From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.help Subject: Re: connecting to a lost server process Date: Fri, 12 Jul 2019 10:54:28 +0300 Message-ID: <83r26v3cy3.fsf@gnu.org> References: <20190712062057.15599.qmail@localhost.localdomain> Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="124712"; mail-complaints-to="usenet@blaine.gmane.org" To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Jul 12 09:54:43 2019 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1hlqO9-000WFR-Mh for geh-help-gnu-emacs@m.gmane.org; Fri, 12 Jul 2019 09:54:41 +0200 Original-Received: from localhost ([::1]:47292 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hlqO8-0006b9-OZ for geh-help-gnu-emacs@m.gmane.org; Fri, 12 Jul 2019 03:54:40 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:44081) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hlqO5-0006aW-9A for help-gnu-emacs@gnu.org; Fri, 12 Jul 2019 03:54:38 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:51316) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hlqO5-00018v-68 for help-gnu-emacs@gnu.org; Fri, 12 Jul 2019 03:54:37 -0400 Original-Received: from [176.228.60.248] (port=3587 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1hlqO4-00022u-NM for help-gnu-emacs@gnu.org; Fri, 12 Jul 2019 03:54:37 -0400 In-reply-to: <20190712062057.15599.qmail@localhost.localdomain> (message from Madhu on 12 Jul 2019 06:20:57 -0000) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] 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.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.org gmane.emacs.help:121161 Archived-At: > Date: 12 Jul 2019 06:20:57 -0000 > From: Madhu > > The socket is still open as can be seen in /proc//fd/ - is > there some linux arcana that can be exploited to connect to it? > > Earlier it used to be possible to gdb attach to the emacs process and > to restart the server. Something like > Feval(Fcar(Fread_from_string(build_string("(server-start)"),Qnil,Qnil)),Qnil) > But for some time now that route hits a > terminate_due_to_signal. (Apparently make-network-process tries to > signal an error which calls emacs_abort which ends the show) Please report a bug with the details of that crash, it may or may not be a bug. > [Unfortunately recently the robustness of the server mechanism has gone > down - (especially since elogind). Typically I set > XDG_RUNTIME_DIR=/dev/shm/ in my environment and start a > server which i expect to survive restarts in dbus, elogind etc. That > seems no longer possible even when using a --without-x emacs.] Did you try to bind a function to sigusr1 or sigusr2 event, and have that function restore the server file?