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# Functions for getting and setting the timezone on Linux
use strict;
use warnings;
our $timezones_file = "/usr/share/zoneinfo/zone.tab";
our $currentzone_link = "/etc/localtime";
our $timezones_dir = "/usr/share/zoneinfo";
# list_timezones()
sub list_timezones
{
my @rv;
my $fh = "ZONE";
&open_readfile($fh, $timezones_file) || return ( );
while(<$fh>) {
s/\r|\n//g;
s/^\s*#.*$//;
if (/^(\S+)\s+(\S+)\s+(\S+)\s+(\S.*)/) {
push(@rv, [ $3, $4 ]);
}
elsif (/^(\S+)\s+(\S+)\s+(\S+)/) {
push(@rv, [ $3, undef ]);
}
}
close($fh);
return sort { $a->[0] cmp $b->[0] } @rv;
}
# get_current_timezone()
sub get_current_timezone
{
my $lnk = readlink(&translate_filename($currentzone_link));
if ($lnk) {
# Easy - it a link
$lnk =~ s/$timezones_dir\///;
return $lnk;
}
else {
# Need to compare with all timezone files!
return &find_same_zone($currentzone_link);
}
}
# set_current_timezone(zone)
sub set_current_timezone
{
my ($zone) = @_;
&lock_file($currentzone_link);
unlink(&translate_filename($currentzone_link));
symlink(&translate_filename("$timezones_dir/$zone"),
&translate_filename($currentzone_link));
&unlock_file($currentzone_link);
}
sub os_has_timezones
{
return -r $timezones_file;
}
sub timezone_files
{
return ( $currentzone_link );
}
1;
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