Re: sed --in-place bug (updates mtime of file even if no changes are made)
Eric Blake <[email protected]>
| Newsgroups | gmane.comp.gnu.utils.bugs |
|---|---|
| Organization | Red Hat |
| Message-ID | <[email protected]> |
On 11/08/2011 02:32 PM, John Vanderpool wrote: > --in-place shouldn't update the mtime of the file if the pattern doesn't > match > (i.e. no changes were made to file) Why not? Conceptually, 'sed --in-place' is short-hand for 'sed > temp, mv temp original', since it is not possible to known a priori whether the sed script will modify the input when generating the temporary file. You're welcome to submit a patch if you think you can fix it, but right now, I don't think sed should have to recognize whether the output is identical to the input. If you need mtime unchanged, then use sed to a temporary file yourself, and compare the two files before deciding whether to move the temporary file or keep the original. -- Eric Blake [email protected] +1-801-349-2682 Libvirt virtualization library http://libvirt.org
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