#!/usr/bin/perl
#
#timeset.pl ver2.0 final
#
#A simple enough, yet effecient perl script which
#uses a list defined as @serverlist to set a *nix
#system's time...also added for loop which verifies
#the time server so that dead servers are bypassed
#if none of these servers work chk yo connection ;)
#PLEASE - gimme some feedback...thx
#
################################################
#Charlie Collins (ccollins@pharmacore.com)     # 
#warning: beware of the penguin...AWK!         #
#perlmonks.org   -=PearlJamned=-               #
#yadda, yadda, yadda                           #
#hope this helps someone                       #
#I'm a perl newB so lemme know what I coulda   #
#done better, plz                              #
################################################
                
$synchlists = "rdate -s";
@synchtimeh = ("hwclock", "--hctosys");
@synchtimei = ("hwclock", "--systohc");
@serverlist = ("time.nist.gov",
               "ntp.cmr.gov",
               "tock.usno.navy.mil",
               "tick.usno.navy.mil",
               "time.twc.weather.com",
               "tick.mit.edu",
               "ntp.colby.edu");
$list = @serverlist;
for ($count = 1; $count <= $list;) {
        $ping = @serverlist[$count-1];
        @number[$count-1] = `ping -q -c 1 $ping`;
        print "$count: \n" ;
        print "@number[count-1] \n";
                if (@number[$count-1] eq "") {
                print "\n$ping was not found\n";
                $count++
                }
                else {
                        $count = $list+1; #breaks loop
        }
}
@synchtimes = ($synchlists, $ping);
system(@synchtimes);
system(@synchtimei);
system(@synchtimeh);
               
#feedback please <ccollins@pharmacore.com>               
#the time server I've chosen to use (unless it dies)
#time.nist.gov
#hwclock --systohc --hctosys
#rdate -s time.nist.gov
#serverlist from
http://www.eecis.udel.edu/~mills/ntp/servers.htm
#other info
http://www.bgw.org/tutorials/operating_systems/linux/set_c
ock.php3