From 78e9bb837c258ac0ec7712b3d612cc2f407e731e Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 12 Jun 2024 05:50:42 +0200
Subject: Merging upstream version 256.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../TEST-80-NOTIFYACCESS.units/test.sh             | 63 ++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100755 test/TEST-80-NOTIFYACCESS/TEST-80-NOTIFYACCESS.units/test.sh

(limited to 'test/TEST-80-NOTIFYACCESS/TEST-80-NOTIFYACCESS.units/test.sh')

diff --git a/test/TEST-80-NOTIFYACCESS/TEST-80-NOTIFYACCESS.units/test.sh b/test/TEST-80-NOTIFYACCESS/TEST-80-NOTIFYACCESS.units/test.sh
new file mode 100755
index 0000000..565ed8d
--- /dev/null
+++ b/test/TEST-80-NOTIFYACCESS/TEST-80-NOTIFYACCESS.units/test.sh
@@ -0,0 +1,63 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+# shellcheck disable=SC2016
+set -eux
+set -o pipefail
+
+sync_in() {
+    read -r x < /tmp/syncfifo2
+    test "$x" = "$1"
+}
+
+sync_out() {
+    echo "$1" > /tmp/syncfifo1
+}
+
+export SYSTEMD_LOG_LEVEL=debug
+
+echo "toplevel PID: $BASHPID"
+
+systemd-notify --status="Test starts"
+sync_out a
+sync_in b
+(
+    echo "subshell PID: $BASHPID"
+
+    # Make us main process
+    systemd-notify --pid="$BASHPID"
+
+    # Lock down access to just us
+    systemd-notify "NOTIFYACCESS=main"
+
+    # This should still work
+    systemd-notify --status="Sending READY=1 in an unprivileged process"
+
+    # Send as subprocess of the subshell, this should not work
+    systemd-notify --ready --pid=self --status "BOGUS1"
+
+    sync_out c
+    sync_in d
+
+    # Move main process back to toplevel
+    systemd-notify --pid=parent "MAINPID=$$"
+
+    # Should be dropped again
+    systemd-notify --status="BOGUS2" --pid=parent
+
+    # Apparently, bash will automatically invoke the last command in a subshell
+    # via a simple execve() rather than fork()ing first. But we want that the
+    # previous command uses the subshell's PID, hence let's insert a final,
+    # bogus redundant command as last command to run in the subshell, so that
+    # bash can't optimize things like that.
+    echo "bye"
+)
+
+echo "toplevel again: $BASHPID"
+
+systemd-notify --ready --status="OK"
+systemd-notify "NOTIFYACCESS=none"
+systemd-notify --status="BOGUS3"
+
+sync_out e
+
+exec sleep infinity
-- 
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