on_exit.c

来自「操作系统SunOS 4.1.3版本的源码」· C语言 代码 · 共 37 行

#if !defined(lint) && defined(SCCSIDS)
static	char sccsid[] = "@(#)on_exit.c 1.1 92/07/30 Copyr 1987 Sun Micro";
#endif

#include <sys/types.h>

/*
 * Copyright (c) 1987 by Sun Microsystems, Inc.
 */

char	*malloc();

struct handlers {
	void	(*handler)();
	caddr_t	arg;
	struct	handlers *next;
};

extern	struct handlers *_exit_handlers;

int
on_exit(handler, arg)
	void (*handler)();
	caddr_t arg;
{
	register struct handlers *h =
	    (struct handlers *)malloc(sizeof (*h));
	
	if (h == 0)
		return (-1);
	h->handler = handler;
	h->arg = arg;
	h->next = _exit_handlers;
	_exit_handlers = h;
	return (0);
}