| -ccoord | Instead of asking for continent and then country and then city, ask for selection from time zones whose largest cities are closest to the location with geographical coordinates coord. Use ISO 6709 notation for coord, that is, a latitude immediately followed by a longitude. The latitude and longitude should be signed integers followed by an optional decimal point and fraction: positive numbers represent north and east, negative south and west. Latitudes with two and longitudes with three integer digits are treated as degrees; latitudes with four or six and longitudes with five or seven integer digits are treated as DDMM, DDDMM, DDMMSS, or DDDMMSS representing DD or DDD degrees, MM minutes, and zero or SS seconds, with any trailing fractions represent fractional minutes or (if SS is present) seconds. The decimal point is that of the current locale. For example, in the (default) C locale, -c +40.689-074.045 specifies 40.689 degrees N, 74.045 degrees W, -c +4041.4-07402.7 specifies 40 degrees 41.4 minutes N, 74 degrees 2.7 minutes W, and -c +404121-0740240 specifies 40 degrees 41 minutes 21 seconds N, 74 degrees 2 minutes 40 seconds W. If coord is not one of the documented forms, the resulting behavior is unspecified. |
| -nlimit | When -c is used, display the closest limit locations (default 10). |
| --help | Output help information and exit. |
| --version | Output version information and exit. |
| AWK | Name of a POSIX-compliant awk program (default: awk). |
| TZDIR | Name of the directory containing timezone data files (default: /usr/share/zoneinfo). |
| TZDIR/iso3166.tab | Table of ISO 3166 2-letter country codes and country names. |
| TZDIR/zone1970.tab | Table of country codes, latitude and longitude, timezones, and descriptive comments. |
| TZDIR/TZ | Timezone data file for timezone TZ. |
NAME
tzselect - select a timezone
SYNOPSIS
tzselect [ -ccoord ] [ -nlimit ] [ --help ] [ --version ]
DESCRIPTION
The tzselect program asks the user for information about the current location, and outputs the resulting timezone to standard output. The output is suitable as a value for the TZ environment variable.
All interaction with the user is done via standard input and standard error.
OPTIONS
- -ccoord
Instead of asking for continent and then country and then city, ask for selection from time zones whose largest cities are closest to the location with geographical coordinates coord. Use ISO 6709 notation for coord, that is, a latitude immediately followed by a longitude. The latitude and longitude should be signed integers followed by an optional decimal point and fraction: positive numbers represent north and east, negative south and west. Latitudes with two and longitudes with three integer digits are treated as degrees; latitudes with four or six and longitudes with five or seven integer digits are treated as DDMM, DDDMM, DDMMSS, or DDDMMSS representing DD or DDD degrees, MM minutes, and zero or SS seconds, with any trailing fractions represent fractional minutes or (if SS is present) seconds. The decimal point is that of the current locale. For example, in the (default) C locale, -c +40.689-074.045 specifies 40.689 degrees N, 74.045 degrees W, -c +4041.4-07402.7 specifies 40 degrees 41.4 minutes N, 74 degrees 2.7 minutes W, and -c +404121-0740240 specifies 40 degrees 41 minutes 21 seconds N, 74 degrees 2 minutes 40 seconds W. If coord is not one of the documented forms, the resulting behavior is unspecified.
- -nlimit
When -c is used, display the closest limit locations (default 10).
- --help
Output help information and exit.
- --version
Output version information and exit.
ENVIRONMENT VARIABLES
- AWK
Name of a POSIX-compliant awk program (default: awk).
- TZDIR
Name of the directory containing timezone data files (default: /usr/share/zoneinfo).
FILES
- TZDIR/iso3166.tab
Table of ISO 3166 2-letter country codes and country names.
- TZDIR/zone1970.tab
Table of country codes, latitude and longitude, timezones, and descriptive comments.
- TZDIR/TZ
Timezone data file for timezone TZ.
EXIT STATUS
The exit status is zero if a timezone was successfully obtained from the user, nonzero otherwise.
SEE ALSO
newctime(3), tzfile(5), zdump(8), zic(8)
NOTES
Applications should not assume that tzselect's output matches the user's political preferences.