github.com/containerd/nerdctl/v2@v2.0.0-beta.5.0.20240520001846-b5758f54fa28/pkg/cmd/login/login_unix.go (about)

     1  //go:build unix
     2  
     3  /*
     4     Copyright The containerd Authors.
     5  
     6     Licensed under the Apache License, Version 2.0 (the "License");
     7     you may not use this file except in compliance with the License.
     8     You may obtain a copy of the License at
     9  
    10         http://www.apache.org/licenses/LICENSE-2.0
    11  
    12     Unless required by applicable law or agreed to in writing, software
    13     distributed under the License is distributed on an "AS IS" BASIS,
    14     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    15     See the License for the specific language governing permissions and
    16     limitations under the License.
    17  */
    18  
    19  package login
    20  
    21  import (
    22  	"fmt"
    23  	"os"
    24  	"syscall"
    25  
    26  	"golang.org/x/term"
    27  )
    28  
    29  func readPassword() (string, error) {
    30  	var fd int
    31  	if term.IsTerminal(syscall.Stdin) {
    32  		fd = syscall.Stdin
    33  	} else {
    34  		tty, err := os.Open("/dev/tty")
    35  		if err != nil {
    36  			return "", fmt.Errorf("error allocating terminal: %w", err)
    37  		}
    38  		defer tty.Close()
    39  		fd = int(tty.Fd())
    40  	}
    41  	bytePassword, err := term.ReadPassword(fd)
    42  	if err != nil {
    43  		return "", fmt.Errorf("error reading password: %w", err)
    44  	}
    45  
    46  	return string(bytePassword), nil
    47  }