test write full error

link.md

Where ErrShortWrite will appear in io.Copy

About no space left on device

result.txt

$ go build testwritefull.go
$ sudo ./testwritefull 
write err write /run/tmpfile: no space left on device

testwritefull.go

package main

import (
	"fmt"
	"os"
	"io"
)

func main() {
	r, err := os.Open("/dev/zero")
	f, err := os.Create("/run/tmpfile")
	if err != nil {
		fmt.Println("err", err)
		return
	}

	for {
		if _, err := io.Copy(f, r); err != nil {
			fmt.Println("write err", err)
			return
		}
	}
}