cpio — copy file
archives in and out
cpio |
-o [-AaBcjLvZz]
[-C bytes]
[-F archive]
[-H format]
[-O archive]
< name-list [>
archive] |
cpio |
-i [-6BbcdfjmrSstuvZz]
[-C bytes]
[-E file]
[-F archive]
[-H format]
[-I archive]
[pattern ...] [<
archive] |
cpio |
-p [-adLlmuv]
destination-directory <
name-list |
The cpio command copies files to and from
a cpio archive.
The options are as follows:
-o- Create an archive. Reads the list of files to store in the archive from
standard input, and writes the archive on standard output.
-A- Append to the specified archive.
-a- Reset the access times on files that have been copied to the
archive.
-B- Set block size of output to 5120 bytes.
-C
bytes- Set the block size of output to bytes.
-c- Use ASCII format for
cpio header for
portability.
-F
archive- Use the specified file as the input for the archive.
-H
format- Write the archive in the specified format. Recognized formats are:
- bcpio
- Old binary
cpio format.
- cpio
- Old octal character
cpio format.
- sv4cpio
- SVR4 hex
cpio format.
- tar
- Old tar format.
- ustar
- POSIX ustar format.
-j- Compress archive using the bzip2 format. The bzip2 utility must be
installed separately.
-L- Follow symbolic links.
-O
archive- Use the specified file name as the archive to write to.
-v- Be verbose about operations. List filenames as they are written to the
archive.
-Z- Compress archive using
compress(1)
format.
-z- Compress archive using
gzip(1) format.
-i- Restore files from an archive. Reads the archive file from standard input
and extracts files matching the patterns that were
specified on the command line.
-6- Process old-style
cpio format archives.
-B- Set the block size of the archive being read to 5120 bytes.
-b- Do byte and word swapping after reading in data from the archive, for
restoring archives created on systems with a different byte
order.
-C
bytes- Read archive written with a block size of
bytes.
-c- Expect the archive headers to be in ASCII format.
-d- Create any intermediate directories as needed during restore.
-E
file- Read list of file name patterns to extract or list from
file.
-F
archive, -I
archive- Use the specified file as the input for the archive.
-f- Restore all files except those matching the
patterns given on the command line.
-H
format- Read an archive of the specified format. Recognized formats are:
- bcpio
- Old binary
cpio format.
- cpio
- Old octal character
cpio format.
- sv4cpio
- SVR4 hex
cpio format.
- tar
- Old tar format.
- ustar
- POSIX ustar format.
-j- Uncompress archive using the bzip2 format. The bzip2 utility must be
installed separately.
-m- Restore modification times on files.
-r- Rename restored files interactively.
-S- Swap words after reading data from the archive.
-s- Swap bytes after reading data from the archive.
-t- Only list the contents of the archive, no files or directories will be
created.
-u- Overwrite files even when the file in the archive is older than the
one that will be overwritten.
-v- Be verbose about operations. List filenames as they are copied in from
the archive.
-Z- Uncompress archive using
compress(1)
format.
-z- Uncompress archive using
gzip(1) format.
-p- Copy files from one location to another in a single pass. The list of
files to copy are read from standard input and written out to a directory
relative to the specified directory argument.
-a- Reset the access times on files that have been copied.
-d- Create any intermediate directories as needed to write the files at
the new location.
-L- Follow symbolic links.
-l- When possible, link files rather than creating an extra copy.
-m- Restore modification times on files.
-u- Overwrite files even when the original file being copied is older than
the one that will be overwritten.
-v- Be verbose about operations. List filenames as they are copied.
TMPDIR- Path in which to store temporary files.
The cpio utility exits with one of the
following values:
- 0
- All files were processed successfully.
- 1
- An error occurred.
Whenever cpio cannot create a file or a
link when extracting an archive or cannot find a file while writing an
archive, or cannot preserve the user ID, group ID, file mode, or access and
modification times when the -p option is specified,
a diagnostic message is written to standard error and a non-zero exit value
will be returned, but processing will continue. In the case where
cpio cannot create a link to a file,
cpio will not create a second copy of the file.
If the extraction of a file from an archive is prematurely
terminated by a signal or error, cpio may have only
partially extracted the file the user wanted. Additionally, the file modes
of extracted files and directories may have incorrect file bits, and the
modification and access times may be wrong.
If the creation of an archive is prematurely terminated by a
signal or error, cpio may have only partially
created the archive, which may violate the specific archive format
specification.
Keith Muller at the University of
California, San Diego.
Different file formats have different maximum file sizes. It is
recommended that a format such as cpio or ustar be used for larger
files.
The -s and -S
options are currently not implemented.