Initial commit

vendor/github.com/hyperhq/hypercli/daemon/execdriver/windows/namedpipes.go

@@ -0,0 +1,63 @@
+// +build windows
+
+package windows
+
+import (
+	"fmt"
+	"io"
+
+	"github.com/Sirupsen/logrus"
+	"github.com/hyperhq/hypercli/daemon/execdriver"
+)
+
+// General comment. Handling I/O for a container is very different to Linux.
+// We use a named pipe to HCS to copy I/O both in and out of the container,
+// very similar to how docker daemon communicates with a CLI.
+
+// startStdinCopy asynchronously copies an io.Reader to the container's
+// process's stdin pipe and closes the pipe when there is no more data to copy.
+func startStdinCopy(dst io.WriteCloser, src io.Reader) {
+
+	// Anything that comes from the client stdin should be copied
+	// across to the stdin named pipe of the container.
+	go func() {
+		defer dst.Close()
+		bytes, err := io.Copy(dst, src)
+		log := fmt.Sprintf("Copied %d bytes from stdin.", bytes)
+		if err != nil {
+			log = log + " err=" + err.Error()
+		}
+		logrus.Debugf(log)
+	}()
+}
+
+// startStdouterrCopy asynchronously copies data from the container's process's
+// stdout or stderr pipe to an io.Writer and closes the pipe when there is no
+// more data to copy.
+func startStdouterrCopy(dst io.Writer, src io.ReadCloser, name string) {
+	// Anything that comes from the container named pipe stdout/err should be copied
+	// across to the stdout/err of the client
+	go func() {
+		defer src.Close()
+		bytes, err := io.Copy(dst, src)
+		log := fmt.Sprintf("Copied %d bytes from %s.", bytes, name)
+		if err != nil {
+			log = log + " err=" + err.Error()
+		}
+		logrus.Debugf(log)
+	}()
+}
+
+// setupPipes starts the asynchronous copying of data to and from the named
+// pipes used byt he HCS for the std handles.
+func setupPipes(stdin io.WriteCloser, stdout, stderr io.ReadCloser, pipes *execdriver.Pipes) {
+	if stdin != nil {
+		startStdinCopy(stdin, pipes.Stdin)
+	}
+	if stdout != nil {
+		startStdouterrCopy(pipes.Stdout, stdout, "stdout")
+	}
+	if stderr != nil {
+		startStdouterrCopy(pipes.Stderr, stderr, "stderr")
+	}
+}