mirror of https://github.com/docker/cli.git
76 lines
1.9 KiB
Go
76 lines
1.9 KiB
Go
package command
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import (
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"errors"
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"io"
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"os"
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"runtime"
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"github.com/docker/docker/pkg/term"
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)
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// InStream is an input stream used by the DockerCli to read user input
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type InStream struct {
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in io.ReadCloser
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fd uintptr
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isTerminal bool
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state *term.State
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}
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func (i *InStream) Read(p []byte) (int, error) {
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return i.in.Read(p)
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}
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// Close implements the Closer interface
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func (i *InStream) Close() error {
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return i.in.Close()
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}
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// FD returns the file descriptor number for this stream
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func (i *InStream) FD() uintptr {
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return i.fd
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}
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// IsTerminal returns true if this stream is connected to a terminal
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func (i *InStream) IsTerminal() bool {
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return i.isTerminal
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}
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// SetRawTerminal sets raw mode on the input terminal
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func (i *InStream) SetRawTerminal() (err error) {
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if os.Getenv("NORAW") != "" || !i.isTerminal {
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return nil
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}
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i.state, err = term.SetRawTerminal(i.fd)
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return err
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}
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// RestoreTerminal restores normal mode to the terminal
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func (i *InStream) RestoreTerminal() {
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if i.state != nil {
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term.RestoreTerminal(i.fd, i.state)
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}
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}
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// CheckTty checks if we are trying to attach to a container tty
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// from a non-tty client input stream, and if so, returns an error.
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func (i *InStream) CheckTty(attachStdin, ttyMode bool) error {
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// In order to attach to a container tty, input stream for the client must
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// be a tty itself: redirecting or piping the client standard input is
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// incompatible with `docker run -t`, `docker exec -t` or `docker attach`.
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if ttyMode && attachStdin && !i.isTerminal {
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eText := "the input device is not a TTY"
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if runtime.GOOS == "windows" {
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return errors.New(eText + ". If you are using mintty, try prefixing the command with 'winpty'")
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}
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return errors.New(eText)
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}
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return nil
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}
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// NewInStream returns a new OutStream object from a Writer
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func NewInStream(in io.ReadCloser) *InStream {
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fd, isTerminal := term.GetFdInfo(in)
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return &InStream{in: in, fd: fd, isTerminal: isTerminal}
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}
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