Desktop applications and system services exchange method calls and signals through a common message bus.
This mechanism does not directly create device nodes.
Which mechanism is appropriate?
D-Bus mediates interprocess messages between clients and services through system and session buses.
Detailed explanation
Incorrect. udev manages device nodes and links in response to device events.
Incorrect. sysfs exposes kernel objects and device attributes.
Incorrect. procfs exposes process and kernel state through virtual files.
Correct. D-Bus brokers method calls and signals between processes.
Try it yourself
An example you can run in a temporary verification environment.
busctl --help | sed -n '1,10p'Expected result
list、status、monitor、call等のバス操作Key points
- D-Bus is an IPC message bus
- System and session buses differ
- It is distinct from udev
Notes
- Environment: systemd busctl / ヘルプ表示のみ
- Prefer read-only inspection or a disposable system when testing hardware commands.
- Device visibility and module behavior depend on the host and virtualization environment.
Foundation review
Place the operation
D-Bus transports messages and method calls; sysfs and procfs expose state.
Check the side effect
Inspect bus names and permissions before invoking a service method.