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bug#699: grep in eshell incorrect


From: xah lee
Subject: bug#699: grep in eshell incorrect
Date: Tue, 12 Aug 2008 11:40:25 -0700


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:

address@hidden 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~
address@hidden 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 <address@hidden>
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).

☄








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