#!/bin/sh
#
#
# PROVIDE: ntpd
# REQUIRE: DAEMON ntpdate FILESYSTEMS devfs
# BEFORE: LOGIN
# KEYWORD: nojail resume shutdown
. /etc/rc.subr
name="ntpd"
desc="Network Time Protocol daemon"
rcvar="ntpd_enable"
command="/usr/sbin/${name}"
extra_commands="fetch needfetch resume"
fetch_cmd="ntpd_fetch_leapfile"
needfetch_cmd="ntpd_needfetch_leapfile"
resume_cmd="ntpd_resume"
start_precmd="ntpd_precmd"
_ntp_tmp_leapfile="/var/run/ntpd.leap-seconds.list"
_ntp_default_dir="/var/db/ntp"
_ntp_default_driftfile="${_ntp_default_dir}/ntpd.drift"
_ntp_old_driftfile="/var/db/ntpd.drift"
pidfile="${_ntp_default_dir}/${name}.pid"
load_rc_config $name
leapfile_is_disabled() {
# Return true (0) if automatic leapfile handling is disabled.
case "$ntp_db_leapfile" in
[Nn][Oo] | [Nn][Oo][Nn][Ee] )
return 0;;
* )
return 1;;
esac
}
can_run_nonroot()
{
# If the admin set what uid to use, we don't change it.
if [ -n "${ntpd_user}" ]; then
return 1
fi
# If the admin set any command line options involving files, we
# may not be able to access them as user ntpd.
case "${rc_flags}" in
*-f* | *--driftfile* | *-i* | *--jaildir* | \
*-k* | *--keyfile* | *-l* | *--logfile* | \
*-p* | *--pidfile* | *-s* | *--statsdir* )
return 1;;
esac
# If the admin set any options in ntp.conf involving files,
# we may not be able to access them as user ntpd.
local fileopts="^[ \t]*crypto|^[ \t]*driftfile|^[ \t]*key|^[ \t]*logfile|^[ \t]*statsdir"
grep -E -q "${fileopts}" "${ntpd_config}" && return 1
# Try to set up the MAC ntpd policy so ntpd can run with reduced
# privileges. Detect whether MAC is compiled into the kernel, load
# the policy module if not already present, then check whether the
# policy has been disabled via tunable or sysctl.
[ -n "$(sysctl -qn security.mac.version)" ] || return 1
sysctl -qn security.mac.ntpd >/dev/null || kldload -qn mac_ntpd || return 1
[ "$(sysctl -qn security.mac.ntpd.enabled)" == "1" ] || return 1
# On older existing systems, the ntp dir may by owned by root, change
# it to ntpd to give the daemon create/write access to the driftfile.
if [ "$(stat -f %u ${_ntp_default_dir})" = "0" ]; then
chown ntpd:ntpd "${_ntp_default_dir}" || return 1
chmod 0755 "${_ntp_default_dir}" || return 1
logger -s -t "rc.d/ntpd" -p daemon.notice \
"${_ntp_default_dir} updated to owner ntpd:ntpd, mode 0755"
fi
# If the driftfile exists in the standard location for older existing
# systems, move it into the ntp dir and fix the ownership if we can.
if [ -f "${_ntp_old_driftfile}" ] && [ ! -L "${_ntp_old_driftfile}" ]; then
mv "${_ntp_old_driftfile}" "${_ntp_default_driftfile}" &&
chown ntpd:ntpd "${_ntp_default_driftfile}" || return 1
logger -s -t "rc.d/ntpd" -p daemon.notice \
"${_ntp_default_driftfile} updated to owner ntpd:ntpd"
logger -s -t "rc.d/ntpd" -p daemon.notice \
"${_ntp_old_driftfile} moved to ${_ntp_default_driftfile}"
fi
}
ntpd_precmd()
{
local driftopt
# If we can run as a non-root user, switch uid to ntpd and use the
# new default location for the driftfile inside the ntpd-owned dir.
# Otherwise, figure out what to do about the driftfile option. If set
# by the admin, we don't add the option. If the file exists in the old
# default location we use that, else we use the new default location.
if can_run_nonroot; then
_user="ntpd"
driftopt="-f ${_ntp_default_driftfile}"
elif grep -q "^[ \t]*driftfile" "${ntpd_config}" ||
[ -n "${rc_flags}" ] &&
( [ -z "${rc_flags##*-f*}" ] ||
[ -z "${rc_flags##*--driftfile*}" ] ); then
driftopt="" # admin set the option, we don't need to add it.
elif [ -f "${_ntp_old_driftfile}" ]; then
driftopt="-f ${_ntp_old_driftfile}"
else
driftopt="-f ${_ntp_default_driftfile}"
fi
# Set command_args based on the various config vars.
command_args="-p ${pidfile} -c ${ntpd_config} ${driftopt}"
if checkyesno ntpd_sync_on_start; then
command_args="${command_args} -g"
fi
# Make sure the leapfile is ready to use, unless leapfile
# handling is disabled.
if leapfile_is_disabled; then
return
fi
ntpd_init_leapfile
if [ ! -f "${ntp_db_leapfile}" ]; then
ntpd_fetch_leapfile
fi
}
current_ntp_ts() {
# Seconds between 1900-01-01 and 1970-01-01
# echo $(((70*365+17)*86400))
ntp_to_unix=2208988800
echo $(($(date -u +%s)+$ntp_to_unix))
}
get_ntp_leapfile_ver() {
# Leapfile update date (version number).
expr "$(awk '$1 == "#$" { print $2 }' "$1" 2>/dev/null)" : \
'^\([1-9][0-9]*\)$' \| 0
}
get_ntp_leapfile_expiry() {
# Leapfile expiry date.
expr "$(awk '$1 == "#@" { print $2 }' "$1" 2>/dev/null)" : \
'^\([1-9][0-9]*\)$' \| 0
}
ntpd_init_leapfile() {
if leapfile_is_disabled; then
return
fi
# Refresh working leapfile with an invalid hash due to
# FreeBSD id header. Ntpd will ignore leapfiles with a
# mismatch hash. The file must be the virgin file from
# the source.
if [ ! -f $ntp_db_leapfile ]; then
cp -p $ntp_src_leapfile $ntp_db_leapfile
fi
}
ntpd_needfetch_leapfile() {
local rc verbose
if leapfile_is_disabled; then
# Return code 1: ntp leapfile fetch not needed
return 1
fi
if checkyesno ntp_leapfile_fetch_verbose; then
verbose=echo
else
verbose=:
fi
ntp_ver_no_src=$(get_ntp_leapfile_ver $ntp_src_leapfile)
ntp_expiry_src=$(get_ntp_leapfile_expiry $ntp_src_leapfile)
ntp_ver_no_db=$(get_ntp_leapfile_ver $ntp_db_leapfile)
ntp_expiry_db=$(get_ntp_leapfile_expiry $ntp_db_leapfile)
$verbose ntp_src_leapfile version is $ntp_ver_no_src expires $ntp_expiry_src
$verbose ntp_db_leapfile version is $ntp_ver_no_db expires $ntp_expiry_db
if [ "$ntp_ver_no_src" -gt "$ntp_ver_no_db" -o \
"$ntp_ver_no_src" -eq "$ntp_ver_no_db" -a \
"$ntp_expiry_src" -gt "$ntp_expiry_db" ]; then
$verbose replacing $ntp_db_leapfile with $ntp_src_leapfile
cp -p $ntp_src_leapfile $ntp_db_leapfile
ntp_ver_no_db=$ntp_ver_no_src
else
$verbose not replacing $ntp_db_leapfile with $ntp_src_leapfile
fi
ntp_leapfile_expiry_seconds=$((ntp_leapfile_expiry_days*86400))
ntp_leap_expiry=$(get_ntp_leapfile_expiry $ntp_db_leapfile)
ntp_leap_fetch_date=$((ntp_leap_expiry-ntp_leapfile_expiry_seconds))
if [ $(current_ntp_ts) -ge $ntp_leap_fetch_date ]; then
$verbose Within ntp leapfile expiry limit, initiating fetch
# Return code 0: ntp leapfile fetch needed
return 0
fi
# Return code 1: ntp leapfile fetch not needed
return 1
}
ntpd_fetch_leapfile() {
if leapfile_is_disabled; then
return
fi
if checkyesno ntp_leapfile_fetch_verbose; then
verbose=echo
else
verbose=:
fi
if ntpd_needfetch_leapfile ; then
for url in $ntp_leapfile_sources ; do
$verbose fetching $url
# Circumvent umask 027 and 077 in login.conf(5)
umask 022
fetch $ntp_leapfile_fetch_opts -o $_ntp_tmp_leapfile $url && break
done
ntp_ver_no_tmp=$(get_ntp_leapfile_ver $_ntp_tmp_leapfile)
ntp_expiry_tmp=$(get_ntp_leapfile_expiry $_ntp_tmp_leapfile)
if [ "$ntp_expiry_tmp" -gt "$ntp_expiry_db" -o \
"$ntp_expiry_tmp" -eq "$ntp_expiry_db" -a \
"$ntp_ver_no_tmp" -gt "$ntp_ver_no_db" ]; then
$verbose using $url as $ntp_db_leapfile
mv -f $_ntp_tmp_leapfile $ntp_db_leapfile ||
$verbose "warning: cannot replace $ntp_db_leapfile (read-only fs?)"
else
$verbose using existing $ntp_db_leapfile
fi
fi
}
ntpd_resume()
{
run_rc_command restart
}
run_rc_command "$1"
plain