package ws

import (
	"fmt"
	"os"
)

func checkFile(fileNa string) error {
	var (
		err  error
		stat os.FileInfo
	)

	if stat, err = os.Stat(fileNa); err != nil {
		return fmt.Errorf("unable to check metadata for file '%s': %v", fileNa, err)
	}
	if !stat.Mode().IsRegular() {
		return fmt.Errorf("file '%s' is not regular")
	}
	if stat.Mode()&0444 == 0 {
		return fmt.Errorf("file '%s' is not readable")
	}
	return nil
}