bug#699: grep in eshell incorrect

[xah lee]

> Would you please care to explain what is wrong with it?  As far as I
> see, each line has a "lin" substring somewhere in it (modulo the
> evident line wrapping).


Thanks. I never realized that.

Anyway, i thought this is unexpected behavior. For example, on mac os  
x's teminal, it would give this:

[xah@xahg5][Tue Aug 12 11:37:38][~/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 11:37:40][~/web/emacs]


So, possibly the eshell's "ls" command forming multiple columns is a  
bad design. Because after all it is supposed to emulate the unix  
shell behavior and "ls | grep xyz" is common idiom.

  Xah
∑ http://xahlee.org/

☄

On Aug 12, 2008, at 11:27 AM, Eli Zaretskii wrote:

> From: xah lee <xah@xahlee.org>
> Date: Tue, 12 Aug 2008 00:01:04 -0700
> Cc:
>
>
> The “grep” utility in “eshell” is incorrect. Here's is a
> eshell log that illustrate it:
>
> ------------------------------
>
> Welcome to the Emacs shell
>
> ~/web/emacs $ which grep
> eshell/grep is a compiled Lisp function in `em-unix.el'
> ~/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 $

Would you please care to explain what is wrong with it?  As far as I
see, each line has a "lin" substring somewhere in it (modulo the
evident line wrapping).

☄