lsyncd/lsyncd-action

#!/bin/bash

### 
# lsyncd-action
#
# This script will be called by lsyncd whenever it wants to sync something.
# It is supposed to be configured or even completly exchanged by you, to fit your needs.
# 
# First parameter is "startup" in case lsyncd startups, "change" in normal operations.
# Second parameter is rsync source 
# Third parameter is rsync destination.
#
# When this script returns a non-zero error code, lsyncd will either die
# or in the current implementation call it again with the parant directory if not in startup mode.
#
# This script is GPLv2 or later licensed like everything here.
#
set -e

### 
# You can add additional options you want to call rsync with here.
#
RSYNC_OPTIONS="--delete -lt"; 

###
# Adds -r (recursive) option in case of startup, or "-d" in case of normal operations.
# 
case $1 in 
	"startup")	SCOPE="r";;
	"change")   SCOPE="d";;
	*) echo "Unknown action reason option ($1)"; exit 1;;
esac

###
# The environment variable EXCLUDE_FILE will be set by lsyncd if an exclude file is configured.
#
if test $EXCLUDE_FILE != ""; then
	EXCLUDE_FILE="--exclude-from $EXCLUDE_FILE"
fi

while true; do 
	EXITVAL=0
	/usr/bin/rsync $RSYNC_OPTIONS$SCOPE $EXCLUDE_FILE $2 $3 || EXITVAL=$?
	case $EXITVAL in
	0)				# everything okay
			break;;
	5|10|12)		# on temporary errors recall rsync
			echo "recalling rsync on non-fatal error ($EXITVAL)"
			sleep 10
			;;
	*)				# really bad error
			exit $EXITVAL;;
	esac
done

###
# If you want to add some actions to be performed after rsync you can do here.
#