Merge pull request #14113 from dit4c/10348-exec-privileged

Remerge of `docker exec --privileged` with better tests
Upstream-commit: e1f3a5ad0aade527c1b00385652aec21d1cf09ac
Component: engine

components/engine/daemon/execdriver/native/exec.go

@@ -19,7 +19,6 @@ import (
 
 // Exec implements the exec driver Driver interface,
 // it calls libcontainer APIs to execute a container.
-// TODO(vishh): Add support for running in privileged mode.
 func (d *Driver) Exec(c *execdriver.Command, processConfig *execdriver.ProcessConfig, pipes *execdriver.Pipes, startCallback execdriver.StartCallback) (int, error) {
 	active := d.activeContainers[c.ID]
 	if active == nil {
@@ -33,6 +32,10 @@ func (d *Driver) Exec(c *execdriver.Command, processConfig *execdriver.ProcessCo
 		User: processConfig.User,
 	}
 
+	if processConfig.Privileged {
+		p.Capabilities = execdriver.GetAllCapabilities()
+	}
+
 	config := active.Config()
 	if err := setupPipes(&config, processConfig, p, pipes); err != nil {
 		return -1, err