initial commit of sync-router script, working for my router and git repo now

sync-router

@@ -0,0 +1,92 @@
+#!/bin/bash -e
+#
+# sync-router	shell scripts to synchronize cisco configuration and DHCP static
+#		lease files with with GIT repository. Operations performed:
+#		  - update header of modified DHCP static lease files, upload
+#		    them using using scp and add them to the next commit
+#		  - restart Cisco DHCP service after updating static lease files
+#		  - copy Cisco startup-config using scp and add to next commit
+#		  - commit changes to the git repository
+#
+# Version 1.0, latest version at: https://gitlab.lindenaar.net/scripts/cisco
+#
+# Copyright (c) 2016 Frederik Lindenaar
+#
+# This script is free software: you can redistribute and/or modify it under the
+# terms of version 3 of the GNU General Public License as published by the Free
+# Software Foundation, or (at your option) any later version of the license.
+#
+# This script 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, visit <http://www.gnu.org/licenses/> to download it.
+
+### Configuration ###
+router=`basename \`dirname $0 | pwd\``	# name of router - based on directory
+syncfiles=dhcp-\*			# list/pattern of dhcp lease files
+fileto=flash:				# location of dhcp lease files on cisco
+
+### Implementation ###
+echo updating with $router
+
+# Process the DHCP static lease files that have changed
+git status -s "$syncfiles" | while read status filename
+do
+  case $status in
+    \?\?)
+	echo skipping $filename as it is not yet added to the repository
+	;;
+    D)
+	echo removing  $filename as it is no longer in the repository
+	ssh -q $router "delete /force $fileto$filename"
+	;;
+    A |M)
+  	echo updating and uploading modified file $filename
+	head -2 $filename | while read tag value
+	  do
+	    case $tag in
+	      \*time\*)
+		date +"$tag %h %d %Y %l:%M %p" > .$filename.$$.tmp
+		;;
+	      \*version\*)
+		echo $tag $[ $value + 1 ] >> .$filename.$$.tmp
+		;;
+	      *)
+		echo "found unknown entry \"$tag $value\", aborting"
+		exit 1
+		;;
+	      esac
+	  done
+	tail +3 $filename >> .$filename.$$.tmp
+	scp -q .$filename.$$.tmp $router:$fileto$filename
+	mv .$filename.$$.tmp $filename
+	git add $filename
+	;;
+    *)
+	echo unsupported git status "$status", aborting
+	exit 1
+	;;
+  esac
+done
+
+# Restart the DHCP service on the router if any of the dhcp files changed
+if git status -s "$syncfiles" | egrep -q ^[MAD]; then
+  echo restarting dhcp service
+  cat << EOT | ssh -q $router
+configure terminal
+no service dhcp
+service dhcp
+exit
+exit
+EOT
+fi
+
+# Fetch the current start-up configuration and add it to the repository
+scp -q $router:startup-config .
+git diff startup-config
+git add startup-config
+
+# and commit the changes (or unadd new configuration when commit is aborted)
+git commit || git reset HEAD startup-config