/**
 * collectd - src/uptime.c
 * Copyright (C) 2007  Florian octo Forster
 *
 * 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; only version 2 of the License is applicable.
 *
 * 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.,
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 *
 * Authors:
 *   Florian octo Forster <octo at verplant.org>
 **/

#include "collectd.h"
#include "common.h"
#include "plugin.h"

#if !KERNEL_LINUX
# error "No applicable input method."
#endif

#define UPTIME_FILE "/proc/uptime"

static void uptime_submit (double uptime)
{
	value_t values[1];
	value_list_t vl = VALUE_LIST_INIT;

	values[0].gauge = uptime;

	vl.values = values;
	vl.values_len = 1;
	vl.time = time (NULL);
	strcpy (vl.host, hostname_g);
	strcpy (vl.plugin, "uptime");
	strcpy (vl.plugin_instance, "");
	strcpy (vl.type_instance, "");

	plugin_dispatch_values ("uptime", &vl);
}

static int uptime_read (void)
{
	double uptime;
	FILE *fh;

	fh = fopen (UPTIME_FILE, "r");
	if (fh == NULL)
		return (-1);

	if (fscanf (fh, "%lf", &uptime) < 1)	
	{
		fclose (fh);
		return (-1);
	}
	fclose (fh);

	uptime_submit (uptime);

	return (0);
}

void module_register (void)
{
	plugin_register_read ("uptime", uptime_read);
} /* void module_register */