From af09a5cf8ad76b156e4a48d77ecfada9c6402325 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Thu, 14 Dec 2023 12:11:16 +0100
Subject: [idleaction] Log shutdown/reboot/.. details in exam mode

We have a report about spurious reboots of machines in exam mode while
in use, so try to rule out that this was caused by idle-daemon logic by
logging any such action it would perform through a wrapper script.
---
 .../data/opt/openslx/scripts/idle-daemon-launcher  |  1 +
 .../openslx/scripts/idle-daemon-trigger-wrapper    | 41 ++++++++++++++++++++++
 2 files changed, 42 insertions(+)
 create mode 100755 core/modules/idleaction/data/opt/openslx/scripts/idle-daemon-trigger-wrapper

diff --git a/core/modules/idleaction/data/opt/openslx/scripts/idle-daemon-launcher b/core/modules/idleaction/data/opt/openslx/scripts/idle-daemon-launcher
index 640ef9fb..62a919ee 100755
--- a/core/modules/idleaction/data/opt/openslx/scripts/idle-daemon-launcher
+++ b/core/modules/idleaction/data/opt/openslx/scripts/idle-daemon-launcher
@@ -29,6 +29,7 @@ if [ -z "${SLX_EXAM}" ]; then
 else
 	# Exam mode active
 	CMD="$CMD --min-idle 7200" # Ignore schedule if idle time is lower than 2h
+	CMD="$CMD --cmd /opt/openslx/scripts/idle-daemon-trigger-wrapper" # Use wrapper for slxlog
 	# Add additional times -- We might miss tightly scheduled ones because of --min-idle
 	if [ -n "$SLX_SHUTDOWN_SCHEDULE" ]; then
 		SLX_SHUTDOWN_SCHEDULE="$SLX_SHUTDOWN_SCHEDULE 23:00 4:00"
diff --git a/core/modules/idleaction/data/opt/openslx/scripts/idle-daemon-trigger-wrapper b/core/modules/idleaction/data/opt/openslx/scripts/idle-daemon-trigger-wrapper
new file mode 100755
index 00000000..0aa681ff
--- /dev/null
+++ b/core/modules/idleaction/data/opt/openslx/scripts/idle-daemon-trigger-wrapper
@@ -0,0 +1,41 @@
+#!/bin/bash
+
+# Executed by the idle-daemon with the desired action:
+# reboot, poweroff, kexec, suspend
+# Normally this is done directly by the idle-daemon, but
+# we use this wrapper script in exam mode so we can report
+# to slx-admin what is happening, and provide idle-daemon
+# logs so we can reconstruct why, hopefully.
+
+[ "$UID" != 0 ] && exit 1
+
+action="$1"
+
+case "$action" in
+reboot|poweroff|suspend|kexec)
+	sleep 1
+	conf=$( mktemp || echo "/tmp/id-$RANDOM-$RANDOM" )
+	{
+		echo "Command:"
+		ps aux | grep -F idle-daemon
+		echo "Config:"
+		grep -F -e TIMEOUT= -e SCHEDULE= /opt/openslx/config
+		echo "Journal:"
+		journalctl -u idle-daemon.service --no-pager
+		echo "Now:"
+		date
+	} &> "$conf"
+	slxlog -s "exam-idledaemon" "Exam mode: Executing action '$action'" "$conf"
+	if [ "$action" = kexec ]; then
+		systemctl --no-block isolate kexec.target
+	else
+		systemctl --no-block "$action"
+	fi
+	;;
+*)
+	slxlog "exam-idledaemon" "Exam mode: Unknown action '$action' from idle-daemon"
+	exit 1
+	;;
+esac
+
+exit 0
-- 
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