github.com/mirantis/virtlet@v1.5.2-0.20191204181327-1659b8a48e9b/pkg/stream/utils_linux.go (about)

     1  // +build linux
     2  
     3  /*
     4  Copyright 2017 Mirantis
     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 stream
    20  
    21  import (
    22  	"net"
    23  	"syscall"
    24  )
    25  
    26  func getPidFromConnection(conn *net.UnixConn) (int32, error) {
    27  	f, err := conn.File()
    28  	if err != nil {
    29  		return -1, err
    30  	}
    31  	defer f.Close()
    32  	cred, err := syscall.GetsockoptUcred(int(f.Fd()), syscall.SOL_SOCKET, syscall.SO_PEERCRED)
    33  	if err != nil {
    34  		return -1, err
    35  	}
    36  	return cred.Pid, nil
    37  }