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// Copyright 2018 Google 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.
// Binary uds-test-app opens a socket and reads a series of numbers
// which are then written to an output file.
package main
import (
"flag"
"fmt"
"log"
"net"
"os"
"strconv"
"time"
)
var (
fileName = flag.String("file", "", "name of output file")
socketPath = flag.String("socket", "", "path to socket")
)
func server(listener net.Listener, f *os.File) {
buf := make([]byte, 16)
for {
c, err := listener.Accept()
if err != nil {
log.Fatal("error accepting connection:", err)
}
nr, err := c.Read(buf)
if err != nil {
log.Fatal("error reading from buf:", err)
}
data := buf[0:nr]
fmt.Fprintf(f, string(data)+"\n")
}
}
func main() {
flag.Parse()
if *fileName == "" || *socketPath == "" {
log.Fatalf("Flags cannot be empty, given: fileName=%s, socketPath=%s", *fileName, *socketPath)
}
outputFile, err := os.OpenFile(*fileName, os.O_WRONLY|os.O_CREATE, 0666)
if err != nil {
log.Fatal("error opening output file:", err)
}
socket := *socketPath
defer os.Remove(socket)
listener, err := net.Listen("unix", socket)
if err != nil {
log.Fatal("error listening on socket:", err)
}
go server(listener, outputFile)
for i := 0; ; i++ {
conn, err := net.Dial("unix", socket)
if err != nil {
log.Fatal("error dialing:", err)
}
if _, err := conn.Write([]byte(strconv.Itoa(i))); err != nil {
log.Fatal("error writing:", err)
}
conn.Close()
time.Sleep(100 * time.Millisecond)
}
}
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