This is a fully function UNIX shell implementation written in C and C++. It parses commands through Lex and Yacc and executes those commands using execvp.
- Parse command using my builtin grammar. This is done by identifying tokens in Lex and constructing it using the grammar in Yacc.
- Identifying if there are any builtin commands, subshells commands, environment variables, etc. within the command before executing.
- Execute the command and setting error code, as well as, clean up for zombie processes.
- Path completion
- Subshells
- I/O commands
- Environment Variables
- Line Editory
- Command History
- You can run it by cloning the repository, running
make, and typing./shell. However, I am still in the process of editing this repository, so it is preferrable to wait before downloading anything right now. In order to exit out of the shell, you just typeexit.