84d9c625bf
- Fix for possible unset uid/gid in toproto
- Fix for default mtree style
- Update libelf
- Importing libexecinfo
- Resynchronize GCC, mpc, gmp, mpfr
- build.sh: Replace params with show-params.
This has been done as the make target has been renamed in the same
way, while a new target named params has been added. This new
target generates a file containing all the parameters, instead of
printing it on the console.
- Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
get getservbyport() out of the inner loop
Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
473 lines
12 KiB
Bash
473 lines
12 KiB
Bash
#! /bin/bash
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#
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# $NetBSD: tzselect.ksh,v 1.9 2013/09/20 19:06:54 christos Exp $
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#
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PKGVERSION='(tzcode) '
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TZVERSION=see_Makefile
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REPORT_BUGS_TO=tz@iana.org
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# Ask the user about the time zone, and output the resulting TZ value to stdout.
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# Interact with the user via stderr and stdin.
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# Contributed by Paul Eggert.
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# Porting notes:
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#
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# This script requires a Posix-like shell with the extension of a
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# 'select' statement. The 'select' statement was introduced in the
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# Korn shell and is available in Bash and other shell implementations.
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# If your host lacks both Bash and the Korn shell, you can get their
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# source from one of these locations:
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#
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# Bash <http://www.gnu.org/software/bash/bash.html>
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# Korn Shell <http://www.kornshell.com/>
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# Public Domain Korn Shell <http://www.cs.mun.ca/~michael/pdksh/>
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#
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# This script also uses several features of modern awk programs.
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# If your host lacks awk, or has an old awk that does not conform to Posix,
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# you can use either of the following free programs instead:
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#
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# Gawk (GNU awk) <http://www.gnu.org/software/gawk/>
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# mawk <http://invisible-island.net/mawk/>
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# Specify default values for environment variables if they are unset.
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: ${AWK=awk}
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: ${TZDIR=$(pwd)}
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# Check for awk Posix compliance.
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($AWK -v x=y 'BEGIN { exit 123 }') </dev/null >/dev/null 2>&1
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[ $? = 123 ] || {
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echo >&2 "$0: Sorry, your \`$AWK' program is not Posix compatible."
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exit 1
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}
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coord=
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location_limit=10
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usage="Usage: tzselect [--version] [--help] [-c COORD] [-n LIMIT]
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Select a time zone interactively.
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Options:
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-c COORD
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Instead of asking for continent and then country and then city,
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ask for selection from time zones whose largest cities
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are closest to the location with geographical coordinates COORD.
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COORD should use ISO 6709 notation, for example, '-c +4852+00220'
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for Paris (in degrees and minutes, North and East), or
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'-c -35-058' for Buenos Aires (in degrees, South and West).
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-n LIMIT
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Display at most LIMIT locations when -c is used (default $location_limit).
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--version
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Output version information.
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--help
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Output this help.
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Report bugs to $REPORT_BUGS_TO."
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while getopts c:n:-: opt
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do
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case $opt$OPTARG in
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c*)
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coord=$OPTARG ;;
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n*)
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location_limit=$OPTARG ;;
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-help)
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exec echo "$usage" ;;
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-version)
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exec echo "tzselect $PKGVERSION$TZVERSION" ;;
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-*)
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echo >&2 "$0: -$opt$OPTARG: unknown option; try '$0 --help'"; exit 1 ;;
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*)
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echo >&2 "$0: try '$0 --help'"; exit 1 ;;
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esac
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done
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shift $((OPTIND-1))
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case $# in
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0) ;;
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*) echo >&2 "$0: $1: unknown argument"; exit 1 ;;
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esac
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# Make sure the tables are readable.
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TZ_COUNTRY_TABLE=$TZDIR/iso3166.tab
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TZ_ZONE_TABLE=$TZDIR/zone.tab
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for f in $TZ_COUNTRY_TABLE $TZ_ZONE_TABLE
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do
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<$f || {
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echo >&2 "$0: time zone files are not set up correctly"
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exit 1
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}
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done
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newline='
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'
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IFS=$newline
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# Work around a bug in bash 1.14.7 and earlier, where $PS3 is sent to stdout.
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case $(echo 1 | (select x in x; do break; done) 2>/dev/null) in
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?*) PS3=
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esac
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# Awk script to read a time zone table and output the same table,
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# with each column preceded by its distance from 'here'.
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output_distances='
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BEGIN {
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FS = "\t"
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while (getline <TZ_COUNTRY_TABLE)
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if ($0 ~ /^[^#]/)
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country[$1] = $2
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country["US"] = "US" # Otherwise the strings get too long.
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}
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function convert_coord(coord, deg, min, ilen, sign, sec) {
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if (coord ~ /^[-+]?[0-9]?[0-9][0-9][0-9][0-9][0-9][0-9]([^0-9]|$)/) {
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degminsec = coord
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intdeg = degminsec < 0 ? -int(-degminsec / 10000) : int(degminsec / 10000)
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minsec = degminsec - intdeg * 10000
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intmin = minsec < 0 ? -int(-minsec / 100) : int(minsec / 100)
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sec = minsec - intmin * 100
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deg = (intdeg * 3600 + intmin * 60 + sec) / 3600
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} else if (coord ~ /^[-+]?[0-9]?[0-9][0-9][0-9][0-9]([^0-9]|$)/) {
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degmin = coord
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intdeg = degmin < 0 ? -int(-degmin / 100) : int(degmin / 100)
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min = degmin - intdeg * 100
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deg = (intdeg * 60 + min) / 60
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} else
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deg = coord
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return deg * 0.017453292519943296
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}
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function convert_latitude(coord) {
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match(coord, /..*[-+]/)
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return convert_coord(substr(coord, 1, RLENGTH - 1))
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}
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function convert_longitude(coord) {
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match(coord, /..*[-+]/)
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return convert_coord(substr(coord, RLENGTH))
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}
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# Great-circle distance between points with given latitude and longitude.
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# Inputs and output are in radians. This uses the great-circle special
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# case of the Vicenty formula for distances on ellipsoids.
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function dist(lat1, long1, lat2, long2, dlong, x, y, num, denom) {
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dlong = long2 - long1
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x = cos (lat2) * sin (dlong)
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y = cos (lat1) * sin (lat2) - sin (lat1) * cos (lat2) * cos (dlong)
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num = sqrt (x * x + y * y)
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denom = sin (lat1) * sin (lat2) + cos (lat1) * cos (lat2) * cos (dlong)
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return atan2(num, denom)
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}
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BEGIN {
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coord_lat = convert_latitude(coord)
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coord_long = convert_longitude(coord)
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}
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/^[^#]/ {
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here_lat = convert_latitude($2)
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here_long = convert_longitude($2)
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line = $1 "\t" $2 "\t" $3 "\t" country[$1]
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if (NF == 4)
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line = line " - " $4
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printf "%g\t%s\n", dist(coord_lat, coord_long, here_lat, here_long), line
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}
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'
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# Begin the main loop. We come back here if the user wants to retry.
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while
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echo >&2 'Please identify a location' \
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'so that time zone rules can be set correctly.'
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continent=
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country=
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region=
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case $coord in
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?*)
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continent=coord;;
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'')
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# Ask the user for continent or ocean.
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echo >&2 'Please select a continent, ocean, "coord", or "TZ".'
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quoted_continents=$(
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$AWK -F'\t' '
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/^[^#]/ {
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entry = substr($3, 1, index($3, "/") - 1)
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if (entry == "America")
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entry = entry "s"
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if (entry ~ /^(Arctic|Atlantic|Indian|Pacific)$/)
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entry = entry " Ocean"
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printf "'\''%s'\''\n", entry
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}
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' $TZ_ZONE_TABLE |
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sort -u |
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tr '\n' ' '
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echo ''
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)
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eval '
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select continent in '"$quoted_continents"' \
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"coord - I want to use geographical coordinates." \
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"TZ - I want to specify the time zone using the Posix TZ format."
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do
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case $continent in
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"")
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echo >&2 "Please enter a number in range.";;
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?*)
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case $continent in
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Americas) continent=America;;
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*" "*) continent=$(expr "$continent" : '\''\([^ ]*\)'\'')
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esac
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break
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esac
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done
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'
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esac
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case $continent in
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'')
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exit 1;;
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TZ)
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# Ask the user for a Posix TZ string. Check that it conforms.
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while
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echo >&2 'Please enter the desired value' \
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'of the TZ environment variable.'
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echo >&2 'For example, GST-10 is a zone named GST' \
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'that is 10 hours ahead (east) of UTC.'
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read TZ
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$AWK -v TZ="$TZ" 'BEGIN {
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tzname = "[^-+,0-9][^-+,0-9][^-+,0-9]+"
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time = "[0-2]?[0-9](:[0-5][0-9](:[0-5][0-9])?)?"
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offset = "[-+]?" time
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date = "(J?[0-9]+|M[0-9]+\.[0-9]+\.[0-9]+)"
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datetime = "," date "(/" time ")?"
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tzpattern = "^(:.*|" tzname offset "(" tzname \
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"(" offset ")?(" datetime datetime ")?)?)$"
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if (TZ ~ tzpattern) exit 1
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exit 0
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}'
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do
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echo >&2 "\`$TZ' is not a conforming" \
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'Posix time zone string.'
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done
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TZ_for_date=$TZ;;
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*)
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case $continent in
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coord)
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case $coord in
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'')
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echo >&2 'Please enter coordinates' \
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'in ISO 6709 notation.'
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echo >&2 'For example, +4042-07403 stands for'
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echo >&2 '40 degrees 42 minutes north,' \
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'74 degrees 3 minutes west.'
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read coord;;
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esac
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distance_table=$($AWK \
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-v coord="$coord" \
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-v TZ_COUNTRY_TABLE="$TZ_COUNTRY_TABLE" \
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"$output_distances" <$TZ_ZONE_TABLE |
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sort -n |
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sed "${location_limit}q"
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)
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regions=$(echo "$distance_table" | $AWK '
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BEGIN { FS = "\t" }
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{ print $NF }
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')
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echo >&2 'Please select one of the following' \
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'time zone regions,'
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echo >&2 'listed roughly in increasing order' \
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"of distance from $coord".
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select region in $regions
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do
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case $region in
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'') echo >&2 'Please enter a number in range.';;
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?*) break;;
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esac
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done
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TZ=$(echo "$distance_table" | $AWK -v region="$region" '
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BEGIN { FS="\t" }
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$NF == region { print $4 }
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')
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;;
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*)
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# Get list of names of countries in the continent or ocean.
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countries=$($AWK -F'\t' \
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-v continent="$continent" \
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-v TZ_COUNTRY_TABLE="$TZ_COUNTRY_TABLE" \
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'
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/^#/ { next }
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$3 ~ ("^" continent "/") {
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if (!cc_seen[$1]++) cc_list[++ccs] = $1
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}
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END {
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while (getline <TZ_COUNTRY_TABLE) {
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if ($0 !~ /^#/) cc_name[$1] = $2
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}
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for (i = 1; i <= ccs; i++) {
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country = cc_list[i]
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if (cc_name[country]) {
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country = cc_name[country]
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}
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print country
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}
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}
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' <$TZ_ZONE_TABLE | sort -f)
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# If there's more than one country, ask the user which one.
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case $countries in
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*"$newline"*)
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echo >&2 'Please select a country' \
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'whose clocks agree with yours.'
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select country in $countries
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do
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case $country in
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'') echo >&2 'Please enter a number in range.';;
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?*) break
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esac
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done
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case $country in
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'') exit 1
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esac;;
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*)
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country=$countries
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esac
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# Get list of names of time zone rule regions in the country.
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regions=$($AWK -F'\t' \
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-v country="$country" \
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-v TZ_COUNTRY_TABLE="$TZ_COUNTRY_TABLE" \
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'
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BEGIN {
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cc = country
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while (getline <TZ_COUNTRY_TABLE) {
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if ($0 !~ /^#/ && country == $2) {
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cc = $1
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break
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}
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}
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}
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$1 == cc { print $4 }
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' <$TZ_ZONE_TABLE)
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# If there's more than one region, ask the user which one.
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case $regions in
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*"$newline"*)
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echo >&2 'Please select one of the following' \
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'time zone regions.'
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select region in $regions
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do
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case $region in
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'') echo >&2 'Please enter a number in range.';;
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?*) break
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esac
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done
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case $region in
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'') exit 1
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esac;;
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*)
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region=$regions
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esac
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# Determine TZ from country and region.
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TZ=$($AWK -F'\t' \
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-v country="$country" \
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-v region="$region" \
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-v TZ_COUNTRY_TABLE="$TZ_COUNTRY_TABLE" \
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'
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BEGIN {
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cc = country
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while (getline <TZ_COUNTRY_TABLE) {
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if ($0 !~ /^#/ && country == $2) {
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cc = $1
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break
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}
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}
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}
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$1 == cc && $4 == region { print $3 }
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' <$TZ_ZONE_TABLE)
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esac
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# Make sure the corresponding zoneinfo file exists.
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TZ_for_date=$TZDIR/$TZ
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<$TZ_for_date || {
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echo >&2 "$0: time zone files are not set up correctly"
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exit 1
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}
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esac
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# Use the proposed TZ to output the current date relative to UTC.
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# Loop until they agree in seconds.
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# Give up after 8 unsuccessful tries.
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extra_info=
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for i in 1 2 3 4 5 6 7 8
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do
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TZdate=$(LANG=C TZ="$TZ_for_date" date)
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UTdate=$(LANG=C TZ=UTC0 date)
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TZsec=$(expr "$TZdate" : '.*:\([0-5][0-9]\)')
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UTsec=$(expr "$UTdate" : '.*:\([0-5][0-9]\)')
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case $TZsec in
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$UTsec)
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extra_info="
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Local time is now: $TZdate.
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Universal Time is now: $UTdate."
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break
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esac
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done
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# Output TZ info and ask the user to confirm.
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echo >&2 ""
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echo >&2 "The following information has been given:"
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echo >&2 ""
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case $country%$region%$coord in
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?*%?*%) echo >&2 " $country$newline $region";;
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?*%%) echo >&2 " $country";;
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%?*%?*) echo >&2 " coord $coord$newline $region";;
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%%?*) echo >&2 " coord $coord";;
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+) echo >&2 " TZ='$TZ'"
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esac
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echo >&2 ""
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echo >&2 "Therefore TZ='$TZ' will be used.$extra_info"
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echo >&2 "Is the above information OK?"
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ok=
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select ok in Yes No
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do
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case $ok in
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'') echo >&2 'Please enter 1 for Yes, or 2 for No.';;
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?*) break
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esac
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done
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case $ok in
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'') exit 1;;
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Yes) break
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esac
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do coord=
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done
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case $SHELL in
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*csh) file=.login line="setenv TZ '$TZ'";;
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*) file=.profile line="TZ='$TZ'; export TZ"
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esac
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echo >&2 "
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You can make this change permanent for yourself by appending the line
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$line
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to the file '$file' in your home directory; then log out and log in again.
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Here is that TZ value again, this time on standard output so that you
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can use the $0 command in shell scripts:"
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echo "$TZ"
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