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Re: [h-e-w] Unable to launch cygwin bash (M-x shell) in win 7 64 bit

From: Sarir Khamsi
Subject: Re: [h-e-w] Unable to launch cygwin bash (M-x shell) in win 7 64 bit
Date: Mon, 30 Jul 2012 11:11:14 -0700
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (windows-nt)

Sivaram Neelakantan <address@hidden> writes:

> I've run into this problem and I don't know where to start.  I got a
> new laptop and went about installing all the usual bits of software,
> Emacs and Cygwin.  Things mostly work as advertised....however when I
> do M-x shell, I get 


What version of Emacs are you running?

> and my cygwin configuration in my .Emacs is
> (setq exec-path  (cons "C:/gnu/bin/" exec-path))
> (setq exec-path (cons "C:/cygwin/usr/bin" (cons "C:/cygwin/bin" exec-path)))
> (setq exec-path  (cons "C:/MiKTeX2.9/miktex/bin" exec-path))
> (setenv "PATH" (concat 
> "C:\\MiKTeX2.9\\miktex\\bin;C:\\cygwin\\bin;C:\\cygwin\\usr\\bin;C:\\gnu\\bin\\;"
>  (getenv "PATH")))
> ;; NT-emacs assumes a Windows command shell, which you change
> ;; here.
> ;;
> (setq process-coding-system-alist '(("bash" . undecided-unix)))
> (setq w32-quote-process-args ?\")

I stopped using these last two commands above.

> (setq shell-file-name "/usr/bin/bash")
> ;;(setq shell-file-name "C:/cygwin/usr/bin/bash")
> (setenv "SHELL" shell-file-name) 

My version looks like the one you commented out, ie:

(setq shell-file-name "C:/cygwin/bin/bash.exe")

> (setq explicit-shell-file-name shell-file-name)
> ;; This removes unsightly ^M characters that would otherwise
> ;; appear in the output.
> ;;
> (add-hook 'comint-output-filter-functions
>          'comint-strip-ctrl-m)

I also stopped using the line above. Not sure if something changed in
Emacs 23.x or Cygwin but when I have problems like these, I start Emacs
with "emacs -q" and start adding lines from my ~/.emacs back till the
problem returns (actually, it just means evaluating lines or sections of
code till something blows up). Good luck.


Sarir Khamsi
software guy

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