r-vdp
2e254eba03
Check that the manager broadcasts Reloading(true/false) on the API bus for daemon-reload, and the one-shot Reloading(false) after a daemon-reexec, which requires the subscribers of the previous instance to be coldplugged before the D-Bus queue is dispatched.
74 lines
2.7 KiB
Bash
Executable File
74 lines
2.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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# SPDX-License-Identifier: LGPL-2.1-or-later
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set -eux
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set -o pipefail
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# Verify that the manager broadcasts the Reloading signal on the API bus,
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# both for daemon-reload and, as a one-shot Reloading(false), after a
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# daemon-reexec.
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#
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# The reexec case is a regression test: API bus subscribers from the
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# pre-reexec instance are coldplugged only once the asynchronous GetId
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# reply is processed (see bus_init_api()). The D-Bus queue dispatch must
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# not consume send_reloading_done before that happened, otherwise the
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# Reloading(false) signal is lost and clients waiting for it to detect the
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# end of the reexec time out.
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MONITOR_LOG=/run/TEST-07-PID1-reloading-signal.log
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MONITOR_UNIT=
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at_exit() {
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[[ -n "$MONITOR_UNIT" ]] && systemctl stop "$MONITOR_UNIT" 2>/dev/null || :
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rm -f "$MONITOR_LOG"
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}
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trap at_exit EXIT
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start_monitor() {
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# Use a fresh unit name every time, a previous instance might not have
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# been garbage-collected yet. busctl monitor sends READY=1 once the
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# monitor is installed, so with Type=notify the monitor is guaranteed
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# to be running when systemd-run returns.
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MONITOR_UNIT="busctl-monitor-$RANDOM.service"
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systemd-run --unit="$MONITOR_UNIT" --service-type=notify --quiet \
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--property=StandardOutput=file:"$MONITOR_LOG" \
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busctl monitor \
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--match="type=signal,path=/org/freedesktop/systemd1,interface=org.freedesktop.systemd1.Manager,member=Reloading"
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}
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stop_monitor() {
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systemctl stop "$MONITOR_UNIT"
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MONITOR_UNIT=
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rm -f "$MONITOR_LOG"
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}
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wait_for_reloading() {
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local value=${1:?}
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timeout 30 bash -ec "until grep -F 'BOOLEAN ${value};' $MONITOR_LOG >/dev/null; do sleep .5; done"
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}
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# The manager sends the Reloading signal on the API bus only if it has at
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# least one subscriber. logind subscribes, and its subscription is carried
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# over a daemon-reexec via serialization, so make sure it is running.
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systemctl start systemd-logind.service
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# logind's Subscribe call is asynchronous, so it may not have been processed
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# by the manager yet when logind announces readiness. Keep reloading until
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# the signal shows up in the monitor output.
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start_monitor
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timeout 30 bash -ec "until grep -F 'BOOLEAN true;' $MONITOR_LOG >/dev/null; do systemctl daemon-reload; sleep 1; done"
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# A daemon-reload sends Reloading(true) followed by Reloading(false).
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wait_for_reloading true
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wait_for_reloading false
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stop_monitor
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# A daemon-reexec must send the one-shot Reloading(false) once the new
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# manager instance is up, even though the subscribers of the old instance
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# are re-added only after the asynchronous API bus setup finished.
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start_monitor
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systemctl daemon-reexec
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wait_for_reloading false
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stop_monitor
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