Files
containerd/cio/io_windows.go
Daniel Nephin 7d4337e738 Reduce the number of IO constructors
Signed-off-by: Daniel Nephin <dnephin@gmail.com>
2017-12-11 15:07:09 -05:00

125 lines
2.6 KiB
Go

package cio
import (
"fmt"
"io"
"net"
"sync"
winio "github.com/Microsoft/go-winio"
"github.com/containerd/containerd/log"
"github.com/pkg/errors"
)
const pipeRoot = `\\.\pipe`
// NewFIFOSetInDir returns a new set of fifos for the task
func NewFIFOSetInDir(_, id string, terminal bool) (*FIFOSet, error) {
return NewFIFOSet(Config{
Terminal: terminal,
Stdin: fmt.Sprintf(`%s\ctr-%s-stdin`, pipeRoot, id),
Stdout: fmt.Sprintf(`%s\ctr-%s-stdout`, pipeRoot, id),
Stderr: fmt.Sprintf(`%s\ctr-%s-stderr`, pipeRoot, id),
}, nil), nil
}
func copyIO(fifos *FIFOSet, ioset *Streams) (*cio, error) {
var (
wg sync.WaitGroup
set []io.Closer
)
if fifos.Stdin != "" {
l, err := winio.ListenPipe(fifos.Stdin, nil)
if err != nil {
return nil, errors.Wrapf(err, "failed to create stdin pipe %s", fifos.Stdin)
}
defer func(l net.Listener) {
if err != nil {
l.Close()
}
}(l)
set = append(set, l)
go func() {
c, err := l.Accept()
if err != nil {
log.L.WithError(err).Errorf("failed to accept stdin connection on %s", fifos.Stdin)
return
}
io.Copy(c, ioset.Stdin)
c.Close()
l.Close()
}()
}
if fifos.Stdout != "" {
l, err := winio.ListenPipe(fifos.Stdout, nil)
if err != nil {
return nil, errors.Wrapf(err, "failed to create stdin pipe %s", fifos.Stdout)
}
defer func(l net.Listener) {
if err != nil {
l.Close()
}
}(l)
set = append(set, l)
wg.Add(1)
go func() {
defer wg.Done()
c, err := l.Accept()
if err != nil {
log.L.WithError(err).Errorf("failed to accept stdout connection on %s", fifos.Stdout)
return
}
io.Copy(ioset.Stdout, c)
c.Close()
l.Close()
}()
}
if !fifos.Terminal && fifos.Stderr != "" {
l, err := winio.ListenPipe(fifos.Stderr, nil)
if err != nil {
return nil, errors.Wrapf(err, "failed to create stderr pipe %s", fifos.Stderr)
}
defer func(l net.Listener) {
if err != nil {
l.Close()
}
}(l)
set = append(set, l)
wg.Add(1)
go func() {
defer wg.Done()
c, err := l.Accept()
if err != nil {
log.L.WithError(err).Errorf("failed to accept stderr connection on %s", fifos.Stderr)
return
}
io.Copy(ioset.Stderr, c)
c.Close()
l.Close()
}()
}
return &cio{config: fifos.Config, closers: set}, nil
}
// NewDirectIO returns an IO implementation that exposes the IO streams as io.ReadCloser
// and io.WriteCloser.
func NewDirectIO(stdin io.WriteCloser, stdout, stderr io.ReadCloser, terminal bool) *DirectIO {
return &DirectIO{
pipes: pipes{
Stdin: stdin,
Stdout: stdout,
Stderr: stderr,
},
cio: cio{
config: Config{Terminal: terminal},
},
}
}