main.go

Documentation: golang.org/x/sys/windows/svc/example

     1  // Copyright 2012 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build windows
     6  
     7  // Example service program that beeps.
     8  //
     9  // The program demonstrates how to create Windows service and
    10  // install / remove it on a computer. It also shows how to
    11  // stop / start / pause / continue any service, and how to
    12  // write to event log. It also shows how to use debug
    13  // facilities available in debug package.
    14  package main
    15  
    16  import (
    17  	"flag"
    18  	"fmt"
    19  	"log"
    20  	"os"
    21  	"strings"
    22  
    23  	"golang.org/x/sys/windows/svc"
    24  )
    25  
    26  func usage(errmsg string) {
    27  	fmt.Fprintf(os.Stderr,
    28  		"%s\n\n"+
    29  			"usage: %s <command>\n"+
    30  			"       where <command> is one of\n"+
    31  			"       install, remove, debug, start, stop, pause or continue.\n",
    32  		errmsg, os.Args[0])
    33  	os.Exit(2)
    34  }
    35  
    36  var svcName = "exampleservice"
    37  
    38  func main() {
    39  	flag.StringVar(&svcName, "name", svcName, "name of the service")
    40  	flag.Parse()
    41  
    42  	inService, err := svc.IsWindowsService()
    43  	if err != nil {
    44  		log.Fatalf("failed to determine if we are running in service: %v", err)
    45  	}
    46  	if inService {
    47  		runService(svcName, false)
    48  		return
    49  	}
    50  
    51  	if len(os.Args) < 2 {
    52  		usage("no command specified")
    53  	}
    54  
    55  	cmd := strings.ToLower(os.Args[1])
    56  	switch cmd {
    57  	case "debug":
    58  		runService(svcName, true)
    59  		return
    60  	case "install":
    61  		err = installService(svcName, "example service")
    62  	case "remove":
    63  		err = removeService(svcName)
    64  	case "start":
    65  		err = startService(svcName)
    66  	case "stop":
    67  		err = controlService(svcName, svc.Stop, svc.Stopped)
    68  	case "pause":
    69  		err = controlService(svcName, svc.Pause, svc.Paused)
    70  	case "continue":
    71  		err = controlService(svcName, svc.Continue, svc.Running)
    72  	default:
    73  		usage(fmt.Sprintf("invalid command %s", cmd))
    74  	}
    75  	if err != nil {
    76  		log.Fatalf("failed to %s %s: %v", cmd, svcName, err)
    77  	}
    78  	return
    79  }
    80
View as plain text