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 needfetch"
  19 fetch_cmd="ntpd_fetch_leapfile"
  20 needfetch_cmd="ntpd_needfetch_leapfile"
  21 start_precmd="ntpd_precmd"
  22
  23 load_rc_config $name
  24
  25 ntpd_precmd()
  26 {
  27         rc_flags="-c ${ntpd_config} ${ntpd_flags}"
  28
  29         if checkyesno ntpd_sync_on_start; then
  30                 rc_flags="-g $rc_flags"
  31         fi
  32
  33         ntpd_init_leapfile
  34
  35         if [ ! -f $ntp_db_leapfile ]; then
  36                 ntpd_fetch_leapfile
  37         fi
  38
  39         if [ -z "$ntpd_chrootdir" ]; then
  40                 return 0;
  41         fi
  42
  43         # If running in a chroot cage, ensure that the appropriate files
  44         # exist inside the cage, as well as helper symlinks into the cage
  45         # from outside.
  46         #
  47         # As this is called after the is_running and required_dir checks
  48         # are made in run_rc_command(), we can safely assume ${ntpd_chrootdir}
  49         # exists and ntpd isn't running at this point (unless forcestart
  50         # is used).
  51         #
  52         if [ ! -c "${ntpd_chrootdir}/dev/clockctl" ]; then
  53                 rm -f "${ntpd_chrootdir}/dev/clockctl"
  54                 ( cd /dev ; /bin/pax -rw -pe clockctl "${ntpd_chrootdir}/dev" )
  55         fi
  56         ln -fs "${ntpd_chrootdir}/var/db/ntp.drift" /var/db/ntp.drift
  57         ln -fs "${ntpd_chrootdir}${ntp_tmp_leapfile}" ${ntp_tmp_leapfile}
  58
  59         #       Change run_rc_commands()'s internal copy of $ntpd_flags
  60         #
  61         rc_flags="-u ntpd:ntpd -i ${ntpd_chrootdir} $rc_flags"
  62 }
  63
  64 current_ntp_ts() {
  65         # Seconds between 1900-01-01 and 1970-01-01
  66         # echo $(((70*365+17)*86400))
  67         ntp_to_unix=2208988800
  68
  69         echo $(($(date -u +%s)+$ntp_to_unix))
  70 }
  71
  72 get_ntp_leapfile_ver() {
  73         # Leapfile update date (version number).
  74         expr "$(awk '$1 == "#$" { print $2 }' "$1" 2>/dev/null)" : \
  75                 '^\([1-9][0-9]*\)$' \| 0
  76 }
  77
  78 get_ntp_leapfile_expiry() {
  79         # Leapfile expiry date.
  80         expr "$(awk '$1 == "#@" { print $2 }' "$1" 2>/dev/null)" : \
  81                 '^\([1-9][0-9]*\)$' \| 0
  82 }
  83
  84 ntpd_init_leapfile() {
  85         # Refresh working leapfile with an invalid hash due to
  86         # FreeBSD id header. Ntpd will ignore leapfiles with a
  87         # mismatch hash. The file must be the virgin file from
  88         # the source.
  89         if [ ! -f $ntp_db_leapfile ]; then
  90                 cp -p $ntp_src_leapfile $ntp_db_leapfile
  91         fi
  92 }
  93
  94 ntpd_needfetch_leapfile() {
  95         local ntp_tmp_leapfile rc verbose
  96
  97         if checkyesno ntp_leapfile_fetch_verbose; then
  98                 verbose=echo
  99         else
 100                 verbose=:
 101         fi
 102
 103         ntp_tmp_leapfile="/var/run/ntpd.leap-seconds.list"
 104
 105         ntp_ver_no_src=$(get_ntp_leapfile_ver $ntp_src_leapfile)
 106         ntp_expiry_src=$(get_ntp_leapfile_expiry $ntp_src_leapfile)
 107         ntp_ver_no_db=$(get_ntp_leapfile_ver $ntp_db_leapfile)
 108         ntp_expiry_db=$(get_ntp_leapfile_expiry $ntp_db_leapfile)
 109         $verbose ntp_src_leapfile version is $ntp_ver_no_src
 110         $verbose ntp_db_leapfile version is $ntp_ver_no_db
 111
 112         if [ "$ntp_ver_no_src" -gt "$ntp_ver_no_db" -o \
 113              "$ntp_ver_no_src" -eq "$ntp_ver_no_db" -a \
 114              "$ntp_expiry_src" -gt "$ntp_expiry_db" ]; then
 115                 $verbose replacing $ntp_db_leapfile with $ntp_src_leapfile
 116                 cp -p $ntp_src_leapfile $ntp_db_leapfile
 117                 ntp_ver_no_db=$ntp_ver_no_src
 118         else
 119                 $verbose not replacing $ntp_db_leapfile with $ntp_src_leapfile
 120         fi
 121         ntp_leapfile_expiry_seconds=$((ntp_leapfile_expiry_days*86400))
 122         ntp_leap_expiry=$(get_ntp_leapfile_expiry $ntp_db_leapfile)
 123         ntp_leap_fetch_date=$((ntp_leap_expiry-ntp_leapfile_expiry_seconds))
 124         if [ $(current_ntp_ts) -ge $ntp_leap_fetch_date ]; then
 125                 $verbose Within ntp leapfile expiry limit, initiating fetch
 126                 # Return code 0: ntp leapfile fetch needed
 127                 return 0
 128         fi
 129         # Return code 1: ntp leapfile fetch not needed
 130         return 1
 131 }
 132
 133 ntpd_fetch_leapfile() {
 134         if checkyesno ntp_leapfile_fetch_verbose; then
 135                 verbose=echo
 136         else
 137                 verbose=:
 138         fi
 139
 140         if ntpd_needfetch_leapfile ; then
 141                 for url in $ntp_leapfile_sources ; do
 142                         $verbose fetching $url
 143                         fetch $ntp_leapfile_fetch_opts -o $ntp_tmp_leapfile $url && break
 144                 done
 145                 ntp_ver_no_tmp=$(get_ntp_leapfile_ver $ntp_tmp_leapfile)
 146                 ntp_expiry_tmp=$(get_ntp_leapfile_expiry $ntp_tmp_leapfile)
 147                 if [ "$ntp_ver_no_tmp" -gt "$ntp_ver_no_db" -o \
 148                      "$ntp_ver_no_tmp" -eq "$ntp_ver_no_db" -a \
 149                      "$ntp_expiry_tmp" -gt "$ntp_expiry_db" ]; then
 150                         $verbose using $url as $ntp_db_leapfile
 151                         mv $ntp_tmp_leapfile $ntp_db_leapfile
 152                 else
 153                         $verbose using existing $ntp_db_leapfile
 154                 fi
 155         fi
 156 }
 157
 158 run_rc_command "$1"