forked from containerd/containerd
/
io.go
159 lines (137 loc) · 3.14 KB
/
io.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
// +build windows
/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package runhcs
import (
"context"
"io"
"net"
"sync"
"time"
"github.com/Microsoft/go-winio"
"github.com/containerd/containerd/log"
runc "github.com/containerd/go-runc"
"github.com/pkg/errors"
"golang.org/x/sync/errgroup"
)
type pipeSet struct {
stdin net.Conn
stdout net.Conn
stderr net.Conn
}
// newPipeSet connects to the provided pipe addresses
func newPipeSet(ctx context.Context, stdin, stdout, stderr string, terminal bool) (*pipeSet, error) {
var (
err error
set = &pipeSet{}
)
defer func() {
if err != nil {
set.Close()
}
}()
g, _ := errgroup.WithContext(ctx)
dialfn := func(name string, conn *net.Conn) error {
if name == "" {
return nil
}
dialTimeout := 3 * time.Second
c, err := winio.DialPipe(name, &dialTimeout)
if err != nil {
return errors.Wrapf(err, "failed to connect to %s", name)
}
*conn = c
return nil
}
g.Go(func() error {
return dialfn(stdin, &set.stdin)
})
g.Go(func() error {
return dialfn(stdout, &set.stdout)
})
g.Go(func() error {
return dialfn(stderr, &set.stderr)
})
err = g.Wait()
if err != nil {
return nil, err
}
return set, nil
}
// Close terminates all successfully dialed IO connections
func (p *pipeSet) Close() {
for _, cn := range []net.Conn{p.stdin, p.stdout, p.stderr} {
if cn != nil {
cn.Close()
}
}
}
type pipeRelay struct {
ctx context.Context
ps *pipeSet
io runc.IO
wg sync.WaitGroup
once sync.Once
}
func newPipeRelay(ctx context.Context, ps *pipeSet, downstream runc.IO) *pipeRelay {
pr := &pipeRelay{
ctx: ctx,
ps: ps,
io: downstream,
}
if ps.stdin != nil {
go func() {
if _, err := io.Copy(downstream.Stdin(), ps.stdin); err != nil {
if err != winio.ErrFileClosed {
log.G(ctx).WithError(err).Error("error copying stdin to pipe")
}
}
}()
}
if ps.stdout != nil {
pr.wg.Add(1)
go func() {
if _, err := io.Copy(ps.stdout, downstream.Stdout()); err != nil {
log.G(ctx).WithError(err).Error("error copying stdout from pipe")
}
pr.wg.Done()
}()
}
if ps.stderr != nil {
pr.wg.Add(1)
go func() {
if _, err := io.Copy(ps.stderr, downstream.Stderr()); err != nil {
log.G(pr.ctx).WithError(err).Error("error copying stderr from pipe")
}
pr.wg.Done()
}()
}
return pr
}
func (pr *pipeRelay) wait() {
pr.wg.Wait()
}
// closeIO closes stdin to unblock an waiters
func (pr *pipeRelay) closeIO() {
if pr.ps.stdin != nil {
pr.ps.Close()
pr.io.Stdin().Close()
}
}
// close closes all open pipes
func (pr *pipeRelay) close() {
pr.once.Do(func() {
pr.io.Close()
pr.ps.Close()
})
}