redirect stderr & stdout to file

buffer1.go

package main

import (
	"fmt"
	"log"
	"os"
	"syscall"
)

func main() {
	filename := "/home/test.log"
	logFile, err := os.OpenFile(filename, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0644)

	if err != nil {
		log.Println("Error in opening ", filename, err)
		os.Exit(2)
	}

	// stdout
	if err = syscall.Dup2(int(logFile.Fd()), 1); err != nil {
		log.Println("Failed to dup", filename)
	}
	// stderr
	if err = syscall.Dup2(int(logFile.Fd()), 2); err != nil {
		log.Println("Failed to dup", filename)
	}
	log.Println("test")
	fmt.Println("test")
}