/usr/share/gocode/src/github.com/coreos/go-systemd/examples/activation/udpconn.go is in golang-github-coreos-go-systemd-dev 3-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | // Copyright 2015 CoreOS, Inc.
//
// 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.
// Activation example used by the activation unit tests.
package main
import (
"fmt"
"net"
"os"
"github.com/coreos/go-systemd/activation"
)
func fixListenPid() {
if os.Getenv("FIX_LISTEN_PID") != "" {
// HACK: real systemd would set LISTEN_PID before exec'ing but
// this is too difficult in golang for the purpose of a test.
// Do not do this in real code.
os.Setenv("LISTEN_PID", fmt.Sprintf("%d", os.Getpid()))
}
}
func main() {
fixListenPid()
pc, _ := activation.PacketConns(false)
if len(pc) == 0 {
panic("No packetConns")
}
if os.Getenv("LISTEN_PID") == "" || os.Getenv("LISTEN_FDS") == "" {
panic("Should not unset envs")
}
pc, err := activation.PacketConns(true)
if err != nil {
panic(err)
}
if os.Getenv("LISTEN_PID") != "" || os.Getenv("LISTEN_FDS") != "" {
panic("Can not unset envs")
}
udp1, ok := pc[0].(*net.UDPConn)
if !ok {
panic("packetConn 1 not UDP")
}
udp2, ok := pc[1].(*net.UDPConn)
if !ok {
panic("packetConn 2 not UDP")
}
_, addr1, err := udp1.ReadFromUDP(nil)
if err != nil {
panic(err)
}
_, addr2, err := udp2.ReadFromUDP(nil)
if err != nil {
panic(err)
}
// Write out the expected strings to the two pipes
_, err = udp1.WriteToUDP([]byte("Hello world"), addr1)
if err != nil {
panic(err)
}
_, err = udp2.WriteToUDP([]byte("Goodbye world"), addr2)
if err != nil {
panic(err)
}
return
}
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