package shim import ( "context" "fmt" "io" "sync" "syscall" "github.com/crosbymichael/console" runc "github.com/crosbymichael/go-runc" "github.com/tonistiigi/fifo" ) func copyConsole(ctx context.Context, console console.Console, stdin, stdout, stderr string, wg *sync.WaitGroup) error { in, err := fifo.OpenFifo(ctx, stdin, syscall.O_RDONLY, 0) if err != nil { return err } go io.Copy(console, in) outw, err := fifo.OpenFifo(ctx, stdout, syscall.O_WRONLY, 0) if err != nil { return err } outr, err := fifo.OpenFifo(ctx, stdout, syscall.O_RDONLY, 0) if err != nil { return err } wg.Add(1) go func() { io.Copy(outw, console) console.Close() outr.Close() outw.Close() wg.Done() }() return nil } func copyPipes(ctx context.Context, rio runc.IO, stdin, stdout, stderr string, wg *sync.WaitGroup) error { for name, dest := range map[string]func(wc io.WriteCloser, rc io.Closer){ stdout: func(wc io.WriteCloser, rc io.Closer) { wg.Add(1) go func() { io.Copy(wc, rio.Stdout()) wg.Done() wc.Close() rc.Close() }() }, stderr: func(wc io.WriteCloser, rc io.Closer) { wg.Add(1) go func() { io.Copy(wc, rio.Stderr()) wg.Done() wc.Close() rc.Close() }() }, } { fw, err := fifo.OpenFifo(ctx, name, syscall.O_WRONLY, 0) if err != nil { return fmt.Errorf("containerd-shim: opening %s failed: %s", name, err) } fr, err := fifo.OpenFifo(ctx, name, syscall.O_RDONLY, 0) if err != nil { return fmt.Errorf("containerd-shim: opening %s failed: %s", name, err) } dest(fw, fr) } if stdin == "" { return nil } f, err := fifo.OpenFifo(ctx, stdin, syscall.O_RDONLY, 0) if err != nil { return fmt.Errorf("containerd-shim: opening %s failed: %s", stdin, err) } go func() { io.Copy(rio.Stdin(), f) rio.Stdin().Close() f.Close() }() return nil }