shell_cmds_1.c

#include "main.h"

/**
 * sc_history - Prints the history of this shell
 * @ac: The number of arguments passed
 * @av: The arguments passed
 *
 * Return: The function's exit code
 */
int sc_history(int ac, char *av[])
{
	int i, j, max_width, width;
	int hist_count;
	char **history = get_history(&hist_count);
	char *num = NULL, *buf = NULL;

	buf = long_to_str(hist_count);
	max_width = str_len(buf);
	if (buf != NULL)
		free(buf);
	for (i = 0; i < hist_count; i++)
	{
		num = long_to_str(i);
		width = str_len(num);

		write(STDOUT_FILENO, " ", 1);
		for (j = 0; j < (max_width - width); j++)
			write(STDOUT_FILENO, " ", 1);
		write(STDOUT_FILENO, num, width);
		write(STDOUT_FILENO, " ", 1);
		write(STDOUT_FILENO, *(history + i), str_len(*(history + i)));
		write(STDOUT_FILENO, "\n", 1);
		if (num != NULL)
			free(num);
	}
	(void)ac;
	(void)av;
	return (EC_SUCCESS);
}

/**
 * sc_setenv - Adds or replaces an environment variable in this shell
 * @ac: The number of arguments passed
 * @av: The arguments passed
 *
 * Return: The function's exit code
 */
int sc_setenv(int ac, char *av[])
{
	char *buf0 = NULL, *buf1 = NULL;

	if (ac > 0)
	{
		if (is_variable(av[0]))
		{
			if (ac > 1)
				add_env_var(av[0], av[1]);
			return (EC_SUCCESS);
		}
		else
		{
			buf0 = *((char **)get_shell_prop(EXEC_NAME_ID));
			buf1 = long_to_str(*((int *)get_shell_prop(LINE_NUMBER_ID)));
			write(STDERR_FILENO, buf0, str_len(buf0));
			write(STDERR_FILENO, ": ", 2);
			write(STDERR_FILENO, buf1, str_len(buf1));
			write(STDERR_FILENO, ": setenv: ", 10);
			write(STDERR_FILENO, av[0], str_len(av[0]));
			write(STDERR_FILENO, ": not a variable\n", 17);
			if (buf1 != NULL)
				free(buf1);
			return (EC_INVALID_ARGS);
		}
	}
	else
	{
		buf0 = *((char **)get_shell_prop(EXEC_NAME_ID));
		buf1 = long_to_str(*((int *)get_shell_prop(LINE_NUMBER_ID)));
		write(STDERR_FILENO, buf0, str_len(buf0));
		write(STDERR_FILENO, ": ", 2);
		write(STDERR_FILENO, buf1, str_len(buf1));
		write(STDERR_FILENO, ": setenv: Too few arguments.\n", 29);
		if (buf1 != NULL)
			free(buf1);
		return (EC_INVALID_ARGS);
	}
}

/**
 * sc_unsetenv - Removes an environment variable from this shell
 * @ac: The number of arguments passed
 * @av: The arguments passed
 *
 * Return: The function's exit code
 */
int sc_unsetenv(int ac, char *av[])
{
	char *buf0 = NULL, *buf1 = NULL;

	if (ac > 0)
	{
		if (get_env_var(av[0]) != NULL)
		{
			remove_env_var(av[0]);
			return (EC_SUCCESS);
		}
		else
		{
			buf0 = *((char **)get_shell_prop(EXEC_NAME_ID));
			buf1 = long_to_str(*((int *)get_shell_prop(LINE_NUMBER_ID)));
			write(STDERR_FILENO, buf0, str_len(buf0));
			write(STDERR_FILENO, ": ", 2);
			write(STDERR_FILENO, buf1, str_len(buf1));
			write(STDERR_FILENO, ": unsetenv: ", 12);
			write(STDERR_FILENO, av[0], str_len(av[0]));
			write(STDERR_FILENO, ": not found\n", 12);
			if (buf1 != NULL)
				free(buf1);
			return (EC_GENERAL_ERROR);
		}
	}
	else
	{
		buf0 = *((char **)get_shell_prop(EXEC_NAME_ID));
		buf1 = long_to_str(*((int *)get_shell_prop(LINE_NUMBER_ID)));
		write(STDERR_FILENO, buf0, str_len(buf0));
		write(STDERR_FILENO, ": ", 2);
		write(STDERR_FILENO, buf1, str_len(buf1));
		write(STDERR_FILENO, ": unsetenv: Too few arguments.\n", 31);
		if (buf1 != NULL)
			free(buf1);
		return (EC_INVALID_ARGS);
	}
}