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"

#include "../common/zbxsysinfo_common.h"

#include "zbx_sysinfo_kstat.h"

​

#include "zbxjson.h"

#include "zbxnum.h"

​

static int  get_kstat_named_field(const char *name, const char *field, zbx_uint64_t *field_value, char **error)

{

    int     ret = FAIL, min_instance = -1;

    kstat_ctl_t *kc;

    kstat_t     *kp, *min_kp;

    kstat_named_t   *kn;

​

    if (NULL == (kc = kstat_open()))

    {

        *error = zbx_dsprintf(NULL, "Cannot open kernel statistics facility: %s", zbx_strerror(errno));

        return FAIL;

    }

​

    for (kp = kc->kc_chain; NULL != kp; kp = kp->ks_next)   /* traverse all kstat chain */

    {

        if (0 != strcmp(name, kp->ks_name))     /* network interface name */

            continue;

​

        if (0 != strcmp("net", kp->ks_class))

            continue;

​

        /* find instance with the smallest number */

​

        if (-1 == min_instance || kp->ks_instance < min_instance)

        {

            min_instance = kp->ks_instance;

            min_kp = kp;

        }

​

        if (0 == min_instance)

            break;

    }

​

    if (-1 != min_instance)

        kp = min_kp;

​

    if (NULL == kp)

    {

        *error = zbx_dsprintf(NULL, "Cannot look up interface \"%s\" in kernel statistics facility", name);

        goto clean;

    }