func ensureGPGHomeDirectory() (string, error) {
real, err := osutil.RealUser()
if err != nil {
return "", err
}
uid, err := strconv.Atoi(real.Uid)
if err != nil {
return "", err
}
gid, err := strconv.Atoi(real.Gid)
if err != nil {
return "", err
}
homedir := os.Getenv("SNAP_GNUPG_HOME")
if homedir == "" {
homedir = filepath.Join(real.HomeDir, ".snap", "gnupg")
}
if err := osutil.MkdirAllChown(homedir, 0700, uid, gid); err != nil {
return "", err
}
return homedir, nil
}
// writeAuthData saves authentication details for later reuse through ReadAuthData
func writeAuthData(user User) error {
real, err := osutil.RealUser()
if err != nil {
return err
}
uid, err := strconv.Atoi(real.Uid)
if err != nil {
return err
}
gid, err := strconv.Atoi(real.Gid)
if err != nil {
return err
}
targetFile := storeAuthDataFilename(real.HomeDir)
if err := osutil.MkdirAllChown(filepath.Dir(targetFile), 0700, uid, gid); err != nil {
return err
}
outStr, err := json.Marshal(user)
if err != nil {
return nil
}
return osutil.AtomicWriteFileChown(targetFile, []byte(outStr), 0600, 0, uid, gid)
}