/*
** Zabbix
** Copyright (C) 2001-2021 Zabbix SIA
**
** 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
**/

#include "common.h"
#include "sysinfo.h"
#include "log.h"

static long	hertz = 0;

int	SYSTEM_UPTIME(AGENT_REQUEST *request, AGENT_RESULT *result)
{
#if defined(HAVE_LIBPERFSTAT)
	perfstat_cpu_total_t	ps_cpu_total;

	if (0 >= hertz)
	{
		hertz = sysconf(_SC_CLK_TCK);

		if (-1 == hertz)
		{
			SET_MSG_RESULT(result, zbx_dsprintf(NULL, "Cannot obtain clock-tick increment: %s",
					zbx_strerror(errno)));
			return SYSINFO_RET_FAIL;
		}

		if (0 == hertz)	/* make sure we do not divide by 0 */
		{
			SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot calculate uptime because clock-tick increment"
					" is zero."));
			return SYSINFO_RET_FAIL;
		}
	}

	/* AIX 6.1 */
	if (-1 == perfstat_cpu_total(NULL, &ps_cpu_total, sizeof(ps_cpu_total), 1))
	{
		SET_MSG_RESULT(result, zbx_dsprintf(NULL, "Cannot obtain system information: %s", zbx_strerror(errno)));
		return SYSINFO_RET_FAIL;
	}

	SET_UI64_RESULT(result, (zbx_uint64_t)((double)ps_cpu_total.lbolt / hertz));

	return SYSINFO_RET_OK;
#else
	SET_MSG_RESULT(result, zbx_strdup(NULL, "Agent was compiled without support for Perfstat API."));
	return SYSINFO_RET_FAIL;
#endif
}
