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3.1 Copy-out mode

In copy-out mode, cpio copies files into an archive. It reads a list of filenames, one per line, on the standard input, and writes the archive onto the standard output. A typical way to generate the list of filenames is with the find command; you should give find the ‘-depth’ option to minimize problems with permissions on directories that are unreadable.

Copy-out mode is requested by the ‘-o’ (‘--create’) command line option, e.g.:

% find | cpio -o > directory.cpio

The following options can be used in copy-out mode:

-0
--null

Filenames in the list are delimited by ASCII null characters instead of newlines.

-A
--append

Append to an existing archive.

-a
--reset-access-time

Reset the access times of files after reading them.

--absolute-filenames

Do not strip file system prefix components from the file names. This is the default.

--no-absolute-filenames

Strip file system prefix components from the file names before storing them to the archive.

--block-size=block-size

Sets the I/O block size to block-size * 512 bytes.

-B

Set the I/O block size to 5120 bytes.

-c

Use the old portable (ASCII) archive format.

-C number
--io-size=number

Set the I/O block size to the given number of bytes.

-D dir
--directory=dir

Change to directory dir

--force-local

Treat the archive file as local, even if its name contains colons.

-F [[user@]host:]archive-file
-O [[user@]host:]archive-file
--file=[[user@]host:]archive-file

Use the supplied archive-file instead of standard input. Optional user and host specify the user and host names in case of a remote archive.

-H format
--format=format

Use given archive format. See format, for a list of available formats.

-L
--dereference

Dereference symbolic links (copy the files that they point to instead of copying the links).

-M string
--message=string

Print string when the end of a volume of the backup media is reached.

--quiet

Do not print the number of blocks copied.

--rsh-command=command

Use command instead of rsh to access remote archives.

-R
--owner=[user][:.][group]

Set the ownership of all files created to the specified user and/or group. See owner.

-v
--verbose

Verbosely list the files processed.

-V
--dot

Print a ‘.’ for each file processed.

-W
--warning=flag

Control warning display. Argument is one of ‘none’, ‘truncate’, ‘no-truncate’ or ‘all’. See warning, for a detailed discussion of these.


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