GNU Info
(cpio.info)Options
Options
=======
`-0, --null'
Read a list of filenames terminated by a null character, instead
of a newline, so that files whose names contain newlines can be
archived. GNU find is one way to produce a list of
null-terminated filenames. This option may be used in copy-out
and copy-pass modes.
`-a, --reset-access-time'
Reset the access times of files after reading them, so that it
does not look like they have just been read.
`-A, --append'
Append to an existing archive. Only works in copy-out mode. The
archive must be a disk file specified with the -O or -F (-file)
option.
`-b, --swap'
Swap both halfwords of words and bytes of halfwords in the data.
Equivalent to -sS. This option may be used in copy-in mode. Use
this option to convert 32-bit integers between big-endian and
little-endian machines.
`-B'
Set the I/O block size to 5120 bytes. Initially the block size is
512 bytes.
`--block-size=BLOCK-SIZE'
Set the I/O block size to BLOCK-SIZE * 512 bytes.
`-c'
Use the old portable (ASCII) archive format.
`-C IO-SIZE, --io-size=IO-SIZE'
Set the I/O block size to IO-SIZE bytes.
`-d, --make-directories'
Create leading directories where needed.
`-E FILE, --pattern-file=FILE'
Read additional patterns specifying filenames to extract or list
from FILE. The lines of FILE are treated as if they had been
non-option arguments to cpio. This option is used in copy-in mode,
`-f, --nonmatching'
Only copy files that do not match any of the given patterns.
`-F, --file=archive'
Archive filename to use instead of standard input or output. To
use a tape drive on another machine as the archive, use a filename
that starts with `HOSTNAME:'. The hostname can be preceded by a
username and an `@' to access the remote tape drive as that user,
if you have permission to do so (typically an entry in that user's
`~/.rhosts' file).
`--force-local'
With -F, -I, or -O, take the archive file name to be a local file
even if it contains a colon, which would ordinarily indicate a
remote host name.
`-H FORMAT, --format=FORMAT'
Use archive format FORMAT. The valid formats are listed below;
the same names are also recognized in all-caps. The default in
copy-in mode is to automatically detect the archive format, and in
copy-out mode is `bin'.
`bin'
The obsolete binary format.
`odc'
The old (POSIX.1) portable format.
`newc'
The new (SVR4) portable format, which supports file systems
having more than 65536 i-nodes.
`crc'
The new (SVR4) portable format with a checksum added.
`tar'
The old tar format.
`ustar'
The POSIX.1 tar format. Also recognizes GNU tar archives,
which are similar but not identical.
`hpbin'
The obsolete binary format used by HPUX's cpio (which stores
device files differently).
`hpodc'
The portable format used by HPUX's cpio (which stores device
files differently).
`-i, --extract'
Run in copy-in mode. Note: Copy-in mode.
`-I archive'
Archive filename to use instead of standard input. To use a tape
drive on another machine as the archive, use a filename that
starts with `HOSTNAME:'. The hostname can be preceded by a
username and an `@' to access the remote tape drive as that user,
if you have permission to do so (typically an entry in that user's
`~/.rhosts' file).
`-k'
Ignored; for compatibility with other versions of cpio.
`-l, --link'
Link files instead of copying them, when possible.
`-L, --dereference'
Copy the file that a symbolic link points to, rather than the
symbolic link itself.
`-m, --preserve-modification-time'
Retain previous file modification times when creating files.
`-M MESSAGE, --message=MESSAGE'
Print MESSAGE when the end of a volume of the backup media (such
as a tape or a floppy disk) is reached, to prompt the user to
insert a new volume. If MESSAGE contains the string "%d", it is
replaced by the current volume number (starting at 1).
`-n, --numeric-uid-gid'
Show numeric UID and GID instead of translating them into names
when using the `--verbose option'.
`--no-absolute-filenames'
Create all files relative to the current directory in copy-in
mode, even if they have an absolute file name in the archive.
`--no-preserve-owner'
Do not change the ownership of the files; leave them owned by the
user extracting them. This is the default for non-root users, so
that users on System V don't inadvertantly give away files. This
option can be used in copy-in mode and copy-pass mode
`-o, --create'
Run in copy-out mode. Note: Copy-out mode.
`-O archive'
Archive filename to use instead of standard output. To use a tape
drive on another machine as the archive, use a filename that
starts with `HOSTNAME:'. The hostname can be preceded by a
username and an `@' to access the remote tape drive as that user,
if you have permission to do so (typically an entry in that user's
`~/.rhosts' file).
`--only-verify-crc'
Verify the CRC's of each file in the archive, when reading a CRC
format archive. Don't actually extract the files.
`-p, --pass-through'
Run in copy-pass mode. Note: Copy-pass mode.
`--quiet'
Do not print the number of blocks copied.
`-r, --rename'
Interactively rename files.
`-R [user][:.][group], --owner [user][:.][group]'
Set the ownership of all files created to the specified user and/or
group in copy-out and copy-pass modes. Either the user, the
group, or both, must be present. If the group is omitted but the
":" or "." separator is given, use the given user's login group.
Only the super-user can change files' ownership.
`--rsh-command=COMMAND'
Notifies cpio that is should use COMMAND to communicate with remote
devices.
`-s, --swap-bytes'
Swap the bytes of each halfword (pair of bytes) in the files.This
option can be used in copy-in mode.
`-S, --swap-halfwords'
Swap the halfwords of each word (4 bytes) in the files. This
option may be used in copy-in mode.
`--sparse'
Write files with large blocks of zeros as sparse files. This
option is used in copy-in and copy-pass modes.
`-t, --list'
Print a table of contents of the input.
`-u, --unconditional'
Replace all files, without asking whether to replace existing
newer files with older files.
`-v, --verbose'
List the files processed, or with `-t', give an `ls -l' style
table of contents listing. In a verbose table of contents of a
ustar archive, user and group names in the archive that do not
exist on the local system are replaced by the names that
correspond locally to the numeric UID and GID stored in the
archive.
`-V --dot'
Print a `.' for each file processed.
`--version'
Print the cpio program version number and exit.
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