Worked on the uutils/coreutils repository to enhance the security and reliability of fuzz testing workflows. Addressed a key bug by replacing unsafe libc::dup calls with rustix::io::dup, implementing safe file descriptor duplication within the fuzzing tests. This change reduced the risks associated with direct libc usage and aligned the codebase with Rust-native system programming practices. Focused on improving the maintainability and safety of the fuzzing infrastructure, the work leveraged expertise in Rust, fuzz testing, and low-level system programming. The update contributed to a more robust testing environment, ensuring safer handling of file descriptors during automated fuzzing processes.