Re: waiting for asynchronous processes

[Štěpán Němec]

On Sat, 15 Oct 2011 19:20:44 +0200
Perry Smith wrote:

> I started looking for a built in way to wait for an asynchronous command to
> complete and discovered that I had written one long long time ago in a galaxy
> far far away.
>
>> (defun wait-for-async-process ( proc )
>>   "Wait for PROC to finish"
>>   (while (null (eq (process-status proc) 'exit))
>>     (accept-process-output)))

Looks like a terrible hack to me.

> I went ahead and looked for something like it in the distribution but didn't 
> see it.
>
> I'm curious if I overlooked it.

I doubt it. If you want to wait for the process in the way you seem to
want to wait for it, why don't you just use a synchronous process to
begin with? If you _do_ want the non-waiting advantage of asynchronous
processes, the usual way to handle state changes (s.a. when the process
finishes) is to use sentinels, see e.g. (info "(elisp)Sentinels").

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