github.com/containerd/containerd@v22.0.0-20200918172823-438c87b8e050+incompatible/pkg/dialer/dialer_unix.go (about)

     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 dialer
    20  
    21  import (
    22  	"fmt"
    23  	"net"
    24  	"os"
    25  	"strings"
    26  	"syscall"
    27  	"time"
    28  )
    29  
    30  // DialAddress returns the address with unix:// prepended to the
    31  // provided address
    32  func DialAddress(address string) string {
    33  	return fmt.Sprintf("unix://%s", address)
    34  }
    35  
    36  func isNoent(err error) bool {
    37  	if err != nil {
    38  		if nerr, ok := err.(*net.OpError); ok {
    39  			if serr, ok := nerr.Err.(*os.SyscallError); ok {
    40  				if serr.Err == syscall.ENOENT {
    41  					return true
    42  				}
    43  			}
    44  		}
    45  	}
    46  	return false
    47  }
    48  
    49  func dialer(address string, timeout time.Duration) (net.Conn, error) {
    50  	address = strings.TrimPrefix(address, "unix://")
    51  	return net.DialTimeout("unix", address, timeout)
    52  }