cpio(1)
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CPIO(1) NetBSD General Commands Manual CPIO(1)
NAME
cpio -- copy file archives in and out
SYNOPSIS
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
DESCRIPTION
The cpio command copies files to and from a cpio archive. If the archive
is of the form: [[user@]host:]file then the archive will be processed
using rmt(8).
The options are as follows:
-o, --create
Create an archive. Reads the list of files to store in the ar-
chive from standard input, and writes the archive on standard
output.
-a, --reset-access-time
Reset the access times on files that have been copied to
the archive.
-A, --append
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, --extract
Restore files from an archive. Reads the archive file from stan-
dard 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 a
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 block size of bytes.
-d, --make-directories
Create any intermediate directories as needed during
restore.
-E file, --pattern-file file
Read list of file name patterns to extract or list from
file.
-f, --nonmatching
Restore all files except those matching the patterns
given on the command line.
-F archive, --file archive
-I archive
Use the specified file as the input for the archive.
-H format, --format format
Read an archive of the specified format. Recognized for-
mats 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
Rename restored files interactively.
-s Swap bytes after reading data from the archive.
-S, --swap-halfwords
Swap words after reading data from the archive.
-t, --list
Only list the contents of the archive, no files or direc-
tories will be created.
-u, --unconditional
Overwrite files even when the file in the archive is
older than the one that will be overwritten.
-v, --verbose
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, --pass-through
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, --link
When possible, link files rather than creating an extra
copy.
-L, --dereference
Follow symbolic links.
-m, --preserve-modification-time
Restore modification times on files.
-u, --unconditional
Overwrite files even when the original file being copied
is older than the one that will be overwritten.
-v, --verbose
Be verbose about operations. List filenames as they are
copied.
--force-local
Do not interpret filenames that contain a `:' as remote
files.
--insecure
Normally cpio ignores filenames that contain `..' as a
path component. With this option, files that contain `..'
can be processed.
EXIT STATUS
cpio will exit 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 cre-
ate 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 direc-
tories 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.
SEE ALSO
pax(1), tar(1)
AUTHORS
Keith Muller at the University of California, San Diego.
BUGS
The -s and -S options are currently not implemented.
NetBSD 4.0 February 13, 2004 NetBSD 4.0
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