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.\"
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25.\" $FreeBSD: head/usr.sbin/tzsetup/tzsetup.8 198255 2009-10-19 21:37:31Z edwin $
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25.\" $FreeBSD: head/usr.sbin/tzsetup/tzsetup.8 198267 2009-10-20 06:54:31Z edwin $ |
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
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34.Op Fl ns
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34.Op Fl nrs |
35.Op Ar zoneinfo file 36.Sh DESCRIPTION 37The 38.Nm 39utility reads a database of timezone information and presents a menu 40allowing the user to select a specific zone without knowing the details 41of the database layout. 42The selected zone is installed as the system 43default zone. 44The 45.Nm 46utility also determines whether any adjustment is necessary for systems where 47the hardware clock does not keep 48.Tn UTC . 49.Pp 50The following option is available: 51.Bl -tag -offset indent -width Fl 52.It Fl n 53Do not create or copy files.
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54.It Fl r 55Reinstall the zoneinfo file installed last time. The name is obtained from 56.Pa /var/db/zoneinfo . |
57.It Fl s 58Skip the initial question about adjusting the clock if not set to 59.Tn UTC . 60.El 61.Pp 62It is possible to short-circuit the menu system by specifying the 63location of a 64.Ar zoneinfo file 65on the command line; this is intended mainly for pre-configured installation 66scripts. 67.Sh TIMEZONE DATABASE 68The contents of the timezone database are indexed by 69.Pa /usr/share/zoneinfo/zone.tab . 70This file lists, for each timezone data file, the 71.Tn ISO 723166 territory code, approximate geographical coordinates 73(in 74.Tn ISO 756709 format), 76and location within the territory. 77.Pp 78The maintainers of the database maintain the following policies: 79.Bl -enum -offset indent 80.It 81At least one zone for every country or inhabited geographical territory. 82.It 83One zone for every distinct, documented timezone history since the 84beginning of the 85.Ux 86epoch (January 1, 1970, 87.Tn GMT ) . 88.It 89Each zone is named for the most populous city therein. 90(Where possible, 91the database includes pre-1970 history for its city.) 92.El 93The source code to the database 94.Pq Pa /usr/src/share/zoneinfo/[a-z]* 95contains many additional comments and documentation references for the 96historically minded. 97.Sh FILES 98.Bl -tag -width /usr/share/zoneinfo/zone.tab -compact 99.It Pa /etc/localtime 100current time zone file 101.It Pa /etc/wall_cmos_clock 102see 103.Xr adjkerntz 8 . 104.It Pa /usr/share/misc/iso3166 105mapping of 106.Tn ISO 1073166 territory codes to names 108.It Pa /usr/share/zoneinfo 109directory for zoneinfo files 110.It Pa /usr/share/zoneinfo/zone.tab 111mapping of timezone file to country and location
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112.It Pa /var/db/zoneinfo 113saved name of the timezone file installed last. |
114.El 115.Sh SEE ALSO 116.Xr date 1 , 117.Xr adjtime 2 , 118.Xr ctime 3 , 119.Xr timezone 3 , 120.Xr tzfile 5 , 121.Xr adjkerntz 8 , 122.Xr zdump 8 , 123.Xr zic 8 124.Sh DISCLAIMER 125The representation of certain localities as being associated with certain 126countries and/or territories is for the purposes of identification only, 127and does not imply any endorsement or rejection on the part of the 128.Fx 129Project of the territorial claims of any entity. 130.Sh BUGS 131Programs which are already running when 132.Nm 133creates or updates 134.Pa /etc/localtime 135will not reflect the updated timezone. 136When the system is first configured for a 137.Pf non- Tn UTC 138hardware clock, it is necessary to run 139.Xr adjkerntz 8 140(which normally happens as a part of system startup) in order to update 141the kernel's idea of the correct timezone offset.
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