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Re: problem using call-process with grep
From: |
David Kastrup |
Subject: |
Re: problem using call-process with grep |
Date: |
Sat, 24 Dec 2005 00:20:09 +0100 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) |
"Drew Adams" <address@hidden> writes:
> > (call-process "grep" nil
> > (generate-new-buffer "Result")
> > nil "epsilon\\($\\)" "foo")
> >
> > This does *not* work for me.
>
> I guess you want to call some echo-like program compiled in the same
> way as your "grep" to see what actually is happening here. Probably
> some part of Cygwin's Unix emulation layer is trying variable
> substitution or replacing backward with forward slashes or adding
> quotes or something like that.
>
> Could you be more specific on what to try?
Use /bin/echo instead of grep. Something like that.
> I also don't understand how this could be a Cygwin problem
Because Emacs might be compiled with Cygwin? Because it might try to
interact with Cygwin?
> But you made me think of another possibility. Could it be that
> `call-process' somehow processes its arguments in such a way that it
> applies Windows-to-Unix directory-separator conversion to all of
> them, flipping backslashes to slashes?
>
> I don't think so. For instance, if I use this regexp, it works OK:
> "eps\\ilon$". If backslashes were changed to slashes, then this
> would not match "epsilon" in the file.
>
> Another regexp that doesn't work: "gamma\\(,\\)" - just to show that
> the problem is with \(...\), not with $ (variable substitution).
Well, maybe what arrives at the application level is gamma(,) without
backslashed at all.
--
David Kastrup, Kriemhildstr. 15, 44793 Bochum
- problem using call-process with grep, Drew Adams, 2005/12/23
- Re: problem using call-process with grep, Richard M. Stallman, 2005/12/23
- RE: problem using call-process with grep, Drew Adams, 2005/12/23
- Re: problem using call-process with grep, Kevin Rodgers, 2005/12/23
- RE: problem using call-process with grep, Drew Adams, 2005/12/23
- Re: problem using call-process with grep, David Kastrup, 2005/12/23
- RE: problem using call-process with grep, Drew Adams, 2005/12/23
- Re: problem using call-process with grep,
David Kastrup <=
- RE: problem using call-process with grep, Drew Adams, 2005/12/23
- Re: problem using call-process with grep, David Kastrup, 2005/12/23
- RE: problem using call-process with grep, Drew Adams, 2005/12/23
- Re: problem using call-process with grep, Giorgos Keramidas, 2005/12/23
- Re: problem using call-process with grep, Richard M. Stallman, 2005/12/24
- RE: problem using call-process with grep, Drew Adams, 2005/12/24
- Re: problem using call-process with grep, Eli Zaretskii, 2005/12/24
- RE: problem using call-process with grep, Drew Adams, 2005/12/24
- Re: problem using call-process with grep, Eli Zaretskii, 2005/12/24