fd.prop

C程序漏洞检查！

void
uno_check(void)
{
        if (fct_call("fopen"))
	{	if (on_track(DEF, 0))
			error("fopen of unclosed fd");
		else
			add_track(DEF, 0);
	}
	if (fct_call("fclose"))
	{	if (match_track(USE, 0))	/* the fd used here was added as def before */
			del_name(USE, 0);	/* now delete it */
		else
			error("closing an unopened fd");
	}

	if (path_ends())
	{	if (any_track(DEF, 0))	/* if anything on track */
			error("fopen without fclose");
	}
}