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# lws minimal dbus server
## build
Using libdbus requires additional non-default include paths setting, same as
is necessary for lws build described in ./lib/roles/dbus/README.md
CMake can guess one path and the library name usually, see the README above
for details of how to override for custom libdbus and cross build.
Fedora example:
```
$ cmake .. -DLWS_DBUS_INCLUDE2="/usr/lib64/dbus-1.0/include"
$ make
```
Ubuntu example:
```
$ cmake .. -DLWS_DBUS_INCLUDE2="/usr/lib/x86_64-linux-gnu/dbus-1.0/include"
$ make
```
## usage
Commandline option|Meaning
---|---
-d <loglevel>|Debug verbosity in decimal, eg, -d15
--session | Bind to session bus instead of creating private abstract unix socket
By default the minimal server listens using its own abstract unix socket
at `unix:abstract=org.libwebsockets.test`.
You can also run it instead as a participant on the session bus, without its own
unix socket, by giving `--session`.
### Examples using the default private abstract unix socket
```
$ ./lws-minimal-dbus-server
[2018/10/03 07:08:02:6448] USER: LWS minimal dbus server
[2018/10/03 07:08:02:6693] NOTICE: Creating Vhost 'default' port 0, 1 protocols, IPv6 off
...
```
You can communicate with the dbus server over its private abstract socket using, eg
```
$ gdbus introspect --address unix:abstract=org.libwebsockets.test --dest org.libwebsockets.test --object-path /org/libwebsockets/test
node /org/example/TestObject {
interface org.freedesktop.DBus.Introspectable {
methods:
Introspect(out s data);
signals:
properties:
};
interface org.freedesktop.DBus.Properties {
methods:
Get(in s interface,
...
```
```
$ gdbus call --address unix:abstract=org.libwebsockets.test --dest org.libwebsockets.test --object-path /org/libwebsockets/test --method org.libwebsockets.test.Echo HELLO
('HELLO',)
```
### Examples using the DBUS session bus
```
$ ./lws-minimal-dbus-server --session
[2018/10/03 07:08:02:6448] USER: LWS minimal dbus server
[2018/10/03 07:08:02:6693] NOTICE: Creating Vhost 'default' port 0, 1 protocols, IPv6 off
...
```
You can communicate with the dbus server over the session bus using, eg
```
$ gdbus introspect --session --dest org.libwebsockets.test --object-path /org/libwebsockets/test
node /org/example/TestObject {
interface org.freedesktop.DBus.Introspectable {
methods:
Introspect(out s data);
signals:
properties:
};
interface org.freedesktop.DBus.Properties {
methods:
Get(in s interface,
...
```
```
$ gdbus call --session --dest org.libwebsockets.test --object-path /org/libwebsockets/test --method org.libwebsockets.test.Echo HELLO
('HELLO',)
```
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