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Re: Can I use Emacs as pipe-thru formatter?
From: |
Oliver Scholz |
Subject: |
Re: Can I use Emacs as pipe-thru formatter? |
Date: |
Tue, 05 Aug 2003 18:21:28 +0200 |
User-agent: |
Gnus/5.1002 (Gnus v5.10.2) Emacs/21.3.50 (gnu/linux) |
Barry Margolin <barry.margolin@level3.com> writes:
> Emacs doesn't read and write stdin/stdout, so it can't be used as a filter
> in a pipeline.
Well, indeed you can not get a buffer from stdin (AFAICS). But you do
have some limited options. `print' for example prints to stdout in
batch-mode and `read' reads from stdin.
emacs -q --batch --eval '(print "hello")'
emacs -q --batch --eval '(princ (progn (insert initial-scratch-message)
(buffer-substring (point-min) (point-max))))'
echo "\"lirum larum\"" | emacs -q --batch --eval '(message (read))'
Of course also:
echo '(print "Hello")' | emacs -q --batch --eval '(eval (read))'
There is even some interactivity possible:
emacs -q --batch --eval '(progn (find-file "~/.emacs") (if (y-or-n-p "Shall I
print your .emacs? ") (print (buffer-substring (point-min) (point-max))) (print
"O.k. Bye.")))'
Oliver
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