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#!/usr/bin/env bash
set -euo pipefail
readarray -t failed < <( systemctl show '*.service' \
--state=failed --property=Names \
| sed -r -n 's,Names=(.+)\.service,\1,p' \
| sort
)
if [ ${#failed[@]} -ne 0 ]; then
printf -v list ', %s' "${failed[@]}"
printf 'WARNING: %s failed\n' "${list:2}"
exit 1
else
echo "OK: no failed services"
exit 0
fi
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