#!/usr/bin/env bash
##
# Copyright (C) 2013-2016 Janek Bevendorff
# Website: http://www.refining-linux.org/
# 
# Set quota for user
# 
# The MIT License (MIT)
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
##

if [[ "$1" == "" ]]; then
	. rs-version
	echo "Usage: $(basename $0) <username> [<soft limit> <hard limit> <inode soft limit> <inode hard limit>]"
	echo "       Limits are in bytes and can contain the postfixes k, M, G, T."
	echo "       If no limits are specified the default values from the config file will be used."
	exit
fi

. /etc/rs-backup/server-config

if ! $QUOTA_MOUNT_POINT; then
	echo "ERROR: No mount point specified in config files." >&2
	exit 1
fi

if [[ "$2" == "" ]] && [[ "$QUOTA_HARD_LIMIT" == "" ]]; then
	echo "ERROR: No limits have been specified. You need to set at least default values in your config file." >&2
	exit 1
fi

# Expand postfixes (kilobytes, megabytes, gigabytes, terabytes)
# and calculate number
expand_postfixes() {
	local number=$1

	number=$(echo "$number" | sed 's/k$/ * 1024/I')
	number=$(echo "$number" | sed 's/M$/ * 1024 * 1024/I')
	number=$(echo "$number" | sed 's/G$/ * 1024 * 1024 * 1024/I')
	number=$(echo "$number" | sed 's/T$/ * 1024 * 1024 * 1024 * 1024/I')
	number=$(echo "$number" | sed 's/[^0-9\*]//g')

	number=$(eval "echo $(($number))")
	echo "$number"
}

block_size=1024
quota_file_system="$QUOTA_MOUNT_POINT"
if [[ "$quota_file_system" == "" ]]; then
	quota_file_system="-a"
fi

soft_limit=$(expand_postfixes "$QUOTA_SOFT_LIMIT")
hard_limit=$(expand_postfixes "$QUOTA_HARD_LIMIT")
inode_soft_limit=$(expand_postfixes "$QUOTA_INODE_SOFT_LIMIT")
inode_hard_limit=$(expand_postfixes "$QUOTA_INODE_HARD_LIMIT")

[[ "$2" != "" ]] && soft_limit=$(expand_postfixes "$2")
[[ "$3" != "" ]] && hard_limit=$(expand_postfixes "$3")
[[ "$4" != "" ]] && inode_soft_limit=$(expand_postfixes "$4")
[[ "$5" != "" ]] && inode_hard_limit=$(expand_postfixes "$5")

soft_limit=$(($soft_limit / $block_size))
hard_limit=$(($hard_limit / $block_size))

setquota "$1" "$soft_limit" "$hard_limit" "$inode_soft_limit" "$inode_hard_limit" "$quota_file_system"