Split files

sample_splitting.go

package main

import (
    "flag"
    "fmt"
    "io/ioutil"
)

const (
    SPLIT_NFILES = 4
)

func main() {
    var filename, newfile string
    var readBytes, splitBytes []byte
    var err error

    flag.StringVar(&filename, "file", "testfile", "[FILENAME]")
    flag.Parse()

    readBytes, err = ioutil.ReadFile(filename)
    if err != nil {
        return
    }

    splitn := len(readBytes) / SPLIT_NFILES

    splitBytes = readBytes[:splitn]
    newfile = filename + "1"
    if splitBytes != nil {
        ioutil.WriteFile(newfile, splitBytes, 0777)
        fmt.Println("Written +", splitn)
    }
}