etc/rc.d/ntpd

   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
  13 name="ntpd"
  14 desc="Network Time Protocol daemon"
  15 rcvar="ntpd_enable"
  16 command="/usr/sbin/${name}"
  17 pidfile="/var/run/${name}.pid"
  18 extra_commands="fetch"
  19 fetch_cmd="ntpd_fetch_leapfile"
  20 start_precmd="ntpd_precmd"
  21
  22 load_rc_config $name
  23
  24 ntpd_precmd()
  25 {
  26         rc_flags="-c ${ntpd_config} ${ntpd_flags}"
  27
  28         if checkyesno ntpd_sync_on_start; then
  29                 rc_flags="-g $rc_flags"
  30         fi
  31
  32         if [ ! -f $ntp_db_leapfile ]; then
  33                 ntpd_fetch_leapfile
  34         fi
  35
  36         if [ -z "$ntpd_chrootdir" ]; then
  37                 return 0;
  38         fi
  39
  40         # If running in a chroot cage, ensure that the appropriate files
  41         # exist inside the cage, as well as helper symlinks into the cage
  42         # from outside.
  43         #
  44         # As this is called after the is_running and required_dir checks
  45         # are made in run_rc_command(), we can safely assume ${ntpd_chrootdir}
  46         # exists and ntpd isn't running at this point (unless forcestart
  47         # is used).
  48         #
  49         if [ ! -c "${ntpd_chrootdir}/dev/clockctl" ]; then
  50                 rm -f "${ntpd_chrootdir}/dev/clockctl"
  51                 ( cd /dev ; /bin/pax -rw -pe clockctl "${ntpd_chrootdir}/dev" )
  52         fi
  53         ln -fs "${ntpd_chrootdir}/var/db/ntp.drift" /var/db/ntp.drift
  54         ln -fs "${ntpd_chrootdir}${ntp_tmp_leapfile}" ${ntp_tmp_leapfile}
  55
  56         #       Change run_rc_commands()'s internal copy of $ntpd_flags
  57         #
  58         rc_flags="-u ntpd:ntpd -i ${ntpd_chrootdir} $rc_flags"
  59 }
  60
  61 current_ntp_ts() {
  62         # Seconds between 1900-01-01 and 1970-01-01
  63         # echo $(((70*365+17)*86400))
  64         ntp_to_unix=2208988800
  65
  66         echo $(($(date -u +%s)+$ntp_to_unix))
  67 }
  68
  69 get_ntp_leapfile_ver() {
  70         expr "$(awk '$1 == "#$" { print $2 }' "$1" 2>/dev/null)" : \
  71                 '^\([1-9][0-9]*\)$' \| 0
  72 }
  73
  74 get_ntp_leapfile_expiry() {
  75         expr "$(awk '$1 == "#@" { print $2 }' "$1" 2>/dev/null)" : \
  76                 '^\([1-9][0-9]*\)$' \| 0
  77 }
  78
  79 ntpd_fetch_leapfile() {
  80         local ntp_tmp_leapfile rc verbose
  81
  82         if checkyesno ntp_leapfile_fetch_verbose; then
  83                 verbose=echo
  84         else
  85                 verbose=:
  86         fi
  87
  88         ntp_tmp_leapfile="/var/run/ntpd.leap-seconds.list"
  89
  90         ntp_ver_no_src=$(get_ntp_leapfile_ver $ntp_src_leapfile)
  91         ntp_ver_no_db=$(get_ntp_leapfile_ver $ntp_db_leapfile)
  92         $verbose ntp_src_leapfile version is $ntp_ver_no_src
  93         $verbose ntp_db_leapfile version is $ntp_ver_no_db
  94
  95         if [ "$ntp_ver_no_src" -gt "$ntp_ver_no_db" ]; then
  96                 $verbose replacing $ntp_db_leapfile with $ntp_src_leapfile
  97                 cp -p $ntp_src_leapfile $ntp_db_leapfile
  98                 ntp_ver_no_db=$ntp_ver_no_src
  99         else
 100                 $verbose not replacing $ntp_db_leapfile with $ntp_src_leapfile
 101         fi
 102         ntp_leap_expiry=$(get_ntp_leapfile_expiry $ntp_db_leapfile)
 103         ntp_leapfile_expiry_seconds=$((ntp_leapfile_expiry_days*86400))
 104         ntp_leap_fetch_date=$((ntp_leap_expiry-ntp_leapfile_expiry_seconds))
 105         if [ $(current_ntp_ts) -ge $ntp_leap_fetch_date ]; then
 106                 $verbose Within ntp leapfile expiry limit, initiating fetch
 107                 for url in $ntp_leapfile_sources ; do
 108                         $verbose fetching $url
 109                         fetch $ntp_leapfile_fetch_opts -o $ntp_tmp_leapfile $url && break
 110                 done
 111                 ntp_expiry_tmp=$(get_ntp_leapfile_expiry $ntp_tmp_leapfile)
 112                 if [ "$ntp_expiry_tmp" -gt "$ntp_leap_expiry" ]; then
 113                         $verbose using $url as $ntp_db_leapfile
 114                         mv $ntp_tmp_leapfile $ntp_db_leapfile
 115                 else
 116                         $verbose using existing $ntp_db_leapfile
 117                 fi
 118         fi
 119 }
 120
 121 run_rc_command "$1"