control agent can now uboot commands

clitools/pkg/cmd/internal/fwprintenv.go

@@ -0,0 +1,89 @@
+package internal
+
+import (
+	"fmt"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/spf13/cobra"
+	"k8s.io/klog/v2"
+
+	"example.com/monok8s/pkg/system"
+)
+
+func newInternalFWPrintEnvCmd() *cobra.Command {
+	var key string
+	var configPath string
+
+	cmd := &cobra.Command{
+		Use:   "fw-printenv",
+		Short: "Run fw_printenv",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			ctx := cmd.Context()
+
+			key = strings.TrimSpace(key)
+			configPath = strings.TrimSpace(configPath)
+
+			if configPath == "" {
+				configPath = defaultFWEnvConfigPath
+			}
+
+			if _, err := os.Stat(configPath); err != nil {
+				return fmt.Errorf("stat fw env config %q: %w", configPath, err)
+			}
+
+			runner := system.NewRunner(system.RunnerConfig{
+				DefaultTimeout: 15 * time.Second,
+				StreamOutput:   false,
+				Logger:         &system.StdLogger{},
+			})
+
+			runArgs := []string{"-c", configPath}
+			if key != "" {
+				runArgs = append(runArgs, key)
+			}
+
+			res, err := runner.RunWithOptions(
+				ctx,
+				"/fw_printenv",
+				runArgs,
+				system.RunOptions{
+					Quiet: true,
+				},
+			)
+			if err != nil {
+				if res != nil {
+					klog.ErrorS(err, "fw_printenv failed",
+						"key", key,
+						"stdout", strings.TrimSpace(res.Stdout),
+						"stderr", strings.TrimSpace(res.Stderr),
+					)
+				}
+				return err
+			}
+
+			stdout := strings.TrimSpace(res.Stdout)
+			stderr := strings.TrimSpace(res.Stderr)
+
+			if stdout != "" {
+				fmt.Println(stdout)
+			}
+			if stderr != "" {
+				klog.InfoS("fw_printenv stderr", "output", stderr)
+			}
+
+			klog.InfoS("fw_printenv succeeded",
+				"key", key,
+				"configPath", configPath,
+			)
+
+			return nil
+		},
+	}
+
+	cmd.Flags().StringVar(&key, "key", "", "U-Boot environment variable name to print")
+	cmd.Flags().StringVar(&configPath, "config", defaultFWEnvConfigPath, "Path to fw_env.config")
+
+	return cmd
+}