0a8083a658
1. Use the leap-seconds version number (update time) to determine whether to update the file or not. 2. If the version numbers of the files is the same, use the later expiry date to determine which file to use. Suggested by: ian@ MFC after: 1 day
131 lines
3.6 KiB
Bash
Executable File
131 lines
3.6 KiB
Bash
Executable File
#!/bin/sh
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#
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# $FreeBSD$
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#
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# PROVIDE: ntpd
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# REQUIRE: DAEMON ntpdate FILESYSTEMS devfs
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# BEFORE: LOGIN
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# KEYWORD: nojail shutdown
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. /etc/rc.subr
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name="ntpd"
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desc="Network Time Protocol daemon"
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rcvar="ntpd_enable"
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command="/usr/sbin/${name}"
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pidfile="/var/run/${name}.pid"
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extra_commands="fetch"
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fetch_cmd="ntpd_fetch_leapfile"
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start_precmd="ntpd_precmd"
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load_rc_config $name
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ntpd_precmd()
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{
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rc_flags="-c ${ntpd_config} ${ntpd_flags}"
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if checkyesno ntpd_sync_on_start; then
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rc_flags="-g $rc_flags"
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fi
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if [ ! -f $ntp_db_leapfile ]; then
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ntpd_fetch_leapfile
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fi
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if [ -z "$ntpd_chrootdir" ]; then
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return 0;
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fi
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# If running in a chroot cage, ensure that the appropriate files
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# exist inside the cage, as well as helper symlinks into the cage
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# from outside.
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#
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# As this is called after the is_running and required_dir checks
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# are made in run_rc_command(), we can safely assume ${ntpd_chrootdir}
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# exists and ntpd isn't running at this point (unless forcestart
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# is used).
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#
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if [ ! -c "${ntpd_chrootdir}/dev/clockctl" ]; then
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rm -f "${ntpd_chrootdir}/dev/clockctl"
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( cd /dev ; /bin/pax -rw -pe clockctl "${ntpd_chrootdir}/dev" )
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fi
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ln -fs "${ntpd_chrootdir}/var/db/ntp.drift" /var/db/ntp.drift
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ln -fs "${ntpd_chrootdir}${ntp_tmp_leapfile}" ${ntp_tmp_leapfile}
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# Change run_rc_commands()'s internal copy of $ntpd_flags
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#
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rc_flags="-u ntpd:ntpd -i ${ntpd_chrootdir} $rc_flags"
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}
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current_ntp_ts() {
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# Seconds between 1900-01-01 and 1970-01-01
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# echo $(((70*365+17)*86400))
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ntp_to_unix=2208988800
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echo $(($(date -u +%s)+$ntp_to_unix))
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}
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get_ntp_leapfile_ver() {
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# Leapfile update date (version number).
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expr "$(awk '$1 == "#$" { print $2 }' "$1" 2>/dev/null)" : \
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'^\([1-9][0-9]*\)$' \| 0
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}
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get_ntp_leapfile_expiry() {
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# Leapfile expiry date.
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expr "$(awk '$1 == "#@" { print $2 }' "$1" 2>/dev/null)" : \
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'^\([1-9][0-9]*\)$' \| 0
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}
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ntpd_fetch_leapfile() {
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local ntp_tmp_leapfile rc verbose
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if checkyesno ntp_leapfile_fetch_verbose; then
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verbose=echo
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else
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verbose=:
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fi
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ntp_tmp_leapfile="/var/run/ntpd.leap-seconds.list"
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ntp_ver_no_src=$(get_ntp_leapfile_ver $ntp_src_leapfile)
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ntp_expiry_src=$(get_ntp_leapfile_expiry $ntp_src_leapfile)
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ntp_ver_no_db=$(get_ntp_leapfile_ver $ntp_db_leapfile)
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ntp_expiry_db=$(get_ntp_leapfile_expiry $ntp_db_leapfile)
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$verbose ntp_src_leapfile version is $ntp_ver_no_src
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$verbose ntp_db_leapfile version is $ntp_ver_no_db
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if [ "$ntp_ver_no_src" -gt "$ntp_ver_no_db" -o \
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"$ntp_ver_no_src" -eq "$ntp_ver_no_db" -a \
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"$ntp_expiry_src" -gt "$ntp_expiry_db" ]; then
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$verbose replacing $ntp_db_leapfile with $ntp_src_leapfile
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cp -p $ntp_src_leapfile $ntp_db_leapfile
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ntp_ver_no_db=$ntp_ver_no_src
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else
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$verbose not replacing $ntp_db_leapfile with $ntp_src_leapfile
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fi
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ntp_leapfile_expiry_seconds=$((ntp_leapfile_expiry_days*86400))
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ntp_leap_expiry=$(get_ntp_leapfile_expiry $ntp_db_leapfile)
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ntp_leap_fetch_date=$((ntp_leap_expiry-ntp_leapfile_expiry_seconds))
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if [ $(current_ntp_ts) -ge $ntp_leap_fetch_date ]; then
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$verbose Within ntp leapfile expiry limit, initiating fetch
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for url in $ntp_leapfile_sources ; do
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$verbose fetching $url
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fetch $ntp_leapfile_fetch_opts -o $ntp_tmp_leapfile $url && break
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done
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ntp_ver_no_tmp=$(get_ntp_leapfile_ver $ntp_tmp_leapfile)
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ntp_expiry_tmp=$(get_ntp_leapfile_expiry $ntp_tmp_leapfile)
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if [ "$ntp_ver_no_tmp" -gt "$ntp_ver_no_db" -o \
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"$ntp_ver_no_tmp" -eq "$ntp_ver_no_db" -a \
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"$ntp_expiry_tmp" -gt "$ntp_expiry_db" ]; then
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$verbose using $url as $ntp_db_leapfile
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mv $ntp_tmp_leapfile $ntp_db_leapfile
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else
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$verbose using existing $ntp_db_leapfile
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fi
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fi
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}
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run_rc_command "$1"
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