Function ExecutableChecksum

x/init.go:95–116

ExecutableChecksum returns a byte slice containing the SHA256 checksum of the executable. It returns a nil slice if there's an error trying to calculate the checksum.

()

// ExecutableChecksum returns a byte slice containing the SHA256 checksum of the executable.
// It returns a nil slice if there's an error trying to calculate the checksum.
func ExecutableChecksum() []byte {
	execPath, err := os.Executable()
	if err != nil {
		return nil
	}
	execFile, err := os.Open(execPath)
	if err != nil {
		return nil
	}
	defer func() {
		if err := execFile.Close(); err != nil {
			glog.Warningf("error closing file: %v", err)
		}
	}()

	h := sha256.New()
	if _, err := io.Copy(h, execFile); err != nil {
		return nil
	}

	return h.Sum(nil)
}