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ZIC !!!ZIC NAME SYNOPSIS DESCRIPTION NOTE FILE SEE ALSO ---- !!NAME zic - time zone compiler !!SYNOPSIS __zic__ [[ __-v__ ] [[ __-d__ ''directory'' ] [[ __-l__ ''localtime'' ] [[ __-p__ ''posixrules'' ] [[ __-L__ ''leapsecondfilename'' ] [[ __-s__ ] [[ __-y__ ''command'' ] [[ ''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. These options are available: __-d__ ''directory'' Create time conversion information files in the named directory rather than in the standard directory named below. __-l__ ''timezone'' Use the given time zone as local time. ''Zic'' will act as if the input contained a link line of the form Link ''timezone'' localtime __-p__ ''timezone'' Use the given time zone's rules when handling POSIX-format time zone environment variables. ''Zic'' will act as if the input contained a link line of the form Link ''timezone'' posixrules __-L__ ''leapsecondfilename'' Read leap second information from the file with the given name. If this option is not used, no leap second information appears in output files. __-v__ Complain if a year that appears in a data file is outside the range of years representable by time(2) values. __-s__ Limit time values stored in output files to values that are the same whether they're taken to be signed or unsigned. You can use this option to generate SVVS-compatible files. __-y__ ''command'' Use the given ''command'' rather than __yearistype__ when checking year types (see below). Input lines are made up of fields. Fields are separated from one another by any number of white space characters. Leading and trailing white space on input lines is ignored. An unquoted sharp character (#) in the input introduces a comment which extends to the end of the line the sharp character appears on. White space characters and sharp characters may be enclosed in double quotes ( A rule line has the form Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S For example: Rule US 1967 1973 - Apr lastSun 2:00 1:00 D The fields that make up a rule line are: __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. Any integer year can be supplied; the Gregorian calendar is assumed. The word __minimum__ (or an abbreviation) means the minimum year representable as an integer. The word __maximum__ (or an abbreviation) means the maximum year representable as an integer. Rules can describe times that are not representable as time values, with the unrepresentable times ignored; this allows rules to be portable among hosts with differing time value types. __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. __TYPE__ Gives the type of year in which the rule applies. If __TYPE__ is __-__ then the rule applies in all years between __FROM__ and __TO__ inclusive. If __TYPE__ is something else, then ''zic'' executes the command __yearistype__ ''year type'' to check the type of a year: an exit status of zero is taken to mean that the year is of the given type; an exit status of one is taken to mean that the year is not of the given type. __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. Recognized forms include: 5 the fifth of the month lastSun the last Sunday in the month lastMon the last Monday in the month Sun Names of days of the week may be abbreviated or spelled out in full. Note that there must be no 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 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 (although, of course, the __w__ and __s__ suffixes are not used). __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. A zone line has the form Zone NAME GMTOFF RULES/SAVE FORMAT [[UNTIL] For example: Zone Australia/Adelaide 9:30 Aus CST 1971 Oct 31 2:00 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 if time must be subtracted 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. 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 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 continuation. 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 may appear in any order in the input. Lines in the file that describes leap seconds have the following form: Leap YEAR MONTH DAY HH:MM:SS CORR R/S For example: Leap 1974 Dec 31 23:59:60 + S The __YEAR__, __MONTH__, __DAY__, and __HH:MM:SS__ fields tell when the leap second happened. The __CORR__ field should be ``+'' if a second was added or ``-'' if a second was skipped. The __R/S__ field should be (an abbreviation of) ``Stationary'' if the leap second time given by the other fields should be interpreted as UTC or (an abbreviation of) ``Rolling'' if the leap second time given by the other fields should be interpreted as local wall clock time. !!NOTE For areas with more than two types of local time, you may 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. !!FILE /usr/share/zoneinfo standard directory used for created files !!SEE ALSO ctime(3), zdump(1) ----
3 pages link to
zic(8)
:
Man8z
tzselect(8)
zdump(1)
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