#!/sbin/openrc-run
# Copyright 1999-2025 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

name="NGINX"
description="Robust, small and high performance HTTP and reverse proxy server"
description_configtest="Run NGINX's internal config check."
description_upgrade="Upgrade the NGINX binary without losing connections."
description_reload="Reload the NGINX configuration without losing connections."

NGINX_CONFIGFILE=${NGINX_CONFIGFILE:-/etc/nginx/${RC_SVCNAME}.conf}
NGINX_MAXWAITTIME=${NGINX_MAXWAITTIME:-3}

command="/usr/sbin/nginx"
start_stop_daemon_args=${NGINX_SSDARGS:-"--wait 1000"}
pidfile="/run/${RC_SVCNAME}/${RC_SVCNAME}.pid"
user=${NGINX_USER:-nginx}
group=${NGINX_GROUP:-nginx}
retry=${NGINX_TERMTIMEOUT:-"TERM/60/KILL/5"}

extra_commands="configtest"
extra_started_commands="upgrade reload"

depend() {
	use net dns logger netmount
}

start_pre() {
	checkpath -d -m 0755 -o 0:0 "/run/${RC_SVCNAME}"
}

stop_pre() {
	if [ "${RC_CMD}" = "restart" ]; then
		configtest || return 1
	fi
}

reload() {
	ebegin "Refreshing NGINX's configuration"
	start-stop-daemon --signal SIGHUP --pidfile "${pidfile}"
	eend $? "Failed to reload NGINX's configuration, please correct the errors above"
}

upgrade() {
	einfo "Upgrading NGINX"
	configtest || { eerror "Unable to upgrade NGINX: Configuration check failed";
					return 1; }

	einfo "Sending USR2 signal to the old binary"
	start-stop-daemon --signal SIGUSR2 --pidfile "${pidfile}"

	ebegin "Waiting up to ${NGINX_MAXWAITTIME} seconds for NGINX to upgrade"
	local startdate pidfile_found
	pidfile_found=0
	endtime=$(("$(date +%s)" + NGINX_MAXWAITTIME))
	while [ "$(date +%s)" -le "${endtime}" ]; do
		if [ -f "${pidfile}" ] && [ -f "${pidfile}.oldbin" ]; then
			pidfile_found=1
			break
		fi
		sleep 1
	done

	[ "${pidfile_found}" = 1 ]
	if ! eend $?; then
		eerror "NGINX has failed to upgrade in time. This might have been caused either"
		eerror "by a configuration error, uncaught by the configuration check, or, more"
		eerror "likely, by NGINX taking more time to load the configuration than is"
		eerror "allowed by the NGINX_MAXWAITTIME variable"
		eerror "The maximum waiting time can be adjusted by setting the NGINX_MAXWAITTIME"
		eerror "variable to a larger value in /etc/conf.d/nginx"
		return 1
	fi

	einfo "Sending QUIT signal to the old binary"
	start-stop-daemon --signal SIGQUIT --pidfile "${pidfile}.oldbin" ||
		{ eerror "The old NGINX binary may not have been stopped properly: Sending QUIT signal failed";
		return 1; }

	einfo "The upgrade has completed successfuly"
}

configtest() {
	ebegin "Checking NGINX's configuration"
	"${command}" -c "${NGINX_CONFIGFILE}" -t
	if ! eend $?; then
		eerror "Configuration check failed, please correct the errors above"
		return 1
	fi
}