Initial implementation of mac forwarding using a privileged docker sock claim helper

Signed-off-by: Jason T. Greene <jason.greene@redhat.com>

cmd/podman-mac-helper/uninstall.go

@@ -0,0 +1,60 @@
+//go:build darwin
+// +build darwin
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+)
+
+var uninstallCmd = &cobra.Command{
+	Use:    "uninstall",
+	Short:  "uninstalls the podman helper agent",
+	Long:   "uninstalls the podman helper agent, which manages the /var/run/docker.sock link",
+	PreRun: silentUsage,
+	RunE:   uninstall,
+}
+
+func init() {
+	addPrefixFlag(uninstallCmd)
+	rootCmd.AddCommand(uninstallCmd)
+}
+
+func uninstall(cmd *cobra.Command, args []string) error {
+	userName, _, _, err := getUser()
+	if err != nil {
+		return err
+	}
+
+	labelName := fmt.Sprintf("com.github.containers.podman.helper-%s", userName)
+	fileName := filepath.Join("/Library", "LaunchDaemons", labelName+".plist")
+
+	if err = runDetectErr("launchctl", "unload", fileName); err != nil {
+		// Try removing the service by label in case the service is half uninstalled
+		if rerr := runDetectErr("launchctl", "remove", labelName); rerr != nil {
+			// Exit code 3 = no service to remove
+			if exitErr, ok := rerr.(*exec.ExitError); !ok || exitErr.ExitCode() != 3 {
+				fmt.Fprintf(os.Stderr, "Warning: service unloading failed: %s\n", err.Error())
+				fmt.Fprintf(os.Stderr, "Warning: remove also failed: %s\n", rerr.Error())
+			}
+		}
+	}
+
+	if err := os.Remove(fileName); err != nil {
+		if !os.IsNotExist(err) {
+			return errors.Errorf("could not remove plist file: %s", fileName)
+		}
+	}
+
+	helperPath := filepath.Join(installPrefix, "podman", "helper", userName)
+	if err := os.RemoveAll(helperPath); err != nil {
+		return errors.Errorf("could not remove helper binary path: %s", helperPath)
+	}
+	return nil
+}