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tripadvisor/bash countdown with user output

Created June 2, 2010 20:48
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bash countdown with user output
countdown()
(
IFS=:
set -- $*
secs=$(( ${1#0} * 3600 + ${2#0} * 60 + ${3#0} ))
while [ $secs -gt 0 ]
do
sleep 1 &
printf "\r%02d:%02d:%02d" $((secs/3600)) $(( (secs/60)%60)) $((secs%60))
secs=$(( $secs - 1 ))
wait
done
echo
)
countdown "00:05:00"
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