# Load default values from bind.conf
+#
+# Overwrites the settings above
+# 
+#-----------------------------
+#---------------------------------------
+
+if $verbose ; then
+   clear
+   echo ""
+   echo -e "\033[32mRunning script \033[1m"$(basename $0)"\033[m .."
+   echo ""
+fi
+
+
+info "Given hostname: \033[1m${hostname}\033[m"
+
+
+echononl "\t   Loading default Configuration values from $(basename ${conf_file}).."
+if [[ ! -f "$conf_file" ]]; then
+   echo_skipped
+else
+   source "${conf_file}" > $log_file 2>&1
+   if [[ $? -eq 0 ]]; then
+      echo_ok
+   else
+      echo_failed
+      fatal "$(cat $log_file)"
+   fi
+fi
+
+[[ -n "$CONF_FILE_DIR" ]] || CONF_FILE_DIR="$DEFAULT_CONF_FILE_DIR"
+[[ -n "$ZONES_DECLARATION_FILE" ]] || ZONES_DECLARATION_FILE="${CONF_FILE_DIR}/named.conf.local"
+
+$verbose && echo ""
+
+
 
 # - Validate Syntax of given domain
 # -
 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]))*$"
-$verbose && echononl "\tValidate syntax of given hostname/domain.."
+echononl "\t   Validate syntax of given hostname/domain.."
 if [[ $hostname =~ $valid_domain_regex ]]; then
    if [[ ! $hostname =~ \. ]]; then
-       $verbose && echo_failed
+       echo_failed
-       $verbose && error "Invalid hostname/domain given!"
+       error "Invalid hostname/domain given!"
-       exit 10
+       clean_up 10
    else
-      $verbose && echo_ok
+      echo_ok
    fi
 else
-   $verbose && echo_failed
+   echo_failed
-   $verbose && error "Invalid hostname/domain given!"
+   error "Invalid hostname/domain given!"
-   exit 10
+   clean_up 10
 fi
 
 _failed=false
 _hostname=$(echo ${hostname//\./\\.})
-while ! grep -e "$_hostname" $ZONE_CONF_FILE > /dev/null 2>&1 ; do
+while ! grep -E "^\s*zone\s+\"?$_hostname" $ZONES_DECLARATION_FILE > /dev/null 2>&1 ; do
    hostname=${hostname#*.}
    _hostname=$(echo ${hostname//\./\\.})
    if [[ ! $_hostname =~ \. ]]; then
@@ -102,12 +222,12 @@ if $_failed ; then
 else
    domain=$hostname
    if $verbose  ; then
-      info "Domain: $domain"
+      info "Hosted Zone: \033[1m${domain}\033[m"
    else
       echo "$domain"
    fi
 fi
 
 $verbose && echo
-exit 0
+clean_up 0