no such file or directory on forwardIO(stderr)

[hsiangkao]

Try to play nerdbox on Linux host:

nerdctl run --debug --runtime="io.containerd.nerdbox.v1" --snapshotter=erofs -it --rm docker.1ms.run/library/ubuntu:latest /bin/bash

DEBU[0000] verifying process skipped
DEBU[0000] generated log driver: binary:///usr/bin/nerdctl?_NERDCTL_INTERNAL_LOGGING=%2Fvar%2Flib%2Fnerdctl%2F1935db59
DEBU[0000] remote introspection plugin filters           filters="[type==io.containerd.snapshotter.v1, id==erofs]"
FATA[0000] failed to create shim task: containerd-shim: opening file "/run/containerd/fifo/2365072660/6de4ba46f2d7fa683bed82a0ed4cb30071a5c0c1437801d11ffeb57ef15c5647
-stderr" failed: open /run/containerd/fifo/2365072660/6de4ba46f2d7fa683bed82a0ed4cb30071a5c0c1437801d11ffeb57ef15c5647-stderr: no such file or director

It seems the following change can workaround it but I don't look into it:

diff --git a/internal/shim/task/io.go b/internal/shim/task/io.go
index 080c114d9cf5..d9c85fb778d0 100644
--- a/internal/shim/task/io.go
+++ b/internal/shim/task/io.go
@@ -247,7 +247,7 @@ func copyStreams(ctx context.Context, streams [3]io.ReadWriteCloser, stdin, stdo
                                i.dest(sameFile, nil)
                                continue
                        }
-                       if fw, err = os.OpenFile(i.name, syscall.O_WRONLY|syscall.O_APPEND, 0); err != nil {
+                       if fw, err = os.OpenFile(i.name, syscall.O_WRONLY|syscall.O_APPEND|syscall.O_CREAT, 0); err != nil {
                                return fmt.Errorf("containerd-shim: opening file %q failed: %w", i.name, err)
                        }
                        if stdout == stderr {