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    <p><strong>Late edit</strong>: As much as I appreciate the upvotes, Jurta's answer is the way to go. And Greg's hack is neater than mine.</p> <p>I'll leave the rest of this here because it might be worth something, but...</p> <hr> <p><strong><code>M-x shell-command-on-region</code></strong>, which appears to be bound to <strong><code>M-|</code></strong> by default.</p> <hr> <p>I see that this does not do exactly what Rohit asked for. Using <code>C-h f shell-command-on-region</code> reveals that the desired behavior is available in the non-interactive version of the command (by setting the argument <code>replace</code> to non-nil). We should be able to write a wrapper to do this. </p> <p>Try this (load it into <code>*scratch*</code> and run <code>M-x eval-buffer</code>, if it works, copy it to your .emacs file):</p> <pre><code>(defun shell-command-on-region-replace (start end command) "Run shell-command-on-region interactivly replacing the region in place" (interactive (let (string) (unless (mark) (error "The mark is not set now, so there is no region")) ;; Do this before calling region-beginning ;; and region-end, in case subprocess output ;; relocates them while we are in the minibuffer. ;; call-interactively recognizes region-beginning and ;; region-end specially, leaving them in the history. (setq string (read-from-minibuffer "Shell command on region: " nil nil nil 'shell-command-history)) (list (region-beginning) (region-end) string))) (shell-command-on-region start end command t t) ) </code></pre> <p>And note as I say in the comments that this is not a very emacsy thing to do. But I think it works.</p> <hr> <p>For any readers who don't know how to select a region:</p> <ol> <li>Move the "point" (current cursor position) to one end of the region, and use <code>C-space</code> to activate the "mark"</li> <li>Move the point to the other end of the region</li> <li>Your done, invoke the command</li> </ol>
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    1. POFiltering text through a shell command in Emacs
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    1. COThank you, I know of that, but it gives me the filtered text in a separate buffer; it doesn't replace the original.
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    2. COI know the vi behavior you want. Still looking.
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    3. COInteresting that this is not simply a FAQ. I use this functionality in vi (or vim) all the time; an editor without it becomes ... less interesting.
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      1. USJonathan Leffler
 

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