From 78c923f35b27882ac0806c852495e9e8b1ee2246 Mon Sep 17 00:00:00 2001
From: Emmanuel Lacour <elacour@easter-eggs.com>
Date: Fri, 7 Nov 2008 11:03:26 +0100
Subject: [PATCH 1/1] Initial commit.

---
 README    |  36 +++++++++++++++++++
 copyright |  16 +++++++++
 ddnsedit  | 117 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 169 insertions(+)
 create mode 100644 README
 create mode 100644 copyright
 create mode 100755 ddnsedit

diff --git a/README b/README
new file mode 100644
index 0000000..6898833
--- /dev/null
+++ b/README
@@ -0,0 +1,36 @@
+This program let you edit dynamic dns zones like standard zones. Here is the
+process used when you call this program:
+
+- ddnsedit query the server for the specified zone
+- ddnsedit run $EDITOR on a copy of the zone
+- you make your changes on the zone, then save and quit the editor like on a
+  standard zone
+- ddnsedit presents you a summary of your changes and ask you to confirm your
+  update
+- on confirm, it runs the needed nsupdate commands to update the zone
+
+It is released under the GNU GPL (see copyright for more details).
+
+Requirements:
+------------
+You need to have the following programs installed along with a dns server with
+a zone configured for dynamic updates and that allows the computer where you
+run ddnsedit to do the update and to transfer the zone.
+
+- bash
+- mktemp
+- nsupdate
+- dig
+- diff
+- cat
+
+Installation:
+------------
+
+Put ddnsedit in your PATH (/usr/local/bin for example).
+
+Usage:
+-----
+
+Just run "ddnsedit" without options to get help.
+
diff --git a/copyright b/copyright
new file mode 100644
index 0000000..b0c18d9
--- /dev/null
+++ b/copyright
@@ -0,0 +1,16 @@
+Copyright (C) 2008  Emmanuel Lacour <elacour@home-dn.net>
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301,
+  USA.
diff --git a/ddnsedit b/ddnsedit
new file mode 100755
index 0000000..ef8344e
--- /dev/null
+++ b/ddnsedit
@@ -0,0 +1,117 @@
+#!/bin/bash
+#
+# Name: ddnsedit
+# Description: Edit a dynamic dns zone with an editor, then update it by
+# calling "nsupdate"
+#
+# Copyright (C) 2008  Emmanuel Lacour <elacour@home-dn.net>
+# 
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 2 of the License, or
+#  (at your option) any later version.
+# 
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+# 
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301,
+#  USA.
+
+
+
+SERVER=$1
+ZONE=$2
+
+
+function usage {
+    echo "Usage: `basename $0` SERVER ZONE_NAME"
+    exit 0
+}
+
+if [ ! -n "$ZONE" ]
+then
+    echo "Missing zone name!"
+    usage
+fi
+
+if [ ! -n "$SERVER" ]
+then
+    echo "Missing server!"
+    usage
+fi
+
+
+# Cleanup zone name
+if [ `echo "$ZONE" | grep -c '\.$'` -eq 0 ]
+then
+    ZONE="$ZONE."
+fi
+
+FILE_O=`mktemp /tmp/nsedit_o.XXXXXX`
+FILE_N=`mktemp /tmp/nsedit_n.XXXXXX`
+FILE_D=`mktemp /tmp/nsedit_d.XXXXXX`
+FILE_U=`mktemp /tmp/nsedit_u.XXXXXX`
+FILE_ERR=`mktemp /tmp/nsedit_err.XXXXXX`
+
+# Get the current zone
+# (skip SOA wich cannot be updated by nsupdate)
+dig @$SERVER $ZONE AXFR | grep -Ev '^;|^$' | grep -v 'IN	SOA	' > $FILE_O
+
+# Duplicate the zone
+cat $FILE_O > $FILE_N
+
+function main {
+    # Edit the zone
+    $EDITOR $FILE_N
+
+    # Diff between old and new file
+    diff -au $FILE_O $FILE_N | grep -E '^-|^\+' | grep -Ev '^--- |^\+\+\+ ' > $FILE_D
+
+    if [ ! -s $FILE_D ]
+    then
+        echo "Empty changes, exiting!"
+        exit 0
+    fi
+
+    # Prepare nsupdate file
+    echo "server $SERVER" > $FILE_U
+    # Diff between zones
+    sed 's/^-/update delete /g;s/^+/update add /g' $FILE_D >> $FILE_U
+    echo 'send' >> $FILE_U
+
+    echo "Do you really wan't to send the following updates?"
+    cat $FILE_U
+    echo -n "Answer (y/n):"
+    read a
+
+    if [ "$a" == "y" ]
+    then
+        nsupdate $FILE_U > $FILE_ERR 2>&1
+        if [ $? -ne 0 ]
+        then
+            echo "Update failed: "
+            cat $FILE_ERR
+            echo -n "Do you wan't to edit back you're file (y/n): "
+            read a
+            if [ "$a" == "y" ]
+            then
+                main
+            else
+                echo "Ok, exiting..."
+            fi
+        else
+            echo "Update succeded!"
+            cat $FILE_ERR
+        fi
+    else
+        echo "Ok, exiting..."
+    fi
+}
+
+main
+
+rm -f $FILE_O $FILE_N $FILE_D $FILE_U $FILE_ERR
-- 
2.11.0