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#!/usr/bin/env perl
#-*-perl-*-
# Time configurator. Designed to be architecture- and distribution independent.
#
# Copyright (C) 2000-2001 Ximian, Inc.
#
# Authors: Hans Petter Jansson <hpj@ximian.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Library General Public License as published
# by the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
# Best viewed with 100 columns of width.
# Configuration files affected/used:
#
# /usr/share/zoneinfo/zone.tab
# /etc/ntp.conf
# /etc/ntp/step-tickers
# /etc/localtime
# Running programs affected/used:
#
# date
require "___scriptsdir___/be.pl";
# --- Tool information --- #
$name = "time";
$version = "0.1.0";
$description =<<"end_of_description;";
Configures your system clock, timezone and time server list.
end_of_description;
$progress_max = 365;
# --- System config file locations --- #
# We list each config file type with as many alternate locations as possible.
# They are tried in array order. First found = used.
@ntp_conf_names = ( "/etc/ntp.conf" );
@ntp_step_tickers_names = ( "/etc/ntp/step-tickers" );
@zoneinfo_db_names = ( "/usr/share/zoneinfo/zone.tab", "/usr/local/share/zoneinfo/zone.tab" );
# --- Internal configuration variables --- #
# Configuration is parsed/read to, and printed/written from, these temporary variables.
$cf_year = 0;
$cf_month = 0;
$cf_mday = 0;
$cf_hour = 0;
$cf_minute = 0;
$cf_second = 0;
$cf_timezone = "";
$cf_sync_active = 0;
@cf_servers = ();
# --- Configuration file manipulation --- #
# xntpd style /etc/ntp.conf
#
# <filtered lines>
# server <server>
# <filtered lines>
#
# Exists: Red Hat 6.x
#
# Absent:
sub read_ntp_conf
{
my $ifh;
local *FILE;
# Find the file.
$ifh = be_open_read_from_names(@ntp_conf_names);
if (not $ifh) { return; }
*FILE = $ifh;
# Parse the file.
be_report_info(13, "Reading time server list");
while (<FILE>)
{
@line = split(/[ \n\r\t]+/, $_);
if ($line[0] eq "") { shift(@line); } # Leading whitespace.
if ($line[0] eq "server" && $line[1] ne "127.127.1.0") # Disregard loopback.
{ be_push_unique(\@cf_servers, $line[1]); }
}
}
sub write_ntp_conf
{
my ($ifh, $ofh);
local (*INFILE, *OUTFILE);
my $wrote_servers = 0;
# Find the file.
($ifh, $ofh) = be_open_filter_write_from_names(@ntp_conf_names);
if (not $ofh) { return; } # No point if we can't write.
*INFILE = $ifh; *OUTFILE = $ofh;
# Write the file, preserving as much as possible from INFILE.
be_report_info(11, "Saving time server list");
while (<INFILE>)
{
@line = split(/[ \n\r\t]+/, $_);
if ($line[0] eq "") { shift(@line); } # Leading whitespace.
if ($line[0] eq "server")
{
if ($line[1] eq "127.127.1.0") { print OUTFILE; }
elsif (!$wrote_servers)
{
for $elem (@cf_servers) { print OUTFILE "server $elem\n"; }
$wrote_servers = 1;
}
}
else { print OUTFILE; }
}
if (!$wrote_servers)
{
for $elem (@cf_servers) { print OUTFILE "server $elem\n"; }
$wrote_servers = 1;
}
close(OUTFILE);
if (*INFILE) { close(INFILE); }
}
# Red Hat style /etc/ntp/step-tickers
#
# <server>
# <server>
# ...
#
# This file is used as source for servers from which to sync the system
# clock before xntpd is started. In Red Hat, this is done because xntpd
# refuses to sync the clock if it is too much off.
#
# Exists: Red Hat 6.x
#
# Absent:
sub write_ntp_step_tickers
{
my $ofh;
local *FILE;
# Find the file (it might very well not exist beforehand).
$ofh = be_open_write_from_names(@ntp_step_tickers_names);
if (not $ofh) { return; }
*FILE = $ofh;
# Write the file.
be_report_info(12, "Saving time server preload list");
for $elem (@cf_servers) { print FILE "$elem\n"; }
close(FILE);
}
# Red Hat (?) style /etc/localtime
#
# Copied from /usr/share/zoneinfo/Etc/<match>, if found.
# TODO: Otherwise, we generate it ourselves.
#
# Exists: Red Hat 6.x
#
# Absent:
sub write_localtime
{
my ($tz, $name);
my $zonebase = "/usr/share/zoneinfo/";
be_report_info(10, "Setting timezone");
$tz = "$zonebase$cf_timezone";
if (stat($tz) ne "")
{
# Badly needs fixing & porting.
$name = "/etc/localtime";
(my $fullname = "$prefix/$name") =~ tr/\//\//s; # '//' -> '/'
be_report_info(1, "Writing timezone configuration to \"$fullname\"");
($name = "$prefix/$name") =~ tr/\//\//s; # '//' -> '/'
be_create_path($name);
# Make a backup if the file already exists - if the user specified a prefix,
# it might not.
if (stat($name))
{
# NOTE: Might not work everywhere. Might be unsafe if the user is allowed
# to specify a $name list somehow, in the future.
be_run("cp $name $name.confsave");
}
# Replace the timezone info file.
unlink $name; # Important, since it might be a symlink.
be_run("cp $tz $name");
}
}
# --- XML parsing --- #
# Scan XML from standard input to an internal tree.
sub xml_parse
{
# Scan XML to tree.
$tree = &be_xml_scan;
# Walk the tree recursively and extract configuration parameters.
# This is the top level - find and enter the "networking" tag.
while (@$tree)
{
if ($$tree[0] eq "time") { xml_parse_time($$tree[1]); }
shift @$tree;
shift @$tree;
}
return($tree);
}
# <networking>...</networking>
sub xml_parse_time
{
my $tree = $_[0];
shift @$tree; # Skip attributes.
while (@$tree)
{
if ($$tree[0] eq "year") { $cf_year = be_xml_get_word($$tree[1]); }
elsif ($$tree[0] eq "month") { $cf_month = be_xml_get_word($$tree[1]); }
elsif ($$tree[0] eq "monthday") { $cf_mday = be_xml_get_word($$tree[1]); }
elsif ($$tree[0] eq "hour") { $cf_hour = be_xml_get_word($$tree[1]); }
elsif ($$tree[0] eq "minute") { $cf_minute = be_xml_get_word($$tree[1]); }
elsif ($$tree[0] eq "second") { $cf_second = be_xml_get_word($$tree[1]); }
elsif ($$tree[0] eq "timezone") { $cf_timezone = be_xml_get_word($$tree[1]); }
elsif ($$tree[0] eq "synchronization") { xml_parse_synchronization($$tree[1]); }
shift @$tree;
shift @$tree;
}
}
sub xml_parse_synchronization
{
my $tree = $_[0];
$cf_sync_active = be_read_boolean($$tree[0]->{active});
shift @$tree;
while (@$tree)
{
if ($$tree[0] eq "server") { be_push_unique(\@cf_servers, be_xml_get_word($$tree[1])); }
shift @$tree;
shift @$tree;
}
}
# --- XML printing --- #
sub xml_print
{
print "<?xml version='1.0' encoding='ISO-8859-1' standalone='yes'?>\n";
print "<!DOCTYPE time []>\n\n";
print "<time>\n";
be_xml_enter ();
be_xml_vspace ();
be_xml_print ("<!-- Configuration starts here -->\n");
be_xml_vspace ();
be_xml_print ("<year>$cf_year</year>\n");
be_xml_print ("<month>$cf_month</month>\n");
be_xml_print ("<monthday>$cf_mday</monthday>\n");
be_xml_vspace ();
be_xml_print ("<hour>$cf_hour</hour>\n");
be_xml_print ("<minute>$cf_minute</minute>\n");
be_xml_print ("<second>$cf_second</second>\n");
be_xml_vspace ();
be_xml_print ("<timezone>$cf_timezone</timezone>\n");
be_xml_vspace ();
be_xml_vspace ();
be_xml_print ("<synchronization active='", be_print_boolean_yesno($cf_sync_active), "'>\n");
be_xml_enter ();
for $server (@cf_servers)
{
be_xml_print ("<server>$server</server>\n");
}
be_xml_leave ();
be_xml_print ("</synchronization>\n");
be_xml_vspace ();
be_xml_print ("<!-- End of configuration -->\n");
be_xml_vspace ();
be_xml_leave ();
print "</time>\n";
}
# --- Get (read) config --- #
sub get_zone
{
local *TZLIST;
my $zone;
my $diff_tool;
my $size_search;
my $size_test;
*TZLIST = be_open_read_from_names(@zoneinfo_db_names);
if (not *TZLIST) { return; }
$diff_tool = be_locate_tool("diff");
be_report_info(8, "Scanning timezones");
# Get the filesize for /etc/localtime so that we don't have to execute
# a diff for every file, only for file with the correct size. This speeds
# up loading
$size_search = (stat("/etc/localtime"))[7];
while (<TZLIST>)
{
if (/#/) { next; } # Skip comments.
($d, $d, $zone) = split /[\t ]+/, $_; # Get 3rd column.
chomp $zone; # Remove linefeeds.
# See if this zone file matches the installed one.
be_report_info(9, "Scanning timezones : $zone");
$size_test = (stat("/usr/share/zoneinfo/$zone"))[7];
if ($size_test eq $size_search)
{
if (!system "$diff_tool /usr/share/zoneinfo/$zone /etc/localtime >/dev/null 2>/dev/null")
{
# Found a match.
last;
}
}
$zone = "";
be_print_progress();
}
$cf_timezone = $zone;
close (TZLIST);
}
sub get_time
{
my $datetext;
be_report_info(7, "Querying system clock");
$datetext = `date +%Y.%m.%d.%H:%M.%S.%z`;
($cf_year, $cf_month, $cf_mday, $cf_hour, $cf_minute, $cf_second) =
($datetext =~ /^([0-9]+).([0-9]+).([0-9]+).([0-9]+):([0-9]+).([0-9]+)/);
# TODO: We should fall back to internal Perl functions here.
}
sub check_servers
{
if (-f "/etc/rc.d/init.d/xntpd")
{
if (!system "/etc/rc.d/init.d/xntpd status >/dev/null 2>/dev/null")
{
$cf_sync_active = 1;
be_report_info(2, "Found XNTPD enabled");
}
else
{
$cf_sync_active = 0;
be_report_info(3, "Found XNTPD disabled");
}
}
else
{
be_report_warning(1, "Could not find a way to check XNTPD status");
}
}
sub get
{
get_zone ();
read_ntp_conf (); be_print_progress ();
get_time (); be_print_progress ();
check_servers (); be_print_progress ();
be_end();
xml_print ();
}
# --- Set (write) config --- #
sub set_time
{
be_report_info(6, "Setting system clock");
be_run(sprintf("date %02d%02d%02d%02d%04d.%02d >/dev/null 2>/dev/null",
$cf_month, $cf_mday, $cf_hour, $cf_minute, $cf_year, $cf_second));
}
sub restart_servers
{
if ($cf_sync_active)
{
be_report_info(4, "Restarting XNTPD with new configuration");
be_service_restart(81, "", "xntpd");
}
else
{
be_report_info(5, "Stopping XNTPD");
be_service_disable(15, "", "xntpd");
}
}
sub set
{
xml_parse ();
write_ntp_conf (); be_progress (10);
write_ntp_step_tickers (); be_progress (20);
write_localtime (); be_progress (30);
if ($be_do_immediate)
{
set_time; be_progress (50);
restart_servers; be_progress (80);
}
be_end();
}
# --- Filter config: XML in, XML out --- #
sub filter
{
xml_parse ();
be_end();
xml_print ();
}
# --- Main --- #
be_init($name, $version, $description, @ARGV);
# Do our thing.
if ($be_operation eq "get") { get; }
elsif ($be_operation eq "set") { set; }
elsif ($be_operation eq "filter") { filter; }
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