1#!/bin/sh 2# 3# $FreeBSD$ 4# 5 6# PROVIDE: ntpd 7# REQUIRE: DAEMON ntpdate FILESYSTEMS devfs 8# BEFORE: LOGIN 9# KEYWORD: nojail shutdown 10 11. /etc/rc.subr 12 13name="ntpd" 14desc="Network Time Protocol daemon" 15rcvar="ntpd_enable" 16command="/usr/sbin/${name}" 17extra_commands="fetch needfetch" 18fetch_cmd="ntpd_fetch_leapfile" 19needfetch_cmd="ntpd_needfetch_leapfile" 20start_precmd="ntpd_precmd" 21 22_ntp_tmp_leapfile="/var/run/ntpd.leap-seconds.list" 23_ntp_default_dir="/var/db/ntp" 24_ntp_default_driftfile="${_ntp_default_dir}/ntpd.drift" 25_ntp_old_driftfile="/var/db/ntpd.drift" 26 27pidfile="${_ntp_default_dir}/${name}.pid" 28 29load_rc_config $name 30 31can_run_nonroot() 32{ 33 # If the admin set what uid to use, we don't change it. 34 if [ -n "${ntpd_user}" ]; then 35 return 1 36 fi 37 38 # If the admin set any command line options involving files, we 39 # may not be able to access them as user ntpd. 40 case "${rc_flags}" in 41 *-f* | *--driftfile* | *-i* | *--jaildir* | \ 42 *-k* | *--keyfile* | *-l* | *--logfile* | \ 43 *-p* | *--pidfile* | *-s* | *--statsdir* ) 44 return 1;; 45 esac 46 47 # If the admin set any options in ntp.conf involving files, 48 # we may not be able to access them as user ntpd. 49 local fileopts="^[ \t]*crypto|^[ \t]*driftfile|^[ \t]*key|^[ \t]*logfile|^[ \t]*statsdir" 50 grep -E -q "${fileopts}" "${ntpd_config}" && return 1 51 52 # Try to set up the the MAC ntpd policy so ntpd can run with reduced 53 # privileges. Detect whether MAC is compiled into the kernel, load 54 # the policy module if not already present, then check whether the 55 # policy has been disabled via tunable or sysctl. 56 [ -n "$(sysctl -qn security.mac.version)" ] || return 1 57 sysctl -qn security.mac.ntpd >/dev/null || kldload -qn mac_ntpd || return 1 58 [ "$(sysctl -qn security.mac.ntpd.enabled)" == "1" ] || return 1 59 60 # On older existing systems, the ntp dir may by owned by root, change 61 # it to ntpd to give the daemon create/write access to the driftfile. 62 if [ "$(stat -f %u ${_ntp_default_dir})" = "0" ]; then 63 chown ntpd:ntpd "${_ntp_default_dir}" || return 1 64 chmod 0755 "${_ntp_default_dir}" || return 1 65 logger -s -t "rc.d/ntpd" -p daemon.notice \ 66 "${_ntp_default_dir} updated to owner ntpd:ntpd, mode 0755" 67 fi 68 69 # If the driftfile exists in the standard location for older existing 70 # systems, move it into the ntp dir and fix the ownership if we can. 71 if [ -f "${_ntp_old_driftfile}" ] && [ ! -L "${_ntp_old_driftfile}" ]; then 72 mv "${_ntp_old_driftfile}" "${_ntp_default_driftfile}" && 73 chown ntpd:ntpd "${_ntp_default_driftfile}" || return 1 74 logger -s -t "rc.d/ntpd" -p daemon.notice \ 75 "${_ntp_default_driftfile} updated to owner ntpd:ntpd" 76 logger -s -t "rc.d/ntpd" -p daemon.notice \ 77 "${_ntp_old_driftfile} moved to ${_ntp_default_driftfile}" 78 fi 79} 80 81ntpd_precmd() 82{ 83 local driftopt 84 85 # If we can run as a non-root user, switch uid to ntpd and use the 86 # new default location for the driftfile inside the ntpd-owned dir. 87 # Otherwise, figure out what to do about the driftfile option. If set 88 # by the admin, we don't add the option. If the file exists in the old 89 # default location we use that, else we use the new default location. 90 91 if can_run_nonroot; then 92 _user="ntpd" 93 driftopt="-f ${_ntp_default_driftfile}" 94 elif grep -q "^[ \t]*driftfile" "${ntpd_config}" || 95 [ -n "${rc_flags}" ] && 96 ( [ -z "${rc_flags##*-f*}" ] || 97 [ -z "${rc_flags##*--driftfile*}" ] ); then 98 driftopt="" # admin set the option, we don't need to add it. 99 elif [ -f "${_ntp_old_driftfile}" ]; then 100 driftopt="-f ${_ntp_old_driftfile}" 101 else 102 driftopt="-f ${_ntp_default_driftfile}" 103 fi 104 105 # Set command_args based on the various config vars. 106 command_args="-p ${pidfile} -c ${ntpd_config} ${driftopt}" 107 if checkyesno ntpd_sync_on_start; then 108 command_args="${command_args} -g" 109 fi 110 111 # Make sure the leapfile is ready to use. 112 ntpd_init_leapfile 113 if [ ! -f "${ntp_db_leapfile}" ]; then 114 ntpd_fetch_leapfile 115 fi 116} 117 118current_ntp_ts() { 119 # Seconds between 1900-01-01 and 1970-01-01 120 # echo $(((70*365+17)*86400)) 121 ntp_to_unix=2208988800 122 123 echo $(($(date -u +%s)+$ntp_to_unix)) 124} 125 126get_ntp_leapfile_ver() { 127 # Leapfile update date (version number). 128 expr "$(awk '$1 == "#$" { print $2 }' "$1" 2>/dev/null)" : \ 129 '^\([1-9][0-9]*\)$' \| 0 130} 131 132get_ntp_leapfile_expiry() { 133 # Leapfile expiry date. 134 expr "$(awk '$1 == "#@" { print $2 }' "$1" 2>/dev/null)" : \ 135 '^\([1-9][0-9]*\)$' \| 0 136} 137 138ntpd_init_leapfile() { 139 # Refresh working leapfile with an invalid hash due to 140 # FreeBSD id header. Ntpd will ignore leapfiles with a 141 # mismatch hash. The file must be the virgin file from 142 # the source. 143 if [ ! -f $ntp_db_leapfile ]; then 144 cp -p $ntp_src_leapfile $ntp_db_leapfile 145 fi 146} 147 148ntpd_needfetch_leapfile() { 149 local rc verbose 150 151 if checkyesno ntp_leapfile_fetch_verbose; then 152 verbose=echo 153 else 154 verbose=: 155 fi 156 157 ntp_ver_no_src=$(get_ntp_leapfile_ver $ntp_src_leapfile) 158 ntp_expiry_src=$(get_ntp_leapfile_expiry $ntp_src_leapfile) 159 ntp_ver_no_db=$(get_ntp_leapfile_ver $ntp_db_leapfile) 160 ntp_expiry_db=$(get_ntp_leapfile_expiry $ntp_db_leapfile) 161 $verbose ntp_src_leapfile version is $ntp_ver_no_src expires $ntp_expiry_src 162 $verbose ntp_db_leapfile version is $ntp_ver_no_db expires $ntp_expiry_db 163 164 if [ "$ntp_ver_no_src" -gt "$ntp_ver_no_db" -o \ 165 "$ntp_ver_no_src" -eq "$ntp_ver_no_db" -a \ 166 "$ntp_expiry_src" -gt "$ntp_expiry_db" ]; then 167 $verbose replacing $ntp_db_leapfile with $ntp_src_leapfile 168 cp -p $ntp_src_leapfile $ntp_db_leapfile 169 ntp_ver_no_db=$ntp_ver_no_src 170 else 171 $verbose not replacing $ntp_db_leapfile with $ntp_src_leapfile 172 fi 173 ntp_leapfile_expiry_seconds=$((ntp_leapfile_expiry_days*86400)) 174 ntp_leap_expiry=$(get_ntp_leapfile_expiry $ntp_db_leapfile) 175 ntp_leap_fetch_date=$((ntp_leap_expiry-ntp_leapfile_expiry_seconds)) 176 if [ $(current_ntp_ts) -ge $ntp_leap_fetch_date ]; then 177 $verbose Within ntp leapfile expiry limit, initiating fetch 178 # Return code 0: ntp leapfile fetch needed 179 return 0 180 fi 181 # Return code 1: ntp leapfile fetch not needed 182 return 1 183} 184 185ntpd_fetch_leapfile() { 186 if checkyesno ntp_leapfile_fetch_verbose; then 187 verbose=echo 188 else 189 verbose=: 190 fi 191 192 if ntpd_needfetch_leapfile ; then 193 for url in $ntp_leapfile_sources ; do 194 $verbose fetching $url 195 fetch $ntp_leapfile_fetch_opts -o $_ntp_tmp_leapfile $url && break 196 done 197 ntp_ver_no_tmp=$(get_ntp_leapfile_ver $_ntp_tmp_leapfile) 198 ntp_expiry_tmp=$(get_ntp_leapfile_expiry $_ntp_tmp_leapfile) 199 if [ "$ntp_expiry_tmp" -gt "$ntp_expiry_db" -o \ 200 "$ntp_expiry_tmp" -eq "$ntp_expiry_db" -a \ 201 "$ntp_ver_no_tmp" -gt "$ntp_ver_no_db" ]; then 202 $verbose using $url as $ntp_db_leapfile 203 mv -f $_ntp_tmp_leapfile $ntp_db_leapfile || 204 $verbose "warning: cannot replace $ntp_db_leapfile (read-only fs?)" 205 else 206 $verbose using existing $ntp_db_leapfile 207 fi 208 fi 209} 210 211run_rc_command "$1" 212