/*****
*
* Copyright (C) 2002 Vincent Glaume <glaume@enseirb.fr>
* All Rights Reserved
*
* This file is part of the Prelude program.
*
* 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, 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; see the file COPYING.  If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*****/

#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/time.h>

#include <libprelude/list.h>
#include <libprelude/prelude-log.h>
#include <libprelude/plugin-common.h>
#include <libprelude/plugin-common-prv.h>

#include "plugin-island.h"


static LIST_HEAD(island_plugins_list);


static int subscribe(plugin_container_t *pc) 
{
        log(LOG_INFO, "- Subscribing %s to active islanding plugins.\n", pc->plugin->name);
        return plugin_add(pc, &island_plugins_list, NULL);
}


static void unsubscribe(plugin_container_t *pc) 
{
        log(LOG_INFO, "- Un-subscribing %s from active islanding plugins.\n", pc->plugin->name);
        plugin_del(pc);
}


int island_plugins_run(cm_island_msg_t *isl_msg)
{
        int ret = 0;
        struct list_head *tmp;
        plugin_container_t *pc;

        list_for_each(tmp, &island_plugins_list) {
                pc = list_entry(tmp, plugin_container_t, ext_list);

                plugin_run_with_return_value(pc, plugin_island_t, run, ret, isl_msg); 
        }
 
        return ret;
}


int island_plugins_init(const char *dirname, int argc, char **argv)
{
        int ret;
	
	ret = access(dirname, F_OK);
	if ( ret < 0 ) {
		if ( errno == ENOENT )
			return 0;
		log(LOG_ERR, "can't access %s.\n", dirname);
		return -1;
	}

        ret = plugin_load_from_dir(dirname, argc, argv, subscribe, unsubscribe);
        if ( ret < 0 && errno != ENOENT ) {
                log(LOG_ERR, "couldn't load plugin subsystem.\n");
                return -1;
        }

        return ret;

}


int island_plugins_available(void)
{
        return list_empty(&island_plugins_list) ? -1 : 0;
}