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