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 Affero General Public License as published by the Free Software Foundation, version 3.

**

** 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 Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

#include "zbxsysinfo.h"

#include "../sysinfo.h"

​

static int  get_swap_size(zbx_uint64_t *total, zbx_uint64_t *free, zbx_uint64_t *used, double *pfree, double *pused,

        char **error)

{

    int     mib[2];

    size_t      len;

    struct uvmexp   v;

​

    mib[0] = CTL_VM;

    mib[1] = VM_UVMEXP;

​

    len = sizeof(v);

​

    if (0 != sysctl(mib, 2, &v, &len, NULL, 0))

    {

        *error = zbx_dsprintf(NULL, "Cannot obtain system information: %s", zbx_strerror(errno));

        return SYSINFO_RET_FAIL;

    }

​

    /* int pagesize;    size of a page (PAGE_SIZE): must be power of 2 */

    /* int swpages;     number of PAGE_SIZE'ed swap pages */

    /* int swpginuse;   number of swap pages in use */

​

    if (NULL != total)

        *total = (zbx_uint64_t)v.swpages * v.pagesize;

    if (NULL != free)

        *free = (zbx_uint64_t)(v.swpages - v.swpginuse) * v.pagesize;

    if (NULL != used)

        *used = (zbx_uint64_t)v.swpginuse * v.pagesize;

    if (NULL != pfree)

        *pfree = 0 != v.swpages ? (double)(100.0 * (v.swpages - v.swpginuse)) / v.swpages : 100;

    if (NULL != pused)

        *pused = 0 != v.swpages ? (double)(100.0 * v.swpginuse) / v.swpages : 0;

​

    return SYSINFO_RET_OK;

}

​

static int  system_swap_total(AGENT_RESULT *result)

{

    zbx_uint64_t    value;

    char        *error;

​

    if (SYSINFO_RET_OK != get_swap_size(&value, NULL, NULL, NULL, NULL, &error))

    {

        SET_MSG_RESULT(result, error);

        return SYSINFO_RET_FAIL;

    }