From 4b2c42ec99f9e3e72e6c5e18b58e2778240d87a0 Mon Sep 17 00:00:00 2001
From: Christoph <ckubu@oopen.de>
Date: Tue, 21 Feb 2017 02:28:05 +0100
Subject: [PATCH] Initial import

---
 dhcp_sync_from_primary.sh | 150 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 150 insertions(+)
 create mode 100755 dhcp_sync_from_primary.sh

diff --git a/dhcp_sync_from_primary.sh b/dhcp_sync_from_primary.sh
new file mode 100755
index 0000000..0ce2877
--- /dev/null
+++ b/dhcp_sync_from_primary.sh
@@ -0,0 +1,150 @@
+#!/usr/bin/env bash
+
+# ---
+# - Script checks, if host declarations at (this) dhcp failover server
+# - are in sync with primary dhcp server. If needed, dhcp failover server
+# - will be updated.
+# ---
+
+src_host=gw-ah.kanzlei-kiel.netz
+
+src_file_remote=/etc/dhcp/hosts.lan.conf
+target_file_local=/etc/dhcp/hosts.lan.conf
+
+# -------------
+# --- Some functions
+# -------------
+echononl(){
+   echo X\\c > /tmp/shprompt$$
+   if [ `wc -c /tmp/shprompt$$ | awk '{print $1}'` -eq 1 ]; then
+      echo -e -n "$*\\c" 1>&2
+   else
+       echo -e -n "$*" 1>&2
+   fi
+   rm /tmp/shprompt$$
+}
+
+fatal(){
+   echo ""
+   echo -e "fatal error: $*"
+   echo ""
+   echo -e "\t\033[31m\033[1mInstalllation will be interrupted\033[m\033[m"
+   echo ""
+   exit 1
+}
+
+error(){
+   echo ""
+   echo -e "\t[ \033[31m\033[1mFehler\033[m ]: $*"
+   echo ""
+}
+
+warn (){
+   echo ""
+   echo -e "\t[ \033[33m\033[1mWarning\033[m ]: $*"
+   echo ""
+}
+
+info (){
+   echo ""
+   echo -e "\t[ \033[32m\033[1mInfo\033[m ]: $*"
+   echo ""
+}
+
+echo_done() {
+   echo -e "\033[80G[ \033[32mdone\033[m ]"
+}
+echo_ok() {
+   echo -e "\033[80G[ \033[32mok\033[m ]"
+}
+echo_warning() {
+   echo -e "\033[80G[ \033[33m\033[1mwarn\033[m ]"
+}
+echo_failed(){
+   echo -e "\033[80G[ \033[1;31mfailed\033[m ]"
+}
+echo_skipped() {
+   echo -e "\033[80G[ \033[33m\033[1mskipped\033[m ]"
+}
+
+
+# - Is this script running on terminal ?
+# -
+if [[ -t 1 ]] ; then
+      terminal=true
+else
+   terminal=false
+fi
+
+
+# - Is this a systemd system?
+# -
+if [[ "X`which systemd`" = "X" ]]; then
+   systemd_exists=false
+else
+   systemd_exists=true
+fi
+
+tmp_include_file="/tmp/$(basename $src_file_remote).$$"
+tmp_err_msg=$(mktemp)
+
+rsync -a -q -e ssh ${src_host}:${src_file_remote}  $tmp_include_file > $tmp_err_msg 2>&1
+if [[ $? -ne 0 ]]; then
+   if $terminal ; then
+      error "$(cat $tmp_err_msg)"
+   else
+      echo -e "\n[ Error ]: $(cat $tmp_err_msg)"
+   fi
+
+   rm -f $tmp_include_file
+   rm -f $tmp_err_msg
+   exit 1
+fi
+
+diff $tmp_include_file $target_file_local > $tmp_err_msg 2>&1 
+if [[ $? -ne 0 ]]; then
+   cp -a $tmp_include_file $target_file_local
+   if $systemd_exists ; then
+      systemctl restart isc-dhcp-server > $tmp_err_msg 2>&1
+      if [[ $? -ne 0 ]]; then
+         if $terminal ; then
+            error "$(cat $tmp_err_msg)"
+         else
+            echo -e "\n[ Error ]: $(cat $tmp_err_msg)"
+         fi
+
+         rm -f $tmp_include_file
+         rm -f $tmp_err_msg
+         exit 1
+      else
+         if $terminal ; then
+            echo -e "\n\tUpdate was successfully done.\n"
+         fi
+      fi
+   else
+      /etc/init.d/isc-dhcp-server restart > $tmp_err_msg 2>&1 
+      if [[ $? -ne 0 ]]; then
+         if $terminal ; then
+            error "$(cat $tmp_err_msg)"
+         else
+            echo -e "\n[ Error ]: $(cat $tmp_err_msg)"
+         fi
+
+         rm -f $tmp_include_file
+         rm -f $tmp_err_msg
+         exit 1
+      else
+         if $terminal ; then
+            echo -e "\n\tUpdate was successfully done.\n"
+         fi
+      fi
+   fi
+else
+   if $terminal ; then
+      echo -e "\n\tServer is already up-to-date.\n"
+   fi
+fi
+
+rm -f $tmp_include_file
+rm -f $tmp_err_msg
+exit 0