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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: Query about call-process
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> From: Philipp Stephani <p.stephani2@gmail.com>
> Date: Sun, 01 Apr 2018 17:21:37 +0000
> Cc: help-gnu-emacs@gnu.org
> 
>  > call-process would still wait for the process to finish.
> 
>  make-process can do that, too.
> 
> How? Probably it's some combination of make-process, process-send-region, and accept-process-output,
> but I haven't yet figured out a combination that doesn't make Emacs hang.

Calling call-process also "hangs" Emacs until the process exits.  So
there's no difference in behavior.