зеркало из https://github.com/github/vitess-gh.git
44 строки
898 B
Go
44 строки
898 B
Go
// Copyright 2014, Google Inc. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package servenv
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import (
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"flag"
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"fmt"
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"os"
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log "github.com/golang/glog"
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)
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var pidFile = flag.String("pid_file", "", "If set, the process will write its pid to the named file, and delete it on graceful shutdown.")
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func init() {
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// Create pid file after flags are parsed.
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onInit(func() {
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if *pidFile == "" {
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return
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}
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file, err := os.Create(*pidFile)
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if err != nil {
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log.Errorf("Unable to create pid file '%s': %v", *pidFile, err)
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return
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}
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fmt.Fprintln(file, os.Getpid())
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file.Close()
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})
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// Remove pid file on graceful shutdown.
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OnClose(func() {
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if *pidFile == "" {
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return
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}
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if err := os.Remove(*pidFile); err != nil {
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log.Errorf("Unable to remove pid file '%s': %v", *pidFile, err)
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}
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})
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}
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