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82 lines
2.0 KiB
82 lines
2.0 KiB
/*
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Copyright 2015 CoreOS Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Integration with the systemd machined API. See http://www.freedesktop.org/wiki/Software/systemd/machined/
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package machine1
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import (
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"os"
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"strconv"
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"github.com/godbus/dbus"
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)
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const (
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dbusInterface = "org.freedesktop.machine1.Manager"
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dbusPath = "/org/freedesktop/machine1"
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)
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// Conn is a connection to systemds dbus endpoint.
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type Conn struct {
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conn *dbus.Conn
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object dbus.BusObject
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}
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// New() establishes a connection to the system bus and authenticates.
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func New() (*Conn, error) {
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c := new(Conn)
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if err := c.initConnection(); err != nil {
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return nil, err
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}
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return c, nil
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}
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func (c *Conn) initConnection() error {
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var err error
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c.conn, err = dbus.SystemBusPrivate()
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if err != nil {
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return err
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}
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// Only use EXTERNAL method, and hardcode the uid (not username)
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// to avoid a username lookup (which requires a dynamically linked
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// libc)
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methods := []dbus.Auth{dbus.AuthExternal(strconv.Itoa(os.Getuid()))}
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err = c.conn.Auth(methods)
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if err != nil {
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c.conn.Close()
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return err
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}
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err = c.conn.Hello()
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if err != nil {
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c.conn.Close()
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return err
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}
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c.object = c.conn.Object("org.freedesktop.machine1", dbus.ObjectPath(dbusPath))
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return nil
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}
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// RegisterMachine registers the container with the systemd-machined
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func (c *Conn) RegisterMachine(name string, id []byte, service string, class string, pid int, root_directory string) error {
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return c.object.Call(dbusInterface+".RegisterMachine", 0, name, id, service, class, uint32(pid), root_directory).Err
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}
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