Luca Boccassi
22a071a54d
Each <type>_id is picked from a Unit.List '{}' call and immediately
queried via a second Unit.List '{"name":"<id>"}' call. When the picked
unit is tied to a user session (run-user-N.mount, user@N.service,
user-runtime-dir@N.service, session-cN.scope) it may be torn down
between the two calls if the user manager happens to exit at that
moment, causing a spurious NoSuchUnit failure.
Filter those out of the candidate lists for mount/service/scope.
Excerpt from a failed CI run showing the race:
[ 2631.395826] systemd[1]: user-runtime-dir@4711.service: Trying to enqueue job user-runtime-dir@4711.service/stop/fail
[ 2632.101414] systemd[1]: user-runtime-dir@4711.service: Got final SIGCHLD for state stop.
[ 2632.182537] TEST-74-AUX-UTILS.sh[3051]: + mount_id=run-user-4711.mount
[ 2632.186760] TEST-74-AUX-UTILS.sh[3099]: + varlinkctl call /run/systemd/io.systemd.Manager io.systemd.Unit.List '{"name":"run-user-4711.mount"}'
[ 2632.189752] systemd[1]: varlink-api-3-3: Sending message: {"error":"io.systemd.Unit.NoSuchUnit"}
[ 2632.190752] TEST-74-AUX-UTILS.sh[3099]: Method call io.systemd.Unit.List() failed: io.systemd.Unit.NoSuchUnit
[ 2632.191594] TEST-74-AUX-UTILS.sh[101]: Subtest /usr/lib/systemd/tests/testdata/units/TEST-74-AUX-UTILS.varlinkctl-unit.sh failed
Co-developed-by: Claude Opus 4.7 <noreply@anthropic.com>
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