src/bin/proxmox-backup-manager.rs: add dns sub command

Also improved the DNS api, added a --delete option.

src/bin/proxmox-backup-manager.rs

@@ -365,6 +365,57 @@ fn network_commands() -> CommandLineInterface {
     cmd_def.into()
 }
 
+#[api(
+    input: {
+        properties: {
+            "output-format": {
+                schema: OUTPUT_FORMAT,
+                optional: true,
+            },
+        }
+    }
+)]
+/// Read DNS settings
+fn get_dns(mut param: Value, rpcenv: &mut dyn RpcEnvironment) -> Result<Value, Error> {
+
+    let output_format = get_output_format(&param);
+
+    param["node"] = "localhost".into();
+
+    let info = &api2::node::dns::API_METHOD_GET_DNS;
+    let mut data = match info.handler {
+        ApiHandler::Sync(handler) => (handler)(param, info, rpcenv)?,
+        _ => unreachable!(),
+    };
+
+
+    let options = default_table_format_options()
+        .column(ColumnConfig::new("search"))
+        .column(ColumnConfig::new("dns1"))
+        .column(ColumnConfig::new("dns2"))
+        .column(ColumnConfig::new("dns3"));
+
+    format_and_print_result_full(&mut data, info.returns, &output_format, &options);
+
+    Ok(Value::Null)
+}
+
+fn dns_commands() -> CommandLineInterface {
+
+    let cmd_def = CliCommandMap::new()
+        .insert(
+            "get",
+            CliCommand::new(&API_METHOD_GET_DNS)
+        )
+        .insert(
+            "set",
+            CliCommand::new(&api2::node::dns::API_METHOD_UPDATE_DNS)
+                .fixed_param("node", String::from("localhost"))
+        );
+
+    cmd_def.into()
+}
+
 #[api(
     input: {
         properties: {
@@ -766,6 +817,7 @@ fn main() {
     let cmd_def = CliCommandMap::new()
         .insert("acl", acl_commands())
         .insert("datastore", datastore_commands())
+        .insert("dns", dns_commands())
         .insert("network", network_commands())
         .insert("user", user_commands())
         .insert("remote", remote_commands())