Zabbix

//go:build !windows

// +build !windows

​

/*

** 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.

**/

​

package swap

​

import (

    "bufio"

    "errors"

    "fmt"

    "os"

    "strconv"

    "strings"

    "syscall"

​

    "golang.org/x/sys/unix"

    "golang.zabbix.com/sdk/errs"

    "golang.zabbix.com/sdk/plugin"

)

​

const (

    devPath          = "/dev/"

    diskstatLocation = "/proc/diskstats"

    swapLocation     = "/proc/swaps"

    vmstatLocation   = "/proc/vmstat"

)

​

func init() {

    err := plugin.RegisterMetrics(&impl, "Swap",

        "system.swap.size", "Returns Swap space size in bytes or in percentage from total.",

        "system.swap.in", "Swap in (from device into memory) statistics.",

        "system.swap.out", "Swap out (from memory onto device) statistics.",

    )

    if err != nil {

        panic(errs.Wrap(err, "failed to register metrics"))

    }

}

​

func getSwapSize() (uint64, uint64, error) {

    info := &syscall.Sysinfo_t{}

    if err := syscall.Sysinfo(info); err != nil {

        return 0, 0, err

    }

​

    return uint64(info.Totalswap), uint64(info.Freeswap), nil