74 lines
1.7 KiB
Go
74 lines
1.7 KiB
Go
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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build solaris
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package terminal // import "golang.org/x/crypto/ssh/terminal"
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import (
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"golang.org/x/sys/unix"
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"io"
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"syscall"
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)
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// State contains the state of a terminal.
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type State struct {
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termios syscall.Termios
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}
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// IsTerminal returns true if the given file descriptor is a terminal.
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func IsTerminal(fd int) bool {
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// see: http://src.illumos.org/source/xref/illumos-gate/usr/src/lib/libbc/libc/gen/common/isatty.c
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var termio unix.Termio
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err := unix.IoctlSetTermio(fd, unix.TCGETA, &termio)
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return err == nil
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}
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// ReadPassword reads a line of input from a terminal without local echo. This
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// is commonly used for inputting passwords and other sensitive data. The slice
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// returned does not include the \n.
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func ReadPassword(fd int) ([]byte, error) {
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// see also: http://src.illumos.org/source/xref/illumos-gate/usr/src/lib/libast/common/uwin/getpass.c
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val, err := unix.IoctlGetTermios(fd, unix.TCGETS)
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if err != nil {
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return nil, err
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}
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oldState := *val
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newState := oldState
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newState.Lflag &^= syscall.ECHO
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newState.Lflag |= syscall.ICANON | syscall.ISIG
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newState.Iflag |= syscall.ICRNL
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err = unix.IoctlSetTermios(fd, unix.TCSETS, &newState)
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if err != nil {
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return nil, err
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}
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defer unix.IoctlSetTermios(fd, unix.TCSETS, &oldState)
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var buf [16]byte
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var ret []byte
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for {
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n, err := syscall.Read(fd, buf[:])
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if err != nil {
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return nil, err
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}
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if n == 0 {
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if len(ret) == 0 {
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return nil, io.EOF
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}
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break
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}
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if buf[n-1] == '\n' {
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n--
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}
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ret = append(ret, buf[:n]...)
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if n < len(buf) {
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break
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}
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}
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return ret, nil
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}
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