This is a simple Linux/Unix shell that allows for commands with arguments to be executed. This was written for learning the basics of shell programming.
This shell contains three shell built-in commands:
environment - The shell will print a list of the environment variables and values.
path - The shell will print the value of the PATH environment variable.
exit - The shell will exit with status 0.
If a user enters a command, the shell will fork into a subprocess.
The shell will wait for the command to complete and then exit the subprocess.
This shell will only work on a Linux/Unix system.
First, you must compile the shell by typing " gcc -o shelltest shell_lab_djs ".
Then you can simply run the shell by typing " ./shelltest ".
Here is an example of the shell executing the commands: date, ps, and free.
The shell first prints "Welcome to the Shell!".
Once a command is entered, it prints "Child Process Running..." to indicate the forked process.
After the command is completed, the shell prints "Child Process Complete" to indicate a successfull execution.
When finished, the "exit" built-in command can be entered which causes the shell to exit with status 0.