#!/bin/bash
#                      /usr/local/bin/rsnapshot-postexec
# http://crystalfaeries.net/posix/bin/rsnapshot-postexec
# invoked by           /etc/rsnapshot.conf
# celeste:crystalfaery 2015-11-20 15:09:49+00:00

# The only accepted argument is "-du" to specify to run a disk useage analysis at the end of the run.
# NOTE: we are NOT reporting the size of the excluded-from-rsnapshot-backups directories:
#	/home/dar/
#	/home/public/	(which contains /home/public/downloads)
# as we will never consider them for inclusion in rsnapshots

# we handle either hourly or daily as maximum frequency of backups
	 file_system="$( grep snapshot_root /etc/rsnapshot.conf | head -n 1 | cut -f 2 | sed 's/\/$//' )"
cd	$file_system || exit 1	# nothing to do if no root file system?
cd	$file_system/daily.0/`hostname`  > /dev/null 2>&1
cd	$file_system/hourly.0/`hostname` > /dev/null 2>&1 
if	[ "$file_system" = "`pwd`" ]
	then
		exit 1 # we could not find any backups inside root file system?
	fi

#	CALCULATE DISK SPACE USED	#
if	[ "$#" != 0 ]
then
    if	[ "$1" == "-du" ]
    then
	rsnapshot du  2> /dev/null > /var/log/`hostname`.rsnapshot.du.txt
	du -a    -x 2> /dev/null | sed 's/	\./	/' | sort -k2 >> /var/log/`hostname`.rsnapshot.du.txt
	du -s    -x $( grep '^exclude' /etc/rsnapshot.conf | cut -f 2 | grep -v /home/dar | grep -v /home/public | grep -v /home/raid) 2> /dev/null | sed 's/	\./	/' | sort -k2 > /var/log/`hostname`.rsnapshot.excluded.txt
    else
	echo "$0 argument $1 unacceptable." 1>&2
	exit -1
    fi
    shift	# consume the argument
fi

exit $?