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 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
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.
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
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.
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 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
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.
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
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.