From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.help Subject: Re: Maybe we can improve this function call-process-to-string? Date: Thu, 08 Apr 2021 21:36:22 +0300 Message-ID: <83h7kg8vyx.fsf@gnu.org> References: <83a6q99pnd.fsf@gnu.org> <831rbkao9z.fsf@gnu.org> <83o8eo920g.fsf@gnu.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="2434"; mail-complaints-to="usenet@ciao.gmane.io" To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Thu Apr 08 20:37:13 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 1lUZWi-0000X7-Ht for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 08 Apr 2021 20:37:12 +0200 Original-Received: from localhost ([::1]:54126 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lUZWh-0002HP-K7 for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 08 Apr 2021 14:37:11 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:53774) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lUZWF-0002Gb-Vw for help-gnu-emacs@gnu.org; Thu, 08 Apr 2021 14:36:44 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:48205) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lUZWF-0003sK-PI for help-gnu-emacs@gnu.org; Thu, 08 Apr 2021 14:36:43 -0400 Original-Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:1423 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1lUZWE-0002eW-MM for help-gnu-emacs@gnu.org; Thu, 08 Apr 2021 14:36:43 -0400 In-Reply-To: (message from Jean Louis on Thu, 8 Apr 2021 21:17:15 +0300) 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:128909 Archived-At: > Date: Thu, 8 Apr 2021 21:17:15 +0300 > From: Jean Louis > Cc: help-gnu-emacs@gnu.org > > * 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. You can use with-current-buffer for that. > Again I have to use strings there. Depends on what you want to do with that string. My point is: whatever you want to do with the string, do it with buffer text instead. > > > 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? Yes, but only because _you_ asked a buffer-substring.