mirror of https://github.com/docker/cli.git
99 lines
2.1 KiB
Go
99 lines
2.1 KiB
Go
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//go:build !windows
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// +build !windows
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package term
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import (
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"errors"
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"io"
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"os"
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"golang.org/x/sys/unix"
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)
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// ErrInvalidState is returned if the state of the terminal is invalid.
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//
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// Deprecated: ErrInvalidState is no longer used.
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var ErrInvalidState = errors.New("Invalid terminal state")
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// terminalState holds the platform-specific state / console mode for the terminal.
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type terminalState struct {
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termios unix.Termios
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}
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func stdStreams() (stdIn io.ReadCloser, stdOut, stdErr io.Writer) {
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return os.Stdin, os.Stdout, os.Stderr
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}
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func getFdInfo(in interface{}) (uintptr, bool) {
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var inFd uintptr
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var isTerminalIn bool
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if file, ok := in.(*os.File); ok {
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inFd = file.Fd()
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isTerminalIn = isTerminal(inFd)
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}
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return inFd, isTerminalIn
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}
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func getWinsize(fd uintptr) (*Winsize, error) {
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uws, err := unix.IoctlGetWinsize(int(fd), unix.TIOCGWINSZ)
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ws := &Winsize{Height: uws.Row, Width: uws.Col, x: uws.Xpixel, y: uws.Ypixel}
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return ws, err
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}
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func setWinsize(fd uintptr, ws *Winsize) error {
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return unix.IoctlSetWinsize(int(fd), unix.TIOCSWINSZ, &unix.Winsize{
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Row: ws.Height,
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Col: ws.Width,
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Xpixel: ws.x,
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Ypixel: ws.y,
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})
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}
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func isTerminal(fd uintptr) bool {
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_, err := tcget(fd)
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return err == nil
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}
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func restoreTerminal(fd uintptr, state *State) error {
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if state == nil {
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return errors.New("invalid terminal state")
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}
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return tcset(fd, &state.termios)
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}
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func saveState(fd uintptr) (*State, error) {
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termios, err := tcget(fd)
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if err != nil {
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return nil, err
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}
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return &State{termios: *termios}, nil
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}
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func disableEcho(fd uintptr, state *State) error {
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newState := state.termios
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newState.Lflag &^= unix.ECHO
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return tcset(fd, &newState)
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}
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func setRawTerminal(fd uintptr) (*State, error) {
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return makeRaw(fd)
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}
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func setRawTerminalOutput(fd uintptr) (*State, error) {
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return nil, nil
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}
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func tcget(fd uintptr) (*unix.Termios, error) {
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p, err := unix.IoctlGetTermios(int(fd), getTermios)
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if err != nil {
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return nil, err
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}
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return p, nil
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}
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func tcset(fd uintptr, p *unix.Termios) error {
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return unix.IoctlSetTermios(int(fd), setTermios, p)
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}
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