How to make a lisp function use an outside executable such as a compiled C program?

How to make a lisp function use an outside executable such as a compiled C program?

[gnuist007]

I asked this question in a 2002 post in the thread describing it and
previous response.

https://groups.google.com/group/gnu.emacs.help/browse_thread/thread/a556b6d959c4a84d/

Has there been any improvements in the last 10 years?

Gnuist

RE: How to make a lisp function use an outside executable such as acompiled C program?

[Drew Adams]

> I asked this question in a 2002 post in the thread describing it and
> previous response.
> 
> https://groups.google.com/group/gnu.emacs.help/browse_thread/t
> hread/a556b6d959c4a84d/
> 
> Has there been any improvements in the last 10 years?

Barry Margolin already gave you the answer, at the URL you cite.
Did you try it in the last 10 years? ;-)

For more info, see the Elisp manual, nodes `Synchronous Processes' and
`Asynchronous Processes'.

Re: How to make a lisp function use an outside executable such as a compiled C program?

[Raymond Wiker]

gnuist007@hotmail.com writes:

> I asked this question in a 2002 post in the thread describing it and
> previous response.
>
> https://groups.google.com/group/gnu.emacs.help/browse_thread/thread/a556b6d959c4a84d/
>
> Has there been any improvements in the last 10 years?

Apparently not... your question is still as ill-specified as it was 10
years ago.

Re: How to make a lisp function use an outside executable such as a compiled C program?

[Aurélien Aptel]

On Wed, Oct 24, 2012 at 8:02 PM,  <gnuist007@hotmail.com> wrote:
>
> I asked this question in a 2002 post in the thread describing it and
> previous response.

You have to write some emacs lisp.
As someone already said, use call-process.

This calls synchronously ls with the -l and -a options:

(call-process "ls" nil nil nil "-l" "-a")

If you want the return value to be the program output you can use
shell-command-to-string.

You can wrap this line in a function and put it in your .emacs like this:

(defun my-function ()
  (interactive)
  (call-process "ls" nil nil nil "-l" "-a"))

You can then bind it to a key like this (still in .emacs):

(global-set-key (kbd "<f9>")   'my-function)

>
> https://groups.google.com/group/gnu.emacs.help/browse_thread/thread/a556b6d959c4a84d/
>
> Has there been any improvements in the last 10 years?

It's really not difficult, you should read what people say in this thread.
If you have a previous experience in programming and want a short
introduction to emacs lisp I recommend you Xah Lee's tutorials :

http://ergoemacs.org/emacs/elisp.html

Re: How to make a lisp function use an outside executable such as a compiled C program?

[gnuist007]

On Oct 24, 1:29 pm, Aurélien Aptel <aurelien.aptel+em...@gmail.com>
wrote:
> On Wed, Oct 24, 2012 at 8:02 PM,  <gnuist...@hotmail.com> wrote:
>
> > I asked this question in a 2002 post in the thread describing it and
> > previous response.
>
> You have to write some emacs lisp.
> As someone already said, use call-process.
>
> This calls synchronously ls with the -l and -a options:
>
> (call-process "ls" nil nil nil "-l" "-a")
>
> If you want the return value to be the program output you can use
> shell-command-to-string.
>
> You can wrap this line in a function and put it in your .emacs like this:
>
> (defun my-function ()
>   (interactive)
>   (call-process "ls" nil nil nil "-l" "-a"))
>
> You can then bind it to a key like this (still in .emacs):
>
> (global-set-key (kbd "<f9>")   'my-function)
>
>
>
> >https://groups.google.com/group/gnu.emacs.help/browse_thread/thread/a...
>
> > Has there been any improvements in the last 10 years?
>
> It's really not difficult, you should read what people say in this thread.
> If you have a previous experience in programming and want a short
> introduction to emacs lisp I recommend you Xah Lee's tutorials :
>
> http://ergoemacs.org/emacs/elisp.html

Thanks for the great reply. Your illustrative example was the thing in
need.

How to make a lisp function use an outside executable such as a compiled C program?

[gnuist]

How to make a lisp function use an outside executable such as a compiled C program?


How to write a lisp script? common lisp script? emacs lisp script?

Re: How to make a lisp function use an outside executable such as a compiled C program?

[Barry Margolin]

In article <9e8ebeb2.0210030430.75338b18@posting.google.com>,
gnuist <gnuist007@hotmail.com> wrote:
>How to make a lisp function use an outside executable such as a compiled
>C program?

Use the call-process function.

-- 
Barry Margolin, barmar@genuity.net
Genuity, Woburn, MA
*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.
Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.