The login backoff had no wake-up path. A unit started at boot sits in
wait_for_session and reaches the ceiling within ~90s; the user then signs
in and `enable --now` is a no-op on an already-active unit, so the daemon
kept sleeping and the mount appeared up to a full interval late.
- service::enable_start now runs `enable` + `restart` instead of
`enable --now`, so the GUI login and the tray's Connect interrupt the
sleep immediately and still start a unit that is down.
- `pdfs login` restarts the unit when it is already active. It stays out
of `enable` on purpose, so a headless setup driving `pdfs daemon` by
hand is left alone.
- Lower the backoff ceiling from 60s to 15s. It is still an 80% cut in
keyring/D-Bus wakeups (28,800/day -> 5,760/day) and it bounds the
worst-case latency for paths that never touch systemd.
Also corrects the flat-3s-poll figure in the doc comment: 86400/3 is
28,800 checks a day, not 48,000.
The daemon's wait-for-login loop slept a flat 3 seconds between checks and
never gave up, so an enabled service with no saved session polled the keyring
28,800 times a day. Each check is more than a sleep: auth::load() builds a
fresh keyring::Entry, so every iteration opens a new D-Bus connection to the
Secret Service and negotiates a session on it.
Back off from 3s to a 60s ceiling and say "not logged in" once at INFO rather
than on every iteration, which also stops the journal filling with tens of
thousands of identical lines.
The wait is extracted into wait_for_session() taking the load and sleep calls
as parameters, so the schedule is testable without a keyring and without real
time passing.
Refs #21
nvrl
Kacper Paczos
emptyname
