From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Max Nikulin Newsgroups: gmane.emacs.devel Subject: Re: How to get DISPLAY of emacsclient? Date: Sat, 26 Nov 2022 10:36:30 +0700 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="20654"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.2 To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Nov 26 08:14:37 2022 Return-path: Envelope-to: ged-emacs-devel@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 1oypOX-0005Fa-Nn for ged-emacs-devel@m.gmane-mx.org; Sat, 26 Nov 2022 08:14:37 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oypNv-0000YG-Fh; Sat, 26 Nov 2022 02:13:59 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oylzc-0005x0-Sa for emacs-devel@gnu.org; Fri, 25 Nov 2022 22:36:41 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oylzb-0006wb-8M for emacs-devel@gnu.org; Fri, 25 Nov 2022 22:36:40 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1oylzY-0006Vt-AO for emacs-devel@gnu.org; Sat, 26 Nov 2022 04:36:36 +0100 X-Injected-Via-Gmane: http://gmane.org/ Content-Language: en-US In-Reply-To: Received-SPF: pass client-ip=116.202.254.214; envelope-from=ged-emacs-devel@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: 28 X-Spam_score: 2.8 X-Spam_bar: ++ X-Spam_report: (2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_ADSP_CUSTOM_MED=0.001, FORGED_GMAIL_RCVD=1, FORGED_MUA_MOZILLA=2.309, FREEMAIL_FORGED_FROMDOMAIN=0.243, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.25, NICE_REPLY_A=-0.001, NML_ADSP_CUSTOM_MED=0.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Sat, 26 Nov 2022 02:13:58 -0500 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:300549 Archived-At: On 25/11/2022 23:57, Stefan Monnier wrote: >> Unfortunately the value of following expression is the DISPLAY environment >> of the server process >> >> emacsclient --eval '(getenv "DISPLAY")' > > There are different ways which will give you different answers in > different cases: > > - you can check the `display` parameter of the selected frame (should > handle the `emacsclient --display` case). emacsclient --display "$DISPLAY" \ --eval "(frame-parameter (selected-frame) 'display)" may be a workaround, thank you for the idea. A caveat is that --display parameter becomes mandatory, DISPLAY environment is not enough: emacsclient --eval "(frame-parameter (selected-frame) 'display)" nil Emacs daemon may have no x frames yet at the moment of emacsclient invocation. > - you can check the `environment` parameter of the selected frame > (probably not very useful). emacsclient --display :0 \ --eval "(frame-parameter (selected-frame) 'environment)" nil > - You can check the `env` parameter (with `process-get`) of the proc > object that represents (on Emacs's side) the emacsclient connection. > For that you'll need to get access to this proc object, but I don't > know offhand how to. I am unsure that -display argument is added to the `env` parameter. I do not like the following approach since I am afraid of races. Anyway it does not work emacsclient --eval "(process-get (car server-clients) 'env)" So I have no idea how to access `proc` passed to a process filter as well. Though it does not answer to the question how to get DISPLAY, the following is at least a workaround: DISPLAY= emacs -q --daemon emacsclient --display "$DISPLAY" \ --eval "(require 'org)" \ --eval "(org-get-x-clipboard 'PRIMARY)"