From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Jean Louis Newsgroups: gmane.emacs.help Subject: Re: Maybe we can improve this function call-process-to-string? Date: Thu, 8 Apr 2021 21:17:15 +0300 Message-ID: References: <83a6q99pnd.fsf@gnu.org> <831rbkao9z.fsf@gnu.org> <83o8eo920g.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="8156"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/2.0.6 (2021-03-06) Cc: help-gnu-emacs@gnu.org To: Eli Zaretskii Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Thu Apr 08 20:21:28 2021 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lUZHT-0001zx-W1 for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 08 Apr 2021 20:21:27 +0200 Original-Received: from localhost ([::1]:36352 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lUZHT-0002Ti-0E for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 08 Apr 2021 14:21:27 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:49594) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lUZGl-0002SZ-ES for help-gnu-emacs@gnu.org; Thu, 08 Apr 2021 14:20:43 -0400 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:59053) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lUZGe-0002po-Rc; Thu, 08 Apr 2021 14:20:43 -0400 Original-Received: from localhost ([::ffff:41.202.241.27]) (AUTH: PLAIN securesender, TLS: TLS1.3,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 000000000001DF49.00000000606F496B.0000132D; Thu, 08 Apr 2021 11:20:27 -0700 Mail-Followup-To: Eli Zaretskii , help-gnu-emacs@gnu.org Content-Disposition: inline In-Reply-To: <83o8eo920g.fsf@gnu.org> Received-SPF: pass client-ip=217.170.207.13; envelope-from=bugs@gnu.support; helo=stw1.rcdrun.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:128906 Archived-At: * Eli Zaretskii [2021-04-08 19:30]: > So you actually need the numbers reported by those commands? if so, > you can read them from the buffer into which the command's output is > stored, right? You don't actually need the numbers in their string > form, right? In that particular example numbers are just used as string, but sometimes I need numbers. That may not be most important. I do not understand your method of getting output from external command. How practically to do it? I understood reading it from buffer is different than reading from shell-command-to-string. Then to have output in buffer, I need call-process, but then again I need to enter that buffer and read string out of it. Example is here: (defun call-process-to-string (program &optional infile display &rest args) (let* ((buffer-name "RCD Emacs Lisp output") (buffer (generate-new-buffer buffer-name)) (status (apply #'call-process program infile buffer display args)) (current-buffer (current-buffer)) (output (buffer-to-string buffer))) (kill-buffer buffer) output)) Again I have to use strings there. > > I would not know how to get output from system command by using those > > functions without using shell-command-to-string or call-process > > You said buffer-substring doesn't take a buffer as an argument. I'm > suggesting something like > > (with-current-buffer (get-buffer "foo") > (buffer-substring ...)) That again comes back as a string, right? I do use that type, in the above function for example. Jean