man/man1m/zic.1m

         te
 Copyright (c) 2000, Sun Microsystems, Inc. All Rights Reserved
 Copyright 1989 AT&T
 The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
 You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
 When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
 zic 1M "3 Jan 2006" "SunOS 5.11" "System Administration Commands"
 NAME
zic - time zone compiler
 SYNOPSIS

zic [--version] [-s] [-v] [-l localtime] [-p posixrules]
 [-d directory] [-y yearistype] [filename]...


 DESCRIPTION

zic reads text from the file(s) named on the command line and creates the
time conversion information files specified in this input. If a filename
is '-', the standard input is read.

Input lines are made up of fields. Fields are separated by any number of white
space characters. Leading and trailing white space on input lines is ignored. A
pound sign (#) indicates a comment that extends to the end of the line.
White space characters and pound signs can be enclosed within double quotes
(" ") if they are to be used as part of a field. Any line that is blank
(after comment stripping) is ignored. Non-blank lines are expected to be of one
of three types: rule lines, zone lines, or link lines.
 "Rule"

A rule line has the form:

For example:
Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S


The fields that make up a rule line are:
Rule USA 1969 1973 - Apr lastSun 2:00 1:00 D


NAME

Gives the (arbitrary) name of the set of rules this rule is part of.


FROM

Gives the first year in which the rule applies. The word minimum (or an
abbreviation) means the minimum year with a representable time value. The word
maximum (or an abbreviation) means the maximum year with a representable
time value.


TO

Gives the final year in which the rule applies. In addition to minimum
and maximum (as above), the word only (or an abbreviation) can be
used to repeat the value of the FROM field.


TYPE

Gives the type of year in which the rule applies. If TYPE is:

'-'

The rule applies in all years between FROM and TO, inclusive.


uspres

The rule applies in U.S. Presidential election years.


nonpres

The rule applies in years other than U.S. Presidential election years.


even

The rule applies to even-numbered years.


odd

The rule applies to odd-numbered years.


If TYPE is something else, then zic will attempt to execute the
command
yearistype year type


to check the type of a year: an exit status of 0 means that the year is
of the given type; an exit status of 1 means that the year is not of the
given type. The yearistype command is not currently provided in the
Solaris environment.


IN

Names the month in which the rule takes effect. Month names can be abbreviated.


ON

Gives the day on which the rule takes effect. Recognized forms include:

5

the fifth day of the month


lastSun

The last Sunday in the month


lastMon

The last Monday in the month


Sun>=8

First Sunday on or after the eighth


Sun<=25

Last Sunday on or before the 25th


Names of days of the week can be abbreviated or spelled out in full. Note:
There cannot be spaces within the ON field.


AT

Gives the time of day at which the rule takes effect. Recognized forms include:

2

Time in hours


2:00

Time in hours and minutes


15:00

24-hour format time (for times after noon)


1:28:14

Time in hours, minutes, and seconds, where hour 0 is midnight at the start of
the day and hour 24 is midnight at the end of the day.


Any of these forms can be followed by the letter w if the given time is
local "wall clock" time; s if the given time is local "standard" time; or
u (or g or z) if the given time is universal time. In the
absence of an indicator, wall clock time is assumed.


SAVE

Gives the amount of time to be added to local standard time when the rule is in
effect. This field has the same format as the AT field (without the
w and s suffixes).


LETTER/S

Gives the "variable part" (for example, the "S" or "D" in "EST" or "EDT" of
time zone abbreviations to be used when this rule is in effect. If this field
is '-', the variable part is null.


 "Zone"

A zone line has the form:
Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]


For example:
Zone Australia/SouthWest 9:30 - CST 1992 Mar 15 12:00
 8:30 Aus CST


The fields that make up a zone line are:

NAME

The name of the time zone. This is the name used in creating the time
conversion information file for the zone.


GMTOFF

The amount of time to add to UTC to get standard time in this zone. This
field has the same format as the AT and SAVE fields of rule lines;
begin the field with a minus sign to subtract time from UTC.


RULES/SAVE

The name of the rule(s) that apply in the time zone or, alternately, an amount
of time to add to local standard time. If this field is `-', then
standard time always applies in the time zone.


FORMAT

The format for time zone abbreviations in this time zone. The pair of
characters %s is used to show where the "variable part" of the time zone
abbreviation goes. Alternately, a slash (/) separates standard and daylight
abbreviations.


UNTIL

The time at which the UTC offset or the rule(s) change for a location. It
is specified as a year, a month, a day, and a time of day. The time of day has
the same format as the AT field of rule lines. If this is specified, the
time zone information is generated from the given UTC offset and rule
change until the time specified.
The month, day, and time of day have the same format as the IN, ON, and AT
columns of a rule; trailing columns can be omitted, and default to the earliest
possible value for the missing columns.
The next line must be a "continuation" line. This line has the same form as a
zone line except that the string "Zone" and the name are omitted. The
continuation line places information starting at the time specified as the
UNTIL field in the previous line in the file used by the previous line.
Continuation lines can contain an UNTIL field, just as zone lines do,
indicating that the next line is a further continuation.


 "Link"

A link line has the form:
Link LINK-FROM LINK-TO


For example:
Link Europe/Istanbul Asia/Istanbul


The LINK-FROM field should appear as the NAME field in some zone
line; the LINK-TO field is used as an alternate name for that zone.

Except for continuation lines, lines can appear in any order in the input.
 OPTIONS

--version

Outputs version information and exits.


-d directory

Creates time conversion information files in the directory directory
rather than in the standard directory /usr/share/lib/zoneinfo.


-l localtime

Uses the given time zone as local time localtime. zic acts as if
the file contained a link line of the form:
Link localtime localtime


-p posixrules

Uses the rules of the given time zone posixrules when handling
POSIX-format time zone environment variables. zic acts as if the input
contained a link line of the form:
Link posixrules posixrules


This option is not used by ctime(3C) and mktime(3C) in the Solaris
environment.


-s

Limits time values stored in output files to values that are the same whether
they are taken to be signed or unsigned. You can use this option to generate
SVVS-compatible files.
This option is obsolete and may be removed in a future release.


-v

Complains if a year that appears in a data file is outside the range of years
representable by system time values (0:00:00 a.m. UTC, January
1, 1970, to 3:14:07 a.m. UTC, January 19,
2038). This option also complains if a time of 24:00 (which cannot be
handled by pre-1998 versions of zic) appears in the input.


-y yearistype

Uses the given command yearistype rather than yearistype when
checking year types (see Rules under DESCRIPTION).


 OPERANDS

filename

A file containing input lines that specify the time conversion information
files to be created. If a filename is '-', the standard input
is read.


 FILES

/usr/share/lib/zoneinfo

Standard directory used for created files


/usr/share/lib/zoneinfo/src

Directory containing source files


 ATTRIBUTES

See attributes(5) for descriptions of the following attributes:


ATTRIBUTE TYPEATTRIBUTE VALUE
Interface StabilityCommitted*


* The -s option is obsolete.
 SEE ALSO

time(1), zdump(1M), ctime(3C), mktime(3C),
attributes(5)
 NOTES

For areas with more than two types of local time, you might need to use local
standard time in the AT field of the earliest transition time's rule to
ensure that the earliest transition time recorded in the compiled file is
correct.

If the current timezone file is edited and compiled using the "zic"
command, the changes will only be reflected in any new processes that are
running. The most accurate way to reflect the changes for the whole system
would be a reboot.