hotplug.c

Linux2.4.20针对三星公司的s3c2440内核基础上的一些设备驱动代码

/*
 * linux/drivers/usbd/usbd-hotplug.c 
 *
 * Copyright (c) 2000, 2001, 2002 Lineo
 * Copyright (c) 2001 Hewlett Packard
 *
 * By: 
 *      Stuart Lynne <[e-mail]>, 
 *      Tom Rushworth <[e-mail]>, 
 *      Bruce Balden <[e-mail]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */


#include <linux/config.h>
#include <linux/module.h>

#include "usbd-export.h"
#include "usbd-build.h"
#include "usbd-module.h"

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <asm/uaccess.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <net/arp.h>
#include <linux/rtnetlink.h>
#include <linux/smp_lock.h>
#include <linux/ctype.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/pkt_sched.h>
#include <asm/io.h>
#include <linux/proc_fs.h>
#include <linux/kmod.h>



#if defined(CONFIG_PM)
#include <linux/pm.h>
#endif

#ifdef CONFIG_HOTPLUG

int hotplug (char *agent, char *interface, char *action)
{
	char *argv[3], *envp[5], ifname[12 + IFNAMSIZ], action_str[32];

	if (!hotplug_path[0]) {
		printk (KERN_ERR "hotplug: hotplug_path empty\n");
		return -EINVAL;
	}
	//printk(KERN_DEBUG "hotplug: %s\n", hotplug_path);

	if (in_interrupt ()) {
		printk (KERN_ERR "hotplug: in_interrupt\n");
		return -EINVAL;
	}
	sprintf (ifname, "INTERFACE=%s", interface);
	sprintf (action_str, "ACTION=%s", action);

	argv[0] = hotplug_path;
	argv[1] = agent;
	argv[2] = 0;

	envp[0] = "HOME=/";
	envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
	envp[2] = ifname;
	envp[3] = action_str;
	envp[4] = 0;

	return call_usermodehelper (argv[0], argv, envp);
}

#endif				/* CONFIG_HOTPLUG */