external/bsd/openresolv/dist/named.in

   1 #!/bin/sh
   2 # Copyright (c) 2007-2012 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 "$RESOLVCONF" ] && eval "$(@SBINDIR@/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         elif [ -x "@RCDIR@"/rc.bind ]; then
  44                 # Slackware
  45                 named_service=rc.bind
  46         fi
  47 fi
  48 : ${named_service:=named}
  49 : ${named_restart:=@RESTARTCMD ${named_service}@}
  50 newoptions="# Generated by resolvconf$NL"
  51 newzones="$newoptions"
  52
  53 forward=
  54 for n in $NAMESERVERS; do
  55         case "$forward" in
  56         *"$NL   $n;"*);;
  57         *) forward="$forward$NL $n;";;
  58         esac
  59 done
  60 if [ -n "$forward" ]; then
  61         newoptions="${newoptions}forward first;${NL}forwarders {$forward${NL}};$NL"
  62 fi
  63
  64 for d in $DOMAINS; do
  65         newzones="${newzones}zone \"${d%%:*}\" {$NL"
  66         newzones="$newzones     type forward;$NL"
  67         newzones="$newzones     forward first;$NL       forwarders {$NL"
  68         ns="${d#*:}"
  69         while [ -n "$ns" ]; do
  70                 newzones="$newzones             ${ns%%,*};$NL"
  71                 [ "$ns" = "${ns#*,}" ] && break
  72                 ns="${ns#*,}"
  73         done
  74         newzones="$newzones     };$NL};$NL"
  75 done
  76
  77 # Try to ensure that config dirs exist
  78 if type config_mkdirs >/dev/null 2>&1; then
  79         config_mkdirs "$named_options" "$named_zones"
  80 else
  81         @SBINDIR@/resolvconf -D "$named_options" "$named_zones"
  82 fi
  83
  84 # No point in changing files or reloading bind if the end result has not
  85 # changed
  86 changed=false
  87 if [ -n "$named_options" ]; then
  88         if [ ! -f "$named_options" ] || \
  89                 [ "$(cat "$named_options")" != "$(printf %s "$newoptions")" ]
  90         then
  91                 printf %s "$newoptions" >"$named_options"
  92                 changed=true
  93         fi
  94 fi
  95 if [ -n "$named_zones" ]; then
  96         if [ ! -f "$named_zones" ] || \
  97                 [ "$(cat "$named_zones")" != "$(printf %s "$newzones")" ]
  98         then
  99                 printf %s "$newzones" >"$named_zones"
 100                 changed=true
 101         fi
 102 fi
 103
 104 if $changed; then
 105         eval $named_restart
 106 fi