Worked on the uutils/coreutils repository to address a permissions issue in the Copy command, focusing on environments with restrictive file access. Using Rust and system programming skills, implemented logic to ensure destination directories are created with the owner-write bit set before applying final permissions, preventing errors when copying from read-only source directories. Developed and integrated a regression test to validate that copying succeeds and permissions are correctly applied in these scenarios. This approach improved reliability for scripting and automation workflows, reduced user support issues related to permission errors, and enhanced traceability by referencing the specific commit for review and future maintenance.