podman cp: ignore EPERMs in rootless mode

Ignore permission errors when copying from a rootless container.
TTY devices inside rootless containers are owned by the host's
root user which is "nobody" inside the container's user namespace
rendering us unable to even read them.

Enable the integration test which was temporarily disabled for rootless
users.

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/docs/source/markdown/podman-cp.1.md b/docs/source/markdown/podman-cp.1.md
index 56511c244..bafbbdf3b 100644
--- a/docs/source/markdown/podman-cp.1.md
+++ b/docs/source/markdown/podman-cp.1.md
@@ -57,6 +57,8 @@ If you use a : in a local machine path, you must be explicit with a relative or
 
 Using `-` as the *src_path* streams the contents of STDIN as a tar archive. The command extracts the content of the tar to the *DEST_PATH* in the container. In this case, *dest_path* must specify a directory. Using `-` as the *dest_path* streams the contents of the resource (can be a directory) as a tar archive to STDOUT.
 
+Note that `podman cp` ignores permission errors when copying from a running rootless container.  The TTY devices inside a rootless container are owned by the host's root user and hence cannot be read inside the container's user namespace.
+
 ## OPTIONS
 
 ## ALTERNATIVES