msh is a simple shell program implemented in C that handles basic built-in commands such as echo, exit, and type, along with the ability to execute external commands by searching for them in the system's PATH. The shell supports command-line parsing, forking processes, and executing commands.

• Built-in Commands:

  • echo: Prints arguments to the terminal.
  • exit: Exits the shell.
  • type: Displays the type (built-in or path) of the given command.

• External Command Execution:

  • Executes external commands by searching for them in the system's PATH.
  • Forks a child process to execute commands.

To run the program, use the following make command:

make run

To compile the program, use the following gcc command:

gcc -o msh main.c

This will produce an executable file named msh.

After compiling the program, you can run the shell by executing the following command in your terminal:

./msh

This will start the interactive shell prompt, where you can type commands.

1. echo <text>:

   • Prints the provided text to the console.

   Example:

   $ echo Hello World
   Hello World

2. exit:

   • Exits the shell.

   Example:

   $ exit

3. type <command>:

   • Displays the type of the command (builtin or path to the executable).

   Example:

   $ type ls
   ls is /bin/ls

4. External Commands:

   • Any other command is treated as an external command. The shell will search for the command in the directories listed in the PATH environment variable and execute it if found.

   Example:

   $ ls

• If a command is not found, the shell will display an error message:

  $ nonexistent_command
  nonexistent_command: command not found

• If the type command is used without any arguments:

  $ type
  type: missing operand

This project is licensed under the MIT License.

Feel free to fork this repository and submit pull requests with improvements or bug fixes!