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[openresolv] / named.in
1 #!/bin/sh
2 # Copyright (c) 2007-2011 Roy Marples
3 # All rights reserved
4
5 # named subscriber for resolvconf
6
7 # Redistribution and use in source and binary forms, with or without
8 # modification, are permitted provided that the following conditions
9 # are met:
10 #     * Redistributions of source code must retain the above copyright
11 #       notice, this list of conditions and the following disclaimer.
12 #     * Redistributions in binary form must reproduce the above
13 #       copyright notice, this list of conditions and the following
14 #       disclaimer in the documentation and/or other materials provided
15 #       with the distribution.
16 #
17 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29 [ -f "@SYSCONFDIR@"/resolvconf.conf ] || exit 0
30 . "@SYSCONFDIR@/resolvconf.conf" || exit 1
31 [ -z "$named_zones" -a -z "$named_options" ] && exit 0
32 [ -z "$RESOLVCONF" ] && eval "$(@PREFIX@/sbin/resolvconf -v)"
33 NL="
34 "
35
36 # Platform specific kludges
37 if [ -z "$named_service" -a -z "$named_restart" -a \
38         -d "@RCDIR@" -a ! -x "@RCDIR@"/named ]
39 then
40         if [ -x "@RCDIR@"/bind9 ]; then
41                 # Debian and derivatives
42                 named_service=bind9
43         fi
44 fi
45 : ${named_service:=named}
46 : ${named_restart:=@RESTARTCMD ${named_service}@}
47 newoptions="# Generated by resolvconf$NL"
48 newzones="$newoptions"
49
50 forward=
51 for n in $NAMESERVERS; do
52         case "$forward" in
53         *"$NL   $n;"*);;
54         *) forward="$forward$NL $n;";;
55         esac
56 done
57 if [ -n "$forward" ]; then
58         newoptions="${newoptions}forward first;${NL}forwarders {$forward${NL}};$NL"
59 fi
60
61 for d in $DOMAINS; do
62         newzones="${newzones}zone \"${d%%:*}\" {$NL"
63         newzones="$newzones     type forward;$NL"
64         newzones="$newzones     forward first;$NL       forwarders {$NL"
65         ns="${d#*:}"
66         while [ -n "$ns" ]; do
67                 newzones="$newzones             ${ns%%,*};$NL"
68                 [ "$ns" = "${ns#*,}" ] && break
69                 ns="${ns#*,}"
70         done
71         newzones="$newzones     };$NL};$NL"
72 done
73
74 # Try to ensure that config dirs exist
75 if type config_mkdirs >/dev/null 2>&1; then
76         config_mkdirs "$named_options" "$named_zones"
77 else
78         @PREFIX@/sbin/resolvconf -D "$named_options" "$named_zones"
79 fi
80
81 # No point in changing files or reloading bind if the end result has not
82 # changed
83 changed=false
84 if [ -n "$named_options" ]; then
85         if [ ! -f "$named_options" ] || \
86                 [ "$(cat "$named_options")" != "$(printf %s "$newoptions")" ]
87         then
88                 printf %s "$newoptions" >"$named_options"
89                 changed=true
90         fi
91 fi
92 if [ -n "$named_zones" ]; then
93         if [ ! -f "$named_zones" ] || \
94                 [ "$(cat "$named_zones")" != "$(printf %s "$newzones")" ]
95         then
96                 printf %s "$newzones" >"$named_zones"
97                 changed=true
98         fi
99 fi
100
101 if $changed; then
102         eval $named_restart
103 fi