text: /*
  ** 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"
  
  #define ZBX_PERFSTAT_PAGE_SHIFT	12	/* 4 KB */
  
  int	SYSTEM_SWAP_SIZE(AGENT_REQUEST *request, AGENT_RESULT *result)
  {
  #ifdef HAVE_LIBPERFSTAT
  	perfstat_memory_total_t	mem;
  	char			*swapdev, *mode;
  
  	if (2 < request->nparam)
  	{
  		SET_MSG_RESULT(result, zbx_strdup(NULL, "Too many parameters."));
  		return SYSINFO_RET_FAIL;
  	}
  
  	swapdev = get_rparam(request, 0);
  	mode = get_rparam(request, 1);
  
  	if (NULL != swapdev && '\0' != *swapdev && 0 != strcmp(swapdev, "all"))
  	{
  		SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid first parameter."));
  		return SYSINFO_RET_FAIL;
  	}
  
  	if (1 != perfstat_memory_total(NULL, &mem, sizeof(perfstat_memory_total_t), 1))
  	{
  		SET_MSG_RESULT(result, zbx_dsprintf(NULL, "Cannot obtain system information: %s", zbx_strerror(errno)));
  		return SYSINFO_RET_FAIL;
  	}
  
  	if (NULL == mode || '\0' == *mode || 0 == strcmp(mode, "free"))
  	{
  		SET_UI64_RESULT(result, mem.pgsp_free << ZBX_PERFSTAT_PAGE_SHIFT);
  	}
  	else if (0 == strcmp(mode, "total"))
  	{
  		SET_UI64_RESULT(result, mem.pgsp_total << ZBX_PERFSTAT_PAGE_SHIFT);
  	}
  	else if (0 == strcmp(mode, "used"))
  	{
  		SET_UI64_RESULT(result, (mem.pgsp_total - mem.pgsp_free) << ZBX_PERFSTAT_PAGE_SHIFT);
  	}
  	else if (0 == strcmp(mode, "pfree"))
  	{
  		SET_DBL_RESULT(result, 0 != mem.pgsp_total ? 100.0 * (mem.pgsp_free / (double)mem.pgsp_total) : 100.0);
  	}
  	else if (0 == strcmp(mode, "pused"))
  	{
  		SET_DBL_RESULT(result, 0 != mem.pgsp_total ? 100.0 - 100.0 * (mem.pgsp_free / (double)mem.pgsp_total) : 0.0);
  	}
  	else
  	{
  		SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid second parameter."));
  		return SYSINFO_RET_FAIL;
  	}
  
  	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
  }
  