Minishell

Minishell is a simple shell implemented in C language, mimicking the functionality of the Bash shell. This minishell has implemented the following key features:

1. Redirection Features

• <: Input redirection
• <<: Input redirection (here document)
• >: Output redirection
• >>: Output redirection (overwrite)

2. Pipe Feature

• |: Communication between commands using pipes

3. Environment Variable Feature

• $: Using environment variables

4. Signal Handling Features

• Ctrl+C: Program termination signal
• Ctrl+D: EOF (End Of File) signal
• Ctrl+: Quit signal

5. Extended Echo Feature

• Echo command with -n option to remove trailing newline character

6. CD Command

• Can only use relative or absolute paths

7. PWD Command

• Print the current working directory if no options are provided

8. Export Command

• Setting environment variables

9. Unset Command

• Removing environment variables

10. Env Command

• Print environment variables if no options or arguments are provided

11. Exit Command

• Exit the shell if no options or arguments are provided

Usage

1. Run the minishell: ./minishell
2. Input commands: You can input any Bash shell commands available.
3. Exit: Use the exit command or Ctrl+D to exit the minishell.

Example

$ ./minishell
$ ls -l > output.txt
$ cat < input.txt | grep "pattern"
$ echo -n "Hello, World!"
$ cd /path/to/directory
$ export MY_VARIABLE=my_value
$ unset MY_VARIABLE
$ env
$ exit