daynight.sh0000664000473400001440000000245711421147660012113 0ustar jillusers#!/bin/bash ## localize this, please: yourzip="80302" # set this to your local zip code function isdaytime { # shell functions return zero on success (true), non-zero on error hour=$(date +%H) min=$(date +%m) # get the sunrise/sunset times in a usable format from almanac.com request="http://www.almanac.com/astronomy/rise/zipcode" thedate="$(date +%Y-%m-%d)" url="$request/$yourzip/$thedate" raw="$(/usr/bin/curl --silent "$url" | grep rise_nextprev | cut -d\< -f28-30)" sunrise="$(echo $raw | cut -d\ -f2)"; sunset="$(echo $raw | cut -d\ -f4)" srh=$(echo $sunrise | cut -d: -f1) ; srm=$(echo $sunrise | cut -d: -f2) ssh=$(( $(echo $sunset | cut -d: -f1) + 12 )) ; ssm=$(echo $sunset | cut -d: -f2) # now let's test the current hour/minute against the sunrise/sunset times echo "testing current time: $hour:$min against sunrise $srh:$srm and sunset $ssh:$ssm" if [ $hour -eq $srh -a $min -ge $srm ] ; then return 0 # special case of sunrise hour fi if [ $hour -gt $srh -a $hour -lt $ssh ] ; then return 0 # easy: after sunrise, before sunset fi if [ $hour -eq $ssh -a $min -le $ssm ] ; then return 0 # special case: sunset hour fi return 1 } if isdaytime ; then echo it is daytime else echo it is nighttime fi exit 0 ## ENDS ##