DD(1)			 HP-UX 5.0			 DD(1)

     NAME
	  dd - convert, reblock, translate, and copy a (tape) file

     SYNOPSIS
	  dd [option=value] ...

     HP-UX COMPATIBILITY
	  Level:
	       HP-UX/STANDARD

	  Origin:
	       System V

     DESCRIPTION
	  Dd copies the specified input file to the  specified	output
	  with	possible  conversions.	 The standard input and output
	  are used by default.	The input and output block size may be
	  specified to take advantage of raw physical I/O.

	  option	  values
	  if=file	  input file name; standard input is default
	  of=file	  output file name; standard output is default
	  ibs=n		  input block size n bytes (default 512)
	  obs=n		  output block size (default 512)
	  bs=n		  set  both  input  and	 output	 block	 size,
			  superseding	ibs   and  obs;	 also,	if  no
			  conversion is specified, it is  particularly
			  efficient since no in-core copy need be done
	  cbs=n		  conversion buffer size
	  skip=n	  skip n input blocks before starting copy
	  seek=n	  seek n blocks from beginning of output  file
			  before copying
	  count=n	  copy only n input blocks
	  conv=ascii	  convert EBCDIC to ASCII
	       ebcdic	  convert ASCII to EBCDIC
	       ibm	  slightly different map of ASCII to EBCDIC
	       lcase	  map alphabetics to lower case
	       ucase	  map alphabetics to upper case
	       swab	  swap every pair of bytes
	       noerror	  do not stop processing on an error
	       sync	  pad every input block to ibs
	       ... , ...  several comma-separated conversions

	  Where sizes are specified, a number of bytes is expected.  A
	  number  may end with k, b, or w to specify multiplication by
	  1024, 512, or 2, respectively; a  pair  of  numbers  may  be
	  separated by x to indicate a product.

	  Cbs is used only if ascii or ebcdic conversion is specified.
	  In  the  former  case	 cbs  characters  are  placed into the
	  conversion buffer, converted to ASCII, and  trailing	blanks
	  are  trimmed and a new-line is added before sending the line
	  to the output.  In the latter case ASCII characters are read
	  into	the conversion buffer, converted to EBCDIC, and blanks
	  added to make up an output block of size cbs.

	  After completion, dd reports the number of whole and partial
	  input and output blocks.

     EXAMPLE
	  This command will read an EBCDIC tape	 blocked  ten  80-byte
	  EBCDIC card images per block into the ASCII file x:

	       dd  if=/dev/rmt/0m  of=x	 ibs=800  cbs=80  conv=ascii,lcase

	  Note the use of raw magtape.	Dd is especially suited to I/O
	  on  the  raw	physical devices because it allows reading and
	  writing in arbitrary block sizes.

     SEE ALSO
	  cp(1), tr(1).

     DIAGNOSTICS
	  f+p blocks  in(out)  numbers	of  full  and  partial	blocks
	  read(written)

     WARNING
	  You may experience trouble writing directly  to  or  reading
	  directly  from  a  cartridge	tape.	For  best results, use
	  tcio(1) as an input or output filter.	 For example, use

	       ... | dd ... | tcio -ovVS 256 /dev/rct

	  for output to a cartridge tape, and

	       tcio -ivS 256 /dev/rct | dd ... | ...

	  for input from a cartridge tape.

     BUGS
	  The ASCII/EBCDIC conversion tables are taken from  the  256-
	  character   standard	 in  the  CACM	Nov,  1968.   The  ibm
	  conversion,  while  less  widely  accepted  as  a  standard,
	  corresponds  better  to certain IBM print train conventions.
	  There is no universal solution.

	  New-lines are inserted only on conversion to ASCII;  padding
	  is  done  only  on  conversion  to  EBCDIC.  These should be
	  separate options.