func GetDBSize(dbname string) (size string, err error) {
info, err := os.Stat(DataDir + "/" + dbname)
if err != nil {
return "", err
}
if !info.IsDir() {
return "", ErrInvalidDir
}
cmd := exec.Command("du", DataDir+"/"+dbname, "-s", "-k")
output, err := cmd.CombinedOutput()
if err != nil {
return "", errors.Append(err, errors.New(string(output)))
}
size = strings.TrimSpace(strings.Split(string(output), "\t")[0])
return size, nil
}
func main() {
err1 := errors.Wrap(Err1, Err2)
err2 := errors.Append(Err2, Err1)
fmt.Printf("%T: %v\n", err1, err1)
fmt.Printf("%T: %v\n", err2, err2)
}