Unix Shell

The Unix Shell is a fully functional command-line interpreter built in C as part of the CS14400 course, offering hands-on experience in system-level programming and process control. Designed to mimic core behaviors of traditional Unix shells, it supports job control with foreground and background execution, allowing users to manage multiple processes with ease. The shell features robust output redirection using > and >+, including safeguards to prevent unintended file overwrites and support for safe appending. It accurately resolves executable paths for running external programs and supports both interactive and batch modes, accommodating a variety of usage scenarios. With built-in commands like cd, pwd, and exit, and full support for launching external programs via fork(), execvp(), and wait(), this project demonstrates a comprehensive understanding of Unix internals, system calls, and user-level process management.