Zabbix

/*

** Zabbix

** Copyright (C) 2001-2025 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 "log.h"

#include "sysinfo.h"

​

#define CHECKED_SYSCONF_SYSCALL(sysconf_name)                                   \

    errno = 0;                                              \

    if (-1 == (res##sysconf_name = sysconf(sysconf_name)))                          \

    {                                                   \

        SET_MSG_RESULT(result, zbx_dsprintf(NULL, "Cannot get sysconf(" #sysconf_name "), errno: %s",   \

                zbx_strerror(errno)));                              \

        ret = SYSINFO_RET_FAIL;                                     \

        goto out;                                           \

    }                                                   \

​

#ifdef HAVE_VMINFO_T_UPDATES

#include "stats.h"

#endif

​

static int  VM_MEMORY_TOTAL(AGENT_RESULT *result)

{

    int ret;

    long     res_SC_PHYS_PAGES, res_SC_PAGESIZE;

​

    zabbix_log(LOG_LEVEL_DEBUG, "In %s", __func__);

​

    CHECKED_SYSCONF_SYSCALL(_SC_PHYS_PAGES);

    CHECKED_SYSCONF_SYSCALL(_SC_PAGESIZE);

​

    SET_UI64_RESULT(result, (zbx_uint64_t)res_SC_PHYS_PAGES * res_SC_PAGESIZE);

    ret = SYSINFO_RET_OK;

out:

    zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __func__, zbx_result_string(ret));

    return ret;

}

​

#ifndef HAVE_VMINFO_T_UPDATES

static int  VM_MEMORY_USED(AGENT_RESULT *result)

{

    int     ret;

    zbx_uint64_t    used;

    long        res_SC_PHYS_PAGES, res_SC_AVPHYS_PAGES, res_SC_PAGESIZE;

​

    zabbix_log(LOG_LEVEL_DEBUG, "In %s, (no HAVE_VMINFO_T_UPDATES)", __func__);

​

    CHECKED_SYSCONF_SYSCALL(_SC_PHYS_PAGES);

    CHECKED_SYSCONF_SYSCALL(_SC_AVPHYS_PAGES);

    CHECKED_SYSCONF_SYSCALL(_SC_PAGESIZE);

​

    used = res_SC_PHYS_PAGES - res_SC_AVPHYS_PAGES;

​

    SET_UI64_RESULT(result, used * res_SC_PAGESIZE);

    ret = SYSINFO_RET_OK;

out:

    zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __func__, zbx_result_string(ret));

​

    return ret;

}

​

static int  VM_MEMORY_PUSED(AGENT_RESULT *result)

{

    int     ret;

    zbx_uint64_t    used, total;

    long        res_SC_PHYS_PAGES, res_SC_AVPHYS_PAGES;

​

    zabbix_log(LOG_LEVEL_DEBUG, "In %s, (no HAVE_VMINFO_T_UPDATES)", __func__);

​

    CHECKED_SYSCONF_SYSCALL(_SC_PHYS_PAGES);

    CHECKED_SYSCONF_SYSCALL(_SC_AVPHYS_PAGES);

​

    if (0 == (total = res_SC_PHYS_PAGES))

    {

        SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot calculate percentage because total is zero."));