ntp/ntpdate-wrapper

   1 #!/bin/bash
   2
   3 ntpconf=/etc/ntp.conf
   4 ntpstep=/etc/ntp/step-tickers
   5
   6 [ "$EUID" != "0" ] && exit 4
   7 [ -x /usr/sbin/ntpdate ] || exit 5
   8 [ -f /etc/sysconfig/ntpdate ] || exit 6
   9 . /etc/sysconfig/ntpdate
  10
  11 [ -f $ntpstep ] && tickers=$(sed 's/#.*//' $ntpstep) || tickers=
  12
  13 if ! echo "$tickers" | grep -qi '[a-z0-9]' && [ -f $ntpconf ]; then
  14         # the step-tickers file doesn't specify a server,
  15         # use servers from ntp.conf instead
  16         tickers=$(awk '$1=="peer"||$1=="server"{print $2}' $ntpconf | \
  17                 grep -Ev '127\.127\.[0-9]+\.[0-9]+')
  18 fi
  19
  20 if ! echo "$tickers" | grep -qi '[a-z0-9]'; then
  21         echo "NTP server not specified in $ntpstep or $ntpconf"
  22         exit 6
  23 fi
  24
  25 [ -z "$RETRIES" ] && RETRIES=2
  26 retry=0
  27 while true; do
  28         /usr/sbin/ntpdate -U ntp -s -b $OPTIONS $tickers &> /dev/null
  29         RETVAL=$?
  30         [ $RETVAL -eq 0 ] || [ $retry -ge "$RETRIES" ] && break
  31         sleep $[10 * (1 << $retry)]
  32         retry=$[$retry + 1]
  33 done
  34
  35 [ $RETVAL -eq 0 ] && [ "$SYNC_HWCLOCK" = "yes" ] && /sbin/hwclock --systohc
  36 exit $RETVAL