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+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+set -e
+
+TEST_DESCRIPTION="Test various scenarios involving transition from/to initrd"
+# Note: for debugging systemd.journald.max_level_console=debug might come in handy
+# as well, but it's not used here since it's _very_ noisy and slows the test
+# down a lot
+KERNEL_APPEND="${KERNEL_APPEND:-} systemd.journald.forward_to_console=1"
+TEST_NO_NSPAWN=1
+
+# shellcheck source=test/test-functions
+. "${TEST_BASE_DIR:?}/test-functions"
+
+test_append_files() {
+ local workspace="${1:?}"
+ local sd_initrd file dir
+
+ # Create a shutdown initrd
+ #
+ # This should provide coverage for shutdown initrd related issues, see:
+ # - https://github.com/systemd/systemd/issues/28645
+ # - https://github.com/systemd/systemd/pull/28648
+ # - https://github.com/systemd/systemd/pull/28793
+ #
+ # This is a bit messier than I originally anticipated, as installing our own libraries
+ # is handled implicitly by install_systemd() which I don't want to use here, since
+ # I need only the systemd-shutdown binary
+ sd_initrd="$workspace/shutdown-initrd"
+ mkdir -p "$sd_initrd/etc" "$sd_initrd/usr"
+ initdir="$sd_initrd" image_install bash /usr/lib/os-release
+ ln -srf "$sd_initrd/usr/lib/os-release" "$sd_initrd/etc/initrd-release"
+ initdir="$sd_initrd" inst_binary "$workspace/usr/lib/systemd/systemd-shutdown" "/usr/lib/systemd/systemd-shutdown"
+ initdir="$sd_initrd" inst_libs "$sd_initrd/usr/lib/systemd/systemd-shutdown"
+ # We need to deal with libsystemd stuff explicitly, as we don't call install_systemd() here
+ while read -r file; do
+ initdir="$sd_initrd" inst_library "$file" "${file##"$workspace"}"
+ initdir="$sd_initrd" inst_libs "$file"
+ done < <(find "$workspace/usr/" -name "libsystemd*.so*")
+ # Call systemd-shutdown indirectly, so we can show a message that we can check for
+ # later to make sure the shutdown initrd was actually executed
+ cat >"$sd_initrd/shutdown" <<\EOF
+#!/usr/bin/bash -eu
+echo "Hello from shutdown initrd"
+exec /usr/lib/systemd/systemd-shutdown "$@"
+EOF
+ chmod +x "$sd_initrd/shutdown"
+}
+
+check_result_qemu_hook() {
+ local workspace="${1:?}"
+ local console_log="${TESTDIR:?}/console.log"
+
+ if [[ -e "$workspace/skipped" ]]; then
+ return 0
+ fi
+
+ if [[ ! -e "$console_log" ]]; then
+ dfatal "Missing console log - this shouldn't happen"
+ return 1
+ fi
+
+ # The console log should not contain messages like:
+ # [ 6.245000] systemd-shutdown[1]: Failed to move /run/initramfs to /: Invalid argument
+ # [ 6.245955] systemd-shutdown[1]: Failed to switch root to "/run/initramfs": Invalid argument
+ if grep -qE "systemd-shutdown.+: Failed to move /run/initramfs" "$console_log" ||
+ grep -qE "systemd-shutdown.+: Failed to switch root" "$console_log"; then
+ derror "sd-shutdown failed to switch root in shutdown initrd"
+ return 1
+ fi
+
+ # Check if the shutdown initrd was executed at all
+ if ! grep -qE "^Hello from shutdown initrd\s*$" "$console_log"; then
+ derror "Missing 'hello' message from shutdown initrd"
+ return 1
+ fi
+
+ return 0
+}
+
+# Setup a one shot service in initrd that creates a dummy bind mount under /run
+# to check if the mount persists though the initrd transition. The "check" part
+# is in the respective testsuite-08.sh script.
+#
+# See: https://github.com/systemd/systemd/issues/28452
+run_qemu_hook() {
+ local extra="${TESTDIR:?}/initrd.extra"
+
+ mkdir -m 755 "$extra"
+ mkdir -m 755 "$extra/etc" "$extra/etc/systemd" "$extra/etc/systemd/system" "$extra/etc/systemd/system/initrd.target.wants"
+
+ cat >"$extra/etc/systemd/system/initrd-run-mount.service" <<EOF
+[Unit]
+Description=Create a mount in /run that should survive the transition from initrd
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=mkdir /run/initrd-mount-source /run/initrd-mount-target
+ExecStart=mount -v --bind /run/initrd-mount-source /run/initrd-mount-target
+ExecStart=cp -v /etc/initrd-release /run/initrd-mount-target/hello-world
+EOF
+ ln -svrf "$extra/etc/systemd/system/initrd-run-mount.service" "$extra/etc/systemd/system/initrd.target.wants/initrd-run-mount.service"
+
+ (cd "$extra" && find . | cpio -o -H newc -R root:root > "$extra.cpio")
+
+ INITRD_EXTRA="$extra.cpio"
+}
+
+do_test "$@"