#!/bin/bash
# Mac backup script for OS X.
# $Id: netbackup,v 1.12 2006/10/03 03:18:56 perette Exp perette $
# Copyright 2003 - 2006 Perette Barella.
# Released under the GNU public license.
# Backs up to a remote machine using rsync over ssh.
# Hidden resource files are copied to <name>.resource while the
# backup takes place, thus you'll need some free space for this to
# take place.  The files are deleted on completion, and a signal
# handler cleans up in case of an interruption.
# If going from Mac to Mac, you can use the -E version of rsync...
# but that doesn't work with most non-mac rsyncs, so it's disabled.
#
# To restore:
# rsync manually back to the Mac, then resourcefork -r integrate <directory>
status=0



######################################################################
# Function:	usage
# Purpose:	Displays the usage of this command.
# Author:	Perette Barella
#---------------------------------------------------------------------
function usage
{
	echo "Usage: $arg0 [-d] [-i]"
	exit 1
}
##### End of function usage #####






######################################################################
# Function:	parse_arguments
# Purpose:	Parses the command line arguments
# Arguments:	The command line arguments.
# Returns:	Number of arguments parsed.
# Author:	Perette Barella
#---------------------------------------------------------------------
function parse_arguments
{
	typeset option
	DELETE=""
	RESTORE=false
	while getopts 'dr?' option
	do
		case "$option" in
			d)	DELETE="--delete --delete-excluded" ;;
			r)	RESTORE=true ;;
			*)	usage ;;
		esac
	done
	typeset status=0
	return $((OPTIND - 1))
}
##### End of function parse_arguments #####



function cleanup_resource
{
	echo "$arg0: Cleaning up .resource files." >/dev/tty
	[ -f "$resourcefiles" ] && resourcefork -f "$resourcefiles" hide $user
	exit $?
}

function backup_user
{
	resourcefiles="/var/tmp/$arg0.$$.tmp"
	typeset resourceopts="-E"

	# Copy the Mac resource files into viewable resources.
	IFS=""
	if ! $GOOD_RSYNC
	then
		trap "cleanup_resource" SIGINT SIGABRT SIGQUIT SIGHUP
		resourcefork -u -f "$resourcefiles" expose $user
		resourceopts=""
	fi
	$GOOD_RSYNC && return 0

	$HOME/bin/rsync -v -a -H -x $resourceopts --delete $compress \
		--exclude="Library/Caches/*" \
		--exclude="Public/Video Queue/*" \
		--exclude=".Trash/*" \
		--delete-excluded \
		$user/ \
		$user@$dest/$host
	typeset status=$?

	# Remove the resource file copies in place.
	resourcefork -f "$resourcefiles" hide $user
	return $status
}





cd ~/.. || exit 1
arg0=$(basename "$0") || exit 1

parse_arguments "$@"
shift $?

# Mac OS X 10.4 has a -E version for rsync which does all the
# handling of the resource files that this script did before,
# plus it handles the new file metadata.  Use -E if it's available.
release=$(uname -r)
major_release=$(echo $release | cut -d. -f1)

GOOD_RSYNC=false
[ $major_release -ge 8 ] && GOOD_RSYNC=false

user="$USER"
compress=""

host="$(hostname | cut -d. -f1)"
if ping -c1 -q BACKUPHOST >/dev/null 2>&1
then
	backuphost=BACKUPHOST
	compress=""
else
	backuphost=BACKUPHOST.DOMAIN.NET
	compress="-z"
	host=MY_HOSTNAME
fi
dest="$backuphost:/Users/perette"

if $RESTORE
then
	echo "Can't automatically restore."
	exit $?
fi


backup_user
status=$?

# Integrate the resource forks on the destination machine
ssh -n $backuphost "resourcefork -u integrate $host"

exit $status