On Wed, May 21, 2003 at 11:50:27PM +0100, richard wrote:

Hello ALUG list,

Does anyone know to use the hexdump program?

I've been trying all night (and am at serious risk of fatal caffeine poisoning!)

All I want it to do is print every byte of a file in hex notation without any other rubbish (no indexes, no ASCII, no spaces, no line feeds, no nothing).

This *may* do something akin to what you're looking for:

perl -e 'while(read(STDIN,$i,1)){printf("%x",ord($i))}' < infile > outfile

I would check that the output is correct though.

It claims that you can pass it a format string in the same format as fprintf() so I tried this: $ hexdump -e "%x" {filename} >{outputfile}

but it just said that my format string was a "bad format {%x}".

Any help would be very much appreciated!

Richard.

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richard richard.lewis@uea.ac.uk writes:

Does anyone know to use the hexdump program?

I've been trying all night (and am at serious risk of fatal caffeine poisoning!)

All I want it to do is print every byte of a file in hex notation without any other rubbish (no indexes, no ASCII, no spaces, no line feeds, no nothing).

It claims that you can pass it a format string in the same format as fprintf() so I tried this: $ hexdump -e "%x" {filename} >{outputfile}

In fact, it says:

The format is required and must be surrounded by double quote (" ") marks. It is interpreted as a fprintf-style format string (see fprintf(3)), with the following exceptions:

The quotes you typed are removed by the shell and must be escaped if they are to be passed to the hexdump program itself, e.g.:

hexdump -e "%x" /path/to/your/file

I've no idea why it requires the quotes at all...

However I don't think hexdump can easily be pressed into service for what you want to do. I'd use:

perl -pe 's/./sprintf("%x",ord($&))/sge' FILENAME