golang实现daemon守护进程，支持goroutine和系统信号监听

网上看了好多解决方案，要不就是不支持goroutine, 要不就是不支持系统信号监听。自己尝试了一下，算是可以是满足需求了

package main
import (

"os"

"fmt"

"os/signal"

"syscall"

"time"

"log"

"os/exec"

)

func init() {

if os.Getppid() != 1{

cmd := exec.Command(os.Args[0], os.Args[1:]...)

cmd.Start()

os.Exit(0)

}
<span class="highlight-c1">// 监听系统信号

    go func() {

_c := make(chan os.Signal, 1)

signal.Notify(_c, os.Interrupt, syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT, syscall.SIGKILL, syscall.SIGTSTP)

msg := <- _c

log.Println(msg)

os.Exit(0)

}()

}
func main()  {
<span class="highlight-k">go</span> <span class="highlight-kd">func</span><span class="highlight-p">(){</span>
    <span class="highlight-nx">fp</span><span class="highlight-p">,</span> <span class="highlight-nx">_</span> <span class="highlight-o">:=</span> <span class="highlight-nx">os</span><span class="highlight-p">.</span><span class="highlight-nf">OpenFile</span><span class="highlight-p">(</span><span class="highlight-s">&#34;log&#34;</span><span class="highlight-p">,</span> <span class="highlight-nx">os</span><span class="highlight-p">.</span><span class="highlight-nx">O_WRONLY</span><span class="highlight-p">|</span><span class="highlight-nx">os</span><span class="highlight-p">.</span><span class="highlight-nx">O_CREATE</span><span class="highlight-p">|</span><span class="highlight-nx">os</span><span class="highlight-p">.</span><span class="highlight-nx">O_APPEND</span><span class="highlight-p">,</span> <span class="highlight-mo">0644</span><span class="highlight-p">)</span>
    <span class="highlight-nx">log</span><span class="highlight-p">.</span><span class="highlight-nf">SetOutput</span><span class="highlight-p">(</span><span class="highlight-nx">fp</span><span class="highlight-p">)</span>
    <span class="highlight-k">for</span><span class="highlight-p">{</span>
        <span class="highlight-nx">log</span><span class="highlight-p">.</span><span class="highlight-nf">Println</span><span class="highlight-p">(</span><span class="highlight-nx">fmt</span><span class="highlight-p">.</span><span class="highlight-nf">Sprint</span><span class="highlight-p">(</span><span class="highlight-s">&#34;hello &#34;</span><span class="highlight-p">,</span> <span class="highlight-nx">os</span><span class="highlight-p">.</span><span class="highlight-nf">Getpid</span><span class="highlight-p">()))</span>
        <span class="highlight-nx">time</span><span class="highlight-p">.</span><span class="highlight-nf">Sleep</span><span class="highlight-p">(</span><span class="highlight-nx">time</span><span class="highlight-p">.</span><span class="highlight-nx">Second</span> <span class="highlight-o">*</span> <span class="highlight-mi">5</span><span class="highlight-p">)</span>
    <span class="highlight-p">}</span>
<span class="highlight-p">}()</span>

<span class="highlight-k">for</span><span class="highlight-p">{</span>
    <span class="highlight-nx">time</span><span class="highlight-p">.</span><span class="highlight-nf">Sleep</span><span class="highlight-p">(</span><span class="highlight-nx">time</span><span class="highlight-p">.</span><span class="highlight-nx">Second</span> <span class="highlight-o">*</span> <span class="highlight-mi">1000</span><span class="highlight-p">)</span>
<span class="highlight-p">}</span>

}

来源：https://www.cnblogs.com/walkerwang731/p/10825608.html