list-process.go

package main

import (
    "bufio"
    "fmt"
    "os"
    "os/exec"
    "strconv"
    "strings"
)

func main() {
    const (
        PROCFILE  = "/proc/loadavg"
        THRESHOLD = float64(2)
    )

    file, err := os.Open(PROCFILE)
    if err != nil {
        fmt.Printf("error opening %s: %s", PROCFILE, err)
        os.Exit(1)
    }
    defer file.Close()

    var one float64
    scanner := bufio.NewScanner(file)
    for scanner.Scan() {
        line := scanner.Text()

        if scanner.Err() != nil {
            fmt.Printf("erro reading file %s", err)
            os.Exit(1)
        }
        str := strings.Fields(line)[0]
        one, err = strconv.ParseFloat(str, 64)
        if err != nil {
            fmt.Printf("%s", err)
        }
        break
    }

    if one > THRESHOLD {
        cmd := exec.Command("systemd-cat", "ps", "auxfww")
        err := cmd.Start()
        if err != nil {
            fmt.Printf("%s", err)
        }
        cmd.Wait()
    }