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Linux 2.6 - man page for dpkg-split (linux section 1)

dpkg-split(1)				  dpkg utilities			    dpkg-split(1)

NAME
       dpkg-split - Debian package archive split/join tool

SYNOPSIS
       dpkg-split [options] command

DESCRIPTION
       dpkg-split  splits  Debian  binary  package  files into smaller parts and reassembles them
       again, to support the storage of large package files on small media such as floppy disks.

       It can be operated manually using the --split, --join and --info options.

       It also has an automatic mode, invoked using the --auto option, where it maintains a queue
       of  parts seen but not yet reassembled and reassembles a package file when it has seen all
       of its parts. The --listq and --discard options allow the management of the queue.

       All splitting, joining and queueing operations produce informative  messages  on  standard
       output; these may safely be ignored.

COMMANDS
       -s, --split complete-archive [prefix]
	      Splits a single Debian binary package into several parts.

	      The  parts are named prefix.NofM.deb where N is the part number, starting at 1, and
	      M is the total number of parts (both in decimal).

	      If no prefix is supplied then the complete-archive  filename  is	taken,	including
	      directory, with any trailing .deb removed.

       -j, --join part...
	      Joins  the  parts  of a package file together, reassembling the original file as it
	      was before it was split.

	      The part files given as arguments must be all the parts of exactly the same  origi-
	      nal binary file. Each part must occur exactly once in the argument list, though the
	      parts to not need to be listed in order.

	      The parts must of course all have been generated with the same part size	specified
	      at  split  time, which means that they must usually have been generated by the same
	      invocation of dpkg-split --split.

	      The parts' filenames are not significant for the reassembly process.

	      By default the output file is called package-version.deb.

       -I, --info part...
	      Prints information, in a human-readable format, about the part  file(s)  specified.
	      Arguments  which	are  not binary package parts produce a message saying so instead
	      (but still on standard output).

       -a, --auto -o complete-output part
	      Automatically queue parts and reassemble a package if possible.

	      The part specified is examined, and compared with other parts of the  same  package
	      (if any) in the queue of packages file parts.

	      If  all  parts  of  the package file of which part is a part are available then the
	      package is reassembled and written to complete-output  (which  should  not  usually
	      already exist, though this is not an error).

	      If not then the part is copied into the queue and complete-output is not created.

	      If part is not a split binary package part then dpkg-split will exit with status 1;
	      if some other trouble occurs then it will exit with status 2.

	      The --output or -o option must be supplied when using --auto.  (If  this	were  not
	      mandatory the calling program would not know what output file to expect.)

       -l, --listq
	      Lists the contents of the queue of packages to be reassembled.

	      For  each package file of which parts are in the queue the output gives the name of
	      the package, the parts in the queue, and the total number of bytes  stored  in  the
	      queue.

       -d, --discard [package...]
	      This  discards  parts  from  the	queue of those waiting for the remaining parts of
	      their packages.

	      If no package is specified then the queue is cleared completely; if any are  speci-
	      fied then only parts of the relevant package(s) are deleted.

       -h, --help
	      Show the usage message and exit.

       --version
	      Show the version and exit.

OPTIONS
       --depotdir directory
	      Specifies  an  alternative  directory  for  the  queue  of parts awaiting automatic
	      reassembly. The default is /var/lib/dpkg.

       -S, --partsize kibibytes
	      Specifies the maximum part size when splitting,  in  kibibytes  (1024  bytes).  The
	      default is 450 KiB.

       -o, --output complete-output
	      Specifies the output file name for a reassembly.

	      This overrides the default for a manual reassembly (--join) and is mandatory for an
	      automatic queue-or-reassemble (--auto).

       -Q, --npquiet
	      When doing automatic queue-or-reassembly dpkg-split usually prints a message if  it
	      is given a part that is not a binary package part. This option suppresses this mes-
	      sage, to allow programs such as dpkg to cope with both split and	unsplit  packages
	      without producing spurious messages.

       --msdos
	      Forces the output filenames generated by --split to be msdos-compatible.

	      This mangles the prefix - either the default derived from the input filename or the
	      one supplied as an argument: alphanumerics are lowercased, plus signs are  replaced
	      by x's and all other characters are discarded.

	      The  result  is  then  truncated as much as is necessary, and filenames of the form
	      prefixNofM.deb are generated.

EXIT STATUS
       An exit status of 0 indicates that the requested split, merge, or other command succeeded.
       --info commands count as successful even if the files are not binary package parts.

       An  exit  status  of  1 occurs only with --auto and indicates that the part file was not a
       binary package part.

       An exit status of 2 indicates some kind of trouble, such as a system call failure, a  file
       that  looked like a package part file but was corrupted, a usage error or some other prob-
       lem.

BUGS
       dpkg-split uses some rather out-of-date conventions for the the filenames of Debian  pack-
       ages.

       Full  details  of the packages in the queue are impossible to get without digging into the
       queue directory yourself.

       There is no easy way to test whether a file that may be a binary package part is one.

       The architecture is not represented in the part files' header, only in the control  infor-
       mation of the contained binary package file, and it is not present in the filenames gener-
       ated.

FILES
       /var/lib/dpkg/parts
	      The default queue directory for part files awaiting automatic reassembly.

	      The filenames used in this directory are in a format internal to dpkg-split and are
	      unlikely to be useful to other programs, and in any case the filename format should
	      not be relied upon.

SEE ALSO
       deb(5), deb-control(5), dpkg-deb(1), dpkg(1).

AUTHOR
       Copyright (C) 1995-1996 Ian Jackson

       This is free software; see the GNU General Public Licence version 2 or later  for  copying
       conditions. There is NO WARRANTY.

Debian Project				    2009-06-26				    dpkg-split(1)


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