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n-johnson/eh.sh

Created March 25, 2016 04:36
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ec2-host cached
Raw
eh.sh
#!/bin/bash
MAX_CACHE=21600 # 6 hours (sec)
EC2_CACHE="$HOME/.ec2_host"
file_age() {
stat -f "%Sm" -t "%s" "$1"
}
cur_time=$(date "+%s")
last_mod=$(file_age "$EC2_CACHE")
cache_age=$(echo "$cur_time - $last_mod" | bc)
if [ "$cache_age" -gt "$MAX_CACHE" ]; then
ec2-host > "$EC2_CACHE"
fi
cat "$EC2_CACHE"
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