A simple UNIX command interpreter that replicates functionalities of the simple shell (sh):
Basics of programming, Basics of C, and Basics of thinking like an engineer implemented.
Additional functions are also included.
This program was entirely written in C as a milestone project for ALX Africa Software Engineering.
Clone this repository into your working directory. Files should be compiled with GCC and the following flags: -Wall -Wextra -Werror -pedantic -std=gnu89
After compilation, the resulting program can run stand-alone, either in interactive or non-interactive mode.
In interactive mode, simply run the program and wait for the prompt to appear.
From there, you can type commands freely, exiting with either the "exit" command or ctrl-D.
In non-interactive mode, echo your desired command and pipe it into the program like this:
echo "cd" | ./shell
In non-interactive mode, the program will exit after finishing your desired command(s).
Our shell has support for the following built-in commands:
| Command | Definition |
|---|---|
| env | Print the environment. |
| cd [dir] | Change the directory. |
| unsetenv [var] | Remove an environment variable. |
| help [built-in] | Read documentation for a built-in |
| exit [n] | Exit the shell, with an optional exit status, n. |
| setenv [var][value] | Set an environment variable and value. If the variable exists, the value will be updated. |