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