Exporting two dbus objects not possible - go

Question

Using godbus library and according to their server example, I'm trying to export (serve) two different objects with different interfaces. One object path is /a/b/c and another is /a/b/c/d. If I export one of them everything works fine. Even if have no overlap everything works fine(/a/b/c & /w/x/y/z). But exporting /a/b/c & /a/b/c/d results in just having one of them on the dbus. Here is my code:
package main
import (
"fmt"
"os"
"github.com/godbus/dbus/v5"
"github.com/godbus/dbus/v5/introspect"
)
const introP = `
<node>
<interface name="a.b.c.Ping">
<method name="Ping">
<arg direction="out" type="s"/>
</method>
</interface>` + introspect.IntrospectDataString + `</node> `
type ping string
func (p ping) Ping() (string, *dbus.Error) {
fmt.Println(p)
return string(p), nil
}
const introZ = `
<node>
<interface name="a.b.c.d.Zing">
<method name="Zing">
<arg direction="out" type="s"/>
</method>
</interface>` + introspect.IntrospectDataString + `</node> `
type zing string
func (z zing) Zing() (string, *dbus.Error) {
fmt.Println(z)
return string(z), nil
}
func main() {
conn, err := dbus.ConnectSessionBus()
if err != nil {
panic(err)
}
defer conn.Close()
reply, err := conn.RequestName("a.b.c",
dbus.NameFlagDoNotQueue)
if err != nil {
panic(err)
}
if reply != dbus.RequestNameReplyPrimaryOwner {
fmt.Fprintln(os.Stderr, "name already taken")
os.Exit(1)
}
p := ping("Pong")
conn.Export(p, "/a/b/c", "a.b.c.Ping")
conn.Export(introspect.Introspectable(introP), "/a/b/c",
"org.freedesktop.DBus.Introspectable")
z := zing("Zong")
conn.Export(z, "/a/b/c/d", "a.b.c.d.Zing")
conn.Export(introspect.Introspectable(introZ), "/a/b/c/d",
"org.freedesktop.DBus.Introspectable")
fmt.Println("Listening on dbus...")
select {}
}

Answer 1

package main
import (
"fmt"
"os"
"github.com/godbus/dbus/v5"
"github.com/godbus/dbus/v5/introspect"
)
type ping string
func (p ping) Ping() (string, *dbus.Error) {
fmt.Println(p)
return string(p), nil
}
type zing string
func (z zing) Zing() (string, *dbus.Error) {
fmt.Println(z)
return string(z), nil
}
func main() {
conn, err := dbus.SessionBus()
if err != nil {
panic(err)
}
replyP, errP := conn.RequestName("a.b.c.d.Ping",
dbus.NameFlagDoNotQueue)
if errP != nil {
panic(errP)
}
if replyP != dbus.RequestNameReplyPrimaryOwner {
fmt.Fprintln(os.Stderr, "name already taken")
os.Exit(1)
}
p := ping("Pong")
var introP = &introspect.Node{
Name: "/a/b/c/d/Ping",
Interfaces: []introspect.Interface{
introspect.IntrospectData,
{
Name: "a.b.c.d.Ping",
Methods: introspect.Methods(p),
},
},
}
conn.Export(p, "/a/b/c/d/Ping", "a.b.c.d.Ping")
z := zing("Zong")
var introZ = &introspect.Node{
Name: "/a/b/c/Zing",
Interfaces: []introspect.Interface{
introspect.IntrospectData,
{
Name: "a.b.c.Zing",
Methods: introspect.Methods(z),
},
},
}
conn.Export(z, "/a/b/c/Zing", "a.b.c.Zing")
conn.Export(introspect.NewIntrospectable(&introspect.Node{
Name: "/",
Children: []introspect.Node{
{
Name: "a",
},
},
}), "/", "org.freedesktop.DBus.Introspectable")
conn.Export(introspect.NewIntrospectable(&introspect.Node{
Name: "/a",
Children: []introspect.Node{
{
Name: "b",
},
},
}), "/com", "org.freedesktop.DBus.Introspectable")
conn.Export(introspect.NewIntrospectable(&introspect.Node{
Name: "/a/b",
Children: []introspect.Node{
{
Name: "c",
},
},
}), "/a/b", "org.freedesktop.DBus.Introspectable")
conn.Export(introspect.NewIntrospectable(&introspect.Node{
Name: "/a/b/c",
Children: []introspect.Node{
{
Name: "d",
},
{
Name: "Zing",
},
},
}), "/a/b/c", "org.freedesktop.DBus.Introspectable")
conn.Export(introspect.NewIntrospectable(&introspect.Node{
Name: "/a/b/c/d",
Children: []introspect.Node{
{
Name: "Ping",
},
},
}), "/a/b/c/d", "org.freedesktop.DBus.Introspectable")
conn.Export(introspect.NewIntrospectable(introP), "/a/b/c/d/Ping",
"org.freedesktop.DBus.Introspectable")
conn.Export(introspect.NewIntrospectable(introZ), "/a/b/c/Zing",
"org.freedesktop.DBus.Introspectable")
fmt.Printf("Listening on %s / %s ...\n", "a.b.c...", "/a/b/c...")
select {}
}