mirror of
https://github.com/cwinfo/matterbridge.git
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104 lines
3.0 KiB
Go
104 lines
3.0 KiB
Go
// Copyright 2011 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 windows
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// Package terminal provides support functions for dealing with terminals, as
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// commonly found on UNIX systems.
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//
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// Putting a terminal into raw mode is the most common requirement:
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//
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// oldState, err := terminal.MakeRaw(0)
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// if err != nil {
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// panic(err)
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// }
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// defer terminal.Restore(0, oldState)
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package terminal
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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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// IsTerminal returns whether the given file descriptor is a terminal.
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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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// MakeRaw put the terminal connected to the given file descriptor into raw
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// mode and returns the previous state of the terminal so that it can be
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// restored.
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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{st}, nil
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}
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// GetState returns the current state of a terminal which may be useful to
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// restore the terminal after a signal.
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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{st}, nil
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}
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// Restore restores the terminal connected to the given file descriptor to a
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// previous state.
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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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// GetSize returns the dimensions of the given terminal.
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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.Size.X), int(info.Size.Y), 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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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)
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st |= (windows.ENABLE_PROCESSED_INPUT | windows.ENABLE_LINE_INPUT | windows.ENABLE_PROCESSED_OUTPUT)
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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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