Windows: Updates Windows Vendoring

Updates windows dependent libraries for vendoing.

vendor/github.com/Microsoft/hcsshim/cmd/runhcs/utils.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"fmt"
+	"net"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/Microsoft/hcsshim/internal/appargs"
+	"github.com/Microsoft/hcsshim/internal/runhcs"
+)
+
+var argID = appargs.NonEmptyString
+
+func absPathOrEmpty(path string) (string, error) {
+	if path == "" {
+		return "", nil
+	}
+	if strings.HasPrefix(path, runhcs.SafePipePrefix) {
+		if len(path) > len(runhcs.SafePipePrefix) {
+			return runhcs.SafePipePath(path[len(runhcs.SafePipePrefix):]), nil
+		}
+	}
+	return filepath.Abs(path)
+}
+
+// createPidFile creates a file with the processes pid inside it atomically
+// it creates a temp file with the paths filename + '.' infront of it
+// then renames the file
+func createPidFile(path string, pid int) error {
+	var (
+		tmpDir  = filepath.Dir(path)
+		tmpName = filepath.Join(tmpDir, fmt.Sprintf(".%s", filepath.Base(path)))
+	)
+	f, err := os.OpenFile(tmpName, os.O_RDWR|os.O_CREATE|os.O_EXCL|os.O_SYNC, 0666)
+	if err != nil {
+		return err
+	}
+	_, err = fmt.Fprintf(f, "%d", pid)
+	f.Close()
+	if err != nil {
+		return err
+	}
+	return os.Rename(tmpName, path)
+}
+
+func closeWritePipe(pipe net.Conn) error {
+	return pipe.(interface {
+		CloseWrite() error
+	}).CloseWrite()
+}