#!/bin/bash
# info: add system quota
# options: NONE
#
# example: v-add-sys-quota
#
# This function enables filesystem quota on /home partition
# Some kernels do require additional packages to be installed first

#----------------------------------------------------------#
#                 Variable & Function                      #
#----------------------------------------------------------#

# Includes
# shellcheck source=/usr/local/hestia/func/main.sh
source $HESTIA/func/main.sh
# load config file
source_conf "$HESTIA/conf/hestia.conf"

#----------------------------------------------------------#
#                    Verifications                         #
#----------------------------------------------------------#

# Ensure that quota kernel modules are installed
kernel_module_check=$(find /lib/modules/$(uname -r) -type f -name '*quota_v*.ko*' | egrep '.*' && [ $? -eq 0 ])
if [ -z "$kernel_module_check" ]; then
	# Install kernel modules for quota support.
	# Requires reboot to activate updated kernel.
	echo "Installing required kernel modules for quota support..."
	reboot_req="Y"
	apt-get -qq install linux-image-extra-virtual -y
	check_result $? "kernel module installation failed" "$E_UPDATE"
fi

# Checking quota package
quota=$(which --skip-alias --skip-functions quota 2> /dev/null)
if [ $? -ne 0 ]; then
	if [ -f "/etc/redhat-release" ]; then
		dnf -y install quota > /dev/null 2>&1
	else
		export DEBIAN_FRONTEND=noninteractive
		apt-get -y install quota > /dev/null 2>&1
	fi
	check_result $? "quota package installation failed" "$E_UPDATE"
fi

# Perform verification if read-only mode is enabled
check_hestia_demo_mode

#----------------------------------------------------------#
#                       Action                             #
#----------------------------------------------------------#

# Adding group and user quota on /home partition
mnt=$(df -P /home | awk '{print $6}' | tail -n1)
lnr=$(cat -n /etc/fstab | grep -v "#" | awk '{print $1,$3}' | grep "$mnt$" | cut -f 1 -d ' ')
opt=$(sed -n ${lnr}p /etc/fstab | awk '{print $4}')
fnd='usrquota\|grpquota\|usrjquota=aquota.user\|grpjquota=aquota.group\|jqfmt=vfsv0'
if [ $(echo $opt | tr ',' '\n' | grep -x $fnd | wc -l) -ne 5 ]; then
	old=$(echo $(echo $opt | tr ',' '\n' | grep -v 'usrquota\|grpquota\|usrjquota=\|grpjquota=\|jqfmt=') | tr ' ' ',')
	new='usrquota,grpquota,usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0'
	sed -i "$lnr s/$opt/$old,$new/" /etc/fstab
	mount -o remount "$mnt"
fi

# Adding v2 group and user quota index
if [ ! -e "$mnt/aquota.user" ] || [ ! -e "$mnt/aquota.group" ]; then
	quotacheck -avcugm > /dev/null 2>&1
fi

# Adding quotacheck on reboot
touch /forcequotacheck

# Adding cron job
echo '#!/bin/bash' > /etc/cron.daily/quotacheck
echo 'touch /forcequotacheck' >> /etc/cron.daily/quotacheck
chmod a+x /etc/cron.daily/quotacheck

# Enabling group and user quota
if [ -n "$(quotaon -pa | grep " $mnt " | grep 'user\|group' | grep 'is off')" ]; then
	quotaon -v $mnt
	check_result $? "quota can't be enabled in $mnt" "$E_DISK"
fi

# Updating hestia.conf value
if [ -z "$(grep DISK_QUOTA $HESTIA/conf/hestia.conf)" ]; then
	echo "DISK_QUOTA='yes'" >> $HESTIA/conf/hestia.conf
else
	sed -i "s/DISK_QUOTA=.*/DISK_QUOTA='yes'/g" $HESTIA/conf/hestia.conf
fi

# Rebuilding user quota
for user in $($BIN/v-list-sys-users plain); do
	$BIN/v-update-user-quota "$user"
done

#----------------------------------------------------------#
#                       Hestia                             #
#----------------------------------------------------------#

# Logging
$BIN/v-log-action "system" "Info" "Plugins" "System Quota enforcement enabled."
log_history "system quota enforcement enabled"
log_event "$OK" "$ARGUMENTS"

exit
