09-27-2014
How to replace with "sed" some hex values by other hex values?
Assume I have a file \usr\home\\somedir\myfile123.txt
and I want to replace all occurencies of the two (concatenated) hex values x'AD' x'A0' bytwo other (concatenated) hex values x'20' x'6E'
How can I achieve this with the gnu sed tool?
Additional question: Is there a way to let sed show the number of replaced occurencies BEFORE or AFTER the run?
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RAX2(1) BSD General Commands Manual RAX2(1)
NAME
rax2 -- radare base converter
SYNOPSIS
rax2 [-ebsSvxkh] [[value] ...]
DESCRIPTION
This command is part of the radare project.
This command allows you to convert values between positive and negative integer, float octal, binary and hexadecimal values.
OPTIONS
-e Swap endian.
-b Convert from binary string to caracter (rax2 -b 01000101)
-s Convert from hex string to caracter (rax2 -s 43 4a 50)
-S Convert from hex string to caracter (rax2 -S C J P)
-v Show program version
-x Convert a string into a hash
-k Keep de same base as the input data
-h Show usage help message
USAGE
Available variable types are:
int -> hex rax2 10
hex -> int rax2 0xa
-int -> hex rax2 -77
-hex -> int rax2 0xffffffb3
int -> bin rax2 b30
bin -> int rax2 1010d
float -> hex rax2 3.33f
hex -> float rax2 Fx40551ed8
oct -> hex rax2 35o
hex -> oct rax2 Ox12 (O is a letter)
bin -> hex rax2 1100011b
hex -> bin rax2 Bx63
With no arguments, rax2 reads values from stdin. You can pass one or more values as arguments.
$ rax2 33 0x41 0101b
0x21
65
0x5
You can do 'unpack' hexpair encoded strings easily.
$ rax2 -s 41 42 43
ABC
And it supports some math operations.
$ rax2
0x5*101b+5
30
It is very useful tool for scripting, so you can read floating point values, or get the integer offset of a jump or a stack delta when ana-
lyzing programs.
SEE ALSO
radare2(1), rahash2(1), rafind2(1), rabin2(1), ranal2(1), radiff2(1), ragg2(1), rarun2(1), rasm2(1),
AUTHORS
pancake <pancake@nopcode.org>, nibble <nibble@develsec.org>
BSD
Mar 12, 2010 BSD