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Description
This project is an implementation of the shell created as a Milestone Project for the C code at ALX Africa Software Engineering.
The gates of shell is a project in the first trimester, that helps student to understand the advanced
concepts behind the shell program include process, system call, 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 (C) 2022 by Reny Kipkoech and Stellah Mbao
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 14.04 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.
- Hndling 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/StellahMbao/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 .