Provided by: dcfldd_1.3.4.1-2.1_amd64 bug

NAME

       dcfldd - enhanced version of dd for forensics and security

SYNOPSIS

       dcfldd [OPTION]...

DESCRIPTION

       Copy a file, converting and formatting according to the options.

       bs=BYTES
              force ibs=BYTES and obs=BYTES

       cbs=BYTES
              convert BYTES bytes at a time

       conv=KEYWORDS
              convert the file as per the comma separated keyword list

       count=BLOCKS
              copy only BLOCKS input blocks

       ibs=BYTES
              read BYTES bytes at a time

       if=FILE
              read from FILE instead of stdin

       obs=BYTES
              write BYTES bytes at a time

       of=FILE
              write to FILE instead of stdout

              NOTE: of=FILE may be used several times to write

              output to multiple files simultaneously

       of:=COMMAND
              exec and write output to process COMMAND

       seek=BLOCKS
              skip BLOCKS obs-sized blocks at start of output

       skip=BLOCKS
              skip BLOCKS ibs-sized blocks at start of input

       pattern=HEX
              use the specified binary pattern as input

       textpattern=TEXT
              use repeating TEXT as input

       errlog=FILE
              send error messages to FILE as well as stderr

       hashwindow=BYTES
              perform a hash on every BYTES amount of data

       hash=NAME
              either md5, sha1, sha256, sha384 or sha512

              default algorithm is md5. To select multiple algorithms to run simultaneously enter
              the names in a comma separated list

       hashlog=FILE
              send MD5 hash output to FILE instead of stderr

              if you are using multiple hash algorithms you can send  each  to  a  separate  file
              using  the  convention  ALGORITHMlog=FILE, for example md5log=FILE1, sha1log=FILE2,
              etc.

       hashlog:=COMMAND
              exec and write hashlog to process COMMAND

              ALGORITHMlog:=COMMAND also works in the same fashion

       hashconv=[before|after]
              perform the hashing before or after the conversions

       hashformat=FORMAT
              display each hashwindow according to FORMAT

              the hash format mini-language is described below

       totalhashformat=FORMAT
              display the total hash value according to FORMAT

       status=[on|off]
              display a continual status message on stderr

              default state is "on"

       statusinterval=N
              update the status message every N blocks

              default value is 256

       sizeprobe=[if|of]
              determine the size of the input or output file

              for use with status messages.  (this  option  gives  you  a  percentage  indicator)
              WARNING: do not use this option against a

              tape device.

       split=BYTES
              write every BYTES amount of data to a new file

              This operation applies to any of=FILE that follows

       splitformat=TEXT
              the file extension format for split operation.

              you may use any number of 'a' or 'n' in any combo the default format is "nnn" NOTE:
              The split and splitformat options take effect

              only for output files specified AFTER these options appear  in  the  command  line.
              Likewise, you may specify these several times for for different output files within
              the same command line. you may use as many digits  in  any  combination  you  would
              like.  (e.g. "anaannnaana" would be valid, but quite insane)

       vf=FILE
              verify that FILE matches the specified input

       verifylog=FILE
              send verify results to FILE instead of stderr

       verifylog:=COMMAND
              exec and write verify results to process COMMAND

       --help display this help and exit

       --version
              output version information and exit

       The structure of of FORMAT may contain any valid text and special variables.  The built-in
       variables are used the following format: #variable_name# To pass  FORMAT  strings  to  the
       program  from  a  command  line,  it may be necessary to surround your FORMAT strings with
       "quotes."  The built-in variables are listed below:

       window_start
              The beginning byte offset of the hashwindow

       window_end
              The ending byte offset of the hashwindow

       block_start
              The beginning block (by input blocksize) of the window

       block_end
              The ending block (by input blocksize) of the hash window

       hash   The hash value

       algorithm
              The name of the hash algorithm

   For example, the default FORMAT for hashformat and totalhashformat are:
              hashformat="#window_start#   -   #window_end#:    #hash#"    totalhashformat="Total
              (#algorithm#): #hash#"

   The FORMAT structure accepts the following escape codes:
       \n     Newline

       \t     Tab

       \r     Carriage return

       \\     Insert the '\' character

       ##     Insert the '#' character as text, not a variable

       BLOCKS and BYTES may be followed by the following multiplicative suffixes: xM M, c 1, w 2,
       b 512, kD 1000, k 1024, MD 1,000,000, M 1,048,576, GD 1,000,000,000, G 1,073,741,824,  and
       so on for T, P, E, Z, Y.  Each KEYWORD may be:

       ascii  from EBCDIC to ASCII

       ebcdic from ASCII to EBCDIC

       ibm    from ASCII to alternated EBCDIC

       block  pad newline-terminated records with spaces to cbs-size

       unblock
              replace trailing spaces in cbs-size records with newline

       lcase  change upper case to lower case

       notrunc
              do not truncate the output file

       ucase  change lower case to upper case

       swab   swap every pair of input bytes

       noerror
              continue after read errors

       sync   pad  every  input block with NULs to ibs-size; when used with block or unblock, pad
              with spaces rather than NULs

AUTHOR

       Written by: dcfldd by Nicholas Harbour, GNU dd by Paul Rubin, David MacKenzie  and  Stuart
       Kemp.

REPORTING BUGS

       Report bugs to <nicholasharbour@yahoo.com>.

COPYRIGHT

       Copyright © 1985-2006 Free Software Foundation, Inc.
       This  is  free software; see the source for copying conditions.  There is NO warranty; not
       even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

SEE ALSO

       The full documentation for dcfldd is maintained as a Texinfo  manual.   If  the  info  and
       dcfldd programs are properly installed at your site, the command

              info dcfldd

       should give you access to the complete manual.