CPIO(1)                    OpenBSD Reference 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.

     The options are as follows:

     -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 have 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 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      Create any intermediate directories as needed during re-
                     store.

             -E file
                     Read list of file name patterns to extract or list from
                     file.

             -f      Restore all files except those matching the patterns giv-
                     en 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 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 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 direc-
                     tories will be created.

             -u      Overwrite files even when the file in the archive is old-
                     er 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 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      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.

ERRORS
     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.

ENVIRONMENT
     TMPDIR      Path in which to store temporary files.

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.

OpenBSD 3.0                    February 16, 1997                             3
