bug#699: grep in eshell incorrect

[xah lee]

for example, i want to use "ls | grep lin" to find file names  
containing "lin". In OSX, i do:


[xah@xahg5][Tue Aug 12 12:25:04][~/web/emacs]
ls | grep lin
elisp_link_report.el
elisp_link_report.el~
elisp_link_report.html
elisp_make_link.html
emacs_installing_packages.html
xah_emacs_linkify.el
xah_emacs_linkify.el~
[xah@xahg5][Tue Aug 12 12:25:10][~/web/emacs]

---------------------

in eshell, i get:

Welcome to the Emacs shell

/Users/xah/Documents/temp $ cd ~/web/emacs
~/web/emacs $ ls | grep lin
elisp_link_report.el                        modernization.html
elisp_link_report.el~                       modernization_html_mail.html
elisp_link_report.html                      modernization_meta_key.html
elisp_make_link.html                        ms_keyboard
emacs_installing_packages.html              wrap-url2.html.gz
emacs_manual_problem.html                   xah_emacs_linkify.el
emacs_n_unicode.html                        xah_emacs_linkify.el~
~/web/emacs $

---------------------

  Xah
∑ http://xahlee.org/

☄

On Aug 12, 2008, at 12:19 PM, Eli Zaretskii wrote:

> Cc: 699@emacsbugs.donarmstrong.com,
>  bug-gnu-emacs@gnu.org
> From: xah lee <xah@xahlee.org>
> Date: Tue, 12 Aug 2008 12:03:55 -0700
>
> Ok. I just did ls, and yes it forms multi columns.
>
> However, when i do
>
> ls | grep xyz
>
> it doesn't produce the result eshell would. i.e. the multi column
> produced by ls seems to be a done as display formatting, not as its
> real output.

Sorry, I don't understand: what's the difference between ``display
formatting'' and ``real output''?  You don't see the output of `ls'
_except_ formatted by it.

> I might be wrong... but i mean the bottom line is that "
> ls | grep some" have different behavior in unix shell and eshell.

And I see the _same_ behavior, modulo the different defaults about how
many columns to put on one line.

☄