Could anyone help
Bradley White
bww at acm.org
Wed Dec 29 15:48:02 UTC 1999
> I'd like to produce a list of all the distict beginnings of the new
> millenium - listing the zone and UTC time when they will first see the new
> millenium, e.g.:
>
> Pacific/Chatham Island Dec 31 10:15 UTC
> ....
> Europe/Paris Dec 31 23:00 UTC
> Europe/London Jan 1 00:00 UTC
> ...
> etc..
>
> I'd be really grateful if anyone can help with this, or alternatively point
> me to a list that already exists on the web somewhere.
#!/usr/bin/env perl
use integer;
use strict;
use POSIX qw(mktime strftime tzset);
# set $tzdir and $bogon as you see fit
my $tzdir = '/usr/share/zoneinfo';
my $bogon = '^(right|posix|Etc|SystemV)/|\.tab$'
.'|^(Factory|UTC|localtime)$|^GMT.'
.'|^(..T|.ST\d.DT)$';
my %mill = ();
chdir $tzdir or die "$tzdir: $!\n";
foreach my $zone (`find * -type f -print`) {
chomp $zone; next if $zone =~ m:$bogon:o;
$ENV{'TZ'} = $zone; tzset;
my $when = mktime(0, 0, 0, 1, 0, 2000-1900);
$mill{$when} = [] unless exists $mill{$when};
push @{$mill{$when}}, $zone;
}
foreach my $when (sort { $a <=> $b } keys %mill) {
my %zones = ();
foreach my $zone (@{$mill{$when}}) {
my ($dev, $ino) = stat $zone;
next unless defined $ino;
$zones{"$dev.$ino"} = [] unless exists $zones{"$dev.$ino"};
push @{$zones{"$dev.$ino"}}, $zone;
}
print strftime "%b %d %H:%M UTC\n", gmtime $when;
foreach my $devino (keys %zones) {
print ' 'x4, join('|', sort @{$zones{$devino}}), "\n";
}
}
exit 0;
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