#!/bin/bash
#                       /usr/local/bin/darchive
#  http://crystalfaeries.net/posix/bin/darchive
# celeste:crystalfaery 2016-06-26 16:24:13+00:00

# currently configured to be invoked by /etc/cron.d/rsnapshot
#        http://crystalfaeries.net/posix/etc/cron.d/rsnapshot
#30	04	*	*	0	root	/usr/local/bin/darchive >> /var/log/dar.log 2>&1 || /usr/bin/tail /var/log/dar.log | /usr/bin/mail -s "darchive errs: `hostname`" root

# dar target directory:
darget=/var/cache/dar
# uncomment this version for darchives of rsnapshots
file_system="$(grep snapshot_root /etc/rsnapshot.conf|head -n 1|cut -f 2|sed 's/\/$//')/hourly.0"
# uncomment this version for darchives of the live filesystem
# file_system="/"

if [[ $# -gt 0 ]]
	then	# we have an argument
		if [ "$1" == "--dry-run" ]
			then	# we recognize it as a dry-run request
				dry_run="-e -v"	# dry run arguments for dar
				shift		# we have consumed the argument
			else	# unrecognized argument
				echo "$0: Argument Unrecognized." 1>&2
				exit 1	# error exit on bad argument
		fi
	else	# no arguments
		dry_run=""	# go for it
fi

/usr/local/bin/now >> /var/log/dar.log		# time tag the beginning of this execution
mkdir -p			$darget/$(/bin/hostname)	>> /var/log/dar.log	2>&1
# /usr/bin/time /usr/bin/nice /usr/bin/ionice -c 3 /usr/bin/dar --create			\
/usr/bin/time /usr/bin/nice /usr/bin/dar --create			\
				$darget/$(/bin/hostname)/$(/usr/local/bin/now -h)	\
--fs-root			$file_system						\
--no-warn=all			--key :$(/bin/cat /etc/darkey)				\
--exclude-from-file		/etc/darexclude		--slice 2G			\
--cache-directory-tagging	$dry_run			>> /var/log/dar.log	2>&1
/usr/local/bin/now >> /var/log/dar.log		# time tag the end of this execution

exit