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 "checks_calculated.h"

​

#include "zbxexpression.h"

#include "zbxeval.h"

#include "zbxtime.h"

#include "zbxvariant.h"

​

int get_value_calculated(zbx_dc_item_t *dc_item, AGENT_RESULT *result)

{

    int         ret = NOTSUPPORTED;

    char            *error = NULL;

    zbx_eval_context_t  ctx;

    zbx_variant_t       value;

    zbx_timespec_t      ts;

    zbx_expression_eval_t   eval;

    zbx_dc_um_handle_t  *um_handle;

​

    zabbix_log(LOG_LEVEL_DEBUG, "In %s() key:'%s' expression:'%s'", __func__, dc_item->key_orig, dc_item->params);

​

    um_handle = zbx_dc_open_user_macros();

​

    if (NULL == dc_item->formula_bin)

    {

        zabbix_log(LOG_LEVEL_DEBUG, "%s() serialized formula is not set", __func__);

        SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot evaluate calculated item:"

                " serialized formula is not set"));

        goto out;

    }

​

    zbx_eval_deserialize(&ctx, dc_item->params, ZBX_EVAL_PARSE_CALC_EXPRESSION, dc_item->formula_bin);

​

    if (SUCCEED != zbx_eval_expand_user_macros(&ctx, &dc_item->host.hostid, 1,

            (zbx_macro_expand_func_t)zbx_dc_expand_user_and_func_macros, um_handle, &error))

    {

        SET_MSG_RESULT(result, zbx_dsprintf(NULL, "Cannot evaluate calculated item: %s", error));

        zbx_free(error);

        zbx_eval_clear(&ctx);

        goto out;

    }

​

    zbx_timespec(&ts);

​

    zbx_expression_eval_init(&eval, ZBX_EXPRESSION_AGGREGATE, &ctx);

    zbx_expression_eval_resolve_item_hosts(&eval, dc_item);

    zbx_expression_eval_resolve_filter_macros(&eval, dc_item);

​

    if (SUCCEED != zbx_expression_eval_execute(&eval, &ts, &value, &error))

    {

        zabbix_log(LOG_LEVEL_DEBUG, "%s() error:%s", __func__, error);