122 lines
2.5 KiB
Go
122 lines
2.5 KiB
Go
package main
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import (
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"io"
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"io/ioutil"
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"log"
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"net"
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"os"
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"sync"
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"time"
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"github.com/Microsoft/go-winio"
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clog "github.com/containerd/containerd/log"
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"github.com/pkg/errors"
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"github.com/urfave/cli"
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"google.golang.org/grpc"
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"google.golang.org/grpc/grpclog"
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)
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func getGRPCConnection(context *cli.Context) (*grpc.ClientConn, error) {
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if grpcConn != nil {
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return grpcConn, nil
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}
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bindAddress := context.GlobalString("address")
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// reset the logger for grpc to log to dev/null so that it does not mess with our stdio
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grpclog.SetLogger(log.New(ioutil.Discard, "", log.LstdFlags))
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dialOpts := []grpc.DialOption{grpc.WithInsecure(), grpc.WithTimeout(100 * time.Second)}
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dialOpts = append(dialOpts,
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grpc.WithDialer(func(addr string, timeout time.Duration) (net.Conn, error) {
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return winio.DialPipe(bindAddress, &timeout)
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},
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))
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conn, err := grpc.Dial(bindAddress, dialOpts...)
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if err != nil {
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return nil, errors.Wrapf(err, "failed to dial %q", bindAddress)
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}
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grpcConn = conn
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return grpcConn, nil
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}
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func prepareStdio(stdin, stdout, stderr string, console bool) (*sync.WaitGroup, error) {
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var wg sync.WaitGroup
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if stdin != "" {
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l, err := winio.ListenPipe(stdin, nil)
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if err != nil {
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return nil, errors.Wrapf(err, "failed to create stdin pipe %s", stdin)
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}
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defer func(l net.Listener) {
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if err != nil {
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l.Close()
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}
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}(l)
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go func() {
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c, err := l.Accept()
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if err != nil {
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clog.L.WithError(err).Errorf("failed to accept stdin connection on %s", stdin)
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return
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}
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io.Copy(c, os.Stdin)
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c.Close()
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l.Close()
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}()
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}
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if stdout != "" {
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l, err := winio.ListenPipe(stdout, nil)
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if err != nil {
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return nil, errors.Wrapf(err, "failed to create stdin pipe %s", stdout)
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}
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defer func(l net.Listener) {
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if err != nil {
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l.Close()
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}
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}(l)
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wg.Add(1)
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go func() {
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defer wg.Done()
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c, err := l.Accept()
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if err != nil {
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clog.L.WithError(err).Errorf("failed to accept stdout connection on %s", stdout)
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return
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}
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io.Copy(os.Stdout, c)
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c.Close()
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l.Close()
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}()
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}
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if !console && stderr != "" {
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l, err := winio.ListenPipe(stderr, nil)
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if err != nil {
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return nil, errors.Wrapf(err, "failed to create stderr pipe %s", stderr)
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}
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defer func(l net.Listener) {
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if err != nil {
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l.Close()
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}
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}(l)
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wg.Add(1)
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go func() {
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defer wg.Done()
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c, err := l.Accept()
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if err != nil {
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clog.L.WithError(err).Errorf("failed to accept stderr connection on %s", stderr)
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return
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}
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io.Copy(os.Stderr, c)
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c.Close()
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l.Close()
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}()
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}
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return &wg, nil
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}
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