cp: do not allow dir->file copying

Fix a bug in `podman-cp` to forbid copying directories to files.
Previously, the directory was copied to the parent directory of the file
which is wrong.

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

1 files changed, 8 insertions, 0 deletions

diff --git a/cmd/podman/containers/cp.go b/cmd/podman/containers/cp.go
index 2c7d72b20..0ad258824 100644
--- a/cmd/podman/containers/cp.go
+++ b/cmd/podman/containers/cp.go
@@ -177,6 +177,10 @@ func copyFromContainer(container string, containerPath string, hostPath string)
 		containerTarget = filepath.Dir(containerTarget)
 	}
 
+	if !isStdout && containerInfo.IsDir && !hostInfo.IsDir {
+		return errors.New("destination must be a directory when copying a directory")
+	}
+
 	reader, writer := io.Pipe()
 	hostCopy := func() error {
 		defer reader.Close()
@@ -334,6 +338,10 @@ func copyToContainer(container string, containerPath string, hostPath string) er
 		stdinFile = tmpFile.Name()
 	}
 
+	if hostInfo.IsDir && !containerInfo.IsDir {
+		return errors.New("destination must be a directory when copying a directory")
+	}
+
 	reader, writer := io.Pipe()
 	hostCopy := func() error {
 		defer writer.Close()