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Description
This project is an implementation of the shell created as a Milestone Project for C code at ALX Africa Software Engineering.
The gates of shell is a project in the first sprint of the program that helps students to understand the advanced
concepts behind the shell program such as processes, system calls, bit manipulation, file managment, error handling ...
Shell is a simple UNIX command interpreter that replicates functionalities of the simple shell (sh).
This program was written entirely in C Language.
Copyright ©️ 2023 by Anozie Chibuike and Bupe Mwansa
All rights reserved
This is a shell written in C. It is based on the Thompson Shell.
Our shell was built and tested on Ubuntu 20.04 LTS.
- Display a prompt and wait for the user to type a command. A command line always ends with a new line.
- If an executable cannot be found, print an error message and display the prompt again.
- Handle errors.
- Handling the “end of file” condition (Ctrl+D)
- Hanling the command line with arguments
- Handle the PATH
- Support the exit features and the exit status
- Handle the Ctrl-C to not terminate the shell
- Handling the command seperator
; - Handling
&&and||logical operators - Handle variable replacements
$?and$$ - Handle the comments
# - Support the history feature
- Support the file input
Our shell has support for the following built-in commands:
| Command | Definition |
|---|---|
| exit [n] | Exit the shell, with an optional exit status, n. |
| env | Print the environment. |
| setenv [var][value] | Set an environment variable and value. If the variable exists, the value will be updated. |
| alias[name[='value]] | Reads aliases name |
| unsetenv [var] | Remove an environment variable. |
| cd [dir] | Change the directory. |
| help [built-in] | Read documentation for a built-in. |
Clone the below repository and compile the files into an executable using the GCC compiler.
https://github.com/AnozieChibuike/simple_shell.git
- First, Fork this Repository Learn how to fork repo.
- Then Clone Learn how to clone .
- Create an executable by running the following command:
gcc -Wall -Werror -Wextra -pedantic *.c -o hsh- From there, type in the following command and press your enter button.
./hsh- Final step: ENJOY!
ls -la
- The creators of the C language.
- Our software engineer-in-residence.
- Betty Holberton | Alx-Africa .