From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#24287: Process filters received stderr output, not documented Date: Mon, 22 Aug 2016 21:23:08 +0300 Message-ID: <83y43ofysz.fsf@gnu.org> References: Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: blaine.gmane.org 1471890358 12551 195.159.176.226 (22 Aug 2016 18:25:58 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 22 Aug 2016 18:25:58 +0000 (UTC) Cc: 24287@debbugs.gnu.org To: "Paul A. Steckler" Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Aug 22 20:25:51 2016 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1bbtuw-0002uq-Kw for geb-bug-gnu-emacs@m.gmane.org; Mon, 22 Aug 2016 20:25:50 +0200 Original-Received: from localhost ([::1]:42672 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bbtut-00089N-Vx for geb-bug-gnu-emacs@m.gmane.org; Mon, 22 Aug 2016 14:25:48 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:49798) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bbttI-0006ne-4x for bug-gnu-emacs@gnu.org; Mon, 22 Aug 2016 14:24:09 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bbttC-0007tu-16 for bug-gnu-emacs@gnu.org; Mon, 22 Aug 2016 14:24:07 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:39429) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bbttB-0007ti-Tx for bug-gnu-emacs@gnu.org; Mon, 22 Aug 2016 14:24:01 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1bbttB-0007EX-Mx for bug-gnu-emacs@gnu.org; Mon, 22 Aug 2016 14:24:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 22 Aug 2016 18:24:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 24287 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 24287-submit@debbugs.gnu.org id=B24287.147189018927746 (code B ref 24287); Mon, 22 Aug 2016 18:24:01 +0000 Original-Received: (at 24287) by debbugs.gnu.org; 22 Aug 2016 18:23:09 +0000 Original-Received: from localhost ([127.0.0.1]:37141 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bbtsL-0007DS-0P for submit@debbugs.gnu.org; Mon, 22 Aug 2016 14:23:09 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:58603) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bbtsJ-0007DF-HT for 24287@debbugs.gnu.org; Mon, 22 Aug 2016 14:23:07 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bbts9-0007dg-C7 for 24287@debbugs.gnu.org; Mon, 22 Aug 2016 14:23:02 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:39086) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bbts9-0007db-9f; Mon, 22 Aug 2016 14:22:57 -0400 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:3300 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.82) (envelope-from ) id 1bbts7-0001mO-EP; Mon, 22 Aug 2016 14:22:55 -0400 In-reply-to: (steck@stecksoft.com) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] 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-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:122516 Archived-At: > From: "Paul A. Steckler" > Date: Mon, 22 Aug 2016 13:35:25 -0400 > > The documentation for Process Filter Functions mentions that process > filters receive the standard output from their associated processes. It > does not mention that the filters also receive standard error output. That is described in the parent section: It is impossible to separate the standard output and standard error streams of the subprocess, because Emacs normally spawns the subprocess inside a pseudo-TTY, and a pseudo-TTY has only one output channel. If you want to keep the output to those streams separate, you should redirect one of them to a file—for example, by using an appropriate shell command.