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80 lines
2.1 KiB
Go
80 lines
2.1 KiB
Go
// Copyright 2019 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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package term
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import (
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"os"
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"golang.org/x/sys/windows"
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)
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type state struct {
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mode uint32
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}
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func isTerminal(fd int) bool {
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var st uint32
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err := windows.GetConsoleMode(windows.Handle(fd), &st)
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return err == nil
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}
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func makeRaw(fd int) (*State, error) {
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var st uint32
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if err := windows.GetConsoleMode(windows.Handle(fd), &st); err != nil {
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return nil, err
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}
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raw := st &^ (windows.ENABLE_ECHO_INPUT | windows.ENABLE_PROCESSED_INPUT | windows.ENABLE_LINE_INPUT | windows.ENABLE_PROCESSED_OUTPUT)
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if err := windows.SetConsoleMode(windows.Handle(fd), raw); err != nil {
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return nil, err
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}
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return &State{state{st}}, nil
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}
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func getState(fd int) (*State, error) {
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var st uint32
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if err := windows.GetConsoleMode(windows.Handle(fd), &st); err != nil {
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return nil, err
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}
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return &State{state{st}}, nil
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}
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func restore(fd int, state *State) error {
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return windows.SetConsoleMode(windows.Handle(fd), state.mode)
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}
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func getSize(fd int) (width, height int, err error) {
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var info windows.ConsoleScreenBufferInfo
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if err := windows.GetConsoleScreenBufferInfo(windows.Handle(fd), &info); err != nil {
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return 0, 0, err
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}
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return int(info.Window.Right - info.Window.Left + 1), int(info.Window.Bottom - info.Window.Top + 1), nil
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}
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func readPassword(fd int) ([]byte, error) {
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var st uint32
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if err := windows.GetConsoleMode(windows.Handle(fd), &st); err != nil {
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return nil, err
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}
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old := st
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st &^= (windows.ENABLE_ECHO_INPUT | windows.ENABLE_LINE_INPUT)
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st |= (windows.ENABLE_PROCESSED_OUTPUT | windows.ENABLE_PROCESSED_INPUT)
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if err := windows.SetConsoleMode(windows.Handle(fd), st); err != nil {
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return nil, err
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}
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defer windows.SetConsoleMode(windows.Handle(fd), old)
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var h windows.Handle
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p, _ := windows.GetCurrentProcess()
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if err := windows.DuplicateHandle(p, windows.Handle(fd), p, &h, 0, false, windows.DUPLICATE_SAME_ACCESS); err != nil {
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return nil, err
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}
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f := os.NewFile(uintptr(h), "stdin")
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defer f.Close()
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return readPasswordLine(f)
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}
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