Add --preservefds to podman run

Add --preservefds to podman run. close https://github.com/containers/libpod/issues/6458

Signed-off-by: Qi Wang <qiwan@redhat.com>

pkg/domain/entities/containers.go

@@ -294,6 +294,7 @@ type ContainerRunOptions struct {
 	ErrorStream  *os.File
 	InputStream  *os.File
 	OutputStream *os.File
+	PreserveFDs  uint
 	Rm           bool
 	SigProxy     bool
 	Spec         *specgen.SpecGenerator

pkg/specgen/generate/container_create.go

@@ -104,6 +104,10 @@ func MakeContainer(ctx context.Context, rt *libpod.Runtime, s *specgen.SpecGener
 		return nil, err
 	}
 
+	if s.PreserveFDs > 0 {
+		options = append(options, libpod.WithPreserveFDs(s.PreserveFDs))
+	}
+
 	opts, err := createContainerOptions(ctx, rt, s, pod, finalVolumes, newImage)
 	if err != nil {
 		return nil, err

pkg/specgen/specgen.go

@@ -130,6 +130,11 @@ type ContainerBasicConfig struct {
 	// Remove indicates if the container should be removed once it has been started
 	// and exits
 	Remove bool `json:"remove"`
+	// PreserveFDs is a number of additional file descriptors (in addition
+	// to 0, 1, 2) that will be passed to the executed process. The total FDs
+	// passed will be 3 + PreserveFDs.
+	// set tags as `json:"-"` for not supported remote
+	PreserveFDs uint `json:"-"`
 }
 
 // ContainerStorageConfig contains information on the storage configuration of a