21sh/src/env.c

#include "sh.h"

char	*get_tenv(t_e *e, char *var)
{
	int		i;

	i = -1;
	while (e->env[++i] != NULL)
		if (ft_strcmp(e->env[i], var) == 61)
			return (ft_strchr(e->env[i], '=') + 1);
	return (NULL);
}

void	ft_setenv(t_e *e, char *namevalue)
{
	char	**name;

	name = ft_strsplit(namevalue, '=');
	if (ft_search_pos_char(namevalue, '=') == -1 || \
		namevalue == NULL || isenv(name[0]) == 0)
		error_message("setenv use", "setenv ENV=env", NULL);
	else
	{
		if (get_tenv(e, name[0]) != NULL)
			del_env(e, name[0]);
		add_env(e, namevalue);
	}
	ft_tabdel(name);
}

void	ft_unsetenv(t_e *e, char *name)
{
	if (name == NULL || isenv(name) == 0)
		error_message("unsetenv use", "unsetenv ENV", NULL);
	else if (get_tenv(e, name) != NULL)
		del_env(e, name);
}

int		isenv(char *str)
{
	int		i;

	i = -1;
	while (str[++i] != '\0')
		if (str[i] < 'A' || ('Z' < str[i] && str[i] < '_') ||
				('_' < str[i] && str[i] < 'a') || str[i] > 'z')
			return (0);
	return (1);
}