#!/bin/bash
### Copyright 1999-2025. WebPros International GmbH. All rights reserved.
#

#
# Plesk script
#



#default values

### Copyright 1999-2025. WebPros International GmbH. All rights reserved.
# vim:ft=sh
# Usage:  pleskrc <service> <action>
pleskrc()
{
	[ 2 -le $# ] || die "Not enough arguments"

	local service_name=${1//[-.@]/_}
	local action=$2
	local ret=0
	local inten
	shift
	shift

	# Now check redefined functions
	if test "$machine" = "linux" && is_function "${service_name}_${action}_${machine}_${linux_distr}"; then
		"${service_name}_${action}_${machine}_${linux_distr}" "$@"
		return $?
	elif is_function "${service_name}_${action}_${machine}"; then
		"${service_name}_${action}_${machine}" "$@"
		return $?
	elif is_function "${service_name}_${action}"; then
		"${service_name}_${action}" "$@"
		return $?
	fi

	# Not redefined - call default action
	eval "service=\$${service_name}_service"
	[ -n "$service" ] || die "$action $service_name service (Empty service name for '$service_name')"

	if [ "$action" = "name" ]; then
		echo "${service}.service"
		return 0
	fi

	inten="$action service $service"
	pleskrc_is_failure_for_action_ok "$action" || echo_try "$inten"

	if [ -x "/bin/systemctl" -a "$do_upgrade" = "1" -a ! -f "/var/lock/parallels-panel-bootstrapper-running.lock" -a -z "$SYSTEMD_DAEMON_RELOADED" ]; then
		# reload systemd units if requested from an upgrade package script - in case a unit was changed
		/bin/systemctl daemon-reload
		SYSTEMD_DAEMON_RELOADED="yes"
	fi

	service_ctl "$action" "$service" "$service_name"
	ret="$?"

	pleskrc_is_failure_for_action_ok "$action" || {
		if [ "$ret" -eq 0 ]; then
			suc
		else
			if [ -x "/bin/systemctl" ]; then
				p_echo "`/bin/systemctl -l status \"${service}.service\" | awk 'BEGIN {s=0} s==1 {s=2} /^$/ {s=1} s==2 {print}'`"
			fi
			warn "$inten failed"
		fi
	}

	return $ret
}

pleskrc_is_failure_for_action_ok()
{
	local action="$1"
	case "$action" in
		status|exists|is-active|is-enabled|is-failed) return 0 ;;
	esac
	return 1
}

# NOTE:
#	Function service_ctl is just helper for pleskrc().
#	Do not call it directly, use pleskrc()!!!
service_ctl()
{
	local action=$1
	local service=$2
	local service_name=$3

	if [ "$action" != "exists" ]; then
		_service_exec $service exists
		if [ "$?" != "0" ]; then
			p_echo "attempt to ${inten} - service doesn't exist (missing unit file or not executable control script)"
			return 1
		fi
	fi

	case "$action" in
		start)
			pleskrc "$service_name" status || _service_exec "$service" "$action"
			;;
		stop)
			! pleskrc "$service_name" status || _service_exec "$service" "$action"
			;;
		restart)
			if pleskrc "$service_name" status; then
				_service_exec "$service" "$action"
			else
				_service_exec "$service" start
			fi
			;;
		reload)
			! pleskrc "$service_name" status || _service_exec "$service" "$action"
			;;
		status)
			_service_exec "$service" status
			;;
		try-restart)
			if [ -x "/bin/systemctl" ]; then
				_service_exec "$service" "$action"
			else
				! pleskrc "$service_name" status || _service_exec "$service" "restart"
			fi
			;;
		try-reload)
			! pleskrc "$service_name" status || _service_exec "$service" "reload"
			;;
		reload-or-restart)
			if [ -x "/bin/systemctl" ]; then
				_service_exec "$service" "$action"
			elif pleskrc "$service_name" status; then
				_service_exec "$service" "reload"
			else
				_service_exec "$service" "start"
			fi
			;;
		*)
			_service_exec "$service" "$action"
			;;
	esac >> "$product_log"
}

_service_exec()
{
	# Keep in sync with pylibplesk/plesk_service.py
	local service=$1
	local action=$2

	local action_cmd
	local sysvinit_service="/etc/init.d/$service"

	if [ -x "/bin/systemctl" ]; then
		case "${action}" in
			exists)
				if /bin/systemctl cat "$service.service" >/dev/null 2>&1; then
					return 0 # systemd unit
				elif [ -f "/lib/systemd/system/$service.service" ]; then
					/bin/systemctl daemon-reload
					return 0 # systemd unit which exists but was changed and has not been reloaded before
				elif [ -x "$sysvinit_service" ]; then
					return 0 # sysvinit compat
				fi
				return 1 # not found
				;;
			status)
				action="is-active"
				;;
			reload|graceful)
				action='reload-or-try-restart'
				;;
		esac
		/bin/systemctl "$action" "${service}.service"
	else
		warn "Cannot $action $service on this system: no executable /bin/systemctl"
		return 1
	fi
}

is_function()
{
	local type_output=$(type -t "$1")
	test "X${type_output}" = "Xfunction"
}

# echo message to product log, also to console in debug mode
p_echo()
{
    if [ -n "$product_log" ] ; then
        echo "$@" >> "$product_log" 2>&1
    fi
    if [ -n "$PLESK_INSTALLER_DEBUG" -o -n "$PLESK_INSTALLER_VERBOSE" -o -z "$product_log" ] ; then
        echo "$@" >&2
    fi
}

# same as p_echo, but without new line
pnnl_echo()
{
	p_echo -n "$@"
}

int_err()
{
	report_problem "internal" "Internal error: $@"
	exit 1
}

p_see_product_log()
{
	log_is_in_dev "${product_log}" || printf " (see log file: ${product_log})" >&2
}

die()
{
	report_problem "fatal" "ERROR while trying to $@"
	printf "Check the error reason" >&2
	p_see_product_log
	echo ", fix and try again" >&2

	selinux_close

	exit 1
}

simply_die()
{
	report_problem "fatal" "$@"
	exit 1
}

warn()
{
	local inten="$1"

	if [ -n "$PLESK_INSTALLER_DEBUG" -o -n "$PLESK_INSTALLER_VERBOSE" ]; then
		p_echo
		p_echo "WARNING!"
		pnnl_echo "Some problems are found during $inten"
		p_see_product_log
		p_echo
		p_echo "Continue..."
		p_echo
	fi

	report_problem "warning" "Warning: $inten"
}

echo_try()
{
	msg="$*"
	pnnl_echo " Trying to $msg... "
}

suc()
{
	p_echo "done"
}
### Copyright 1999-2025. WebPros International GmbH. All rights reserved.
reexec_with_clean_env()
{
	# Usage: call this function as 'reexec_with_clean_env "$@"' at the start of a script.
	#        Don't use with scripts that require sensitive environment variables.
	#        Don't put the call under any input/output redirection.
	# Purpose: make sure the script is executed with a sane environment.

	local lc="`get_default_locale`"
	export LANG="$lc" LC_MESSAGES="$lc" LC_ALL="$lc"
	export PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
	umask 022

	PLESK_SCRIPT_COMMAND_LINE="$0 $*"
	[ -z "$PLESK_INSTALLER_ENV_CLEANED" ] || { unset PLESK_INSTALLER_ENV_CLEANED; return 0; }
	[ -n "$BASH" ] || exec /bin/bash "$0" "$@"

	# N.B.: the following code requires Bash. On Dash it would cause syntax error upon parse w/o eval.
	eval '
	local extra_vars=()                     # list of variables to preserve
	for var in "${!PLESK_@}"; do            # enumerate all PLESK_* variables
		extra_vars+=("$var=${!var}")
	done
	extra_vars+=("PLESK_INSTALLER_ENV_CLEANED=1")

	# Exec self with clean env except for extra_vars, shell opts, and arguments.
	exec /usr/bin/env -i "${extra_vars[@]}" /bin/bash ${-:+-$-} "$0" "$@" || {
		echo "Failed to reexec self ($0) with clean environment" >&2
		exit 91		# Just some relatively unique error code
	}
	'
}

get_default_locale()
{
	# Note that CentOS 7 typically doesn't have C.UTF-8
	for lc in "C.UTF-8" "en_US.UTF-8" "C"; do
		if [ -z "`LC_ALL=$lc locale 2>&1 >/dev/null`" ]; then
			echo "$lc"
			return 0
		fi
	done
	echo "C"
}

detect_vz()
{
	[ -z "$PLESK_VZ_RESULT" ] || return $PLESK_VZ_RESULT

	PLESK_VZ_RESULT=1
	PLESK_VZ=0
	PLESK_VE_HW_NODE=0
	PLESK_VZ_TYPE=

	local issue_file="/etc/issue"
	local vzcheck_file="/proc/self/status"
	[ -f "$vzcheck_file" ] || return 1

	local env_id=`sed -ne 's|^envID\:[[:space:]]*\([[:digit:]]\+\)$|\1|p' "$vzcheck_file"`
	[ -n "$env_id" ] || return 1
	if [ "$env_id" = "0" ]; then
		# Either VZ/OpenVZ HW node or unjailed CloudLinux
		PLESK_VE_HW_NODE=1
		return 1
	fi

	if grep -q "CloudLinux" "$issue_file" >/dev/null 2>&1 ; then
		return 1
	fi

	if [ -f "/proc/vz/veredir" ]; then
		PLESK_VZ_TYPE="vz"
	elif [ -d "/proc/vz" ]; then
		PLESK_VZ_TYPE="openvz"
	fi

	PLESK_VZ=1
	PLESK_VZ_RESULT=0
	return 0
}

# detects lxc and docker containers
detect_lxc()
{
	[ -z "$PLESK_LXC_RESULT" ] || return $PLESK_LXC_RESULT
	PLESK_LXC_RESULT=1
	PLESK_LXC=0
	if  { [ -f /proc/1/cgroup ] && grep -q 'docker\|lxc' /proc/1/cgroup; } || \
		{ [ -f /proc/1/environ ] && cat /proc/1/environ | tr \\0 \\n | grep -q "container=lxc"; };
	then
		PLESK_LXC_RESULT=0
		PLESK_LXC=1
	fi
	return "$PLESK_LXC_RESULT"
}

problems_log_tail()
{
	[ -f "$product_problems_log" ] || return 0
	{
		tac "$product_problems_log" | awk '/^START/ { exit } { print }' | tac
	} 2>/dev/null
}

product_log_tail()
{
	[ -f "$product_log" ] || return 0
	{
		tac "$product_log" | awk '/^START/ { exit } { print }' | tac
	} 2>/dev/null
}

product_and_problems_log_tail()
{
	product_log_tail
	[ "$product_log" = "$product_problems_log" ] || problems_log_tail
}

log_is_in_dev()
{
	test "${1:0:5}" = "/dev/"
}
### Copyright 1999-2025. WebPros International GmbH. All rights reserved.

get_pid()
{
	local i

	local ex_f="$1"
	local opt="$2"
	local owner="$3"

	local min_num="1"
	local ps_long="ps axuw"

	# Use pidof by default, bug 121868, except for FreeBSD - 140182
	if type pidof >/dev/null 2>&1 && [ "$os" != "BSD" ]; then
		for pid in `pidof -o $$ -o $PPID -o %PPID -x $ex_f`; do
			# Check for owner
			[ "$opt" = "true" -a "$owner" != "`ps -p $pid -o ruser=`" ] && continue
			min_num=$pid
			break
		done
		common_var=$min_num
		return $min_num
	fi

	case "$opt" in
		false)
			for i in `$ps_long | grep $ex_f | grep -v grep | grep -v httpsdctl | grep -v apachectl | awk '{print $2}' -`; do
				min_num=$i
				break
			done
			;;
		true)
			for i in `$ps_long | grep $ex_f | grep -v grep | grep -v httpsdctl | grep -v apachectl | grep "$owner" | awk '{print $2}' -`; do
				min_num=$i
				break
			done
			;;
		*)
			p_echo "get_pid: wrong parameter"
			die "get_pid $ex_f $opt $owner"
			;;
	esac

	common_var=$min_num
	return $min_num
}
### Copyright 1999-2025. WebPros International GmbH. All rights reserved.

construct_report_template()
{
	local severity="${1:-error}"
	local summary="$2"

	local update_ticket="`get_update_ticket`"

	set_error_report_source
	set_error_report_component
	set_error_report_params
	set_error_report_environment

	true construct_report_code construct_report_debug construct_report_message

cat <<-EOL
<?xml version="1.0" encoding="UTF-8" ?>
<error>
  <source>$report_source</source>
  <severity>$severity</severity>
  <datetime>`date --iso-8601=seconds`</datetime>

  <component>$report_component</component>
  <summary><![CDATA[`echo "$summary" | sed -e 's/\]\]>/] ]>/g'`]]></summary>
  <message encoding="base64">`construct_report_message | base64`</message>

  <additional_info>
    <component_params encoding="base64">$report_params</component_params>
    <code encoding="base64">`construct_report_code | base64`</code>
    <debug encoding="base64">`construct_report_debug | base64`</debug>
    <environment encoding="base64">$report_environment</environment>
    <update_ticket>$update_ticket</update_ticket>
  </additional_info>
</error>
EOL
}

construct_report_code()
{
	local call_level=${1:-5}
	local func_level=$[call_level - 1]
	local lineno_func=${BASH_LINENO[ $func_level ]}
	local script_name=${BASH_SOURCE[ $[func_level + 1] ]}

	echo "# Call of ${FUNCNAME[$func_level]}() from ${FUNCNAME[$[func_level + 1]]}() at `readlink -m $script_name`:${BASH_LINENO[$func_level]}"
	head -n $[lineno_func + 4] "$script_name" 2>/dev/null | tail -n 8
}

construct_report_debug()
{
	local call_level=${1:-5}
	call_level=$[call_level-1]

	# Generate calls stack trace.
	for i in `seq $call_level ${#FUNCNAME[@]}`; do
		[ "${FUNCNAME[$i]}" != "main" ] || break

		local func_call="`sed -n -e "${BASH_LINENO[$i]}p" "${BASH_SOURCE[$[i+1]]}" 2>/dev/null |
			sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//'`"
		[ -n "$func_call" -a -z "${func_call##*${FUNCNAME[$i]}*}" ] || func_call="${FUNCNAME[$i]}"
		echo "#$[i - $call_level] `readlink -m ${BASH_SOURCE[$[i+1]]}`(${BASH_LINENO[$i]}): $func_call"
	done
}

construct_report_message()
{
	product_and_problems_log_tail

	echo ""
	if [ -n "$report_context" ]; then
		echo "Context: $report_context"
		echo ""
	fi
	if [ -n "$RP_LOADED_PATCHES" ]; then
		echo "Loaded runtime patches: $RP_LOADED_PATCHES"
		echo ""
	fi
}

# Construct report to send it to our errors tracker
construct_report()
{
	local severity="${1:-error}"
	local summary="$2"

	[ -n "$summary" ] || int_err "Unable to send error report. Some parameters are not defined."

	set_error_report_source
	get_product_versions

	construct_report_template "$severity" "$summary" \
		| $PRODUCT_ROOT_D/admin/bin/send-error-report --version "$product_this_version" $report_source >/dev/null 2>&1
}

# Use this function to report failed actions.
# Typical report should contain
# - reason or problem description (example: file copying failed)
# - how to resolve or investigate problem (example: check file permissions, free disk space)
# - how to re-run action (example: perform specific command, restart bootstrapper script, run installation again)
report_problem()
{
	local severity="${1:-error}"

	# Get first string of error as a summary of report
	shift

	local summary="$1"

	[ -n "$product_problems_log" ] || product_problems_log="/dev/stderr"

	p_echo
	if [ "0$problems_occured" -eq 0 ]; then
		echo "***** $process problem report *****" >> "$product_problems_log" 2>&1
	fi
	for problem_message in "$@"; do
		p_echo "$problem_message"
		if [ "$product_log" != "$product_problems_log" ]; then
			echo "$problem_message" >> "$product_problems_log" 2>&1
		fi
	done
	p_echo

	construct_report "$severity" "$summary"

	[ -n "$PLESK_INSTALLER_DEBUG" -o -n "$PLESK_INSTALLER_VERBOSE" ] || \
		product_log_tail

	problems_occured=1
}

set_error_report_context()
{
	report_context="$*"
}

set_error_report_source()
{
	[ -z "$1" ] || report_source="$1"
	[ -n "$report_source" ] || {
		if [ -n "$PACKAGE_ID" -o -n "$PACKAGE_ACTION" -o -n "$PACKAGE_NAME" -o -n "$PACKAGE_VERSION" ]; then
			report_source="install"
		else
			report_source="backend"
		fi
	}
}

set_error_report_component()
{
	local component="$1"

	if [ "$report_source" = "install" ]; then
		[ -n "$report_component" ] || report_component="$PACKAGE_ID"
		return 0
	fi

	[ -z "$component" ] || report_component="$1"
	[ -n "$report_component" ] || report_component="`basename $0`"
}

set_error_report_params()
{
	if [ "$report_source" = "install" ]; then
		[ -n "$report_params" ] || report_params="`echo "$PACKAGE_ACTION of $PACKAGE_NAME $PACKAGE_VERSION" | base64`"
		return 0
	fi

	[ -z "$*" ] || report_params="`echo "$*" | base64`"
	[ -n "$report_params" ] || report_params="`echo "$PLESK_SCRIPT_COMMAND_LINE" | base64`"
}

detect_virtualization()
{
	detect_vz
	detect_lxc
	local is_docker="`[ -f "/.dockerenv" ] && echo yes || :`"
	local systemd_detect_virt_ct="`/usr/bin/systemd-detect-virt -c 2>/dev/null | grep -v '^none$' || :`"
	local systemd_detect_virt_vm="`/usr/bin/systemd-detect-virt -v 2>/dev/null | grep -v '^none$' || :`"
	local virt_what="`/usr/sbin/virt-what 2>/dev/null | xargs || :`"

	if [ -n "$is_docker" ]; then
		echo "docker $virt_what"
	elif [ "$PLESK_VZ" = "1" ]; then
		echo "${PLESK_VZ_TYPE:-virtuozzo}"
	elif [ "$PLESK_LXC" = "1" ]; then
		echo "lxc $virt_what"
	elif [ -n "$systemd_detect_virt_ct" ]; then
		echo "$systemd_detect_virt_ct $systemd_detect_virt_vm"
	elif [ -n "$virt_what" ]; then
		echo "$virt_what"
	elif [ -n "$systemd_detect_virt_vm" ]; then
		echo "$systemd_detect_virt_vm"
	fi
}

default_error_report_environment()
{
	local virtualization="`detect_virtualization`"

	if [ -n "$virtualization" ]; then
		echo "virtualization: $virtualization"
	fi
}

set_error_report_environment()
{
	[ -z "$*" ] || report_environment="`echo "$*" | base64`"
	[ -n "$report_environment" ] || report_environment="`default_error_report_environment | base64`"
}

get_update_ticket()
{
	[ -r $PRODUCT_ROOT_D/var/update_ticket ] && cat $PRODUCT_ROOT_D/var/update_ticket | awk '{$1=$1};1'
}

selinux_close()
{
	if [ -z "$SELINUX_ENFORCE" -o "$SELINUX_ENFORCE" = "Disabled" ]; then
		return
	fi

	setenforce "$SELINUX_ENFORCE"
}

get_product_versions()
{
	# Don't use global variables set elsewhere in this code. Use substitutions if needed.
	local prod_root_d="/opt/psa"

	product_name="psa"

	if [ -z "$product_this_version" ]; then
		# 1. Try to fetch version from file created by bootstrapper (should be 3-component).
		product_this_version="`cat "/var/lock/plesk-target-version" 2>/dev/null`"
		# 2. Fallback to $PRODUCT_ROOT_D/version (should be 3-component).
		if [ -z "$product_this_version" -a -r "$prod_root_d/version" ]; then
			product_this_version="`awk '{ print $1 }' "$prod_root_d/version"`"
		fi
		# 3. Fallback to hardcoded version (2-component). This may cause some other code to fail.
		if [ -z "$product_this_version" ]; then
			product_this_version="18.0"
			echo "Unable to determine \$product_this_version, will use less precise value '$product_this_version'" >&2
		fi
	fi

	product_version="$product_this_version"

	if [ -z "$product_prev_version" ]; then
		if [ -r "$prod_root_d/version.upg" ]; then
			product_prev_version=`awk '{ print $1 }' "$prod_root_d/version.upg"`
		elif [ -r "$prod_root_d/version" ]; then
			product_prev_version=`awk '{ print $1 }' "$prod_root_d/version"`
		else
			product_prev_version="$product_this_version"
		fi
	fi
}

true exim_status_linux_debian
exim_status_linux_debian()
{
	get_pid /usr/lib/exim/exim3 false
	local pid=$common_var

	if test "$pid" -ne 1; then
		#running
		return 0;
	fi
	return 1
}
### Copyright 1999-2025. WebPros International GmbH. All rights reserved.
# -*- vim:ft=sh

# MySQL service action handlers

###	FIXME: probably need var service_restart warn
true mysql_stop
mysql_stop()
{
	local op_result i

	inten="stop MySQL server"
	echo_try $inten

	service_ctl stop $mysql_service mysql
	op_result=$?

	if [ "X$linux_distr" = "Xdebian" ]; then
		# Debian has well designed mysql stopping code
		[ "$op_result" -eq 0 ] || die $inten
		suc
		return 0
	fi

	for i in 2 4 6 8 16; do
		if ! mysql_status ; then
			suc
			return 0
		fi

		# I just want to be sure that mysql really stopped
		killall -TERM mysqld mysql safe_mysqld mysqld_safe >> $product_log 2>&1

		sleep $i
	done

	die "$inten"
}

true mysql_status
mysql_status()
{
	# Previously this handler also checked for mysqld pid on Debian systems. Should not be needed nowadays.
	service_ctl status $mysql_service mysql
}

true postfix_status
postfix_status()
{
	# here be dragons.
	# the practical experience shows that simple checking of status of
	# Postfix "master" process is not enough. So we read Postfix master
	# process pid file if any, then try to look for a process with
	# name ``qmgr'' and parent pid being equal to
	# the pid read from the pidfile. If pgrep finds such a process
	# it returns 0, if not its exit status is non-zero.
	# pgrep is portable enough to prefer it to "hand-made" alternatives
	# such as famous ``ps | grep $name | grep -v grep...'' pipes
	# bug 147822. do not interrupt installation for FreeBSD

	[ -f "/var/spool/postfix/pid/master.pid" ] || return 1

	local ppid

	read ppid </var/spool/postfix/pid/master.pid 2>/dev/null
	if [ $? -ne 0 -o -z "$ppid" ]; then
		# not found or other error
		return 1;
	fi
	pgrep -P $ppid qmgr >/dev/null 2>/dev/null
}

### Copyright 1999-2025. WebPros International GmbH. All rights reserved.

reexec_with_clean_env "$@"

# constants
PN=`basename $0`

product_log="/dev/stderr"
product_problems_log=
problems_occured=0

set_error_report_context "$PN"

usage()
{
	cat << EOT
Usage: $PN [OPTIONS...] COMMAND

Commands:
    --enable-sync-time            enable network time synchronization
    --disable-sync-time           disable network time synchronization
    --status-sync-time            status of network time synchronization
    --add-server SERVER           add NTP server to service config
    --del-server SERVER           remove NTP server from service config
    --show-servers                show NTP servers in service config

Options:
    --service SERVICE             specify time synchronization service name
                                  unless specified, the time sync service will be selected automatically
EOT
}

get_timesync_service_name()
{
	#On different OS service has name chrony, chronyd, ntp, ntpd
	local service=$(systemctl list-units --type=service --state=loaded --plain --no-legend 2>/dev/null | cut -f1 -d" " | grep -E "chrony|ntp|timesync")

	if [ -z "$service" ]; then
		die "No supported time synchronization services found. Expected either of the following to be installed: chronyd, ntpd, systemd-timesyncd"
	fi

	if [ "$(echo "$service" | wc -l)" -gt 1 ]; then
		die "More than one time synchronization service found $service, please select one service in option --service"
	fi

	opt_service="$service"
}

existing_configs()
{
	for config in "$@"; do
		[ -f "$config" ] && configs="$configs $config"
	done
}

add_ntp_server_timesyncd()
{
	local time_server="$1"
	local config="/lib/systemd/system/timesyncd.conf.d/plesk.conf"
	local dir=$(dirname "$config")
	local template=$(cat << EOF
[Time]
NTP=
EOF
)

	[ -d "$dir" ] || install -m 0755 -d "$dir"
	[ -f "$config" ] || echo "$template" > "$config"

	sed -i -e "/^NTP/ s/$/ $time_server/" "$config"
}

add_ntp_server_chronyd()
{
	local time_server="$1"
	local config="$2"
	
	echo "server $time_server iburst" >> "$config"
}

add_ntp_server_ntpd()
{
	local time_server="$1"
	local config="$2"

	echo "server $time_server iburst" >> "$config"
}

show_ntp_servers_timesyncd()
{
	sed -n -e "s/^NTP=\(.*\)/\1/p" "$@" | grep -o -e "\S*"
}

show_ntp_servers_chronyd()
{
	sed -n -e "s/\(^pool\|^server\)\s\+\(\S*\)\(.*\)/\2/p" "$@"
}

show_ntp_servers_ntpd()
{
	sed -n -e "s/\(^pool\|^server\)\s\+\(\S*\)\(.*\)/\2/p" "$@"
}

delete_ntp_server_timesyncd()
{
	local time_server="$1"
	shift
	sed -i -e "/^NTP/ s/\<$time_server\>//g" "$@"
}

delete_ntp_server_chronyd()
{
	local time_server="$1"
	shift
	sed -i -e "/\(^server\|^pool\)\s\+$time_server\>/d" "$@"
}

delete_ntp_server_ntpd()
{
	local time_server="$1"
	shift
	sed -i -e "/\(^server\|^pool\)\s\+$time_server\>/d" "$@"
}

set_sync_time()
{
	local bool="$1"
	local error=

	error=$(timedatectl set-ntp "$bool" 2>&1 >/dev/null)

	local ret_code="$?"

	if [ "$ret_code" -ne 0 ] ; then
		die "Command 'timedatectl set-ntp $bool' exit with code $ret_code. stderr: $error"
	fi
}

status_sync_time()
{
	local response=
	response=$(dbus-send --system --dest=org.freedesktop.timedate1 --print-reply=literal /org/freedesktop/timedate1 org.freedesktop.DBus.Properties.Get string:org.freedesktop.timedate1 string:NTP 2>&1)

	if [ "$?" -ne 0 ] ; then
		die "Cannot get time synchronization status: dbus-send failed with: $response"
	fi

	if echo "$response" | grep -q "true" ; then
		echo "true"
	else
		echo "false"
	fi
}

restart_service()
{
	local service="$1"
	local service_name=${1//[-.@]/_}
	product_log="/dev/stderr"
	eval "${service_name}_service=${service}"
	pleskrc "$service" restart
}

if [ "$#" -eq 0 ] ; then
    usage
    exit 0
fi

TEMP=`getopt -o 'h' --long enable-sync-time,disable-sync-time,status-sync-time,add-server:,del-server:,show-servers,service:,help -n "$PN" -- "$@"`

if [ "$?" -ne 0 ] ; then simply_die "Internal error: failed to parse command line options." ; fi
eval set -- "$TEMP"

cmd_enable=0
cmd_disable=0
cmd_status=0
cmd_add=""
cmd_del=""
cmd_show=0
opt_service=""

configs=""
add_function=""
del_function=""
show_function=""

while true; do
	case "$1" in
		--enable-sync-time) cmd_enable=1; shift;;
		--disable-sync-time) cmd_disable=1; shift;;
		--status-sync-time) cmd_status=1; shift;;
		--show-servers) cmd_show=1; shift;;
		--add-server) cmd_add="$2"; shift; shift;;
		--del-server) cmd_del="$2"; shift; shift;;
		--service) opt_service="$2"; shift; shift;;
		-h|--help) usage; exit 0;;
		--) shift ; break ;;
		*) die "Unrecognized option: $1";;
	esac
done

if [ "$cmd_enable" -gt 0 ]; then
	set_sync_time "true"
	exit 0
fi

if [ "$cmd_disable" -gt 0 ]; then
	set_sync_time "false"
	exit 0
fi

if [ "$cmd_status" -gt 0 ]; then
	status_sync_time
	exit 0
fi

if [ -z "$opt_service" ]; then
	get_timesync_service_name
fi

case "$opt_service" in
	systemd-timesync*)
		add_function="add_ntp_server_timesyncd"
		del_function="delete_ntp_server_timesyncd"
		show_function="show_ntp_servers_timesyncd"
		config_list="/etc/systemd/timesyncd.conf /lib/systemd/system/timesyncd.conf.d/plesk.conf"
		existing_configs $config_list
	;;

	chrony*)
		add_function="add_ntp_server_chronyd"
		del_function="delete_ntp_server_chronyd"
		show_function="show_ntp_servers_chronyd"
		config_list="/etc/chrony.conf /etc/chrony/chrony.conf"
		existing_configs $config_list
	;;

	ntp*)
		add_function="add_ntp_server_ntpd"
		del_function="delete_ntp_server_ntpd"
		show_function="show_ntp_servers_ntpd"
		config_list="/etc/ntp.conf"
		existing_configs $config_list
	;;

	*)
		die "$PN doesn't support time synchronization service $opt_service. Fix incorrect value of the --service option"
	;;
esac

[ -n "$configs" ] || die "None of the configuration files found: $config_list"

if [ -n "$cmd_add" ]; then
	"$show_function" $configs | grep -e "^$cmd_add\$" -q && echo "Server $cmd_add already exists" && exit 0

	"$add_function" "$cmd_add" $configs
	restart_service "$opt_service"
fi

if [ -n "$cmd_del" ]; then
	"$del_function" "$cmd_del" $configs
	restart_service "$opt_service"
fi

if [ "$cmd_show" -gt 0 ]; then
	"$show_function" $configs
fi