<p>I'm writing a small <code>watch</code> program that spawns a long-running subprocess and automatically restarts it when changes are detected in the filesystem. It seems to be working, except for when I try to catch SIGINT in the spawned subprocess to give it a chance to clean up before exiting, which is strange since catching SIGINT works fine in <code>watch</code>.</p>
<p>Both programs have a snippet like this that listens for interrupt signals (for graceful cleanup in the subprocess, and to pass the signal along in <code>watch</code>):</p>
<pre><code>c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
go func() {
for sig := range c {
// handle sig
}
}()
</code></pre>
<p>and then when a change is detected, <code>watch</code> calls <code>Signal(os.Interrupt)</code> on the subprocess to tell it to quit, but it never works. Sending <code>os.Kill</code> successfully kills the process, but also is never caught. Yet pressing Ctrl-C on <code>watch</code> reveals that the same signal handler code works there.</p>
<p>Is what I'm trying to do possible?</p>
<hr/>**评论：**<br/><br/>meowtasticly: <pre><p>I've just been through all of this at work lately. Found that the os library has issues like this but sending signals through the methods in the syscall library worked just fine.</p>
<p>On mobile atm so I don't have perfect code examples, but the code I went with was along the lines of</p>
<p>syscall.Kill(childpid, syscall.SIGINT)</p></pre>
