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/>.

**/

​

package main

​

import (

    "fmt"

    "strings"

    "time"

​

    "golang.zabbix.com/agent2/internal/agent"

    "golang.zabbix.com/agent2/internal/agent/scheduler"

    "golang.zabbix.com/agent2/pkg/zbxcmd"

    "golang.zabbix.com/sdk/log"

)

​

func updateHostname(taskManager scheduler.Scheduler, options *agent.AgentOptions) error {

    var maxLen int

    var err error

​

    if len(options.Hostname) == 0 {

        var hostnameItem string

        var taskResult *string

​

        if len(options.HostnameItem) == 0 {

            hostnameItem = "system.hostname"

        } else {

            hostnameItem = options.HostnameItem

        }

​

        taskResult, err = taskManager.PerformTask(hostnameItem, time.Second*time.Duration(options.Timeout), agent.LocalChecksClientID)

        if err != nil {

            if len(options.HostnameItem) == 0 {

                return fmt.Errorf("cannot get system hostname using \"%s\" item as default for \"HostnameItem\" configuration parameter: %s", hostnameItem, err.Error())

            }

​

            return fmt.Errorf("cannot get system hostname using \"%s\" item specified by \"HostnameItem\" configuration parameter: %s", hostnameItem, err.Error())

        }

​

        if taskResult == nil || len(*taskResult) == 0 {

            return fmt.Errorf("cannot get system hostname using \"%s\" item specified by \"HostnameItem\" configuration parameter: value is empty", hostnameItem)

        }

​

        options.Hostname = *taskResult

        hosts := agent.ExtractHostnames(options.Hostname)

        options.Hostname = strings.Join(hosts, ",")

        if len(hosts) > 1 {

            maxLen = zbxcmd.MaxExecuteOutputLenB

        } else {

            maxLen = agent.HostNameLen

        }

        if len(options.Hostname) > maxLen {