File modes in golang

main.go

package main

import (
	"fmt"
	"os"
)

type NamedFileMode struct {
	name string
	fm   os.FileMode
}

func main() {

	fileModes := []NamedFileMode{
		{"ModeDir        // d: is a directory", os.ModeDir},
		{"ModeAppend     // a: append-only", os.ModeAppend},
		{"ModeExclusive  // l: exclusive use", os.ModeExclusive},
		{"ModeTemporary  // T: temporary file; Plan 9 only", os.ModeTemporary},
		{"ModeSymlink    // L: symbolic link", os.ModeSymlink},
		{"ModeDevice     // D: device file", os.ModeDevice},
		{"ModeNamedPipe  // p: named pipe (FIFO)", os.ModeNamedPipe},
		{"ModeSocket     // S: Unix domain socket", os.ModeSocket},
		{"ModeSetuid     // u: setuid", os.ModeSetuid},
		{"ModeSetgid     // g: setgid", os.ModeSetgid},
		{"ModeCharDevice // c: Unix character device, when ModeDevice is set", os.ModeCharDevice},
		{"ModeSticky     // t: sticky", os.ModeSticky},
	}

	info, err := os.Stdin.Stat()
	if err != nil {
		panic(err)
	}

	fmt.Printf("%02d %032b %s\n", 0, info.Mode(), "ModeInput")
	fmt.Println()
	
	for pos, nfm := range fileModes {
		fmt.Printf("%02d %032b %s\n", pos+1, nfm.fm, nfm.name)
	}

	fmt.Println()
	for pos, nfm := range fileModes {
		if info.Mode()&nfm.fm == nfm.fm {
			fmt.Printf("%02d %s\n", pos+1, nfm.name)
		}
	}

	fmt.Println()
	fmt.Println("Args")
		
	for pos, arg := range os.Args {
		fmt.Printf("%02d %s\n", pos, arg)
	}
	fmt.Println()
}