builtin.c

#include "cell.h"

int cell_exit(char **args) //for exit
 {  
    (void)args;
    dbzSpinnerLoading();
    exit(EXIT_SUCCESS);
 }

 int cell_env(char **args) //for env
{
	// exter -> this variable exist but it's defined somewhere else!
	//Because environ is defined in the C runtime and not directly in your program, you need to declare it as extern to tell the compiler:
    //"This variable exists somewhere else, not defined here, but I want to use it.
	extern char	**environ;

	(void)args;
	if (!environ)
		return (1);
	for (int i = 0; environ[i]; i++)
		p("%s\n", environ[i]);
	return (0);
}

int	cell_echo(char **args) //for echo
{
	int start = 1;
	bool newline = true;

	if (!args || !args[0])
		return (1);

	// Check for the -n option
	if (args[1] && !strcmp(args[1], "-n"))
	{
		newline = false;
		start = 2;
	}

	// Print each argument separated by a space
	for (int i = start; args[i]; i++)
	{
		p("%s", args[i]);
		if (args[i + 1])
			p(" ");
	}

	// Print newline if -n option is not present
	if (newline)
		p("\n");

	return (0);
}