SunOS man pages : zic (1)
Maintenance Commands zic(1M)
NAME
zic - time zone compiler
SYNOPSIS
zic [ -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 and extends to the end of the line.
White space characters and pound signs may 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) may be used to repeat the
value of the FROM field.
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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 may be abbreviated.
ON Gives the day on which the rule takes effect. Recog-
nized 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
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last Sunday on or before the 25th
Names of days of the week may be abbreviated or
spelled out in full. Note: There can not 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
Any of these forms may 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 suf-
fixes).
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:
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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 GMT 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 if time must be subtracted from GMT.
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.
UNTIL The time at which the GMT 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 GMT offset and rule change until the time
specified.
The next line must be a "continuation" line; this has
the same form as a zone line except that the string
"Zone" and the name are omitted, as the continuation
line will place information starting at the time
specified as the UNTIL field in the previous line in
the file used by the previous line. Continuation lines
may contain an UNTIL field, just as zone lines do,
indicating that the next line is a further continua-
tion.
Link
A link line has the form:
Link LINK-FROM LINK-TO
For example:
Link US/Eastern EST5EDT
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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 may appear in any order
in the input.
OPTIONS
-d directory
Create time conversion information files in the direc-
tory directory rather than in the standard directory
/usr/share/lib/zoneinfo.
-l localtime
Use the given time zone as local time localtime. zic
will act as if the file contained a link line of the
form:
Link localtime localtime
-p posixrules
Use the rules of the given time zone posixrules when
handling POSIX-format time zone environment variables.
zic will act 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 Limit 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.
-v Complain if a year that appears in a data file is out-
side the range of years representable by system time
values (0:00:00 a.m. GMT, January 1, 1970, to 3:14:07
a.m. GMT, January 19, 2038).
-y yearistype
Use the given command yearistype rather than yearis-
type when checking year types (see Rules under
DESCRIPTION).
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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
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | SUNWcsu |
|_____________________________|_____________________________|
SEE ALSO
time(1), zdump(1M), ctime(3C), mktime(3C), attributes(5)
NOTES
For areas with more than two types of local time, you may
need to use local standard time in the AT field of the ear-
liest transition time's rule to ensure that the earliest
transition time recorded in the compiled file is correct.
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