Mac OS X / Darwin man pages : cpio (1)
cpio (1)
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cpio - copy file archives in and out
cpio -o [-aABcLvzZ] [-C bytes] [-F archive] [-H format] [-O archive] <
name-list [> archive]
cpio -i [-bBcdfmrsStuvzZ6] [-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 following options are supported:
- -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
- Reset the access times on files that has been
copied to the archive.
- -A
- Append to the specified archive.
- -B
- Set block size of output to 5120 bytes.
- -c
- Use ASCII format for cpio header for portability.
- -C bytes
- Set the block size of output to bytes.
- -F archive
-
- -O archive
- Use the specified file name as the archive to
write to.
- -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.
- -L
- Follow symbolic links.
- -v
- Be verbose about operations. List filenames as
they are written to the archive.
- -z
- Compress archive using gzip(1)
format.
- -Z
- Compress archive using compress(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.
- -b
- Do byte- and word swapping after reading in data
from the archive, for restoring archives created
on systems with different byte order.
- -B
- Set the block size of the archive being read to
5120 bytes.
- -c
- Expect the archive headers to be in ASCII format.
- -C bytes
- Read archive written with a blocksize of bytes.
- -d
- Create any intermediate directories as needed
during restore.
- -E file
- Read list of file name patters to extract or list
from file.
- -f
- Restore all files except those matching the
patterns given on the command line.
- -F archive
-
- -I archive
- Use the specified file as the input for the
archive.
- -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.
- -m
- Restore modification times on files.
- -r
- Rename restored files interactively.
- -s
- Swap bytes after reading data from the archive.
- -S
- Swap words 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 gzip(1)
format.
- -Z
- Uncompress archive using compress(1)
format.
- -6
- Process old-style cpio format archives.
- -p
- Copy files from one location to another in a single pass.
The list of files to copy are read from standard in and written
out to a directory relative to the specified directory
argument.
- -a
- Reset the access times on files that has been
copied.
- -d
- Create any intermediate directories as needed to
write the files at the new location.
- -l
- When possible, link files rather than creating an
extra copy.
- -L
- Follow symbolic links.
- -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.
cpio will exit with one of the following values:
- 0
- All files were processed successfully.
- 1
- An error occured.
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
options 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.
pax(1)
, tar(1)
The -s and -S options are currently not implemented.
Keith Muller at the University of California, San Diego
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