24aac336f3
This is needed to support daemon restart as the unix socket is recreated at every start. Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
75 lines
1.2 KiB
Go
75 lines
1.2 KiB
Go
// +build !windows
|
|
|
|
package containerd
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"os"
|
|
"strings"
|
|
"syscall"
|
|
"time"
|
|
|
|
"github.com/pkg/errors"
|
|
)
|
|
|
|
func isNoent(err error) bool {
|
|
if err != nil {
|
|
if nerr, ok := err.(*net.OpError); ok {
|
|
if serr, ok := nerr.Err.(*os.SyscallError); ok {
|
|
if serr.Err == syscall.ENOENT {
|
|
return true
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
type dialResult struct {
|
|
c net.Conn
|
|
err error
|
|
}
|
|
|
|
func dialer(address string, timeout time.Duration) (net.Conn, error) {
|
|
var (
|
|
stopC = make(chan struct{})
|
|
synC = make(chan *dialResult)
|
|
)
|
|
address = strings.TrimPrefix(address, "unix://")
|
|
go func() {
|
|
defer close(synC)
|
|
for {
|
|
select {
|
|
case <-stopC:
|
|
return
|
|
default:
|
|
c, err := net.DialTimeout("unix", address, timeout)
|
|
if isNoent(err) {
|
|
<-time.After(10 * time.Millisecond)
|
|
continue
|
|
}
|
|
synC <- &dialResult{c, err}
|
|
return
|
|
}
|
|
}
|
|
}()
|
|
select {
|
|
case dr := <-synC:
|
|
return dr.c, dr.err
|
|
case <-time.After(timeout):
|
|
close(stopC)
|
|
go func() {
|
|
dr := <-synC
|
|
if dr != nil {
|
|
dr.c.Close()
|
|
}
|
|
}()
|
|
return nil, errors.Errorf("dial %s: no such file or directory", address)
|
|
}
|
|
}
|
|
|
|
func dialAddress(address string) string {
|
|
return fmt.Sprintf("unix://%s", address)
|
|
}
|