It is fully working on MacOS OSX 10.7.5 and inside the default Terminal.
My Linux boxes are at work ATM so I am unable to test on those systems so I am asking for some help.
Would you guys please run it and see if it works on your systems. TIA...
The code is fully explanitory so no need to say any more...
Watch for wordwrapping, etc, etc...
- Code: Select all
# !/bin/sh
#
# Bin2Hex2Dec.sh
#
# A DEMO to show how to display the contents of a binary file onto the screen and convert any single one of
# those hexadecimal contents to decimal, retrieve the decimal string and use it ii a simple addition of the
# retrieved decimal string with a fixed number to give a result. The idea was to be able to get a byte value
# from say an external source and use it inside a bash script, in this case a value stored on the HDD.
#
# This DEMO was only designed for a Macbook Pro 13 inch, OSX 10.7.5 using the default, (BASH), Terminal.
# It has NOT been tested on any other platform but I suspect other Linux and UNIX flavours might also work.
#
# To run use the usual method for launching an _executable_ from its /directory/drawer/folder:-
#
# xxxxx$ ./Bin2Hex2Dec.sh<CR>
#
# And away you go...
#
# This script will need to made executable using the command "chmod" and will save and load files to YOUR
# default /directory/drawer/folder. The files saved to the HDD will be named:-
# BinaryString.dat
# BinaryString.txt
#
# $VER: Bin2Hex2Dec.sh_Version_0.00.10_Public_Domain_B.Walker_G0LCU.
# This is Public Domain and you may do with it as you please. Ignore the (C) inside the code...
# Set up a simple user screen/window...
clear
printf "\n\$VER: Bin2Hex2Dec.sh_Version_0.00.10_Public_Domain_B.Walker_G0LCU.\n"
printf "\nGenerate and save a binary file, display a hexadecimal dump of that file,\n"
printf "select a single byte from this binary file, display as adecimal number in\n"
printf "string format then add this string number to another number...\n\n"
# NOTE:- Double back slashes required to ensure binary is saved rather than the string.
binstr="\\x00\\x07\\x0A\\x0D\\x7F(C)2012, B.Walker, G0LCU.\\x80\\xFF"
# NOTE:- Inverted commas around "$binstr" and save 32 byte long string as BinaryString.dat into your default drawer.
printf "$binstr" > BinaryString.dat
printf "Offset. Hexadecimal dump. ASCII dump.\n"
# Do a text hexadecimal dump to the screen only of the 32 byte string...
hexdump -C BinaryString.dat
# Just an offset is needed for a single byte with a "subsript" offset inside the range of 0 to 31 for this 32 byte dump.
# The first byte is chosen for this DEMO. Just change this value to anything between 0 and 31 inclusive.
subscript=0
# Now select this single byte and save the value as a decimal string.
hexdump -n1 -s$subscript -v -e '1/1 "%u"' BinaryString.dat > BinaryString.txt
# Allow time for grabbed decimal byte value string to settle.
sleep 1
# The "subscript" offset is set at the first byte in the string, value zero, (0)...
printf "\nNow obtain the _byte_ from offset 0, the first byte, (0x00), single\n"
printf "byte length, already converted to a decimal string from hexadecimal...\n\n"
# Now retrieve the decimal byte string for further use from the file "BinaryString.txt".
read somedata < "BinaryString.txt"
# Now manipulate the retrieved string by adding a number to it...
printf "Decimal value in string format = $somedata...\n\n"
printf "Now ADD a number 7 to the decoded decimal string. $somedata + 7 = "$(($somedata+7))"...\n\n"
printf "(Now edit the script and change the _variable_ ~subscript~ to another value.)\n\n"
# Bin2Hex2Dec.sh DEMO end.
# Enjoy finding simple solutions to often very difficult problems... ;o)
Please give you Linux flavour and the Shell/Terminal you use...
Many thanks to those who help...
