// 'docker login': login / register a user to registry service.
func (srv *Server) CmdLogin(stdin io.ReadCloser, stdout rcli.DockerConn, args ...string) error {
// Read a line on raw terminal with support for simple backspace
// sequences and echo.
//
// This function is necessary because the login command must be done in a
// raw terminal for two reasons:
// - we have to read a password (without echoing it);
// - the rcli "protocol" only supports cannonical and raw modes and you
// can't tune it once the command as been started.
var readStringOnRawTerminal = func(stdin io.Reader, stdout io.Writer, echo bool) string {
char := make([]byte, 1)
buffer := make([]byte, 64)
var i = 0
for i < len(buffer) {
n, err := stdin.Read(char)
if n > 0 {
if char[0] == '\r' || char[0] == '\n' {
stdout.Write([]byte{'\r', '\n'})
break
} else if char[0] == 127 || char[0] == '\b' {
if i > 0 {
if echo {
stdout.Write([]byte{'\b', ' ', '\b'})
}
i--
}
} else if !unicode.IsSpace(rune(char[0])) &&
!unicode.IsControl(rune(char[0])) {
if echo {
stdout.Write(char)
}
buffer[i] = char[0]
i++
}
}
if err != nil {
if err != io.EOF {
fmt.Fprintf(stdout, "Read error: %v\r\n", err)
}
break
}
}
return string(buffer[:i])
}
var readAndEchoString = func(stdin io.Reader, stdout io.Writer) string {
return readStringOnRawTerminal(stdin, stdout, true)
}
var readString = func(stdin io.Reader, stdout io.Writer) string {
return readStringOnRawTerminal(stdin, stdout, false)
}
stdout.SetOptionRawTerminal()
cmd := rcli.Subcmd(stdout, "login", "", "Register or Login to the docker registry server")
if err := cmd.Parse(args); err != nil {
return nil
}
var username string
var password string
var email string
fmt.Fprint(stdout, "Username (", srv.runtime.authConfig.Username, "): ")
username = readAndEchoString(stdin, stdout)
if username == "" {
username = srv.runtime.authConfig.Username
}
if username != srv.runtime.authConfig.Username {
fmt.Fprint(stdout, "Password: "******"" {
return fmt.Errorf("Error : Password Required")
}
fmt.Fprint(stdout, "Email (", srv.runtime.authConfig.Email, "): ")
email = readAndEchoString(stdin, stdout)
if email == "" {
email = srv.runtime.authConfig.Email
}
} else {
password = srv.runtime.authConfig.Password
email = srv.runtime.authConfig.Email
}
newAuthConfig := auth.NewAuthConfig(username, password, email, srv.runtime.root)
status, err := auth.Login(newAuthConfig)
if err != nil {
fmt.Fprintf(stdout, "Error: %s\r\n", err)
} else {
srv.runtime.authConfig = newAuthConfig
}
if status != "" {
fmt.Fprint(stdout, status)
}
return nil
}
