终止后子进程进行清理

Question

I want to run another binary from go app with something like:

cmd := exec.Command("another_app_binary", "-config", "config.conf")
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
cmd.Run()

When I kill the parent process(code above), child process(another_app_binary) becomes orphan. What options do I have to cleanup child processes after parent exits/TERMINATES? It has to be somewhat platform nutural because I plan to run it on win/linux.

Answer 1

You can use the os/signal package to listen for the kill signal in your current process.

import (
    "os/exec"
    "os"
    "os/signal"
)

// ...

cmd := exec.Command("another_app_binary", "-config", "config.conf")
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
cmd.Run()

c := make(chan os.Signal, 2)
signal.Notify(c, os.Interrupt, os.Kill)
go func() {
    <-c
    // cleanup
    cmd.Process.Kill()
    os.Exit(1)
}()

// ...