1.\" Copyright (c) 1996 Wolfram Schneider <wosch@FreeBSD.org>. Berlin. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD: head/usr.sbin/tzsetup/tzsetup.8 232297 2012-02-29 14:44:42Z emaste $ 26.\" 27.Dd February 14, 2013 28.Dt TZSETUP 8 29.Os 30.Sh NAME 31.Nm tzsetup 32.Nd set local timezone 33.Sh SYNOPSIS 34.Nm 35.Op Fl nrs 36.Op Fl C Ar chroot_directory 37.Op Ar zoneinfo_file | zoneinfo_name 38.Sh DESCRIPTION 39The 40.Nm 41utility reads a database of timezone information and presents a menu 42allowing the user to select a specific zone without knowing the details 43of the database layout. 44The selected zone is installed as the system 45default zone. 46The 47.Nm 48utility also determines whether any adjustment is necessary for systems where 49the hardware clock does not keep 50.Tn UTC . 51.Pp 52The following options are available: 53.Bl -tag -offset indent -width Fl 54.It Fl C Ar chroot_directory 55Open all files and directories relative to 56.Ar chroot_directory . 57.It Fl n 58Do not create or copy files. 59.It Fl r 60Reinstall the zoneinfo file installed last time. 61The name is obtained from 62.Pa /var/db/zoneinfo . 63.It Fl s 64Skip the initial question about adjusting the clock if not set to 65.Tn UTC . 66.El 67.Pp 68It is possible to short-circuit the menu system by specifying the 69location of a 70.Ar zoneinfo_file 71or the name of the 72.Ar zoneinfo_name 73on the command line; this is intended mainly for pre-configured installation 74scripts or people who know which zoneinfo they want to install. 75.Sh TIMEZONE DATABASE 76The contents of the timezone database are indexed by 77.Pa /usr/share/zoneinfo/zone.tab . 78This file lists, for each timezone data file, the 79.Tn ISO 803166 territory code, approximate geographical coordinates 81(in 82.Tn ISO 836709 format), 84and location within the territory. 85.Pp 86The maintainers of the database maintain the following policies: 87.Bl -enum -offset indent 88.It 89At least one zone for every country or inhabited geographical territory. 90.It 91One zone for every distinct, documented timezone history since the 92beginning of the 93.Ux 94epoch (January 1, 1970, 95.Tn GMT ) . 96.It 97Each zone is named for the most populous city therein. 98(Where possible, 99the database includes pre-1970 history for its city.) 100.El 101The source code to the database 102.Pq Pa /usr/src/share/zoneinfo/[a-z]* 103contains many additional comments and documentation references for the 104historically minded. 105.Sh FILES 106.Bl -tag -width ".Pa /usr/share/zoneinfo/zone.tab" -compact 107.It Pa /etc/localtime 108current time zone file 109.It Pa /etc/wall_cmos_clock 110see 111.Xr adjkerntz 8 112.It Pa /usr/share/misc/iso3166 113mapping of 114.Tn ISO 1153166 territory codes to names 116.It Pa /usr/share/zoneinfo 117directory for zoneinfo files 118.It Pa /usr/share/zoneinfo/zone.tab 119mapping of timezone file to country and location 120.It Pa /var/db/zoneinfo 121saved name of the timezone file installed last 122.El 123.Sh EXAMPLES 124Normal usage, to select the right zoneinfo file via the dialog-based 125user interface: 126.Dl tzsetup 127.Pp 128Install the file 129.Pa /usr/share/zoneinfo/Australia/Sydney : 130.Dl "tzsetup /usr/share/zoneinfo/Australia/Sydney" 131.Pp 132Install the zoneinfo file for Australia/Sydney, assumed to be located 133in 134.Pa /usr/share/zoneinfo : 135.Dl "tzsetup Australia/Sydney" 136.Pp 137After a reinstall of the zoneinfo files, you can reinstall the 138latest installed zoneinfo file (as specified in 139.Pa /var/db/zoneinfo ) : 140.Dl "tzsetup -r" 141.Sh SEE ALSO 142.Xr date 1 , 143.Xr adjtime 2 , 144.Xr ctime 3 , 145.Xr tzfile 5 , 146.Xr adjkerntz 8 , 147.Xr zdump 8 , 148.Xr zic 8 149.Sh DISCLAIMER 150The representation of certain localities as being associated with certain 151countries and/or territories is for the purposes of identification only, 152and does not imply any endorsement or rejection on the part of the 153.Dx 154Project of the territorial claims of any entity. 155.Sh BUGS 156Programs which are already running when 157.Nm 158creates or updates 159.Pa /etc/localtime 160will not reflect the updated timezone. 161When the system is first configured for a 162.Pf non- Tn UTC 163hardware clock, it is necessary to run 164.Xr adjkerntz 8 165(which normally happens as a part of system startup) in order to update 166the kernel's idea of the correct timezone offset. 167