test: add shutdown test

Wraps nspawn to be able to use pexpect. The test logs in on the console
and runs screen. In one screen window it types in shutdown commands and
checks whether a wall message was sent to the other.

test/TEST-69-SHUTDOWN/Makefile

@@ -0,0 +1 @@
+../TEST-01-BASIC/Makefile

test/TEST-69-SHUTDOWN/test.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+set -e
+
+TEST_DESCRIPTION="shutdown testing"
+IMAGE_NAME="shutdown"
+TEST_NO_QEMU=1
+
+# shellcheck source=test/test-functions
+. "${TEST_BASE_DIR:?}/test-functions"
+
+_ORIG_NSPAWN="$SYSTEMD_NSPAWN"
+SYSTEMD_NSPAWN="$STATEDIR/run-nspawn"
+
+setup_nspawn_root_hook() {
+    cat > "$STATEDIR"/run-nspawn <<-EOF
+	#!/bin/bash
+	exec "$TEST_BASE_DIR"/test-shutdown.py -- "$_ORIG_NSPAWN" "\$@"
+	exit 1
+	EOF
+    chmod 755 "$STATEDIR"/run-nspawn
+}
+
+test_append_files() {
+    # prevent shutdown in test suite, the expect script does that manually.
+    rm "$1"/usr/lib/systemd/tests/testdata/units/end.service
+    inst /usr/bin/screen
+    echo "PS1='screen\$WINDOW # '" > "$1"/etc/bash.bashrc
+    echo 'startup_message off' > "$1"/etc/screenrc
+    echo 'bell_msg ""' >> "$1"/etc/screenrc
+}
+
+do_test "$@"

test/test-functions

@@ -1884,6 +1884,8 @@ has_user_dbus_socket() {
     fi
 }
 
+setup_nspawn_root_hook() { :;}
+
 setup_nspawn_root() {
     if [ -z "${initdir}" ]; then
         dfatal "\$initdir not defined"
@@ -1896,6 +1898,8 @@ setup_nspawn_root() {
         ddebug "cp -ar $initdir $TESTDIR/unprivileged-nspawn-root"
         cp -ar "$initdir" "$TESTDIR/unprivileged-nspawn-root"
     fi
+
+    setup_nspawn_root_hook
 }
 
 setup_basic_dirs() {

test/test-shutdown.py

@@ -0,0 +1,114 @@
+#!/usr/bin/python3
+# SPDX-License-Identifier: LGPL-2.1-or-later
+#
+
+import argparse
+import logging
+import pexpect
+import sys
+
+
+def run(args):
+
+    ret = 1
+    logger = logging.getLogger("test-shutdown")
+
+    logger.info("spawning test")
+    console = pexpect.spawn(args.command, args.arg, env={
+            "TERM": "linux",
+        }, encoding='utf-8', timeout=30)
+
+    if args.verbose:
+        console.logfile = sys.stdout
+
+    logger.debug("child pid %d" % console.pid)
+
+    try:
+        logger.info("waiting for login prompt")
+        console.expect('H login: ', 10)
+
+        logger.info("log in and start screen")
+        console.sendline('root')
+        console.expect('bash.*# ', 10)
+        console.sendline('screen')
+        console.expect('screen0 ', 10)
+        console.sendcontrol('a')
+        console.send('c')
+        console.expect('screen1 ', 10)
+
+#        console.interact()
+
+        console.sendline('tty')
+        console.expect(r'/dev/(pts/\d+)')
+        pty = console.match.group(1)
+        logger.info("window 1 at line %s", pty)
+
+        logger.info("schedule reboot")
+        console.sendline('shutdown -r')
+        console.expect("Reboot scheduled for (?P<date>.*), use 'shutdown -c' to cancel", 2)
+        date = console.match.group('date')
+        logger.info("reboot scheduled for %s", date)
+
+        console.sendcontrol('a')
+        console.send('0')
+        logger.info("verify broadcast message")
+        console.expect('Broadcast message from root@H on %s' % pty, 2)
+        console.expect('The system is going down for reboot at %s' % date, 2)
+
+        logger.info("check show output")
+        console.sendline('shutdown --show')
+        console.expect("Reboot scheduled for %s, use 'shutdown -c' to cancel" % date, 2)
+
+        logger.info("cancel shutdown")
+        console.sendline('shutdown -c')
+        console.sendcontrol('a')
+        console.send('1')
+        console.expect('The system shutdown has been cancelled', 2)
+
+        logger.info("call for reboot")
+        console.sendline('sleep 10; shutdown -r now')
+        console.sendcontrol('a')
+        console.send('0')
+        console.expect("The system is going down for reboot NOW!", 12)
+
+        logger.info("waiting for reboot")
+
+        console.expect('H login: ', 10)
+        console.sendline('root')
+        console.expect('bash.*# ', 10)
+
+        console.sendline('> /testok')
+
+        logger.info("power off")
+        console.sendline('poweroff')
+
+        logger.info("expect termination now")
+        console.expect(pexpect.EOF)
+
+        ret = 0
+    except Exception as e:
+        logger.error(e)
+        logger.info("killing child pid %d" % console.pid)
+        console.terminate()
+
+    return ret
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(description='test logind shutdown feature')
+    parser.add_argument("-v", "--verbose", action="store_true", help="verbose")
+    parser.add_argument("command", help="command to run")
+    parser.add_argument("arg", nargs='*', help="args for command")
+
+    args = parser.parse_args()
+
+    if args.verbose:
+        level = logging.DEBUG
+    else:
+        level = logging.INFO
+
+    logging.basicConfig(level=level)
+
+    sys.exit(run(args))
+
+# vim: sw=4 et

test/units/testsuite-69.service

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+[Unit]
+Description=TEST-69-SHUTDOWN
+
+[Service]
+Type=oneshot
+ExecStart=/usr/lib/systemd/tests/testdata/units/%N.sh