github.com/cellofellow/gopkg@v0.0.0-20140722061823-eec0544a62ad/osext/winsvc/example/manage.go (about)

     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  package main
     6  
     7  import (
     8  	"chai2010.gopkg/osext/winsvc/mgr"
     9  	"chai2010.gopkg/osext/winsvc/svc"
    10  	"fmt"
    11  	"time"
    12  )
    13  
    14  func startService(name string) error {
    15  	m, err := mgr.Connect()
    16  	if err != nil {
    17  		return err
    18  	}
    19  	defer m.Disconnect()
    20  	s, err := m.OpenService(name)
    21  	if err != nil {
    22  		return fmt.Errorf("could not access service: %v", err)
    23  	}
    24  	defer s.Close()
    25  	err = s.Start([]string{"p1", "p2", "p3"})
    26  	if err != nil {
    27  		return fmt.Errorf("could not start service: %v", err)
    28  	}
    29  	return nil
    30  }
    31  
    32  func controlService(name string, c svc.Cmd, to svc.State) error {
    33  	m, err := mgr.Connect()
    34  	if err != nil {
    35  		return err
    36  	}
    37  	defer m.Disconnect()
    38  	s, err := m.OpenService(name)
    39  	if err != nil {
    40  		return fmt.Errorf("could not access service: %v", err)
    41  	}
    42  	defer s.Close()
    43  	status, err := s.Control(c)
    44  	if err != nil {
    45  		return fmt.Errorf("could not send control=%d: %v", c, err)
    46  	}
    47  	timeout := time.Now().Add(10 * time.Second)
    48  	for status.State != to {
    49  		if timeout.Before(time.Now()) {
    50  			return fmt.Errorf("timeout waiting for service to go to state=%d", to)
    51  		}
    52  		time.Sleep(300 * time.Millisecond)
    53  		status, err = s.Query()
    54  		if err != nil {
    55  			return fmt.Errorf("could not retrieve service status: %v", err)
    56  		}
    57  	}
    58  	return nil
    59  }