xref: /src/etc/rc.d/ntpd

#!/bin/sh
#
# $NetBSD: ntpd,v 1.17 2020/07/04 06:24:53 skrll Exp $
#

# PROVIDE: ntpd
# REQUIRE: DAEMON
# BEFORE:  LOGIN
# KEYWORD: chrootdir

$_rc_subr_loaded . /etc/rc.subr

name="ntpd"
rcvar=$name
command="/usr/sbin/${name}"
pidfile="/var/run/${name}.pid"
start_precmd="ntpd_precmd"
required_files="/etc/ntp.conf"

ntpd_precmd()
{
	rc_flags="-p ${pidfile} $rc_flags"
	if [ -z "$ntpd_chrootdir" ]; then
		return 0;
	fi

	# If running in a chroot cage, ensure that the appropriate files
	# exist inside the cage, as well as helper symlinks into the cage
	# from outside.
	#
	# As this is called after the is_running and required_dir checks
	# are made in run_rc_command(), we can safely assume ${ntpd_chrootdir}
	# exists and ntpd isn't running at this point (unless forcestart
	# is used).
	#
	# Before enabling ntpd_chrootdir, ensure that:
	#	- The kernel has "pseudo-device clockctl" compiled in
	#	- /dev/clockctl is present
	#
	if (: </dev/clockctl) 2>/dev/null; then
		: exists and works
	else
		logger -s -p daemon.warning -t ntpd \
		    "WARNING: not chrooting -- no working /dev/clockctl device"
		return 0
	fi
	if [ ! -c "${ntpd_chrootdir}/dev/clockctl" ]; then
		rm -f "${ntpd_chrootdir}/dev/clockctl"
		( cd /dev ; /bin/pax -rw -pe clockctl "${ntpd_chrootdir}/dev" )
	fi
	ln -fs "${ntpd_chrootdir}/var/db/ntp.drift" /var/db/ntp.drift

	if [ ! -d "${ntpd_chrootdir}/etc" ]; then
		mkdir "${ntpd_chrootdir}/etc"
	fi

	for f in resolv.conf; do
		if ! cmp -s "/etc/$f" "${ntpd_chrootdir}/etc/$f"; then
			cp -p "/etc/$f" "${ntpd_chrootdir}/etc/$f"
		fi
	done

	if [ ! -f "${ntpd_chrootdir}/etc/services" ]; then
		getent services ntp/udp ntp/tcp \
			> "${ntpd_chrootdir}/etc/services"
	fi
	if [ ! -d "${ntpd_chrootdir}/var/db" ]; then
		mkdir -p "${ntpd_chrootdir}/var/db"
	fi
	if [ ! -f "${ntpd_chrootdir}/var/db/services.cdb" ]; then
		services_mkdb -o "${ntpd_chrootdir}/var/db/services.cdb" \
			"${ntpd_chrootdir}/etc/services"
	fi

	#	Change run_rc_commands()'s internal copy of $ntpd_flags
	#
	rc_flags="-u ntpd:ntpd -i ${ntpd_chrootdir} $rc_flags"
}

load_rc_config $name
run_rc_command "$1"