bugGNU Core Utilities - Bugs: bug #26580, Feature request - cp - when using...


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bug #26580: Feature request - cp - when using update also check size

Submitter:  Harm van Tilborg <zeroxcool>
Submitted:  Thu 14 May 2009 07:30:03 PM UTC
Category:  None Severity:  1 - Wish
Item Group:  None Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open

Thu 14 May 2009 09:16:20 PM UTC, comment #1: 

The functionality that you ask for is already available in rsync.  The rsync tool seems to be the perfect fit for the task that you are requesting.  Please give rsync a try.

  rsync -av path1/from path2/

Bob Proulx <rwp>
Project Administrator
Thu 14 May 2009 07:30:03 PM UTC, original submission:  

Hello dear developers,

I'm using `cp -u' to copy one directory to the other, but only updated files (according to the mtime, as specified). That works fine, however, since I'm copying from one partition (say A) to another (say B), I found out that when B was 100% full, `cp' would only make empty files, but set the right file name. (Remark that I am also using the ` --preserve=mode,timestamps' options, so timestamps were successfully set).

Now I know `cp' is not a true backup tool, but would is not be handy to also check for the file size, so that when a file size from A is different from B, a copy is done either way?

This makes it - after freeing some space on B - easy to `restore' all files with a regular `cp -u' run.

Maybe there are counter arguments against this method of checking inconsistencies, let me know.

Kind regards,
Harm van Tilborg

Harm van Tilborg <zeroxcool>


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    Follow 2 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2009-05-14 rwp Severity3 - Normal 1 - Wish
    2009-05-14 zeroxcool Carbon-Copy- Added zeroxcool

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