This is a simple UNIX command intepreter that is part of the ALX low-level programming and algorithm curriculumn.

A simple UNIX command language intepreter that reads commands from a file or standard input and executes them.

Usage: main [filename]

To invoke its usage, compile all .c files in the repository and run the resulting executable:

gcc *.c -o main
./main

main can be invoked both interactively and non-interactively. If main is invoked with standard input not connected to a terminal, it reads and executes the commands it has recieved in
order.

Example:

$ echo "echo 'hello'" | ./main
'hello'
$

If main is invoked with standard input connected to a terminal, an interactive shell is opened. When executing interactively, main displays the prompt $ when it is ready to read a
command.

Example:

$./main
$

Alternatively, if the command line arguments are supplied upon invocation, main treats the first argument as a file from which to read commands. The supplied file should contain one comma
nd per line. main runs each of the commands contained in the file in order before exiting.

Example:

$ cat test
echo 'hello'
$ ./main test
'hello'
$

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