+#!/bin/bash
+
+# this is a library of functions shared by scripts in the system folder.
+#
+# Author: Chris Koeritz
+
+#export WORKDIR="$( \cd "$(\dirname "$0")" && \pwd )" # obtain the script's working directory.
+#export FEISTY_MEOW_APEX="$( \cd "$WORKDIR/../.." && \pwd )"
+
+#source "$FEISTY_MEOW_APEX/scripts/core/launch_feisty_meow.sh"
+
+# creates a totally new domain config file for DNS.
+function write_new_domain_file()
+{
+ local domain_name="$1"; shift
+
+ local domain_file="/etc/bind/${domain_name}.conf"
+
+ echo "adding a totally new domain called $domain_name"
+ echo "using the config file: $domain_file"
+
+ if [ -f $domain_file ]; then
+ echo
+ echo "The domain configuration file already exists at:"
+ echo " $domain_file"
+ echo "Since we don't want to tear that down if it has specialized configuration"
+ echo "data in it, we will just leave it in place and consider our job done."
+ echo
+ exit 0
+ fi
+
+ echo "
+\$TTL 1W
+@ IN SOA @ ${SERVER_ADMIN}. (
+ 2017100801 ; serial
+ 2H ; refresh
+ 8M ; retry
+ 14D ; expiry
+ 6H ) ; minimum
+
+ IN NS ${MAIN_NAME_SERVER}.
+ IN MX 10 ${MAIL_SERVER}.
+
+${domain_name}. IN A ${IP_ADDRESS}
+ IN HINFO \"linux server\" \"${DISTRO}\"
+" >"$domain_file"
+
+ # our personalized configuration approach wants the real owner to own the file.
+ chown "$(logname):$(logname)" $domain_file
+ test_or_die "setting ownership on: $domain_file"
+}
+
+# hooks up a new config file into bind's list of zones.
+function add_zone_for_new_domain()
+{
+ local domain_name="$1"; shift
+
+ local domain_file="/etc/bind/${domain_name}.conf"
+
+ echo "adding a new domain configured by ${domain_file} into"
+ echo "the named.conf.local configuration file."
+
+ # append the reference to the new conf file in the zone list.
+ echo "
+zone \"${domain_name}\" in {
+ file \"${domain_file}\";
+ type master;
+ allow-query { any; };
+};
+
+////////////////////////////////////////////////////////////////////////////
+
+" >> /etc/bind/named.conf.local
+
+ # keep ownership for the real user.
+ chown "$(logname):$(logname)" /etc/bind/named.conf.local
+ test_or_die "setting ownership on: /etc/bind/named.conf.local"
+
+}
+
+# adds a new subdomain under a containing domain.
+function add_new_subdomain()
+{
+ local new_domain="$1"; shift
+
+ # split up the full domain name into subdomain portion and containing domain.
+ local subdomain="${new_domain%.*.*}"
+ local containing_domain="${new_domain#*.}"
+
+ echo "adding a subdomain $subdomain to containing domain $containing_domain"
+
+ local domain_file="/etc/bind/${containing_domain}.conf"
+ # see if config file already exists; if not, complain.
+ if [ ! -f "$domain_file" ]; then
+ echo "The domain configuration file for $new_domain is missing."
+ echo "It should already be present in: $domain_file"
+ echo "Please add the containing domain before trying to add a subdomain."
+ exit 1
+ fi
+
+ # see if subdomain already present in config.
+ if [ $(grep -q "$new_domain" "$domain_file") ]; then
+ echo "The subdomain $subdomain already seems to exist in the domain"
+ echo "configuration file: $domain_file"
+ echo "Please edit the config file to remove the subdomain before trying"
+ echo "to re-add the subdomain."
+ exit 1
+ fi
+
+ # append the new subdomain into the config file.
+ echo "
+${subdomain}.${containing_domain}. IN A ${IP_ADDRESS}
+ IN HINFO \"linux server\" \"${DISTRO}\"
+" >> /etc/bind/${containing_domain}.conf
+
+ # keep ownership for real user.
+ chown "$(logname):$(logname)" "/etc/bind/${containing_domain}.conf"
+ test_or_die "setting ownership on: /etc/bind/${containing_domain}.conf"
+}
+
+function restart_bind()
+{
+ echo restarting DNS server.
+ service bind9 restart
+ if [ $? -ne 0 ]; then
+ echo "The bind service did not restart properly. Please check the error logs."
+ exit 1
+ fi
+ echo DNS server restarted.
+}
+