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"

​

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

 *                                                                            *

 * Purpose: gets 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;

    while (--i >= 0)

    {

        ste++->ste_path = path;

    }

​

    /* grab all swap info */

    if (-1 == (cnt2 = swapctl(SC_LIST, swt)))

    {