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bs=BYTES
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| |
force ibs=BYTES and obs=BYTES
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cbs=BYTES
|
| |
convert BYTES bytes at a time
|
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conv=KEYWORDS
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| |
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
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|
|
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
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|
|
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
|
|
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