cpio(1)



CPIO(1)                            GNU CPIO                            CPIO(1)

NAME
       cpio - copy files to and from archives

SYNOPSIS
       cpio  {-o|--create} [-0acvABLV] [-C BYTES] [-H FORMAT] [-M MESSAGE] [-O
       [[USER@]HOST:]ARCHIVE]            [-F            [[USER@]HOST:]ARCHIVE]
       [--file=[[USER@]HOST:]ARCHIVE]   [--format=FORMAT]  [--message=MESSAGE]
       [--null]   [--reset-access-time]   [--verbose]    [--dot]    [--append]
       [--block-size=blocks]   [--dereference]   [--io-size=BYTES]   [--quiet]
       [--force-local] [--rsh-command=COMMAND] < name-list [> archive]

       cpio {-i|--extract} [-bcdfmnrtsuvBSV] [-C BYTES] [-E FILE] [-H  FORMAT]
       [-M  MESSAGE]  [-R  [USER][:.][GROUP]]  [-I  [[USER@]HOST:]ARCHIVE] [-F
       [[USER@]HOST:]ARCHIVE] [--file=[[USER@]HOST:]ARCHIVE]  [--make-directo-
       ries]           [--nonmatching]          [--preserve-modification-time]
       [--numeric-uid-gid] [--rename] [--list] [--swap-bytes] [--swap] [--dot]
       [--unconditional]  [--verbose] [--block-size=BLOCKS] [--swap-halfwords]
       [--io-size=BYTES]        [--pattern-file=FILE]        [--format=FORMAT]
       [--owner=[USER][:.][GROUP]]  [--no-preserve-owner]  [--message=MESSAGE]
       [--force-local]   [--no-absolute-filenames]   [--sparse]   [--only-ver-
       ify-crc]      [--to-stdout]      [--quiet]      [--rsh-command=COMMAND]
       [--extract-over-symlinks] [pattern...] [< archive]

       cpio {-p|--pass-through} [-0adlmuvLV] [-R  [USER][:.][GROUP]]  [--null]
       [--reset-access-time]  [--make-directories]  [--link] [--quiet] [--pre-
       serve-modification-time]    [--unconditional]    [--verbose]    [--dot]
       [--dereference]    [--owner=[USER][:.][GROUP]]    [--no-preserve-owner]
       [--sparse] destination-directory < name-list

       cpio {-?|--help|--usage|--version}

REPORTING BUGS
       Report cpio bugs to bug-cpio@gnu.org

       GNU cpio home page: <http://www.gnu.org/software/cpio/>

       General help using GNU software: <http://www.gnu.org/gethelp/>

       Report cpio translation bugs to <http://translationproject.org/team/>

SEE ALSO
       cpio(5)

DESCRIPTION
       GNU cpio copies files between archives and  directories.   It  supports
       the following archive formats: old binary cpio, old portable cpio, SVR4
       cpio with and without checksum, HP cpio, and various tar formats.

       The operation mode is requested by one of the following options:

       -o, --create
              Copy-out.  Read a list of file names from the standard input and
              create  on  the standard output (unless overridden by the --file
              option) an archive containing these files.

       -i, --extract
              Copy-in.  Read the archive from standard input (or from the file
              supplied  with  the --file option) and extract files from it, or
              (if the -t option is given) list its contents  to  the  standard
              output.  If one or more patterns are supplied, read or list only
              files matching these patterns.  The -t option alone implies -i.

       -p, --pass-through
              Pass-through.  Read a list of file names from the standard input
              and copy them to the specified directory.

       -?, --help
              Give a short help summary and exit.

       --usage
              Print a short usage message and exit.

       --version
              Print program version and exit.

REPORTING BUGS
       Report cpio bugs to bug-cpio@gnu.org

       GNU cpio home page: <http://www.gnu.org/software/cpio/>

       General help using GNU software: <http://www.gnu.org/gethelp/>

       Report cpio translation bugs to <http://translationproject.org/team/>

OPTIONS
   Operation modifiers valid in any mode
       --block-size=BLOCK-SIZE
              Set the I/O block size to BLOCK-SIZE * 512 bytes.

       -B     Set the I/O block size to 5120 bytes.

       -c     Use  the  old portable (ASCII) archive format.  This is the same
              as -H odc.

       -C, --io-size=NUMBER
              Set the I/O block size to the given NUMBER of bytes.

       -D, --directory=DIR
              Change to directory DIR.

       --force-local
              Archive file is local, even if its name contains colons.

       -H, --format=FORMAT
              Use given archive FORMAT.  Valid  formats  are  (the  number  in
              parentheses gives maximum size for individual archive member):

              bin    The obsolete binary format.  (2147483647 bytes)

              odc    The old (POSIX.1) portable format. (8589934591 bytes)

              newc   The  new (SVR4) portable format, which supports file sys-
                     tems having more than 65536 i-nodes. (4294967295 bytes)

              crc    The new (SVR4) portable format with a checksum added.

              tar    The old tar format. (8589934591 bytes)

              ustar  The POSIX.1 tar format.   Also  recognizes  GNU  tar  ar-
                     chives,  which are similar but not identical. (8589934591
                     bytes)

              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).

       -R, --owner=[USER][:.][GROUP]
              In copy-in and copy-pass mode, set the ownership  of  all  files
              created  to  the specified USER and/or GROUP.  In copy-out mode,
              store the supplied owner information in the archive.

              USER and GROUP are first looked up in the system user and  group
              databases.  If not found, cpio checks if they consist of decimal
              digits only and, if so, treats them as numeric UID and GID, cor-
              respondingly.

              To  avoid  the  lookup  and ensure that arguments are treated as
              numeric values, prefix them with a plus sign, e.g.: -R +0:+0.

       --quiet
              Do not print the number of blocks copied at the end of the run.

       --rsh-command=COMMAND
              Use remote COMMAND instead of rsh.

       -v, --verbose
              Verbosely list the files processed.

       -V, --dot
              Print a "." for each file processed.

       -W, --warning=FLAG
              Controls warning display.  The FLAG is one of none,  to  disable
              all  warnings,  all to enable them, truncate, to enable warnings
              about field truncation, and no-truncate, to disable them.

              Multiple -W options accumulate.

   Operation modifiers valid in copy-in and copy-out modes
       -F, --file=[[USER@]HOST:]ARCHIVE-FILE
              Use this ARCHIVE-FILE instead  of  standard  input  (in  copy-in
              mode)  or standard output (in copy-out mode).  Optional USER and
              HOST specify the user and host names in case  of  a  remote  ar-
              chive.

       -M, --message=STRING
              Print  STRING  when  the  end of a volume of the backup media is
              reached.

   Operation modifiers valid only in copy-in mode
       -b, --swap
              Swap both halfwords of words and bytes of halfwords in the data.
              Equivalent to -sS.

       -f, --nonmatching
              Only copy files that do not match any of the given patterns.

       -n, --numeric-uid-gid
              In  the  verbose table of contents listing, show numeric UID and
              GID.

       -r, --rename
              Interactively rename files.

       -s, --swap-bytes
              Swap the bytes of each halfword in the files.

       -S, --swap-halfwords
              Swap the halfwords of each word (4 bytes) in the files.

       --to-stdout
              Extract files to standard output.

       -E, --pattern-file=FILE
              Read additional patterns specifying filenames to extract or list
              from FILE.

       --only-verify-crc
              When reading a CRC format archive, only verify the CRC's of each
              file in the archive, without actually extracting the files.

   Operation modifiers valid only in copy-out mode
       -A, --append
              Append to an existing archive.

       --device-independent, --reproducible
              Create   reproducible   archives.    This   is   equivalent   to
              --ignore-devno --renumber-inodes.

       --ignore-devno
              Store  0  in  the  device  number  field of each archive member,
              instead of the actual device number.

       -O [[USER@]HOST:]ARCHIVE-NAME
              Use ARCHIVE-NAME instead of standard output. Optional  USER  and
              HOST  specify  the  user  and host names in case of a remote ar-
              chive.

              The output archive name  can  be  specified  wither  using  this
              option, or using -F (--file), but not both.

       --renumber-inodes
              Renumber inodes when storing them in the archive.

   Operation modifiers valid only in copy-pass mode
       -l, --link
              Link files instead of copying them, when possible.

   Operation modifiers valid in copy-in and copy-out modes
       --absolute-filenames
              Do not strip file system prefix components from the file names.

       --no-absolute-filenames
              Create all files relative to the current directory.

   Operation modifiers valid in copy-out and copy-pass modes
       -0, --null
              Filenames  in  the list are delimited by null characters instead
              of newlines.

       -a, --reset-access-time
              Reset the access times of files after reading them.

       -I [[USER@]HOST:]ARCHIVE-NAME
              Use ARCHIVE-NAME instead of standard input.  Optional  USER  and
              HOST  specify  the  user  and host names in case of a remote ar-
              chive.

              The input archive  name  can  be  specified  wither  using  this
              option, or using -F (--file), but not both.

       -L, --dereference
              Dereference  symbolic  links  (copy the files that they point to
              instead of copying the links).

   Operation modifiers valid in copy-in and copy-pass modes
       -d, --make-directories
              Create leading directories where needed.

       -m, --preserve-modification-time
              Retain previous file modification times when creating files.

       --no-preserve-owner
              Do not change the ownership of the files.

       --sparse
              Write files with large blocks of zeros as sparse files.

       -u, --unconditional
              Replace all files unconditionally.

RETURN VALUE
       GNU cpio exits with code 0 if it was able to successfully complete  the
       requested operation.  On errors, it exits with code 2.

SEE ALSO
       tar(1), rmt(8), mt(1).

BUG REPORTS
       Report bugs to <bug-cpio@gnu.org>.

COPYRIGHT
       Copyright (C) 2014 Free Software Foundation, Inc.
       License GPLv3+: GNU GPL version 3 or later
       <http://gnu.org/licenses/gpl.html>
       This is free software: you are free  to  change  and  redistribute  it.
       There is NO WARRANTY, to the extent permitted by law.

CPIO                           December 1, 2014                        CPIO(1)

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