#!/bin/bash

# contab example to backup every configuration:
# */1 * * * * /mnt/wd/ext/backup/bin/trigger -a
#
# additional verbose logging:
# */1 * * * * /mnt/wd/ext/backup/bin/trigger -a -l /var/log/trigger.log
#
# backup of configurations 'foo' and 'bar'
# */1 * * * * /mnt/wd/ext/backup/bin/trigger foo bar

function log {
	[ "$dolog" = "1" ] && echo "`date` - $@" >> $log
}

mode=single
confs=""
log=""
for arg in "$@"; do
	case $arg in
		-a)
			mode=all	
			shift
			;;
		-l)
			log=$2
			shift 2
			;;
		*)
			confs="$arg $confs"
			shift
			;;
	esac
done

prog=$0
pdir=`dirname $prog`
cdir=$pdir/../config

dolog=0
if [ ! -z "$log" ]; then
	mkdir -p `dirname $log`
	[ -d `dirname $log` ] && dolog=1
fi

if [ "$mode" = "all" ]; then
	confs=""
	for cf in $cdir/*.conf; do
		confs="`basename $cf | sed 's/\.conf$//'` $confs"
	done
fi

log triggering backup of $confs ...
for conf in $confs; do
	if [ -f $cdir/${conf}.conf ]; then
		rp=`ps -ef | grep "[c]onfig/${conf}\.conf"` 
		if [ -z "$rp" ]; then
			cmd="$pdir/backup $cdir/${conf}.conf"
			log started backup of $conf ...
			nohup $cmd &>/dev/null &
		else
			log backup of $conf in progress ...
		fi
	else
		log no configuration found for $conf, doing nothing ...
	fi
done
log triggering completed, terminating ...