1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
//go:build linux || darwin || freebsd || netbsd
package password
import (
"errors"
"os"
"os/signal"
"syscall"
terminal "golang.org/x/term"
)
var ErrInterrupt = errors.New("interrupted")
// Read reads a password from the terminal without echo.
func Read(fd int) ([]byte, error) {
// Store and restore the terminal status on interruptions to
// avoid that the terminal remains in the password state
// This is necessary as for https://github.com/golang/go/issues/31180
oldState, err := terminal.GetState(fd)
if err != nil {
return make([]byte, 0), err
}
type Buffer struct {
Buffer []byte
Error error
}
errorChannel := make(chan Buffer, 1)
// SIGINT and SIGTERM restore the terminal, otherwise the no-echo mode would remain intact
interruptChannel := make(chan os.Signal, 1)
signal.Notify(interruptChannel, syscall.SIGINT, syscall.SIGTERM)
defer func() {
signal.Stop(interruptChannel)
close(interruptChannel)
}()
go func() {
for range interruptChannel {
if oldState != nil {
_ = terminal.Restore(fd, oldState)
}
errorChannel <- Buffer{Buffer: make([]byte, 0), Error: ErrInterrupt}
}
}()
go func() {
buf, err := terminal.ReadPassword(fd)
errorChannel <- Buffer{Buffer: buf, Error: err}
}()
buf := <-errorChannel
return buf.Buffer, buf.Error
}
|
