False success message in cp command

[mingyu-00]

When attempting to upload a file using the cp command with root privileges, the operation does not actually result in a successful upload. However, the system still returns a success message, which is misleading.

This issue could result in silent failures, especially in automated or CI environments where root-level access might be used. Users may assume the file has been properly uploaded when it hasn't.

We're planning to:

• Add logic to explicitly check whether the process has root privileges before attempting upload.
• Improve error detection and messaging for privileged operations.
• Audit related commands for similar misleading success cases.