dcfldd

Usage: dcfldd [OPTION]...
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 seperate 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
Report bugs to <nicholasharbour@yahoo.com>.