1// +build !windows
2
3/*
4   Copyright The containerd Authors.
5
6   Licensed under the Apache License, Version 2.0 (the "License");
7   you may not use this file except in compliance with the License.
8   You may obtain a copy of the License at
9
10       http://www.apache.org/licenses/LICENSE-2.0
11
12   Unless required by applicable law or agreed to in writing, software
13   distributed under the License is distributed on an "AS IS" BASIS,
14   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   See the License for the specific language governing permissions and
16   limitations under the License.
17*/
18
19package v2
20
21import (
22	"context"
23	"io"
24	"net"
25	"path/filepath"
26	"time"
27
28	"github.com/containerd/fifo"
29	"golang.org/x/sys/unix"
30)
31
32func openShimLog(ctx context.Context, bundle *Bundle, _ func(string, time.Duration) (net.Conn, error)) (io.ReadCloser, error) {
33	return fifo.OpenFifo(ctx, filepath.Join(bundle.Path, "log"), unix.O_RDONLY|unix.O_CREAT|unix.O_NONBLOCK, 0700)
34}
35
36func checkCopyShimLogError(ctx context.Context, err error) error {
37	// When using a multi-container shim, the fifo of the 2nd to Nth
38	// container will not be opened when the ctx is done. This will
39	// cause an ErrReadClosed that can be ignored.
40	select {
41	case <-ctx.Done():
42		if err == fifo.ErrReadClosed {
43			return nil
44		}
45	default:
46	}
47	return err
48}
49