Backup configuration files before you break them.

tinyback.sh

#!/bin/bash

# $Id: tinyback.sh 33 2007-05-02 14:18:50Z damonp $
#
# Shell script to create backup of a list of files
#
# Copyright (c) 2007 Damon Parker < damonp@damonparker.org >
# Licensed under the GNU GPL.  See http://www.gnu.org/licenses/gpl.html

# This script is not supported in any way.  Use at your own risk.
# 

# START configure 

# OPTIONAL ITEMS
configfile=~/.tinyback
now=`date +"%m-%d-%Y"`
backfile="`echo $USER.$HOSTNAME`.$now.tar.gz"
cat=`which cat`
grep=`which grep`
tar=`which tar`
# END configure

# check for configfile, create if necessary
[ ! -f $configfile ] && touch $configfile || :

# convert relative paths to absolute paths
absolute_path () {
	local startdir=`pwd`
  	if [ "${newfile}" = "${newfile#/}" ]; then
  		newfile=$startdir/$newfile;
  	fi
}

case "$1" in 
	'add' | 'a') 
		newfile=$2
		absolute_path

		# make sure that file or dir exists to backup
		if [ ! -f $newfile ]; then
		   if [ ! -d $newfile ]; then
			  echo "$newfile does not exists"
			  exit 2
		   fi
		fi
		
		# make sure we don't add duplicates
		cat $configfile | grep -w $newfile > /dev/null
		if [ "$?" == "0" ]; then
		   echo "$newfile exists in $configfile"
		   exit 3
		fi 
		
		# add file to backup list
		echo "$newfile" >> $configfile
		echo "$newfile added to $configfile"
	;;
	'backup' | 'b') 
		if [ "$2" == "" ]; then
			echo "No host to backup files to supplied"
		fi
		
		# make sure we put backup in our own tmp and not in /tmp
		[ ! -d ~/tmp ] && mkdir ~/tmp || :
		if [ -f $configfile ]; then
			files="`cat $configfile | grep -E -v "^#"`"
		else
			echo "File $configfile does not exists"
			exit 3
		fi
		
		if [ "$files" == "" ]; then
			echo "$configfile is empty, please add list of files/directories to backup"
			echo "Use `$basename $0` add <filename>"
			exit 2
		fi

		$tar -zcf ~/tmp/$backfile $files >/dev/null
		
		scp ~/tmp/$backfile $2:
		
		rm ~/tmp/$backfile
	;;
	'edit' | 'e') 
		pico=`which pico`
		vim=`which vim`
		if [ -x $pico ]; then
			$pico $configfile
		elif [ -x $vim ]; then
			$vim $configfile
		fi
	;; 	
	'help' | 'h') 
		echo "Usage: `basename $0` <command> [args]
	add <filename> 		add filename to backup file list
	backup <user@host>	create backup file and copy to host using scp
	edit			edit backup file list with pico or vim
	help			this help file
	list			list files to be backed up
	short commands a, b, e, h and l also supported";
	;;
	'list' | 'l') 
		echo "Files selected to be backed up:"
		cat $configfile
	;;
	*)
		echo "tinyback v0.8 
Copyright (C) 2007 Damon Parker <damonp@damonparker.org>		
type \"`basename $0` help\" for usage
"
	;;
esac