package main

import "os/exec"
import "github.com/golang/glog"
import "fmt"
import "strings"
import "errors"

func thisWorks() {
    str_out := "hello world n How are you nthis is good"
    lines := strings.Split(str_out, "n")
    fmt.Printf("lines is  n%sn", lines)
}

func GetFreeOutput() error {

    var errMsg string
    bytes_out, err := exec.Command("free").Output()

    // This shows that the output has 10 (newline) in it.
    fmt.Println(bytes_out)

    if err != nil {
        errMsg = "Error geting output of free command"
        glog.Fatal(errMsg)
        return errors.New(errMsg)
    }

    str_out := string(bytes_out)
    fmt.Printf("str_out is  n%s", str_out)

    // This is not splitting the lines, it is converting the whole output to a single line.
    fmt.Println("nLines are ", strings.Split(str_out, "n"))

    index_of_newline := strings.Index(str_out, "n")

    // This gives the index of "n" as 79 on my machine, which is correct.
    fmt.Printf("nIndex is %d", index_of_newline)

    fmt.Println("nLine using index are ", strings.Split(str_out, string(str_out[index_of_newline])))

    return nil
}

func main() {
    err := GetFreeOutput()
    fmt.Printf("Error is %s", err)
}