topic Re: cpio modified files in Operating System - HP-UX

cpio modified files

Barry Feinberg — Tue, 28 May 2002 17:19:09 GMT

I am using cpio to copy files to a remote server. Is there a way to copy only files that were modified since the last cpio copy? The syntax I am using is.
find /dir -depth | cpio -oc | remsh "cd ; cpio -icduv"

Re: cpio modified files

James R. Ferguson — Tue, 28 May 2002 17:31:24 GMT

Hi Barry:

Create a reference file with 'touch' and use 'find -newer ...'. For example:

# touch -m -t 05012359 /tmp/myref # May 1, 2359 hours.

# find / -newer /tmp/myref ...

Regards!

...JRF...

Re: cpio modified files

Helen French — Tue, 28 May 2002 17:33:39 GMT

Not sure about an option directly with cpio. But you can use lot of options with find command:

-newer
-atime
-mtime
-ctime

# man find - for details

Re: cpio modified files

S.K. Chan — Tue, 28 May 2002 19:34:19 GMT

Just to expand on the "-newer" option. First you create a reference file before you do the first cpio.

# cd /tmp
# touch refA
# (find /dir -xdev|cpio -coax) | remsh venus) "cd /dirA;cpio -icdmuxla"
===>The first cpio, syntax that I normally use ("push method").

For the subsequent cpio you would do ..
# (find /dir -xdev -newer /tmp/refA|cpio -coax) | remsh venus) "cd /dirA;cpio -icdmuxla"

hope it helps ..

Re: cpio modified files

Sanjay_6 — Tue, 28 May 2002 19:44:52 GMT

Hi Barry,

Do not use the -u (unconditional copy) option with the cpio command. This will check the last modified time for the file and will not overwrite the file if the file that exist is of a newer date than the one that was backed up.

Hope this helps.

regds

Re: cpio modified files

Barry Feinberg — Wed, 29 May 2002 11:55:42 GMT

Thanks everybody, I used the find with the newer option to get my script to work.