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| 1 | +// +build windows |
| 2 | + |
| 3 | +/* |
| 4 | + Copyright The containerd Authors. |
| 5 | +
|
| 6 | + Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | + you may not use this file except in compliance with the License. |
| 8 | + You may obtain a copy of the License at |
| 9 | +
|
| 10 | + http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | +
|
| 12 | + Unless required by applicable law or agreed to in writing, software |
| 13 | + distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | + See the License for the specific language governing permissions and |
| 16 | + limitations under the License. |
| 17 | +*/ |
| 18 | + |
| 19 | +package runhcs |
| 20 | + |
| 21 | +import ( |
| 22 | + "context" |
| 23 | + "io" |
| 24 | + "net" |
| 25 | + "sync" |
| 26 | + "time" |
| 27 | + |
| 28 | + "github.com/Microsoft/go-winio" |
| 29 | + "github.com/containerd/containerd/log" |
| 30 | + runc "github.com/containerd/go-runc" |
| 31 | + "github.com/pkg/errors" |
| 32 | + "golang.org/x/sync/errgroup" |
| 33 | +) |
| 34 | + |
| 35 | +type pipeSet struct { |
| 36 | + stdin net.Conn |
| 37 | + stdout net.Conn |
| 38 | + stderr net.Conn |
| 39 | +} |
| 40 | + |
| 41 | +// newPipeSet connects to the provided pipe addresses |
| 42 | +func newPipeSet(ctx context.Context, stdin, stdout, stderr string, terminal bool) (*pipeSet, error) { |
| 43 | + var ( |
| 44 | + err error |
| 45 | + set = &pipeSet{} |
| 46 | + ) |
| 47 | + |
| 48 | + defer func() { |
| 49 | + if err != nil { |
| 50 | + set.Close() |
| 51 | + } |
| 52 | + }() |
| 53 | + |
| 54 | + g, _ := errgroup.WithContext(ctx) |
| 55 | + |
| 56 | + dialfn := func(name string, conn *net.Conn) error { |
| 57 | + if name == "" { |
| 58 | + return nil |
| 59 | + } |
| 60 | + dialTimeout := 3 * time.Second |
| 61 | + c, err := winio.DialPipe(name, &dialTimeout) |
| 62 | + if err != nil { |
| 63 | + return errors.Wrapf(err, "failed to connect to %s", name) |
| 64 | + } |
| 65 | + *conn = c |
| 66 | + return nil |
| 67 | + } |
| 68 | + |
| 69 | + g.Go(func() error { |
| 70 | + return dialfn(stdin, &set.stdin) |
| 71 | + }) |
| 72 | + g.Go(func() error { |
| 73 | + return dialfn(stdout, &set.stdout) |
| 74 | + }) |
| 75 | + g.Go(func() error { |
| 76 | + return dialfn(stderr, &set.stderr) |
| 77 | + }) |
| 78 | + |
| 79 | + err = g.Wait() |
| 80 | + if err != nil { |
| 81 | + return nil, err |
| 82 | + } |
| 83 | + return set, nil |
| 84 | +} |
| 85 | + |
| 86 | +// Close terminates all successfully dialed IO connections |
| 87 | +func (p *pipeSet) Close() { |
| 88 | + for _, cn := range []net.Conn{p.stdin, p.stdout, p.stderr} { |
| 89 | + if cn != nil { |
| 90 | + cn.Close() |
| 91 | + } |
| 92 | + } |
| 93 | +} |
| 94 | + |
| 95 | +type pipeRelay struct { |
| 96 | + ctx context.Context |
| 97 | + |
| 98 | + ps *pipeSet |
| 99 | + io runc.IO |
| 100 | + |
| 101 | + wg sync.WaitGroup |
| 102 | + once sync.Once |
| 103 | +} |
| 104 | + |
| 105 | +func newPipeRelay(ctx context.Context, ps *pipeSet, downstream runc.IO) *pipeRelay { |
| 106 | + pr := &pipeRelay{ |
| 107 | + ctx: ctx, |
| 108 | + ps: ps, |
| 109 | + io: downstream, |
| 110 | + } |
| 111 | + if ps.stdin != nil { |
| 112 | + go func() { |
| 113 | + if _, err := io.Copy(downstream.Stdin(), ps.stdin); err != nil { |
| 114 | + if err != winio.ErrFileClosed { |
| 115 | + log.G(ctx).WithError(err).Error("error copying stdin to pipe") |
| 116 | + } |
| 117 | + } |
| 118 | + }() |
| 119 | + } |
| 120 | + if ps.stdout != nil { |
| 121 | + pr.wg.Add(1) |
| 122 | + go func() { |
| 123 | + if _, err := io.Copy(ps.stdout, downstream.Stdout()); err != nil { |
| 124 | + log.G(ctx).WithError(err).Error("error copying stdout from pipe") |
| 125 | + } |
| 126 | + pr.wg.Done() |
| 127 | + }() |
| 128 | + } |
| 129 | + if ps.stderr != nil { |
| 130 | + pr.wg.Add(1) |
| 131 | + go func() { |
| 132 | + if _, err := io.Copy(ps.stderr, downstream.Stderr()); err != nil { |
| 133 | + log.G(pr.ctx).WithError(err).Error("error copying stderr from pipe") |
| 134 | + } |
| 135 | + pr.wg.Done() |
| 136 | + }() |
| 137 | + } |
| 138 | + return pr |
| 139 | +} |
| 140 | + |
| 141 | +func (pr *pipeRelay) wait() { |
| 142 | + pr.wg.Wait() |
| 143 | +} |
| 144 | + |
| 145 | +// closeIO closes stdin to unblock an waiters |
| 146 | +func (pr *pipeRelay) closeIO() { |
| 147 | + if pr.ps.stdin != nil { |
| 148 | + pr.ps.Close() |
| 149 | + pr.io.Stdin().Close() |
| 150 | + } |
| 151 | +} |
| 152 | + |
| 153 | +// close closes all open pipes |
| 154 | +func (pr *pipeRelay) close() { |
| 155 | + pr.once.Do(func() { |
| 156 | + pr.io.Close() |
| 157 | + pr.ps.Close() |
| 158 | + }) |
| 159 | +} |
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