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