void sh_builtin_unsetenv(char **av, char ***env)
{
int i;
int n;
i = 0;
n = 0;
if (!av || !env)
return ;
if (ft_arrlen(av) != 2)
{
sh_unsetenv_usage();
return ;
}
while ((*env)[i])
{
if (sh_get_env_pos(av[1], *env) >= 0)
n++;
i++;
}
if (n != 0)
sh_builtin_delete(0, av, env);
else
ft_putendl_fd("unsetenv: wrong arg", 2);
}
static void sh_builtin_delete(int n, char **av, char ***env)
{
char **new_env;
int i;
i = 0;
if ((new_env = (char**)malloc(sizeof(char*) * ft_arrlen(*env))) == NULL)
return ;
if (((n = sh_get_env_pos(av[1], *env)) >= 0) && (*env)[n])
{
while ((*env)[i] && i < n)
new_env[i] = (*env)[i], i++;
free((*env)[i]);
while ((*env)[i] && ((*env)[i] = (*env)[i + 1]))
{
new_env[i] = (*env)[i];
i++;
}
new_env[i] = NULL;
free(*env);
*env = new_env;
}
}
size_t ft_arrlen(char **array)
{
return (*array ? 1 + ft_arrlen(array + 1) : 0);
}
