github.com/Heebron/moby@v0.0.0-20221111184709-6eab4f55faf7/daemon/logger/plugin_unix.go (about)

     1  //go:build linux || freebsd
     2  // +build linux freebsd
     3  
     4  package logger // import "github.com/docker/docker/daemon/logger"
     5  
     6  import (
     7  	"context"
     8  	"io"
     9  
    10  	"github.com/containerd/fifo"
    11  	"github.com/pkg/errors"
    12  	"golang.org/x/sys/unix"
    13  )
    14  
    15  func openPluginStream(a *pluginAdapter) (io.WriteCloser, error) {
    16  	// Make sure to also open with read (in addition to write) to avoid borken pipe errors on plugin failure.
    17  	// It is up to the plugin to keep track of pipes that it should re-attach to, however.
    18  	// If the plugin doesn't open for reads, then the container will block once the pipe is full.
    19  	f, err := fifo.OpenFifo(context.Background(), a.fifoPath, unix.O_RDWR|unix.O_CREAT|unix.O_NONBLOCK, 0700)
    20  	if err != nil {
    21  		return nil, errors.Wrapf(err, "error creating i/o pipe for log plugin: %s", a.Name())
    22  	}
    23  	return f, nil
    24  }