v2 podman unshare command

add unshare command

add cp and init to container sub-command

allow mount to run as rootless

Signed-off-by: Brent Baude <bbaude@redhat.com>

3 files changed, 21 insertions, 0 deletions

diff --git a/pkg/domain/entities/engine_container.go b/pkg/domain/entities/engine_container.go
index 7c93e6802..bb13794bd 100644
--- a/pkg/domain/entities/engine_container.go
+++ b/pkg/domain/entities/engine_container.go
@@ -71,6 +71,7 @@ type ContainerEngine interface {
 	SetupRootless(ctx context.Context, cmd *cobra.Command) error
 	Shutdown(ctx context.Context)
 	SystemDf(ctx context.Context, options SystemDfOptions) (*SystemDfReport, error)
+	Unshare(ctx context.Context, args []string) error
 	VarlinkService(ctx context.Context, opts ServiceOptions) error
 	VolumeCreate(ctx context.Context, opts VolumeCreateOptions) (*IdOrNameResponse, error)
 	VolumeInspect(ctx context.Context, namesOrIds []string, opts VolumeInspectOptions) ([]*VolumeInspectReport, error)
diff --git a/pkg/domain/infra/abi/system.go b/pkg/domain/infra/abi/system.go
index 24c62465f..fc92da1b2 100644
--- a/pkg/domain/infra/abi/system.go
+++ b/pkg/domain/infra/abi/system.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
+	"os/exec"
 	"path/filepath"
 	"strconv"
 	"syscall"
@@ -391,3 +392,18 @@ func (s SystemEngine) Shutdown(ctx context.Context) {
 		logrus.Error(err)
 	}
 }
+
+func unshareEnv(graphroot, runroot string) []string {
+	return append(os.Environ(), "_CONTAINERS_USERNS_CONFIGURED=done",
+		fmt.Sprintf("CONTAINERS_GRAPHROOT=%s", graphroot),
+		fmt.Sprintf("CONTAINERS_RUNROOT=%s", runroot))
+}
+
+func (ic *ContainerEngine) Unshare(ctx context.Context, args []string) error {
+	cmd := exec.Command(args[0], args[1:]...)
+	cmd.Env = unshareEnv(ic.Libpod.StorageConfig().GraphRoot, ic.Libpod.StorageConfig().RunRoot)
+	cmd.Stdin = os.Stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	return cmd.Run()
+}
diff --git a/pkg/domain/infra/tunnel/system.go b/pkg/domain/infra/tunnel/system.go
index 448fbed1f..d00795741 100644
--- a/pkg/domain/infra/tunnel/system.go
+++ b/pkg/domain/infra/tunnel/system.go
@@ -30,3 +30,7 @@ func (ic *ContainerEngine) SystemPrune(ctx context.Context, options entities.Sys
 func (ic *ContainerEngine) SystemDf(ctx context.Context, options entities.SystemDfOptions) (*entities.SystemDfReport, error) {
 	panic(errors.New("system df is not supported on remote clients"))
 }
+
+func (ic *ContainerEngine) Unshare(ctx context.Context, args []string) error {
+	return errors.New("unshare is not supported on remote clients")
+}