forked from containerd/containerd
-
Notifications
You must be signed in to change notification settings - Fork 0
/
io.go
110 lines (100 loc) · 1.8 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
// +build windows
package windows
import (
"context"
"net"
"sync"
"time"
"github.com/Microsoft/go-winio"
"github.com/containerd/containerd/runtime"
"github.com/pkg/errors"
)
type pipeSet struct {
src runtime.IO
stdin net.Conn
stdout net.Conn
stderr net.Conn
}
// NewIO connects to the provided pipe addresses
func newPipeSet(ctx context.Context, io runtime.IO) (*pipeSet, error) {
var (
err error
c net.Conn
wg sync.WaitGroup
set = &pipeSet{src: io}
ch = make(chan error)
opened = 0
)
defer func() {
if err != nil {
go func() {
for i := 0; i < opened; i++ {
// Drain the channel to avoid leaking the goroutines
<-ch
}
close(ch)
wg.Wait()
set.Close()
}()
}
}()
for _, p := range [3]struct {
name string
open bool
conn *net.Conn
}{
{
name: io.Stdin,
open: io.Stdin != "",
conn: &set.stdin,
},
{
name: io.Stdout,
open: io.Stdout != "",
conn: &set.stdout,
},
{
name: io.Stderr,
open: !io.Terminal && io.Stderr != "",
conn: &set.stderr,
},
} {
if p.open {
wg.Add(1)
opened++
go func(name string, conn *net.Conn) {
dialTimeout := 3 * time.Second
c, err = winio.DialPipe(name, &dialTimeout)
if err != nil {
ch <- errors.Wrapf(err, "failed to connect to %s", name)
}
*conn = c
ch <- nil
wg.Done()
}(p.name, p.conn)
}
}
for i := 0; i < opened; i++ {
select {
case <-ctx.Done():
return nil, ctx.Err()
case e := <-ch:
if e != nil {
if err == nil {
err = e
} else {
err = errors.Wrapf(err, e.Error())
}
}
}
}
return set, err
}
// 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()
}
}
}