diff options
Diffstat (limited to 'libexec/rc/rc.d/ntpd')
| -rwxr-xr-x | libexec/rc/rc.d/ntpd | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/libexec/rc/rc.d/ntpd b/libexec/rc/rc.d/ntpd new file mode 100755 index 000000000000..e7e42da8acc7 --- /dev/null +++ b/libexec/rc/rc.d/ntpd @@ -0,0 +1,250 @@ +#!/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 $name + +# doesn't make sense to run in a svcj: nojail keyword +ntpd_svcj="NO" + +leapfile_is_disabled() { + # Return true (0) if automatic leapfile handling is disabled. + case "$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" |