英文:
Go - close an external application
问题
我正在使用OSX机器上的Go，并尝试编写一个程序来打开一个外部应用程序，然后在几秒钟后关闭它 - 关闭应用程序，而不是退出Go脚本。
我正在使用https://github.com/skratchdot/open-golang上可用的库来启动应用程序，它运行良好。我已经设置了超时。但是当我需要关闭应用程序时，问题就出现了。
有人能给我一个提示，我如何退出应用程序吗？
提前感谢。
英文:
I'm using Go on an OSX machine and trying to make a program to open an external application and then after few seconds, close it - the application, not exit the Go script.
I'm using the library available on https://github.com/skratchdot/open-golang to start the app and it works fine. I also already have the timeout running. But the problem comes when I have to close the application.
Would someone give a hint of how I would be able to exit the app?
Thanks in advance.
答案1
得分: 2
看起来这个库隐藏了你用来关闭程序的细节，特别是进程ID（PID）。
如果你改用os/exec包启动程序或获取该PID的句柄，你可以使用Process对象来终止或发送信号给应用程序，尝试优雅地关闭它。
https://golang.org/pkg/os/#Process
英文:
It looks like that library is hiding details that you'd use to close the program, specifically the process ID (PID).
If you launch instead with the os/exec package or get a handle on that PID then you can use the Process object to kill or send signals to the app to try and close it gracefully.
答案2
得分: 1
谢谢大家的帮助。我能够通过以下代码实现我想要的功能。
cmd := exec.Command(path string)
err := cmd.Start()
if err != nil {
log.Printf("Command finished with error: %v", err)
}
done := make(chan error, 1)
go func() {
done <- cmd.Wait()
}()
select {
case <-time.After(30 * time.Second): // 在30秒后终止进程
if err := cmd.Process.Kill(); err != nil {
log.Fatal("failed to kill: ", err)
}
<-done // 允许goroutine退出
log.Println("process killed")
indexInit()
case err := <-done:
if err != nil {
log.Printf("process done with error = %v", err)
}
}
if err != nil {
log.Fatal(err)
}
log.Printf("Waiting for command to finish...")
//timer() // 时间流逝...
err = cmd.Wait()
我将这段代码放在使用os/exec包启动应用程序之后，就像@JimB建议的那样。
英文:
Thank you guys for the help. I would able to do what I was trying with the following code.
cmd := exec.Command(path string)
err := cmd.Start()
if err != nil {
log.Printf("Command finished with error: %v", err)
}
done := make(chan error, 1)
go func() {
done <- cmd.Wait()
}()
select {
case <-time.After(30 * time.Second): // Kills the process after 30 seconds
if err := cmd.Process.Kill(); err != nil {
log.Fatal("failed to kill: ", err)
}
<-done // allow goroutine to exit
log.Println("process killed")
indexInit()
case err := <-done:
if err!=nil{
log.Printf("process done with error = %v", err)
}
}
if err != nil {
log.Fatal(err)
}
log.Printf("Waiting for command to finish...")
//timer() // The time goes by...
err = cmd.Wait()
}
I placed that right after start the app with the os/exec package as @JimB recommended.
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