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#! /bin/sh
set -e
show_continents() {
cat <<EOF
Please enter the number of the geographic area in which you live:
1) Africa 7) Australia
2) America 8) Europe
3) US time zones 9) Indian Ocean
4) Canada time zones 10) Pacific Ocean
5) Asia 11) Use System V style time zones
6) Atlantic Ocean 12) None of the above
Then you will be shown a list of cities which represent the time zone
in which they are located. You should choose a city in your time zone.
EOF
until [ have_continent = yes ]
do
echo -n "Number: " ; read area
case $area in
1) continent=Africa ; have_continent=yes ;;
2) continent=America ; have_continent=yes ;;
3) continent=US ; have_continent=yes ;;
4) continent=Canada ; have_continent=yes ;;
5) continent=Asia ; have_continent=yes ;;
6) continent=Atlantic ; have_continent=yes ;;
7) continent=Australia ; have_continent=yes ;;
8) continent=Europe ; have_continent=yes ;;
9) continent=Indian ; have_continent=yes ;;
10) continent=Pacific ; have_continent=yes ;;
11) continent=SystemV ; have_continent=yes ;;
12) continent=Etc ; have_continent=yes ;;
esac
}
zone_info()
{
extra_info=
for i in 1 2 3 4 5 6 7 8
do
TZdate=$(LANG=C TZ="$timezone" date)
UTdate=$(LANG=C TZ=UTC0 date)
TZsec=$(expr "$TZdate" : '.*:\([0-5][0-9]\)')
UTsec=$(expr "$UTdate" : '.*:\([0-5][0-9]\)')
case $TZsec in
$UTsec)
extra_info="
Local time is now: $TZdate.
Universal Time is now: $UTdate."
break
esac
done
}
show_usage() {
cat <<EOF
Usage: tzconfig [OPTION]
-c, --check Verify current timezone setting.
-s, --set Set timezone, ignoring current setting (if any).
-h, --help Give this help message.
EOF
}
valid_timezone() {
if [ -f /usr/share/zoneinfo/$1 ] && [ $1 != "Factory" ]
}
update_localtime() {
if valid_timezone $timezone
then
rm -f /etc/localtime
cp /usr/share/zoneinfo/$timezone /etc/localtime
fi
# Handle problem caused by lame old tzconfig.
elif [ "$timezone" = "US/Pacific-New" ]
then
echo "US/Pacific" > /etc/timezone
rm -f /etc/localtime
cp /usr/share/zoneinfo/US/Pacific /etc/localtime
fi
}
set_timezone() {
until valid_timezone $timezone
do
query_timezone
done
}
if [ "$(id -u)" != "0" ]; then
non_root=1
fi
if [ $# -eq 0 ] || [ $1 = "--help" ]; then
show_help
fi
case "$1" in
-c|--check)
check_timezone
;;
-s|--set)
set_timezone
;;
-u|--update)
check_timezone
update_localtime
;;
-h|--help|*)
show_usage
;;
TIMEZONES=$(tempfile -p time) || TIMEZONES=/etc/timezone.$$
if [ -f /etc/timezone ]; then
echo "Your current time zone is set to `cat /etc/timezone`"
echo -n "Do you want to change that? [n]: "
read ans
if [ "x$ans" = "x" -o "$ans" = "n" -o "$ans" = "no" ]; then
echo "Your time zone will not be changed"
exit 0
fi
fi
query_timezone() {
( cd /usr/share/zoneinfo ; find . -type f | sed -e 's/^.\///' | sort > $TIMEZONES )
valid=no
while [ $have_zone = no ]; do
show_continents
echo -n "Number: " ; read area
case $area in
1) continent=Africa ; have_continent=yes ;;
2) continent=America ; have_continent=yes ;;
3) continent=US ; have_continent=yes ;;
4) continent=Canada ; have_continent=yes ;;
5) continent=Asia ; have_continent=yes ;;
6) continent=Atlantic ; have_continent=yes ;;
7) continent=Australia ; have_continent=yes ;;
8) continent=Europe ; have_continent=yes ;;
9) continent=Indian ; have_continent=yes ;;
10) continent=Pacific ; have_continent=yes ;;
11) continent=SystemV ; have_continent=yes ;;
12) continent=Etc ; have_continent=yes ;;
esac
done
if [ -x /usr/bin/fmt ]; then fmt_bin=/usr/bin/fmt
else fmt_bin=/bin/more ; fi
valid=no
zone=""
while [ $valid = no ]; do
if [ -n "$zone" ]; then
number=`grep -i -c "^$continent/$zone" $TIMEZONES`
if [ $number -eq 1 ]; then
timezone=`grep -i "^$continent/$zone" $TIMEZONES`
zone_info
echo "Your default time zone is set to '$timezone'.$extra_info"
valid=yes
break
fi
fi
echo
grep -i "^$continent/$zone" $TIMEZONES | cut -d/ -f2- | $fmt_bin
echo
echo "Please enter the name of one of these cities or zones"
echo "You just need to type enough letters to resolve ambiguities"
echo "Press Enter to view all of them again"
echo -n "Name: [$zone] " ; read zone
done
if [ "$non_root" -ne 1 ]; then
echo $timezone > /etc/timezone
test -d /etc/default || mkdir -m 755 /etc/default
echo $timezone > /etc/default/timezone
rm -f /etc/localtime
cp /usr/share/zoneinfo/$timezone /etc/localtime
#ln -sf $timezone /usr/share/zoneinfo/localtime
else
export TZ=$timezone
echo "You need to place the following in your shell's"
echo "startup file (which one, depends on the shell):"
echo "'export TZ=$timezone' (sh-style shells) or"
echo "'setenv TZ $timezone' (csh-style shells)."
fi
trap 'rm -f $TIMEZONES' 0 1 2 3 13 15
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