zonedir="/usr/share/zoneinfo/posix"
if [ $# -eq 0 ];then
timezone="Shanghai"
mixedzone="Asia"
elif [ "$1" = "list" ];then
(echo "All known time zones and regions defined on this system:"
cd $zonedir
find -L * -type f -print | xargs -n 2| awk '{printf " %-38s %-38s\n",$1,$2}')|more
exit 0
else
region="$(dirname $1)"
zone="$(basename $1)"
matchcnt="$(find -L $zonedir -name $zone -type f -print | wc -l | sed 's/[^[:digit:]]//g')"
if [ "$matchcnt" -gt 0 ];then
if [ $matchcnt -gt 1 ];then
echo "\"$zone\" matches more than one possible time zone record. Please usr list to see all known regions and time zones"
exit 1
fi
match="$(find -L $zonedir -name $zone -type f -print)"
mixedzone="$zone"
else
mixedzone="$(echo ${zone%${zone#?}} | tr '[[:lower:]]' '[[:upper:]]')$(echo ${zone#?} | tr '[[:upper:]]' '[[:lower:]]')"
if [ "mixedregion" != "." ];then
match="$(find -L $zonedir/$mixeregion -type f -name $mixedzone -print)"
else
match="$(find -L $zonedir -name $mixedzone -type f -print)"
fi
if [ -z "$match" ];then
if [ ! -z $(find -L $zonedir -name $mixedzone -type d -print) ];then
echo "The region \"$1\" has more than one time zone."
else
echo "can't find an exact match for \"$1\"."
fi
echo "Please ust list to see all known regions and time zones."
exit 1
fi
fi
timezone="$match"
fi
nicetz=$(echo $timezone | sed "s|$zonedir/||g")
echo it is $(TZ=$timezone date '+%A ,%B %e,%Y,at %l:%M %p') in $nicetz
exit 0