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 $name 30 31leapfile_is_disabled() { 32 # Return true (0) if automatic leapfile handling is disabled. 33 case "$ntp_db_leapfile" in 34 [Nn][Oo] | [Nn][Oo][Nn][Ee] ) 35 return 0;; 36 * ) 37 return 1;; 38 esac 39} 40 41can_run_nonroot() 42{ 43 # If the admin set what uid to use, we don't change it. 44 if [ -n "${ntpd_user}" ]; then 45 return 1 46 fi 47 48 # If the admin set any command line options involving files, we 49 # may not be able to access them as user ntpd. 50 case "${rc_flags}" in 51 *-f* | *--driftfile* | *-i* | *--jaildir* | \ 52 *-k* | *--keyfile* | *-l* | *--logfile* | \ 53 *-p* | *--pidfile* | *-s* | *--statsdir* ) 54 return 1;; 55 esac 56 57 # If the admin set any options in ntp.conf involving files, 58 # we may not be able to access them as user ntpd. 59 local fileopts="^[ \t]*crypto|^[ \t]*driftfile|^[ \t]*key|^[ \t]*logfile|^[ \t]*statsdir" 60 grep -E -q "${fileopts}" "${ntpd_config}" && return 1 61 62 # Try to set up the the MAC ntpd policy so ntpd can run with reduced 63 # privileges. Detect whether MAC is compiled into the kernel, load 64 # the policy module if not already present, then check whether the 65 # policy has been disabled via tunable or sysctl. 66 [ -n "$(sysctl -qn security.mac.version)" ] || return 1 67 sysctl -qn security.mac.ntpd >/dev/null || kldload -qn mac_ntpd || return 1 68 [ "$(sysctl -qn security.mac.ntpd.enabled)" == "1" ] || return 1 69 70 # On older existing systems, the ntp dir may by owned by root, change 71 # it to ntpd to give the daemon create/write access to the driftfile. 72 if [ "$(stat -f %u ${_ntp_default_dir})" = "0" ]; then 73 chown ntpd:ntpd "${_ntp_default_dir}" || return 1 74 chmod 0755 "${_ntp_default_dir}" || return 1 75 logger -s -t "rc.d/ntpd" -p daemon.notice \ 76 "${_ntp_default_dir} updated to owner ntpd:ntpd, mode 0755" 77 fi 78 79 # If the driftfile exists in the standard location for older existing 80 # systems, move it into the ntp dir and fix the ownership if we can. 81 if [ -f "${_ntp_old_driftfile}" ] && [ ! -L "${_ntp_old_driftfile}" ]; then 82 mv "${_ntp_old_driftfile}" "${_ntp_default_driftfile}" && 83 chown ntpd:ntpd "${_ntp_default_driftfile}" || return 1 84 logger -s -t "rc.d/ntpd" -p daemon.notice \ 85 "${_ntp_default_driftfile} updated to owner ntpd:ntpd" 86 logger -s -t "rc.d/ntpd" -p daemon.notice \ 87 "${_ntp_old_driftfile} moved to ${_ntp_default_driftfile}" 88 fi 89} 90 91ntpd_precmd() 92{ 93 local driftopt 94 95 # If we can run as a non-root user, switch uid to ntpd and use the 96 # new default location for the driftfile inside the ntpd-owned dir. 97 # Otherwise, figure out what to do about the driftfile option. If set 98 # by the admin, we don't add the option. If the file exists in the old 99 # default location we use that, else we use the new default location. 100 if can_run_nonroot; then 101 _user="ntpd" 102 driftopt="-f ${_ntp_default_driftfile}" 103 elif grep -q "^[ \t]*driftfile" "${ntpd_config}" || 104 [ -n "${rc_flags}" ] && 105 ( [ -z "${rc_flags##*-f*}" ] || 106 [ -z "${rc_flags##*--driftfile*}" ] ); then 107 driftopt="" # admin set the option, we don't need to add it. 108 elif [ -f "${_ntp_old_driftfile}" ]; then 109 driftopt="-f ${_ntp_old_driftfile}" 110 else 111 driftopt="-f ${_ntp_default_driftfile}" 112 fi 113 114 # Set command_args based on the various config vars. 115 command_args="-p ${pidfile} -c ${ntpd_config} ${driftopt}" 116 if checkyesno ntpd_sync_on_start; then 117 command_args="${command_args} -g" 118 fi 119 120 # Make sure the leapfile is ready to use, unless leapfile 121 # handling is disabled. 122 if leapfile_is_disabled; then 123 return 124 fi 125 126 ntpd_init_leapfile 127 if [ ! -f "${ntp_db_leapfile}" ]; then 128 ntpd_fetch_leapfile 129 fi 130} 131 132current_ntp_ts() { 133 # Seconds between 1900-01-01 and 1970-01-01 134 # echo $(((70*365+17)*86400)) 135 ntp_to_unix=2208988800 136 137 echo $(($(date -u +%s)+$ntp_to_unix)) 138} 139 140get_ntp_leapfile_ver() { 141 # Leapfile update date (version number). 142 expr "$(awk '$1 == "#$" { print $2 }' "$1" 2>/dev/null)" : \ 143 '^\([1-9][0-9]*\)$' \| 0 144} 145 146get_ntp_leapfile_expiry() { 147 # Leapfile expiry date. 148 expr "$(awk '$1 == "#@" { print $2 }' "$1" 2>/dev/null)" : \ 149 '^\([1-9][0-9]*\)$' \| 0 150} 151 152ntpd_init_leapfile() { 153 154 if leapfile_is_disabled; then 155 return 156 fi 157 158 # Refresh working leapfile with an invalid hash due to 159 # FreeBSD id header. Ntpd will ignore leapfiles with a 160 # mismatch hash. The file must be the virgin file from 161 # the source. 162 if [ ! -f $ntp_db_leapfile ]; then 163 cp -p $ntp_src_leapfile $ntp_db_leapfile 164 fi 165} 166 167ntpd_needfetch_leapfile() { 168 local rc verbose 169 170 if leapfile_is_disabled; then 171 # Return code 1: ntp leapfile fetch not needed 172 return 1 173 fi 174 175 if checkyesno ntp_leapfile_fetch_verbose; then 176 verbose=echo 177 else 178 verbose=: 179 fi 180 181 ntp_ver_no_src=$(get_ntp_leapfile_ver $ntp_src_leapfile) 182 ntp_expiry_src=$(get_ntp_leapfile_expiry $ntp_src_leapfile) 183 ntp_ver_no_db=$(get_ntp_leapfile_ver $ntp_db_leapfile) 184 ntp_expiry_db=$(get_ntp_leapfile_expiry $ntp_db_leapfile) 185 $verbose ntp_src_leapfile version is $ntp_ver_no_src expires $ntp_expiry_src 186 $verbose ntp_db_leapfile version is $ntp_ver_no_db expires $ntp_expiry_db 187 188 if [ "$ntp_ver_no_src" -gt "$ntp_ver_no_db" -o \ 189 "$ntp_ver_no_src" -eq "$ntp_ver_no_db" -a \ 190 "$ntp_expiry_src" -gt "$ntp_expiry_db" ]; then 191 $verbose replacing $ntp_db_leapfile with $ntp_src_leapfile 192 cp -p $ntp_src_leapfile $ntp_db_leapfile 193 ntp_ver_no_db=$ntp_ver_no_src 194 else 195 $verbose not replacing $ntp_db_leapfile with $ntp_src_leapfile 196 fi 197 ntp_leapfile_expiry_seconds=$((ntp_leapfile_expiry_days*86400)) 198 ntp_leap_expiry=$(get_ntp_leapfile_expiry $ntp_db_leapfile) 199 ntp_leap_fetch_date=$((ntp_leap_expiry-ntp_leapfile_expiry_seconds)) 200 if [ $(current_ntp_ts) -ge $ntp_leap_fetch_date ]; then 201 $verbose Within ntp leapfile expiry limit, initiating fetch 202 # Return code 0: ntp leapfile fetch needed 203 return 0 204 fi 205 # Return code 1: ntp leapfile fetch not needed 206 return 1 207} 208 209ntpd_fetch_leapfile() { 210 211 if leapfile_is_disabled; then 212 return 213 fi 214 215 if checkyesno ntp_leapfile_fetch_verbose; then 216 verbose=echo 217 else 218 verbose=: 219 fi 220 221 if ntpd_needfetch_leapfile ; then 222 for url in $ntp_leapfile_sources ; do 223 $verbose fetching $url 224 fetch $ntp_leapfile_fetch_opts -o $_ntp_tmp_leapfile $url && break 225 done 226 ntp_ver_no_tmp=$(get_ntp_leapfile_ver $_ntp_tmp_leapfile) 227 ntp_expiry_tmp=$(get_ntp_leapfile_expiry $_ntp_tmp_leapfile) 228 if [ "$ntp_expiry_tmp" -gt "$ntp_expiry_db" -o \ 229 "$ntp_expiry_tmp" -eq "$ntp_expiry_db" -a \ 230 "$ntp_ver_no_tmp" -gt "$ntp_ver_no_db" ]; then 231 $verbose using $url as $ntp_db_leapfile 232 mv -f $_ntp_tmp_leapfile $ntp_db_leapfile || 233 $verbose "warning: cannot replace $ntp_db_leapfile (read-only fs?)" 234 else 235 $verbose using existing $ntp_db_leapfile 236 fi 237 fi 238} 239 240run_rc_command "$1" 241