From unknown Thu Jun 19 14:03:14 2025 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Mailer: MIME-tools 5.509 (Entity 5.509) Content-Type: text/plain; charset=utf-8 From: bug#64554 <64554@debbugs.gnu.org> To: bug#64554 <64554@debbugs.gnu.org> Subject: Status: 27.1; comint-mode cuts input after 4095 characters Reply-To: bug#64554 <64554@debbugs.gnu.org> Date: Thu, 19 Jun 2025 21:03:14 +0000 retitle 64554 27.1; comint-mode cuts input after 4095 characters reassign 64554 emacs submitter 64554 Jens Thiele severity 64554 normal thanks From debbugs-submit-bounces@debbugs.gnu.org Mon Jul 10 09:06:12 2023 Received: (at submit) by debbugs.gnu.org; 10 Jul 2023 13:06:12 +0000 Received: from localhost ([127.0.0.1]:47986 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1qIqai-0002KM-7D for submit@debbugs.gnu.org; Mon, 10 Jul 2023 09:06:12 -0400 Received: from lists.gnu.org ([209.51.188.17]:36906) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1qIqae-0002KB-BM for submit@debbugs.gnu.org; Mon, 10 Jul 2023 09:06:11 -0400 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 1qIqad-0002Zr-Ts for bug-gnu-emacs@gnu.org; Mon, 10 Jul 2023 09:06:07 -0400 Received: from ipv62.karme.de ([2a01:4f8:221:943::2] helo=jupiter.karme.de) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qIqaZ-0003EB-WE for bug-gnu-emacs@gnu.org; Mon, 10 Jul 2023 09:06:05 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=karme.de; s=exim; h=Content-Type:MIME-Version:Message-ID:Date:Subject:To:From:Sender: Reply-To:Cc:Content-Transfer-Encoding:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=7b4tqvl+RsS73x12hKwkJcdY4h8/jO89crzOXbDjG/4=; b=FOvYa08NVj/18nCcZc5t+E7XsJ D1MAZveUayKhrhIzhWtqKFXvwA10f3nkd92S7Fy4a9ox7eglM2m5dK7TTK4+RBsuG4gYlWTZsIclh /ecAOC4CticwSGMINBWQcV+2iBIaWo6nOX00msVGwVYfIeRRHScg5vxnuIbkAnjlf9Eoo7GXligkw 8rPBJ5w3uK+s6OW4l/AqUn1J5s/gQvSfvseyqZWv2O60bx+zhXEM1wwB1GWewKujav7GmCYaZG4aR zpCH/OhLsy/qf+7F4GVh+XspnGr+lFlSlyBVKpcOn+/gwt5EMt3DKGN8PdD8/vSyd7QQGNhdpsI08 n/I/6a3w==; Received: from customer (localhost [127.0.0.1]) by jupiter.karme.de with esmtps id 1qIqaS-0006Xg-IU for bug-gnu-emacs@gnu.org; Mon, 10 Jul 2023 15:05:56 +0200 Received: from karme by amalthea with local (Exim 4.94.2) (envelope-from ) id 1qIqaR-001CIA-V7 for bug-gnu-emacs@gnu.org; Mon, 10 Jul 2023 15:05:55 +0200 From: Jens Thiele To: bug-gnu-emacs@gnu.org Subject: 27.1; comint-mode cuts input after 4095 characters Date: Mon, 10 Jul 2023 11:37:38 +0200 Message-ID: <87sf9v532k.fsf@karme.de> MIME-Version: 1.0 Content-Type: text/plain X-karme-de: auth ok Received-SPF: pass client-ip=2a01:4f8:221:943::2; envelope-from=karme@karme.de; helo=jupiter.karme.de X-Spam_score_int: -4 X-Spam_score: -0.5 X-Spam_bar: / X-Spam_report: (-0.5 / 5.0 requ) BAYES_00=-1.9, DATE_IN_PAST_03_06=1.592, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-Spam-Score: -0.3 (/) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.3 (-) Hi! I see an annoying bug with comint-mode where lines are cut off after 4095 characters. How to reproduce: start comint-mode with cat: M-: (switch-to-buffer (make-comint "cat" "cat")) insert 10000 u's C-u 10000 u RET and get only 4095 u's back in return (where of course 10000 should be returned) greetings Jens From debbugs-submit-bounces@debbugs.gnu.org Mon Jul 10 09:24:49 2023 Received: (at 64554) by debbugs.gnu.org; 10 Jul 2023 13:24:50 +0000 Received: from localhost ([127.0.0.1]:48009 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1qIqsi-0002or-6v for submit@debbugs.gnu.org; Mon, 10 Jul 2023 09:24:49 -0400 Received: from eggs.gnu.org ([209.51.188.92]:33878) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1qIqsd-0002oZ-2F for 64554@debbugs.gnu.org; Mon, 10 Jul 2023 09:24:46 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qIqsX-0004x7-3T; Mon, 10 Jul 2023 09:24:37 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=4zpvJvJfhrq/OKwBqfRGnuL1okg5BZIFIT01tWKTdNY=; b=kJwels6oxShb kV+n21doI+A16d5kYrNqfXx3XHPuVEvJDIQNVxx2gXiAVuk99JeCw3BydyT+YqkwrsoKkeyXyKP7r fCt0imEfE6JjfVqZL9KfW6RA+Kr9bgS0LucazGi7Y9fSgOks/ccOIwoYffiIx0WKS/9bqk7GL2TFA rlA6QMET8/O/ETgbiqMM6ABQvDK8Ou3x0yeDxGxE3dWnRKEjXmvO/W2uOtDc86QvMljy+1oWjI/DY kNcZtJ6vB7k7CnucbUrwXBV44O+3bw2OZy1SaGX4t0GTrIPs7jhj6Td8s481xXJer0xf5OHG7L2Ox gBXHriNS9DwckRIKg6l4+Q==; Received: from [87.69.77.57] (helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qIqsW-00043C-J4; Mon, 10 Jul 2023 09:24:36 -0400 Date: Mon, 10 Jul 2023 16:24:45 +0300 Message-Id: <83mt0399wi.fsf@gnu.org> From: Eli Zaretskii To: Jens Thiele In-Reply-To: <87sf9v532k.fsf@karme.de> (message from Jens Thiele on Mon, 10 Jul 2023 11:37:38 +0200) Subject: Re: bug#64554: 27.1; comint-mode cuts input after 4095 characters References: <87sf9v532k.fsf@karme.de> X-Spam-Score: -0.0 (/) X-Debbugs-Envelope-To: 64554 Cc: 64554@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Jens Thiele > Date: Mon, 10 Jul 2023 11:37:38 +0200 > > I see an annoying bug with comint-mode where lines are cut off after > 4095 characters. > > How to reproduce: > start comint-mode with cat: > M-: (switch-to-buffer (make-comint "cat" "cat")) > insert 10000 u's > C-u 10000 u RET > and get only 4095 u's back in return (where of course 10000 should be returned) Set process-connection-type to nil if you want to send more than 4KB to a process. AFAIR, this is a fundamental limitation of PTYs, which are used by default for communicating with async subprocesses. Setting process-connection-type to nil uses pipes instead. See https://unix.stackexchange.com/questions/643777/is-there-any-limit-on-line-length-when-pasting-to-a-terminal-in-linux