github.com/demonoid81/containerd@v1.3.4/runtime/v2/shim_unix.go (about)

     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  
    19  package v2
    20  
    21  import (
    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  
    32  func 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  
    36  func 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  }