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#29157: 25.3; Eshell parsing fails sometimes, e.g. "date" and "sed" Date: Sat, 25 Nov 2017 21:50:05 +0200 Message-ID: <83wp2e6suq.fsf@gnu.org> References: <87tvy9rm5z.fsf@gmail.com> <87lgjk7rpd.fsf@users.sourceforge.net> <87lgjkoloe.fsf@gmail.com> <87shd5znzf.fsf@users.sourceforge.net> <87po891o1t.fsf@gmail.com> <87po89ywv5.fsf@users.sourceforge.net> <8360a1arlf.fsf@gnu.org> <87lgiui6qc.fsf@gmail.com> <871skmyyyh.fsf@users.sourceforge.net> 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 1511639482 3922 195.159.176.226 (25 Nov 2017 19:51:22 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 25 Nov 2017 19:51:22 +0000 (UTC) Cc: 29157@debbugs.gnu.org, ambrevar@gmail.com To: Noam Postavsky Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Nov 25 20:51:13 2017 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 1eIgTl-0000HG-7D for geb-bug-gnu-emacs@m.gmane.org; Sat, 25 Nov 2017 20:51:09 +0100 Original-Received: from localhost ([::1]:54223 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eIgTs-00076f-Fo for geb-bug-gnu-emacs@m.gmane.org; Sat, 25 Nov 2017 14:51:16 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:34224) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eIgTj-00076K-1P for bug-gnu-emacs@gnu.org; Sat, 25 Nov 2017 14:51:09 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eIgTe-00052h-6q for bug-gnu-emacs@gnu.org; Sat, 25 Nov 2017 14:51:07 -0500 Original-Received: from debbugs.gnu.org ([208.118.235.43]:49543) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1eIgTe-00052W-2d for bug-gnu-emacs@gnu.org; Sat, 25 Nov 2017 14:51:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1eIgTd-0001ac-Sj for bug-gnu-emacs@gnu.org; Sat, 25 Nov 2017 14:51:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 25 Nov 2017 19:51:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 29157 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 29157-submit@debbugs.gnu.org id=B29157.15116394476087 (code B ref 29157); Sat, 25 Nov 2017 19:51:01 +0000 Original-Received: (at 29157) by debbugs.gnu.org; 25 Nov 2017 19:50:47 +0000 Original-Received: from localhost ([127.0.0.1]:58224 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eIgTO-0001a6-VX for submit@debbugs.gnu.org; Sat, 25 Nov 2017 14:50:47 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:43148) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eIgTM-0001Zu-SU for 29157@debbugs.gnu.org; Sat, 25 Nov 2017 14:50:46 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eIgT9-0004jS-Dl for 29157@debbugs.gnu.org; Sat, 25 Nov 2017 14:50:36 -0500 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:60921) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eIgT9-0004jL-9n; Sat, 25 Nov 2017 14:50:31 -0500 Original-Received: from [176.228.60.248] (port=4505 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1eIgT7-00009d-Gd; Sat, 25 Nov 2017 14:50:31 -0500 In-reply-to: <871skmyyyh.fsf@users.sourceforge.net> (message from Noam Postavsky on Sat, 25 Nov 2017 13:50:46 -0500) 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:140378 Archived-At: > From: Noam Postavsky > Cc: Eli Zaretskii , 29157@debbugs.gnu.org > Date: Sat, 25 Nov 2017 13:50:46 -0500 > > >> That doesn't sound right to me (for rm as well): it will fail in > >> strange ways for systems where the external command is absent or > >> deficient. > > Currently eshell falls back to external command for unrecognized > arguments when passing :external to eshell-eval-using-options. A quick > grep for :external brings up: rm, mkdir, rmdir, mv, cp, ln, cat, du, > time, env, ls. By "unrecognized arguments" do you mean unrecognized switches? If so, this is not the same issue as the one I was raising. > >> Observe: > >> > >> ~/git/emacs/branch $ date 42 > >> Wed Dec 31 19:00:42 1969 > >> But > >> ~/git/emacs/branch $ *date 42 > >> /bin/date: invalid date ‘42’ > >> > >> So I'm not sure such a naïve solution is TRT in this case, because we > >> are losing valuable features by doing that, > > So we could also check for an integer argument. But it isn't just integers: ~ $ date 42 "EDT-5" Thu Jan 1 05:00:42 1970 ~ $ date (list 23065 51329 644000 0) Sat Nov 25 21:46:09 2017 > >> and those features are not > >> just an accident, they were intentionally included in Eshell. > > Hmm, my impression of eshell is more like "throw a bunch of features at > the wall and see what sticks" but without the "see what sticks" part. That's one way of looking at Eshell, although it's not my way. Eshell was intended to be used from Lisp programs, and that's why its built-ins accept Lisp objects, values, and expressions as arguments.