btrfsmaintenance-refresh-cron.sh

#!/bin/sh
#
# Copyright (c) 2014 SuSE Linux AG, Nuernberg, Germany.
#
# please send bugfixes or comments to http://www.suse.de/feedback.

# Adjust symlinks of btrfs maintenance services according to the configs.
# Run with 'uninstall' to remove them again

#
# paranoia settings
#
umask 022
PATH=/sbin:/bin:/usr/sbin:/usr/bin
export PATH

SCRIPTS=/usr/share/btrfsmaintenance

if [ "$1" = 'uninstall' ]; then
	for SCRIPT in btrfs-scrub.sh btrfs-defrag.sh btrfs-balance.sh btrfs-trim.sh; do
		for PERIOD in daily weekly monthly; do
			LINK="${SCRIPT%.*}"
			FILE="/etc/cron.$PERIOD/$LINK"
			rm -f "$FILE"
		done
	done
	exit 0
fi

if [ -f /etc/sysconfig/btrfsmaintenance ]; then
    . /etc/sysconfig/btrfsmaintenance
fi

if [ -f /etc/default/btrfsmaintenance ]; then
    . /etc/default/btrfsmaintenance
fi

refresh_period() {
	EXPECTED="$1"
	SCRIPT="$2"
	echo "Refresh script $SCRIPT for $EXPECTED"

	for PERIOD in daily weekly monthly; do
	        # NOTE: debian does not allow filenames with dots in /etc/cron.*
	        LINK="${SCRIPT%.*}"
		FILE="/etc/cron.$PERIOD/$LINK"
		if [ "$PERIOD" = "$EXPECTED" ]; then
			ln -sf "$SCRIPTS/$SCRIPT" "$FILE"
		else
			rm -f "$FILE"
		fi
	done
}

refresh_period "$BTRFS_SCRUB_PERIOD" btrfs-scrub.sh
refresh_period "$BTRFS_DEFRAG_PERIOD" btrfs-defrag.sh
refresh_period "$BTRFS_BALANCE_PERIOD" btrfs-balance.sh
refresh_period "$BTRFS_TRIM_PERIOD" btrfs-trim.sh