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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2015 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package testutil
import (
"bufio"
"fmt"
"os"
"os/exec"
"path/filepath"
"github.com/godbus/dbus/v5"
. "gopkg.in/check.v1"
"github.com/snapcore/snapd/dbusutil"
)
// DBusTest provides a separate dbus session bus for running tests
type DBusTest struct {
tmpdir string
dbusDaemon *exec.Cmd
oldSessionBusEnv string
// the dbus.Conn to the session bus that tests can use
SessionBus *dbus.Conn
}
// sessionBusConfigTemplate is a minimal session dbus daemon
// configuration template for use in the unit tests. In comparison to
// the typical disto session config, it contains no <servicedir>
// directives to avoid activating services installed on the test
// system.
const sessionBusConfigTemplate = `<busconfig>
<type>session</type>
<listen>unix:path=%s/user_bus_socket</listen>
<auth>EXTERNAL</auth>
<policy context="default">
<!-- Allow everything to be sent -->
<allow send_destination="*" eavesdrop="true"/>
<!-- Allow everything to be received -->
<allow eavesdrop="true"/>
<!-- Allow anyone to own anything -->
<allow own="*"/>
</policy>
</busconfig>
`
func (s *DBusTest) SetUpSuite(c *C) {
if _, err := exec.LookPath("dbus-daemon"); err != nil {
c.Skip(fmt.Sprintf("cannot run test without dbus-daemon: %s", err))
return
}
if _, err := exec.LookPath("dbus-launch"); err != nil {
c.Skip(fmt.Sprintf("cannot run test without dbus-launch: %s", err))
return
}
s.tmpdir = c.MkDir()
configFile := filepath.Join(s.tmpdir, "session.conf")
err := os.WriteFile(configFile, []byte(fmt.Sprintf(sessionBusConfigTemplate, s.tmpdir)), 0644)
c.Assert(err, IsNil)
s.dbusDaemon = exec.Command("dbus-daemon", "--print-address", fmt.Sprintf("--config-file=%s", configFile))
s.dbusDaemon.Stderr = os.Stderr
pout, err := s.dbusDaemon.StdoutPipe()
c.Assert(err, IsNil)
err = s.dbusDaemon.Start()
c.Assert(err, IsNil)
scanner := bufio.NewScanner(pout)
scanner.Scan()
c.Assert(scanner.Err(), IsNil)
s.oldSessionBusEnv = os.Getenv("DBUS_SESSION_BUS_ADDRESS")
os.Setenv("DBUS_SESSION_BUS_ADDRESS", scanner.Text())
s.SessionBus, err = dbusutil.SessionBusPrivate()
c.Assert(err, IsNil)
}
func (s *DBusTest) TearDownSuite(c *C) {
if s.SessionBus != nil {
s.SessionBus.Close()
}
os.Setenv("DBUS_SESSION_BUS_ADDRESS", s.oldSessionBusEnv)
if s.dbusDaemon != nil && s.dbusDaemon.Process != nil {
err := s.dbusDaemon.Process.Kill()
c.Assert(err, IsNil)
err = s.dbusDaemon.Wait() // do cleanup
c.Assert(err, ErrorMatches, `(?i)signal: killed`)
}
}
func (s *DBusTest) SetUpTest(c *C) {}
func (s *DBusTest) TearDownTest(c *C) {}
func DBusGetConnectionUnixProcessID(conn *dbus.Conn, name string) (pid int, err error) {
obj := conn.Object("org.freedesktop.DBus", "/org/freedesktop/DBus")
err = obj.Call("org.freedesktop.DBus.GetConnectionUnixProcessID", 0, name).Store(&pid)
return pid, err
}
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