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# How to use DBus config API
Copy the current state from `/{etc,run,lib}/netplan/*.yaml` by creating a new config object
```
$ busctl call io.netplan.Netplan /io/netplan/Netplan io.netplan.Netplan Config
o "/io/netplan/Netplan/config/ULJIU0"
```
Read the merged YAML configuration
```
$ busctl call io.netplan.Netplan /io/netplan/Netplan/config/ULJIU0 io.netplan.Netplan.Config Get
s "network:\n ethernets:\n eth0:\n dhcp4: true\n renderer: networkd\n version: 2\n"
```
Write a new config snippet into `70-snapd.yaml`
```
$ busctl call io.netplan.Netplan /io/netplan/Netplan/config/ULJIU0 io.netplan.Netplan.Config Set ss "ethernets.eth0={dhcp4: false, dhcp6: true}" "70-snapd"
b true
```
Check the newly written configuration
```
$ busctl call io.netplan.Netplan /io/netplan/Netplan/config/ULJIU0 io.netplan.Netplan.Config Get
s "network:\n ethernets:\n eth0:\n dhcp4: false\n dhcp6: true\n renderer: networkd\n version: 2\n"
```
Try to apply the current config object's state
```
$ busctl call io.netplan.Netplan /io/netplan/Netplan/config/ULJIU0 io.netplan.Netplan.Config Try u 20
b true
```
Accept the Try() state within the 20 seconds timeout, if not it will be auto-rejected
```
$ busctl call io.netplan.Netplan /io/netplan/Netplan/config/ULJIU0 io.netplan.Netplan.Config Apply
b true
[SIGNAL] io.netplan.Netplan /io/netplan/Netplan/config/ULJIU0 io.netplan.Netplan.Config Changed() is triggered
[OBJECT] io.netplan.Netplan /io/netplan/Netplan/config/ULJIU0 is removed from the bus
```
Create a new config object and get the merged YAML config
```
$ busctl call io.netplan.Netplan /io/netplan/Netplan io.netplan.Netplan Config
o "/io/netplan/Netplan/config/KC0IU0
$ busctl call io.netplan.Netplan /io/netplan/Netplan/config/KC0IU0 io.netplan.Netplan.Config Get
s "network:\n ethernets:\n eth0:\n dhcp4: false\n dhcp6: true\n renderer: networkd\n version: 2\n"
```
Reject that config object again
```
$ busctl call io.netplan.Netplan /io/netplan/Netplan/config/KC0IU0 io.netplan.Netplan.Config Cancel
b true
[SIGNAL] io.netplan.Netplan /io/netplan/Netplan/config/KC0IU0 io.netplan.Netplan.Config Changed() is triggered
[OBJECT] io.netplan.Netplan /io/netplan/Netplan/config/KC0IU0 is removed from the bus
```
|
