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package main
import (
"io"
"os"
"github.com/codegangsta/cli"
"github.com/docker/docker/pkg/term"
"github.com/docker/libcontainer"
)
func newTty(context *cli.Context, p *libcontainer.Process, rootuid int) (*tty, error) {
if context.Bool("tty") {
console, err := p.NewConsole(rootuid)
if err != nil {
return nil, err
}
return &tty{
console: console,
closers: []io.Closer{
console,
},
}, nil
}
return &tty{}, nil
}
type tty struct {
console libcontainer.Console
state *term.State
closers []io.Closer
}
func (t *tty) Close() error {
for _, c := range t.closers {
c.Close()
}
if t.state != nil {
term.RestoreTerminal(os.Stdin.Fd(), t.state)
}
return nil
}
func (t *tty) attach(process *libcontainer.Process) error {
if t.console != nil {
go io.Copy(t.console, os.Stdin)
go io.Copy(os.Stdout, t.console)
state, err := term.SetRawTerminal(os.Stdin.Fd())
if err != nil {
return err
}
t.state = state
process.Stderr = nil
process.Stdout = nil
process.Stdin = nil
} else {
// setup standard pipes so that the TTY of the calling nsinit process
// is not inherited by the container.
r, w, err := os.Pipe()
if err != nil {
return err
}
go io.Copy(w, os.Stdin)
t.closers = append(t.closers, w)
process.Stdin = r
if r, w, err = os.Pipe(); err != nil {
return err
}
go io.Copy(os.Stdout, r)
process.Stdout = w
t.closers = append(t.closers, r)
if r, w, err = os.Pipe(); err != nil {
return err
}
go io.Copy(os.Stderr, r)
process.Stderr = w
t.closers = append(t.closers, r)
}
return nil
}
func (t *tty) setupPipe() {
}
func (t *tty) resize() error {
if t.console == nil {
return nil
}
ws, err := term.GetWinsize(os.Stdin.Fd())
if err != nil {
return err
}
return term.SetWinsize(t.console.Fd(), ws)
}
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