From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eric Abrahamsen Newsgroups: gmane.emacs.help Subject: Re: reading from standard input in batch mode Date: Tue, 22 May 2018 14:07:14 -0700 Message-ID: <87vabfxuv1.fsf@ericabrahamsen.net> References: <87efi3zbrb.fsf@ericabrahamsen.net> <874lizzah6.fsf@ericabrahamsen.net> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1527023336 31172 195.159.176.226 (22 May 2018 21:08:56 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 22 May 2018 21:08:56 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Tue May 22 23:08:52 2018 Return-path: Envelope-to: geh-help-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 1fLEWZ-0007zS-Nr for geh-help-gnu-emacs@m.gmane.org; Tue, 22 May 2018 23:08:51 +0200 Original-Received: from localhost ([::1]:57948 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fLEYf-0007A5-CO for geh-help-gnu-emacs@m.gmane.org; Tue, 22 May 2018 17:11:01 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:58076) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fLEXy-00078s-I4 for help-gnu-emacs@gnu.org; Tue, 22 May 2018 17:10:19 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fLEXv-0000bh-6M for help-gnu-emacs@gnu.org; Tue, 22 May 2018 17:10:18 -0400 Original-Received: from [195.159.176.226] (port=51745 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fLEXu-0000aX-Vj for help-gnu-emacs@gnu.org; Tue, 22 May 2018 17:10:15 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1fLEVj-0007BT-SL for help-gnu-emacs@gnu.org; Tue, 22 May 2018 23:07:59 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 32 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:nehP5WMxkOzj6q47ETlLsuXQ9xk= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 195.159.176.226 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.21 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:116817 Archived-At: Noam Postavsky writes: > On 22 May 2018 at 16:44, Eric Abrahamsen wrote: > >>> (shell-command >>> "emacs -Q --batch -l boomerang.el -f boomerang \"hi there\"") >>> >>> The subordinate emacs starts and finishes (returning 255, which just >>> came up on a thread in emacs.devel, I think), but no file is written. As >>> far as I know, `read' should be reading from standard-input in this >>> case. What am I doing wrong? >> >> I figured it out, it should have been (read t). Ignore me! > > Shouldn't it have been: > > (shell-command > "echo \"hi there\" | emacs -Q --batch -l boomerang.el -f boomerang") Of course -- I don't know why I thought passing a string as an argument would work. Turns out I needed: $ echo "\"hi there\"" So that the string was a string, but that was easy to figure out. The output unfortunately also contains the string "Lisp expression:" but I can probably figure that out, too. Thanks! Eric