mirror of
https://github.com/foxcpp/maddy.git
synced 2025-04-03 05:07:38 +03:00
119 lines
2.7 KiB
Go
119 lines
2.7 KiB
Go
/*
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Maddy Mail Server - Composable all-in-one email server.
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Copyright © 2019-2020 Max Mazurov <fox.cpp@disroot.org>, Maddy Mail Server contributors
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package clitools
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import (
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"bufio"
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"errors"
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"fmt"
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"os"
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)
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var stdinScanner = bufio.NewScanner(os.Stdin)
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func Confirmation(prompt string, def bool) bool {
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selection := "y/N"
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if def {
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selection = "Y/n"
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}
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fmt.Fprintf(os.Stderr, "%s [%s]: ", prompt, selection)
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if !stdinScanner.Scan() {
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fmt.Fprintln(os.Stderr, stdinScanner.Err())
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return false
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}
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switch stdinScanner.Text() {
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case "Y", "y":
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return true
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case "N", "n":
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return false
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default:
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return def
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}
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}
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func readPass(tty *os.File, output []byte) ([]byte, error) {
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cursor := output[0:1]
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readen := 0
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for {
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n, err := tty.Read(cursor)
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if n != 1 {
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return nil, errors.New("ReadPassword: invalid read size when not in canonical mode")
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}
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if err != nil {
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return nil, errors.New("ReadPassword: " + err.Error())
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}
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if cursor[0] == '\n' {
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break
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}
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// Esc or Ctrl+D or Ctrl+C.
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if cursor[0] == '\x1b' || cursor[0] == '\x04' || cursor[0] == '\x03' {
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return nil, errors.New("ReadPassword: prompt rejected")
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}
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if cursor[0] == '\x7F' /* DEL */ {
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if readen != 0 {
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readen--
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cursor = output[readen : readen+1]
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}
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continue
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}
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if readen == cap(output) {
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return nil, errors.New("ReadPassword: too long password")
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}
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readen++
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cursor = output[readen : readen+1]
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}
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return output[0:readen], nil
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}
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func ReadPassword(prompt string) (string, error) {
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termios, err := TurnOnRawIO(os.Stdin)
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hiddenPass := true
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if err != nil {
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hiddenPass = false
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fmt.Fprintln(os.Stderr, "Failed to disable terminal output:", err)
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}
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// There is no meaningful way to handle error here.
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//nolint:errcheck
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defer TcSetAttr(os.Stdin.Fd(), &termios)
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fmt.Fprintf(os.Stderr, "%s: ", prompt)
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if hiddenPass {
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buf := make([]byte, 512)
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buf, err = readPass(os.Stdin, buf)
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if err != nil {
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return "", err
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}
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fmt.Println()
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return string(buf), nil
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} else {
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if !stdinScanner.Scan() {
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return "", stdinScanner.Err()
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}
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return stdinScanner.Text(), nil
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}
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}
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