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 "sysinfo.h"

#include "log.h"

​

/******************************************************************************

 *                                                                            *

 * Function: get_swapinfo                                                     *

 *                                                                            *

 * Purpose: get swap usage statistics                                         *

 *                                                                            *

 * Return value: SUCCEED if swap usage statistics retrieved successfully      *

 *               FAIL otherwise                                               *

 *                                                                            *

 * Comments: we try to imitate "swap -l".                                     *

 *                                                                            *

 ******************************************************************************/

static int  get_swapinfo(zbx_uint64_t *total, zbx_uint64_t *free1, char **error)

{

    int         i, cnt, cnt2, page_size, ret = FAIL;

    struct swaptable    *swt = NULL;

    struct swapent      *ste;

    static char     path[256];

​

    /* get total number of swap entries */

    if (-1 == (cnt = swapctl(SC_GETNSWP, 0)))

    {

        *error = zbx_dsprintf(NULL, "Cannot obtain number of swap entries: %s", zbx_strerror(errno));

        return FAIL;

    }

​

    if (0 == cnt)

    {

        *total = *free1 = 0;

        return SUCCEED;

    }

​

    /* allocate space to hold count + n swapents */

    swt = (struct swaptable *)zbx_malloc(swt, sizeof(struct swaptable) + (cnt - 1) * sizeof(struct swapent));

​

    swt->swt_n = cnt;

​

    /* fill in ste_path pointers: we don't care about the paths, so we point them all to the same buffer */

    ste = &(swt->swt_ent[0]);

    i = cnt;