From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Neil Jerram Newsgroups: gmane.lisp.guile.bugs Subject: bug#33403: [Geiser-users] Data length limit in Guile/Geiser/Scheme evaluation Date: Fri, 16 Nov 2018 11:16:56 +0000 Message-ID: <875zwx1dcn.fsf__16889.0346111313$1542368230$gmane$org@ossau.homelinux.net> References: <87sh021kw2.fsf@ossau.homelinux.net> <878t1ugyf9.fsf@nicolasgoaziou.fr> <87h8gi1g5g.fsf@ossau.homelinux.net> <871s7mz357.fsf@imladris> <87bm6q1c33.fsf@ossau.homelinux.net> <87o9aq55tl.fsf@ossau.homelinux.net> <87d0r5349t.fsf@netris.org> <87y39t1olc.fsf@netris.org> <878t1t1ety.fsf@ossau.homelinux.net> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1542368230 19652 195.159.176.226 (16 Nov 2018 11:37:10 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 16 Nov 2018 11:37:10 +0000 (UTC) Cc: 33403@debbugs.gnu.org To: Mark H Weaver , geiser-users@nongnu.org, emacs-orgmode@gnu.org Original-X-From: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Fri Nov 16 12:37:06 2018 Return-path: Envelope-to: guile-bugs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1gNcQr-0004xM-No for guile-bugs@m.gmane.org; Fri, 16 Nov 2018 12:37:05 +0100 Original-Received: from localhost ([::1]:44297 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gNcSy-0007rT-56 for guile-bugs@m.gmane.org; Fri, 16 Nov 2018 06:39:16 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:40022) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gNc8W-0007Mi-8m for bug-guile@gnu.org; Fri, 16 Nov 2018 06:18:13 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gNc8Q-0003FM-H7 for bug-guile@gnu.org; Fri, 16 Nov 2018 06:18:08 -0500 Original-Received: from debbugs.gnu.org ([208.118.235.43]:50553) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1gNc8Q-0003FF-Do for bug-guile@gnu.org; Fri, 16 Nov 2018 06:18:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1gNc8Q-0003az-36 for bug-guile@gnu.org; Fri, 16 Nov 2018 06:18:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Neil Jerram Original-Sender: "Debbugs-submit" Resent-CC: bug-guile@gnu.org Resent-Date: Fri, 16 Nov 2018 11:18:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 33403 X-GNU-PR-Package: guile X-GNU-PR-Keywords: notabug Original-Received: via spool by 33403-submit@debbugs.gnu.org id=B33403.154236703313762 (code B ref 33403); Fri, 16 Nov 2018 11:18:02 +0000 Original-Received: (at 33403) by debbugs.gnu.org; 16 Nov 2018 11:17:13 +0000 Original-Received: from localhost ([127.0.0.1]:54811 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1gNc7Z-0003Zq-6a for submit@debbugs.gnu.org; Fri, 16 Nov 2018 06:17:13 -0500 Original-Received: from ossau.homelinux.net ([18.217.239.99]:53778 helo=ip-172-31-40-63.us-east-2.compute.internal) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1gNc7U-0003Z9-DM for 33403@debbugs.gnu.org; Fri, 16 Nov 2018 06:17:07 -0500 Original-Received: from smaug.ossau.homelinux.net (unknown [213.86.221.35]) by ip-172-31-40-63.us-east-2.compute.internal (Postfix) with ESMTPSA id 30A3FBD856; Fri, 16 Nov 2018 11:16:58 +0000 (UTC) In-Reply-To: <878t1t1ety.fsf@ossau.homelinux.net> X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 X-BeenThere: bug-guile@gnu.org List-Id: "Bug reports for GUILE, GNU's Ubiquitous Extension Language" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Original-Sender: "bug-guile" Xref: news.gmane.org gmane.lisp.guile.bugs:9272 Archived-At: Neil Jerram writes: > Mark H Weaver writes: > >> This is a documented limitation in Linux's terminal handling when in >> canonical mode. See the termios(3) man page, which includes this text: >> >> Canonical and noncanonical mode >> >> The setting of the ICANON canon flag in c_lflag determines >> whether the terminal is operating in canonical mode (ICANON set) >> or noncanonical mode (ICANON unset). By default, ICANON is set. > [...] >> * The maximum line length is 4096 chars (including the >> terminating newline character); lines longer than 4096 chars >> are truncated. After 4095 characters, input processing (e.g., >> ISIG and ECHO* processing) continues, but any input data after >> 4095 characters up to (but not including) any terminating >> newline is discarded. This ensures that the terminal can >> always receive more input until at least one line can be read. >> >> Note that last item above. > > Awesome; thank you Mark. > > So possibly this limit can be removed, in my Org/Geiser context, by > evaluating (system* "stty" "-icanon") when initializing the Geiser-Guile > connection. I'll try that. Will the terminal that that 'stty' sees be > the same as Guile's stdin? > > Jao, if that works, I wonder if it should be the default for Geiser? It > appears to me that Geiser shouldn't ever need the features of canonical > mode. Is that right? > > Anyway, I'll see first if the stty call is effective. Yes, with this in my ~/.guile-geiser - (system* "stty" "-icanon") - I can do evaluations past the 4K line length limit, and the Org-driven problem that I first reported [1] has disappeared. Thanks to Nicolas, Jao and Mark for your help in understanding this. Neil [1] https://lists.gnu.org/archive/html/emacs-orgmode/2018-11/msg00177.html