Opens a file and prints the file descriptor

fdopen.go

package main

import (
	"fmt"
	"log"
	"os"

	"golang.org/x/sys/unix"
)

func main() {
	if len(os.Args) < 2 {
		log.Fatalln("Requires atleast one argument")
	}

	// Example of filePath: /home/scriptnull/cool/code.js
	filePath := os.Args[1]
	if filePath == "" {
		log.Fatalln("Requires a non-empty file path")
	}

	// Open the filePath
	fd, err := unix.Open(filePath, unix.O_RDWR|unix.O_CREAT, 0755)
	if err != nil {
		log.Fatalf("Error: %+v fd: %d \n", err, fd)
	}

	// Print the file Descriptor
	fmt.Printf("File descriptor value is %d \n", fd)
}