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Diffstat (limited to 'usr.sbin/zic/zic.8')
| -rw-r--r-- | usr.sbin/zic/zic.8 | 465 |
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diff --git a/usr.sbin/zic/zic.8 b/usr.sbin/zic/zic.8 deleted file mode 100644 index f7ff815b..0000000 --- a/usr.sbin/zic/zic.8 +++ /dev/null @@ -1,465 +0,0 @@ -.\" $FreeBSD$ -.Dd June 20, 2004 -.Dt ZIC 8 -.Os -.Sh NAME -.Nm zic -.Nd timezone compiler -.Sh SYNOPSIS -.Nm -.Op Fl -version -.Op Fl Dsv -.Op Fl d Ar directory -.Op Fl g Ar group -.Op Fl L Ar leapsecondfilename -.Op Fl l Ar localtime -.Op Fl m Ar mode -.Op Fl p Ar posixrules -.Op Fl u Ar user -.Op Fl y Ar command -.Op Ar filename ... -.Sh DESCRIPTION -The -.Nm -utility reads text from the file(s) named on the command line -and creates the time conversion information files specified in this input. -If a -.Ar filename -is -.Em - , -the standard input is read. -.Pp -The following options are available: -.Bl -tag -width indent -.It Fl -version -Output version information and exit. -.It Fl D -Do not automatically create directories. -If the input file(s) specify -an output file in a directory which does not already exist, the -default behavior is to attempt to create the directory. -If -.Fl D -is specified, -.Nm -will instead error out immediately. -.It Fl d Ar directory -Create time conversion information files in the named directory rather than -in the standard directory named below. -.It Fl g Ar group -After creating each output file, change its group ownership to the -specified -.Ar group -(which can be either a name or a numeric group ID). -.It Fl L Ar 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. -.It Fl l Ar timezone -Use the given -.Ar time zone -as local time. -The -.Nm -utility will act as if the input contained a link line of the form -.Pp -.D1 No "Link timezone localtime" -.Pp -(Note that this action has no effect on -.Fx , -since the local time zone is specified in -.Pa /etc/localtime -and not -.Pa /usr/share/zoneinfo/localtime . ) -.It Fl m Ar mode -After creating each output file, change its access mode to -.Ar mode . -Both numeric and alphabetic modes are accepted -(see -.Xr chmod 1 ) . -.It Fl p Ar timezone -Use the given -.Ar "time zone" Ns 's -rules when handling POSIX-format -time zone environment variables. -The -.Nm -utility will act as if the input contained a link line of the form -.Pp -.D1 No "Link timezone posixrules" -.It Fl u Ar user -After creating each output file, change its owner to -.Ar user -(which can be either a name or a numeric user ID). -.It Fl v -Complain if a year that appears in a data file is outside the range -of years representable by -.Xr time 3 -values. -.It Fl 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. -.It Fl y Ar command -Use the given -.Ar command -rather than -.Em yearistype -when checking year types (see below). -.El -.Pp -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 -(") 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, and link lines. -.Pp -A rule line has the form: -.Dl "Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -For example: -.Dl "Rule US 1967 1973 \- Apr lastSun 2:00 1:00 D -.Pp -The fields that make up a rule line are: -.Bl -tag -width "LETTER/S" -offset indent -.It NAME -Give the (arbitrary) name of the set of rules this rule is part of. -.It FROM -Give the first year in which the rule applies. -Any integer year can be supplied; the Gregorian calendar is assumed. -The word -.Em minimum -(or an abbreviation) means the minimum year representable as an integer. -The word -.Em 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. -.It TO -Give the final year in which the rule applies. -In addition to -.Em minimum -and -.Em maximum -(as above), -the word -.Em only -(or an abbreviation) -may be used to repeat the value of the -.Em FROM -field. -.It TYPE -Give the type of year in which the rule applies. -If -.Em TYPE -is -.Em \- -then the rule applies in all years between -.Em FROM -and -.Em TO -inclusive. -If -.Em TYPE -is something else, then -.Nm -executes the command -.Li yearistype Ar year Ar 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. -.It IN -Name the month in which the rule takes effect. -Month names may be abbreviated. -.It ON -Give the day on which the rule takes effect. -Recognized forms include: -.Pp -.Bl -tag -width lastSun -compact -offset indent -.It \&5 -the fifth of the month -.It lastSun -the last Sunday in the month -.It lastMon -the last Monday in the month -.It Sun>=8 -first Sunday on or after the eighth -.It Sun<=25 -last Sunday on or before the 25th -.El -.Pp -Names of days of the week may be abbreviated or spelled out in full. -Note that there must be no spaces within the -.Em ON -field. -.It AT -Give the time of day at which the rule takes effect. -Recognized forms include: -.Pp -.Bl -tag -width "\&1:28:14" -offset indent -compact -.It 2 -time in hours -.It 2:00 -time in hours and minutes -.It 15:00 -24-hour format time (for times after noon) -.It 1:28:14 -time in hours, minutes, and seconds -.El -.Pp -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 -.Sq Li w -if the given time is local -.Dq "wall clock" -time, -.Sq Li s -if the given time is local -.Dq standard -time, or -.Sq Li u -(or -.Sq Li g -or -.Sq Li z ) -if the given time is universal time; -in the absence of an indicator, -wall clock time is assumed. -.It SAVE -Give 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 -.Em AT -field -(although, of course, the -.Sq Li w -and -.Sq Li s -suffixes are not used). -.It LETTER/S -Give the -.Dq "variable part" -(for example, the -.Dq S -or -.Dq D -in -.Dq EST -or -.Dq EDT ) -of time zone abbreviations to be used when this rule is in effect. -If this field is -.Em \- , -the variable part is null. -.El -.Pp -A zone line has the form: -.Dl "Zone NAME GMTOFF RULES/SAVE FORMAT [UNTILYEAR [MONTH [DAY [TIME]]]]" -For example: -.Dl "Zone Australia/Adelaide 9:30 Aus CST 1971 Oct 31 2:00 -The fields that make up a zone line are: -.Bl -tag -width indent -.It NAME -The name of the time zone. -This is the name used in creating the time conversion information file for the -zone. -.It GMTOFF -The amount of time to add to UTC to get standard time in this zone. -This field has the same format as the -.Em AT -and -.Em SAVE -fields of rule lines; -begin the field with a minus sign if time must be subtracted from UTC. -.It 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 -.Em \- -then standard time always applies in the time zone. -.It FORMAT -The format for time zone abbreviations in this time zone. -The pair of characters -.Em %s -is used to show where the -.Dq "variable part" -of the time zone abbreviation goes. -Alternately, -a slash (/) -separates standard and daylight abbreviations. -.It UNTILYEAR [MONTH [DAY [TIME]]] -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 -fields of a rule; trailing fields can be omitted, and default to the -earliest possible value for the missing fields. -.Pp -The next line must be a -.Dq continuation -line; this has the same form as a zone line except that the -string -.Dq Zone -and the name are omitted, as the continuation line will -place information starting at the time specified as the -.Em until -information in the previous line in the file used by the previous line. -Continuation lines may contain -.Em until -information, just as zone lines do, indicating that the next line is a further -continuation. -.El -.Pp -A link line has the form -.Dl "Link LINK-FROM LINK-TO -For example: -.Dl "Link Europe/Istanbul Asia/Istanbul -The -.Em LINK-FROM -field should appear as the -.Em NAME -field in some zone line; -the -.Em LINK-TO -field is used as an alternate name for that zone. -.Pp -Except for continuation lines, -lines may appear in any order in the input. -.Pp -Lines in the file that describes leap seconds have the following form: -.Dl "Leap YEAR MONTH DAY HH:MM:SS CORR R/S -For example: -.Dl "Leap 1974 Dec 31 23:59:60 + S -The -.Em YEAR , -.Em MONTH , -.Em DAY , -and -.Em HH:MM:SS -fields tell when the leap second happened. -The -.Em CORR -field -should be -.Dq + -if a second was added -or -.Dq - -if a second was skipped. -.\" There's no need to document the following, since it's impossible for more -.\" than one leap second to be inserted or deleted at a time. -.\" The C Standard is in error in suggesting the possibility. -.\" See Terry J Quinn, The BIPM and the accurate measure of time, -.\" Proc IEEE 79, 7 (July 1991), 894-905. -.\" or -.\" .q ++ -.\" if two seconds were added -.\" or -.\" .q -- -.\" if two seconds were skipped. -The -.Em R/S -field -should be (an abbreviation of) -.Dq Stationary -if the leap second time given by the other fields should be interpreted as UTC -or -(an abbreviation of) -.Dq Rolling -if the leap second time given by the other fields should be interpreted as -local wall clock time. -.Sh "EXTENDED EXAMPLE" -Here is an extended example of -.Nm -input, intended to illustrate many of its features. -.br -.ne 22 -.nf -.in +2m -.ta \w'# Rule\0\0'u +\w'NAME\0\0'u +\w'FROM\0\0'u +\w'1973\0\0'u +\w'TYPE\0\0'u +\w'Apr\0\0'u +\w'lastSun\0\0'u +\w'2:00\0\0'u +\w'SAVE\0\0'u -.sp -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Swiss 1940 only - Nov 2 0:00 1:00 S -Rule Swiss 1940 only - Dec 31 0:00 0 - -Rule Swiss 1941 1942 - May Sun>=1 2:00 1:00 S -Rule Swiss 1941 1942 - Oct Sun>=1 0:00 0 -.sp .5 -Rule EU 1977 1980 - Apr Sun>=1 1:00u 1:00 S -Rule EU 1977 only - Sep lastSun 1:00u 0 - -Rule EU 1978 only - Oct 1 1:00u 0 - -Rule EU 1979 1995 - Sep lastSun 1:00u 0 - -Rule EU 1981 max - Mar lastSun 1:00u 1:00 S -Rule EU 1996 max - Oct lastSun 1:00u 0 - -.sp -.ta \w'# Zone\0\0'u +\w'Europe/Zurich\0\0'u +\w'0:34:08\0\0'u +\w'RULES/SAVE\0\0'u +\w'FORMAT\0\0'u -# Zone NAME GMTOFF RULES FORMAT UNTIL -Zone Europe/Zurich 0:34:08 - LMT 1848 Sep 12 - 0:29:44 - BMT 1894 Jun - 1:00 Swiss CE%sT 1981 - 1:00 EU CE%sT -.sp -Link Europe/Zurich Switzerland -.sp -.in -.fi -In this example, the zone is named Europe/Zurich but it has an alias -as Switzerland. -Zurich was 34 minutes and 8 seconds west of GMT until 1848-09-12 -at 00:00, when the offset changed to 29 minutes and 44 seconds. -After 1894-06-01 at 00:00 Swiss daylight saving rules (defined with -lines beginning with "Rule Swiss") apply, and the GMT offset became -one hour. -From 1981 to the present, EU daylight saving rules have applied, -and the UTC offset has remained at one hour. -.Pp -In 1940, daylight saving time applied from November 2 at 00:00 to -December 31 at 00:00. -In 1941 and 1942, daylight saving time applied from the first Sunday -in May at 02:00 to the first Sunday in October at 00:00. -The pre-1981 EU daylight-saving rules have no effect here, but are -included for completeness. -Since 1981, daylight saving has begun on the last Sunday in March -at 01:00 UTC. -Until 1995 it ended the last Sunday in September at 01:00 UTC, but -this changed to the last Sunday in October starting in 1996. -.Pp -For purposes of display, "LMT" and "BMT" were initially used, -respectively. -Since Swiss rules and later EU rules were applied, the display name -for the timezone has been CET for standard time and CEST for daylight -saving time. -.Sh NOTES -For areas with more than two types of local time, -you may need to use local standard time in the -.Em AT -field of the earliest transition time's rule to ensure that -the earliest transition time recorded in the compiled file is correct. -.Pp -If, for a particular zone, a clock advance caused by the start of -daylight saving coincides with and is equal to a clock retreat -caused by a change in UTC offset, -.Nm -produces a single transition to daylight saving at the new UTC offset -(without any change in wall clock time). -To get separate transitions use multiple zone continuation lines -specifying transition instants using universal time. -.Sh FILES -.Bl -tag -width /usr/share/zoneinfo -compact -.It /usr/share/zoneinfo -standard directory used for created files -.El -.Sh "SEE ALSO" -.Xr ctime 3 , -.Xr tzfile 5 , -.Xr zdump 8 -.\" @(#)zic.8 8.5 -.\" This file is in the public domain, so clarified as of -.\" 2009-05-17 by Arthur David Olson. |
