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.\" $FreeBSD$ 26.Dd July 4, 2009 27.Dt TZSETUP 8 28.Os 29.Sh NAME 30.Nm tzsetup 31.Nd set local timezone 32.Sh SYNOPSIS 33.Nm 34.Op Fl nrs 35.Op Fl C Ar chroot directory 36.Op Ar zoneinfo file | zoneinfo name 37.Sh DESCRIPTION 38The 39.Nm 40utility reads a database of timezone information and presents a menu 41allowing the user to select a specific zone without knowing the details 42of the database layout. 43The selected zone is installed as the system 44default zone. 45The 46.Nm 47utility also determines whether any adjustment is necessary for systems where 48the hardware clock does not keep 49.Tn UTC . 50.Pp 51The following option is available: 52.Bl -tag -offset indent -width Fl 53.It Fl C Ar chroot directory 54Open all files and directories relative to 55.Ar chroot directory . 56.It Fl n 57Do not create or copy files. 58.It Fl r 59Reinstall the zoneinfo file installed last time. The name is obtained from 60.Pa /var/db/zoneinfo . 61.It Fl s 62Skip the initial question about adjusting the clock if not set to 63.Tn UTC . 64.El 65.Pp 66It is possible to short-circuit the menu system by specifying the 67location of a 68.Ar zoneinfo file 69or the name of the 70.Ar zoneinfo name 71on the command line; this is intended mainly for pre-configured installation 72scripts or people who know which zoneinfo they want to install. 73.Sh TIMEZONE DATABASE 74The contents of the timezone database are indexed by 75.Pa /usr/share/zoneinfo/zone.tab . 76This file lists, for each timezone data file, the 77.Tn ISO 783166 territory code, approximate geographical coordinates 79(in 80.Tn ISO 816709 format), 82and location within the territory. 83.Pp 84The maintainers of the database maintain the following policies: 85.Bl -enum -offset indent 86.It 87At least one zone for every country or inhabited geographical territory. 88.It 89One zone for every distinct, documented timezone history since the 90beginning of the 91.Ux 92epoch (January 1, 1970, 93.Tn GMT ) . 94.It 95Each zone is named for the most populous city therein. 96(Where possible, 97the database includes pre-1970 history for its city.) 98.El 99The source code to the database 100.Pq Pa /usr/src/share/zoneinfo/[a-z]* 101contains many additional comments and documentation references for the 102historically minded. 103.Sh FILES 104.Bl -tag -width /usr/share/zoneinfo/zone.tab -compact 105.It Pa /etc/localtime 106current time zone file. 107.It Pa /etc/wall_cmos_clock 108see 109.Xr adjkerntz 8 . 110.It Pa /usr/share/misc/iso3166 111mapping of 112.Tn ISO 1133166 territory codes to names. 114.It Pa /usr/share/zoneinfo 115directory for zoneinfo files. 116.It Pa /usr/share/zoneinfo/zone.tab 117mapping of timezone file to country and location. 118.It Pa /var/db/zoneinfo 119saved name of the timezone file installed last. 120.El 121.Sh EXAMPLES 122Normal usage, to select the right zoneinfo file via the dialog-based 123user interface: 124.Dl # tzsetup 125Install the file 126.Pa /usr/share/zoneinfo/Australia/Sydney : 127.Dl # tzsetup /usr/share/zoneinfo/Australia/Sydney 128Install the zoneinfo file for Australia/Sydney, assumed to be located 129in 130.Pa /usr/share/zoneinfo : 131.Dl # tzsetup Australia/Sydney 132After a reinstall of the zoneinfo files, you can reinstall the 133latest installed zoneinfo file: (as specified in 134.Pa /var/db/zoneinfo ) 135.Dl # tzsetup -r 136.Sh SEE ALSO 137.Xr date 1 , 138.Xr adjtime 2 , 139.Xr ctime 3 , 140.Xr timezone 3 , 141.Xr tzfile 5 , 142.Xr adjkerntz 8 , 143.Xr zdump 8 , 144.Xr zic 8 145.Sh DISCLAIMER 146The representation of certain localities as being associated with certain 147countries and/or territories is for the purposes of identification only, 148and does not imply any endorsement or rejection on the part of the 149.Fx 150Project of the territorial claims of any entity. 151.Sh BUGS 152Programs which are already running when 153.Nm 154creates or updates 155.Pa /etc/localtime 156will not reflect the updated timezone. 157When the system is first configured for a 158.Pf non- Tn UTC 159hardware clock, it is necessary to run 160.Xr adjkerntz 8 161(which normally happens as a part of system startup) in order to update 162the kernel's idea of the correct timezone offset. 163