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