How to get file length in Go?

If you don't want to open the file, you can directly call os.Stat instead.

fi, err := os.Stat("/path/to/file")
if err != nil {
    return err
}
// get the size
size := fi.Size()

(*os.File).Stat() returns a os.FileInfo value, which in turn has a Size() method. So, given a file f, the code would be akin to

fi, err := f.Stat()
if err != nil {
  // Could not obtain stat, handle error
}

fmt.Printf("The file is %d bytes long", fi.Size())

Tags:

File

Go

Related