rectify - induce fixed length record groups from data

rectify induces fixed length record groups from input data by sampling and comparing character frequencies. The standard input is read if - or no files are specified.

-c, --context=context

List context records at the beginning and end of record groups larger that 3*context.

-d, --description=file

Specify a structured dump description file. Each line of this file describes the size and content of a contiguous portion of the input file. The description is applied separately to each input file. Comments and optional labels in the following descriptions are listed with the --verbose option. Supported descriptions are:

c comment

comment

d size [label]

size bytes of data with optional label

i size [label]

ignore size bytes of data

r size count [label]

count records of length size

t count

Match count records against the T record table. count=0 continues until no record type match is found.

z size [label]

a string with length determined by a size byte binary integer

T idlen id size unit [offset]

Defines a sized record table entry.

idlen

type identifier length, must be <= 4 bytes

id

type identifier, starting at record offset 0

size

default record size

unit

if > 0 then the record is variable length and the size is the byte at offset

offset

if unit > 0 then this byte multiplied by unit is the size of variable length data appended to the record

-f, --format=format

Byte output printf(3) format. The default value is 02x.

-g, --group

Group output in 4's. On by default; -g means --nogroup.

-m, --min=min

Minimum record length to consider. The default value is 8.

-n, --count=count

List the top count candidate record lengths. The default value is 16.

-o, --offset=offset

Start description listing at offset. The default value is 0.

-r, --run=run

List runs at least as long as run.

-v, --verbose

Dump description labels with data.

pin(1), pop(1)

version

rectify (AT&T Research) 1999-03-22

author

Glenn Fowler <gsf@research.att.com>

copyright

Copyright © 1998-2012 AT&T Intellectual Property

license

http://www.eclipse.org/org/documents/epl-v10.html