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#!/bin/sh
# find first process with marker=true envvar set
set -eu
uid="${1:?}"
done=
while true; do
for pid in $(pgrep -u ${uid}); do
if grep -q 'marker=true' /proc/${pid}/environ 2>/dev/null; then
printf "%s" "$pid"
done=1
break
fi
done
[ -n "$done" ] && break
done
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