3 # this is a library of functions shared by scripts in the system folder.
5 # Author: Chris Koeritz
7 # removes a full domain from the DNS.
8 function remove_domain_file()
10 local domain_name="$1"; shift
12 local domain_file="/etc/bind/${domain_name}.conf"
13 if [ -f "$domain_file" ]; then
14 # don't destroy, just shuffle.
15 \mv -f "$domain_file" "/tmp/$(basename ${domain_file})-old-${RANDOM}"
16 test_or_die "removing domain file: $domain_file"
20 # creates a totally new domain config file for DNS.
21 function write_new_domain_file()
23 local domain_name="$1"; shift
25 local domain_file="/etc/bind/${domain_name}.conf"
27 echo "adding a totally new domain called $domain_name"
28 echo "using the config file: $domain_file"
30 if [ -f $domain_file ]; then
32 echo "The domain configuration file already exists at:"
34 echo "Since we don't want to tear that down if it has specialized configuration"
35 echo "data in it, we will just leave it in place and consider our job done."
42 @ IN SOA @ ${SERVER_ADMIN}. (
49 IN NS ${MAIN_NAME_SERVER}.
50 IN MX 10 ${MAIL_SERVER}.
52 ${domain_name}. IN A ${IP_ADDRESS}
53 IN HINFO \"linux server\" \"${DISTRO}\"
56 # our personalized configuration approach wants the real owner to own the file.
57 chown "$(logname):$(logname)" $domain_file
58 test_or_die "setting ownership on: $domain_file"
61 # takes a zone back out of the local conf file for bind
62 function remove_zone_for_domain()
64 local domain_name="$1"; shift
66 local domain_file="/etc/bind/${domain_name}.conf"
68 # eat the zone file definition. this will botch up badly if more text was added
69 # or the zone info shrank.
70 create_chomped_copy_of_file "/etc/bind/named.conf.local" "zone.*${domain_name}" 6
73 # hooks up a new config file into bind's list of zones.
74 function add_zone_for_new_domain()
76 local domain_name="$1"; shift
78 local domain_file="/etc/bind/${domain_name}.conf"
80 echo "adding a new domain configured by ${domain_file} into"
81 echo "the named.conf.local configuration file."
83 # append the reference to the new conf file in the zone list.
85 zone \"${domain_name}\" in {
86 file \"${domain_file}\";
91 ////////////////////////////////////////////////////////////////////////////
93 " >> /etc/bind/named.conf.local
95 # keep ownership for the real user.
96 chown "$(logname):$(logname)" /etc/bind/named.conf.local
97 test_or_die "setting ownership on: /etc/bind/named.conf.local"
100 # zaps a subdomain out of the containing domain file.
101 function remove_subdomain()
103 local old_domain="$1"; shift
105 # split up the full domain name into subdomain portion and containing domain.
106 local subdomain="${old_domain%.*.*}"
107 local containing_domain="${old_domain#*.}"
109 echo "removing subdomain $subdomain from containing domain $containing_domain"
111 local domain_file="/etc/bind/${containing_domain}.conf"
112 # see if config file already exists; if not, complain.
113 if [ ! -f "$domain_file" ]; then
114 echo "The domain configuration file for $old_domain is missing."
115 echo "It should already be present in: $domain_file"
116 echo "We cannot remove a subdomain if the containing domain isn't there."
120 # see if subdomain already present in config.
121 if ! grep -q "$old_domain" "$domain_file"; then
122 echo "The subdomain $subdomain is already missing from the domain"
123 echo "configuration file: $domain_file"
124 echo "Our work is apparently done for removing it."
128 create_chomped_copy_of_file "$domain_file" \
129 "${subdomain}.*${containing_domain} *IN *A *${IP_ADDRESS}" 1
132 # adds a new subdomain under a containing domain.
133 function add_new_subdomain()
135 local new_domain="$1"; shift
137 # split up the full domain name into subdomain portion and containing domain.
138 local subdomain="${new_domain%.*.*}"
139 local containing_domain="${new_domain#*.}"
141 echo "adding a subdomain $subdomain to containing domain $containing_domain"
143 local domain_file="/etc/bind/${containing_domain}.conf"
144 # see if config file already exists; if not, complain.
145 if [ ! -f "$domain_file" ]; then
146 echo "The domain configuration file for $new_domain is missing."
147 echo "It should already be present in: $domain_file"
148 echo "Please add the containing domain before trying to add a subdomain."
152 # see if subdomain already present in config.
153 if grep -q "$new_domain" "$domain_file"; then
154 echo "The subdomain $subdomain already seems to exist in the domain"
155 echo "configuration file: $domain_file"
156 echo "Please edit the config file to remove the subdomain before trying"
157 echo "to re-add the subdomain."
161 # append the new subdomain into the config file.
163 ${subdomain}.${containing_domain}. IN A ${IP_ADDRESS}
164 IN HINFO \"linux server\" \"${DISTRO}\"
165 " >> /etc/bind/${containing_domain}.conf
167 # keep ownership for real user.
168 chown "$(logname):$(logname)" "/etc/bind/${containing_domain}.conf"
169 test_or_die "setting ownership on: /etc/bind/${containing_domain}.conf"
172 function restart_bind()
174 echo restarting DNS server.
175 service bind9 restart
176 if [ $? -ne 0 ]; then
177 echo "The bind service did not restart properly. Please check the error logs."
180 echo DNS server restarted.