simple_shell/builtin.c at main · abdelrahmann22/simple_shell · GitHub

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#include "shell.h"

/**
 * builtin_env - shows the environment where the shell runs
 * @data: struct for the program's data
 * Return: zero if sucess, or other number if its declared in the arguments
 */
int builtin_env(data_of_program *data)
{
	int i;
	char cpname[50] = {'\0'};
	char *var_copy = NULL;

	if (data->tokens[1] == NULL)
		print_environ(data);
	else
	{
		for (i = 0; data->tokens[1][i]; i++)
		{
			if (data->tokens[1][i] == '=')
			{
				var_copy = str_duplicate(env_get_key(cpname, data));
				if (var_copy != NULL)
					env_set_key(cpname, data->tokens[1] + i + 1, data);
				print_environ(data);
				if (env_get_key(cpname, data) == NULL)
				{
					_print(data->tokens[1]);
					_print("\n");
				}
				else
				{
					env_set_key(cpname, var_copy, data);
					free(var_copy);
				}
				return (0);
			}
			cpname[i] = data->tokens[1][i];
		}
		errno = 2;
		perror(data->command_name);
		errno = 127;
	}
	return (0);
}

/**
 * builtin_set_env - ..
 * @data: struct for the program's data
 * Return: zero if sucess, or other number if its declared in the arguments
 */
int builtin_set_env(data_of_program *data)
{
	if (data->tokens[1] == NULL || data->tokens[2] == NULL)
		return (0);
	if (data->tokens[3] != NULL)
	{
		errno = E2BIG;
		perror(data->command_name);
		return (5);
	}

	env_set_key(data->tokens[1], data->tokens[2], data);

	return (0);
}

/**
 * builtin_unset_env - ..
 * @data: struct for the program's data'
 * Return: ..
 */
int builtin_unset_env(data_of_program *data)
{
	/* validate args */
	if (data->tokens[1] == NULL)
		return (0);
	if (data->tokens[2] != NULL)
	{
		errno = E2BIG;
		perror(data->command_name);
		return (5);
	}
	env_remove_key(data->tokens[1], data);

	return (0);
}

/**
 * builtin_exit - exit of the program with the status
 * @data: struct for the program's data
 * Return: zero if sucess, or other number if its declared in the arguments
 */
int builtin_exit(data_of_program *data)
{
	int i;

	if (data->tokens[1] != NULL)
	{
		for (i = 0; data->tokens[1][i]; i++)
			if ((data->tokens[1][i] < '0' || data->tokens[1][i] > '9')
				&& data->tokens[1][i] != '+')
			{
				errno = 2;
				return (2);
			}
		errno = _atoi(data->tokens[1]);
	}
	free_all_data(data);
	exit(errno);
}
/**
 * builtin_alias - add, remove or show aliases
 * @data: struct for the program's data
 * Return: zero if sucess, or other number if its declared in the arguments
 */
int builtin_alias(data_of_program *data)
{
	int i = 0;

	if (data->tokens[1] == NULL)
		return (print_alias(data, NULL));

	while (data->tokens[++i])
	{
		if (count_characters(data->tokens[i], "="))
			set_alias(data->tokens[i], data);
		else
			print_alias(data, data->tokens[i]);
	}

	return (0);
}