From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Miguel Guedes <miguel.a.guedes@gmail.com> Newsgroups: gmane.emacs.devel Subject: process.c: read_process_output: hard coded 4096 bytes read limit Date: Sat, 22 Jun 2013 10:05:10 +0000 (UTC) Message-ID: <kq3ssm$b00$1@ger.gmane.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Trace: ger.gmane.org 1371895536 12090 80.91.229.3 (22 Jun 2013 10:05:36 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 22 Jun 2013 10:05:36 +0000 (UTC) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Jun 22 12:05:37 2013 Return-path: <emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org> Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from <emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org>) id 1UqKhM-0002F0-3K for ged-emacs-devel@m.gmane.org; Sat, 22 Jun 2013 12:05:36 +0200 Original-Received: from localhost ([::1]:53569 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from <emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org>) id 1UqKhL-0003LG-MR for ged-emacs-devel@m.gmane.org; Sat, 22 Jun 2013 06:05:35 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:55063) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from <ged-emacs-devel@m.gmane.org>) id 1UqKhI-0003L0-E1 for emacs-devel@gnu.org; Sat, 22 Jun 2013 06:05:33 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <ged-emacs-devel@m.gmane.org>) id 1UqKhH-0000PE-Lu for emacs-devel@gnu.org; Sat, 22 Jun 2013 06:05:32 -0400 Original-Received: from plane.gmane.org ([80.91.229.3]:58024) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <ged-emacs-devel@m.gmane.org>) id 1UqKhH-0000Oy-FV for emacs-devel@gnu.org; Sat, 22 Jun 2013 06:05:31 -0400 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from <ged-emacs-devel@m.gmane.org>) id 1UqKhF-00027D-EZ for emacs-devel@gnu.org; Sat, 22 Jun 2013 12:05:29 +0200 Original-Received: from 176.24.186.11 ([176.24.186.11]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for <emacs-devel@gnu.org>; Sat, 22 Jun 2013 12:05:29 +0200 Original-Received: from miguel.a.guedes by 176.24.186.11 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for <emacs-devel@gnu.org>; Sat, 22 Jun 2013 12:05:29 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 17 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: 176.24.186.11 User-Agent: Pan/0.139 (Sexual Chocolate; GIT bf56508 git://git.gnome.org/pan2) X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." <emacs-devel.gnu.org> List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-devel>, <mailto:emacs-devel-request@gnu.org?subject=unsubscribe> List-Archive: <http://lists.gnu.org/archive/html/emacs-devel> List-Post: <mailto:emacs-devel@gnu.org> List-Help: <mailto:emacs-devel-request@gnu.org?subject=help> List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-devel>, <mailto:emacs-devel-request@gnu.org?subject=subscribe> Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:160878 Archived-At: <http://permalink.gmane.org/gmane.emacs.devel/160878> Hello List, In process.c, function read_process_output, all reads are limited to a maximum of 4096 bytes. What is the rationale behind imposing a hardcoded limit of 4096 bytes per read from a process channel? (why isn't the user allowed to specify this read limit when creating a process/ connection?) A minor mode I've written that sometimes receives 500-800KB of data as a response from an async network connection (opened via make-network- process) takes several seconds to fully receive the data due to the hard coded limit mentioned above and the fact that emacs waits between reads (probably in wait_reading_process_output upon receiving a signal in sigchld_handler). -- Miguel