Skip to content

Instantly share code, notes, and snippets.

@basinilya
Last active July 22, 2020 15:25
Show Gist options
  • Save basinilya/260096d9b90caf0044c5193ef00efd98 to your computer and use it in GitHub Desktop.
Save basinilya/260096d9b90caf0044c5193ef00efd98 to your computer and use it in GitHub Desktop.
#!/bin/bash
# Check if the current time falls within defined time range on UNIX
#set -e
set -o pipefail
function errtrap { es=$?; echo "ERROR line $1: Command exited with status $es.">&2; exit 1; }; trap 'errtrap $LINENO' ERR
#export TZ=Asia/Kolkata
within() { (
set +x
set -e
#export TZ=Asia/Kolkata
beg=${1:?}
end=${2:?}
if [ -z "$3" ]; then
now=`date +%s`
else
now=`date +%s -d "$3"`
fi
today=`date +%F -d@${now:?}`
if ! end1=`date +%s -d"${today:?} ${end:?}" 2>/dev/null`; then
tomorrow=`date +%F -d"${today:?} 1 days"`
end1=`date +%s -d"${tomorrow:?} ${end:?} 1 days ago"`
end2=`date +%s -d"${tomorrow:?} ${end:?}"`
else
end2=`date +%s -u -d "1970-01-01 $end1 seconds 1 days"`
fi
if ! beg2=`date +%s -d"${today:?} ${beg:?}" 2>/dev/null`; then
yesterday=`date +%F -d"${today:?} 1 days ago"`
beg2=`date +%s -d"${yesterday:?} ${beg:?} 1 days"`
fi
if ((beg2 < end1)); then
beg1=$beg2
else
beg1=`date +%s -u -d "1970-01-01 $beg2 seconds 1 days ago"`
fi
realbeg=$(( now >= beg2 ? beg2 : beg1 ))
realend=$(( realbeg > end1 ? end2 : end1 ))
if (( now >= realbeg && now < realend )); then
echo "Exiting because `date --iso-8601=seconds -d@$realbeg` <= `date --iso-8601=seconds -d@$now` < `date --iso-8601=seconds -d@$realend`"
exit 1
fi
exit 0
)}
t() {
within "$@"
}
f() {
! t "$@"
}
export TZ=Europe/Berlin
t "02:01" "02:03" "2020-03-29T05:01"
f "02:01" "02:03" "2020-03-30T02:02"
#set -x
export TZ=Asia/Kolkata
f 23:00 06:30 03:00
t 23:00 06:30 13:00
f "0:01 IST" "0:00 IST" "2020-07-19 0:01 IST"
f "13:01 IST" "13:00 IST" "2020-07-19 0:01 IST"
f "0:01 IST" "0:00 IST" "2020-07-19 0:01 IST"
f "0:01 IST" "0:00 IST" "2020-07-19 0:02 IST"
f "0:01 IST" "0:00 IST" "2020-07-19 23:59 IST"
t "0:01 IST" "0:00 IST" "2020-07-19 0:00 IST"
t "11:30PM IST" "2:30AM IST" "2020-07-19 23:29 IST"
f "11:30PM IST" "2:30AM IST" "2020-07-19 23:30 IST"
f "11:30PM IST" "2:30AM IST" "2020-07-19 0:00 IST"
f "11:30PM IST" "2:30AM IST" "2020-07-19 2:29 IST"
t "11:30PM IST" "2:30AM IST" "2020-07-19 2:30 IST"
t "11:30PM IST" "11:40PM IST" "2020-07-19 23:29 IST"
f "11:30PM IST" "11:40PM IST" "2020-07-19 23:30 IST"
f "11:30PM IST" "11:40PM IST" "2020-07-19 23:39 IST"
t "11:30PM IST" "11:40PM IST" "2020-07-19 23:40 IST"
echo ok
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment