podman: support --userns=ns|container

allow to join the user namespace of another container.

Closes: https://github.com/containers/libpod/issues/3629

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/libpod/options.go b/libpod/options.go
index 8d41764a9..81d3aa64f 100644
--- a/libpod/options.go
+++ b/libpod/options.go
@@ -847,6 +847,7 @@ func WithUserNSFrom(nsCtr *Container) CtrCreateOption {
 		}
 
 		ctr.config.UserNsCtr = nsCtr.ID()
+		ctr.config.IDMappings = nsCtr.config.IDMappings
 
 		return nil
 	}