Opens multiple files and prints out their file descriptor value

fdopen_multiple_files.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")
	}

	for _, filePath := range os.Args[1:] {
		// Example of filePath: /home/scriptnull/cool/code.js
		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 of %s is %d \n", filePath, fd)
	}
}