what to see what cpio would do without writing

Posted on 2012-12-24
Medium Priority
Last Modified: 2012-12-31
I have two similar directories and I want to compare them to see what would be copied.

Normall I would cd to a dir and then just run the command:

find . -print | cpio -pdvm /foo/bar

but I cannot recall and worse find in the man to set cpio to read-only -- meaning just show me what it would have done. My memory tells me that I used to be able to do this. But I might have dreamt it since I cannot recall the last time I actually used that option.

The OS today is OS X 10.8.2
Question by:bs98909
LVL 82

Assisted Solution

arnold earned 200 total points
ID: 38718589
I do not believe cpio has a no-action mode.

You might be thinking of diff

Diff -BruN directory_origin directory_destination
The output will be a what changes need to be made to the origin directory contents to make it identical to the destination one.
Files should be regular files.

If you run the cpio you included, you will output the list of files that are copied.
LVL 29

Accepted Solution

MikeOM_DBA earned 400 total points
ID: 38733265
You could also use the "dry run" option of rsync:
rsync -nrv directory_origin directory_destination

Open in new window


Author Closing Comment

ID: 38733589
Sorry for long delay -- holidays got in the way

both the diff and rsync would have worked -- but the rsync is more of what I was looking for

must have dreamt the cpio part

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Attention: This article will no longer be maintained. If you have any questions, please feel free to mail me. jgh@FreeBSD.org Please see http://www.freebsd.org/doc/en_US.ISO8859-1/articles/freebsd-update-server/ for the updated article. It is avail…
I promised to write further about my project, and here I am.  First, I needed to setup the Primary Server.  You can read how in this article: Setup FreeBSD Server with full HDD encryption (http://www.experts-exchange.com/OS/Unix/BSD/FreeBSD/A_3660-S…
Learn how to find files with the shell using the find and locate commands. Use locate to find a needle in a haystack.: With locate, check if the file still exists.: Use find to get the actual location of the file.:
In a previous video, we went over how to export a DynamoDB table into Amazon S3.  In this video, we show how to load the export from S3 into a DynamoDB table.
Suggested Courses

587 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question