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#!/bin/sh
set -eu
throttle_by=10
throttle_cookie=/tmp/throttle.msmtp-queue-stat
throttle() {
last_called=$(stat -c %Y $throttle_cookie 2>/dev/null || printf 0)
now=$(date +%s)
touch $throttle_cookie
if [ $((now - last_called)) -gt $throttle_by ]; then
"$@"
else
false
fi
}
throttle sh -c "msmtpq --q-mgmt -d | grep id= | wc -l | tee $throttle_cookie" || cat "$throttle_cookie"
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