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
[-6BbcdfmrSstuvZz]
[-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
archive 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
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
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 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
-
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
directories 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 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.
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.