contrib/openresolv/named.in

   1 #!/bin/sh
   2 # Copyright (c) 2007-2023 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 "${named_zones}${named_options}" ] && exit 0
  32 [ -z "$RESOLVCONF" ] && eval "$(@SBINDIR@/resolvconf -v)"
  33 NL="
  34 "
  35
  36 # Platform specific kludges
  37 if [ -z "${named_service}${named_restart}" ] &&
  38    [ -d "$RCDIR" ] && ! [ -x "$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
  50 : ${named_pid:=/var/run/$named_service.pid}
  51 [ -s "$named_pid" ] || named_pid=/var/run/$named_service/$named_service.pid
  52 [ -s "$named_pid" ] || unset named_pid
  53
  54 newoptions="# Generated by resolvconf$NL"
  55 newzones="$newoptions"
  56
  57 forward=
  58 for n in $NAMESERVERS; do
  59         case "$forward" in
  60         *"$NL   $n;"*);;
  61         *) forward="$forward$NL $n;";;
  62         esac
  63 done
  64 if [ -n "$forward" ]; then
  65         newoptions="${newoptions}forward first;${NL}forwarders {$forward${NL}};$NL"
  66 fi
  67
  68 for d in $DOMAINS; do
  69         newzones="${newzones}zone \"${d%%:*}\" {$NL"
  70         newzones="$newzones     type forward;$NL"
  71         newzones="$newzones     forward first;$NL       forwarders {$NL"
  72         ns="${d#*:}"
  73         while [ -n "$ns" ]; do
  74                 newzones="$newzones             ${ns%%,*};$NL"
  75                 [ "$ns" = "${ns#*,}" ] && break
  76                 ns="${ns#*,}"
  77         done
  78         newzones="$newzones     };$NL};$NL"
  79 done
  80
  81 # Try to ensure that config dirs exist
  82 if command -v config_mkdirs >/dev/null 2>&1; then
  83         config_mkdirs "$named_options" "$named_zones"
  84 else
  85         @SBINDIR@/resolvconf -D "$named_options" "$named_zones"
  86 fi
  87
  88 # No point in changing files or reloading bind if the end result has not
  89 # changed
  90 changed=false
  91 if [ -n "$named_options" ]; then
  92         if [ ! -f "$named_options" ] || \
  93                 [ "$(cat "$named_options")" != "$(printf %s "$newoptions")" ]
  94         then
  95                 printf %s "$newoptions" >"$named_options"
  96                 changed=true
  97         fi
  98 fi
  99 if [ -n "$named_zones" ]; then
 100         if [ ! -f "$named_zones" ] || \
 101                 [ "$(cat "$named_zones")" != "$(printf %s "$newzones")" ]
 102         then
 103                 printf %s "$newzones" >"$named_zones"
 104                 changed=true
 105         fi
 106 fi
 107
 108 # named does not seem to work with SIGHUP which is a same
 109 if $changed; then
 110         if [ -n "$named_restart" ]; then
 111                 eval $named_restart
 112         elif [ -n "$RESTARTCMD" ]; then
 113                 set -- ${named_service}
 114                 eval "$RESTARTCMD"
 115         else
 116                 @SBINDIR@/resolvconf -r ${named_service}
 117         fi
 118 fi